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1 | /* | |
2 | * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved | |
4 | * Copyright 2005 Nokia. All rights reserved. | |
5 | * | |
6 | * Licensed under the OpenSSL license (the "License"). You may not use | |
7 | * this file except in compliance with the License. You can obtain a copy | |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include "ssl_locl.h" | |
14 | #include <openssl/objects.h> | |
15 | #include <openssl/x509v3.h> | |
16 | #include <openssl/rand.h> | |
17 | #include <openssl/ocsp.h> | |
18 | #include <openssl/dh.h> | |
19 | #include <openssl/engine.h> | |
20 | #include <openssl/async.h> | |
21 | #include <openssl/ct.h> | |
22 | #include "internal/cryptlib.h" | |
23 | #include "internal/rand.h" | |
24 | #include "internal/refcount.h" | |
25 | ||
26 | const char SSL_version_str[] = OPENSSL_VERSION_TEXT; | |
27 | ||
28 | SSL3_ENC_METHOD ssl3_undef_enc_method = { | |
29 | /* | |
30 | * evil casts, but these functions are only called if there's a library | |
31 | * bug | |
32 | */ | |
33 | (int (*)(SSL *, SSL3_RECORD *, size_t, int))ssl_undefined_function, | |
34 | (int (*)(SSL *, SSL3_RECORD *, unsigned char *, int))ssl_undefined_function, | |
35 | ssl_undefined_function, | |
36 | (int (*)(SSL *, unsigned char *, unsigned char *, size_t, size_t *)) | |
37 | ssl_undefined_function, | |
38 | (int (*)(SSL *, int))ssl_undefined_function, | |
39 | (size_t (*)(SSL *, const char *, size_t, unsigned char *)) | |
40 | ssl_undefined_function, | |
41 | NULL, /* client_finished_label */ | |
42 | 0, /* client_finished_label_len */ | |
43 | NULL, /* server_finished_label */ | |
44 | 0, /* server_finished_label_len */ | |
45 | (int (*)(int))ssl_undefined_function, | |
46 | (int (*)(SSL *, unsigned char *, size_t, const char *, | |
47 | size_t, const unsigned char *, size_t, | |
48 | int use_context))ssl_undefined_function, | |
49 | }; | |
50 | ||
51 | struct ssl_async_args { | |
52 | SSL *s; | |
53 | void *buf; | |
54 | size_t num; | |
55 | enum { READFUNC, WRITEFUNC, OTHERFUNC } type; | |
56 | union { | |
57 | int (*func_read) (SSL *, void *, size_t, size_t *); | |
58 | int (*func_write) (SSL *, const void *, size_t, size_t *); | |
59 | int (*func_other) (SSL *); | |
60 | } f; | |
61 | }; | |
62 | ||
63 | static const struct { | |
64 | uint8_t mtype; | |
65 | uint8_t ord; | |
66 | int nid; | |
67 | } dane_mds[] = { | |
68 | { | |
69 | DANETLS_MATCHING_FULL, 0, NID_undef | |
70 | }, | |
71 | { | |
72 | DANETLS_MATCHING_2256, 1, NID_sha256 | |
73 | }, | |
74 | { | |
75 | DANETLS_MATCHING_2512, 2, NID_sha512 | |
76 | }, | |
77 | }; | |
78 | ||
79 | static int dane_ctx_enable(struct dane_ctx_st *dctx) | |
80 | { | |
81 | const EVP_MD **mdevp; | |
82 | uint8_t *mdord; | |
83 | uint8_t mdmax = DANETLS_MATCHING_LAST; | |
84 | int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */ | |
85 | size_t i; | |
86 | ||
87 | if (dctx->mdevp != NULL) | |
88 | return 1; | |
89 | ||
90 | mdevp = OPENSSL_zalloc(n * sizeof(*mdevp)); | |
91 | mdord = OPENSSL_zalloc(n * sizeof(*mdord)); | |
92 | ||
93 | if (mdord == NULL || mdevp == NULL) { | |
94 | OPENSSL_free(mdord); | |
95 | OPENSSL_free(mdevp); | |
96 | SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE); | |
97 | return 0; | |
98 | } | |
99 | ||
100 | /* Install default entries */ | |
101 | for (i = 0; i < OSSL_NELEM(dane_mds); ++i) { | |
102 | const EVP_MD *md; | |
103 | ||
104 | if (dane_mds[i].nid == NID_undef || | |
105 | (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL) | |
106 | continue; | |
107 | mdevp[dane_mds[i].mtype] = md; | |
108 | mdord[dane_mds[i].mtype] = dane_mds[i].ord; | |
109 | } | |
110 | ||
111 | dctx->mdevp = mdevp; | |
112 | dctx->mdord = mdord; | |
113 | dctx->mdmax = mdmax; | |
114 | ||
115 | return 1; | |
116 | } | |
117 | ||
118 | static void dane_ctx_final(struct dane_ctx_st *dctx) | |
119 | { | |
120 | OPENSSL_free(dctx->mdevp); | |
121 | dctx->mdevp = NULL; | |
122 | ||
123 | OPENSSL_free(dctx->mdord); | |
124 | dctx->mdord = NULL; | |
125 | dctx->mdmax = 0; | |
126 | } | |
127 | ||
128 | static void tlsa_free(danetls_record *t) | |
129 | { | |
130 | if (t == NULL) | |
131 | return; | |
132 | OPENSSL_free(t->data); | |
133 | EVP_PKEY_free(t->spki); | |
134 | OPENSSL_free(t); | |
135 | } | |
136 | ||
137 | static void dane_final(SSL_DANE *dane) | |
138 | { | |
139 | sk_danetls_record_pop_free(dane->trecs, tlsa_free); | |
140 | dane->trecs = NULL; | |
141 | ||
142 | sk_X509_pop_free(dane->certs, X509_free); | |
143 | dane->certs = NULL; | |
144 | ||
145 | X509_free(dane->mcert); | |
146 | dane->mcert = NULL; | |
147 | dane->mtlsa = NULL; | |
148 | dane->mdpth = -1; | |
149 | dane->pdpth = -1; | |
150 | } | |
151 | ||
152 | /* | |
153 | * dane_copy - Copy dane configuration, sans verification state. | |
154 | */ | |
155 | static int ssl_dane_dup(SSL *to, SSL *from) | |
156 | { | |
157 | int num; | |
158 | int i; | |
159 | ||
160 | if (!DANETLS_ENABLED(&from->dane)) | |
161 | return 1; | |
162 | ||
163 | num = sk_danetls_record_num(from->dane.trecs); | |
164 | dane_final(&to->dane); | |
165 | to->dane.flags = from->dane.flags; | |
166 | to->dane.dctx = &to->ctx->dane; | |
167 | to->dane.trecs = sk_danetls_record_new_reserve(NULL, num); | |
168 | ||
169 | if (to->dane.trecs == NULL) { | |
170 | SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE); | |
171 | return 0; | |
172 | } | |
173 | ||
174 | for (i = 0; i < num; ++i) { | |
175 | danetls_record *t = sk_danetls_record_value(from->dane.trecs, i); | |
176 | ||
177 | if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype, | |
178 | t->data, t->dlen) <= 0) | |
179 | return 0; | |
180 | } | |
181 | return 1; | |
182 | } | |
183 | ||
184 | static int dane_mtype_set(struct dane_ctx_st *dctx, | |
185 | const EVP_MD *md, uint8_t mtype, uint8_t ord) | |
186 | { | |
187 | int i; | |
188 | ||
189 | if (mtype == DANETLS_MATCHING_FULL && md != NULL) { | |
190 | SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | if (mtype > dctx->mdmax) { | |
195 | const EVP_MD **mdevp; | |
196 | uint8_t *mdord; | |
197 | int n = ((int)mtype) + 1; | |
198 | ||
199 | mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp)); | |
200 | if (mdevp == NULL) { | |
201 | SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE); | |
202 | return -1; | |
203 | } | |
204 | dctx->mdevp = mdevp; | |
205 | ||
206 | mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord)); | |
207 | if (mdord == NULL) { | |
208 | SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE); | |
209 | return -1; | |
210 | } | |
211 | dctx->mdord = mdord; | |
212 | ||
213 | /* Zero-fill any gaps */ | |
214 | for (i = dctx->mdmax + 1; i < mtype; ++i) { | |
215 | mdevp[i] = NULL; | |
216 | mdord[i] = 0; | |
217 | } | |
218 | ||
219 | dctx->mdmax = mtype; | |
220 | } | |
221 | ||
222 | dctx->mdevp[mtype] = md; | |
223 | /* Coerce ordinal of disabled matching types to 0 */ | |
224 | dctx->mdord[mtype] = (md == NULL) ? 0 : ord; | |
225 | ||
226 | return 1; | |
227 | } | |
228 | ||
229 | static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype) | |
230 | { | |
231 | if (mtype > dane->dctx->mdmax) | |
232 | return NULL; | |
233 | return dane->dctx->mdevp[mtype]; | |
234 | } | |
235 | ||
236 | static int dane_tlsa_add(SSL_DANE *dane, | |
237 | uint8_t usage, | |
238 | uint8_t selector, | |
239 | uint8_t mtype, unsigned char *data, size_t dlen) | |
240 | { | |
241 | danetls_record *t; | |
242 | const EVP_MD *md = NULL; | |
243 | int ilen = (int)dlen; | |
244 | int i; | |
245 | int num; | |
246 | ||
247 | if (dane->trecs == NULL) { | |
248 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED); | |
249 | return -1; | |
250 | } | |
251 | ||
252 | if (ilen < 0 || dlen != (size_t)ilen) { | |
253 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | if (usage > DANETLS_USAGE_LAST) { | |
258 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | if (selector > DANETLS_SELECTOR_LAST) { | |
263 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | if (mtype != DANETLS_MATCHING_FULL) { | |
268 | md = tlsa_md_get(dane, mtype); | |
269 | if (md == NULL) { | |
270 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE); | |
271 | return 0; | |
272 | } | |
273 | } | |
274 | ||
275 | if (md != NULL && dlen != (size_t)EVP_MD_size(md)) { | |
276 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH); | |
277 | return 0; | |
278 | } | |
279 | if (!data) { | |
280 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA); | |
281 | return 0; | |
282 | } | |
283 | ||
284 | if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) { | |
285 | SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); | |
286 | return -1; | |
287 | } | |
288 | ||
289 | t->usage = usage; | |
290 | t->selector = selector; | |
291 | t->mtype = mtype; | |
292 | t->data = OPENSSL_malloc(dlen); | |
293 | if (t->data == NULL) { | |
294 | tlsa_free(t); | |
295 | SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); | |
296 | return -1; | |
297 | } | |
298 | memcpy(t->data, data, dlen); | |
299 | t->dlen = dlen; | |
300 | ||
301 | /* Validate and cache full certificate or public key */ | |
302 | if (mtype == DANETLS_MATCHING_FULL) { | |
303 | const unsigned char *p = data; | |
304 | X509 *cert = NULL; | |
305 | EVP_PKEY *pkey = NULL; | |
306 | ||
307 | switch (selector) { | |
308 | case DANETLS_SELECTOR_CERT: | |
309 | if (!d2i_X509(&cert, &p, ilen) || p < data || | |
310 | dlen != (size_t)(p - data)) { | |
311 | tlsa_free(t); | |
312 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE); | |
313 | return 0; | |
314 | } | |
315 | if (X509_get0_pubkey(cert) == NULL) { | |
316 | tlsa_free(t); | |
317 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) { | |
322 | X509_free(cert); | |
323 | break; | |
324 | } | |
325 | ||
326 | /* | |
327 | * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA | |
328 | * records that contain full certificates of trust-anchors that are | |
329 | * not present in the wire chain. For usage PKIX-TA(0), we augment | |
330 | * the chain with untrusted Full(0) certificates from DNS, in case | |
331 | * they are missing from the chain. | |
332 | */ | |
333 | if ((dane->certs == NULL && | |
334 | (dane->certs = sk_X509_new_null()) == NULL) || | |
335 | !sk_X509_push(dane->certs, cert)) { | |
336 | SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); | |
337 | X509_free(cert); | |
338 | tlsa_free(t); | |
339 | return -1; | |
340 | } | |
341 | break; | |
342 | ||
343 | case DANETLS_SELECTOR_SPKI: | |
344 | if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data || | |
345 | dlen != (size_t)(p - data)) { | |
346 | tlsa_free(t); | |
347 | SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY); | |
348 | return 0; | |
349 | } | |
350 | ||
351 | /* | |
352 | * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA | |
353 | * records that contain full bare keys of trust-anchors that are | |
354 | * not present in the wire chain. | |
355 | */ | |
356 | if (usage == DANETLS_USAGE_DANE_TA) | |
357 | t->spki = pkey; | |
358 | else | |
359 | EVP_PKEY_free(pkey); | |
360 | break; | |
361 | } | |
362 | } | |
363 | ||
364 | /*- | |
365 | * Find the right insertion point for the new record. | |
366 | * | |
367 | * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that | |
368 | * they can be processed first, as they require no chain building, and no | |
369 | * expiration or hostname checks. Because DANE-EE(3) is numerically | |
370 | * largest, this is accomplished via descending sort by "usage". | |
371 | * | |
372 | * We also sort in descending order by matching ordinal to simplify | |
373 | * the implementation of digest agility in the verification code. | |
374 | * | |
375 | * The choice of order for the selector is not significant, so we | |
376 | * use the same descending order for consistency. | |
377 | */ | |
378 | num = sk_danetls_record_num(dane->trecs); | |
379 | for (i = 0; i < num; ++i) { | |
380 | danetls_record *rec = sk_danetls_record_value(dane->trecs, i); | |
381 | ||
382 | if (rec->usage > usage) | |
383 | continue; | |
384 | if (rec->usage < usage) | |
385 | break; | |
386 | if (rec->selector > selector) | |
387 | continue; | |
388 | if (rec->selector < selector) | |
389 | break; | |
390 | if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype]) | |
391 | continue; | |
392 | break; | |
393 | } | |
394 | ||
395 | if (!sk_danetls_record_insert(dane->trecs, t, i)) { | |
396 | tlsa_free(t); | |
397 | SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); | |
398 | return -1; | |
399 | } | |
400 | dane->umask |= DANETLS_USAGE_BIT(usage); | |
401 | ||
402 | return 1; | |
403 | } | |
404 | ||
405 | /* | |
406 | * Return 0 if there is only one version configured and it was disabled | |
407 | * at configure time. Return 1 otherwise. | |
408 | */ | |
409 | static int ssl_check_allowed_versions(int min_version, int max_version) | |
410 | { | |
411 | int minisdtls = 0, maxisdtls = 0; | |
412 | ||
413 | /* Figure out if we're doing DTLS versions or TLS versions */ | |
414 | if (min_version == DTLS1_BAD_VER | |
415 | || min_version >> 8 == DTLS1_VERSION_MAJOR) | |
416 | minisdtls = 1; | |
417 | if (max_version == DTLS1_BAD_VER | |
418 | || max_version >> 8 == DTLS1_VERSION_MAJOR) | |
419 | maxisdtls = 1; | |
420 | /* A wildcard version of 0 could be DTLS or TLS. */ | |
421 | if ((minisdtls && !maxisdtls && max_version != 0) | |
422 | || (maxisdtls && !minisdtls && min_version != 0)) { | |
423 | /* Mixing DTLS and TLS versions will lead to sadness; deny it. */ | |
424 | return 0; | |
425 | } | |
426 | ||
427 | if (minisdtls || maxisdtls) { | |
428 | /* Do DTLS version checks. */ | |
429 | if (min_version == 0) | |
430 | /* Ignore DTLS1_BAD_VER */ | |
431 | min_version = DTLS1_VERSION; | |
432 | if (max_version == 0) | |
433 | max_version = DTLS1_2_VERSION; | |
434 | #ifdef OPENSSL_NO_DTLS1_2 | |
435 | if (max_version == DTLS1_2_VERSION) | |
436 | max_version = DTLS1_VERSION; | |
437 | #endif | |
438 | #ifdef OPENSSL_NO_DTLS1 | |
439 | if (min_version == DTLS1_VERSION) | |
440 | min_version = DTLS1_2_VERSION; | |
441 | #endif | |
442 | /* Done massaging versions; do the check. */ | |
443 | if (0 | |
444 | #ifdef OPENSSL_NO_DTLS1 | |
445 | || (DTLS_VERSION_GE(min_version, DTLS1_VERSION) | |
446 | && DTLS_VERSION_GE(DTLS1_VERSION, max_version)) | |
447 | #endif | |
448 | #ifdef OPENSSL_NO_DTLS1_2 | |
449 | || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION) | |
450 | && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version)) | |
451 | #endif | |
452 | ) | |
453 | return 0; | |
454 | } else { | |
455 | /* Regular TLS version checks. */ | |
456 | if (min_version == 0) | |
457 | min_version = SSL3_VERSION; | |
458 | if (max_version == 0) | |
459 | max_version = TLS1_3_VERSION; | |
460 | #ifdef OPENSSL_NO_TLS1_3 | |
461 | if (max_version == TLS1_3_VERSION) | |
462 | max_version = TLS1_2_VERSION; | |
463 | #endif | |
464 | #ifdef OPENSSL_NO_TLS1_2 | |
465 | if (max_version == TLS1_2_VERSION) | |
466 | max_version = TLS1_1_VERSION; | |
467 | #endif | |
468 | #ifdef OPENSSL_NO_TLS1_1 | |
469 | if (max_version == TLS1_1_VERSION) | |
470 | max_version = TLS1_VERSION; | |
471 | #endif | |
472 | #ifdef OPENSSL_NO_TLS1 | |
473 | if (max_version == TLS1_VERSION) | |
474 | max_version = SSL3_VERSION; | |
475 | #endif | |
476 | #ifdef OPENSSL_NO_SSL3 | |
477 | if (min_version == SSL3_VERSION) | |
478 | min_version = TLS1_VERSION; | |
479 | #endif | |
480 | #ifdef OPENSSL_NO_TLS1 | |
481 | if (min_version == TLS1_VERSION) | |
482 | min_version = TLS1_1_VERSION; | |
483 | #endif | |
484 | #ifdef OPENSSL_NO_TLS1_1 | |
485 | if (min_version == TLS1_1_VERSION) | |
486 | min_version = TLS1_2_VERSION; | |
487 | #endif | |
488 | #ifdef OPENSSL_NO_TLS1_2 | |
489 | if (min_version == TLS1_2_VERSION) | |
490 | min_version = TLS1_3_VERSION; | |
491 | #endif | |
492 | /* Done massaging versions; do the check. */ | |
493 | if (0 | |
494 | #ifdef OPENSSL_NO_SSL3 | |
495 | || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version) | |
496 | #endif | |
497 | #ifdef OPENSSL_NO_TLS1 | |
498 | || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version) | |
499 | #endif | |
500 | #ifdef OPENSSL_NO_TLS1_1 | |
501 | || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version) | |
502 | #endif | |
503 | #ifdef OPENSSL_NO_TLS1_2 | |
504 | || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version) | |
505 | #endif | |
506 | #ifdef OPENSSL_NO_TLS1_3 | |
507 | || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version) | |
508 | #endif | |
509 | ) | |
510 | return 0; | |
511 | } | |
512 | return 1; | |
513 | } | |
514 | ||
515 | static void clear_ciphers(SSL *s) | |
516 | { | |
517 | /* clear the current cipher */ | |
518 | ssl_clear_cipher_ctx(s); | |
519 | ssl_clear_hash_ctx(&s->read_hash); | |
520 | ssl_clear_hash_ctx(&s->write_hash); | |
521 | } | |
522 | ||
523 | int SSL_clear(SSL *s) | |
524 | { | |
525 | if (s->method == NULL) { | |
526 | SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | if (ssl_clear_bad_session(s)) { | |
531 | SSL_SESSION_free(s->session); | |
532 | s->session = NULL; | |
533 | } | |
534 | SSL_SESSION_free(s->psksession); | |
535 | s->psksession = NULL; | |
536 | OPENSSL_free(s->psksession_id); | |
537 | s->psksession_id = NULL; | |
538 | s->psksession_id_len = 0; | |
539 | ||
540 | s->error = 0; | |
541 | s->hit = 0; | |
542 | s->shutdown = 0; | |
543 | ||
544 | if (s->renegotiate) { | |
545 | SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | ossl_statem_clear(s); | |
550 | ||
551 | s->version = s->method->version; | |
552 | s->client_version = s->version; | |
553 | s->rwstate = SSL_NOTHING; | |
554 | ||
555 | BUF_MEM_free(s->init_buf); | |
556 | s->init_buf = NULL; | |
557 | clear_ciphers(s); | |
558 | s->first_packet = 0; | |
559 | ||
560 | s->key_update = SSL_KEY_UPDATE_NONE; | |
561 | ||
562 | /* Reset DANE verification result state */ | |
563 | s->dane.mdpth = -1; | |
564 | s->dane.pdpth = -1; | |
565 | X509_free(s->dane.mcert); | |
566 | s->dane.mcert = NULL; | |
567 | s->dane.mtlsa = NULL; | |
568 | ||
569 | /* Clear the verification result peername */ | |
570 | X509_VERIFY_PARAM_move_peername(s->param, NULL); | |
571 | ||
572 | /* | |
573 | * Check to see if we were changed into a different method, if so, revert | |
574 | * back. | |
575 | */ | |
576 | if (s->method != s->ctx->method) { | |
577 | s->method->ssl_free(s); | |
578 | s->method = s->ctx->method; | |
579 | if (!s->method->ssl_new(s)) | |
580 | return 0; | |
581 | } else { | |
582 | if (!s->method->ssl_clear(s)) | |
583 | return 0; | |
584 | } | |
585 | ||
586 | RECORD_LAYER_clear(&s->rlayer); | |
587 | ||
588 | return 1; | |
589 | } | |
590 | ||
591 | /** Used to change an SSL_CTXs default SSL method type */ | |
592 | int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) | |
593 | { | |
594 | STACK_OF(SSL_CIPHER) *sk; | |
595 | ||
596 | ctx->method = meth; | |
597 | ||
598 | sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list), | |
599 | &(ctx->cipher_list_by_id), | |
600 | SSL_DEFAULT_CIPHER_LIST, ctx->cert); | |
601 | if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) { | |
602 | SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); | |
603 | return 0; | |
604 | } | |
605 | return 1; | |
606 | } | |
607 | ||
608 | SSL *SSL_new(SSL_CTX *ctx) | |
609 | { | |
610 | SSL *s; | |
611 | ||
612 | if (ctx == NULL) { | |
613 | SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX); | |
614 | return NULL; | |
615 | } | |
616 | if (ctx->method == NULL) { | |
617 | SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | s = OPENSSL_zalloc(sizeof(*s)); | |
622 | if (s == NULL) | |
623 | goto err; | |
624 | ||
625 | s->references = 1; | |
626 | s->lock = CRYPTO_THREAD_lock_new(); | |
627 | if (s->lock == NULL) { | |
628 | OPENSSL_free(s); | |
629 | s = NULL; | |
630 | goto err; | |
631 | } | |
632 | ||
633 | /* | |
634 | * If not using the standard RAND (say for fuzzing), then don't use a | |
635 | * chained DRBG. | |
636 | */ | |
637 | if (RAND_get_rand_method() == RAND_OpenSSL()) { | |
638 | s->drbg = | |
639 | RAND_DRBG_new(RAND_DRBG_NID, RAND_DRBG_FLAG_CTR_USE_DF, | |
640 | RAND_DRBG_get0_global()); | |
641 | if (s->drbg == NULL | |
642 | || RAND_DRBG_instantiate(s->drbg, | |
643 | (const unsigned char *) SSL_version_str, | |
644 | sizeof(SSL_version_str) - 1) == 0) | |
645 | goto err; | |
646 | } | |
647 | ||
648 | RECORD_LAYER_init(&s->rlayer, s); | |
649 | ||
650 | s->options = ctx->options; | |
651 | s->dane.flags = ctx->dane.flags; | |
652 | s->min_proto_version = ctx->min_proto_version; | |
653 | s->max_proto_version = ctx->max_proto_version; | |
654 | s->mode = ctx->mode; | |
655 | s->max_cert_list = ctx->max_cert_list; | |
656 | s->max_early_data = ctx->max_early_data; | |
657 | ||
658 | /* | |
659 | * Earlier library versions used to copy the pointer to the CERT, not | |
660 | * its contents; only when setting new parameters for the per-SSL | |
661 | * copy, ssl_cert_new would be called (and the direct reference to | |
662 | * the per-SSL_CTX settings would be lost, but those still were | |
663 | * indirectly accessed for various purposes, and for that reason they | |
664 | * used to be known as s->ctx->default_cert). Now we don't look at the | |
665 | * SSL_CTX's CERT after having duplicated it once. | |
666 | */ | |
667 | s->cert = ssl_cert_dup(ctx->cert); | |
668 | if (s->cert == NULL) | |
669 | goto err; | |
670 | ||
671 | RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead); | |
672 | s->msg_callback = ctx->msg_callback; | |
673 | s->msg_callback_arg = ctx->msg_callback_arg; | |
674 | s->verify_mode = ctx->verify_mode; | |
675 | s->not_resumable_session_cb = ctx->not_resumable_session_cb; | |
676 | s->record_padding_cb = ctx->record_padding_cb; | |
677 | s->record_padding_arg = ctx->record_padding_arg; | |
678 | s->block_padding = ctx->block_padding; | |
679 | s->sid_ctx_length = ctx->sid_ctx_length; | |
680 | if (!ossl_assert(s->sid_ctx_length <= sizeof s->sid_ctx)) | |
681 | goto err; | |
682 | memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); | |
683 | s->verify_callback = ctx->default_verify_callback; | |
684 | s->generate_session_id = ctx->generate_session_id; | |
685 | ||
686 | s->param = X509_VERIFY_PARAM_new(); | |
687 | if (s->param == NULL) | |
688 | goto err; | |
689 | X509_VERIFY_PARAM_inherit(s->param, ctx->param); | |
690 | s->quiet_shutdown = ctx->quiet_shutdown; | |
691 | s->max_send_fragment = ctx->max_send_fragment; | |
692 | s->split_send_fragment = ctx->split_send_fragment; | |
693 | s->max_pipelines = ctx->max_pipelines; | |
694 | if (s->max_pipelines > 1) | |
695 | RECORD_LAYER_set_read_ahead(&s->rlayer, 1); | |
696 | if (ctx->default_read_buf_len > 0) | |
697 | SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len); | |
698 | ||
699 | SSL_CTX_up_ref(ctx); | |
700 | s->ctx = ctx; | |
701 | s->ext.debug_cb = 0; | |
702 | s->ext.debug_arg = NULL; | |
703 | s->ext.ticket_expected = 0; | |
704 | s->ext.status_type = ctx->ext.status_type; | |
705 | s->ext.status_expected = 0; | |
706 | s->ext.ocsp.ids = NULL; | |
707 | s->ext.ocsp.exts = NULL; | |
708 | s->ext.ocsp.resp = NULL; | |
709 | s->ext.ocsp.resp_len = 0; | |
710 | SSL_CTX_up_ref(ctx); | |
711 | s->session_ctx = ctx; | |
712 | #ifndef OPENSSL_NO_EC | |
713 | if (ctx->ext.ecpointformats) { | |
714 | s->ext.ecpointformats = | |
715 | OPENSSL_memdup(ctx->ext.ecpointformats, | |
716 | ctx->ext.ecpointformats_len); | |
717 | if (!s->ext.ecpointformats) | |
718 | goto err; | |
719 | s->ext.ecpointformats_len = | |
720 | ctx->ext.ecpointformats_len; | |
721 | } | |
722 | if (ctx->ext.supportedgroups) { | |
723 | s->ext.supportedgroups = | |
724 | OPENSSL_memdup(ctx->ext.supportedgroups, | |
725 | ctx->ext.supportedgroups_len | |
726 | * sizeof(*ctx->ext.supportedgroups)); | |
727 | if (!s->ext.supportedgroups) | |
728 | goto err; | |
729 | s->ext.supportedgroups_len = ctx->ext.supportedgroups_len; | |
730 | } | |
731 | #endif | |
732 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
733 | s->ext.npn = NULL; | |
734 | #endif | |
735 | ||
736 | if (s->ctx->ext.alpn) { | |
737 | s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len); | |
738 | if (s->ext.alpn == NULL) | |
739 | goto err; | |
740 | memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len); | |
741 | s->ext.alpn_len = s->ctx->ext.alpn_len; | |
742 | } | |
743 | ||
744 | s->verified_chain = NULL; | |
745 | s->verify_result = X509_V_OK; | |
746 | ||
747 | s->default_passwd_callback = ctx->default_passwd_callback; | |
748 | s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata; | |
749 | ||
750 | s->method = ctx->method; | |
751 | ||
752 | s->key_update = SSL_KEY_UPDATE_NONE; | |
753 | ||
754 | if (!s->method->ssl_new(s)) | |
755 | goto err; | |
756 | ||
757 | s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1; | |
758 | ||
759 | if (!SSL_clear(s)) | |
760 | goto err; | |
761 | ||
762 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data)) | |
763 | goto err; | |
764 | ||
765 | #ifndef OPENSSL_NO_PSK | |
766 | s->psk_client_callback = ctx->psk_client_callback; | |
767 | s->psk_server_callback = ctx->psk_server_callback; | |
768 | #endif | |
769 | s->psk_find_session_cb = ctx->psk_find_session_cb; | |
770 | s->psk_use_session_cb = ctx->psk_use_session_cb; | |
771 | ||
772 | s->job = NULL; | |
773 | ||
774 | #ifndef OPENSSL_NO_CT | |
775 | if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback, | |
776 | ctx->ct_validation_callback_arg)) | |
777 | goto err; | |
778 | #endif | |
779 | ||
780 | return s; | |
781 | err: | |
782 | SSL_free(s); | |
783 | SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); | |
784 | return NULL; | |
785 | } | |
786 | ||
787 | int SSL_is_dtls(const SSL *s) | |
788 | { | |
789 | return SSL_IS_DTLS(s) ? 1 : 0; | |
790 | } | |
791 | ||
792 | int SSL_up_ref(SSL *s) | |
793 | { | |
794 | int i; | |
795 | ||
796 | if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0) | |
797 | return 0; | |
798 | ||
799 | REF_PRINT_COUNT("SSL", s); | |
800 | REF_ASSERT_ISNT(i < 2); | |
801 | return ((i > 1) ? 1 : 0); | |
802 | } | |
803 | ||
804 | int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, | |
805 | unsigned int sid_ctx_len) | |
806 | { | |
807 | if (sid_ctx_len > sizeof ctx->sid_ctx) { | |
808 | SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, | |
809 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
810 | return 0; | |
811 | } | |
812 | ctx->sid_ctx_length = sid_ctx_len; | |
813 | memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); | |
814 | ||
815 | return 1; | |
816 | } | |
817 | ||
818 | int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, | |
819 | unsigned int sid_ctx_len) | |
820 | { | |
821 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { | |
822 | SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, | |
823 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
824 | return 0; | |
825 | } | |
826 | ssl->sid_ctx_length = sid_ctx_len; | |
827 | memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); | |
828 | ||
829 | return 1; | |
830 | } | |
831 | ||
832 | int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) | |
833 | { | |
834 | CRYPTO_THREAD_write_lock(ctx->lock); | |
835 | ctx->generate_session_id = cb; | |
836 | CRYPTO_THREAD_unlock(ctx->lock); | |
837 | return 1; | |
838 | } | |
839 | ||
840 | int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) | |
841 | { | |
842 | CRYPTO_THREAD_write_lock(ssl->lock); | |
843 | ssl->generate_session_id = cb; | |
844 | CRYPTO_THREAD_unlock(ssl->lock); | |
845 | return 1; | |
846 | } | |
847 | ||
848 | int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, | |
849 | unsigned int id_len) | |
850 | { | |
851 | /* | |
852 | * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how | |
853 | * we can "construct" a session to give us the desired check - i.e. to | |
854 | * find if there's a session in the hash table that would conflict with | |
855 | * any new session built out of this id/id_len and the ssl_version in use | |
856 | * by this SSL. | |
857 | */ | |
858 | SSL_SESSION r, *p; | |
859 | ||
860 | if (id_len > sizeof r.session_id) | |
861 | return 0; | |
862 | ||
863 | r.ssl_version = ssl->version; | |
864 | r.session_id_length = id_len; | |
865 | memcpy(r.session_id, id, id_len); | |
866 | ||
867 | CRYPTO_THREAD_read_lock(ssl->session_ctx->lock); | |
868 | p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r); | |
869 | CRYPTO_THREAD_unlock(ssl->session_ctx->lock); | |
870 | return (p != NULL); | |
871 | } | |
872 | ||
873 | int SSL_CTX_set_purpose(SSL_CTX *s, int purpose) | |
874 | { | |
875 | return X509_VERIFY_PARAM_set_purpose(s->param, purpose); | |
876 | } | |
877 | ||
878 | int SSL_set_purpose(SSL *s, int purpose) | |
879 | { | |
880 | return X509_VERIFY_PARAM_set_purpose(s->param, purpose); | |
881 | } | |
882 | ||
883 | int SSL_CTX_set_trust(SSL_CTX *s, int trust) | |
884 | { | |
885 | return X509_VERIFY_PARAM_set_trust(s->param, trust); | |
886 | } | |
887 | ||
888 | int SSL_set_trust(SSL *s, int trust) | |
889 | { | |
890 | return X509_VERIFY_PARAM_set_trust(s->param, trust); | |
891 | } | |
892 | ||
893 | int SSL_set1_host(SSL *s, const char *hostname) | |
894 | { | |
895 | return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0); | |
896 | } | |
897 | ||
898 | int SSL_add1_host(SSL *s, const char *hostname) | |
899 | { | |
900 | return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0); | |
901 | } | |
902 | ||
903 | void SSL_set_hostflags(SSL *s, unsigned int flags) | |
904 | { | |
905 | X509_VERIFY_PARAM_set_hostflags(s->param, flags); | |
906 | } | |
907 | ||
908 | const char *SSL_get0_peername(SSL *s) | |
909 | { | |
910 | return X509_VERIFY_PARAM_get0_peername(s->param); | |
911 | } | |
912 | ||
913 | int SSL_CTX_dane_enable(SSL_CTX *ctx) | |
914 | { | |
915 | return dane_ctx_enable(&ctx->dane); | |
916 | } | |
917 | ||
918 | unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags) | |
919 | { | |
920 | unsigned long orig = ctx->dane.flags; | |
921 | ||
922 | ctx->dane.flags |= flags; | |
923 | return orig; | |
924 | } | |
925 | ||
926 | unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags) | |
927 | { | |
928 | unsigned long orig = ctx->dane.flags; | |
929 | ||
930 | ctx->dane.flags &= ~flags; | |
931 | return orig; | |
932 | } | |
933 | ||
934 | int SSL_dane_enable(SSL *s, const char *basedomain) | |
935 | { | |
936 | SSL_DANE *dane = &s->dane; | |
937 | ||
938 | if (s->ctx->dane.mdmax == 0) { | |
939 | SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED); | |
940 | return 0; | |
941 | } | |
942 | if (dane->trecs != NULL) { | |
943 | SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED); | |
944 | return 0; | |
945 | } | |
946 | ||
947 | /* | |
948 | * Default SNI name. This rejects empty names, while set1_host below | |
949 | * accepts them and disables host name checks. To avoid side-effects with | |
950 | * invalid input, set the SNI name first. | |
951 | */ | |
952 | if (s->ext.hostname == NULL) { | |
953 | if (!SSL_set_tlsext_host_name(s, basedomain)) { | |
954 | SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN); | |
955 | return -1; | |
956 | } | |
957 | } | |
958 | ||
959 | /* Primary RFC6125 reference identifier */ | |
960 | if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) { | |
961 | SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN); | |
962 | return -1; | |
963 | } | |
964 | ||
965 | dane->mdpth = -1; | |
966 | dane->pdpth = -1; | |
967 | dane->dctx = &s->ctx->dane; | |
968 | dane->trecs = sk_danetls_record_new_null(); | |
969 | ||
970 | if (dane->trecs == NULL) { | |
971 | SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE); | |
972 | return -1; | |
973 | } | |
974 | return 1; | |
975 | } | |
976 | ||
977 | unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags) | |
978 | { | |
979 | unsigned long orig = ssl->dane.flags; | |
980 | ||
981 | ssl->dane.flags |= flags; | |
982 | return orig; | |
983 | } | |
984 | ||
985 | unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags) | |
986 | { | |
987 | unsigned long orig = ssl->dane.flags; | |
988 | ||
989 | ssl->dane.flags &= ~flags; | |
990 | return orig; | |
991 | } | |
992 | ||
993 | int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki) | |
994 | { | |
995 | SSL_DANE *dane = &s->dane; | |
996 | ||
997 | if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK) | |
998 | return -1; | |
999 | if (dane->mtlsa) { | |
1000 | if (mcert) | |
1001 | *mcert = dane->mcert; | |
1002 | if (mspki) | |
1003 | *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL; | |
1004 | } | |
1005 | return dane->mdpth; | |
1006 | } | |
1007 | ||
1008 | int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector, | |
1009 | uint8_t *mtype, unsigned const char **data, size_t *dlen) | |
1010 | { | |
1011 | SSL_DANE *dane = &s->dane; | |
1012 | ||
1013 | if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK) | |
1014 | return -1; | |
1015 | if (dane->mtlsa) { | |
1016 | if (usage) | |
1017 | *usage = dane->mtlsa->usage; | |
1018 | if (selector) | |
1019 | *selector = dane->mtlsa->selector; | |
1020 | if (mtype) | |
1021 | *mtype = dane->mtlsa->mtype; | |
1022 | if (data) | |
1023 | *data = dane->mtlsa->data; | |
1024 | if (dlen) | |
1025 | *dlen = dane->mtlsa->dlen; | |
1026 | } | |
1027 | return dane->mdpth; | |
1028 | } | |
1029 | ||
1030 | SSL_DANE *SSL_get0_dane(SSL *s) | |
1031 | { | |
1032 | return &s->dane; | |
1033 | } | |
1034 | ||
1035 | int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector, | |
1036 | uint8_t mtype, unsigned char *data, size_t dlen) | |
1037 | { | |
1038 | return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen); | |
1039 | } | |
1040 | ||
1041 | int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype, | |
1042 | uint8_t ord) | |
1043 | { | |
1044 | return dane_mtype_set(&ctx->dane, md, mtype, ord); | |
1045 | } | |
1046 | ||
1047 | int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) | |
1048 | { | |
1049 | return X509_VERIFY_PARAM_set1(ctx->param, vpm); | |
1050 | } | |
1051 | ||
1052 | int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) | |
1053 | { | |
1054 | return X509_VERIFY_PARAM_set1(ssl->param, vpm); | |
1055 | } | |
1056 | ||
1057 | X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx) | |
1058 | { | |
1059 | return ctx->param; | |
1060 | } | |
1061 | ||
1062 | X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl) | |
1063 | { | |
1064 | return ssl->param; | |
1065 | } | |
1066 | ||
1067 | void SSL_certs_clear(SSL *s) | |
1068 | { | |
1069 | ssl_cert_clear_certs(s->cert); | |
1070 | } | |
1071 | ||
1072 | void SSL_free(SSL *s) | |
1073 | { | |
1074 | int i; | |
1075 | ||
1076 | if (s == NULL) | |
1077 | return; | |
1078 | ||
1079 | CRYPTO_DOWN_REF(&s->references, &i, s->lock); | |
1080 | REF_PRINT_COUNT("SSL", s); | |
1081 | if (i > 0) | |
1082 | return; | |
1083 | REF_ASSERT_ISNT(i < 0); | |
1084 | ||
1085 | X509_VERIFY_PARAM_free(s->param); | |
1086 | dane_final(&s->dane); | |
1087 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); | |
1088 | ||
1089 | /* Ignore return value */ | |
1090 | ssl_free_wbio_buffer(s); | |
1091 | ||
1092 | BIO_free_all(s->wbio); | |
1093 | BIO_free_all(s->rbio); | |
1094 | ||
1095 | BUF_MEM_free(s->init_buf); | |
1096 | ||
1097 | /* add extra stuff */ | |
1098 | sk_SSL_CIPHER_free(s->cipher_list); | |
1099 | sk_SSL_CIPHER_free(s->cipher_list_by_id); | |
1100 | ||
1101 | /* Make the next call work :-) */ | |
1102 | if (s->session != NULL) { | |
1103 | ssl_clear_bad_session(s); | |
1104 | SSL_SESSION_free(s->session); | |
1105 | } | |
1106 | SSL_SESSION_free(s->psksession); | |
1107 | OPENSSL_free(s->psksession_id); | |
1108 | ||
1109 | clear_ciphers(s); | |
1110 | ||
1111 | ssl_cert_free(s->cert); | |
1112 | /* Free up if allocated */ | |
1113 | ||
1114 | OPENSSL_free(s->ext.hostname); | |
1115 | SSL_CTX_free(s->session_ctx); | |
1116 | #ifndef OPENSSL_NO_EC | |
1117 | OPENSSL_free(s->ext.ecpointformats); | |
1118 | OPENSSL_free(s->ext.supportedgroups); | |
1119 | #endif /* OPENSSL_NO_EC */ | |
1120 | sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free); | |
1121 | #ifndef OPENSSL_NO_OCSP | |
1122 | sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); | |
1123 | #endif | |
1124 | #ifndef OPENSSL_NO_CT | |
1125 | SCT_LIST_free(s->scts); | |
1126 | OPENSSL_free(s->ext.scts); | |
1127 | #endif | |
1128 | OPENSSL_free(s->ext.ocsp.resp); | |
1129 | OPENSSL_free(s->ext.alpn); | |
1130 | OPENSSL_free(s->ext.tls13_cookie); | |
1131 | OPENSSL_free(s->clienthello); | |
1132 | ||
1133 | sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free); | |
1134 | ||
1135 | sk_X509_pop_free(s->verified_chain, X509_free); | |
1136 | ||
1137 | if (s->method != NULL) | |
1138 | s->method->ssl_free(s); | |
1139 | ||
1140 | RECORD_LAYER_release(&s->rlayer); | |
1141 | ||
1142 | SSL_CTX_free(s->ctx); | |
1143 | ||
1144 | ASYNC_WAIT_CTX_free(s->waitctx); | |
1145 | ||
1146 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
1147 | OPENSSL_free(s->ext.npn); | |
1148 | #endif | |
1149 | ||
1150 | #ifndef OPENSSL_NO_SRTP | |
1151 | sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles); | |
1152 | #endif | |
1153 | ||
1154 | RAND_DRBG_free(s->drbg); | |
1155 | CRYPTO_THREAD_lock_free(s->lock); | |
1156 | ||
1157 | OPENSSL_free(s); | |
1158 | } | |
1159 | ||
1160 | void SSL_set0_rbio(SSL *s, BIO *rbio) | |
1161 | { | |
1162 | BIO_free_all(s->rbio); | |
1163 | s->rbio = rbio; | |
1164 | } | |
1165 | ||
1166 | void SSL_set0_wbio(SSL *s, BIO *wbio) | |
1167 | { | |
1168 | /* | |
1169 | * If the output buffering BIO is still in place, remove it | |
1170 | */ | |
1171 | if (s->bbio != NULL) | |
1172 | s->wbio = BIO_pop(s->wbio); | |
1173 | ||
1174 | BIO_free_all(s->wbio); | |
1175 | s->wbio = wbio; | |
1176 | ||
1177 | /* Re-attach |bbio| to the new |wbio|. */ | |
1178 | if (s->bbio != NULL) | |
1179 | s->wbio = BIO_push(s->bbio, s->wbio); | |
1180 | } | |
1181 | ||
1182 | void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) | |
1183 | { | |
1184 | /* | |
1185 | * For historical reasons, this function has many different cases in | |
1186 | * ownership handling. | |
1187 | */ | |
1188 | ||
1189 | /* If nothing has changed, do nothing */ | |
1190 | if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s)) | |
1191 | return; | |
1192 | ||
1193 | /* | |
1194 | * If the two arguments are equal then one fewer reference is granted by the | |
1195 | * caller than we want to take | |
1196 | */ | |
1197 | if (rbio != NULL && rbio == wbio) | |
1198 | BIO_up_ref(rbio); | |
1199 | ||
1200 | /* | |
1201 | * If only the wbio is changed only adopt one reference. | |
1202 | */ | |
1203 | if (rbio == SSL_get_rbio(s)) { | |
1204 | SSL_set0_wbio(s, wbio); | |
1205 | return; | |
1206 | } | |
1207 | /* | |
1208 | * There is an asymmetry here for historical reasons. If only the rbio is | |
1209 | * changed AND the rbio and wbio were originally different, then we only | |
1210 | * adopt one reference. | |
1211 | */ | |
1212 | if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) { | |
1213 | SSL_set0_rbio(s, rbio); | |
1214 | return; | |
1215 | } | |
1216 | ||
1217 | /* Otherwise, adopt both references. */ | |
1218 | SSL_set0_rbio(s, rbio); | |
1219 | SSL_set0_wbio(s, wbio); | |
1220 | } | |
1221 | ||
1222 | BIO *SSL_get_rbio(const SSL *s) | |
1223 | { | |
1224 | return s->rbio; | |
1225 | } | |
1226 | ||
1227 | BIO *SSL_get_wbio(const SSL *s) | |
1228 | { | |
1229 | if (s->bbio != NULL) { | |
1230 | /* | |
1231 | * If |bbio| is active, the true caller-configured BIO is its | |
1232 | * |next_bio|. | |
1233 | */ | |
1234 | return BIO_next(s->bbio); | |
1235 | } | |
1236 | return s->wbio; | |
1237 | } | |
1238 | ||
1239 | int SSL_get_fd(const SSL *s) | |
1240 | { | |
1241 | return SSL_get_rfd(s); | |
1242 | } | |
1243 | ||
1244 | int SSL_get_rfd(const SSL *s) | |
1245 | { | |
1246 | int ret = -1; | |
1247 | BIO *b, *r; | |
1248 | ||
1249 | b = SSL_get_rbio(s); | |
1250 | r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); | |
1251 | if (r != NULL) | |
1252 | BIO_get_fd(r, &ret); | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | int SSL_get_wfd(const SSL *s) | |
1257 | { | |
1258 | int ret = -1; | |
1259 | BIO *b, *r; | |
1260 | ||
1261 | b = SSL_get_wbio(s); | |
1262 | r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); | |
1263 | if (r != NULL) | |
1264 | BIO_get_fd(r, &ret); | |
1265 | return ret; | |
1266 | } | |
1267 | ||
1268 | #ifndef OPENSSL_NO_SOCK | |
1269 | int SSL_set_fd(SSL *s, int fd) | |
1270 | { | |
1271 | int ret = 0; | |
1272 | BIO *bio = NULL; | |
1273 | ||
1274 | bio = BIO_new(BIO_s_socket()); | |
1275 | ||
1276 | if (bio == NULL) { | |
1277 | SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB); | |
1278 | goto err; | |
1279 | } | |
1280 | BIO_set_fd(bio, fd, BIO_NOCLOSE); | |
1281 | SSL_set_bio(s, bio, bio); | |
1282 | ret = 1; | |
1283 | err: | |
1284 | return ret; | |
1285 | } | |
1286 | ||
1287 | int SSL_set_wfd(SSL *s, int fd) | |
1288 | { | |
1289 | BIO *rbio = SSL_get_rbio(s); | |
1290 | ||
1291 | if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET | |
1292 | || (int)BIO_get_fd(rbio, NULL) != fd) { | |
1293 | BIO *bio = BIO_new(BIO_s_socket()); | |
1294 | ||
1295 | if (bio == NULL) { | |
1296 | SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB); | |
1297 | return 0; | |
1298 | } | |
1299 | BIO_set_fd(bio, fd, BIO_NOCLOSE); | |
1300 | SSL_set0_wbio(s, bio); | |
1301 | } else { | |
1302 | BIO_up_ref(rbio); | |
1303 | SSL_set0_wbio(s, rbio); | |
1304 | } | |
1305 | return 1; | |
1306 | } | |
1307 | ||
1308 | int SSL_set_rfd(SSL *s, int fd) | |
1309 | { | |
1310 | BIO *wbio = SSL_get_wbio(s); | |
1311 | ||
1312 | if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET | |
1313 | || ((int)BIO_get_fd(wbio, NULL) != fd)) { | |
1314 | BIO *bio = BIO_new(BIO_s_socket()); | |
1315 | ||
1316 | if (bio == NULL) { | |
1317 | SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB); | |
1318 | return 0; | |
1319 | } | |
1320 | BIO_set_fd(bio, fd, BIO_NOCLOSE); | |
1321 | SSL_set0_rbio(s, bio); | |
1322 | } else { | |
1323 | BIO_up_ref(wbio); | |
1324 | SSL_set0_rbio(s, wbio); | |
1325 | } | |
1326 | ||
1327 | return 1; | |
1328 | } | |
1329 | #endif | |
1330 | ||
1331 | /* return length of latest Finished message we sent, copy to 'buf' */ | |
1332 | size_t SSL_get_finished(const SSL *s, void *buf, size_t count) | |
1333 | { | |
1334 | size_t ret = 0; | |
1335 | ||
1336 | if (s->s3 != NULL) { | |
1337 | ret = s->s3->tmp.finish_md_len; | |
1338 | if (count > ret) | |
1339 | count = ret; | |
1340 | memcpy(buf, s->s3->tmp.finish_md, count); | |
1341 | } | |
1342 | return ret; | |
1343 | } | |
1344 | ||
1345 | /* return length of latest Finished message we expected, copy to 'buf' */ | |
1346 | size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count) | |
1347 | { | |
1348 | size_t ret = 0; | |
1349 | ||
1350 | if (s->s3 != NULL) { | |
1351 | ret = s->s3->tmp.peer_finish_md_len; | |
1352 | if (count > ret) | |
1353 | count = ret; | |
1354 | memcpy(buf, s->s3->tmp.peer_finish_md, count); | |
1355 | } | |
1356 | return ret; | |
1357 | } | |
1358 | ||
1359 | int SSL_get_verify_mode(const SSL *s) | |
1360 | { | |
1361 | return s->verify_mode; | |
1362 | } | |
1363 | ||
1364 | int SSL_get_verify_depth(const SSL *s) | |
1365 | { | |
1366 | return X509_VERIFY_PARAM_get_depth(s->param); | |
1367 | } | |
1368 | ||
1369 | int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) { | |
1370 | return s->verify_callback; | |
1371 | } | |
1372 | ||
1373 | int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) | |
1374 | { | |
1375 | return ctx->verify_mode; | |
1376 | } | |
1377 | ||
1378 | int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) | |
1379 | { | |
1380 | return X509_VERIFY_PARAM_get_depth(ctx->param); | |
1381 | } | |
1382 | ||
1383 | int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) { | |
1384 | return ctx->default_verify_callback; | |
1385 | } | |
1386 | ||
1387 | void SSL_set_verify(SSL *s, int mode, | |
1388 | int (*callback) (int ok, X509_STORE_CTX *ctx)) | |
1389 | { | |
1390 | s->verify_mode = mode; | |
1391 | if (callback != NULL) | |
1392 | s->verify_callback = callback; | |
1393 | } | |
1394 | ||
1395 | void SSL_set_verify_depth(SSL *s, int depth) | |
1396 | { | |
1397 | X509_VERIFY_PARAM_set_depth(s->param, depth); | |
1398 | } | |
1399 | ||
1400 | void SSL_set_read_ahead(SSL *s, int yes) | |
1401 | { | |
1402 | RECORD_LAYER_set_read_ahead(&s->rlayer, yes); | |
1403 | } | |
1404 | ||
1405 | int SSL_get_read_ahead(const SSL *s) | |
1406 | { | |
1407 | return RECORD_LAYER_get_read_ahead(&s->rlayer); | |
1408 | } | |
1409 | ||
1410 | int SSL_pending(const SSL *s) | |
1411 | { | |
1412 | size_t pending = s->method->ssl_pending(s); | |
1413 | ||
1414 | /* | |
1415 | * SSL_pending cannot work properly if read-ahead is enabled | |
1416 | * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is | |
1417 | * impossible to fix since SSL_pending cannot report errors that may be | |
1418 | * observed while scanning the new data. (Note that SSL_pending() is | |
1419 | * often used as a boolean value, so we'd better not return -1.) | |
1420 | * | |
1421 | * SSL_pending also cannot work properly if the value >INT_MAX. In that case | |
1422 | * we just return INT_MAX. | |
1423 | */ | |
1424 | return pending < INT_MAX ? (int)pending : INT_MAX; | |
1425 | } | |
1426 | ||
1427 | int SSL_has_pending(const SSL *s) | |
1428 | { | |
1429 | /* | |
1430 | * Similar to SSL_pending() but returns a 1 to indicate that we have | |
1431 | * unprocessed data available or 0 otherwise (as opposed to the number of | |
1432 | * bytes available). Unlike SSL_pending() this will take into account | |
1433 | * read_ahead data. A 1 return simply indicates that we have unprocessed | |
1434 | * data. That data may not result in any application data, or we may fail | |
1435 | * to parse the records for some reason. | |
1436 | */ | |
1437 | if (RECORD_LAYER_processed_read_pending(&s->rlayer)) | |
1438 | return 1; | |
1439 | ||
1440 | return RECORD_LAYER_read_pending(&s->rlayer); | |
1441 | } | |
1442 | ||
1443 | X509 *SSL_get_peer_certificate(const SSL *s) | |
1444 | { | |
1445 | X509 *r; | |
1446 | ||
1447 | if ((s == NULL) || (s->session == NULL)) | |
1448 | r = NULL; | |
1449 | else | |
1450 | r = s->session->peer; | |
1451 | ||
1452 | if (r == NULL) | |
1453 | return r; | |
1454 | ||
1455 | X509_up_ref(r); | |
1456 | ||
1457 | return r; | |
1458 | } | |
1459 | ||
1460 | STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s) | |
1461 | { | |
1462 | STACK_OF(X509) *r; | |
1463 | ||
1464 | if ((s == NULL) || (s->session == NULL)) | |
1465 | r = NULL; | |
1466 | else | |
1467 | r = s->session->peer_chain; | |
1468 | ||
1469 | /* | |
1470 | * If we are a client, cert_chain includes the peer's own certificate; if | |
1471 | * we are a server, it does not. | |
1472 | */ | |
1473 | ||
1474 | return r; | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * Now in theory, since the calling process own 't' it should be safe to | |
1479 | * modify. We need to be able to read f without being hassled | |
1480 | */ | |
1481 | int SSL_copy_session_id(SSL *t, const SSL *f) | |
1482 | { | |
1483 | int i; | |
1484 | /* Do we need to to SSL locking? */ | |
1485 | if (!SSL_set_session(t, SSL_get_session(f))) { | |
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * what if we are setup for one protocol version but want to talk another | |
1491 | */ | |
1492 | if (t->method != f->method) { | |
1493 | t->method->ssl_free(t); | |
1494 | t->method = f->method; | |
1495 | if (t->method->ssl_new(t) == 0) | |
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock); | |
1500 | ssl_cert_free(t->cert); | |
1501 | t->cert = f->cert; | |
1502 | if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) { | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | return 1; | |
1507 | } | |
1508 | ||
1509 | /* Fix this so it checks all the valid key/cert options */ | |
1510 | int SSL_CTX_check_private_key(const SSL_CTX *ctx) | |
1511 | { | |
1512 | if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) { | |
1513 | SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); | |
1514 | return 0; | |
1515 | } | |
1516 | if (ctx->cert->key->privatekey == NULL) { | |
1517 | SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED); | |
1518 | return 0; | |
1519 | } | |
1520 | return X509_check_private_key | |
1521 | (ctx->cert->key->x509, ctx->cert->key->privatekey); | |
1522 | } | |
1523 | ||
1524 | /* Fix this function so that it takes an optional type parameter */ | |
1525 | int SSL_check_private_key(const SSL *ssl) | |
1526 | { | |
1527 | if (ssl == NULL) { | |
1528 | SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER); | |
1529 | return 0; | |
1530 | } | |
1531 | if (ssl->cert->key->x509 == NULL) { | |
1532 | SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); | |
1533 | return 0; | |
1534 | } | |
1535 | if (ssl->cert->key->privatekey == NULL) { | |
1536 | SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED); | |
1537 | return 0; | |
1538 | } | |
1539 | return X509_check_private_key(ssl->cert->key->x509, | |
1540 | ssl->cert->key->privatekey); | |
1541 | } | |
1542 | ||
1543 | int SSL_waiting_for_async(SSL *s) | |
1544 | { | |
1545 | if (s->job) | |
1546 | return 1; | |
1547 | ||
1548 | return 0; | |
1549 | } | |
1550 | ||
1551 | int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds) | |
1552 | { | |
1553 | ASYNC_WAIT_CTX *ctx = s->waitctx; | |
1554 | ||
1555 | if (ctx == NULL) | |
1556 | return 0; | |
1557 | return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds); | |
1558 | } | |
1559 | ||
1560 | int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds, | |
1561 | OSSL_ASYNC_FD *delfd, size_t *numdelfds) | |
1562 | { | |
1563 | ASYNC_WAIT_CTX *ctx = s->waitctx; | |
1564 | ||
1565 | if (ctx == NULL) | |
1566 | return 0; | |
1567 | return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd, | |
1568 | numdelfds); | |
1569 | } | |
1570 | ||
1571 | int SSL_accept(SSL *s) | |
1572 | { | |
1573 | if (s->handshake_func == NULL) { | |
1574 | /* Not properly initialized yet */ | |
1575 | SSL_set_accept_state(s); | |
1576 | } | |
1577 | ||
1578 | return SSL_do_handshake(s); | |
1579 | } | |
1580 | ||
1581 | int SSL_connect(SSL *s) | |
1582 | { | |
1583 | if (s->handshake_func == NULL) { | |
1584 | /* Not properly initialized yet */ | |
1585 | SSL_set_connect_state(s); | |
1586 | } | |
1587 | ||
1588 | return SSL_do_handshake(s); | |
1589 | } | |
1590 | ||
1591 | long SSL_get_default_timeout(const SSL *s) | |
1592 | { | |
1593 | return s->method->get_timeout(); | |
1594 | } | |
1595 | ||
1596 | static int ssl_start_async_job(SSL *s, struct ssl_async_args *args, | |
1597 | int (*func) (void *)) | |
1598 | { | |
1599 | int ret; | |
1600 | if (s->waitctx == NULL) { | |
1601 | s->waitctx = ASYNC_WAIT_CTX_new(); | |
1602 | if (s->waitctx == NULL) | |
1603 | return -1; | |
1604 | } | |
1605 | switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args, | |
1606 | sizeof(struct ssl_async_args))) { | |
1607 | case ASYNC_ERR: | |
1608 | s->rwstate = SSL_NOTHING; | |
1609 | SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC); | |
1610 | return -1; | |
1611 | case ASYNC_PAUSE: | |
1612 | s->rwstate = SSL_ASYNC_PAUSED; | |
1613 | return -1; | |
1614 | case ASYNC_NO_JOBS: | |
1615 | s->rwstate = SSL_ASYNC_NO_JOBS; | |
1616 | return -1; | |
1617 | case ASYNC_FINISH: | |
1618 | s->job = NULL; | |
1619 | return ret; | |
1620 | default: | |
1621 | s->rwstate = SSL_NOTHING; | |
1622 | SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR); | |
1623 | /* Shouldn't happen */ | |
1624 | return -1; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | static int ssl_io_intern(void *vargs) | |
1629 | { | |
1630 | struct ssl_async_args *args; | |
1631 | SSL *s; | |
1632 | void *buf; | |
1633 | size_t num; | |
1634 | ||
1635 | args = (struct ssl_async_args *)vargs; | |
1636 | s = args->s; | |
1637 | buf = args->buf; | |
1638 | num = args->num; | |
1639 | switch (args->type) { | |
1640 | case READFUNC: | |
1641 | return args->f.func_read(s, buf, num, &s->asyncrw); | |
1642 | case WRITEFUNC: | |
1643 | return args->f.func_write(s, buf, num, &s->asyncrw); | |
1644 | case OTHERFUNC: | |
1645 | return args->f.func_other(s); | |
1646 | } | |
1647 | return -1; | |
1648 | } | |
1649 | ||
1650 | int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes) | |
1651 | { | |
1652 | if (s->handshake_func == NULL) { | |
1653 | SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED); | |
1654 | return -1; | |
1655 | } | |
1656 | ||
1657 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
1658 | s->rwstate = SSL_NOTHING; | |
1659 | return 0; | |
1660 | } | |
1661 | ||
1662 | if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY | |
1663 | || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) { | |
1664 | SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1665 | return 0; | |
1666 | } | |
1667 | /* | |
1668 | * If we are a client and haven't received the ServerHello etc then we | |
1669 | * better do that | |
1670 | */ | |
1671 | ossl_statem_check_finish_init(s, 0); | |
1672 | ||
1673 | if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { | |
1674 | struct ssl_async_args args; | |
1675 | int ret; | |
1676 | ||
1677 | args.s = s; | |
1678 | args.buf = buf; | |
1679 | args.num = num; | |
1680 | args.type = READFUNC; | |
1681 | args.f.func_read = s->method->ssl_read; | |
1682 | ||
1683 | ret = ssl_start_async_job(s, &args, ssl_io_intern); | |
1684 | *readbytes = s->asyncrw; | |
1685 | return ret; | |
1686 | } else { | |
1687 | return s->method->ssl_read(s, buf, num, readbytes); | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | int SSL_read(SSL *s, void *buf, int num) | |
1692 | { | |
1693 | int ret; | |
1694 | size_t readbytes; | |
1695 | ||
1696 | if (num < 0) { | |
1697 | SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH); | |
1698 | return -1; | |
1699 | } | |
1700 | ||
1701 | ret = ssl_read_internal(s, buf, (size_t)num, &readbytes); | |
1702 | ||
1703 | /* | |
1704 | * The cast is safe here because ret should be <= INT_MAX because num is | |
1705 | * <= INT_MAX | |
1706 | */ | |
1707 | if (ret > 0) | |
1708 | ret = (int)readbytes; | |
1709 | ||
1710 | return ret; | |
1711 | } | |
1712 | ||
1713 | int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes) | |
1714 | { | |
1715 | int ret = ssl_read_internal(s, buf, num, readbytes); | |
1716 | ||
1717 | if (ret < 0) | |
1718 | ret = 0; | |
1719 | return ret; | |
1720 | } | |
1721 | ||
1722 | int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes) | |
1723 | { | |
1724 | int ret; | |
1725 | ||
1726 | if (!s->server) { | |
1727 | SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1728 | return SSL_READ_EARLY_DATA_ERROR; | |
1729 | } | |
1730 | ||
1731 | switch (s->early_data_state) { | |
1732 | case SSL_EARLY_DATA_NONE: | |
1733 | if (!SSL_in_before(s)) { | |
1734 | SSLerr(SSL_F_SSL_READ_EARLY_DATA, | |
1735 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1736 | return SSL_READ_EARLY_DATA_ERROR; | |
1737 | } | |
1738 | /* fall through */ | |
1739 | ||
1740 | case SSL_EARLY_DATA_ACCEPT_RETRY: | |
1741 | s->early_data_state = SSL_EARLY_DATA_ACCEPTING; | |
1742 | ret = SSL_accept(s); | |
1743 | if (ret <= 0) { | |
1744 | /* NBIO or error */ | |
1745 | s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY; | |
1746 | return SSL_READ_EARLY_DATA_ERROR; | |
1747 | } | |
1748 | /* fall through */ | |
1749 | ||
1750 | case SSL_EARLY_DATA_READ_RETRY: | |
1751 | if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { | |
1752 | s->early_data_state = SSL_EARLY_DATA_READING; | |
1753 | ret = SSL_read_ex(s, buf, num, readbytes); | |
1754 | /* | |
1755 | * State machine will update early_data_state to | |
1756 | * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData | |
1757 | * message | |
1758 | */ | |
1759 | if (ret > 0 || (ret <= 0 && s->early_data_state | |
1760 | != SSL_EARLY_DATA_FINISHED_READING)) { | |
1761 | s->early_data_state = SSL_EARLY_DATA_READ_RETRY; | |
1762 | return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS | |
1763 | : SSL_READ_EARLY_DATA_ERROR; | |
1764 | } | |
1765 | } else { | |
1766 | s->early_data_state = SSL_EARLY_DATA_FINISHED_READING; | |
1767 | } | |
1768 | *readbytes = 0; | |
1769 | return SSL_READ_EARLY_DATA_FINISH; | |
1770 | ||
1771 | default: | |
1772 | SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1773 | return SSL_READ_EARLY_DATA_ERROR; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | int SSL_get_early_data_status(const SSL *s) | |
1778 | { | |
1779 | return s->ext.early_data; | |
1780 | } | |
1781 | ||
1782 | static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes) | |
1783 | { | |
1784 | if (s->handshake_func == NULL) { | |
1785 | SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED); | |
1786 | return -1; | |
1787 | } | |
1788 | ||
1789 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
1790 | return 0; | |
1791 | } | |
1792 | if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { | |
1793 | struct ssl_async_args args; | |
1794 | int ret; | |
1795 | ||
1796 | args.s = s; | |
1797 | args.buf = buf; | |
1798 | args.num = num; | |
1799 | args.type = READFUNC; | |
1800 | args.f.func_read = s->method->ssl_peek; | |
1801 | ||
1802 | ret = ssl_start_async_job(s, &args, ssl_io_intern); | |
1803 | *readbytes = s->asyncrw; | |
1804 | return ret; | |
1805 | } else { | |
1806 | return s->method->ssl_peek(s, buf, num, readbytes); | |
1807 | } | |
1808 | } | |
1809 | ||
1810 | int SSL_peek(SSL *s, void *buf, int num) | |
1811 | { | |
1812 | int ret; | |
1813 | size_t readbytes; | |
1814 | ||
1815 | if (num < 0) { | |
1816 | SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH); | |
1817 | return -1; | |
1818 | } | |
1819 | ||
1820 | ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes); | |
1821 | ||
1822 | /* | |
1823 | * The cast is safe here because ret should be <= INT_MAX because num is | |
1824 | * <= INT_MAX | |
1825 | */ | |
1826 | if (ret > 0) | |
1827 | ret = (int)readbytes; | |
1828 | ||
1829 | return ret; | |
1830 | } | |
1831 | ||
1832 | ||
1833 | int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes) | |
1834 | { | |
1835 | int ret = ssl_peek_internal(s, buf, num, readbytes); | |
1836 | ||
1837 | if (ret < 0) | |
1838 | ret = 0; | |
1839 | return ret; | |
1840 | } | |
1841 | ||
1842 | int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written) | |
1843 | { | |
1844 | if (s->handshake_func == NULL) { | |
1845 | SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED); | |
1846 | return -1; | |
1847 | } | |
1848 | ||
1849 | if (s->shutdown & SSL_SENT_SHUTDOWN) { | |
1850 | s->rwstate = SSL_NOTHING; | |
1851 | SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN); | |
1852 | return -1; | |
1853 | } | |
1854 | ||
1855 | if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY | |
1856 | || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY | |
1857 | || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) { | |
1858 | SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1859 | return 0; | |
1860 | } | |
1861 | /* If we are a client and haven't sent the Finished we better do that */ | |
1862 | ossl_statem_check_finish_init(s, 1); | |
1863 | ||
1864 | if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { | |
1865 | int ret; | |
1866 | struct ssl_async_args args; | |
1867 | ||
1868 | args.s = s; | |
1869 | args.buf = (void *)buf; | |
1870 | args.num = num; | |
1871 | args.type = WRITEFUNC; | |
1872 | args.f.func_write = s->method->ssl_write; | |
1873 | ||
1874 | ret = ssl_start_async_job(s, &args, ssl_io_intern); | |
1875 | *written = s->asyncrw; | |
1876 | return ret; | |
1877 | } else { | |
1878 | return s->method->ssl_write(s, buf, num, written); | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | int SSL_write(SSL *s, const void *buf, int num) | |
1883 | { | |
1884 | int ret; | |
1885 | size_t written; | |
1886 | ||
1887 | if (num < 0) { | |
1888 | SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH); | |
1889 | return -1; | |
1890 | } | |
1891 | ||
1892 | ret = ssl_write_internal(s, buf, (size_t)num, &written); | |
1893 | ||
1894 | /* | |
1895 | * The cast is safe here because ret should be <= INT_MAX because num is | |
1896 | * <= INT_MAX | |
1897 | */ | |
1898 | if (ret > 0) | |
1899 | ret = (int)written; | |
1900 | ||
1901 | return ret; | |
1902 | } | |
1903 | ||
1904 | int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written) | |
1905 | { | |
1906 | int ret = ssl_write_internal(s, buf, num, written); | |
1907 | ||
1908 | if (ret < 0) | |
1909 | ret = 0; | |
1910 | return ret; | |
1911 | } | |
1912 | ||
1913 | int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written) | |
1914 | { | |
1915 | int ret, early_data_state; | |
1916 | ||
1917 | switch (s->early_data_state) { | |
1918 | case SSL_EARLY_DATA_NONE: | |
1919 | if (s->server | |
1920 | || !SSL_in_before(s) | |
1921 | || ((s->session == NULL || s->session->ext.max_early_data == 0) | |
1922 | && (s->psk_use_session_cb == NULL))) { | |
1923 | SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, | |
1924 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1925 | return 0; | |
1926 | } | |
1927 | /* fall through */ | |
1928 | ||
1929 | case SSL_EARLY_DATA_CONNECT_RETRY: | |
1930 | s->early_data_state = SSL_EARLY_DATA_CONNECTING; | |
1931 | ret = SSL_connect(s); | |
1932 | if (ret <= 0) { | |
1933 | /* NBIO or error */ | |
1934 | s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY; | |
1935 | return 0; | |
1936 | } | |
1937 | /* fall through */ | |
1938 | ||
1939 | case SSL_EARLY_DATA_WRITE_RETRY: | |
1940 | s->early_data_state = SSL_EARLY_DATA_WRITING; | |
1941 | ret = SSL_write_ex(s, buf, num, written); | |
1942 | s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY; | |
1943 | return ret; | |
1944 | ||
1945 | case SSL_EARLY_DATA_FINISHED_READING: | |
1946 | case SSL_EARLY_DATA_READ_RETRY: | |
1947 | early_data_state = s->early_data_state; | |
1948 | /* We are a server writing to an unauthenticated client */ | |
1949 | s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING; | |
1950 | ret = SSL_write_ex(s, buf, num, written); | |
1951 | s->early_data_state = early_data_state; | |
1952 | return ret; | |
1953 | ||
1954 | default: | |
1955 | SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1956 | return 0; | |
1957 | } | |
1958 | } | |
1959 | ||
1960 | int SSL_shutdown(SSL *s) | |
1961 | { | |
1962 | /* | |
1963 | * Note that this function behaves differently from what one might | |
1964 | * expect. Return values are 0 for no success (yet), 1 for success; but | |
1965 | * calling it once is usually not enough, even if blocking I/O is used | |
1966 | * (see ssl3_shutdown). | |
1967 | */ | |
1968 | ||
1969 | if (s->handshake_func == NULL) { | |
1970 | SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); | |
1971 | return -1; | |
1972 | } | |
1973 | ||
1974 | if (!SSL_in_init(s)) { | |
1975 | if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { | |
1976 | struct ssl_async_args args; | |
1977 | ||
1978 | args.s = s; | |
1979 | args.type = OTHERFUNC; | |
1980 | args.f.func_other = s->method->ssl_shutdown; | |
1981 | ||
1982 | return ssl_start_async_job(s, &args, ssl_io_intern); | |
1983 | } else { | |
1984 | return s->method->ssl_shutdown(s); | |
1985 | } | |
1986 | } else { | |
1987 | SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT); | |
1988 | return -1; | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | int SSL_key_update(SSL *s, int updatetype) | |
1993 | { | |
1994 | /* | |
1995 | * TODO(TLS1.3): How will applications know whether TLSv1.3 has been | |
1996 | * negotiated, and that it is appropriate to call SSL_key_update() instead | |
1997 | * of SSL_renegotiate(). | |
1998 | */ | |
1999 | if (!SSL_IS_TLS13(s)) { | |
2000 | SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION); | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED | |
2005 | && updatetype != SSL_KEY_UPDATE_REQUESTED) { | |
2006 | SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE); | |
2007 | return 0; | |
2008 | } | |
2009 | ||
2010 | if (!SSL_is_init_finished(s)) { | |
2011 | SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT); | |
2012 | return 0; | |
2013 | } | |
2014 | ||
2015 | ossl_statem_set_in_init(s, 1); | |
2016 | s->key_update = updatetype; | |
2017 | return 1; | |
2018 | } | |
2019 | ||
2020 | int SSL_get_key_update_type(SSL *s) | |
2021 | { | |
2022 | return s->key_update; | |
2023 | } | |
2024 | ||
2025 | int SSL_renegotiate(SSL *s) | |
2026 | { | |
2027 | if (SSL_IS_TLS13(s)) { | |
2028 | SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION); | |
2029 | return 0; | |
2030 | } | |
2031 | ||
2032 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { | |
2033 | SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION); | |
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | s->renegotiate = 1; | |
2038 | s->new_session = 1; | |
2039 | ||
2040 | return s->method->ssl_renegotiate(s); | |
2041 | } | |
2042 | ||
2043 | int SSL_renegotiate_abbreviated(SSL *s) | |
2044 | { | |
2045 | if (SSL_IS_TLS13(s)) { | |
2046 | SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION); | |
2047 | return 0; | |
2048 | } | |
2049 | ||
2050 | if ((s->options & SSL_OP_NO_RENEGOTIATION)) { | |
2051 | SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION); | |
2052 | return 0; | |
2053 | } | |
2054 | ||
2055 | s->renegotiate = 1; | |
2056 | s->new_session = 0; | |
2057 | ||
2058 | return s->method->ssl_renegotiate(s); | |
2059 | } | |
2060 | ||
2061 | int SSL_renegotiate_pending(SSL *s) | |
2062 | { | |
2063 | /* | |
2064 | * becomes true when negotiation is requested; false again once a | |
2065 | * handshake has finished | |
2066 | */ | |
2067 | return (s->renegotiate != 0); | |
2068 | } | |
2069 | ||
2070 | long SSL_ctrl(SSL *s, int cmd, long larg, void *parg) | |
2071 | { | |
2072 | long l; | |
2073 | ||
2074 | switch (cmd) { | |
2075 | case SSL_CTRL_GET_READ_AHEAD: | |
2076 | return RECORD_LAYER_get_read_ahead(&s->rlayer); | |
2077 | case SSL_CTRL_SET_READ_AHEAD: | |
2078 | l = RECORD_LAYER_get_read_ahead(&s->rlayer); | |
2079 | RECORD_LAYER_set_read_ahead(&s->rlayer, larg); | |
2080 | return l; | |
2081 | ||
2082 | case SSL_CTRL_SET_MSG_CALLBACK_ARG: | |
2083 | s->msg_callback_arg = parg; | |
2084 | return 1; | |
2085 | ||
2086 | case SSL_CTRL_MODE: | |
2087 | return (s->mode |= larg); | |
2088 | case SSL_CTRL_CLEAR_MODE: | |
2089 | return (s->mode &= ~larg); | |
2090 | case SSL_CTRL_GET_MAX_CERT_LIST: | |
2091 | return (long)s->max_cert_list; | |
2092 | case SSL_CTRL_SET_MAX_CERT_LIST: | |
2093 | if (larg < 0) | |
2094 | return 0; | |
2095 | l = (long)s->max_cert_list; | |
2096 | s->max_cert_list = (size_t)larg; | |
2097 | return l; | |
2098 | case SSL_CTRL_SET_MAX_SEND_FRAGMENT: | |
2099 | if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) | |
2100 | return 0; | |
2101 | s->max_send_fragment = larg; | |
2102 | if (s->max_send_fragment < s->split_send_fragment) | |
2103 | s->split_send_fragment = s->max_send_fragment; | |
2104 | return 1; | |
2105 | case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT: | |
2106 | if ((size_t)larg > s->max_send_fragment || larg == 0) | |
2107 | return 0; | |
2108 | s->split_send_fragment = larg; | |
2109 | return 1; | |
2110 | case SSL_CTRL_SET_MAX_PIPELINES: | |
2111 | if (larg < 1 || larg > SSL_MAX_PIPELINES) | |
2112 | return 0; | |
2113 | s->max_pipelines = larg; | |
2114 | if (larg > 1) | |
2115 | RECORD_LAYER_set_read_ahead(&s->rlayer, 1); | |
2116 | return 1; | |
2117 | case SSL_CTRL_GET_RI_SUPPORT: | |
2118 | if (s->s3) | |
2119 | return s->s3->send_connection_binding; | |
2120 | else | |
2121 | return 0; | |
2122 | case SSL_CTRL_CERT_FLAGS: | |
2123 | return (s->cert->cert_flags |= larg); | |
2124 | case SSL_CTRL_CLEAR_CERT_FLAGS: | |
2125 | return (s->cert->cert_flags &= ~larg); | |
2126 | ||
2127 | case SSL_CTRL_GET_RAW_CIPHERLIST: | |
2128 | if (parg) { | |
2129 | if (s->s3->tmp.ciphers_raw == NULL) | |
2130 | return 0; | |
2131 | *(unsigned char **)parg = s->s3->tmp.ciphers_raw; | |
2132 | return (int)s->s3->tmp.ciphers_rawlen; | |
2133 | } else { | |
2134 | return TLS_CIPHER_LEN; | |
2135 | } | |
2136 | case SSL_CTRL_GET_EXTMS_SUPPORT: | |
2137 | if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s)) | |
2138 | return -1; | |
2139 | if (s->session->flags & SSL_SESS_FLAG_EXTMS) | |
2140 | return 1; | |
2141 | else | |
2142 | return 0; | |
2143 | case SSL_CTRL_SET_MIN_PROTO_VERSION: | |
2144 | return ssl_check_allowed_versions(larg, s->max_proto_version) | |
2145 | && ssl_set_version_bound(s->ctx->method->version, (int)larg, | |
2146 | &s->min_proto_version); | |
2147 | case SSL_CTRL_GET_MIN_PROTO_VERSION: | |
2148 | return s->min_proto_version; | |
2149 | case SSL_CTRL_SET_MAX_PROTO_VERSION: | |
2150 | return ssl_check_allowed_versions(s->min_proto_version, larg) | |
2151 | && ssl_set_version_bound(s->ctx->method->version, (int)larg, | |
2152 | &s->max_proto_version); | |
2153 | case SSL_CTRL_GET_MAX_PROTO_VERSION: | |
2154 | return s->max_proto_version; | |
2155 | default: | |
2156 | return s->method->ssl_ctrl(s, cmd, larg, parg); | |
2157 | } | |
2158 | } | |
2159 | ||
2160 | long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void)) | |
2161 | { | |
2162 | switch (cmd) { | |
2163 | case SSL_CTRL_SET_MSG_CALLBACK: | |
2164 | s->msg_callback = (void (*) | |
2165 | (int write_p, int version, int content_type, | |
2166 | const void *buf, size_t len, SSL *ssl, | |
2167 | void *arg))(fp); | |
2168 | return 1; | |
2169 | ||
2170 | default: | |
2171 | return s->method->ssl_callback_ctrl(s, cmd, fp); | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx) | |
2176 | { | |
2177 | return ctx->sessions; | |
2178 | } | |
2179 | ||
2180 | long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) | |
2181 | { | |
2182 | long l; | |
2183 | int i; | |
2184 | /* For some cases with ctx == NULL perform syntax checks */ | |
2185 | if (ctx == NULL) { | |
2186 | switch (cmd) { | |
2187 | #ifndef OPENSSL_NO_EC | |
2188 | case SSL_CTRL_SET_GROUPS_LIST: | |
2189 | return tls1_set_groups_list(NULL, NULL, parg); | |
2190 | #endif | |
2191 | case SSL_CTRL_SET_SIGALGS_LIST: | |
2192 | case SSL_CTRL_SET_CLIENT_SIGALGS_LIST: | |
2193 | return tls1_set_sigalgs_list(NULL, parg, 0); | |
2194 | default: | |
2195 | return 0; | |
2196 | } | |
2197 | } | |
2198 | ||
2199 | switch (cmd) { | |
2200 | case SSL_CTRL_GET_READ_AHEAD: | |
2201 | return ctx->read_ahead; | |
2202 | case SSL_CTRL_SET_READ_AHEAD: | |
2203 | l = ctx->read_ahead; | |
2204 | ctx->read_ahead = larg; | |
2205 | return l; | |
2206 | ||
2207 | case SSL_CTRL_SET_MSG_CALLBACK_ARG: | |
2208 | ctx->msg_callback_arg = parg; | |
2209 | return 1; | |
2210 | ||
2211 | case SSL_CTRL_GET_MAX_CERT_LIST: | |
2212 | return (long)ctx->max_cert_list; | |
2213 | case SSL_CTRL_SET_MAX_CERT_LIST: | |
2214 | if (larg < 0) | |
2215 | return 0; | |
2216 | l = (long)ctx->max_cert_list; | |
2217 | ctx->max_cert_list = (size_t)larg; | |
2218 | return l; | |
2219 | ||
2220 | case SSL_CTRL_SET_SESS_CACHE_SIZE: | |
2221 | if (larg < 0) | |
2222 | return 0; | |
2223 | l = (long)ctx->session_cache_size; | |
2224 | ctx->session_cache_size = (size_t)larg; | |
2225 | return l; | |
2226 | case SSL_CTRL_GET_SESS_CACHE_SIZE: | |
2227 | return (long)ctx->session_cache_size; | |
2228 | case SSL_CTRL_SET_SESS_CACHE_MODE: | |
2229 | l = ctx->session_cache_mode; | |
2230 | ctx->session_cache_mode = larg; | |
2231 | return l; | |
2232 | case SSL_CTRL_GET_SESS_CACHE_MODE: | |
2233 | return ctx->session_cache_mode; | |
2234 | ||
2235 | case SSL_CTRL_SESS_NUMBER: | |
2236 | return lh_SSL_SESSION_num_items(ctx->sessions); | |
2237 | case SSL_CTRL_SESS_CONNECT: | |
2238 | return CRYPTO_atomic_read(&ctx->stats.sess_connect, &i, ctx->lock) | |
2239 | ? i : 0; | |
2240 | case SSL_CTRL_SESS_CONNECT_GOOD: | |
2241 | return CRYPTO_atomic_read(&ctx->stats.sess_connect_good, &i, ctx->lock) | |
2242 | ? i : 0; | |
2243 | case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: | |
2244 | return CRYPTO_atomic_read(&ctx->stats.sess_connect_renegotiate, &i, | |
2245 | ctx->lock) | |
2246 | ? i : 0; | |
2247 | case SSL_CTRL_SESS_ACCEPT: | |
2248 | return CRYPTO_atomic_read(&ctx->stats.sess_accept, &i, ctx->lock) | |
2249 | ? i : 0; | |
2250 | case SSL_CTRL_SESS_ACCEPT_GOOD: | |
2251 | return CRYPTO_atomic_read(&ctx->stats.sess_accept_good, &i, ctx->lock) | |
2252 | ? i : 0; | |
2253 | case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: | |
2254 | return CRYPTO_atomic_read(&ctx->stats.sess_accept_renegotiate, &i, | |
2255 | ctx->lock) | |
2256 | ? i : 0; | |
2257 | case SSL_CTRL_SESS_HIT: | |
2258 | return CRYPTO_atomic_read(&ctx->stats.sess_hit, &i, ctx->lock) | |
2259 | ? i : 0; | |
2260 | case SSL_CTRL_SESS_CB_HIT: | |
2261 | return CRYPTO_atomic_read(&ctx->stats.sess_cb_hit, &i, ctx->lock) | |
2262 | ? i : 0; | |
2263 | case SSL_CTRL_SESS_MISSES: | |
2264 | return CRYPTO_atomic_read(&ctx->stats.sess_miss, &i, ctx->lock) | |
2265 | ? i : 0; | |
2266 | case SSL_CTRL_SESS_TIMEOUTS: | |
2267 | return CRYPTO_atomic_read(&ctx->stats.sess_timeout, &i, ctx->lock) | |
2268 | ? i : 0; | |
2269 | case SSL_CTRL_SESS_CACHE_FULL: | |
2270 | return CRYPTO_atomic_read(&ctx->stats.sess_cache_full, &i, ctx->lock) | |
2271 | ? i : 0; | |
2272 | case SSL_CTRL_MODE: | |
2273 | return (ctx->mode |= larg); | |
2274 | case SSL_CTRL_CLEAR_MODE: | |
2275 | return (ctx->mode &= ~larg); | |
2276 | case SSL_CTRL_SET_MAX_SEND_FRAGMENT: | |
2277 | if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) | |
2278 | return 0; | |
2279 | ctx->max_send_fragment = larg; | |
2280 | if (ctx->max_send_fragment < ctx->split_send_fragment) | |
2281 | ctx->split_send_fragment = ctx->max_send_fragment; | |
2282 | return 1; | |
2283 | case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT: | |
2284 | if ((size_t)larg > ctx->max_send_fragment || larg == 0) | |
2285 | return 0; | |
2286 | ctx->split_send_fragment = larg; | |
2287 | return 1; | |
2288 | case SSL_CTRL_SET_MAX_PIPELINES: | |
2289 | if (larg < 1 || larg > SSL_MAX_PIPELINES) | |
2290 | return 0; | |
2291 | ctx->max_pipelines = larg; | |
2292 | return 1; | |
2293 | case SSL_CTRL_CERT_FLAGS: | |
2294 | return (ctx->cert->cert_flags |= larg); | |
2295 | case SSL_CTRL_CLEAR_CERT_FLAGS: | |
2296 | return (ctx->cert->cert_flags &= ~larg); | |
2297 | case SSL_CTRL_SET_MIN_PROTO_VERSION: | |
2298 | return ssl_check_allowed_versions(larg, ctx->max_proto_version) | |
2299 | && ssl_set_version_bound(ctx->method->version, (int)larg, | |
2300 | &ctx->min_proto_version); | |
2301 | case SSL_CTRL_GET_MIN_PROTO_VERSION: | |
2302 | return ctx->min_proto_version; | |
2303 | case SSL_CTRL_SET_MAX_PROTO_VERSION: | |
2304 | return ssl_check_allowed_versions(ctx->min_proto_version, larg) | |
2305 | && ssl_set_version_bound(ctx->method->version, (int)larg, | |
2306 | &ctx->max_proto_version); | |
2307 | case SSL_CTRL_GET_MAX_PROTO_VERSION: | |
2308 | return ctx->max_proto_version; | |
2309 | default: | |
2310 | return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg); | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void)) | |
2315 | { | |
2316 | switch (cmd) { | |
2317 | case SSL_CTRL_SET_MSG_CALLBACK: | |
2318 | ctx->msg_callback = (void (*) | |
2319 | (int write_p, int version, int content_type, | |
2320 | const void *buf, size_t len, SSL *ssl, | |
2321 | void *arg))(fp); | |
2322 | return 1; | |
2323 | ||
2324 | default: | |
2325 | return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp); | |
2326 | } | |
2327 | } | |
2328 | ||
2329 | int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) | |
2330 | { | |
2331 | if (a->id > b->id) | |
2332 | return 1; | |
2333 | if (a->id < b->id) | |
2334 | return -1; | |
2335 | return 0; | |
2336 | } | |
2337 | ||
2338 | int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap, | |
2339 | const SSL_CIPHER *const *bp) | |
2340 | { | |
2341 | if ((*ap)->id > (*bp)->id) | |
2342 | return 1; | |
2343 | if ((*ap)->id < (*bp)->id) | |
2344 | return -1; | |
2345 | return 0; | |
2346 | } | |
2347 | ||
2348 | /** return a STACK of the ciphers available for the SSL and in order of | |
2349 | * preference */ | |
2350 | STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s) | |
2351 | { | |
2352 | if (s != NULL) { | |
2353 | if (s->cipher_list != NULL) { | |
2354 | return s->cipher_list; | |
2355 | } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { | |
2356 | return s->ctx->cipher_list; | |
2357 | } | |
2358 | } | |
2359 | return NULL; | |
2360 | } | |
2361 | ||
2362 | STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s) | |
2363 | { | |
2364 | if ((s == NULL) || (s->session == NULL) || !s->server) | |
2365 | return NULL; | |
2366 | return s->session->ciphers; | |
2367 | } | |
2368 | ||
2369 | STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s) | |
2370 | { | |
2371 | STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers; | |
2372 | int i; | |
2373 | ciphers = SSL_get_ciphers(s); | |
2374 | if (!ciphers) | |
2375 | return NULL; | |
2376 | ssl_set_client_disabled(s); | |
2377 | for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) { | |
2378 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i); | |
2379 | if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) { | |
2380 | if (!sk) | |
2381 | sk = sk_SSL_CIPHER_new_null(); | |
2382 | if (!sk) | |
2383 | return NULL; | |
2384 | if (!sk_SSL_CIPHER_push(sk, c)) { | |
2385 | sk_SSL_CIPHER_free(sk); | |
2386 | return NULL; | |
2387 | } | |
2388 | } | |
2389 | } | |
2390 | return sk; | |
2391 | } | |
2392 | ||
2393 | /** return a STACK of the ciphers available for the SSL and in order of | |
2394 | * algorithm id */ | |
2395 | STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s) | |
2396 | { | |
2397 | if (s != NULL) { | |
2398 | if (s->cipher_list_by_id != NULL) { | |
2399 | return s->cipher_list_by_id; | |
2400 | } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) { | |
2401 | return s->ctx->cipher_list_by_id; | |
2402 | } | |
2403 | } | |
2404 | return NULL; | |
2405 | } | |
2406 | ||
2407 | /** The old interface to get the same thing as SSL_get_ciphers() */ | |
2408 | const char *SSL_get_cipher_list(const SSL *s, int n) | |
2409 | { | |
2410 | const SSL_CIPHER *c; | |
2411 | STACK_OF(SSL_CIPHER) *sk; | |
2412 | ||
2413 | if (s == NULL) | |
2414 | return NULL; | |
2415 | sk = SSL_get_ciphers(s); | |
2416 | if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) | |
2417 | return NULL; | |
2418 | c = sk_SSL_CIPHER_value(sk, n); | |
2419 | if (c == NULL) | |
2420 | return NULL; | |
2421 | return c->name; | |
2422 | } | |
2423 | ||
2424 | /** return a STACK of the ciphers available for the SSL_CTX and in order of | |
2425 | * preference */ | |
2426 | STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx) | |
2427 | { | |
2428 | if (ctx != NULL) | |
2429 | return ctx->cipher_list; | |
2430 | return NULL; | |
2431 | } | |
2432 | ||
2433 | /** specify the ciphers to be used by default by the SSL_CTX */ | |
2434 | int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) | |
2435 | { | |
2436 | STACK_OF(SSL_CIPHER) *sk; | |
2437 | ||
2438 | sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, | |
2439 | &ctx->cipher_list_by_id, str, ctx->cert); | |
2440 | /* | |
2441 | * ssl_create_cipher_list may return an empty stack if it was unable to | |
2442 | * find a cipher matching the given rule string (for example if the rule | |
2443 | * string specifies a cipher which has been disabled). This is not an | |
2444 | * error as far as ssl_create_cipher_list is concerned, and hence | |
2445 | * ctx->cipher_list and ctx->cipher_list_by_id has been updated. | |
2446 | */ | |
2447 | if (sk == NULL) | |
2448 | return 0; | |
2449 | else if (sk_SSL_CIPHER_num(sk) == 0) { | |
2450 | SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); | |
2451 | return 0; | |
2452 | } | |
2453 | return 1; | |
2454 | } | |
2455 | ||
2456 | /** specify the ciphers to be used by the SSL */ | |
2457 | int SSL_set_cipher_list(SSL *s, const char *str) | |
2458 | { | |
2459 | STACK_OF(SSL_CIPHER) *sk; | |
2460 | ||
2461 | sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, | |
2462 | &s->cipher_list_by_id, str, s->cert); | |
2463 | /* see comment in SSL_CTX_set_cipher_list */ | |
2464 | if (sk == NULL) | |
2465 | return 0; | |
2466 | else if (sk_SSL_CIPHER_num(sk) == 0) { | |
2467 | SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); | |
2468 | return 0; | |
2469 | } | |
2470 | return 1; | |
2471 | } | |
2472 | ||
2473 | char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len) | |
2474 | { | |
2475 | char *p; | |
2476 | STACK_OF(SSL_CIPHER) *sk; | |
2477 | const SSL_CIPHER *c; | |
2478 | int i; | |
2479 | ||
2480 | if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2)) | |
2481 | return NULL; | |
2482 | ||
2483 | p = buf; | |
2484 | sk = s->session->ciphers; | |
2485 | ||
2486 | if (sk_SSL_CIPHER_num(sk) == 0) | |
2487 | return NULL; | |
2488 | ||
2489 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
2490 | int n; | |
2491 | ||
2492 | c = sk_SSL_CIPHER_value(sk, i); | |
2493 | n = strlen(c->name); | |
2494 | if (n + 1 > len) { | |
2495 | if (p != buf) | |
2496 | --p; | |
2497 | *p = '\0'; | |
2498 | return buf; | |
2499 | } | |
2500 | strcpy(p, c->name); | |
2501 | p += n; | |
2502 | *(p++) = ':'; | |
2503 | len -= n + 1; | |
2504 | } | |
2505 | p[-1] = '\0'; | |
2506 | return buf; | |
2507 | } | |
2508 | ||
2509 | /** return a servername extension value if provided in Client Hello, or NULL. | |
2510 | * So far, only host_name types are defined (RFC 3546). | |
2511 | */ | |
2512 | ||
2513 | const char *SSL_get_servername(const SSL *s, const int type) | |
2514 | { | |
2515 | if (type != TLSEXT_NAMETYPE_host_name) | |
2516 | return NULL; | |
2517 | ||
2518 | return s->session && !s->ext.hostname ? | |
2519 | s->session->ext.hostname : s->ext.hostname; | |
2520 | } | |
2521 | ||
2522 | int SSL_get_servername_type(const SSL *s) | |
2523 | { | |
2524 | if (s->session | |
2525 | && (!s->ext.hostname ? s->session-> | |
2526 | ext.hostname : s->ext.hostname)) | |
2527 | return TLSEXT_NAMETYPE_host_name; | |
2528 | return -1; | |
2529 | } | |
2530 | ||
2531 | /* | |
2532 | * SSL_select_next_proto implements the standard protocol selection. It is | |
2533 | * expected that this function is called from the callback set by | |
2534 | * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a | |
2535 | * vector of 8-bit, length prefixed byte strings. The length byte itself is | |
2536 | * not included in the length. A byte string of length 0 is invalid. No byte | |
2537 | * string may be truncated. The current, but experimental algorithm for | |
2538 | * selecting the protocol is: 1) If the server doesn't support NPN then this | |
2539 | * is indicated to the callback. In this case, the client application has to | |
2540 | * abort the connection or have a default application level protocol. 2) If | |
2541 | * the server supports NPN, but advertises an empty list then the client | |
2542 | * selects the first protocol in its list, but indicates via the API that this | |
2543 | * fallback case was enacted. 3) Otherwise, the client finds the first | |
2544 | * protocol in the server's list that it supports and selects this protocol. | |
2545 | * This is because it's assumed that the server has better information about | |
2546 | * which protocol a client should use. 4) If the client doesn't support any | |
2547 | * of the server's advertised protocols, then this is treated the same as | |
2548 | * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was | |
2549 | * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. | |
2550 | */ | |
2551 | int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, | |
2552 | const unsigned char *server, | |
2553 | unsigned int server_len, | |
2554 | const unsigned char *client, unsigned int client_len) | |
2555 | { | |
2556 | unsigned int i, j; | |
2557 | const unsigned char *result; | |
2558 | int status = OPENSSL_NPN_UNSUPPORTED; | |
2559 | ||
2560 | /* | |
2561 | * For each protocol in server preference order, see if we support it. | |
2562 | */ | |
2563 | for (i = 0; i < server_len;) { | |
2564 | for (j = 0; j < client_len;) { | |
2565 | if (server[i] == client[j] && | |
2566 | memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) { | |
2567 | /* We found a match */ | |
2568 | result = &server[i]; | |
2569 | status = OPENSSL_NPN_NEGOTIATED; | |
2570 | goto found; | |
2571 | } | |
2572 | j += client[j]; | |
2573 | j++; | |
2574 | } | |
2575 | i += server[i]; | |
2576 | i++; | |
2577 | } | |
2578 | ||
2579 | /* There's no overlap between our protocols and the server's list. */ | |
2580 | result = client; | |
2581 | status = OPENSSL_NPN_NO_OVERLAP; | |
2582 | ||
2583 | found: | |
2584 | *out = (unsigned char *)result + 1; | |
2585 | *outlen = result[0]; | |
2586 | return status; | |
2587 | } | |
2588 | ||
2589 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
2590 | /* | |
2591 | * SSL_get0_next_proto_negotiated sets *data and *len to point to the | |
2592 | * client's requested protocol for this connection and returns 0. If the | |
2593 | * client didn't request any protocol, then *data is set to NULL. Note that | |
2594 | * the client can request any protocol it chooses. The value returned from | |
2595 | * this function need not be a member of the list of supported protocols | |
2596 | * provided by the callback. | |
2597 | */ | |
2598 | void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, | |
2599 | unsigned *len) | |
2600 | { | |
2601 | *data = s->ext.npn; | |
2602 | if (!*data) { | |
2603 | *len = 0; | |
2604 | } else { | |
2605 | *len = (unsigned int)s->ext.npn_len; | |
2606 | } | |
2607 | } | |
2608 | ||
2609 | /* | |
2610 | * SSL_CTX_set_npn_advertised_cb sets a callback that is called when | |
2611 | * a TLS server needs a list of supported protocols for Next Protocol | |
2612 | * Negotiation. The returned list must be in wire format. The list is | |
2613 | * returned by setting |out| to point to it and |outlen| to its length. This | |
2614 | * memory will not be modified, but one should assume that the SSL* keeps a | |
2615 | * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it | |
2616 | * wishes to advertise. Otherwise, no such extension will be included in the | |
2617 | * ServerHello. | |
2618 | */ | |
2619 | void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx, | |
2620 | SSL_CTX_npn_advertised_cb_func cb, | |
2621 | void *arg) | |
2622 | { | |
2623 | ctx->ext.npn_advertised_cb = cb; | |
2624 | ctx->ext.npn_advertised_cb_arg = arg; | |
2625 | } | |
2626 | ||
2627 | /* | |
2628 | * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a | |
2629 | * client needs to select a protocol from the server's provided list. |out| | |
2630 | * must be set to point to the selected protocol (which may be within |in|). | |
2631 | * The length of the protocol name must be written into |outlen|. The | |
2632 | * server's advertised protocols are provided in |in| and |inlen|. The | |
2633 | * callback can assume that |in| is syntactically valid. The client must | |
2634 | * select a protocol. It is fatal to the connection if this callback returns | |
2635 | * a value other than SSL_TLSEXT_ERR_OK. | |
2636 | */ | |
2637 | void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx, | |
2638 | SSL_CTX_npn_select_cb_func cb, | |
2639 | void *arg) | |
2640 | { | |
2641 | ctx->ext.npn_select_cb = cb; | |
2642 | ctx->ext.npn_select_cb_arg = arg; | |
2643 | } | |
2644 | #endif | |
2645 | ||
2646 | /* | |
2647 | * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|. | |
2648 | * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit | |
2649 | * length-prefixed strings). Returns 0 on success. | |
2650 | */ | |
2651 | int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, | |
2652 | unsigned int protos_len) | |
2653 | { | |
2654 | OPENSSL_free(ctx->ext.alpn); | |
2655 | ctx->ext.alpn = OPENSSL_memdup(protos, protos_len); | |
2656 | if (ctx->ext.alpn == NULL) { | |
2657 | SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE); | |
2658 | return 1; | |
2659 | } | |
2660 | ctx->ext.alpn_len = protos_len; | |
2661 | ||
2662 | return 0; | |
2663 | } | |
2664 | ||
2665 | /* | |
2666 | * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|. | |
2667 | * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit | |
2668 | * length-prefixed strings). Returns 0 on success. | |
2669 | */ | |
2670 | int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos, | |
2671 | unsigned int protos_len) | |
2672 | { | |
2673 | OPENSSL_free(ssl->ext.alpn); | |
2674 | ssl->ext.alpn = OPENSSL_memdup(protos, protos_len); | |
2675 | if (ssl->ext.alpn == NULL) { | |
2676 | SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE); | |
2677 | return 1; | |
2678 | } | |
2679 | ssl->ext.alpn_len = protos_len; | |
2680 | ||
2681 | return 0; | |
2682 | } | |
2683 | ||
2684 | /* | |
2685 | * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is | |
2686 | * called during ClientHello processing in order to select an ALPN protocol | |
2687 | * from the client's list of offered protocols. | |
2688 | */ | |
2689 | void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx, | |
2690 | SSL_CTX_alpn_select_cb_func cb, | |
2691 | void *arg) | |
2692 | { | |
2693 | ctx->ext.alpn_select_cb = cb; | |
2694 | ctx->ext.alpn_select_cb_arg = arg; | |
2695 | } | |
2696 | ||
2697 | /* | |
2698 | * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|. | |
2699 | * On return it sets |*data| to point to |*len| bytes of protocol name | |
2700 | * (not including the leading length-prefix byte). If the server didn't | |
2701 | * respond with a negotiated protocol then |*len| will be zero. | |
2702 | */ | |
2703 | void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, | |
2704 | unsigned int *len) | |
2705 | { | |
2706 | *data = NULL; | |
2707 | if (ssl->s3) | |
2708 | *data = ssl->s3->alpn_selected; | |
2709 | if (*data == NULL) | |
2710 | *len = 0; | |
2711 | else | |
2712 | *len = (unsigned int)ssl->s3->alpn_selected_len; | |
2713 | } | |
2714 | ||
2715 | int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, | |
2716 | const char *label, size_t llen, | |
2717 | const unsigned char *context, size_t contextlen, | |
2718 | int use_context) | |
2719 | { | |
2720 | if (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER) | |
2721 | return -1; | |
2722 | ||
2723 | return s->method->ssl3_enc->export_keying_material(s, out, olen, label, | |
2724 | llen, context, | |
2725 | contextlen, use_context); | |
2726 | } | |
2727 | ||
2728 | static unsigned long ssl_session_hash(const SSL_SESSION *a) | |
2729 | { | |
2730 | const unsigned char *session_id = a->session_id; | |
2731 | unsigned long l; | |
2732 | unsigned char tmp_storage[4]; | |
2733 | ||
2734 | if (a->session_id_length < sizeof(tmp_storage)) { | |
2735 | memset(tmp_storage, 0, sizeof(tmp_storage)); | |
2736 | memcpy(tmp_storage, a->session_id, a->session_id_length); | |
2737 | session_id = tmp_storage; | |
2738 | } | |
2739 | ||
2740 | l = (unsigned long) | |
2741 | ((unsigned long)session_id[0]) | | |
2742 | ((unsigned long)session_id[1] << 8L) | | |
2743 | ((unsigned long)session_id[2] << 16L) | | |
2744 | ((unsigned long)session_id[3] << 24L); | |
2745 | return l; | |
2746 | } | |
2747 | ||
2748 | /* | |
2749 | * NB: If this function (or indeed the hash function which uses a sort of | |
2750 | * coarser function than this one) is changed, ensure | |
2751 | * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on | |
2752 | * being able to construct an SSL_SESSION that will collide with any existing | |
2753 | * session with a matching session ID. | |
2754 | */ | |
2755 | static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) | |
2756 | { | |
2757 | if (a->ssl_version != b->ssl_version) | |
2758 | return 1; | |
2759 | if (a->session_id_length != b->session_id_length) | |
2760 | return 1; | |
2761 | return memcmp(a->session_id, b->session_id, a->session_id_length); | |
2762 | } | |
2763 | ||
2764 | /* | |
2765 | * These wrapper functions should remain rather than redeclaring | |
2766 | * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each | |
2767 | * variable. The reason is that the functions aren't static, they're exposed | |
2768 | * via ssl.h. | |
2769 | */ | |
2770 | ||
2771 | SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth) | |
2772 | { | |
2773 | SSL_CTX *ret = NULL; | |
2774 | ||
2775 | if (meth == NULL) { | |
2776 | SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); | |
2777 | return NULL; | |
2778 | } | |
2779 | ||
2780 | if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL)) | |
2781 | return NULL; | |
2782 | ||
2783 | if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { | |
2784 | SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); | |
2785 | goto err; | |
2786 | } | |
2787 | ret = OPENSSL_zalloc(sizeof(*ret)); | |
2788 | if (ret == NULL) | |
2789 | goto err; | |
2790 | ||
2791 | ret->method = meth; | |
2792 | ret->min_proto_version = 0; | |
2793 | ret->max_proto_version = 0; | |
2794 | ret->session_cache_mode = SSL_SESS_CACHE_SERVER; | |
2795 | ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; | |
2796 | /* We take the system default. */ | |
2797 | ret->session_timeout = meth->get_timeout(); | |
2798 | ret->references = 1; | |
2799 | ret->lock = CRYPTO_THREAD_lock_new(); | |
2800 | if (ret->lock == NULL) { | |
2801 | SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); | |
2802 | OPENSSL_free(ret); | |
2803 | return NULL; | |
2804 | } | |
2805 | ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; | |
2806 | ret->verify_mode = SSL_VERIFY_NONE; | |
2807 | if ((ret->cert = ssl_cert_new()) == NULL) | |
2808 | goto err; | |
2809 | ||
2810 | ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp); | |
2811 | if (ret->sessions == NULL) | |
2812 | goto err; | |
2813 | ret->cert_store = X509_STORE_new(); | |
2814 | if (ret->cert_store == NULL) | |
2815 | goto err; | |
2816 | #ifndef OPENSSL_NO_CT | |
2817 | ret->ctlog_store = CTLOG_STORE_new(); | |
2818 | if (ret->ctlog_store == NULL) | |
2819 | goto err; | |
2820 | #endif | |
2821 | if (!ssl_create_cipher_list(ret->method, | |
2822 | &ret->cipher_list, &ret->cipher_list_by_id, | |
2823 | SSL_DEFAULT_CIPHER_LIST, ret->cert) | |
2824 | || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { | |
2825 | SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); | |
2826 | goto err2; | |
2827 | } | |
2828 | ||
2829 | ret->param = X509_VERIFY_PARAM_new(); | |
2830 | if (ret->param == NULL) | |
2831 | goto err; | |
2832 | ||
2833 | if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { | |
2834 | SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); | |
2835 | goto err2; | |
2836 | } | |
2837 | if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { | |
2838 | SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); | |
2839 | goto err2; | |
2840 | } | |
2841 | ||
2842 | if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL) | |
2843 | goto err; | |
2844 | ||
2845 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data)) | |
2846 | goto err; | |
2847 | ||
2848 | /* No compression for DTLS */ | |
2849 | if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)) | |
2850 | ret->comp_methods = SSL_COMP_get_compression_methods(); | |
2851 | ||
2852 | ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; | |
2853 | ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; | |
2854 | ||
2855 | /* Setup RFC5077 ticket keys */ | |
2856 | if ((RAND_bytes(ret->ext.tick_key_name, | |
2857 | sizeof(ret->ext.tick_key_name)) <= 0) | |
2858 | || (RAND_bytes(ret->ext.tick_hmac_key, | |
2859 | sizeof(ret->ext.tick_hmac_key)) <= 0) | |
2860 | || (RAND_bytes(ret->ext.tick_aes_key, | |
2861 | sizeof(ret->ext.tick_aes_key)) <= 0)) | |
2862 | ret->options |= SSL_OP_NO_TICKET; | |
2863 | ||
2864 | #ifndef OPENSSL_NO_SRP | |
2865 | if (!SSL_CTX_SRP_CTX_init(ret)) | |
2866 | goto err; | |
2867 | #endif | |
2868 | #ifndef OPENSSL_NO_ENGINE | |
2869 | # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO | |
2870 | # define eng_strx(x) #x | |
2871 | # define eng_str(x) eng_strx(x) | |
2872 | /* Use specific client engine automatically... ignore errors */ | |
2873 | { | |
2874 | ENGINE *eng; | |
2875 | eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); | |
2876 | if (!eng) { | |
2877 | ERR_clear_error(); | |
2878 | ENGINE_load_builtin_engines(); | |
2879 | eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); | |
2880 | } | |
2881 | if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) | |
2882 | ERR_clear_error(); | |
2883 | } | |
2884 | # endif | |
2885 | #endif | |
2886 | /* | |
2887 | * Default is to connect to non-RI servers. When RI is more widely | |
2888 | * deployed might change this. | |
2889 | */ | |
2890 | ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; | |
2891 | /* | |
2892 | * Disable compression by default to prevent CRIME. Applications can | |
2893 | * re-enable compression by configuring | |
2894 | * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION); | |
2895 | * or by using the SSL_CONF library. | |
2896 | */ | |
2897 | ret->options |= SSL_OP_NO_COMPRESSION; | |
2898 | ||
2899 | ret->ext.status_type = TLSEXT_STATUSTYPE_nothing; | |
2900 | ||
2901 | /* | |
2902 | * Default max early data is a fully loaded single record. Could be split | |
2903 | * across multiple records in practice | |
2904 | */ | |
2905 | ret->max_early_data = SSL3_RT_MAX_PLAIN_LENGTH; | |
2906 | ||
2907 | return ret; | |
2908 | err: | |
2909 | SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); | |
2910 | err2: | |
2911 | SSL_CTX_free(ret); | |
2912 | return NULL; | |
2913 | } | |
2914 | ||
2915 | int SSL_CTX_up_ref(SSL_CTX *ctx) | |
2916 | { | |
2917 | int i; | |
2918 | ||
2919 | if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0) | |
2920 | return 0; | |
2921 | ||
2922 | REF_PRINT_COUNT("SSL_CTX", ctx); | |
2923 | REF_ASSERT_ISNT(i < 2); | |
2924 | return ((i > 1) ? 1 : 0); | |
2925 | } | |
2926 | ||
2927 | void SSL_CTX_free(SSL_CTX *a) | |
2928 | { | |
2929 | int i; | |
2930 | ||
2931 | if (a == NULL) | |
2932 | return; | |
2933 | ||
2934 | CRYPTO_DOWN_REF(&a->references, &i, a->lock); | |
2935 | REF_PRINT_COUNT("SSL_CTX", a); | |
2936 | if (i > 0) | |
2937 | return; | |
2938 | REF_ASSERT_ISNT(i < 0); | |
2939 | ||
2940 | X509_VERIFY_PARAM_free(a->param); | |
2941 | dane_ctx_final(&a->dane); | |
2942 | ||
2943 | /* | |
2944 | * Free internal session cache. However: the remove_cb() may reference | |
2945 | * the ex_data of SSL_CTX, thus the ex_data store can only be removed | |
2946 | * after the sessions were flushed. | |
2947 | * As the ex_data handling routines might also touch the session cache, | |
2948 | * the most secure solution seems to be: empty (flush) the cache, then | |
2949 | * free ex_data, then finally free the cache. | |
2950 | * (See ticket [openssl.org #212].) | |
2951 | */ | |
2952 | if (a->sessions != NULL) | |
2953 | SSL_CTX_flush_sessions(a, 0); | |
2954 | ||
2955 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); | |
2956 | lh_SSL_SESSION_free(a->sessions); | |
2957 | X509_STORE_free(a->cert_store); | |
2958 | #ifndef OPENSSL_NO_CT | |
2959 | CTLOG_STORE_free(a->ctlog_store); | |
2960 | #endif | |
2961 | sk_SSL_CIPHER_free(a->cipher_list); | |
2962 | sk_SSL_CIPHER_free(a->cipher_list_by_id); | |
2963 | ssl_cert_free(a->cert); | |
2964 | sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free); | |
2965 | sk_X509_pop_free(a->extra_certs, X509_free); | |
2966 | a->comp_methods = NULL; | |
2967 | #ifndef OPENSSL_NO_SRTP | |
2968 | sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); | |
2969 | #endif | |
2970 | #ifndef OPENSSL_NO_SRP | |
2971 | SSL_CTX_SRP_CTX_free(a); | |
2972 | #endif | |
2973 | #ifndef OPENSSL_NO_ENGINE | |
2974 | ENGINE_finish(a->client_cert_engine); | |
2975 | #endif | |
2976 | ||
2977 | #ifndef OPENSSL_NO_EC | |
2978 | OPENSSL_free(a->ext.ecpointformats); | |
2979 | OPENSSL_free(a->ext.supportedgroups); | |
2980 | #endif | |
2981 | OPENSSL_free(a->ext.alpn); | |
2982 | ||
2983 | CRYPTO_THREAD_lock_free(a->lock); | |
2984 | ||
2985 | OPENSSL_free(a); | |
2986 | } | |
2987 | ||
2988 | void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) | |
2989 | { | |
2990 | ctx->default_passwd_callback = cb; | |
2991 | } | |
2992 | ||
2993 | void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) | |
2994 | { | |
2995 | ctx->default_passwd_callback_userdata = u; | |
2996 | } | |
2997 | ||
2998 | pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx) | |
2999 | { | |
3000 | return ctx->default_passwd_callback; | |
3001 | } | |
3002 | ||
3003 | void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx) | |
3004 | { | |
3005 | return ctx->default_passwd_callback_userdata; | |
3006 | } | |
3007 | ||
3008 | void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb) | |
3009 | { | |
3010 | s->default_passwd_callback = cb; | |
3011 | } | |
3012 | ||
3013 | void SSL_set_default_passwd_cb_userdata(SSL *s, void *u) | |
3014 | { | |
3015 | s->default_passwd_callback_userdata = u; | |
3016 | } | |
3017 | ||
3018 | pem_password_cb *SSL_get_default_passwd_cb(SSL *s) | |
3019 | { | |
3020 | return s->default_passwd_callback; | |
3021 | } | |
3022 | ||
3023 | void *SSL_get_default_passwd_cb_userdata(SSL *s) | |
3024 | { | |
3025 | return s->default_passwd_callback_userdata; | |
3026 | } | |
3027 | ||
3028 | void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, | |
3029 | int (*cb) (X509_STORE_CTX *, void *), | |
3030 | void *arg) | |
3031 | { | |
3032 | ctx->app_verify_callback = cb; | |
3033 | ctx->app_verify_arg = arg; | |
3034 | } | |
3035 | ||
3036 | void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, | |
3037 | int (*cb) (int, X509_STORE_CTX *)) | |
3038 | { | |
3039 | ctx->verify_mode = mode; | |
3040 | ctx->default_verify_callback = cb; | |
3041 | } | |
3042 | ||
3043 | void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) | |
3044 | { | |
3045 | X509_VERIFY_PARAM_set_depth(ctx->param, depth); | |
3046 | } | |
3047 | ||
3048 | void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg) | |
3049 | { | |
3050 | ssl_cert_set_cert_cb(c->cert, cb, arg); | |
3051 | } | |
3052 | ||
3053 | void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg) | |
3054 | { | |
3055 | ssl_cert_set_cert_cb(s->cert, cb, arg); | |
3056 | } | |
3057 | ||
3058 | void ssl_set_masks(SSL *s) | |
3059 | { | |
3060 | CERT *c = s->cert; | |
3061 | uint32_t *pvalid = s->s3->tmp.valid_flags; | |
3062 | int rsa_enc, rsa_sign, dh_tmp, dsa_sign; | |
3063 | unsigned long mask_k, mask_a; | |
3064 | #ifndef OPENSSL_NO_EC | |
3065 | int have_ecc_cert, ecdsa_ok; | |
3066 | #endif | |
3067 | if (c == NULL) | |
3068 | return; | |
3069 | ||
3070 | #ifndef OPENSSL_NO_DH | |
3071 | dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto); | |
3072 | #else | |
3073 | dh_tmp = 0; | |
3074 | #endif | |
3075 | ||
3076 | rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID; | |
3077 | rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID; | |
3078 | dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID; | |
3079 | #ifndef OPENSSL_NO_EC | |
3080 | have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID; | |
3081 | #endif | |
3082 | mask_k = 0; | |
3083 | mask_a = 0; | |
3084 | ||
3085 | #ifdef CIPHER_DEBUG | |
3086 | fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n", | |
3087 | dh_tmp, rsa_enc, rsa_sign, dsa_sign); | |
3088 | #endif | |
3089 | ||
3090 | #ifndef OPENSSL_NO_GOST | |
3091 | if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) { | |
3092 | mask_k |= SSL_kGOST; | |
3093 | mask_a |= SSL_aGOST12; | |
3094 | } | |
3095 | if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) { | |
3096 | mask_k |= SSL_kGOST; | |
3097 | mask_a |= SSL_aGOST12; | |
3098 | } | |
3099 | if (ssl_has_cert(s, SSL_PKEY_GOST01)) { | |
3100 | mask_k |= SSL_kGOST; | |
3101 | mask_a |= SSL_aGOST01; | |
3102 | } | |
3103 | #endif | |
3104 | ||
3105 | if (rsa_enc) | |
3106 | mask_k |= SSL_kRSA; | |
3107 | ||
3108 | if (dh_tmp) | |
3109 | mask_k |= SSL_kDHE; | |
3110 | ||
3111 | /* | |
3112 | * If we only have an RSA-PSS certificate allow RSA authentication | |
3113 | * if TLS 1.2 and peer supports it. | |
3114 | */ | |
3115 | ||
3116 | if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN) | |
3117 | && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN | |
3118 | && TLS1_get_version(s) == TLS1_2_VERSION)) | |
3119 | mask_a |= SSL_aRSA; | |
3120 | ||
3121 | if (dsa_sign) { | |
3122 | mask_a |= SSL_aDSS; | |
3123 | } | |
3124 | ||
3125 | mask_a |= SSL_aNULL; | |
3126 | ||
3127 | /* | |
3128 | * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites | |
3129 | * depending on the key usage extension. | |
3130 | */ | |
3131 | #ifndef OPENSSL_NO_EC | |
3132 | if (have_ecc_cert) { | |
3133 | uint32_t ex_kusage; | |
3134 | ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509); | |
3135 | ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE; | |
3136 | if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN)) | |
3137 | ecdsa_ok = 0; | |
3138 | if (ecdsa_ok) | |
3139 | mask_a |= SSL_aECDSA; | |
3140 | } | |
3141 | /* Allow Ed25519 for TLS 1.2 if peer supports it */ | |
3142 | if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519) | |
3143 | && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN | |
3144 | && TLS1_get_version(s) == TLS1_2_VERSION) | |
3145 | mask_a |= SSL_aECDSA; | |
3146 | #endif | |
3147 | ||
3148 | #ifndef OPENSSL_NO_EC | |
3149 | mask_k |= SSL_kECDHE; | |
3150 | #endif | |
3151 | ||
3152 | #ifndef OPENSSL_NO_PSK | |
3153 | mask_k |= SSL_kPSK; | |
3154 | mask_a |= SSL_aPSK; | |
3155 | if (mask_k & SSL_kRSA) | |
3156 | mask_k |= SSL_kRSAPSK; | |
3157 | if (mask_k & SSL_kDHE) | |
3158 | mask_k |= SSL_kDHEPSK; | |
3159 | if (mask_k & SSL_kECDHE) | |
3160 | mask_k |= SSL_kECDHEPSK; | |
3161 | #endif | |
3162 | ||
3163 | s->s3->tmp.mask_k = mask_k; | |
3164 | s->s3->tmp.mask_a = mask_a; | |
3165 | } | |
3166 | ||
3167 | #ifndef OPENSSL_NO_EC | |
3168 | ||
3169 | int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) | |
3170 | { | |
3171 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) { | |
3172 | /* key usage, if present, must allow signing */ | |
3173 | if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) { | |
3174 | SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, | |
3175 | SSL_R_ECC_CERT_NOT_FOR_SIGNING); | |
3176 | return 0; | |
3177 | } | |
3178 | } | |
3179 | return 1; /* all checks are ok */ | |
3180 | } | |
3181 | ||
3182 | #endif | |
3183 | ||
3184 | int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo, | |
3185 | size_t *serverinfo_length) | |
3186 | { | |
3187 | CERT_PKEY *cpk = s->s3->tmp.cert; | |
3188 | *serverinfo_length = 0; | |
3189 | ||
3190 | if (cpk == NULL || cpk->serverinfo == NULL) | |
3191 | return 0; | |
3192 | ||
3193 | *serverinfo = cpk->serverinfo; | |
3194 | *serverinfo_length = cpk->serverinfo_length; | |
3195 | return 1; | |
3196 | } | |
3197 | ||
3198 | void ssl_update_cache(SSL *s, int mode) | |
3199 | { | |
3200 | int i; | |
3201 | ||
3202 | /* | |
3203 | * If the session_id_length is 0, we are not supposed to cache it, and it | |
3204 | * would be rather hard to do anyway :-) | |
3205 | */ | |
3206 | if (s->session->session_id_length == 0) | |
3207 | return; | |
3208 | ||
3209 | i = s->session_ctx->session_cache_mode; | |
3210 | if ((i & mode) != 0 | |
3211 | && (!s->hit || SSL_IS_TLS13(s)) | |
3212 | && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) != 0 | |
3213 | || SSL_CTX_add_session(s->session_ctx, s->session)) | |
3214 | && s->session_ctx->new_session_cb != NULL) { | |
3215 | SSL_SESSION_up_ref(s->session); | |
3216 | if (!s->session_ctx->new_session_cb(s, s->session)) | |
3217 | SSL_SESSION_free(s->session); | |
3218 | } | |
3219 | ||
3220 | /* auto flush every 255 connections */ | |
3221 | if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) { | |
3222 | int *stat, val; | |
3223 | if (mode & SSL_SESS_CACHE_CLIENT) | |
3224 | stat = &s->session_ctx->stats.sess_connect_good; | |
3225 | else | |
3226 | stat = &s->session_ctx->stats.sess_accept_good; | |
3227 | if (CRYPTO_atomic_read(stat, &val, s->session_ctx->lock) | |
3228 | && (val & 0xff) == 0xff) | |
3229 | SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL)); | |
3230 | } | |
3231 | } | |
3232 | ||
3233 | const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx) | |
3234 | { | |
3235 | return ctx->method; | |
3236 | } | |
3237 | ||
3238 | const SSL_METHOD *SSL_get_ssl_method(SSL *s) | |
3239 | { | |
3240 | return s->method; | |
3241 | } | |
3242 | ||
3243 | int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) | |
3244 | { | |
3245 | int ret = 1; | |
3246 | ||
3247 | if (s->method != meth) { | |
3248 | const SSL_METHOD *sm = s->method; | |
3249 | int (*hf) (SSL *) = s->handshake_func; | |
3250 | ||
3251 | if (sm->version == meth->version) | |
3252 | s->method = meth; | |
3253 | else { | |
3254 | sm->ssl_free(s); | |
3255 | s->method = meth; | |
3256 | ret = s->method->ssl_new(s); | |
3257 | } | |
3258 | ||
3259 | if (hf == sm->ssl_connect) | |
3260 | s->handshake_func = meth->ssl_connect; | |
3261 | else if (hf == sm->ssl_accept) | |
3262 | s->handshake_func = meth->ssl_accept; | |
3263 | } | |
3264 | return ret; | |
3265 | } | |
3266 | ||
3267 | int SSL_get_error(const SSL *s, int i) | |
3268 | { | |
3269 | int reason; | |
3270 | unsigned long l; | |
3271 | BIO *bio; | |
3272 | ||
3273 | if (i > 0) | |
3274 | return SSL_ERROR_NONE; | |
3275 | ||
3276 | /* | |
3277 | * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc, | |
3278 | * where we do encode the error | |
3279 | */ | |
3280 | if ((l = ERR_peek_error()) != 0) { | |
3281 | if (ERR_GET_LIB(l) == ERR_LIB_SYS) | |
3282 | return SSL_ERROR_SYSCALL; | |
3283 | else | |
3284 | return SSL_ERROR_SSL; | |
3285 | } | |
3286 | ||
3287 | if (SSL_want_read(s)) { | |
3288 | bio = SSL_get_rbio(s); | |
3289 | if (BIO_should_read(bio)) | |
3290 | return SSL_ERROR_WANT_READ; | |
3291 | else if (BIO_should_write(bio)) | |
3292 | /* | |
3293 | * This one doesn't make too much sense ... We never try to write | |
3294 | * to the rbio, and an application program where rbio and wbio | |
3295 | * are separate couldn't even know what it should wait for. | |
3296 | * However if we ever set s->rwstate incorrectly (so that we have | |
3297 | * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and | |
3298 | * wbio *are* the same, this test works around that bug; so it | |
3299 | * might be safer to keep it. | |
3300 | */ | |
3301 | return SSL_ERROR_WANT_WRITE; | |
3302 | else if (BIO_should_io_special(bio)) { | |
3303 | reason = BIO_get_retry_reason(bio); | |
3304 | if (reason == BIO_RR_CONNECT) | |
3305 | return SSL_ERROR_WANT_CONNECT; | |
3306 | else if (reason == BIO_RR_ACCEPT) | |
3307 | return SSL_ERROR_WANT_ACCEPT; | |
3308 | else | |
3309 | return SSL_ERROR_SYSCALL; /* unknown */ | |
3310 | } | |
3311 | } | |
3312 | ||
3313 | if (SSL_want_write(s)) { | |
3314 | /* Access wbio directly - in order to use the buffered bio if present */ | |
3315 | bio = s->wbio; | |
3316 | if (BIO_should_write(bio)) | |
3317 | return SSL_ERROR_WANT_WRITE; | |
3318 | else if (BIO_should_read(bio)) | |
3319 | /* | |
3320 | * See above (SSL_want_read(s) with BIO_should_write(bio)) | |
3321 | */ | |
3322 | return SSL_ERROR_WANT_READ; | |
3323 | else if (BIO_should_io_special(bio)) { | |
3324 | reason = BIO_get_retry_reason(bio); | |
3325 | if (reason == BIO_RR_CONNECT) | |
3326 | return SSL_ERROR_WANT_CONNECT; | |
3327 | else if (reason == BIO_RR_ACCEPT) | |
3328 | return SSL_ERROR_WANT_ACCEPT; | |
3329 | else | |
3330 | return SSL_ERROR_SYSCALL; | |
3331 | } | |
3332 | } | |
3333 | if (SSL_want_x509_lookup(s)) | |
3334 | return SSL_ERROR_WANT_X509_LOOKUP; | |
3335 | if (SSL_want_async(s)) | |
3336 | return SSL_ERROR_WANT_ASYNC; | |
3337 | if (SSL_want_async_job(s)) | |
3338 | return SSL_ERROR_WANT_ASYNC_JOB; | |
3339 | if (SSL_want_client_hello_cb(s)) | |
3340 | return SSL_ERROR_WANT_CLIENT_HELLO_CB; | |
3341 | ||
3342 | if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && | |
3343 | (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) | |
3344 | return SSL_ERROR_ZERO_RETURN; | |
3345 | ||
3346 | return SSL_ERROR_SYSCALL; | |
3347 | } | |
3348 | ||
3349 | static int ssl_do_handshake_intern(void *vargs) | |
3350 | { | |
3351 | struct ssl_async_args *args; | |
3352 | SSL *s; | |
3353 | ||
3354 | args = (struct ssl_async_args *)vargs; | |
3355 | s = args->s; | |
3356 | ||
3357 | return s->handshake_func(s); | |
3358 | } | |
3359 | ||
3360 | int SSL_do_handshake(SSL *s) | |
3361 | { | |
3362 | int ret = 1; | |
3363 | ||
3364 | if (s->handshake_func == NULL) { | |
3365 | SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); | |
3366 | return -1; | |
3367 | } | |
3368 | ||
3369 | ossl_statem_check_finish_init(s, -1); | |
3370 | ||
3371 | s->method->ssl_renegotiate_check(s, 0); | |
3372 | ||
3373 | if (SSL_is_server(s)) { | |
3374 | /* clear SNI settings at server-side */ | |
3375 | OPENSSL_free(s->ext.hostname); | |
3376 | s->ext.hostname = NULL; | |
3377 | } | |
3378 | ||
3379 | if (SSL_in_init(s) || SSL_in_before(s)) { | |
3380 | if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { | |
3381 | struct ssl_async_args args; | |
3382 | ||
3383 | args.s = s; | |
3384 | ||
3385 | ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern); | |
3386 | } else { | |
3387 | ret = s->handshake_func(s); | |
3388 | } | |
3389 | } | |
3390 | return ret; | |
3391 | } | |
3392 | ||
3393 | void SSL_set_accept_state(SSL *s) | |
3394 | { | |
3395 | s->server = 1; | |
3396 | s->shutdown = 0; | |
3397 | ossl_statem_clear(s); | |
3398 | s->handshake_func = s->method->ssl_accept; | |
3399 | clear_ciphers(s); | |
3400 | } | |
3401 | ||
3402 | void SSL_set_connect_state(SSL *s) | |
3403 | { | |
3404 | s->server = 0; | |
3405 | s->shutdown = 0; | |
3406 | ossl_statem_clear(s); | |
3407 | s->handshake_func = s->method->ssl_connect; | |
3408 | clear_ciphers(s); | |
3409 | } | |
3410 | ||
3411 | int ssl_undefined_function(SSL *s) | |
3412 | { | |
3413 | SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
3414 | return 0; | |
3415 | } | |
3416 | ||
3417 | int ssl_undefined_void_function(void) | |
3418 | { | |
3419 | SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, | |
3420 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
3421 | return 0; | |
3422 | } | |
3423 | ||
3424 | int ssl_undefined_const_function(const SSL *s) | |
3425 | { | |
3426 | return 0; | |
3427 | } | |
3428 | ||
3429 | const SSL_METHOD *ssl_bad_method(int ver) | |
3430 | { | |
3431 | SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
3432 | return NULL; | |
3433 | } | |
3434 | ||
3435 | const char *ssl_protocol_to_string(int version) | |
3436 | { | |
3437 | switch(version) | |
3438 | { | |
3439 | case TLS1_3_VERSION: | |
3440 | return "TLSv1.3"; | |
3441 | ||
3442 | case TLS1_2_VERSION: | |
3443 | return "TLSv1.2"; | |
3444 | ||
3445 | case TLS1_1_VERSION: | |
3446 | return "TLSv1.1"; | |
3447 | ||
3448 | case TLS1_VERSION: | |
3449 | return "TLSv1"; | |
3450 | ||
3451 | case SSL3_VERSION: | |
3452 | return "SSLv3"; | |
3453 | ||
3454 | case DTLS1_BAD_VER: | |
3455 | return "DTLSv0.9"; | |
3456 | ||
3457 | case DTLS1_VERSION: | |
3458 | return "DTLSv1"; | |
3459 | ||
3460 | case DTLS1_2_VERSION: | |
3461 | return "DTLSv1.2"; | |
3462 | ||
3463 | default: | |
3464 | return "unknown"; | |
3465 | } | |
3466 | } | |
3467 | ||
3468 | const char *SSL_get_version(const SSL *s) | |
3469 | { | |
3470 | return ssl_protocol_to_string(s->version); | |
3471 | } | |
3472 | ||
3473 | SSL *SSL_dup(SSL *s) | |
3474 | { | |
3475 | STACK_OF(X509_NAME) *sk; | |
3476 | X509_NAME *xn; | |
3477 | SSL *ret; | |
3478 | int i; | |
3479 | ||
3480 | /* If we're not quiescent, just up_ref! */ | |
3481 | if (!SSL_in_init(s) || !SSL_in_before(s)) { | |
3482 | CRYPTO_UP_REF(&s->references, &i, s->lock); | |
3483 | return s; | |
3484 | } | |
3485 | ||
3486 | /* | |
3487 | * Otherwise, copy configuration state, and session if set. | |
3488 | */ | |
3489 | if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) | |
3490 | return NULL; | |
3491 | ||
3492 | if (s->session != NULL) { | |
3493 | /* | |
3494 | * Arranges to share the same session via up_ref. This "copies" | |
3495 | * session-id, SSL_METHOD, sid_ctx, and 'cert' | |
3496 | */ | |
3497 | if (!SSL_copy_session_id(ret, s)) | |
3498 | goto err; | |
3499 | } else { | |
3500 | /* | |
3501 | * No session has been established yet, so we have to expect that | |
3502 | * s->cert or ret->cert will be changed later -- they should not both | |
3503 | * point to the same object, and thus we can't use | |
3504 | * SSL_copy_session_id. | |
3505 | */ | |
3506 | if (!SSL_set_ssl_method(ret, s->method)) | |
3507 | goto err; | |
3508 | ||
3509 | if (s->cert != NULL) { | |
3510 | ssl_cert_free(ret->cert); | |
3511 | ret->cert = ssl_cert_dup(s->cert); | |
3512 | if (ret->cert == NULL) | |
3513 | goto err; | |
3514 | } | |
3515 | ||
3516 | if (!SSL_set_session_id_context(ret, s->sid_ctx, | |
3517 | (int)s->sid_ctx_length)) | |
3518 | goto err; | |
3519 | } | |
3520 | ||
3521 | if (!ssl_dane_dup(ret, s)) | |
3522 | goto err; | |
3523 | ret->version = s->version; | |
3524 | ret->options = s->options; | |
3525 | ret->mode = s->mode; | |
3526 | SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); | |
3527 | SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); | |
3528 | ret->msg_callback = s->msg_callback; | |
3529 | ret->msg_callback_arg = s->msg_callback_arg; | |
3530 | SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s)); | |
3531 | SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); | |
3532 | ret->generate_session_id = s->generate_session_id; | |
3533 | ||
3534 | SSL_set_info_callback(ret, SSL_get_info_callback(s)); | |
3535 | ||
3536 | /* copy app data, a little dangerous perhaps */ | |
3537 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data)) | |
3538 | goto err; | |
3539 | ||
3540 | /* setup rbio, and wbio */ | |
3541 | if (s->rbio != NULL) { | |
3542 | if (!BIO_dup_state(s->rbio, (char *)&ret->rbio)) | |
3543 | goto err; | |
3544 | } | |
3545 | if (s->wbio != NULL) { | |
3546 | if (s->wbio != s->rbio) { | |
3547 | if (!BIO_dup_state(s->wbio, (char *)&ret->wbio)) | |
3548 | goto err; | |
3549 | } else { | |
3550 | BIO_up_ref(ret->rbio); | |
3551 | ret->wbio = ret->rbio; | |
3552 | } | |
3553 | } | |
3554 | ||
3555 | ret->server = s->server; | |
3556 | if (s->handshake_func) { | |
3557 | if (s->server) | |
3558 | SSL_set_accept_state(ret); | |
3559 | else | |
3560 | SSL_set_connect_state(ret); | |
3561 | } | |
3562 | ret->shutdown = s->shutdown; | |
3563 | ret->hit = s->hit; | |
3564 | ||
3565 | ret->default_passwd_callback = s->default_passwd_callback; | |
3566 | ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata; | |
3567 | ||
3568 | X509_VERIFY_PARAM_inherit(ret->param, s->param); | |
3569 | ||
3570 | /* dup the cipher_list and cipher_list_by_id stacks */ | |
3571 | if (s->cipher_list != NULL) { | |
3572 | if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) | |
3573 | goto err; | |
3574 | } | |
3575 | if (s->cipher_list_by_id != NULL) | |
3576 | if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id)) | |
3577 | == NULL) | |
3578 | goto err; | |
3579 | ||
3580 | /* Dup the client_CA list */ | |
3581 | if (s->ca_names != NULL) { | |
3582 | if ((sk = sk_X509_NAME_dup(s->ca_names)) == NULL) | |
3583 | goto err; | |
3584 | ret->ca_names = sk; | |
3585 | for (i = 0; i < sk_X509_NAME_num(sk); i++) { | |
3586 | xn = sk_X509_NAME_value(sk, i); | |
3587 | if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) { | |
3588 | X509_NAME_free(xn); | |
3589 | goto err; | |
3590 | } | |
3591 | } | |
3592 | } | |
3593 | return ret; | |
3594 | ||
3595 | err: | |
3596 | SSL_free(ret); | |
3597 | return NULL; | |
3598 | } | |
3599 | ||
3600 | void ssl_clear_cipher_ctx(SSL *s) | |
3601 | { | |
3602 | if (s->enc_read_ctx != NULL) { | |
3603 | EVP_CIPHER_CTX_free(s->enc_read_ctx); | |
3604 | s->enc_read_ctx = NULL; | |
3605 | } | |
3606 | if (s->enc_write_ctx != NULL) { | |
3607 | EVP_CIPHER_CTX_free(s->enc_write_ctx); | |
3608 | s->enc_write_ctx = NULL; | |
3609 | } | |
3610 | #ifndef OPENSSL_NO_COMP | |
3611 | COMP_CTX_free(s->expand); | |
3612 | s->expand = NULL; | |
3613 | COMP_CTX_free(s->compress); | |
3614 | s->compress = NULL; | |
3615 | #endif | |
3616 | } | |
3617 | ||
3618 | X509 *SSL_get_certificate(const SSL *s) | |
3619 | { | |
3620 | if (s->cert != NULL) | |
3621 | return s->cert->key->x509; | |
3622 | else | |
3623 | return NULL; | |
3624 | } | |
3625 | ||
3626 | EVP_PKEY *SSL_get_privatekey(const SSL *s) | |
3627 | { | |
3628 | if (s->cert != NULL) | |
3629 | return s->cert->key->privatekey; | |
3630 | else | |
3631 | return NULL; | |
3632 | } | |
3633 | ||
3634 | X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) | |
3635 | { | |
3636 | if (ctx->cert != NULL) | |
3637 | return ctx->cert->key->x509; | |
3638 | else | |
3639 | return NULL; | |
3640 | } | |
3641 | ||
3642 | EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx) | |
3643 | { | |
3644 | if (ctx->cert != NULL) | |
3645 | return ctx->cert->key->privatekey; | |
3646 | else | |
3647 | return NULL; | |
3648 | } | |
3649 | ||
3650 | const SSL_CIPHER *SSL_get_current_cipher(const SSL *s) | |
3651 | { | |
3652 | if ((s->session != NULL) && (s->session->cipher != NULL)) | |
3653 | return s->session->cipher; | |
3654 | return NULL; | |
3655 | } | |
3656 | ||
3657 | const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s) | |
3658 | { | |
3659 | return s->s3->tmp.new_cipher; | |
3660 | } | |
3661 | ||
3662 | const COMP_METHOD *SSL_get_current_compression(SSL *s) | |
3663 | { | |
3664 | #ifndef OPENSSL_NO_COMP | |
3665 | return s->compress ? COMP_CTX_get_method(s->compress) : NULL; | |
3666 | #else | |
3667 | return NULL; | |
3668 | #endif | |
3669 | } | |
3670 | ||
3671 | const COMP_METHOD *SSL_get_current_expansion(SSL *s) | |
3672 | { | |
3673 | #ifndef OPENSSL_NO_COMP | |
3674 | return s->expand ? COMP_CTX_get_method(s->expand) : NULL; | |
3675 | #else | |
3676 | return NULL; | |
3677 | #endif | |
3678 | } | |
3679 | ||
3680 | int ssl_init_wbio_buffer(SSL *s) | |
3681 | { | |
3682 | BIO *bbio; | |
3683 | ||
3684 | if (s->bbio != NULL) { | |
3685 | /* Already buffered. */ | |
3686 | return 1; | |
3687 | } | |
3688 | ||
3689 | bbio = BIO_new(BIO_f_buffer()); | |
3690 | if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) { | |
3691 | BIO_free(bbio); | |
3692 | SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); | |
3693 | return 0; | |
3694 | } | |
3695 | s->bbio = bbio; | |
3696 | s->wbio = BIO_push(bbio, s->wbio); | |
3697 | ||
3698 | return 1; | |
3699 | } | |
3700 | ||
3701 | int ssl_free_wbio_buffer(SSL *s) | |
3702 | { | |
3703 | /* callers ensure s is never null */ | |
3704 | if (s->bbio == NULL) | |
3705 | return 1; | |
3706 | ||
3707 | s->wbio = BIO_pop(s->wbio); | |
3708 | if (!ossl_assert(s->wbio != NULL)) | |
3709 | return 0; | |
3710 | BIO_free(s->bbio); | |
3711 | s->bbio = NULL; | |
3712 | ||
3713 | return 1; | |
3714 | } | |
3715 | ||
3716 | void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) | |
3717 | { | |
3718 | ctx->quiet_shutdown = mode; | |
3719 | } | |
3720 | ||
3721 | int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) | |
3722 | { | |
3723 | return ctx->quiet_shutdown; | |
3724 | } | |
3725 | ||
3726 | void SSL_set_quiet_shutdown(SSL *s, int mode) | |
3727 | { | |
3728 | s->quiet_shutdown = mode; | |
3729 | } | |
3730 | ||
3731 | int SSL_get_quiet_shutdown(const SSL *s) | |
3732 | { | |
3733 | return s->quiet_shutdown; | |
3734 | } | |
3735 | ||
3736 | void SSL_set_shutdown(SSL *s, int mode) | |
3737 | { | |
3738 | s->shutdown = mode; | |
3739 | } | |
3740 | ||
3741 | int SSL_get_shutdown(const SSL *s) | |
3742 | { | |
3743 | return s->shutdown; | |
3744 | } | |
3745 | ||
3746 | int SSL_version(const SSL *s) | |
3747 | { | |
3748 | return s->version; | |
3749 | } | |
3750 | ||
3751 | int SSL_client_version(const SSL *s) | |
3752 | { | |
3753 | return s->client_version; | |
3754 | } | |
3755 | ||
3756 | SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl) | |
3757 | { | |
3758 | return ssl->ctx; | |
3759 | } | |
3760 | ||
3761 | SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx) | |
3762 | { | |
3763 | CERT *new_cert; | |
3764 | if (ssl->ctx == ctx) | |
3765 | return ssl->ctx; | |
3766 | if (ctx == NULL) | |
3767 | ctx = ssl->session_ctx; | |
3768 | new_cert = ssl_cert_dup(ctx->cert); | |
3769 | if (new_cert == NULL) { | |
3770 | return NULL; | |
3771 | } | |
3772 | ||
3773 | if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) { | |
3774 | ssl_cert_free(new_cert); | |
3775 | return NULL; | |
3776 | } | |
3777 | ||
3778 | ssl_cert_free(ssl->cert); | |
3779 | ssl->cert = new_cert; | |
3780 | ||
3781 | /* | |
3782 | * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH), | |
3783 | * so setter APIs must prevent invalid lengths from entering the system. | |
3784 | */ | |
3785 | if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx))) | |
3786 | return NULL; | |
3787 | ||
3788 | /* | |
3789 | * If the session ID context matches that of the parent SSL_CTX, | |
3790 | * inherit it from the new SSL_CTX as well. If however the context does | |
3791 | * not match (i.e., it was set per-ssl with SSL_set_session_id_context), | |
3792 | * leave it unchanged. | |
3793 | */ | |
3794 | if ((ssl->ctx != NULL) && | |
3795 | (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) && | |
3796 | (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) { | |
3797 | ssl->sid_ctx_length = ctx->sid_ctx_length; | |
3798 | memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx)); | |
3799 | } | |
3800 | ||
3801 | SSL_CTX_up_ref(ctx); | |
3802 | SSL_CTX_free(ssl->ctx); /* decrement reference count */ | |
3803 | ssl->ctx = ctx; | |
3804 | ||
3805 | return ssl->ctx; | |
3806 | } | |
3807 | ||
3808 | int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) | |
3809 | { | |
3810 | return X509_STORE_set_default_paths(ctx->cert_store); | |
3811 | } | |
3812 | ||
3813 | int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx) | |
3814 | { | |
3815 | X509_LOOKUP *lookup; | |
3816 | ||
3817 | lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir()); | |
3818 | if (lookup == NULL) | |
3819 | return 0; | |
3820 | X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT); | |
3821 | ||
3822 | /* Clear any errors if the default directory does not exist */ | |
3823 | ERR_clear_error(); | |
3824 | ||
3825 | return 1; | |
3826 | } | |
3827 | ||
3828 | int SSL_CTX_set_default_verify_file(SSL_CTX *ctx) | |
3829 | { | |
3830 | X509_LOOKUP *lookup; | |
3831 | ||
3832 | lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file()); | |
3833 | if (lookup == NULL) | |
3834 | return 0; | |
3835 | ||
3836 | X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT); | |
3837 | ||
3838 | /* Clear any errors if the default file does not exist */ | |
3839 | ERR_clear_error(); | |
3840 | ||
3841 | return 1; | |
3842 | } | |
3843 | ||
3844 | int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, | |
3845 | const char *CApath) | |
3846 | { | |
3847 | return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath); | |
3848 | } | |
3849 | ||
3850 | void SSL_set_info_callback(SSL *ssl, | |
3851 | void (*cb) (const SSL *ssl, int type, int val)) | |
3852 | { | |
3853 | ssl->info_callback = cb; | |
3854 | } | |
3855 | ||
3856 | /* | |
3857 | * One compiler (Diab DCC) doesn't like argument names in returned function | |
3858 | * pointer. | |
3859 | */ | |
3860 | void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ , | |
3861 | int /* type */ , | |
3862 | int /* val */ ) { | |
3863 | return ssl->info_callback; | |
3864 | } | |
3865 | ||
3866 | void SSL_set_verify_result(SSL *ssl, long arg) | |
3867 | { | |
3868 | ssl->verify_result = arg; | |
3869 | } | |
3870 | ||
3871 | long SSL_get_verify_result(const SSL *ssl) | |
3872 | { | |
3873 | return ssl->verify_result; | |
3874 | } | |
3875 | ||
3876 | size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen) | |
3877 | { | |
3878 | if (outlen == 0) | |
3879 | return sizeof(ssl->s3->client_random); | |
3880 | if (outlen > sizeof(ssl->s3->client_random)) | |
3881 | outlen = sizeof(ssl->s3->client_random); | |
3882 | memcpy(out, ssl->s3->client_random, outlen); | |
3883 | return outlen; | |
3884 | } | |
3885 | ||
3886 | size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen) | |
3887 | { | |
3888 | if (outlen == 0) | |
3889 | return sizeof(ssl->s3->server_random); | |
3890 | if (outlen > sizeof(ssl->s3->server_random)) | |
3891 | outlen = sizeof(ssl->s3->server_random); | |
3892 | memcpy(out, ssl->s3->server_random, outlen); | |
3893 | return outlen; | |
3894 | } | |
3895 | ||
3896 | size_t SSL_SESSION_get_master_key(const SSL_SESSION *session, | |
3897 | unsigned char *out, size_t outlen) | |
3898 | { | |
3899 | if (outlen == 0) | |
3900 | return session->master_key_length; | |
3901 | if (outlen > session->master_key_length) | |
3902 | outlen = session->master_key_length; | |
3903 | memcpy(out, session->master_key, outlen); | |
3904 | return outlen; | |
3905 | } | |
3906 | ||
3907 | int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in, | |
3908 | size_t len) | |
3909 | { | |
3910 | if (len > sizeof(sess->master_key)) | |
3911 | return 0; | |
3912 | ||
3913 | memcpy(sess->master_key, in, len); | |
3914 | sess->master_key_length = len; | |
3915 | return 1; | |
3916 | } | |
3917 | ||
3918 | ||
3919 | int SSL_set_ex_data(SSL *s, int idx, void *arg) | |
3920 | { | |
3921 | return CRYPTO_set_ex_data(&s->ex_data, idx, arg); | |
3922 | } | |
3923 | ||
3924 | void *SSL_get_ex_data(const SSL *s, int idx) | |
3925 | { | |
3926 | return CRYPTO_get_ex_data(&s->ex_data, idx); | |
3927 | } | |
3928 | ||
3929 | int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) | |
3930 | { | |
3931 | return CRYPTO_set_ex_data(&s->ex_data, idx, arg); | |
3932 | } | |
3933 | ||
3934 | void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) | |
3935 | { | |
3936 | return CRYPTO_get_ex_data(&s->ex_data, idx); | |
3937 | } | |
3938 | ||
3939 | X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx) | |
3940 | { | |
3941 | return ctx->cert_store; | |
3942 | } | |
3943 | ||
3944 | void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) | |
3945 | { | |
3946 | X509_STORE_free(ctx->cert_store); | |
3947 | ctx->cert_store = store; | |
3948 | } | |
3949 | ||
3950 | void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store) | |
3951 | { | |
3952 | if (store != NULL) | |
3953 | X509_STORE_up_ref(store); | |
3954 | SSL_CTX_set_cert_store(ctx, store); | |
3955 | } | |
3956 | ||
3957 | int SSL_want(const SSL *s) | |
3958 | { | |
3959 | return s->rwstate; | |
3960 | } | |
3961 | ||
3962 | /** | |
3963 | * \brief Set the callback for generating temporary DH keys. | |
3964 | * \param ctx the SSL context. | |
3965 | * \param dh the callback | |
3966 | */ | |
3967 | ||
3968 | #ifndef OPENSSL_NO_DH | |
3969 | void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, | |
3970 | DH *(*dh) (SSL *ssl, int is_export, | |
3971 | int keylength)) | |
3972 | { | |
3973 | SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); | |
3974 | } | |
3975 | ||
3976 | void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export, | |
3977 | int keylength)) | |
3978 | { | |
3979 | SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); | |
3980 | } | |
3981 | #endif | |
3982 | ||
3983 | #ifndef OPENSSL_NO_PSK | |
3984 | int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint) | |
3985 | { | |
3986 | if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
3987 | SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); | |
3988 | return 0; | |
3989 | } | |
3990 | OPENSSL_free(ctx->cert->psk_identity_hint); | |
3991 | if (identity_hint != NULL) { | |
3992 | ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint); | |
3993 | if (ctx->cert->psk_identity_hint == NULL) | |
3994 | return 0; | |
3995 | } else | |
3996 | ctx->cert->psk_identity_hint = NULL; | |
3997 | return 1; | |
3998 | } | |
3999 | ||
4000 | int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint) | |
4001 | { | |
4002 | if (s == NULL) | |
4003 | return 0; | |
4004 | ||
4005 | if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { | |
4006 | SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); | |
4007 | return 0; | |
4008 | } | |
4009 | OPENSSL_free(s->cert->psk_identity_hint); | |
4010 | if (identity_hint != NULL) { | |
4011 | s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint); | |
4012 | if (s->cert->psk_identity_hint == NULL) | |
4013 | return 0; | |
4014 | } else | |
4015 | s->cert->psk_identity_hint = NULL; | |
4016 | return 1; | |
4017 | } | |
4018 | ||
4019 | const char *SSL_get_psk_identity_hint(const SSL *s) | |
4020 | { | |
4021 | if (s == NULL || s->session == NULL) | |
4022 | return NULL; | |
4023 | return s->session->psk_identity_hint; | |
4024 | } | |
4025 | ||
4026 | const char *SSL_get_psk_identity(const SSL *s) | |
4027 | { | |
4028 | if (s == NULL || s->session == NULL) | |
4029 | return NULL; | |
4030 | return s->session->psk_identity; | |
4031 | } | |
4032 | ||
4033 | void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb) | |
4034 | { | |
4035 | s->psk_client_callback = cb; | |
4036 | } | |
4037 | ||
4038 | void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb) | |
4039 | { | |
4040 | ctx->psk_client_callback = cb; | |
4041 | } | |
4042 | ||
4043 | void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb) | |
4044 | { | |
4045 | s->psk_server_callback = cb; | |
4046 | } | |
4047 | ||
4048 | void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb) | |
4049 | { | |
4050 | ctx->psk_server_callback = cb; | |
4051 | } | |
4052 | #endif | |
4053 | ||
4054 | void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb) | |
4055 | { | |
4056 | s->psk_find_session_cb = cb; | |
4057 | } | |
4058 | ||
4059 | void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx, | |
4060 | SSL_psk_find_session_cb_func cb) | |
4061 | { | |
4062 | ctx->psk_find_session_cb = cb; | |
4063 | } | |
4064 | ||
4065 | void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb) | |
4066 | { | |
4067 | s->psk_use_session_cb = cb; | |
4068 | } | |
4069 | ||
4070 | void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx, | |
4071 | SSL_psk_use_session_cb_func cb) | |
4072 | { | |
4073 | ctx->psk_use_session_cb = cb; | |
4074 | } | |
4075 | ||
4076 | void SSL_CTX_set_msg_callback(SSL_CTX *ctx, | |
4077 | void (*cb) (int write_p, int version, | |
4078 | int content_type, const void *buf, | |
4079 | size_t len, SSL *ssl, void *arg)) | |
4080 | { | |
4081 | SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); | |
4082 | } | |
4083 | ||
4084 | void SSL_set_msg_callback(SSL *ssl, | |
4085 | void (*cb) (int write_p, int version, | |
4086 | int content_type, const void *buf, | |
4087 | size_t len, SSL *ssl, void *arg)) | |
4088 | { | |
4089 | SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); | |
4090 | } | |
4091 | ||
4092 | void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, | |
4093 | int (*cb) (SSL *ssl, | |
4094 | int | |
4095 | is_forward_secure)) | |
4096 | { | |
4097 | SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB, | |
4098 | (void (*)(void))cb); | |
4099 | } | |
4100 | ||
4101 | void SSL_set_not_resumable_session_callback(SSL *ssl, | |
4102 | int (*cb) (SSL *ssl, | |
4103 | int is_forward_secure)) | |
4104 | { | |
4105 | SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB, | |
4106 | (void (*)(void))cb); | |
4107 | } | |
4108 | ||
4109 | void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx, | |
4110 | size_t (*cb) (SSL *ssl, int type, | |
4111 | size_t len, void *arg)) | |
4112 | { | |
4113 | ctx->record_padding_cb = cb; | |
4114 | } | |
4115 | ||
4116 | void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg) | |
4117 | { | |
4118 | ctx->record_padding_arg = arg; | |
4119 | } | |
4120 | ||
4121 | void *SSL_CTX_get_record_padding_callback_arg(SSL_CTX *ctx) | |
4122 | { | |
4123 | return ctx->record_padding_arg; | |
4124 | } | |
4125 | ||
4126 | int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size) | |
4127 | { | |
4128 | /* block size of 0 or 1 is basically no padding */ | |
4129 | if (block_size == 1) | |
4130 | ctx->block_padding = 0; | |
4131 | else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH) | |
4132 | ctx->block_padding = block_size; | |
4133 | else | |
4134 | return 0; | |
4135 | return 1; | |
4136 | } | |
4137 | ||
4138 | void SSL_set_record_padding_callback(SSL *ssl, | |
4139 | size_t (*cb) (SSL *ssl, int type, | |
4140 | size_t len, void *arg)) | |
4141 | { | |
4142 | ssl->record_padding_cb = cb; | |
4143 | } | |
4144 | ||
4145 | void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg) | |
4146 | { | |
4147 | ssl->record_padding_arg = arg; | |
4148 | } | |
4149 | ||
4150 | void *SSL_get_record_padding_callback_arg(SSL *ssl) | |
4151 | { | |
4152 | return ssl->record_padding_arg; | |
4153 | } | |
4154 | ||
4155 | int SSL_set_block_padding(SSL *ssl, size_t block_size) | |
4156 | { | |
4157 | /* block size of 0 or 1 is basically no padding */ | |
4158 | if (block_size == 1) | |
4159 | ssl->block_padding = 0; | |
4160 | else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH) | |
4161 | ssl->block_padding = block_size; | |
4162 | else | |
4163 | return 0; | |
4164 | return 1; | |
4165 | } | |
4166 | ||
4167 | /* | |
4168 | * Allocates new EVP_MD_CTX and sets pointer to it into given pointer | |
4169 | * variable, freeing EVP_MD_CTX previously stored in that variable, if any. | |
4170 | * If EVP_MD pointer is passed, initializes ctx with this |md|. | |
4171 | * Returns the newly allocated ctx; | |
4172 | */ | |
4173 | ||
4174 | EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md) | |
4175 | { | |
4176 | ssl_clear_hash_ctx(hash); | |
4177 | *hash = EVP_MD_CTX_new(); | |
4178 | if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) { | |
4179 | EVP_MD_CTX_free(*hash); | |
4180 | *hash = NULL; | |
4181 | return NULL; | |
4182 | } | |
4183 | return *hash; | |
4184 | } | |
4185 | ||
4186 | void ssl_clear_hash_ctx(EVP_MD_CTX **hash) | |
4187 | { | |
4188 | ||
4189 | EVP_MD_CTX_free(*hash); | |
4190 | *hash = NULL; | |
4191 | } | |
4192 | ||
4193 | /* Retrieve handshake hashes */ | |
4194 | int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen, | |
4195 | size_t *hashlen) | |
4196 | { | |
4197 | EVP_MD_CTX *ctx = NULL; | |
4198 | EVP_MD_CTX *hdgst = s->s3->handshake_dgst; | |
4199 | int hashleni = EVP_MD_CTX_size(hdgst); | |
4200 | int ret = 0; | |
4201 | ||
4202 | if (hashleni < 0 || (size_t)hashleni > outlen) | |
4203 | goto err; | |
4204 | ||
4205 | ctx = EVP_MD_CTX_new(); | |
4206 | if (ctx == NULL) | |
4207 | goto err; | |
4208 | ||
4209 | if (!EVP_MD_CTX_copy_ex(ctx, hdgst) | |
4210 | || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) | |
4211 | goto err; | |
4212 | ||
4213 | *hashlen = hashleni; | |
4214 | ||
4215 | ret = 1; | |
4216 | err: | |
4217 | EVP_MD_CTX_free(ctx); | |
4218 | return ret; | |
4219 | } | |
4220 | ||
4221 | int SSL_session_reused(SSL *s) | |
4222 | { | |
4223 | return s->hit; | |
4224 | } | |
4225 | ||
4226 | int SSL_is_server(const SSL *s) | |
4227 | { | |
4228 | return s->server; | |
4229 | } | |
4230 | ||
4231 | #if OPENSSL_API_COMPAT < 0x10100000L | |
4232 | void SSL_set_debug(SSL *s, int debug) | |
4233 | { | |
4234 | /* Old function was do-nothing anyway... */ | |
4235 | (void)s; | |
4236 | (void)debug; | |
4237 | } | |
4238 | #endif | |
4239 | ||
4240 | void SSL_set_security_level(SSL *s, int level) | |
4241 | { | |
4242 | s->cert->sec_level = level; | |
4243 | } | |
4244 | ||
4245 | int SSL_get_security_level(const SSL *s) | |
4246 | { | |
4247 | return s->cert->sec_level; | |
4248 | } | |
4249 | ||
4250 | void SSL_set_security_callback(SSL *s, | |
4251 | int (*cb) (const SSL *s, const SSL_CTX *ctx, | |
4252 | int op, int bits, int nid, | |
4253 | void *other, void *ex)) | |
4254 | { | |
4255 | s->cert->sec_cb = cb; | |
4256 | } | |
4257 | ||
4258 | int (*SSL_get_security_callback(const SSL *s)) (const SSL *s, | |
4259 | const SSL_CTX *ctx, int op, | |
4260 | int bits, int nid, void *other, | |
4261 | void *ex) { | |
4262 | return s->cert->sec_cb; | |
4263 | } | |
4264 | ||
4265 | void SSL_set0_security_ex_data(SSL *s, void *ex) | |
4266 | { | |
4267 | s->cert->sec_ex = ex; | |
4268 | } | |
4269 | ||
4270 | void *SSL_get0_security_ex_data(const SSL *s) | |
4271 | { | |
4272 | return s->cert->sec_ex; | |
4273 | } | |
4274 | ||
4275 | void SSL_CTX_set_security_level(SSL_CTX *ctx, int level) | |
4276 | { | |
4277 | ctx->cert->sec_level = level; | |
4278 | } | |
4279 | ||
4280 | int SSL_CTX_get_security_level(const SSL_CTX *ctx) | |
4281 | { | |
4282 | return ctx->cert->sec_level; | |
4283 | } | |
4284 | ||
4285 | void SSL_CTX_set_security_callback(SSL_CTX *ctx, | |
4286 | int (*cb) (const SSL *s, const SSL_CTX *ctx, | |
4287 | int op, int bits, int nid, | |
4288 | void *other, void *ex)) | |
4289 | { | |
4290 | ctx->cert->sec_cb = cb; | |
4291 | } | |
4292 | ||
4293 | int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s, | |
4294 | const SSL_CTX *ctx, | |
4295 | int op, int bits, | |
4296 | int nid, | |
4297 | void *other, | |
4298 | void *ex) { | |
4299 | return ctx->cert->sec_cb; | |
4300 | } | |
4301 | ||
4302 | void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex) | |
4303 | { | |
4304 | ctx->cert->sec_ex = ex; | |
4305 | } | |
4306 | ||
4307 | void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx) | |
4308 | { | |
4309 | return ctx->cert->sec_ex; | |
4310 | } | |
4311 | ||
4312 | /* | |
4313 | * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that | |
4314 | * can return unsigned long, instead of the generic long return value from the | |
4315 | * control interface. | |
4316 | */ | |
4317 | unsigned long SSL_CTX_get_options(const SSL_CTX *ctx) | |
4318 | { | |
4319 | return ctx->options; | |
4320 | } | |
4321 | ||
4322 | unsigned long SSL_get_options(const SSL *s) | |
4323 | { | |
4324 | return s->options; | |
4325 | } | |
4326 | ||
4327 | unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op) | |
4328 | { | |
4329 | return ctx->options |= op; | |
4330 | } | |
4331 | ||
4332 | unsigned long SSL_set_options(SSL *s, unsigned long op) | |
4333 | { | |
4334 | return s->options |= op; | |
4335 | } | |
4336 | ||
4337 | unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op) | |
4338 | { | |
4339 | return ctx->options &= ~op; | |
4340 | } | |
4341 | ||
4342 | unsigned long SSL_clear_options(SSL *s, unsigned long op) | |
4343 | { | |
4344 | return s->options &= ~op; | |
4345 | } | |
4346 | ||
4347 | STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s) | |
4348 | { | |
4349 | return s->verified_chain; | |
4350 | } | |
4351 | ||
4352 | IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id); | |
4353 | ||
4354 | #ifndef OPENSSL_NO_CT | |
4355 | ||
4356 | /* | |
4357 | * Moves SCTs from the |src| stack to the |dst| stack. | |
4358 | * The source of each SCT will be set to |origin|. | |
4359 | * If |dst| points to a NULL pointer, a new stack will be created and owned by | |
4360 | * the caller. | |
4361 | * Returns the number of SCTs moved, or a negative integer if an error occurs. | |
4362 | */ | |
4363 | static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src, | |
4364 | sct_source_t origin) | |
4365 | { | |
4366 | int scts_moved = 0; | |
4367 | SCT *sct = NULL; | |
4368 | ||
4369 | if (*dst == NULL) { | |
4370 | *dst = sk_SCT_new_null(); | |
4371 | if (*dst == NULL) { | |
4372 | SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE); | |
4373 | goto err; | |
4374 | } | |
4375 | } | |
4376 | ||
4377 | while ((sct = sk_SCT_pop(src)) != NULL) { | |
4378 | if (SCT_set_source(sct, origin) != 1) | |
4379 | goto err; | |
4380 | ||
4381 | if (sk_SCT_push(*dst, sct) <= 0) | |
4382 | goto err; | |
4383 | scts_moved += 1; | |
4384 | } | |
4385 | ||
4386 | return scts_moved; | |
4387 | err: | |
4388 | if (sct != NULL) | |
4389 | sk_SCT_push(src, sct); /* Put the SCT back */ | |
4390 | return -1; | |
4391 | } | |
4392 | ||
4393 | /* | |
4394 | * Look for data collected during ServerHello and parse if found. | |
4395 | * Returns the number of SCTs extracted. | |
4396 | */ | |
4397 | static int ct_extract_tls_extension_scts(SSL *s) | |
4398 | { | |
4399 | int scts_extracted = 0; | |
4400 | ||
4401 | if (s->ext.scts != NULL) { | |
4402 | const unsigned char *p = s->ext.scts; | |
4403 | STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len); | |
4404 | ||
4405 | scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION); | |
4406 | ||
4407 | SCT_LIST_free(scts); | |
4408 | } | |
4409 | ||
4410 | return scts_extracted; | |
4411 | } | |
4412 | ||
4413 | /* | |
4414 | * Checks for an OCSP response and then attempts to extract any SCTs found if it | |
4415 | * contains an SCT X509 extension. They will be stored in |s->scts|. | |
4416 | * Returns: | |
4417 | * - The number of SCTs extracted, assuming an OCSP response exists. | |
4418 | * - 0 if no OCSP response exists or it contains no SCTs. | |
4419 | * - A negative integer if an error occurs. | |
4420 | */ | |
4421 | static int ct_extract_ocsp_response_scts(SSL *s) | |
4422 | { | |
4423 | # ifndef OPENSSL_NO_OCSP | |
4424 | int scts_extracted = 0; | |
4425 | const unsigned char *p; | |
4426 | OCSP_BASICRESP *br = NULL; | |
4427 | OCSP_RESPONSE *rsp = NULL; | |
4428 | STACK_OF(SCT) *scts = NULL; | |
4429 | int i; | |
4430 | ||
4431 | if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0) | |
4432 | goto err; | |
4433 | ||
4434 | p = s->ext.ocsp.resp; | |
4435 | rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len); | |
4436 | if (rsp == NULL) | |
4437 | goto err; | |
4438 | ||
4439 | br = OCSP_response_get1_basic(rsp); | |
4440 | if (br == NULL) | |
4441 | goto err; | |
4442 | ||
4443 | for (i = 0; i < OCSP_resp_count(br); ++i) { | |
4444 | OCSP_SINGLERESP *single = OCSP_resp_get0(br, i); | |
4445 | ||
4446 | if (single == NULL) | |
4447 | continue; | |
4448 | ||
4449 | scts = | |
4450 | OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL); | |
4451 | scts_extracted = | |
4452 | ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE); | |
4453 | if (scts_extracted < 0) | |
4454 | goto err; | |
4455 | } | |
4456 | err: | |
4457 | SCT_LIST_free(scts); | |
4458 | OCSP_BASICRESP_free(br); | |
4459 | OCSP_RESPONSE_free(rsp); | |
4460 | return scts_extracted; | |
4461 | # else | |
4462 | /* Behave as if no OCSP response exists */ | |
4463 | return 0; | |
4464 | # endif | |
4465 | } | |
4466 | ||
4467 | /* | |
4468 | * Attempts to extract SCTs from the peer certificate. | |
4469 | * Return the number of SCTs extracted, or a negative integer if an error | |
4470 | * occurs. | |
4471 | */ | |
4472 | static int ct_extract_x509v3_extension_scts(SSL *s) | |
4473 | { | |
4474 | int scts_extracted = 0; | |
4475 | X509 *cert = s->session != NULL ? s->session->peer : NULL; | |
4476 | ||
4477 | if (cert != NULL) { | |
4478 | STACK_OF(SCT) *scts = | |
4479 | X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL); | |
4480 | ||
4481 | scts_extracted = | |
4482 | ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION); | |
4483 | ||
4484 | SCT_LIST_free(scts); | |
4485 | } | |
4486 | ||
4487 | return scts_extracted; | |
4488 | } | |
4489 | ||
4490 | /* | |
4491 | * Attempts to find all received SCTs by checking TLS extensions, the OCSP | |
4492 | * response (if it exists) and X509v3 extensions in the certificate. | |
4493 | * Returns NULL if an error occurs. | |
4494 | */ | |
4495 | const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s) | |
4496 | { | |
4497 | if (!s->scts_parsed) { | |
4498 | if (ct_extract_tls_extension_scts(s) < 0 || | |
4499 | ct_extract_ocsp_response_scts(s) < 0 || | |
4500 | ct_extract_x509v3_extension_scts(s) < 0) | |
4501 | goto err; | |
4502 | ||
4503 | s->scts_parsed = 1; | |
4504 | } | |
4505 | return s->scts; | |
4506 | err: | |
4507 | return NULL; | |
4508 | } | |
4509 | ||
4510 | static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx, | |
4511 | const STACK_OF(SCT) *scts, void *unused_arg) | |
4512 | { | |
4513 | return 1; | |
4514 | } | |
4515 | ||
4516 | static int ct_strict(const CT_POLICY_EVAL_CTX * ctx, | |
4517 | const STACK_OF(SCT) *scts, void *unused_arg) | |
4518 | { | |
4519 | int count = scts != NULL ? sk_SCT_num(scts) : 0; | |
4520 | int i; | |
4521 | ||
4522 | for (i = 0; i < count; ++i) { | |
4523 | SCT *sct = sk_SCT_value(scts, i); | |
4524 | int status = SCT_get_validation_status(sct); | |
4525 | ||
4526 | if (status == SCT_VALIDATION_STATUS_VALID) | |
4527 | return 1; | |
4528 | } | |
4529 | SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS); | |
4530 | return 0; | |
4531 | } | |
4532 | ||
4533 | int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback, | |
4534 | void *arg) | |
4535 | { | |
4536 | /* | |
4537 | * Since code exists that uses the custom extension handler for CT, look | |
4538 | * for this and throw an error if they have already registered to use CT. | |
4539 | */ | |
4540 | if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx, | |
4541 | TLSEXT_TYPE_signed_certificate_timestamp)) | |
4542 | { | |
4543 | SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK, | |
4544 | SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED); | |
4545 | return 0; | |
4546 | } | |
4547 | ||
4548 | if (callback != NULL) { | |
4549 | /* | |
4550 | * If we are validating CT, then we MUST accept SCTs served via OCSP | |
4551 | */ | |
4552 | if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp)) | |
4553 | return 0; | |
4554 | } | |
4555 | ||
4556 | s->ct_validation_callback = callback; | |
4557 | s->ct_validation_callback_arg = arg; | |
4558 | ||
4559 | return 1; | |
4560 | } | |
4561 | ||
4562 | int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx, | |
4563 | ssl_ct_validation_cb callback, void *arg) | |
4564 | { | |
4565 | /* | |
4566 | * Since code exists that uses the custom extension handler for CT, look for | |
4567 | * this and throw an error if they have already registered to use CT. | |
4568 | */ | |
4569 | if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx, | |
4570 | TLSEXT_TYPE_signed_certificate_timestamp)) | |
4571 | { | |
4572 | SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK, | |
4573 | SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED); | |
4574 | return 0; | |
4575 | } | |
4576 | ||
4577 | ctx->ct_validation_callback = callback; | |
4578 | ctx->ct_validation_callback_arg = arg; | |
4579 | return 1; | |
4580 | } | |
4581 | ||
4582 | int SSL_ct_is_enabled(const SSL *s) | |
4583 | { | |
4584 | return s->ct_validation_callback != NULL; | |
4585 | } | |
4586 | ||
4587 | int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx) | |
4588 | { | |
4589 | return ctx->ct_validation_callback != NULL; | |
4590 | } | |
4591 | ||
4592 | int ssl_validate_ct(SSL *s) | |
4593 | { | |
4594 | int ret = 0; | |
4595 | X509 *cert = s->session != NULL ? s->session->peer : NULL; | |
4596 | X509 *issuer; | |
4597 | SSL_DANE *dane = &s->dane; | |
4598 | CT_POLICY_EVAL_CTX *ctx = NULL; | |
4599 | const STACK_OF(SCT) *scts; | |
4600 | ||
4601 | /* | |
4602 | * If no callback is set, the peer is anonymous, or its chain is invalid, | |
4603 | * skip SCT validation - just return success. Applications that continue | |
4604 | * handshakes without certificates, with unverified chains, or pinned leaf | |
4605 | * certificates are outside the scope of the WebPKI and CT. | |
4606 | * | |
4607 | * The above exclusions notwithstanding the vast majority of peers will | |
4608 | * have rather ordinary certificate chains validated by typical | |
4609 | * applications that perform certificate verification and therefore will | |
4610 | * process SCTs when enabled. | |
4611 | */ | |
4612 | if (s->ct_validation_callback == NULL || cert == NULL || | |
4613 | s->verify_result != X509_V_OK || | |
4614 | s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1) | |
4615 | return 1; | |
4616 | ||
4617 | /* | |
4618 | * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3) | |
4619 | * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2 | |
4620 | */ | |
4621 | if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) { | |
4622 | switch (dane->mtlsa->usage) { | |
4623 | case DANETLS_USAGE_DANE_TA: | |
4624 | case DANETLS_USAGE_DANE_EE: | |
4625 | return 1; | |
4626 | } | |
4627 | } | |
4628 | ||
4629 | ctx = CT_POLICY_EVAL_CTX_new(); | |
4630 | if (ctx == NULL) { | |
4631 | SSLerr(SSL_F_SSL_VALIDATE_CT, ERR_R_MALLOC_FAILURE); | |
4632 | goto end; | |
4633 | } | |
4634 | ||
4635 | issuer = sk_X509_value(s->verified_chain, 1); | |
4636 | CT_POLICY_EVAL_CTX_set1_cert(ctx, cert); | |
4637 | CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer); | |
4638 | CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store); | |
4639 | CT_POLICY_EVAL_CTX_set_time( | |
4640 | ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000); | |
4641 | ||
4642 | scts = SSL_get0_peer_scts(s); | |
4643 | ||
4644 | /* | |
4645 | * This function returns success (> 0) only when all the SCTs are valid, 0 | |
4646 | * when some are invalid, and < 0 on various internal errors (out of | |
4647 | * memory, etc.). Having some, or even all, invalid SCTs is not sufficient | |
4648 | * reason to abort the handshake, that decision is up to the callback. | |
4649 | * Therefore, we error out only in the unexpected case that the return | |
4650 | * value is negative. | |
4651 | * | |
4652 | * XXX: One might well argue that the return value of this function is an | |
4653 | * unfortunate design choice. Its job is only to determine the validation | |
4654 | * status of each of the provided SCTs. So long as it correctly separates | |
4655 | * the wheat from the chaff it should return success. Failure in this case | |
4656 | * ought to correspond to an inability to carry out its duties. | |
4657 | */ | |
4658 | if (SCT_LIST_validate(scts, ctx) < 0) { | |
4659 | SSLerr(SSL_F_SSL_VALIDATE_CT, SSL_R_SCT_VERIFICATION_FAILED); | |
4660 | goto end; | |
4661 | } | |
4662 | ||
4663 | ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg); | |
4664 | if (ret < 0) | |
4665 | ret = 0; /* This function returns 0 on failure */ | |
4666 | ||
4667 | end: | |
4668 | CT_POLICY_EVAL_CTX_free(ctx); | |
4669 | /* | |
4670 | * With SSL_VERIFY_NONE the session may be cached and re-used despite a | |
4671 | * failure return code here. Also the application may wish the complete | |
4672 | * the handshake, and then disconnect cleanly at a higher layer, after | |
4673 | * checking the verification status of the completed connection. | |
4674 | * | |
4675 | * We therefore force a certificate verification failure which will be | |
4676 | * visible via SSL_get_verify_result() and cached as part of any resumed | |
4677 | * session. | |
4678 | * | |
4679 | * Note: the permissive callback is for information gathering only, always | |
4680 | * returns success, and does not affect verification status. Only the | |
4681 | * strict callback or a custom application-specified callback can trigger | |
4682 | * connection failure or record a verification error. | |
4683 | */ | |
4684 | if (ret <= 0) | |
4685 | s->verify_result = X509_V_ERR_NO_VALID_SCTS; | |
4686 | return ret; | |
4687 | } | |
4688 | ||
4689 | int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode) | |
4690 | { | |
4691 | switch (validation_mode) { | |
4692 | default: | |
4693 | SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE); | |
4694 | return 0; | |
4695 | case SSL_CT_VALIDATION_PERMISSIVE: | |
4696 | return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL); | |
4697 | case SSL_CT_VALIDATION_STRICT: | |
4698 | return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL); | |
4699 | } | |
4700 | } | |
4701 | ||
4702 | int SSL_enable_ct(SSL *s, int validation_mode) | |
4703 | { | |
4704 | switch (validation_mode) { | |
4705 | default: | |
4706 | SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE); | |
4707 | return 0; | |
4708 | case SSL_CT_VALIDATION_PERMISSIVE: | |
4709 | return SSL_set_ct_validation_callback(s, ct_permissive, NULL); | |
4710 | case SSL_CT_VALIDATION_STRICT: | |
4711 | return SSL_set_ct_validation_callback(s, ct_strict, NULL); | |
4712 | } | |
4713 | } | |
4714 | ||
4715 | int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx) | |
4716 | { | |
4717 | return CTLOG_STORE_load_default_file(ctx->ctlog_store); | |
4718 | } | |
4719 | ||
4720 | int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path) | |
4721 | { | |
4722 | return CTLOG_STORE_load_file(ctx->ctlog_store, path); | |
4723 | } | |
4724 | ||
4725 | void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs) | |
4726 | { | |
4727 | CTLOG_STORE_free(ctx->ctlog_store); | |
4728 | ctx->ctlog_store = logs; | |
4729 | } | |
4730 | ||
4731 | const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx) | |
4732 | { | |
4733 | return ctx->ctlog_store; | |
4734 | } | |
4735 | ||
4736 | #endif /* OPENSSL_NO_CT */ | |
4737 | ||
4738 | void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb, | |
4739 | void *arg) | |
4740 | { | |
4741 | c->client_hello_cb = cb; | |
4742 | c->client_hello_cb_arg = arg; | |
4743 | } | |
4744 | ||
4745 | int SSL_client_hello_isv2(SSL *s) | |
4746 | { | |
4747 | if (s->clienthello == NULL) | |
4748 | return 0; | |
4749 | return s->clienthello->isv2; | |
4750 | } | |
4751 | ||
4752 | unsigned int SSL_client_hello_get0_legacy_version(SSL *s) | |
4753 | { | |
4754 | if (s->clienthello == NULL) | |
4755 | return 0; | |
4756 | return s->clienthello->legacy_version; | |
4757 | } | |
4758 | ||
4759 | size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out) | |
4760 | { | |
4761 | if (s->clienthello == NULL) | |
4762 | return 0; | |
4763 | if (out != NULL) | |
4764 | *out = s->clienthello->random; | |
4765 | return SSL3_RANDOM_SIZE; | |
4766 | } | |
4767 | ||
4768 | size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out) | |
4769 | { | |
4770 | if (s->clienthello == NULL) | |
4771 | return 0; | |
4772 | if (out != NULL) | |
4773 | *out = s->clienthello->session_id; | |
4774 | return s->clienthello->session_id_len; | |
4775 | } | |
4776 | ||
4777 | size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out) | |
4778 | { | |
4779 | if (s->clienthello == NULL) | |
4780 | return 0; | |
4781 | if (out != NULL) | |
4782 | *out = PACKET_data(&s->clienthello->ciphersuites); | |
4783 | return PACKET_remaining(&s->clienthello->ciphersuites); | |
4784 | } | |
4785 | ||
4786 | size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out) | |
4787 | { | |
4788 | if (s->clienthello == NULL) | |
4789 | return 0; | |
4790 | if (out != NULL) | |
4791 | *out = s->clienthello->compressions; | |
4792 | return s->clienthello->compressions_len; | |
4793 | } | |
4794 | ||
4795 | int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen) | |
4796 | { | |
4797 | RAW_EXTENSION *ext; | |
4798 | int *present; | |
4799 | size_t num = 0, i; | |
4800 | ||
4801 | if (s->clienthello == NULL || out == NULL || outlen == NULL) | |
4802 | return 0; | |
4803 | for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) { | |
4804 | ext = s->clienthello->pre_proc_exts + i; | |
4805 | if (ext->present) | |
4806 | num++; | |
4807 | } | |
4808 | present = OPENSSL_malloc(sizeof(*present) * num); | |
4809 | if (present == NULL) | |
4810 | return 0; | |
4811 | for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) { | |
4812 | ext = s->clienthello->pre_proc_exts + i; | |
4813 | if (ext->present) { | |
4814 | if (ext->received_order >= num) | |
4815 | goto err; | |
4816 | present[ext->received_order] = ext->type; | |
4817 | } | |
4818 | } | |
4819 | *out = present; | |
4820 | *outlen = num; | |
4821 | return 1; | |
4822 | err: | |
4823 | OPENSSL_free(present); | |
4824 | return 0; | |
4825 | } | |
4826 | ||
4827 | int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out, | |
4828 | size_t *outlen) | |
4829 | { | |
4830 | size_t i; | |
4831 | RAW_EXTENSION *r; | |
4832 | ||
4833 | if (s->clienthello == NULL) | |
4834 | return 0; | |
4835 | for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) { | |
4836 | r = s->clienthello->pre_proc_exts + i; | |
4837 | if (r->present && r->type == type) { | |
4838 | if (out != NULL) | |
4839 | *out = PACKET_data(&r->data); | |
4840 | if (outlen != NULL) | |
4841 | *outlen = PACKET_remaining(&r->data); | |
4842 | return 1; | |
4843 | } | |
4844 | } | |
4845 | return 0; | |
4846 | } | |
4847 | ||
4848 | int SSL_free_buffers(SSL *ssl) | |
4849 | { | |
4850 | RECORD_LAYER *rl = &ssl->rlayer; | |
4851 | ||
4852 | if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl)) | |
4853 | return 0; | |
4854 | ||
4855 | RECORD_LAYER_release(rl); | |
4856 | return 1; | |
4857 | } | |
4858 | ||
4859 | int SSL_alloc_buffers(SSL *ssl) | |
4860 | { | |
4861 | return ssl3_setup_buffers(ssl); | |
4862 | } | |
4863 | ||
4864 | void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb) | |
4865 | { | |
4866 | ctx->keylog_callback = cb; | |
4867 | } | |
4868 | ||
4869 | SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx) | |
4870 | { | |
4871 | return ctx->keylog_callback; | |
4872 | } | |
4873 | ||
4874 | static int nss_keylog_int(const char *prefix, | |
4875 | SSL *ssl, | |
4876 | const uint8_t *parameter_1, | |
4877 | size_t parameter_1_len, | |
4878 | const uint8_t *parameter_2, | |
4879 | size_t parameter_2_len) | |
4880 | { | |
4881 | char *out = NULL; | |
4882 | char *cursor = NULL; | |
4883 | size_t out_len = 0; | |
4884 | size_t i; | |
4885 | size_t prefix_len; | |
4886 | ||
4887 | if (ssl->ctx->keylog_callback == NULL) return 1; | |
4888 | ||
4889 | /* | |
4890 | * Our output buffer will contain the following strings, rendered with | |
4891 | * space characters in between, terminated by a NULL character: first the | |
4892 | * prefix, then the first parameter, then the second parameter. The | |
4893 | * meaning of each parameter depends on the specific key material being | |
4894 | * logged. Note that the first and second parameters are encoded in | |
4895 | * hexadecimal, so we need a buffer that is twice their lengths. | |
4896 | */ | |
4897 | prefix_len = strlen(prefix); | |
4898 | out_len = prefix_len + (2*parameter_1_len) + (2*parameter_2_len) + 3; | |
4899 | if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) { | |
4900 | SSLerr(SSL_F_NSS_KEYLOG_INT, ERR_R_MALLOC_FAILURE); | |
4901 | return 0; | |
4902 | } | |
4903 | ||
4904 | strcpy(cursor, prefix); | |
4905 | cursor += prefix_len; | |
4906 | *cursor++ = ' '; | |
4907 | ||
4908 | for (i = 0; i < parameter_1_len; i++) { | |
4909 | sprintf(cursor, "%02x", parameter_1[i]); | |
4910 | cursor += 2; | |
4911 | } | |
4912 | *cursor++ = ' '; | |
4913 | ||
4914 | for (i = 0; i < parameter_2_len; i++) { | |
4915 | sprintf(cursor, "%02x", parameter_2[i]); | |
4916 | cursor += 2; | |
4917 | } | |
4918 | *cursor = '\0'; | |
4919 | ||
4920 | ssl->ctx->keylog_callback(ssl, (const char *)out); | |
4921 | OPENSSL_free(out); | |
4922 | return 1; | |
4923 | ||
4924 | } | |
4925 | ||
4926 | int ssl_log_rsa_client_key_exchange(SSL *ssl, | |
4927 | const uint8_t *encrypted_premaster, | |
4928 | size_t encrypted_premaster_len, | |
4929 | const uint8_t *premaster, | |
4930 | size_t premaster_len) | |
4931 | { | |
4932 | if (encrypted_premaster_len < 8) { | |
4933 | SSLerr(SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
4934 | return 0; | |
4935 | } | |
4936 | ||
4937 | /* We only want the first 8 bytes of the encrypted premaster as a tag. */ | |
4938 | return nss_keylog_int("RSA", | |
4939 | ssl, | |
4940 | encrypted_premaster, | |
4941 | 8, | |
4942 | premaster, | |
4943 | premaster_len); | |
4944 | } | |
4945 | ||
4946 | int ssl_log_secret(SSL *ssl, | |
4947 | const char *label, | |
4948 | const uint8_t *secret, | |
4949 | size_t secret_len) | |
4950 | { | |
4951 | return nss_keylog_int(label, | |
4952 | ssl, | |
4953 | ssl->s3->client_random, | |
4954 | SSL3_RANDOM_SIZE, | |
4955 | secret, | |
4956 | secret_len); | |
4957 | } | |
4958 | ||
4959 | #define SSLV2_CIPHER_LEN 3 | |
4960 | ||
4961 | int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format, | |
4962 | int *al) | |
4963 | { | |
4964 | int n; | |
4965 | ||
4966 | n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN; | |
4967 | ||
4968 | if (PACKET_remaining(cipher_suites) == 0) { | |
4969 | SSLerr(SSL_F_SSL_CACHE_CIPHERLIST, SSL_R_NO_CIPHERS_SPECIFIED); | |
4970 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
4971 | return 0; | |
4972 | } | |
4973 | ||
4974 | if (PACKET_remaining(cipher_suites) % n != 0) { | |
4975 | SSLerr(SSL_F_SSL_CACHE_CIPHERLIST, | |
4976 | SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); | |
4977 | *al = SSL_AD_DECODE_ERROR; | |
4978 | return 0; | |
4979 | } | |
4980 | ||
4981 | OPENSSL_free(s->s3->tmp.ciphers_raw); | |
4982 | s->s3->tmp.ciphers_raw = NULL; | |
4983 | s->s3->tmp.ciphers_rawlen = 0; | |
4984 | ||
4985 | if (sslv2format) { | |
4986 | size_t numciphers = PACKET_remaining(cipher_suites) / n; | |
4987 | PACKET sslv2ciphers = *cipher_suites; | |
4988 | unsigned int leadbyte; | |
4989 | unsigned char *raw; | |
4990 | ||
4991 | /* | |
4992 | * We store the raw ciphers list in SSLv3+ format so we need to do some | |
4993 | * preprocessing to convert the list first. If there are any SSLv2 only | |
4994 | * ciphersuites with a non-zero leading byte then we are going to | |
4995 | * slightly over allocate because we won't store those. But that isn't a | |
4996 | * problem. | |
4997 | */ | |
4998 | raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN); | |
4999 | s->s3->tmp.ciphers_raw = raw; | |
5000 | if (raw == NULL) { | |
5001 | *al = SSL_AD_INTERNAL_ERROR; | |
5002 | goto err; | |
5003 | } | |
5004 | for (s->s3->tmp.ciphers_rawlen = 0; | |
5005 | PACKET_remaining(&sslv2ciphers) > 0; | |
5006 | raw += TLS_CIPHER_LEN) { | |
5007 | if (!PACKET_get_1(&sslv2ciphers, &leadbyte) | |
5008 | || (leadbyte == 0 | |
5009 | && !PACKET_copy_bytes(&sslv2ciphers, raw, | |
5010 | TLS_CIPHER_LEN)) | |
5011 | || (leadbyte != 0 | |
5012 | && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) { | |
5013 | *al = SSL_AD_DECODE_ERROR; | |
5014 | OPENSSL_free(s->s3->tmp.ciphers_raw); | |
5015 | s->s3->tmp.ciphers_raw = NULL; | |
5016 | s->s3->tmp.ciphers_rawlen = 0; | |
5017 | goto err; | |
5018 | } | |
5019 | if (leadbyte == 0) | |
5020 | s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN; | |
5021 | } | |
5022 | } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw, | |
5023 | &s->s3->tmp.ciphers_rawlen)) { | |
5024 | *al = SSL_AD_INTERNAL_ERROR; | |
5025 | goto err; | |
5026 | } | |
5027 | return 1; | |
5028 | err: | |
5029 | return 0; | |
5030 | } | |
5031 | ||
5032 | int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len, | |
5033 | int isv2format, STACK_OF(SSL_CIPHER) **sk, | |
5034 | STACK_OF(SSL_CIPHER) **scsvs) | |
5035 | { | |
5036 | int alert; | |
5037 | PACKET pkt; | |
5038 | ||
5039 | if (!PACKET_buf_init(&pkt, bytes, len)) | |
5040 | return 0; | |
5041 | return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, &alert); | |
5042 | } | |
5043 | ||
5044 | int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites, | |
5045 | STACK_OF(SSL_CIPHER) **skp, | |
5046 | STACK_OF(SSL_CIPHER) **scsvs_out, | |
5047 | int sslv2format, int *al) | |
5048 | { | |
5049 | const SSL_CIPHER *c; | |
5050 | STACK_OF(SSL_CIPHER) *sk = NULL; | |
5051 | STACK_OF(SSL_CIPHER) *scsvs = NULL; | |
5052 | int n; | |
5053 | /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */ | |
5054 | unsigned char cipher[SSLV2_CIPHER_LEN]; | |
5055 | ||
5056 | n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN; | |
5057 | ||
5058 | if (PACKET_remaining(cipher_suites) == 0) { | |
5059 | SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED); | |
5060 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
5061 | return 0; | |
5062 | } | |
5063 | ||
5064 | if (PACKET_remaining(cipher_suites) % n != 0) { | |
5065 | SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, | |
5066 | SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); | |
5067 | *al = SSL_AD_DECODE_ERROR; | |
5068 | return 0; | |
5069 | } | |
5070 | ||
5071 | sk = sk_SSL_CIPHER_new_null(); | |
5072 | scsvs = sk_SSL_CIPHER_new_null(); | |
5073 | if (sk == NULL || scsvs == NULL) { | |
5074 | SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); | |
5075 | *al = SSL_AD_INTERNAL_ERROR; | |
5076 | goto err; | |
5077 | } | |
5078 | ||
5079 | while (PACKET_copy_bytes(cipher_suites, cipher, n)) { | |
5080 | /* | |
5081 | * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the | |
5082 | * first byte set to zero, while true SSLv2 ciphers have a non-zero | |
5083 | * first byte. We don't support any true SSLv2 ciphers, so skip them. | |
5084 | */ | |
5085 | if (sslv2format && cipher[0] != '\0') | |
5086 | continue; | |
5087 | ||
5088 | /* For SSLv2-compat, ignore leading 0-byte. */ | |
5089 | c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1); | |
5090 | if (c != NULL) { | |
5091 | if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) || | |
5092 | (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) { | |
5093 | SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); | |
5094 | *al = SSL_AD_INTERNAL_ERROR; | |
5095 | goto err; | |
5096 | } | |
5097 | } | |
5098 | } | |
5099 | if (PACKET_remaining(cipher_suites) > 0) { | |
5100 | *al = SSL_AD_DECODE_ERROR; | |
5101 | SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH); | |
5102 | goto err; | |
5103 | } | |
5104 | ||
5105 | if (skp != NULL) | |
5106 | *skp = sk; | |
5107 | else | |
5108 | sk_SSL_CIPHER_free(sk); | |
5109 | if (scsvs_out != NULL) | |
5110 | *scsvs_out = scsvs; | |
5111 | else | |
5112 | sk_SSL_CIPHER_free(scsvs); | |
5113 | return 1; | |
5114 | err: | |
5115 | sk_SSL_CIPHER_free(sk); | |
5116 | sk_SSL_CIPHER_free(scsvs); | |
5117 | return 0; | |
5118 | } | |
5119 | ||
5120 | int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data) | |
5121 | { | |
5122 | ctx->max_early_data = max_early_data; | |
5123 | ||
5124 | return 1; | |
5125 | } | |
5126 | ||
5127 | uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx) | |
5128 | { | |
5129 | return ctx->max_early_data; | |
5130 | } | |
5131 | ||
5132 | int SSL_set_max_early_data(SSL *s, uint32_t max_early_data) | |
5133 | { | |
5134 | s->max_early_data = max_early_data; | |
5135 | ||
5136 | return 1; | |
5137 | } | |
5138 | ||
5139 | uint32_t SSL_get_max_early_data(const SSL *s) | |
5140 | { | |
5141 | return s->max_early_data; | |
5142 | } | |
5143 | ||
5144 | int ssl_randbytes(SSL *s, unsigned char *rnd, size_t size) | |
5145 | { | |
5146 | if (s->drbg != NULL) { | |
5147 | /* | |
5148 | * Currently, it's the duty of the caller to serialize the generate | |
5149 | * requests to the DRBG. So formally we have to check whether | |
5150 | * s->drbg->lock != NULL and take the lock if this is the case. | |
5151 | * However, this DRBG is unique to a given SSL object, and we already | |
5152 | * require that SSL objects are only accessed by a single thread at | |
5153 | * a given time. Also, SSL DRBGs have no child DRBG, so there is | |
5154 | * no risk that this DRBG is accessed by a child DRBG in parallel | |
5155 | * for reseeding. As such, we can rely on the application's | |
5156 | * serialization of SSL accesses for the needed concurrency protection | |
5157 | * here. | |
5158 | */ | |
5159 | return RAND_DRBG_generate(s->drbg, rnd, size, 0, NULL, 0); | |
5160 | } | |
5161 | return RAND_bytes(rnd, (int)size); | |
5162 | } |