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