]>
Commit | Line | Data |
---|---|---|
34a4068c MC |
1 | /* |
2 | * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
1d367677 | 10 | #include <assert.h> |
34a4068c MC |
11 | #include <openssl/bio.h> |
12 | #include <openssl/ssl.h> | |
e2d5742b MC |
13 | #include <openssl/err.h> |
14 | #include <openssl/core_names.h> | |
1e76110b | 15 | #include <openssl/comp.h> |
91fe8ff0 | 16 | #include <openssl/ssl.h> |
e2d5742b | 17 | #include "internal/e_os.h" |
4030869d | 18 | #include "internal/packet.h" |
4840c2a5 MC |
19 | #include "../../ssl_local.h" |
20 | #include "../record_local.h" | |
50023e9b | 21 | #include "recmethod_local.h" |
e2d5742b | 22 | |
359affde MC |
23 | static void tls_int_free(OSSL_RECORD_LAYER *rl); |
24 | ||
e158ada6 MC |
25 | void SSL3_BUFFER_release(SSL3_BUFFER *b) |
26 | { | |
27 | OPENSSL_free(b->buf); | |
28 | b->buf = NULL; | |
29 | } | |
30 | ||
23c57f00 MC |
31 | static void SSL3_RECORD_release(SSL3_RECORD *r, size_t num_recs) |
32 | { | |
33 | size_t i; | |
34 | ||
35 | for (i = 0; i < num_recs; i++) { | |
36 | OPENSSL_free(r[i].comp); | |
37 | r[i].comp = NULL; | |
38 | } | |
39 | } | |
40 | ||
41 | void SSL3_RECORD_set_seq_num(SSL3_RECORD *r, const unsigned char *seq_num) | |
42 | { | |
43 | memcpy(r->seq_num, seq_num, SEQ_NUM_SIZE); | |
44 | } | |
45 | ||
50023e9b MC |
46 | void ossl_rlayer_fatal(OSSL_RECORD_LAYER *rl, int al, int reason, |
47 | const char *fmt, ...) | |
e2d5742b MC |
48 | { |
49 | va_list args; | |
50 | ||
51 | va_start(args, fmt); | |
52 | ERR_vset_error(ERR_LIB_SSL, reason, fmt, args); | |
53 | va_end(args); | |
54 | ||
55 | rl->alert = al; | |
56 | } | |
57 | ||
50023e9b MC |
58 | int ossl_set_tls_provider_parameters(OSSL_RECORD_LAYER *rl, |
59 | EVP_CIPHER_CTX *ctx, | |
60 | const EVP_CIPHER *ciph, | |
7f2f0ac7 | 61 | const EVP_MD *md) |
aedbb71b MC |
62 | { |
63 | /* | |
64 | * Provided cipher, the TLS padding/MAC removal is performed provider | |
65 | * side so we need to tell the ctx about our TLS version and mac size | |
66 | */ | |
67 | OSSL_PARAM params[3], *pprm = params; | |
68 | size_t macsize = 0; | |
69 | int imacsize = -1; | |
70 | ||
71 | if ((EVP_CIPHER_get_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0 | |
7f2f0ac7 | 72 | && !rl->use_etm) |
aedbb71b MC |
73 | imacsize = EVP_MD_get_size(md); |
74 | if (imacsize >= 0) | |
75 | macsize = (size_t)imacsize; | |
76 | ||
77 | *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION, | |
78 | &rl->version); | |
79 | *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE, | |
80 | &macsize); | |
81 | *pprm = OSSL_PARAM_construct_end(); | |
82 | ||
83 | if (!EVP_CIPHER_CTX_set_params(ctx, params)) { | |
7c293999 | 84 | ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR); |
aedbb71b MC |
85 | return 0; |
86 | } | |
87 | ||
88 | return 1; | |
89 | } | |
90 | ||
50023e9b MC |
91 | /* |
92 | * ssl3_cbc_record_digest_supported returns 1 iff |ctx| uses a hash function | |
93 | * which ssl3_cbc_digest_record supports. | |
aedbb71b | 94 | */ |
50023e9b | 95 | char ssl3_cbc_record_digest_supported(const EVP_MD_CTX *ctx) |
2b891e30 | 96 | { |
50023e9b MC |
97 | switch (EVP_MD_CTX_get_type(ctx)) { |
98 | case NID_md5: | |
99 | case NID_sha1: | |
100 | case NID_sha224: | |
101 | case NID_sha256: | |
102 | case NID_sha384: | |
103 | case NID_sha512: | |
2b891e30 | 104 | return 1; |
50023e9b | 105 | default: |
aedbb71b | 106 | return 0; |
aedbb71b | 107 | } |
aedbb71b MC |
108 | } |
109 | ||
976b263d | 110 | #ifndef OPENSSL_NO_COMP |
9b7fb65e | 111 | static int tls_allow_compression(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
112 | { |
113 | if (rl->options & SSL_OP_NO_COMPRESSION) | |
114 | return 0; | |
ed0e298f | 115 | |
b85ebc4b MC |
116 | return rl->security == NULL |
117 | || rl->security(rl->cbarg, SSL_SECOP_COMPRESSION, 0, 0, NULL); | |
e2d5742b | 118 | } |
976b263d | 119 | #endif |
e2d5742b | 120 | |
23bf52a4 MC |
121 | static void tls_release_write_buffer_int(OSSL_RECORD_LAYER *rl, size_t start) |
122 | { | |
123 | SSL3_BUFFER *wb; | |
124 | size_t pipes; | |
125 | ||
126 | pipes = rl->numwpipes; | |
127 | ||
128 | while (pipes > start) { | |
129 | wb = &rl->wbuf[pipes - 1]; | |
130 | ||
131 | if (SSL3_BUFFER_is_app_buffer(wb)) | |
132 | SSL3_BUFFER_set_app_buffer(wb, 0); | |
133 | else | |
134 | OPENSSL_free(wb->buf); | |
135 | wb->buf = NULL; | |
136 | pipes--; | |
137 | } | |
138 | } | |
139 | ||
bafe524b MC |
140 | int tls_setup_write_buffer(OSSL_RECORD_LAYER *rl, size_t numwpipes, |
141 | size_t firstlen, size_t nextlen) | |
151f313e MC |
142 | { |
143 | unsigned char *p; | |
144 | size_t align = 0, headerlen; | |
145 | SSL3_BUFFER *wb; | |
146 | size_t currpipe; | |
85b358b0 | 147 | size_t defltlen = 0; |
151f313e | 148 | |
85b358b0 | 149 | if (firstlen == 0 || (numwpipes > 1 && nextlen == 0)) { |
320145d5 | 150 | if (rl->isdtls) |
151f313e MC |
151 | headerlen = DTLS1_RT_HEADER_LENGTH + 1; |
152 | else | |
153 | headerlen = SSL3_RT_HEADER_LENGTH; | |
154 | ||
85b358b0 | 155 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
151f313e MC |
156 | align = SSL3_ALIGN_PAYLOAD - 1; |
157 | #endif | |
158 | ||
435d88d7 MC |
159 | defltlen = rl->max_frag_len + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD |
160 | + headerlen + align; | |
151f313e | 161 | #ifndef OPENSSL_NO_COMP |
9251c3c4 | 162 | if (tls_allow_compression(rl)) |
85b358b0 | 163 | defltlen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
151f313e MC |
164 | #endif |
165 | if (!(rl->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) | |
85b358b0 | 166 | defltlen += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; |
151f313e MC |
167 | } |
168 | ||
169 | wb = rl->wbuf; | |
170 | for (currpipe = 0; currpipe < numwpipes; currpipe++) { | |
171 | SSL3_BUFFER *thiswb = &wb[currpipe]; | |
85b358b0 MC |
172 | size_t len = (currpipe == 0) ? firstlen : nextlen; |
173 | ||
174 | if (len == 0) | |
175 | len = defltlen; | |
151f313e MC |
176 | |
177 | if (thiswb->len != len) { | |
178 | OPENSSL_free(thiswb->buf); | |
179 | thiswb->buf = NULL; /* force reallocation */ | |
180 | } | |
181 | ||
5bc226ab MC |
182 | p = thiswb->buf; |
183 | if (p == NULL) { | |
184 | p = OPENSSL_malloc(len); | |
185 | if (p == NULL) { | |
186 | if (rl->numwpipes < currpipe) | |
187 | rl->numwpipes = currpipe; | |
188 | /* | |
189 | * We've got a malloc failure, and we're still initialising | |
190 | * buffers. We assume we're so doomed that we won't even be able | |
191 | * to send an alert. | |
192 | */ | |
193 | RLAYERfatal(rl, SSL_AD_NO_ALERT, ERR_R_CRYPTO_LIB); | |
194 | return 0; | |
151f313e | 195 | } |
151f313e | 196 | } |
5bc226ab MC |
197 | memset(thiswb, 0, sizeof(SSL3_BUFFER)); |
198 | thiswb->buf = p; | |
199 | thiswb->len = len; | |
151f313e MC |
200 | } |
201 | ||
23bf52a4 MC |
202 | /* Free any previously allocated buffers that we are no longer using */ |
203 | tls_release_write_buffer_int(rl, currpipe); | |
204 | ||
205 | rl->numwpipes = numwpipes; | |
206 | ||
151f313e MC |
207 | return 1; |
208 | } | |
209 | ||
210 | static void tls_release_write_buffer(OSSL_RECORD_LAYER *rl) | |
211 | { | |
23bf52a4 | 212 | tls_release_write_buffer_int(rl, 0); |
e7694c69 MC |
213 | |
214 | rl->numwpipes = 0; | |
151f313e MC |
215 | } |
216 | ||
9b7fb65e | 217 | int tls_setup_read_buffer(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
218 | { |
219 | unsigned char *p; | |
220 | size_t len, align = 0, headerlen; | |
221 | SSL3_BUFFER *b; | |
222 | ||
223 | b = &rl->rbuf; | |
224 | ||
225 | if (rl->isdtls) | |
226 | headerlen = DTLS1_RT_HEADER_LENGTH; | |
227 | else | |
228 | headerlen = SSL3_RT_HEADER_LENGTH; | |
229 | ||
1704961c | 230 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
e2d5742b MC |
231 | align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); |
232 | #endif | |
233 | ||
234 | if (b->buf == NULL) { | |
435d88d7 MC |
235 | len = rl->max_frag_len |
236 | + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; | |
e2d5742b | 237 | #ifndef OPENSSL_NO_COMP |
9b7fb65e | 238 | if (tls_allow_compression(rl)) |
e2d5742b MC |
239 | len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
240 | #endif | |
8ccde3fc MC |
241 | |
242 | /* Ensure our buffer is large enough to support all our pipelines */ | |
243 | if (rl->max_pipelines > 1) | |
244 | len *= rl->max_pipelines; | |
245 | ||
e2d5742b MC |
246 | if (b->default_len > len) |
247 | len = b->default_len; | |
8ccde3fc | 248 | |
e2d5742b MC |
249 | if ((p = OPENSSL_malloc(len)) == NULL) { |
250 | /* | |
251 | * We've got a malloc failure, and we're still initialising buffers. | |
252 | * We assume we're so doomed that we won't even be able to send an | |
253 | * alert. | |
254 | */ | |
e077455e | 255 | RLAYERfatal(rl, SSL_AD_NO_ALERT, ERR_R_CRYPTO_LIB); |
e2d5742b MC |
256 | return 0; |
257 | } | |
258 | b->buf = p; | |
259 | b->len = len; | |
260 | } | |
261 | ||
262 | return 1; | |
263 | } | |
264 | ||
9b7fb65e | 265 | static int tls_release_read_buffer(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
266 | { |
267 | SSL3_BUFFER *b; | |
268 | ||
269 | b = &rl->rbuf; | |
1704961c | 270 | if ((rl->options & SSL_OP_CLEANSE_PLAINTEXT) != 0) |
e2d5742b MC |
271 | OPENSSL_cleanse(b->buf, b->len); |
272 | OPENSSL_free(b->buf); | |
273 | b->buf = NULL; | |
274 | return 1; | |
275 | } | |
276 | ||
277 | /* | |
278 | * Return values are as per SSL_read() | |
279 | */ | |
1853d20a MC |
280 | int tls_default_read_n(OSSL_RECORD_LAYER *rl, size_t n, size_t max, int extend, |
281 | int clearold, size_t *readbytes) | |
e2d5742b MC |
282 | { |
283 | /* | |
284 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
285 | * packet by another n bytes. The packet will be in the sub-array of | |
b0a9042e MC |
286 | * rl->rbuf.buf specified by rl->packet and rl->packet_length. (If |
287 | * rl->read_ahead is set, 'max' bytes may be stored in rbuf [plus | |
288 | * rl->packet_length bytes if extend == 1].) if clearold == 1, move the | |
289 | * packet to the start of the buffer; if clearold == 0 then leave any old | |
290 | * packets where they were | |
e2d5742b MC |
291 | */ |
292 | size_t len, left, align = 0; | |
293 | unsigned char *pkt; | |
294 | SSL3_BUFFER *rb; | |
295 | ||
296 | if (n == 0) | |
297 | return OSSL_RECORD_RETURN_NON_FATAL_ERR; | |
298 | ||
299 | rb = &rl->rbuf; | |
e2d5742b MC |
300 | left = rb->left; |
301 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 | |
302 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; | |
303 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); | |
304 | #endif | |
305 | ||
306 | if (!extend) { | |
307 | /* start with empty packet ... */ | |
8ccde3fc | 308 | if (left == 0) |
e2d5742b | 309 | rb->offset = align; |
8ccde3fc | 310 | |
e2d5742b MC |
311 | rl->packet = rb->buf + rb->offset; |
312 | rl->packet_length = 0; | |
313 | /* ... now we can act as if 'extend' was set */ | |
314 | } | |
315 | ||
316 | len = rl->packet_length; | |
317 | pkt = rb->buf + align; | |
318 | /* | |
319 | * Move any available bytes to front of buffer: 'len' bytes already | |
320 | * pointed to by 'packet', 'left' extra ones at the end | |
321 | */ | |
322 | if (rl->packet != pkt && clearold == 1) { | |
323 | memmove(pkt, rl->packet, len + left); | |
324 | rl->packet = pkt; | |
325 | rb->offset = len + align; | |
326 | } | |
327 | ||
328 | /* | |
329 | * For DTLS/UDP reads should not span multiple packets because the read | |
330 | * operation returns the whole packet at once (as long as it fits into | |
331 | * the buffer). | |
332 | */ | |
333 | if (rl->isdtls) { | |
f78c5199 MC |
334 | if (left == 0 && extend) { |
335 | /* | |
336 | * We received a record with a header but no body data. This will | |
337 | * get dumped. | |
338 | */ | |
339 | return OSSL_RECORD_RETURN_NON_FATAL_ERR; | |
340 | } | |
e2d5742b MC |
341 | if (left > 0 && n > left) |
342 | n = left; | |
343 | } | |
344 | ||
345 | /* if there is enough in the buffer from a previous read, take some */ | |
346 | if (left >= n) { | |
347 | rl->packet_length += n; | |
348 | rb->left = left - n; | |
349 | rb->offset += n; | |
350 | *readbytes = n; | |
351 | return OSSL_RECORD_RETURN_SUCCESS; | |
352 | } | |
353 | ||
354 | /* else we need to read more data */ | |
355 | ||
356 | if (n > rb->len - rb->offset) { | |
357 | /* does not happen */ | |
358 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
359 | return OSSL_RECORD_RETURN_FATAL; | |
360 | } | |
361 | ||
1853d20a MC |
362 | /* We always act like read_ahead is set for DTLS */ |
363 | if (!rl->read_ahead && !rl->isdtls) { | |
e2d5742b MC |
364 | /* ignore max parameter */ |
365 | max = n; | |
366 | } else { | |
367 | if (max < n) | |
368 | max = n; | |
369 | if (max > rb->len - rb->offset) | |
370 | max = rb->len - rb->offset; | |
371 | } | |
372 | ||
373 | while (left < n) { | |
374 | size_t bioread = 0; | |
375 | int ret; | |
359affde | 376 | BIO *bio = rl->prev != NULL ? rl->prev : rl->bio; |
e2d5742b MC |
377 | |
378 | /* | |
1704961c MC |
379 | * Now we have len+left bytes at the front of rl->rbuf.buf and |
380 | * need to read in more until we have len + n (up to len + max if | |
e2d5742b MC |
381 | * possible) |
382 | */ | |
383 | ||
384 | clear_sys_error(); | |
359affde MC |
385 | if (bio != NULL) { |
386 | ret = BIO_read(bio, pkt + len + left, max - left); | |
e2d5742b MC |
387 | if (ret > 0) { |
388 | bioread = ret; | |
389 | ret = OSSL_RECORD_RETURN_SUCCESS; | |
359affde MC |
390 | } else if (BIO_should_retry(bio)) { |
391 | if (rl->prev != NULL) { | |
392 | /* | |
393 | * We were reading from the previous epoch. Now there is no | |
394 | * more data, so swap to the actual transport BIO | |
395 | */ | |
396 | BIO_free(rl->prev); | |
397 | rl->prev = NULL; | |
398 | continue; | |
399 | } | |
e2d5742b | 400 | ret = OSSL_RECORD_RETURN_RETRY; |
359affde | 401 | } else if (BIO_eof(bio)) { |
e2d5742b MC |
402 | ret = OSSL_RECORD_RETURN_EOF; |
403 | } else { | |
404 | ret = OSSL_RECORD_RETURN_FATAL; | |
405 | } | |
406 | } else { | |
407 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_READ_BIO_NOT_SET); | |
408 | ret = OSSL_RECORD_RETURN_FATAL; | |
409 | } | |
410 | ||
411 | if (ret <= OSSL_RECORD_RETURN_RETRY) { | |
412 | rb->left = left; | |
3de76959 | 413 | if ((rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0 && !rl->isdtls) |
e2d5742b | 414 | if (len + left == 0) |
9b7fb65e | 415 | tls_release_read_buffer(rl); |
e2d5742b MC |
416 | return ret; |
417 | } | |
418 | left += bioread; | |
419 | /* | |
420 | * reads should *never* span multiple packets for DTLS because the | |
421 | * underlying transport protocol is message oriented as opposed to | |
422 | * byte oriented as in the TLS case. | |
423 | */ | |
424 | if (rl->isdtls) { | |
425 | if (n > left) | |
426 | n = left; /* makes the while condition false */ | |
427 | } | |
428 | } | |
429 | ||
430 | /* done reading, now the book-keeping */ | |
431 | rb->offset += n; | |
432 | rb->left = left - n; | |
433 | rl->packet_length += n; | |
434 | *readbytes = n; | |
435 | return OSSL_RECORD_RETURN_SUCCESS; | |
436 | } | |
437 | ||
4030869d MC |
438 | /* |
439 | * Peeks ahead into "read_ahead" data to see if we have a whole record waiting | |
440 | * for us in the buffer. | |
441 | */ | |
442 | static int tls_record_app_data_waiting(OSSL_RECORD_LAYER *rl) | |
443 | { | |
444 | SSL3_BUFFER *rbuf; | |
445 | size_t left, len; | |
446 | unsigned char *p; | |
447 | ||
448 | rbuf = &rl->rbuf; | |
449 | ||
450 | p = SSL3_BUFFER_get_buf(rbuf); | |
451 | if (p == NULL) | |
452 | return 0; | |
453 | ||
454 | left = SSL3_BUFFER_get_left(rbuf); | |
455 | ||
456 | if (left < SSL3_RT_HEADER_LENGTH) | |
457 | return 0; | |
458 | ||
459 | p += SSL3_BUFFER_get_offset(rbuf); | |
460 | ||
461 | /* | |
462 | * We only check the type and record length, we will sanity check version | |
463 | * etc later | |
464 | */ | |
465 | if (*p != SSL3_RT_APPLICATION_DATA) | |
466 | return 0; | |
467 | ||
468 | p += 3; | |
469 | n2s(p, len); | |
470 | ||
471 | if (left < SSL3_RT_HEADER_LENGTH + len) | |
472 | return 0; | |
473 | ||
474 | return 1; | |
475 | } | |
476 | ||
9dd90232 MC |
477 | static int rlayer_early_data_count_ok(OSSL_RECORD_LAYER *rl, size_t length, |
478 | size_t overhead, int send) | |
479 | { | |
480 | uint32_t max_early_data = rl->max_early_data; | |
481 | ||
482 | if (max_early_data == 0) { | |
483 | RLAYERfatal(rl, send ? SSL_AD_INTERNAL_ERROR : SSL_AD_UNEXPECTED_MESSAGE, | |
1704961c | 484 | SSL_R_TOO_MUCH_EARLY_DATA); |
9dd90232 MC |
485 | return 0; |
486 | } | |
487 | ||
488 | /* If we are dealing with ciphertext we need to allow for the overhead */ | |
489 | max_early_data += overhead; | |
490 | ||
491 | if (rl->early_data_count + length > max_early_data) { | |
492 | RLAYERfatal(rl, send ? SSL_AD_INTERNAL_ERROR : SSL_AD_UNEXPECTED_MESSAGE, | |
1704961c | 493 | SSL_R_TOO_MUCH_EARLY_DATA); |
9dd90232 MC |
494 | return 0; |
495 | } | |
496 | rl->early_data_count += length; | |
497 | ||
498 | return 1; | |
499 | } | |
500 | ||
4030869d MC |
501 | /* |
502 | * MAX_EMPTY_RECORDS defines the number of consecutive, empty records that | |
1704961c | 503 | * will be processed per call to tls_get_more_records. Without this limit an |
4030869d | 504 | * attacker could send empty records at a faster rate than we can process and |
1704961c | 505 | * cause tls_get_more_records to loop forever. |
4030869d MC |
506 | */ |
507 | #define MAX_EMPTY_RECORDS 32 | |
508 | ||
509 | #define SSL2_RT_HEADER_LENGTH 2 | |
510 | ||
511 | /*- | |
512 | * Call this to buffer new input records in rl->rrec. | |
513 | * It will return a OSSL_RECORD_RETURN_* value. | |
514 | * When it finishes successfully (OSSL_RECORD_RETURN_SUCCESS), |rl->num_recs| | |
515 | * records have been decoded. For each record 'i': | |
516 | * rrec[i].type - is the type of record | |
517 | * rrec[i].data, - data | |
518 | * rrec[i].length, - number of bytes | |
519 | * Multiple records will only be returned if the record types are all | |
520 | * SSL3_RT_APPLICATION_DATA. The number of records returned will always be <= | |
521 | * |max_pipelines| | |
522 | */ | |
eddb067e | 523 | int tls_get_more_records(OSSL_RECORD_LAYER *rl) |
4030869d MC |
524 | { |
525 | int enc_err, rret; | |
526 | int i; | |
527 | size_t more, n; | |
528 | SSL3_RECORD *rr, *thisrr; | |
529 | SSL3_BUFFER *rbuf; | |
4030869d MC |
530 | unsigned char *p; |
531 | unsigned char md[EVP_MAX_MD_SIZE]; | |
532 | unsigned int version; | |
533 | size_t mac_size = 0; | |
534 | int imac_size; | |
535 | size_t num_recs = 0, max_recs, j; | |
536 | PACKET pkt, sslv2pkt; | |
4030869d MC |
537 | SSL_MAC_BUF *macbufs = NULL; |
538 | int ret = OSSL_RECORD_RETURN_FATAL; | |
4030869d MC |
539 | |
540 | rr = rl->rrec; | |
541 | rbuf = &rl->rbuf; | |
cc110a0a | 542 | if (rbuf->buf == NULL) { |
9b7fb65e | 543 | if (!tls_setup_read_buffer(rl)) { |
cc110a0a MC |
544 | /* RLAYERfatal() already called */ |
545 | return OSSL_RECORD_RETURN_FATAL; | |
546 | } | |
547 | } | |
4030869d | 548 | |
8124ab56 MC |
549 | max_recs = rl->max_pipelines; |
550 | ||
4030869d MC |
551 | if (max_recs == 0) |
552 | max_recs = 1; | |
4030869d | 553 | |
4030869d MC |
554 | do { |
555 | thisrr = &rr[num_recs]; | |
556 | ||
557 | /* check if we have the header */ | |
558 | if ((rl->rstate != SSL_ST_READ_BODY) || | |
559 | (rl->packet_length < SSL3_RT_HEADER_LENGTH)) { | |
560 | size_t sslv2len; | |
561 | unsigned int type; | |
562 | ||
1853d20a MC |
563 | rret = rl->funcs->read_n(rl, SSL3_RT_HEADER_LENGTH, |
564 | SSL3_BUFFER_get_len(rbuf), 0, | |
565 | num_recs == 0 ? 1 : 0, &n); | |
566 | ||
567 | if (rret < OSSL_RECORD_RETURN_SUCCESS) | |
568 | return rret; /* error or non-blocking */ | |
569 | ||
4030869d MC |
570 | rl->rstate = SSL_ST_READ_BODY; |
571 | ||
572 | p = rl->packet; | |
573 | if (!PACKET_buf_init(&pkt, p, rl->packet_length)) { | |
574 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
575 | return OSSL_RECORD_RETURN_FATAL; | |
576 | } | |
577 | sslv2pkt = pkt; | |
578 | if (!PACKET_get_net_2_len(&sslv2pkt, &sslv2len) | |
579 | || !PACKET_get_1(&sslv2pkt, &type)) { | |
580 | RLAYERfatal(rl, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); | |
581 | return OSSL_RECORD_RETURN_FATAL; | |
582 | } | |
583 | /* | |
584 | * The first record received by the server may be a V2ClientHello. | |
585 | */ | |
586 | if (rl->role == OSSL_RECORD_ROLE_SERVER | |
587 | && rl->is_first_record | |
588 | && (sslv2len & 0x8000) != 0 | |
589 | && (type == SSL2_MT_CLIENT_HELLO)) { | |
590 | /* | |
591 | * SSLv2 style record | |
592 | * | |
593 | * |num_recs| here will actually always be 0 because | |
594 | * |num_recs > 0| only ever occurs when we are processing | |
595 | * multiple app data records - which we know isn't the case here | |
596 | * because it is an SSLv2ClientHello. We keep it using | |
597 | * |num_recs| for the sake of consistency | |
598 | */ | |
599 | thisrr->type = SSL3_RT_HANDSHAKE; | |
600 | thisrr->rec_version = SSL2_VERSION; | |
601 | ||
602 | thisrr->length = sslv2len & 0x7fff; | |
603 | ||
604 | if (thisrr->length > SSL3_BUFFER_get_len(rbuf) | |
1704961c | 605 | - SSL2_RT_HEADER_LENGTH) { |
4030869d MC |
606 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, |
607 | SSL_R_PACKET_LENGTH_TOO_LONG); | |
608 | return OSSL_RECORD_RETURN_FATAL; | |
609 | } | |
4030869d MC |
610 | } else { |
611 | /* SSLv3+ style record */ | |
612 | ||
613 | /* Pull apart the header into the SSL3_RECORD */ | |
614 | if (!PACKET_get_1(&pkt, &type) | |
615 | || !PACKET_get_net_2(&pkt, &version) | |
616 | || !PACKET_get_net_2_len(&pkt, &thisrr->length)) { | |
b85ebc4b MC |
617 | if (rl->msg_callback != NULL) |
618 | rl->msg_callback(0, 0, SSL3_RT_HEADER, p, 5, rl->cbarg); | |
4030869d MC |
619 | RLAYERfatal(rl, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); |
620 | return OSSL_RECORD_RETURN_FATAL; | |
621 | } | |
622 | thisrr->type = type; | |
623 | thisrr->rec_version = version; | |
624 | ||
014baa8a MC |
625 | /* |
626 | * When we call validate_record_header() only records actually | |
627 | * received in SSLv2 format should have the record version set | |
628 | * to SSL2_VERSION. This way validate_record_header() can know | |
629 | * what format the record was in based on the version. | |
630 | */ | |
631 | if (thisrr->rec_version == SSL2_VERSION) { | |
632 | RLAYERfatal(rl, SSL_AD_PROTOCOL_VERSION, | |
633 | SSL_R_WRONG_VERSION_NUMBER); | |
634 | return OSSL_RECORD_RETURN_FATAL; | |
635 | } | |
636 | ||
b85ebc4b MC |
637 | if (rl->msg_callback != NULL) |
638 | rl->msg_callback(0, version, SSL3_RT_HEADER, p, 5, rl->cbarg); | |
4030869d | 639 | |
4030869d MC |
640 | if (thisrr->length > |
641 | SSL3_BUFFER_get_len(rbuf) - SSL3_RT_HEADER_LENGTH) { | |
642 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, | |
643 | SSL_R_PACKET_LENGTH_TOO_LONG); | |
644 | return OSSL_RECORD_RETURN_FATAL; | |
645 | } | |
646 | } | |
647 | ||
1853d20a MC |
648 | if (!rl->funcs->validate_record_header(rl, thisrr)) { |
649 | /* RLAYERfatal already called */ | |
4030869d MC |
650 | return OSSL_RECORD_RETURN_FATAL; |
651 | } | |
4030869d | 652 | |
1853d20a | 653 | /* now rl->rstate == SSL_ST_READ_BODY */ |
4030869d MC |
654 | } |
655 | ||
656 | /* | |
657 | * rl->rstate == SSL_ST_READ_BODY, get and decode the data. Calculate | |
658 | * how much more data we need to read for the rest of the record | |
659 | */ | |
660 | if (thisrr->rec_version == SSL2_VERSION) { | |
661 | more = thisrr->length + SSL2_RT_HEADER_LENGTH | |
1704961c | 662 | - SSL3_RT_HEADER_LENGTH; |
4030869d MC |
663 | } else { |
664 | more = thisrr->length; | |
665 | } | |
666 | ||
667 | if (more > 0) { | |
668 | /* now rl->packet_length == SSL3_RT_HEADER_LENGTH */ | |
669 | ||
1853d20a | 670 | rret = rl->funcs->read_n(rl, more, more, 1, 0, &n); |
4030869d MC |
671 | if (rret < OSSL_RECORD_RETURN_SUCCESS) |
672 | return rret; /* error or non-blocking io */ | |
673 | } | |
674 | ||
675 | /* set state for later operations */ | |
676 | rl->rstate = SSL_ST_READ_HEADER; | |
677 | ||
678 | /* | |
679 | * At this point, rl->packet_length == SSL3_RT_HEADER_LENGTH | |
680 | * + thisrr->length, or rl->packet_length == SSL2_RT_HEADER_LENGTH | |
681 | * + thisrr->length and we have that many bytes in rl->packet | |
682 | */ | |
683 | if (thisrr->rec_version == SSL2_VERSION) | |
684 | thisrr->input = &(rl->packet[SSL2_RT_HEADER_LENGTH]); | |
685 | else | |
686 | thisrr->input = &(rl->packet[SSL3_RT_HEADER_LENGTH]); | |
687 | ||
688 | /* | |
689 | * ok, we can now read from 'rl->packet' data into 'thisrr'. | |
690 | * thisrr->input points at thisrr->length bytes, which need to be copied | |
691 | * into thisrr->data by either the decryption or by the decompression. | |
692 | * When the data is 'copied' into the thisrr->data buffer, | |
693 | * thisrr->input will be updated to point at the new buffer | |
694 | */ | |
695 | ||
696 | /* | |
697 | * We now have - encrypted [ MAC [ compressed [ plain ] ] ] | |
698 | * thisrr->length bytes of encrypted compressed stuff. | |
699 | */ | |
700 | ||
701 | /* decrypt in place in 'thisrr->input' */ | |
702 | thisrr->data = thisrr->input; | |
703 | thisrr->orig_len = thisrr->length; | |
704 | ||
4030869d MC |
705 | num_recs++; |
706 | ||
707 | /* we have pulled in a full packet so zero things */ | |
81c9ebd9 | 708 | rl->packet_length = 0; |
4030869d MC |
709 | rl->is_first_record = 0; |
710 | } while (num_recs < max_recs | |
711 | && thisrr->type == SSL3_RT_APPLICATION_DATA | |
88d61680 | 712 | && RLAYER_USE_EXPLICIT_IV(rl) |
6366bdd9 MC |
713 | && rl->enc_ctx != NULL |
714 | && (EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(rl->enc_ctx)) | |
4030869d MC |
715 | & EVP_CIPH_FLAG_PIPELINE) != 0 |
716 | && tls_record_app_data_waiting(rl)); | |
717 | ||
718 | if (num_recs == 1 | |
719 | && thisrr->type == SSL3_RT_CHANGE_CIPHER_SPEC | |
9cd9e097 MC |
720 | /* The following can happen in tlsany_meth after HRR */ |
721 | && rl->version == TLS1_3_VERSION | |
1853d20a | 722 | && rl->is_first_handshake) { |
4030869d MC |
723 | /* |
724 | * CCS messages must be exactly 1 byte long, containing the value 0x01 | |
725 | */ | |
726 | if (thisrr->length != 1 || thisrr->data[0] != 0x01) { | |
727 | RLAYERfatal(rl, SSL_AD_ILLEGAL_PARAMETER, | |
728 | SSL_R_INVALID_CCS_MESSAGE); | |
729 | return OSSL_RECORD_RETURN_FATAL; | |
730 | } | |
731 | /* | |
732 | * CCS messages are ignored in TLSv1.3. We treat it like an empty | |
733 | * handshake record | |
734 | */ | |
735 | thisrr->type = SSL3_RT_HANDSHAKE; | |
aedbb71b | 736 | if (++(rl->empty_record_count) > MAX_EMPTY_RECORDS) { |
4030869d MC |
737 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, |
738 | SSL_R_UNEXPECTED_CCS_MESSAGE); | |
739 | return OSSL_RECORD_RETURN_FATAL; | |
740 | } | |
4030869d MC |
741 | rl->num_recs = 0; |
742 | rl->curr_rec = 0; | |
743 | rl->num_released = 0; | |
744 | ||
745 | return OSSL_RECORD_RETURN_SUCCESS; | |
746 | } | |
747 | ||
6366bdd9 MC |
748 | if (rl->md_ctx != NULL) { |
749 | const EVP_MD *tmpmd = EVP_MD_CTX_get0_md(rl->md_ctx); | |
4030869d MC |
750 | |
751 | if (tmpmd != NULL) { | |
752 | imac_size = EVP_MD_get_size(tmpmd); | |
753 | if (!ossl_assert(imac_size >= 0 && imac_size <= EVP_MAX_MD_SIZE)) { | |
1704961c MC |
754 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
755 | return OSSL_RECORD_RETURN_FATAL; | |
4030869d MC |
756 | } |
757 | mac_size = (size_t)imac_size; | |
758 | } | |
759 | } | |
760 | ||
761 | /* | |
762 | * If in encrypt-then-mac mode calculate mac from encrypted record. All | |
763 | * the details below are public so no timing details can leak. | |
764 | */ | |
bed07b18 | 765 | if (rl->use_etm && rl->md_ctx != NULL) { |
4030869d MC |
766 | unsigned char *mac; |
767 | ||
768 | for (j = 0; j < num_recs; j++) { | |
769 | thisrr = &rr[j]; | |
770 | ||
771 | if (thisrr->length < mac_size) { | |
772 | RLAYERfatal(rl, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); | |
773 | return OSSL_RECORD_RETURN_FATAL; | |
774 | } | |
775 | thisrr->length -= mac_size; | |
776 | mac = thisrr->data + thisrr->length; | |
8124ab56 | 777 | i = rl->funcs->mac(rl, thisrr, md, 0 /* not send */); |
4030869d MC |
778 | if (i == 0 || CRYPTO_memcmp(md, mac, mac_size) != 0) { |
779 | RLAYERfatal(rl, SSL_AD_BAD_RECORD_MAC, | |
780 | SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); | |
781 | return OSSL_RECORD_RETURN_FATAL; | |
782 | } | |
783 | } | |
784 | /* | |
785 | * We've handled the mac now - there is no MAC inside the encrypted | |
786 | * record | |
787 | */ | |
788 | mac_size = 0; | |
789 | } | |
790 | ||
791 | if (mac_size > 0) { | |
792 | macbufs = OPENSSL_zalloc(sizeof(*macbufs) * num_recs); | |
793 | if (macbufs == NULL) { | |
e077455e | 794 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB); |
4030869d MC |
795 | return OSSL_RECORD_RETURN_FATAL; |
796 | } | |
797 | } | |
798 | ||
8124ab56 | 799 | enc_err = rl->funcs->cipher(rl, rr, num_recs, 0, macbufs, mac_size); |
4030869d MC |
800 | |
801 | /*- | |
802 | * enc_err is: | |
803 | * 0: if the record is publicly invalid, or an internal error, or AEAD | |
804 | * decryption failed, or ETM decryption failed. | |
805 | * 1: Success or MTE decryption failed (MAC will be randomised) | |
806 | */ | |
807 | if (enc_err == 0) { | |
d3192c26 | 808 | if (rl->alert != SSL_AD_NO_ALERT) { |
651216dd | 809 | /* RLAYERfatal() already got called */ |
4030869d MC |
810 | goto end; |
811 | } | |
b85ebc4b MC |
812 | if (num_recs == 1 |
813 | && rl->skip_early_data != NULL | |
814 | && rl->skip_early_data(rl->cbarg)) { | |
4030869d MC |
815 | /* |
816 | * Valid early_data that we cannot decrypt will fail here. We treat | |
817 | * it like an empty record. | |
818 | */ | |
819 | ||
820 | thisrr = &rr[0]; | |
821 | ||
9dd90232 MC |
822 | if (!rlayer_early_data_count_ok(rl, thisrr->length, |
823 | EARLY_DATA_CIPHERTEXT_OVERHEAD, 0)) { | |
824 | /* RLAYERfatal() already called */ | |
4030869d MC |
825 | goto end; |
826 | } | |
827 | ||
828 | thisrr->length = 0; | |
4030869d MC |
829 | rl->num_recs = 0; |
830 | rl->curr_rec = 0; | |
831 | rl->num_released = 0; | |
0755722c MC |
832 | /* Reset the read sequence */ |
833 | memset(rl->sequence, 0, sizeof(rl->sequence)); | |
4030869d MC |
834 | ret = 1; |
835 | goto end; | |
836 | } | |
837 | RLAYERfatal(rl, SSL_AD_BAD_RECORD_MAC, | |
838 | SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); | |
839 | goto end; | |
840 | } | |
841 | OSSL_TRACE_BEGIN(TLS) { | |
842 | BIO_printf(trc_out, "dec %lu\n", (unsigned long)rr[0].length); | |
843 | BIO_dump_indent(trc_out, rr[0].data, rr[0].length, 4); | |
844 | } OSSL_TRACE_END(TLS); | |
845 | ||
846 | /* r->length is now the compressed data plus mac */ | |
6366bdd9 | 847 | if (rl->enc_ctx != NULL |
ffbd6e67 | 848 | && !rl->use_etm |
6366bdd9 | 849 | && EVP_MD_CTX_get0_md(rl->md_ctx) != NULL) { |
4030869d MC |
850 | for (j = 0; j < num_recs; j++) { |
851 | SSL_MAC_BUF *thismb = &macbufs[j]; | |
1704961c | 852 | |
4030869d MC |
853 | thisrr = &rr[j]; |
854 | ||
8124ab56 | 855 | i = rl->funcs->mac(rl, thisrr, md, 0 /* not send */); |
4030869d MC |
856 | if (i == 0 || thismb == NULL || thismb->mac == NULL |
857 | || CRYPTO_memcmp(md, thismb->mac, (size_t)mac_size) != 0) | |
858 | enc_err = 0; | |
859 | if (thisrr->length > SSL3_RT_MAX_COMPRESSED_LENGTH + mac_size) | |
860 | enc_err = 0; | |
861 | } | |
862 | } | |
863 | ||
864 | if (enc_err == 0) { | |
d3192c26 | 865 | if (rl->alert != SSL_AD_NO_ALERT) { |
651216dd | 866 | /* We already called RLAYERfatal() */ |
4030869d MC |
867 | goto end; |
868 | } | |
869 | /* | |
870 | * A separate 'decryption_failed' alert was introduced with TLS 1.0, | |
871 | * SSL 3.0 only has 'bad_record_mac'. But unless a decryption | |
872 | * failure is directly visible from the ciphertext anyway, we should | |
873 | * not reveal which kind of error occurred -- this might become | |
874 | * visible to an attacker (e.g. via a logfile) | |
875 | */ | |
876 | RLAYERfatal(rl, SSL_AD_BAD_RECORD_MAC, | |
877 | SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); | |
878 | goto end; | |
879 | } | |
880 | ||
4030869d MC |
881 | for (j = 0; j < num_recs; j++) { |
882 | thisrr = &rr[j]; | |
883 | ||
8124ab56 | 884 | if (!rl->funcs->post_process_record(rl, thisrr)) { |
1853d20a | 885 | /* RLAYERfatal already called */ |
4030869d MC |
886 | goto end; |
887 | } | |
888 | ||
889 | /* | |
890 | * Check if the received packet overflows the current | |
891 | * Max Fragment Length setting. | |
ffbd6e67 | 892 | * Note: rl->max_frag_len > 0 and KTLS are mutually exclusive. |
4030869d | 893 | */ |
435d88d7 | 894 | if (thisrr->length > rl->max_frag_len) { |
4030869d MC |
895 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, SSL_R_DATA_LENGTH_TOO_LONG); |
896 | goto end; | |
897 | } | |
898 | ||
899 | thisrr->off = 0; | |
900 | /*- | |
901 | * So at this point the following is true | |
902 | * thisrr->type is the type of record | |
903 | * thisrr->length == number of bytes in record | |
904 | * thisrr->off == offset to first valid byte | |
905 | * thisrr->data == where to take bytes from, increment after use :-). | |
906 | */ | |
907 | ||
908 | /* just read a 0 length packet */ | |
909 | if (thisrr->length == 0) { | |
aedbb71b | 910 | if (++(rl->empty_record_count) > MAX_EMPTY_RECORDS) { |
1704961c MC |
911 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, |
912 | SSL_R_RECORD_TOO_SMALL); | |
4030869d MC |
913 | goto end; |
914 | } | |
915 | } else { | |
aedbb71b | 916 | rl->empty_record_count = 0; |
4030869d MC |
917 | } |
918 | } | |
919 | ||
9dd90232 | 920 | if (rl->level == OSSL_RECORD_PROTECTION_LEVEL_EARLY) { |
4030869d MC |
921 | thisrr = &rr[0]; |
922 | if (thisrr->type == SSL3_RT_APPLICATION_DATA | |
9dd90232 MC |
923 | && !rlayer_early_data_count_ok(rl, thisrr->length, 0, 0)) { |
924 | /* RLAYERfatal already called */ | |
4030869d MC |
925 | goto end; |
926 | } | |
927 | } | |
928 | ||
929 | rl->num_recs = num_recs; | |
930 | rl->curr_rec = 0; | |
931 | rl->num_released = 0; | |
932 | ret = OSSL_RECORD_RETURN_SUCCESS; | |
933 | end: | |
934 | if (macbufs != NULL) { | |
935 | for (j = 0; j < num_recs; j++) { | |
936 | if (macbufs[j].alloced) | |
937 | OPENSSL_free(macbufs[j].mac); | |
938 | } | |
939 | OPENSSL_free(macbufs); | |
940 | } | |
941 | return ret; | |
942 | } | |
943 | ||
1853d20a MC |
944 | /* Shared by ssl3_meth and tls1_meth */ |
945 | int tls_default_validate_record_header(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) | |
946 | { | |
947 | size_t len = SSL3_RT_MAX_ENCRYPTED_LENGTH; | |
948 | ||
949 | if (rec->rec_version != rl->version) { | |
950 | RLAYERfatal(rl, SSL_AD_PROTOCOL_VERSION, SSL_R_WRONG_VERSION_NUMBER); | |
951 | return 0; | |
952 | } | |
953 | ||
954 | #ifndef OPENSSL_NO_COMP | |
955 | /* | |
1704961c MC |
956 | * If OPENSSL_NO_COMP is defined then SSL3_RT_MAX_ENCRYPTED_LENGTH |
957 | * does not include the compression overhead anyway. | |
958 | */ | |
9251c3c4 | 959 | if (rl->compctx == NULL) |
1853d20a MC |
960 | len -= SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
961 | #endif | |
962 | ||
963 | if (rec->length > len) { | |
964 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, | |
965 | SSL_R_ENCRYPTED_LENGTH_TOO_LONG); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | return 1; | |
970 | } | |
971 | ||
b9e37f8f | 972 | int tls_do_compress(OSSL_RECORD_LAYER *rl, SSL3_RECORD *wr) |
9251c3c4 MC |
973 | { |
974 | #ifndef OPENSSL_NO_COMP | |
975 | int i; | |
976 | ||
977 | i = COMP_compress_block(rl->compctx, wr->data, | |
978 | (int)(wr->length + SSL3_RT_MAX_COMPRESSED_OVERHEAD), | |
979 | wr->input, (int)wr->length); | |
980 | if (i < 0) | |
981 | return 0; | |
982 | ||
983 | wr->length = i; | |
984 | wr->input = wr->data; | |
985 | return 1; | |
986 | #else | |
987 | return 0; | |
988 | #endif | |
989 | } | |
990 | ||
222cf410 | 991 | int tls_do_uncompress(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) |
1853d20a MC |
992 | { |
993 | #ifndef OPENSSL_NO_COMP | |
994 | int i; | |
995 | ||
996 | if (rec->comp == NULL) { | |
997 | rec->comp = (unsigned char *) | |
998 | OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); | |
999 | } | |
1000 | if (rec->comp == NULL) | |
1001 | return 0; | |
1002 | ||
9251c3c4 | 1003 | i = COMP_expand_block(rl->compctx, rec->comp, SSL3_RT_MAX_PLAIN_LENGTH, |
1704961c | 1004 | rec->data, (int)rec->length); |
1853d20a MC |
1005 | if (i < 0) |
1006 | return 0; | |
1007 | else | |
1008 | rec->length = i; | |
1009 | rec->data = rec->comp; | |
1010 | return 1; | |
1011 | #else | |
1012 | return 0; | |
1013 | #endif | |
1014 | } | |
1015 | ||
1016 | /* Shared by tlsany_meth, ssl3_meth and tls1_meth */ | |
8124ab56 | 1017 | int tls_default_post_process_record(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) |
1853d20a | 1018 | { |
9251c3c4 | 1019 | if (rl->compctx != NULL) { |
1853d20a MC |
1020 | if (rec->length > SSL3_RT_MAX_COMPRESSED_LENGTH) { |
1021 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, | |
1022 | SSL_R_COMPRESSED_LENGTH_TOO_LONG); | |
1023 | return 0; | |
1024 | } | |
1025 | if (!tls_do_uncompress(rl, rec)) { | |
1026 | RLAYERfatal(rl, SSL_AD_DECOMPRESSION_FAILURE, | |
1027 | SSL_R_BAD_DECOMPRESSION); | |
1028 | return 0; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | if (rec->length > SSL3_RT_MAX_PLAIN_LENGTH) { | |
1033 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, SSL_R_DATA_LENGTH_TOO_LONG); | |
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | return 1; | |
1038 | } | |
1039 | ||
1040 | /* Shared by tls13_meth and ktls_meth */ | |
8124ab56 | 1041 | int tls13_common_post_process_record(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) |
1853d20a | 1042 | { |
1853d20a MC |
1043 | if (rec->type != SSL3_RT_APPLICATION_DATA |
1044 | && rec->type != SSL3_RT_ALERT | |
1045 | && rec->type != SSL3_RT_HANDSHAKE) { | |
1046 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_BAD_RECORD_TYPE); | |
1047 | return 0; | |
1048 | } | |
1049 | ||
b85ebc4b MC |
1050 | if (rl->msg_callback != NULL) |
1051 | rl->msg_callback(0, rl->version, SSL3_RT_INNER_CONTENT_TYPE, &rec->type, | |
1052 | 1, rl->cbarg); | |
1853d20a MC |
1053 | |
1054 | /* | |
1055 | * TLSv1.3 alert and handshake records are required to be non-zero in | |
1056 | * length. | |
1057 | */ | |
1704961c | 1058 | if ((rec->type == SSL3_RT_HANDSHAKE || rec->type == SSL3_RT_ALERT) |
1853d20a MC |
1059 | && rec->length == 0) { |
1060 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_BAD_LENGTH); | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | return 1; | |
1065 | } | |
1066 | ||
1704961c | 1067 | int tls_read_record(OSSL_RECORD_LAYER *rl, void **rechandle, int *rversion, |
1853d20a | 1068 | int *type, unsigned char **data, size_t *datalen, |
8124ab56 | 1069 | uint16_t *epoch, unsigned char *seq_num) |
4030869d MC |
1070 | { |
1071 | SSL3_RECORD *rec; | |
1072 | ||
1073 | /* | |
1074 | * tls_get_more_records() can return success without actually reading | |
1075 | * anything useful (i.e. if empty records are read). We loop here until | |
1076 | * we have something useful. tls_get_more_records() will eventually fail if | |
1077 | * too many sequential empty records are read. | |
1078 | */ | |
1079 | while (rl->curr_rec >= rl->num_recs) { | |
1080 | int ret; | |
1081 | ||
1082 | if (rl->num_released != rl->num_recs) { | |
1083 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_RECORDS_NOT_RELEASED); | |
1084 | return OSSL_RECORD_RETURN_FATAL; | |
1085 | } | |
1086 | ||
eddb067e | 1087 | ret = rl->funcs->get_more_records(rl); |
4030869d MC |
1088 | |
1089 | if (ret != OSSL_RECORD_RETURN_SUCCESS) | |
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * We have now got rl->num_recs records buffered in rl->rrec. rl->curr_rec | |
1095 | * points to the next one to read. | |
1096 | */ | |
1097 | rec = &rl->rrec[rl->curr_rec++]; | |
1098 | ||
1099 | *rechandle = rec; | |
1100 | *rversion = rec->rec_version; | |
1101 | *type = rec->type; | |
eddb067e | 1102 | *data = rec->data + rec->off; |
4030869d | 1103 | *datalen = rec->length; |
eddb067e | 1104 | if (rl->isdtls) { |
279754d4 | 1105 | *epoch = rec->epoch; |
eddb067e MC |
1106 | memcpy(seq_num, rec->seq_num, sizeof(rec->seq_num)); |
1107 | } | |
4030869d MC |
1108 | |
1109 | return OSSL_RECORD_RETURN_SUCCESS; | |
1110 | } | |
1111 | ||
1853d20a | 1112 | int tls_release_record(OSSL_RECORD_LAYER *rl, void *rechandle) |
4030869d MC |
1113 | { |
1114 | if (!ossl_assert(rl->num_released < rl->curr_rec) | |
1115 | || !ossl_assert(rechandle == &rl->rrec[rl->num_released])) { | |
1116 | /* Should not happen */ | |
1117 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_INVALID_RECORD); | |
1118 | return OSSL_RECORD_RETURN_FATAL; | |
1119 | } | |
1120 | ||
1121 | rl->num_released++; | |
1122 | ||
3de76959 MC |
1123 | if (rl->curr_rec == rl->num_released |
1124 | && (rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0 | |
1125 | && SSL3_BUFFER_get_left(&rl->rbuf) == 0) | |
9b7fb65e | 1126 | tls_release_read_buffer(rl); |
3de76959 | 1127 | |
4030869d MC |
1128 | return OSSL_RECORD_RETURN_SUCCESS; |
1129 | } | |
1130 | ||
4566dae7 MC |
1131 | int tls_set_options(OSSL_RECORD_LAYER *rl, const OSSL_PARAM *options) |
1132 | { | |
1133 | const OSSL_PARAM *p; | |
1134 | ||
1135 | p = OSSL_PARAM_locate_const(options, OSSL_LIBSSL_RECORD_LAYER_PARAM_OPTIONS); | |
1136 | if (p != NULL && !OSSL_PARAM_get_uint64(p, &rl->options)) { | |
1137 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | p = OSSL_PARAM_locate_const(options, OSSL_LIBSSL_RECORD_LAYER_PARAM_MODE); | |
1142 | if (p != NULL && !OSSL_PARAM_get_uint32(p, &rl->mode)) { | |
1143 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1144 | return 0; | |
1145 | } | |
1146 | ||
eb7d6c2a MC |
1147 | if (rl->direction == OSSL_RECORD_DIRECTION_READ) { |
1148 | p = OSSL_PARAM_locate_const(options, | |
1149 | OSSL_LIBSSL_RECORD_LAYER_READ_BUFFER_LEN); | |
1150 | if (p != NULL && !OSSL_PARAM_get_size_t(p, &rl->rbuf.default_len)) { | |
1151 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1152 | return 0; | |
1153 | } | |
1154 | } else { | |
1155 | p = OSSL_PARAM_locate_const(options, | |
1156 | OSSL_LIBSSL_RECORD_LAYER_PARAM_BLOCK_PADDING); | |
1157 | if (p != NULL && !OSSL_PARAM_get_size_t(p, &rl->block_padding)) { | |
1158 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1159 | return 0; | |
1160 | } | |
4566dae7 MC |
1161 | } |
1162 | ||
1163 | if (rl->level == OSSL_RECORD_PROTECTION_LEVEL_APPLICATION) { | |
1164 | /* | |
1165 | * We ignore any read_ahead setting prior to the application protection | |
1166 | * level. Otherwise we may read ahead data in a lower protection level | |
1167 | * that is destined for a higher protection level. To simplify the logic | |
1168 | * we don't support that at this stage. | |
1169 | */ | |
1170 | p = OSSL_PARAM_locate_const(options, | |
1171 | OSSL_LIBSSL_RECORD_LAYER_PARAM_READ_AHEAD); | |
1172 | if (p != NULL && !OSSL_PARAM_get_int(p, &rl->read_ahead)) { | |
1173 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1174 | return 0; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | return 1; | |
1179 | } | |
1180 | ||
1853d20a | 1181 | int |
cc110a0a MC |
1182 | tls_int_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers, |
1183 | int role, int direction, int level, unsigned char *key, | |
1184 | size_t keylen, unsigned char *iv, size_t ivlen, | |
1185 | unsigned char *mackey, size_t mackeylen, | |
1186 | const EVP_CIPHER *ciph, size_t taglen, | |
cc110a0a | 1187 | int mactype, |
1e76110b | 1188 | const EVP_MD *md, COMP_METHOD *comp, BIO *prev, |
359affde MC |
1189 | BIO *transport, BIO *next, BIO_ADDR *local, |
1190 | BIO_ADDR *peer, const OSSL_PARAM *settings, | |
9dd90232 MC |
1191 | const OSSL_PARAM *options, |
1192 | const OSSL_DISPATCH *fns, void *cbarg, | |
8124ab56 | 1193 | OSSL_RECORD_LAYER **retrl) |
34a4068c MC |
1194 | { |
1195 | OSSL_RECORD_LAYER *rl = OPENSSL_zalloc(sizeof(*rl)); | |
e2d5742b MC |
1196 | const OSSL_PARAM *p; |
1197 | ||
7c293999 MC |
1198 | *retrl = NULL; |
1199 | ||
e077455e | 1200 | if (rl == NULL) |
7c293999 | 1201 | return OSSL_RECORD_RETURN_FATAL; |
e2d5742b | 1202 | |
435d88d7 MC |
1203 | /* |
1204 | * Default the value for max_frag_len. This may be overridden by the | |
1205 | * settings | |
1206 | */ | |
1207 | rl->max_frag_len = SSL3_RT_MAX_PLAIN_LENGTH; | |
1208 | ||
7f2f0ac7 | 1209 | /* Loop through all the settings since they must all be understood */ |
a16f9d33 MC |
1210 | if (settings != NULL) { |
1211 | for (p = settings; p->key != NULL; p++) { | |
1212 | if (strcmp(p->key, OSSL_LIBSSL_RECORD_LAYER_PARAM_USE_ETM) == 0) { | |
1213 | if (!OSSL_PARAM_get_int(p, &rl->use_etm)) { | |
7b7ad9e5 | 1214 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1215 | goto err; |
1216 | } | |
1217 | } else if (strcmp(p->key, | |
1218 | OSSL_LIBSSL_RECORD_LAYER_PARAM_MAX_FRAG_LEN) == 0) { | |
1219 | if (!OSSL_PARAM_get_uint(p, &rl->max_frag_len)) { | |
7b7ad9e5 | 1220 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1221 | goto err; |
1222 | } | |
1223 | } else if (strcmp(p->key, | |
1224 | OSSL_LIBSSL_RECORD_LAYER_PARAM_MAX_EARLY_DATA) == 0) { | |
1225 | if (!OSSL_PARAM_get_uint32(p, &rl->max_early_data)) { | |
7b7ad9e5 | 1226 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1227 | goto err; |
1228 | } | |
1229 | } else if (strcmp(p->key, | |
1230 | OSSL_LIBSSL_RECORD_LAYER_PARAM_STREAM_MAC) == 0) { | |
1231 | if (!OSSL_PARAM_get_int(p, &rl->stream_mac)) { | |
7b7ad9e5 | 1232 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1233 | goto err; |
1234 | } | |
1704961c MC |
1235 | } else if (strcmp(p->key, |
1236 | OSSL_LIBSSL_RECORD_LAYER_PARAM_TLSTREE) == 0) { | |
a16f9d33 | 1237 | if (!OSSL_PARAM_get_int(p, &rl->tlstree)) { |
7b7ad9e5 | 1238 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1239 | goto err; |
1240 | } | |
1241 | } else { | |
7b7ad9e5 | 1242 | ERR_raise(ERR_LIB_SSL, SSL_R_UNKNOWN_MANDATORY_PARAMETER); |
8124ab56 MC |
1243 | goto err; |
1244 | } | |
7f2f0ac7 MC |
1245 | } |
1246 | } | |
1247 | ||
aedbb71b MC |
1248 | rl->libctx = libctx; |
1249 | rl->propq = propq; | |
1250 | ||
e2d5742b MC |
1251 | rl->version = vers; |
1252 | rl->role = role; | |
1253 | rl->direction = direction; | |
9dd90232 | 1254 | rl->level = level; |
b05fbac1 MC |
1255 | rl->taglen = taglen; |
1256 | rl->md = md; | |
4030869d | 1257 | |
d3192c26 MC |
1258 | rl->alert = SSL_AD_NO_ALERT; |
1259 | ||
1853d20a | 1260 | if (level == OSSL_RECORD_PROTECTION_LEVEL_NONE) |
4030869d MC |
1261 | rl->is_first_record = 1; |
1262 | ||
e2d5742b MC |
1263 | if (!tls_set1_bio(rl, transport)) |
1264 | goto err; | |
1265 | ||
359affde MC |
1266 | if (prev != NULL && !BIO_up_ref(prev)) |
1267 | goto err; | |
1268 | rl->prev = prev; | |
1269 | ||
1270 | if (next != NULL && !BIO_up_ref(next)) | |
1271 | goto err; | |
1272 | rl->next = next; | |
1273 | ||
9dd90232 | 1274 | rl->cbarg = cbarg; |
a16f9d33 MC |
1275 | if (fns != NULL) { |
1276 | for (; fns->function_id != 0; fns++) { | |
1277 | switch (fns->function_id) { | |
1278 | case OSSL_FUNC_RLAYER_SKIP_EARLY_DATA: | |
1279 | rl->skip_early_data = OSSL_FUNC_rlayer_skip_early_data(fns); | |
1280 | break; | |
1281 | case OSSL_FUNC_RLAYER_MSG_CALLBACK: | |
1282 | rl->msg_callback = OSSL_FUNC_rlayer_msg_callback(fns); | |
1283 | break; | |
1284 | case OSSL_FUNC_RLAYER_SECURITY: | |
1285 | rl->security = OSSL_FUNC_rlayer_security(fns); | |
1286 | break; | |
5f95eb77 MC |
1287 | case OSSL_FUNC_RLAYER_PADDING: |
1288 | rl->padding = OSSL_FUNC_rlayer_padding(fns); | |
a16f9d33 MC |
1289 | default: |
1290 | /* Just ignore anything we don't understand */ | |
1291 | break; | |
1292 | } | |
9dd90232 MC |
1293 | } |
1294 | } | |
1295 | ||
4566dae7 | 1296 | if (!tls_set_options(rl, options)) { |
7b7ad9e5 | 1297 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
4566dae7 MC |
1298 | goto err; |
1299 | } | |
1300 | ||
b9e4e783 MC |
1301 | if ((rl->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) == 0 |
1302 | && rl->version <= TLS1_VERSION | |
1303 | && !EVP_CIPHER_is_a(ciph, "NULL") | |
1304 | && !EVP_CIPHER_is_a(ciph, "RC4")) { | |
1305 | /* | |
1306 | * Enable vulnerability countermeasure for CBC ciphers with known-IV | |
1307 | * problem (http://www.openssl.org/~bodo/tls-cbc.txt) | |
1308 | */ | |
1309 | rl->need_empty_fragments = 1; | |
1310 | } | |
1311 | ||
7c293999 MC |
1312 | *retrl = rl; |
1313 | return OSSL_RECORD_RETURN_SUCCESS; | |
cc110a0a | 1314 | err: |
359affde | 1315 | tls_int_free(rl); |
7c293999 | 1316 | return OSSL_RECORD_RETURN_FATAL; |
cc110a0a MC |
1317 | } |
1318 | ||
7c293999 | 1319 | static int |
cc110a0a | 1320 | tls_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers, |
279754d4 | 1321 | int role, int direction, int level, uint16_t epoch, |
222cf410 MC |
1322 | unsigned char *key, size_t keylen, unsigned char *iv, |
1323 | size_t ivlen, unsigned char *mackey, size_t mackeylen, | |
cc110a0a | 1324 | const EVP_CIPHER *ciph, size_t taglen, |
cc110a0a | 1325 | int mactype, |
1e76110b | 1326 | const EVP_MD *md, COMP_METHOD *comp, BIO *prev, |
359affde | 1327 | BIO *transport, BIO *next, BIO_ADDR *local, BIO_ADDR *peer, |
cc110a0a | 1328 | const OSSL_PARAM *settings, const OSSL_PARAM *options, |
9dd90232 | 1329 | const OSSL_DISPATCH *fns, void *cbarg, |
8124ab56 | 1330 | OSSL_RECORD_LAYER **retrl) |
cc110a0a | 1331 | { |
7c293999 | 1332 | int ret; |
1704961c | 1333 | |
7c293999 MC |
1334 | ret = tls_int_new_record_layer(libctx, propq, vers, role, direction, level, |
1335 | key, keylen, iv, ivlen, mackey, mackeylen, | |
359affde MC |
1336 | ciph, taglen, mactype, md, comp, prev, |
1337 | transport, next, local, peer, settings, | |
8124ab56 | 1338 | options, fns, cbarg, retrl); |
cc110a0a | 1339 | |
7c293999 MC |
1340 | if (ret != OSSL_RECORD_RETURN_SUCCESS) |
1341 | return ret; | |
cc110a0a | 1342 | |
aedbb71b MC |
1343 | switch (vers) { |
1344 | case TLS_ANY_VERSION: | |
7c293999 | 1345 | (*retrl)->funcs = &tls_any_funcs; |
aedbb71b MC |
1346 | break; |
1347 | case TLS1_3_VERSION: | |
7c293999 | 1348 | (*retrl)->funcs = &tls_1_3_funcs; |
aedbb71b MC |
1349 | break; |
1350 | case TLS1_2_VERSION: | |
aedbb71b | 1351 | case TLS1_1_VERSION: |
aedbb71b | 1352 | case TLS1_VERSION: |
7c293999 | 1353 | (*retrl)->funcs = &tls_1_funcs; |
aedbb71b MC |
1354 | break; |
1355 | case SSL3_VERSION: | |
7c293999 | 1356 | (*retrl)->funcs = &ssl_3_0_funcs; |
aedbb71b MC |
1357 | break; |
1358 | default: | |
1359 | /* Should not happen */ | |
7c293999 MC |
1360 | ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR); |
1361 | ret = OSSL_RECORD_RETURN_FATAL; | |
aedbb71b MC |
1362 | goto err; |
1363 | } | |
1364 | ||
7c293999 | 1365 | ret = (*retrl)->funcs->set_crypto_state(*retrl, level, key, keylen, iv, |
1704961c MC |
1366 | ivlen, mackey, mackeylen, ciph, |
1367 | taglen, mactype, md, comp); | |
aedbb71b | 1368 | |
e2d5742b | 1369 | err: |
7c293999 MC |
1370 | if (ret != OSSL_RECORD_RETURN_SUCCESS) { |
1371 | OPENSSL_free(*retrl); | |
1372 | *retrl = NULL; | |
1373 | } | |
1374 | return ret; | |
e2d5742b MC |
1375 | } |
1376 | ||
359affde | 1377 | static void tls_int_free(OSSL_RECORD_LAYER *rl) |
34a4068c | 1378 | { |
359affde | 1379 | BIO_free(rl->prev); |
e2d5742b | 1380 | BIO_free(rl->bio); |
359affde MC |
1381 | BIO_free(rl->next); |
1382 | SSL3_BUFFER_release(&rl->rbuf); | |
1383 | ||
151f313e MC |
1384 | tls_release_write_buffer(rl); |
1385 | ||
6366bdd9 MC |
1386 | EVP_CIPHER_CTX_free(rl->enc_ctx); |
1387 | EVP_MD_CTX_free(rl->md_ctx); | |
976b263d | 1388 | #ifndef OPENSSL_NO_COMP |
9251c3c4 | 1389 | COMP_CTX_free(rl->compctx); |
976b263d | 1390 | #endif |
359affde | 1391 | |
c77d4556 MC |
1392 | if (rl->version == SSL3_VERSION) |
1393 | OPENSSL_cleanse(rl->mac_secret, sizeof(rl->mac_secret)); | |
1394 | ||
6b5c7ef7 JC |
1395 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
1396 | ||
34a4068c MC |
1397 | OPENSSL_free(rl); |
1398 | } | |
1399 | ||
359affde MC |
1400 | int tls_free(OSSL_RECORD_LAYER *rl) |
1401 | { | |
1402 | SSL3_BUFFER *rbuf; | |
1403 | size_t left, written; | |
1404 | int ret = 1; | |
1405 | ||
50bed93a MC |
1406 | if (rl == NULL) |
1407 | return 1; | |
1408 | ||
359affde MC |
1409 | rbuf = &rl->rbuf; |
1410 | ||
1411 | left = SSL3_BUFFER_get_left(rbuf); | |
1412 | if (left > 0) { | |
1413 | /* | |
1414 | * This record layer is closing but we still have data left in our | |
1415 | * buffer. It must be destined for the next epoch - so push it there. | |
1416 | */ | |
1417 | ret = BIO_write_ex(rl->next, rbuf->buf + rbuf->offset, left, &written); | |
1418 | } | |
1419 | tls_int_free(rl); | |
1420 | ||
1421 | return ret; | |
1422 | } | |
1423 | ||
1853d20a | 1424 | int tls_reset(OSSL_RECORD_LAYER *rl) |
34a4068c MC |
1425 | { |
1426 | memset(rl, 0, sizeof(*rl)); | |
1427 | return 1; | |
1428 | } | |
1429 | ||
1853d20a | 1430 | int tls_unprocessed_read_pending(OSSL_RECORD_LAYER *rl) |
34a4068c | 1431 | { |
0755722c | 1432 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; |
34a4068c MC |
1433 | } |
1434 | ||
1853d20a | 1435 | int tls_processed_read_pending(OSSL_RECORD_LAYER *rl) |
34a4068c | 1436 | { |
4030869d | 1437 | return rl->curr_rec < rl->num_recs; |
34a4068c MC |
1438 | } |
1439 | ||
1853d20a | 1440 | size_t tls_app_data_pending(OSSL_RECORD_LAYER *rl) |
34a4068c | 1441 | { |
8bbf7ef6 MC |
1442 | size_t i; |
1443 | size_t num = 0; | |
1444 | ||
1704961c | 1445 | for (i = rl->curr_rec; i < rl->num_recs; i++) { |
8bbf7ef6 MC |
1446 | if (rl->rrec[i].type != SSL3_RT_APPLICATION_DATA) |
1447 | return num; | |
1448 | num += rl->rrec[i].length; | |
1449 | } | |
1450 | return num; | |
34a4068c MC |
1451 | } |
1452 | ||
bafe524b MC |
1453 | size_t tls_get_max_records_default(OSSL_RECORD_LAYER *rl, int type, size_t len, |
1454 | size_t maxfrag, size_t *preffrag) | |
34a4068c | 1455 | { |
c6186792 MC |
1456 | /* |
1457 | * If we have a pipeline capable cipher, and we have been configured to use | |
1458 | * it, then return the preferred number of pipelines. | |
1459 | */ | |
1460 | if (rl->max_pipelines > 0 | |
91fe8ff0 | 1461 | && rl->enc_ctx != NULL |
2c50d7fb | 1462 | && (EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(rl->enc_ctx)) |
c6186792 MC |
1463 | & EVP_CIPH_FLAG_PIPELINE) != 0 |
1464 | && RLAYER_USE_EXPLICIT_IV(rl)) { | |
1465 | size_t pipes; | |
1466 | ||
1467 | if (len == 0) | |
1468 | return 1; | |
1469 | pipes = ((len - 1) / *preffrag) + 1; | |
1470 | ||
1471 | return (pipes < rl->max_pipelines) ? pipes : rl->max_pipelines; | |
1472 | } | |
1473 | ||
02719d5c | 1474 | return 1; |
34a4068c MC |
1475 | } |
1476 | ||
bafe524b MC |
1477 | size_t tls_get_max_records(OSSL_RECORD_LAYER *rl, int type, size_t len, |
1478 | size_t maxfrag, size_t *preffrag) | |
23bf52a4 | 1479 | { |
bafe524b | 1480 | return rl->funcs->get_max_records(rl, type, len, maxfrag, preffrag); |
23bf52a4 MC |
1481 | } |
1482 | ||
91fe8ff0 MC |
1483 | int tls_allocate_write_buffers_default(OSSL_RECORD_LAYER *rl, |
1484 | OSSL_RECORD_TEMPLATE *templates, | |
1485 | size_t numtempl, | |
1486 | size_t *prefix) | |
1487 | { | |
1488 | if (!tls_setup_write_buffer(rl, numtempl, 0, 0)) { | |
1489 | /* RLAYERfatal() already called */ | |
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | return 1; | |
1494 | } | |
1495 | ||
1496 | int tls_initialise_write_packets_default(OSSL_RECORD_LAYER *rl, | |
1497 | OSSL_RECORD_TEMPLATE *templates, | |
1498 | size_t numtempl, | |
1499 | OSSL_RECORD_TEMPLATE *prefixtempl, | |
1500 | WPACKET *pkt, | |
1501 | SSL3_BUFFER *bufs, | |
1502 | size_t *wpinited) | |
1503 | { | |
1504 | WPACKET *thispkt; | |
1505 | size_t j, align; | |
1506 | SSL3_BUFFER *wb; | |
1507 | ||
1508 | for (j = 0; j < numtempl; j++) { | |
1509 | thispkt = &pkt[j]; | |
1510 | wb = &bufs[j]; | |
1511 | ||
1512 | wb->type = templates[j].type; | |
1513 | ||
1514 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 | |
b9e37f8f MC |
1515 | align = (size_t)SSL3_BUFFER_get_buf(wb); |
1516 | align += rl->isdtls ? DTLS1_RT_HEADER_LENGTH : SSL3_RT_HEADER_LENGTH; | |
91fe8ff0 MC |
1517 | align = SSL3_ALIGN_PAYLOAD - 1 |
1518 | - ((align - 1) % SSL3_ALIGN_PAYLOAD); | |
1519 | #endif | |
1520 | SSL3_BUFFER_set_offset(wb, align); | |
1521 | ||
1522 | if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), | |
1523 | SSL3_BUFFER_get_len(wb), 0)) { | |
1524 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1525 | return 0; | |
1526 | } | |
1527 | (*wpinited)++; | |
1528 | if (!WPACKET_allocate_bytes(thispkt, align, NULL)) { | |
1529 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1530 | return 0; | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | return 1; | |
1535 | } | |
1536 | ||
aca70ca8 MC |
1537 | int tls_prepare_record_header_default(OSSL_RECORD_LAYER *rl, |
1538 | WPACKET *thispkt, | |
1539 | OSSL_RECORD_TEMPLATE *templ, | |
1540 | unsigned int rectype, | |
1541 | unsigned char **recdata) | |
1542 | { | |
1543 | size_t maxcomplen; | |
1544 | ||
1545 | *recdata = NULL; | |
1546 | ||
1547 | maxcomplen = templ->buflen; | |
1548 | if (rl->compctx != NULL) | |
1549 | maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; | |
1550 | ||
1551 | if (!WPACKET_put_bytes_u8(thispkt, rectype) | |
1552 | || !WPACKET_put_bytes_u16(thispkt, templ->version) | |
1553 | || !WPACKET_start_sub_packet_u16(thispkt) | |
1554 | || (rl->eivlen > 0 | |
1555 | && !WPACKET_allocate_bytes(thispkt, rl->eivlen, NULL)) | |
1556 | || (maxcomplen > 0 | |
1557 | && !WPACKET_reserve_bytes(thispkt, maxcomplen, | |
1558 | recdata))) { | |
1559 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | return 1; | |
1564 | } | |
1565 | ||
757ef3ba MC |
1566 | int tls_prepare_for_encryption_default(OSSL_RECORD_LAYER *rl, |
1567 | size_t mac_size, | |
1568 | WPACKET *thispkt, | |
1569 | SSL3_RECORD *thiswr) | |
1570 | { | |
1571 | size_t len; | |
1572 | unsigned char *recordstart; | |
1573 | ||
1574 | /* | |
1575 | * we should still have the output to thiswr->data and the input from | |
1576 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
1577 | * in the wb->buf | |
1578 | */ | |
1579 | ||
1580 | if (!rl->use_etm && mac_size != 0) { | |
1581 | unsigned char *mac; | |
1582 | ||
1583 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) | |
1584 | || !rl->funcs->mac(rl, thiswr, mac, 1)) { | |
1585 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1586 | return 0; | |
1587 | } | |
1588 | } | |
1589 | ||
ecacbc5e MC |
1590 | /* |
1591 | * Reserve some bytes for any growth that may occur during encryption. If | |
1592 | * we are adding the MAC independently of the cipher algorithm, then the | |
1593 | * max encrypted overhead does not need to include an allocation for that | |
1594 | * MAC | |
1595 | */ | |
1596 | if (!WPACKET_reserve_bytes(thispkt, SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD | |
1597 | - mac_size, NULL) | |
757ef3ba MC |
1598 | /* |
1599 | * We also need next the amount of bytes written to this | |
1600 | * sub-packet | |
1601 | */ | |
1602 | || !WPACKET_get_length(thispkt, &len)) { | |
1603 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | /* Get a pointer to the start of this record excluding header */ | |
1608 | recordstart = WPACKET_get_curr(thispkt) - len; | |
1609 | SSL3_RECORD_set_data(thiswr, recordstart); | |
1610 | SSL3_RECORD_reset_input(thiswr); | |
1611 | SSL3_RECORD_set_length(thiswr, len); | |
1612 | ||
1613 | return 1; | |
1614 | } | |
1615 | ||
2a354d54 MC |
1616 | int tls_post_encryption_processing_default(OSSL_RECORD_LAYER *rl, |
1617 | size_t mac_size, | |
1618 | OSSL_RECORD_TEMPLATE *thistempl, | |
1619 | WPACKET *thispkt, | |
1620 | SSL3_RECORD *thiswr) | |
1621 | { | |
1622 | size_t origlen, len; | |
b9e37f8f MC |
1623 | size_t headerlen = rl->isdtls ? DTLS1_RT_HEADER_LENGTH |
1624 | : SSL3_RT_HEADER_LENGTH; | |
2a354d54 MC |
1625 | |
1626 | /* Allocate bytes for the encryption overhead */ | |
1627 | if (!WPACKET_get_length(thispkt, &origlen) | |
830eae60 | 1628 | /* Check we allowed enough room for the encryption growth */ |
ecacbc5e MC |
1629 | || !ossl_assert(origlen + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD |
1630 | - mac_size >= thiswr->length) | |
2a354d54 MC |
1631 | /* Encryption should never shrink the data! */ |
1632 | || origlen > thiswr->length | |
1633 | || (thiswr->length > origlen | |
1634 | && !WPACKET_allocate_bytes(thispkt, | |
1635 | thiswr->length - origlen, | |
1636 | NULL))) { | |
1637 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1638 | return 0; | |
1639 | } | |
1640 | if (rl->use_etm && mac_size != 0) { | |
1641 | unsigned char *mac; | |
1642 | ||
1643 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) | |
1644 | || !rl->funcs->mac(rl, thiswr, mac, 1)) { | |
1645 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | SSL3_RECORD_add_length(thiswr, mac_size); | |
1650 | } | |
1651 | ||
1652 | if (!WPACKET_get_length(thispkt, &len) | |
1653 | || !WPACKET_close(thispkt)) { | |
1654 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | if (rl->msg_callback != NULL) { | |
1659 | unsigned char *recordstart; | |
1660 | ||
b9e37f8f | 1661 | recordstart = WPACKET_get_curr(thispkt) - len - headerlen; |
2a354d54 | 1662 | rl->msg_callback(1, thiswr->rec_version, SSL3_RT_HEADER, recordstart, |
b9e37f8f | 1663 | headerlen, rl->cbarg); |
2a354d54 MC |
1664 | |
1665 | if (rl->version == TLS1_3_VERSION && rl->enc_ctx != NULL) { | |
1666 | unsigned char ctype = thistempl->type; | |
1667 | ||
1668 | rl->msg_callback(1, thiswr->rec_version, SSL3_RT_INNER_CONTENT_TYPE, | |
1669 | &ctype, 1, rl->cbarg); | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | if (!WPACKET_finish(thispkt)) { | |
1674 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1675 | return 0; | |
1676 | } | |
1677 | ||
b9e37f8f | 1678 | SSL3_RECORD_add_length(thiswr, headerlen); |
2a354d54 MC |
1679 | |
1680 | return 1; | |
1681 | } | |
1682 | ||
bafe524b MC |
1683 | int tls_write_records_default(OSSL_RECORD_LAYER *rl, |
1684 | OSSL_RECORD_TEMPLATE *templates, | |
1685 | size_t numtempl) | |
34a4068c | 1686 | { |
2b71b042 MC |
1687 | WPACKET pkt[SSL_MAX_PIPELINES + 1]; |
1688 | SSL3_RECORD wr[SSL_MAX_PIPELINES + 1]; | |
1689 | WPACKET *thispkt; | |
1690 | SSL3_RECORD *thiswr; | |
9251c3c4 | 1691 | int mac_size = 0, ret = 0; |
2a354d54 | 1692 | size_t wpinited = 0; |
2b71b042 | 1693 | size_t j, prefix = 0; |
2b71b042 MC |
1694 | OSSL_RECORD_TEMPLATE prefixtempl; |
1695 | OSSL_RECORD_TEMPLATE *thistempl; | |
1696 | ||
bfda3aee MC |
1697 | if (rl->md_ctx != NULL && EVP_MD_CTX_get0_md(rl->md_ctx) != NULL) { |
1698 | mac_size = EVP_MD_CTX_get_size(rl->md_ctx); | |
1699 | if (mac_size < 0) { | |
1700 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1701 | goto err; | |
2b71b042 MC |
1702 | } |
1703 | } | |
bfda3aee | 1704 | |
91fe8ff0 MC |
1705 | if (!rl->funcs->allocate_write_buffers(rl, templates, numtempl, &prefix)) { |
1706 | /* RLAYERfatal() already called */ | |
1707 | goto err; | |
1708 | } | |
2b71b042 | 1709 | |
91fe8ff0 MC |
1710 | if (!rl->funcs->initialise_write_packets(rl, templates, numtempl, |
1711 | &prefixtempl, pkt, rl->wbuf, | |
1712 | &wpinited)) { | |
23bf52a4 MC |
1713 | /* RLAYERfatal() already called */ |
1714 | goto err; | |
2b71b042 MC |
1715 | } |
1716 | ||
2b71b042 MC |
1717 | /* Clear our SSL3_RECORD structures */ |
1718 | memset(wr, 0, sizeof(wr)); | |
1719 | for (j = 0; j < numtempl + prefix; j++) { | |
2b71b042 | 1720 | unsigned char *compressdata = NULL; |
2b71b042 MC |
1721 | unsigned int rectype; |
1722 | ||
1723 | thispkt = &pkt[j]; | |
1724 | thiswr = &wr[j]; | |
91fe8ff0 | 1725 | thistempl = (j < prefix) ? &prefixtempl : &templates[j - prefix]; |
2b71b042 MC |
1726 | |
1727 | /* | |
7ca61d63 MC |
1728 | * Default to the record type as specified in the template unless the |
1729 | * protocol implementation says differently. | |
2b71b042 | 1730 | */ |
7ca61d63 MC |
1731 | if (rl->funcs->get_record_type != NULL) |
1732 | rectype = rl->funcs->get_record_type(rl, thistempl); | |
2b71b042 MC |
1733 | else |
1734 | rectype = thistempl->type; | |
1735 | ||
1736 | SSL3_RECORD_set_type(thiswr, rectype); | |
1d367677 | 1737 | SSL3_RECORD_set_rec_version(thiswr, thistempl->version); |
2b71b042 | 1738 | |
aca70ca8 MC |
1739 | if (!rl->funcs->prepare_record_header(rl, thispkt, thistempl, rectype, |
1740 | &compressdata)) { | |
2582de25 | 1741 | /* RLAYERfatal() already called */ |
2b71b042 MC |
1742 | goto err; |
1743 | } | |
1744 | ||
1745 | /* lets setup the record stuff. */ | |
1746 | SSL3_RECORD_set_data(thiswr, compressdata); | |
1747 | SSL3_RECORD_set_length(thiswr, thistempl->buflen); | |
4fed6ee1 | 1748 | |
2b71b042 | 1749 | SSL3_RECORD_set_input(thiswr, (unsigned char *)thistempl->buf); |
2b71b042 MC |
1750 | |
1751 | /* | |
1752 | * we now 'read' from thiswr->input, thiswr->length bytes into | |
1753 | * thiswr->data | |
1754 | */ | |
1755 | ||
1756 | /* first we compress */ | |
9251c3c4 MC |
1757 | if (rl->compctx != NULL) { |
1758 | if (!tls_do_compress(rl, thiswr) | |
2b71b042 | 1759 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { |
320145d5 | 1760 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_COMPRESSION_FAILURE); |
2b71b042 MC |
1761 | goto err; |
1762 | } | |
aca70ca8 MC |
1763 | } else if (compressdata != NULL) { |
1764 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { | |
1765 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1766 | goto err; | |
2b71b042 | 1767 | } |
aca70ca8 | 1768 | SSL3_RECORD_reset_input(&wr[j]); |
2b71b042 MC |
1769 | } |
1770 | ||
2582de25 MC |
1771 | if (rl->funcs->add_record_padding != NULL |
1772 | && !rl->funcs->add_record_padding(rl, thistempl, thispkt, | |
1773 | thiswr)) { | |
1774 | /* RLAYERfatal() already called */ | |
1775 | goto err; | |
2b71b042 MC |
1776 | } |
1777 | ||
757ef3ba MC |
1778 | if (!rl->funcs->prepare_for_encryption(rl, mac_size, thispkt, thiswr)) { |
1779 | /* RLAYERfatal() already called */ | |
1780 | goto err; | |
2b71b042 MC |
1781 | } |
1782 | } | |
1783 | ||
b6f7519b MC |
1784 | if (prefix) { |
1785 | if (rl->funcs->cipher(rl, wr, 1, 1, NULL, mac_size) < 1) { | |
4bf610bd | 1786 | if (rl->alert == SSL_AD_NO_ALERT) { |
2f6e24eb MC |
1787 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
1788 | } | |
1789 | goto err; | |
1790 | } | |
2b71b042 MC |
1791 | } |
1792 | ||
b6f7519b MC |
1793 | if (rl->funcs->cipher(rl, wr + prefix, numtempl, 1, NULL, mac_size) < 1) { |
1794 | if (rl->alert == SSL_AD_NO_ALERT) { | |
1795 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1796 | } | |
1797 | goto err; | |
1798 | } | |
1799 | ||
91fe8ff0 | 1800 | for (j = 0; j < numtempl + prefix; j++) { |
2b71b042 MC |
1801 | thispkt = &pkt[j]; |
1802 | thiswr = &wr[j]; | |
91fe8ff0 | 1803 | thistempl = (j < prefix) ? &prefixtempl : &templates[j - prefix]; |
2b71b042 | 1804 | |
2a354d54 MC |
1805 | if (!rl->funcs->post_encryption_processing(rl, mac_size, thistempl, |
1806 | thispkt, thiswr)) { | |
1807 | /* RLAYERfatal() already called */ | |
2b71b042 MC |
1808 | goto err; |
1809 | } | |
1810 | ||
2b71b042 | 1811 | /* now let's set up wb */ |
151f313e | 1812 | SSL3_BUFFER_set_left(&rl->wbuf[j], SSL3_RECORD_get_length(thiswr)); |
2b71b042 MC |
1813 | } |
1814 | ||
23bf52a4 | 1815 | ret = 1; |
2b71b042 MC |
1816 | err: |
1817 | for (j = 0; j < wpinited; j++) | |
1818 | WPACKET_cleanup(&pkt[j]); | |
23bf52a4 MC |
1819 | return ret; |
1820 | } | |
1821 | ||
1822 | int tls_write_records(OSSL_RECORD_LAYER *rl, OSSL_RECORD_TEMPLATE *templates, | |
1823 | size_t numtempl) | |
1824 | { | |
23bf52a4 MC |
1825 | /* Check we don't have pending data waiting to write */ |
1826 | if (!ossl_assert(rl->nextwbuf >= rl->numwpipes | |
1827 | || SSL3_BUFFER_get_left(&rl->wbuf[rl->nextwbuf]) == 0)) { | |
1828 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
1829 | return OSSL_RECORD_RETURN_FATAL; | |
1830 | } | |
1831 | ||
bafe524b | 1832 | if (!rl->funcs->write_records(rl, templates, numtempl)) { |
23bf52a4 MC |
1833 | /* RLAYERfatal already called */ |
1834 | return OSSL_RECORD_RETURN_FATAL; | |
1835 | } | |
23bf52a4 MC |
1836 | |
1837 | rl->nextwbuf = 0; | |
1838 | /* we now just need to write the buffers */ | |
1839 | return tls_retry_write_records(rl); | |
34a4068c MC |
1840 | } |
1841 | ||
2b71b042 | 1842 | int tls_retry_write_records(OSSL_RECORD_LAYER *rl) |
34a4068c | 1843 | { |
320145d5 | 1844 | int i, ret; |
2b71b042 | 1845 | SSL3_BUFFER *thiswb; |
2b71b042 | 1846 | size_t tmpwrit = 0; |
2b71b042 | 1847 | |
e7694c69 | 1848 | if (rl->nextwbuf >= rl->numwpipes) |
320145d5 | 1849 | return OSSL_RECORD_RETURN_SUCCESS; |
151f313e | 1850 | |
2b71b042 | 1851 | for (;;) { |
151f313e MC |
1852 | thiswb = &rl->wbuf[rl->nextwbuf]; |
1853 | ||
2b71b042 | 1854 | clear_sys_error(); |
b5cf81f7 | 1855 | if (rl->bio != NULL) { |
ace38195 MC |
1856 | if (rl->funcs->prepare_write_bio != NULL) { |
1857 | ret = rl->funcs->prepare_write_bio(rl, thiswb->type); | |
1858 | if (ret != OSSL_RECORD_RETURN_SUCCESS) | |
320145d5 | 1859 | return ret; |
2b71b042 | 1860 | } |
b5cf81f7 | 1861 | i = BIO_write(rl->bio, (char *) |
2b71b042 MC |
1862 | &(SSL3_BUFFER_get_buf(thiswb) |
1863 | [SSL3_BUFFER_get_offset(thiswb)]), | |
1864 | (unsigned int)SSL3_BUFFER_get_left(thiswb)); | |
320145d5 | 1865 | if (i >= 0) { |
2b71b042 | 1866 | tmpwrit = i; |
320145d5 MC |
1867 | if (i == 0 && BIO_should_retry(rl->bio)) |
1868 | ret = OSSL_RECORD_RETURN_RETRY; | |
1869 | else | |
1870 | ret = OSSL_RECORD_RETURN_SUCCESS; | |
1871 | } else { | |
1872 | if (BIO_should_retry(rl->bio)) | |
1873 | ret = OSSL_RECORD_RETURN_RETRY; | |
1874 | else | |
1875 | ret = OSSL_RECORD_RETURN_FATAL; | |
1876 | } | |
2b71b042 | 1877 | } else { |
320145d5 MC |
1878 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_BIO_NOT_SET); |
1879 | ret = OSSL_RECORD_RETURN_FATAL; | |
2b71b042 MC |
1880 | i = -1; |
1881 | } | |
1882 | ||
1883 | /* | |
1884 | * When an empty fragment is sent on a connection using KTLS, | |
1885 | * it is sent as a write of zero bytes. If this zero byte | |
1886 | * write succeeds, i will be 0 rather than a non-zero value. | |
1887 | * Treat i == 0 as success rather than an error for zero byte | |
1888 | * writes to permit this case. | |
1889 | */ | |
1890 | if (i >= 0 && tmpwrit == SSL3_BUFFER_get_left(thiswb)) { | |
1891 | SSL3_BUFFER_set_left(thiswb, 0); | |
1892 | SSL3_BUFFER_add_offset(thiswb, tmpwrit); | |
e7694c69 | 1893 | if (++(rl->nextwbuf) < rl->numwpipes) |
2b71b042 | 1894 | continue; |
151f313e | 1895 | |
e7694c69 | 1896 | if (rl->nextwbuf == rl->numwpipes |
151f313e MC |
1897 | && (rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0) |
1898 | tls_release_write_buffer(rl); | |
320145d5 | 1899 | return OSSL_RECORD_RETURN_SUCCESS; |
2b71b042 | 1900 | } else if (i <= 0) { |
5361a5a9 | 1901 | if (rl->isdtls) { |
2b71b042 MC |
1902 | /* |
1903 | * For DTLS, just drop it. That's kind of the whole point in | |
1904 | * using a datagram service | |
1905 | */ | |
1906 | SSL3_BUFFER_set_left(thiswb, 0); | |
e7694c69 | 1907 | if (++(rl->nextwbuf) == rl->numwpipes |
151f313e MC |
1908 | && (rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0) |
1909 | tls_release_write_buffer(rl); | |
1910 | ||
2b71b042 | 1911 | } |
320145d5 | 1912 | return ret; |
2b71b042 MC |
1913 | } |
1914 | SSL3_BUFFER_add_offset(thiswb, tmpwrit); | |
1915 | SSL3_BUFFER_sub_left(thiswb, tmpwrit); | |
1916 | } | |
34a4068c MC |
1917 | } |
1918 | ||
1853d20a | 1919 | int tls_get_alert_code(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
1920 | { |
1921 | return rl->alert; | |
1922 | } | |
1923 | ||
1853d20a | 1924 | int tls_set1_bio(OSSL_RECORD_LAYER *rl, BIO *bio) |
e2d5742b MC |
1925 | { |
1926 | if (bio != NULL && !BIO_up_ref(bio)) | |
1927 | return 0; | |
1928 | BIO_free(rl->bio); | |
1929 | rl->bio = bio; | |
1930 | ||
1931 | return 1; | |
1932 | } | |
1933 | ||
1853d20a MC |
1934 | /* Shared by most methods except tlsany_meth */ |
1935 | int tls_default_set_protocol_version(OSSL_RECORD_LAYER *rl, int version) | |
1936 | { | |
1937 | if (rl->version != version) | |
1938 | return 0; | |
1939 | ||
1940 | return 1; | |
1941 | } | |
1942 | ||
1943 | int tls_set_protocol_version(OSSL_RECORD_LAYER *rl, int version) | |
1944 | { | |
1945 | return rl->funcs->set_protocol_version(rl, version); | |
1946 | } | |
1947 | ||
1948 | void tls_set_plain_alerts(OSSL_RECORD_LAYER *rl, int allow) | |
1949 | { | |
1950 | rl->allow_plain_alerts = allow; | |
1951 | } | |
1952 | ||
1953 | void tls_set_first_handshake(OSSL_RECORD_LAYER *rl, int first) | |
1954 | { | |
1955 | rl->is_first_handshake = first; | |
1956 | } | |
1957 | ||
8124ab56 MC |
1958 | void tls_set_max_pipelines(OSSL_RECORD_LAYER *rl, size_t max_pipelines) |
1959 | { | |
1960 | rl->max_pipelines = max_pipelines; | |
1961 | if (max_pipelines > 1) | |
1962 | rl->read_ahead = 1; | |
1963 | } | |
1964 | ||
d0b17ea0 MC |
1965 | void tls_get_state(OSSL_RECORD_LAYER *rl, const char **shortstr, |
1966 | const char **longstr) | |
1967 | { | |
1968 | const char *shrt, *lng; | |
1704961c | 1969 | |
d0b17ea0 MC |
1970 | switch (rl->rstate) { |
1971 | case SSL_ST_READ_HEADER: | |
1972 | shrt = "RH"; | |
1973 | lng = "read header"; | |
1974 | break; | |
1975 | case SSL_ST_READ_BODY: | |
1976 | shrt = "RB"; | |
1977 | lng = "read body"; | |
1978 | break; | |
1979 | default: | |
1980 | shrt = lng = "unknown"; | |
1981 | break; | |
1982 | } | |
1983 | if (shortstr != NULL) | |
1984 | *shortstr = shrt; | |
1985 | if (longstr != NULL) | |
1986 | *longstr = lng; | |
1987 | } | |
1988 | ||
1e76110b MC |
1989 | const COMP_METHOD *tls_get_compression(OSSL_RECORD_LAYER *rl) |
1990 | { | |
1991 | #ifndef OPENSSL_NO_COMP | |
1992 | return (rl->compctx == NULL) ? NULL : COMP_CTX_get_method(rl->compctx); | |
1993 | #else | |
1994 | return NULL; | |
1995 | #endif | |
1996 | } | |
1997 | ||
435d88d7 MC |
1998 | void tls_set_max_frag_len(OSSL_RECORD_LAYER *rl, size_t max_frag_len) |
1999 | { | |
2000 | rl->max_frag_len = max_frag_len; | |
2001 | /* | |
2002 | * We don't need to adjust buffer sizes. Write buffer sizes are | |
2003 | * automatically checked anyway. We should only be changing the read buffer | |
2004 | * size during the handshake, so we will create a new buffer when we create | |
2005 | * the new record layer. We can't change the existing buffer because it may | |
2006 | * already have data in it. | |
2007 | */ | |
2008 | } | |
2009 | ||
b92fc4ae MC |
2010 | int tls_increment_sequence_ctr(OSSL_RECORD_LAYER *rl) |
2011 | { | |
2012 | int i; | |
2013 | ||
2014 | /* Increment the sequence counter */ | |
2015 | for (i = SEQ_NUM_SIZE; i > 0; i--) { | |
2016 | ++(rl->sequence[i - 1]); | |
2017 | if (rl->sequence[i - 1] != 0) | |
2018 | break; | |
2019 | } | |
2020 | if (i == 0) { | |
2021 | /* Sequence has wrapped */ | |
2022 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_SEQUENCE_CTR_WRAPPED); | |
2023 | return 0; | |
2024 | } | |
2025 | return 1; | |
2026 | } | |
2027 | ||
7eb39ecb MC |
2028 | int tls_alloc_buffers(OSSL_RECORD_LAYER *rl) |
2029 | { | |
2030 | if (rl->direction == OSSL_RECORD_DIRECTION_WRITE) { | |
2031 | /* If we have a pending write then buffers are already allocated */ | |
2032 | if (rl->nextwbuf < rl->numwpipes) | |
2033 | return 1; | |
2034 | /* | |
2035 | * We assume 1 pipe with default sized buffer. If what we need ends up | |
2036 | * being a different size to that then it will be reallocated on demand. | |
2037 | * If we need more than 1 pipe then that will also be allocated on | |
2038 | * demand | |
2039 | */ | |
2040 | if (!tls_setup_write_buffer(rl, 1, 0, 0)) | |
2041 | return 0; | |
2042 | ||
2043 | /* | |
2044 | * Normally when we allocate write buffers we immediately write | |
2045 | * something into it. In this case we're not doing that so mark the | |
2046 | * buffer as empty. | |
2047 | */ | |
2048 | SSL3_BUFFER_set_left(&rl->wbuf[0], 0); | |
2049 | return 1; | |
2050 | } | |
2051 | ||
2052 | /* Read direction */ | |
2053 | ||
2054 | /* If we have pending data to be read then buffers are already allocated */ | |
2055 | if (rl->curr_rec < rl->num_recs || SSL3_BUFFER_get_left(&rl->rbuf) != 0) | |
2056 | return 1; | |
2057 | return tls_setup_read_buffer(rl); | |
2058 | } | |
2059 | ||
2060 | int tls_free_buffers(OSSL_RECORD_LAYER *rl) | |
2061 | { | |
2062 | if (rl->direction == OSSL_RECORD_DIRECTION_WRITE) { | |
2063 | if (rl->nextwbuf < rl->numwpipes) { | |
2064 | /* | |
2065 | * We may have pending data. If we've just got one empty buffer | |
2066 | * allocated then it has probably just been alloc'd via | |
2067 | * tls_alloc_buffers, and it is fine to free it. Otherwise this | |
2068 | * looks like real pending data and it is an error. | |
2069 | */ | |
2070 | if (rl->nextwbuf != 0 | |
2071 | || rl->numwpipes != 1 | |
2072 | || SSL3_BUFFER_get_left(&rl->wbuf[0]) != 0) | |
2073 | return 0; | |
2074 | } | |
2075 | tls_release_write_buffer(rl); | |
2076 | return 1; | |
2077 | } | |
2078 | ||
2079 | /* Read direction */ | |
2080 | ||
2081 | /* If we have pending data to be read then fail */ | |
2082 | if (rl->curr_rec < rl->num_recs || SSL3_BUFFER_get_left(&rl->rbuf) != 0) | |
2083 | return 0; | |
2084 | ||
2085 | return tls_release_read_buffer(rl); | |
2086 | } | |
2087 | ||
34a4068c MC |
2088 | const OSSL_RECORD_METHOD ossl_tls_record_method = { |
2089 | tls_new_record_layer, | |
2090 | tls_free, | |
2091 | tls_reset, | |
2092 | tls_unprocessed_read_pending, | |
2093 | tls_processed_read_pending, | |
2094 | tls_app_data_pending, | |
34a4068c | 2095 | tls_get_max_records, |
2b71b042 MC |
2096 | tls_write_records, |
2097 | tls_retry_write_records, | |
34a4068c | 2098 | tls_read_record, |
e2d5742b MC |
2099 | tls_release_record, |
2100 | tls_get_alert_code, | |
2101 | tls_set1_bio, | |
1853d20a MC |
2102 | tls_set_protocol_version, |
2103 | tls_set_plain_alerts, | |
2104 | tls_set_first_handshake, | |
8124ab56 | 2105 | tls_set_max_pipelines, |
d0b17ea0 | 2106 | NULL, |
4566dae7 | 2107 | tls_get_state, |
1e76110b | 2108 | tls_set_options, |
435d88d7 | 2109 | tls_get_compression, |
4f428e86 | 2110 | tls_set_max_frag_len, |
b92fc4ae | 2111 | NULL, |
7eb39ecb MC |
2112 | tls_increment_sequence_ctr, |
2113 | tls_alloc_buffers, | |
2114 | tls_free_buffers | |
cc110a0a | 2115 | }; |