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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> | |
15 | #include "internal/e_os.h" | |
4030869d | 16 | #include "internal/packet.h" |
4840c2a5 MC |
17 | #include "../../ssl_local.h" |
18 | #include "../record_local.h" | |
50023e9b | 19 | #include "recmethod_local.h" |
e2d5742b | 20 | |
23bf52a4 MC |
21 | #if defined(OPENSSL_SMALL_FOOTPRINT) || \ |
22 | !( defined(AES_ASM) && ( \ | |
23 | defined(__x86_64) || defined(__x86_64__) || \ | |
24 | defined(_M_AMD64) || defined(_M_X64) ) \ | |
25 | ) | |
26 | # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK | |
27 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
28 | #endif | |
29 | ||
359affde MC |
30 | static void tls_int_free(OSSL_RECORD_LAYER *rl); |
31 | ||
50023e9b MC |
32 | void ossl_rlayer_fatal(OSSL_RECORD_LAYER *rl, int al, int reason, |
33 | const char *fmt, ...) | |
e2d5742b MC |
34 | { |
35 | va_list args; | |
36 | ||
37 | va_start(args, fmt); | |
38 | ERR_vset_error(ERR_LIB_SSL, reason, fmt, args); | |
39 | va_end(args); | |
40 | ||
41 | rl->alert = al; | |
42 | } | |
43 | ||
50023e9b MC |
44 | int ossl_set_tls_provider_parameters(OSSL_RECORD_LAYER *rl, |
45 | EVP_CIPHER_CTX *ctx, | |
46 | const EVP_CIPHER *ciph, | |
7f2f0ac7 | 47 | const EVP_MD *md) |
aedbb71b MC |
48 | { |
49 | /* | |
50 | * Provided cipher, the TLS padding/MAC removal is performed provider | |
51 | * side so we need to tell the ctx about our TLS version and mac size | |
52 | */ | |
53 | OSSL_PARAM params[3], *pprm = params; | |
54 | size_t macsize = 0; | |
55 | int imacsize = -1; | |
56 | ||
57 | if ((EVP_CIPHER_get_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0 | |
7f2f0ac7 | 58 | && !rl->use_etm) |
aedbb71b MC |
59 | imacsize = EVP_MD_get_size(md); |
60 | if (imacsize >= 0) | |
61 | macsize = (size_t)imacsize; | |
62 | ||
63 | *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION, | |
64 | &rl->version); | |
65 | *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE, | |
66 | &macsize); | |
67 | *pprm = OSSL_PARAM_construct_end(); | |
68 | ||
69 | if (!EVP_CIPHER_CTX_set_params(ctx, params)) { | |
7c293999 | 70 | ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR); |
aedbb71b MC |
71 | return 0; |
72 | } | |
73 | ||
74 | return 1; | |
75 | } | |
76 | ||
50023e9b MC |
77 | /* |
78 | * ssl3_cbc_record_digest_supported returns 1 iff |ctx| uses a hash function | |
79 | * which ssl3_cbc_digest_record supports. | |
aedbb71b | 80 | */ |
50023e9b | 81 | char ssl3_cbc_record_digest_supported(const EVP_MD_CTX *ctx) |
2b891e30 | 82 | { |
50023e9b MC |
83 | switch (EVP_MD_CTX_get_type(ctx)) { |
84 | case NID_md5: | |
85 | case NID_sha1: | |
86 | case NID_sha224: | |
87 | case NID_sha256: | |
88 | case NID_sha384: | |
89 | case NID_sha512: | |
2b891e30 | 90 | return 1; |
50023e9b | 91 | default: |
aedbb71b | 92 | return 0; |
aedbb71b | 93 | } |
aedbb71b MC |
94 | } |
95 | ||
976b263d | 96 | #ifndef OPENSSL_NO_COMP |
9b7fb65e | 97 | static int tls_allow_compression(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
98 | { |
99 | if (rl->options & SSL_OP_NO_COMPRESSION) | |
100 | return 0; | |
ed0e298f | 101 | |
b85ebc4b MC |
102 | return rl->security == NULL |
103 | || rl->security(rl->cbarg, SSL_SECOP_COMPRESSION, 0, 0, NULL); | |
e2d5742b | 104 | } |
976b263d | 105 | #endif |
e2d5742b | 106 | |
23bf52a4 MC |
107 | static void tls_release_write_buffer_int(OSSL_RECORD_LAYER *rl, size_t start) |
108 | { | |
109 | SSL3_BUFFER *wb; | |
110 | size_t pipes; | |
111 | ||
112 | pipes = rl->numwpipes; | |
113 | ||
114 | while (pipes > start) { | |
115 | wb = &rl->wbuf[pipes - 1]; | |
116 | ||
117 | if (SSL3_BUFFER_is_app_buffer(wb)) | |
118 | SSL3_BUFFER_set_app_buffer(wb, 0); | |
119 | else | |
120 | OPENSSL_free(wb->buf); | |
121 | wb->buf = NULL; | |
122 | pipes--; | |
123 | } | |
124 | } | |
125 | ||
85b358b0 MC |
126 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
127 | # ifndef OPENSSL_NO_COMP | |
128 | # define MAX_PREFIX_LEN ((SSL3_ALIGN_PAYLOAD - 1) \ | |
129 | + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \ | |
130 | + SSL3_RT_HEADER_LENGTH \ | |
131 | + SSL3_RT_MAX_COMPRESSED_OVERHEAD) | |
132 | # else | |
133 | # define MAX_PREFIX_LEN ((SSL3_ALIGN_PAYLOAD - 1) \ | |
134 | + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \ | |
135 | + SSL3_RT_HEADER_LENGTH) | |
136 | # endif /* OPENSSL_NO_COMP */ | |
137 | #else | |
138 | # ifndef OPENSSL_NO_COMP | |
139 | # define MAX_PREFIX_LEN (SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \ | |
140 | + SSL3_RT_HEADER_LENGTH \ | |
141 | + SSL3_RT_MAX_COMPRESSED_OVERHEAD) | |
142 | # else | |
143 | # define MAX_PREFIX_LEN (SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \ | |
144 | + SSL3_RT_HEADER_LENGTH) | |
145 | # endif /* OPENSSL_NO_COMP */ | |
146 | #endif | |
147 | ||
151f313e | 148 | static int tls_setup_write_buffer(OSSL_RECORD_LAYER *rl, size_t numwpipes, |
85b358b0 | 149 | size_t firstlen, size_t nextlen) |
151f313e MC |
150 | { |
151 | unsigned char *p; | |
152 | size_t align = 0, headerlen; | |
153 | SSL3_BUFFER *wb; | |
154 | size_t currpipe; | |
155 | SSL_CONNECTION *s = (SSL_CONNECTION *)rl->cbarg; | |
85b358b0 | 156 | size_t defltlen = 0; |
151f313e | 157 | |
85b358b0 | 158 | if (firstlen == 0 || (numwpipes > 1 && nextlen == 0)) { |
320145d5 | 159 | if (rl->isdtls) |
151f313e MC |
160 | headerlen = DTLS1_RT_HEADER_LENGTH + 1; |
161 | else | |
162 | headerlen = SSL3_RT_HEADER_LENGTH; | |
163 | ||
85b358b0 | 164 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
151f313e MC |
165 | align = SSL3_ALIGN_PAYLOAD - 1; |
166 | #endif | |
167 | ||
85b358b0 | 168 | defltlen = ssl_get_max_send_fragment(s) |
151f313e MC |
169 | + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; |
170 | #ifndef OPENSSL_NO_COMP | |
171 | if (ssl_allow_compression(s)) | |
85b358b0 | 172 | defltlen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
151f313e MC |
173 | #endif |
174 | if (!(rl->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) | |
85b358b0 | 175 | defltlen += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; |
151f313e MC |
176 | } |
177 | ||
178 | wb = rl->wbuf; | |
179 | for (currpipe = 0; currpipe < numwpipes; currpipe++) { | |
180 | SSL3_BUFFER *thiswb = &wb[currpipe]; | |
85b358b0 MC |
181 | size_t len = (currpipe == 0) ? firstlen : nextlen; |
182 | ||
183 | if (len == 0) | |
184 | len = defltlen; | |
151f313e MC |
185 | |
186 | if (thiswb->len != len) { | |
187 | OPENSSL_free(thiswb->buf); | |
188 | thiswb->buf = NULL; /* force reallocation */ | |
189 | } | |
190 | ||
191 | if (thiswb->buf == NULL) { | |
192 | if (s->wbio == NULL || !BIO_get_ktls_send(s->wbio)) { | |
193 | p = OPENSSL_malloc(len); | |
194 | if (p == NULL) { | |
23bf52a4 MC |
195 | if (rl->numwpipes < currpipe) |
196 | rl->numwpipes = currpipe; | |
151f313e MC |
197 | /* |
198 | * We've got a malloc failure, and we're still initialising | |
199 | * buffers. We assume we're so doomed that we won't even be able | |
200 | * to send an alert. | |
201 | */ | |
320145d5 | 202 | RLAYERfatal(rl, SSL_AD_NO_ALERT, ERR_R_MALLOC_FAILURE); |
151f313e MC |
203 | return 0; |
204 | } | |
205 | } else { | |
206 | p = NULL; | |
207 | } | |
208 | memset(thiswb, 0, sizeof(SSL3_BUFFER)); | |
209 | thiswb->buf = p; | |
210 | thiswb->len = len; | |
211 | } | |
212 | } | |
213 | ||
23bf52a4 MC |
214 | /* Free any previously allocated buffers that we are no longer using */ |
215 | tls_release_write_buffer_int(rl, currpipe); | |
216 | ||
217 | rl->numwpipes = numwpipes; | |
218 | ||
151f313e MC |
219 | return 1; |
220 | } | |
221 | ||
222 | static void tls_release_write_buffer(OSSL_RECORD_LAYER *rl) | |
223 | { | |
23bf52a4 | 224 | tls_release_write_buffer_int(rl, 0); |
e7694c69 MC |
225 | |
226 | rl->numwpipes = 0; | |
151f313e MC |
227 | } |
228 | ||
9b7fb65e | 229 | int tls_setup_read_buffer(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
230 | { |
231 | unsigned char *p; | |
232 | size_t len, align = 0, headerlen; | |
233 | SSL3_BUFFER *b; | |
234 | ||
235 | b = &rl->rbuf; | |
236 | ||
237 | if (rl->isdtls) | |
238 | headerlen = DTLS1_RT_HEADER_LENGTH; | |
239 | else | |
240 | headerlen = SSL3_RT_HEADER_LENGTH; | |
241 | ||
1704961c | 242 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
e2d5742b MC |
243 | align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); |
244 | #endif | |
245 | ||
246 | if (b->buf == NULL) { | |
247 | len = SSL3_RT_MAX_PLAIN_LENGTH | |
248 | + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; | |
249 | #ifndef OPENSSL_NO_COMP | |
9b7fb65e | 250 | if (tls_allow_compression(rl)) |
e2d5742b MC |
251 | len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
252 | #endif | |
253 | if (b->default_len > len) | |
254 | len = b->default_len; | |
255 | if ((p = OPENSSL_malloc(len)) == NULL) { | |
256 | /* | |
257 | * We've got a malloc failure, and we're still initialising buffers. | |
258 | * We assume we're so doomed that we won't even be able to send an | |
259 | * alert. | |
260 | */ | |
261 | RLAYERfatal(rl, SSL_AD_NO_ALERT, ERR_R_MALLOC_FAILURE); | |
262 | return 0; | |
263 | } | |
264 | b->buf = p; | |
265 | b->len = len; | |
266 | } | |
267 | ||
268 | return 1; | |
269 | } | |
270 | ||
9b7fb65e | 271 | static int tls_release_read_buffer(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
272 | { |
273 | SSL3_BUFFER *b; | |
274 | ||
275 | b = &rl->rbuf; | |
1704961c | 276 | if ((rl->options & SSL_OP_CLEANSE_PLAINTEXT) != 0) |
e2d5742b MC |
277 | OPENSSL_cleanse(b->buf, b->len); |
278 | OPENSSL_free(b->buf); | |
279 | b->buf = NULL; | |
280 | return 1; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Return values are as per SSL_read() | |
285 | */ | |
1853d20a MC |
286 | int tls_default_read_n(OSSL_RECORD_LAYER *rl, size_t n, size_t max, int extend, |
287 | int clearold, size_t *readbytes) | |
e2d5742b MC |
288 | { |
289 | /* | |
290 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
291 | * packet by another n bytes. The packet will be in the sub-array of | |
b0a9042e MC |
292 | * rl->rbuf.buf specified by rl->packet and rl->packet_length. (If |
293 | * rl->read_ahead is set, 'max' bytes may be stored in rbuf [plus | |
294 | * rl->packet_length bytes if extend == 1].) if clearold == 1, move the | |
295 | * packet to the start of the buffer; if clearold == 0 then leave any old | |
296 | * packets where they were | |
e2d5742b MC |
297 | */ |
298 | size_t len, left, align = 0; | |
299 | unsigned char *pkt; | |
300 | SSL3_BUFFER *rb; | |
301 | ||
302 | if (n == 0) | |
303 | return OSSL_RECORD_RETURN_NON_FATAL_ERR; | |
304 | ||
305 | rb = &rl->rbuf; | |
e2d5742b MC |
306 | left = rb->left; |
307 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 | |
308 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; | |
309 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); | |
310 | #endif | |
311 | ||
312 | if (!extend) { | |
313 | /* start with empty packet ... */ | |
314 | if (left == 0) { | |
315 | rb->offset = align; | |
316 | } else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
317 | /* | |
318 | * check if next packet length is large enough to justify payload | |
319 | * alignment... | |
320 | */ | |
321 | pkt = rb->buf + rb->offset; | |
322 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
323 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
324 | /* | |
325 | * Note that even if packet is corrupted and its length field | |
326 | * is insane, we can only be led to wrong decision about | |
327 | * whether memmove will occur or not. Header values has no | |
328 | * effect on memmove arguments and therefore no buffer | |
329 | * overrun can be triggered. | |
330 | */ | |
331 | memmove(rb->buf + align, pkt, left); | |
332 | rb->offset = align; | |
333 | } | |
334 | } | |
335 | rl->packet = rb->buf + rb->offset; | |
336 | rl->packet_length = 0; | |
337 | /* ... now we can act as if 'extend' was set */ | |
338 | } | |
339 | ||
340 | len = rl->packet_length; | |
341 | pkt = rb->buf + align; | |
342 | /* | |
343 | * Move any available bytes to front of buffer: 'len' bytes already | |
344 | * pointed to by 'packet', 'left' extra ones at the end | |
345 | */ | |
346 | if (rl->packet != pkt && clearold == 1) { | |
347 | memmove(pkt, rl->packet, len + left); | |
348 | rl->packet = pkt; | |
349 | rb->offset = len + align; | |
350 | } | |
351 | ||
352 | /* | |
353 | * For DTLS/UDP reads should not span multiple packets because the read | |
354 | * operation returns the whole packet at once (as long as it fits into | |
355 | * the buffer). | |
356 | */ | |
357 | if (rl->isdtls) { | |
358 | if (left == 0 && extend) | |
359 | return 0; | |
360 | if (left > 0 && n > left) | |
361 | n = left; | |
362 | } | |
363 | ||
364 | /* if there is enough in the buffer from a previous read, take some */ | |
365 | if (left >= n) { | |
366 | rl->packet_length += n; | |
367 | rb->left = left - n; | |
368 | rb->offset += n; | |
369 | *readbytes = n; | |
370 | return OSSL_RECORD_RETURN_SUCCESS; | |
371 | } | |
372 | ||
373 | /* else we need to read more data */ | |
374 | ||
375 | if (n > rb->len - rb->offset) { | |
376 | /* does not happen */ | |
377 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
378 | return OSSL_RECORD_RETURN_FATAL; | |
379 | } | |
380 | ||
1853d20a MC |
381 | /* We always act like read_ahead is set for DTLS */ |
382 | if (!rl->read_ahead && !rl->isdtls) { | |
e2d5742b MC |
383 | /* ignore max parameter */ |
384 | max = n; | |
385 | } else { | |
386 | if (max < n) | |
387 | max = n; | |
388 | if (max > rb->len - rb->offset) | |
389 | max = rb->len - rb->offset; | |
390 | } | |
391 | ||
392 | while (left < n) { | |
393 | size_t bioread = 0; | |
394 | int ret; | |
359affde | 395 | BIO *bio = rl->prev != NULL ? rl->prev : rl->bio; |
e2d5742b MC |
396 | |
397 | /* | |
1704961c MC |
398 | * Now we have len+left bytes at the front of rl->rbuf.buf and |
399 | * need to read in more until we have len + n (up to len + max if | |
e2d5742b MC |
400 | * possible) |
401 | */ | |
402 | ||
403 | clear_sys_error(); | |
359affde MC |
404 | if (bio != NULL) { |
405 | ret = BIO_read(bio, pkt + len + left, max - left); | |
e2d5742b MC |
406 | if (ret > 0) { |
407 | bioread = ret; | |
408 | ret = OSSL_RECORD_RETURN_SUCCESS; | |
359affde MC |
409 | } else if (BIO_should_retry(bio)) { |
410 | if (rl->prev != NULL) { | |
411 | /* | |
412 | * We were reading from the previous epoch. Now there is no | |
413 | * more data, so swap to the actual transport BIO | |
414 | */ | |
415 | BIO_free(rl->prev); | |
416 | rl->prev = NULL; | |
417 | continue; | |
418 | } | |
e2d5742b | 419 | ret = OSSL_RECORD_RETURN_RETRY; |
359affde | 420 | } else if (BIO_eof(bio)) { |
e2d5742b MC |
421 | ret = OSSL_RECORD_RETURN_EOF; |
422 | } else { | |
423 | ret = OSSL_RECORD_RETURN_FATAL; | |
424 | } | |
425 | } else { | |
426 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_READ_BIO_NOT_SET); | |
427 | ret = OSSL_RECORD_RETURN_FATAL; | |
428 | } | |
429 | ||
430 | if (ret <= OSSL_RECORD_RETURN_RETRY) { | |
431 | rb->left = left; | |
3de76959 | 432 | if ((rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0 && !rl->isdtls) |
e2d5742b | 433 | if (len + left == 0) |
9b7fb65e | 434 | tls_release_read_buffer(rl); |
e2d5742b MC |
435 | return ret; |
436 | } | |
437 | left += bioread; | |
438 | /* | |
439 | * reads should *never* span multiple packets for DTLS because the | |
440 | * underlying transport protocol is message oriented as opposed to | |
441 | * byte oriented as in the TLS case. | |
442 | */ | |
443 | if (rl->isdtls) { | |
444 | if (n > left) | |
445 | n = left; /* makes the while condition false */ | |
446 | } | |
447 | } | |
448 | ||
449 | /* done reading, now the book-keeping */ | |
450 | rb->offset += n; | |
451 | rb->left = left - n; | |
452 | rl->packet_length += n; | |
453 | *readbytes = n; | |
454 | return OSSL_RECORD_RETURN_SUCCESS; | |
455 | } | |
456 | ||
4030869d MC |
457 | /* |
458 | * Peeks ahead into "read_ahead" data to see if we have a whole record waiting | |
459 | * for us in the buffer. | |
460 | */ | |
461 | static int tls_record_app_data_waiting(OSSL_RECORD_LAYER *rl) | |
462 | { | |
463 | SSL3_BUFFER *rbuf; | |
464 | size_t left, len; | |
465 | unsigned char *p; | |
466 | ||
467 | rbuf = &rl->rbuf; | |
468 | ||
469 | p = SSL3_BUFFER_get_buf(rbuf); | |
470 | if (p == NULL) | |
471 | return 0; | |
472 | ||
473 | left = SSL3_BUFFER_get_left(rbuf); | |
474 | ||
475 | if (left < SSL3_RT_HEADER_LENGTH) | |
476 | return 0; | |
477 | ||
478 | p += SSL3_BUFFER_get_offset(rbuf); | |
479 | ||
480 | /* | |
481 | * We only check the type and record length, we will sanity check version | |
482 | * etc later | |
483 | */ | |
484 | if (*p != SSL3_RT_APPLICATION_DATA) | |
485 | return 0; | |
486 | ||
487 | p += 3; | |
488 | n2s(p, len); | |
489 | ||
490 | if (left < SSL3_RT_HEADER_LENGTH + len) | |
491 | return 0; | |
492 | ||
493 | return 1; | |
494 | } | |
495 | ||
9dd90232 MC |
496 | static int rlayer_early_data_count_ok(OSSL_RECORD_LAYER *rl, size_t length, |
497 | size_t overhead, int send) | |
498 | { | |
499 | uint32_t max_early_data = rl->max_early_data; | |
500 | ||
501 | if (max_early_data == 0) { | |
502 | RLAYERfatal(rl, send ? SSL_AD_INTERNAL_ERROR : SSL_AD_UNEXPECTED_MESSAGE, | |
1704961c | 503 | SSL_R_TOO_MUCH_EARLY_DATA); |
9dd90232 MC |
504 | return 0; |
505 | } | |
506 | ||
507 | /* If we are dealing with ciphertext we need to allow for the overhead */ | |
508 | max_early_data += overhead; | |
509 | ||
510 | if (rl->early_data_count + length > max_early_data) { | |
511 | RLAYERfatal(rl, send ? SSL_AD_INTERNAL_ERROR : SSL_AD_UNEXPECTED_MESSAGE, | |
1704961c | 512 | SSL_R_TOO_MUCH_EARLY_DATA); |
9dd90232 MC |
513 | return 0; |
514 | } | |
515 | rl->early_data_count += length; | |
516 | ||
517 | return 1; | |
518 | } | |
519 | ||
4030869d MC |
520 | /* |
521 | * MAX_EMPTY_RECORDS defines the number of consecutive, empty records that | |
1704961c | 522 | * will be processed per call to tls_get_more_records. Without this limit an |
4030869d | 523 | * attacker could send empty records at a faster rate than we can process and |
1704961c | 524 | * cause tls_get_more_records to loop forever. |
4030869d MC |
525 | */ |
526 | #define MAX_EMPTY_RECORDS 32 | |
527 | ||
528 | #define SSL2_RT_HEADER_LENGTH 2 | |
529 | ||
530 | /*- | |
531 | * Call this to buffer new input records in rl->rrec. | |
532 | * It will return a OSSL_RECORD_RETURN_* value. | |
533 | * When it finishes successfully (OSSL_RECORD_RETURN_SUCCESS), |rl->num_recs| | |
534 | * records have been decoded. For each record 'i': | |
535 | * rrec[i].type - is the type of record | |
536 | * rrec[i].data, - data | |
537 | * rrec[i].length, - number of bytes | |
538 | * Multiple records will only be returned if the record types are all | |
539 | * SSL3_RT_APPLICATION_DATA. The number of records returned will always be <= | |
540 | * |max_pipelines| | |
541 | */ | |
eddb067e | 542 | int tls_get_more_records(OSSL_RECORD_LAYER *rl) |
4030869d MC |
543 | { |
544 | int enc_err, rret; | |
545 | int i; | |
546 | size_t more, n; | |
547 | SSL3_RECORD *rr, *thisrr; | |
548 | SSL3_BUFFER *rbuf; | |
4030869d MC |
549 | unsigned char *p; |
550 | unsigned char md[EVP_MAX_MD_SIZE]; | |
551 | unsigned int version; | |
552 | size_t mac_size = 0; | |
553 | int imac_size; | |
554 | size_t num_recs = 0, max_recs, j; | |
555 | PACKET pkt, sslv2pkt; | |
4030869d MC |
556 | SSL_MAC_BUF *macbufs = NULL; |
557 | int ret = OSSL_RECORD_RETURN_FATAL; | |
4030869d MC |
558 | |
559 | rr = rl->rrec; | |
560 | rbuf = &rl->rbuf; | |
cc110a0a | 561 | if (rbuf->buf == NULL) { |
9b7fb65e | 562 | if (!tls_setup_read_buffer(rl)) { |
cc110a0a MC |
563 | /* RLAYERfatal() already called */ |
564 | return OSSL_RECORD_RETURN_FATAL; | |
565 | } | |
566 | } | |
4030869d | 567 | |
8124ab56 MC |
568 | max_recs = rl->max_pipelines; |
569 | ||
4030869d MC |
570 | if (max_recs == 0) |
571 | max_recs = 1; | |
4030869d | 572 | |
4030869d MC |
573 | do { |
574 | thisrr = &rr[num_recs]; | |
575 | ||
576 | /* check if we have the header */ | |
577 | if ((rl->rstate != SSL_ST_READ_BODY) || | |
578 | (rl->packet_length < SSL3_RT_HEADER_LENGTH)) { | |
579 | size_t sslv2len; | |
580 | unsigned int type; | |
581 | ||
1853d20a MC |
582 | rret = rl->funcs->read_n(rl, SSL3_RT_HEADER_LENGTH, |
583 | SSL3_BUFFER_get_len(rbuf), 0, | |
584 | num_recs == 0 ? 1 : 0, &n); | |
585 | ||
586 | if (rret < OSSL_RECORD_RETURN_SUCCESS) | |
587 | return rret; /* error or non-blocking */ | |
588 | ||
4030869d MC |
589 | rl->rstate = SSL_ST_READ_BODY; |
590 | ||
591 | p = rl->packet; | |
592 | if (!PACKET_buf_init(&pkt, p, rl->packet_length)) { | |
593 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
594 | return OSSL_RECORD_RETURN_FATAL; | |
595 | } | |
596 | sslv2pkt = pkt; | |
597 | if (!PACKET_get_net_2_len(&sslv2pkt, &sslv2len) | |
598 | || !PACKET_get_1(&sslv2pkt, &type)) { | |
599 | RLAYERfatal(rl, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); | |
600 | return OSSL_RECORD_RETURN_FATAL; | |
601 | } | |
602 | /* | |
603 | * The first record received by the server may be a V2ClientHello. | |
604 | */ | |
605 | if (rl->role == OSSL_RECORD_ROLE_SERVER | |
606 | && rl->is_first_record | |
607 | && (sslv2len & 0x8000) != 0 | |
608 | && (type == SSL2_MT_CLIENT_HELLO)) { | |
609 | /* | |
610 | * SSLv2 style record | |
611 | * | |
612 | * |num_recs| here will actually always be 0 because | |
613 | * |num_recs > 0| only ever occurs when we are processing | |
614 | * multiple app data records - which we know isn't the case here | |
615 | * because it is an SSLv2ClientHello. We keep it using | |
616 | * |num_recs| for the sake of consistency | |
617 | */ | |
618 | thisrr->type = SSL3_RT_HANDSHAKE; | |
619 | thisrr->rec_version = SSL2_VERSION; | |
620 | ||
621 | thisrr->length = sslv2len & 0x7fff; | |
622 | ||
623 | if (thisrr->length > SSL3_BUFFER_get_len(rbuf) | |
1704961c | 624 | - SSL2_RT_HEADER_LENGTH) { |
4030869d MC |
625 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, |
626 | SSL_R_PACKET_LENGTH_TOO_LONG); | |
627 | return OSSL_RECORD_RETURN_FATAL; | |
628 | } | |
4030869d MC |
629 | } else { |
630 | /* SSLv3+ style record */ | |
631 | ||
632 | /* Pull apart the header into the SSL3_RECORD */ | |
633 | if (!PACKET_get_1(&pkt, &type) | |
634 | || !PACKET_get_net_2(&pkt, &version) | |
635 | || !PACKET_get_net_2_len(&pkt, &thisrr->length)) { | |
b85ebc4b MC |
636 | if (rl->msg_callback != NULL) |
637 | rl->msg_callback(0, 0, SSL3_RT_HEADER, p, 5, rl->cbarg); | |
4030869d MC |
638 | RLAYERfatal(rl, SSL_AD_DECODE_ERROR, ERR_R_INTERNAL_ERROR); |
639 | return OSSL_RECORD_RETURN_FATAL; | |
640 | } | |
641 | thisrr->type = type; | |
642 | thisrr->rec_version = version; | |
643 | ||
014baa8a MC |
644 | /* |
645 | * When we call validate_record_header() only records actually | |
646 | * received in SSLv2 format should have the record version set | |
647 | * to SSL2_VERSION. This way validate_record_header() can know | |
648 | * what format the record was in based on the version. | |
649 | */ | |
650 | if (thisrr->rec_version == SSL2_VERSION) { | |
651 | RLAYERfatal(rl, SSL_AD_PROTOCOL_VERSION, | |
652 | SSL_R_WRONG_VERSION_NUMBER); | |
653 | return OSSL_RECORD_RETURN_FATAL; | |
654 | } | |
655 | ||
b85ebc4b MC |
656 | if (rl->msg_callback != NULL) |
657 | rl->msg_callback(0, version, SSL3_RT_HEADER, p, 5, rl->cbarg); | |
4030869d | 658 | |
4030869d MC |
659 | if (thisrr->length > |
660 | SSL3_BUFFER_get_len(rbuf) - SSL3_RT_HEADER_LENGTH) { | |
661 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, | |
662 | SSL_R_PACKET_LENGTH_TOO_LONG); | |
663 | return OSSL_RECORD_RETURN_FATAL; | |
664 | } | |
665 | } | |
666 | ||
1853d20a MC |
667 | if (!rl->funcs->validate_record_header(rl, thisrr)) { |
668 | /* RLAYERfatal already called */ | |
4030869d MC |
669 | return OSSL_RECORD_RETURN_FATAL; |
670 | } | |
4030869d | 671 | |
1853d20a | 672 | /* now rl->rstate == SSL_ST_READ_BODY */ |
4030869d MC |
673 | } |
674 | ||
675 | /* | |
676 | * rl->rstate == SSL_ST_READ_BODY, get and decode the data. Calculate | |
677 | * how much more data we need to read for the rest of the record | |
678 | */ | |
679 | if (thisrr->rec_version == SSL2_VERSION) { | |
680 | more = thisrr->length + SSL2_RT_HEADER_LENGTH | |
1704961c | 681 | - SSL3_RT_HEADER_LENGTH; |
4030869d MC |
682 | } else { |
683 | more = thisrr->length; | |
684 | } | |
685 | ||
686 | if (more > 0) { | |
687 | /* now rl->packet_length == SSL3_RT_HEADER_LENGTH */ | |
688 | ||
1853d20a | 689 | rret = rl->funcs->read_n(rl, more, more, 1, 0, &n); |
4030869d MC |
690 | if (rret < OSSL_RECORD_RETURN_SUCCESS) |
691 | return rret; /* error or non-blocking io */ | |
692 | } | |
693 | ||
694 | /* set state for later operations */ | |
695 | rl->rstate = SSL_ST_READ_HEADER; | |
696 | ||
697 | /* | |
698 | * At this point, rl->packet_length == SSL3_RT_HEADER_LENGTH | |
699 | * + thisrr->length, or rl->packet_length == SSL2_RT_HEADER_LENGTH | |
700 | * + thisrr->length and we have that many bytes in rl->packet | |
701 | */ | |
702 | if (thisrr->rec_version == SSL2_VERSION) | |
703 | thisrr->input = &(rl->packet[SSL2_RT_HEADER_LENGTH]); | |
704 | else | |
705 | thisrr->input = &(rl->packet[SSL3_RT_HEADER_LENGTH]); | |
706 | ||
707 | /* | |
708 | * ok, we can now read from 'rl->packet' data into 'thisrr'. | |
709 | * thisrr->input points at thisrr->length bytes, which need to be copied | |
710 | * into thisrr->data by either the decryption or by the decompression. | |
711 | * When the data is 'copied' into the thisrr->data buffer, | |
712 | * thisrr->input will be updated to point at the new buffer | |
713 | */ | |
714 | ||
715 | /* | |
716 | * We now have - encrypted [ MAC [ compressed [ plain ] ] ] | |
717 | * thisrr->length bytes of encrypted compressed stuff. | |
718 | */ | |
719 | ||
720 | /* decrypt in place in 'thisrr->input' */ | |
721 | thisrr->data = thisrr->input; | |
722 | thisrr->orig_len = thisrr->length; | |
723 | ||
4030869d MC |
724 | num_recs++; |
725 | ||
726 | /* we have pulled in a full packet so zero things */ | |
81c9ebd9 | 727 | rl->packet_length = 0; |
4030869d MC |
728 | rl->is_first_record = 0; |
729 | } while (num_recs < max_recs | |
730 | && thisrr->type == SSL3_RT_APPLICATION_DATA | |
88d61680 | 731 | && RLAYER_USE_EXPLICIT_IV(rl) |
6366bdd9 MC |
732 | && rl->enc_ctx != NULL |
733 | && (EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(rl->enc_ctx)) | |
4030869d MC |
734 | & EVP_CIPH_FLAG_PIPELINE) != 0 |
735 | && tls_record_app_data_waiting(rl)); | |
736 | ||
737 | if (num_recs == 1 | |
738 | && thisrr->type == SSL3_RT_CHANGE_CIPHER_SPEC | |
9cd9e097 MC |
739 | /* The following can happen in tlsany_meth after HRR */ |
740 | && rl->version == TLS1_3_VERSION | |
1853d20a | 741 | && rl->is_first_handshake) { |
4030869d MC |
742 | /* |
743 | * CCS messages must be exactly 1 byte long, containing the value 0x01 | |
744 | */ | |
745 | if (thisrr->length != 1 || thisrr->data[0] != 0x01) { | |
746 | RLAYERfatal(rl, SSL_AD_ILLEGAL_PARAMETER, | |
747 | SSL_R_INVALID_CCS_MESSAGE); | |
748 | return OSSL_RECORD_RETURN_FATAL; | |
749 | } | |
750 | /* | |
751 | * CCS messages are ignored in TLSv1.3. We treat it like an empty | |
752 | * handshake record | |
753 | */ | |
754 | thisrr->type = SSL3_RT_HANDSHAKE; | |
aedbb71b | 755 | if (++(rl->empty_record_count) > MAX_EMPTY_RECORDS) { |
4030869d MC |
756 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, |
757 | SSL_R_UNEXPECTED_CCS_MESSAGE); | |
758 | return OSSL_RECORD_RETURN_FATAL; | |
759 | } | |
4030869d MC |
760 | rl->num_recs = 0; |
761 | rl->curr_rec = 0; | |
762 | rl->num_released = 0; | |
763 | ||
764 | return OSSL_RECORD_RETURN_SUCCESS; | |
765 | } | |
766 | ||
6366bdd9 MC |
767 | if (rl->md_ctx != NULL) { |
768 | const EVP_MD *tmpmd = EVP_MD_CTX_get0_md(rl->md_ctx); | |
4030869d MC |
769 | |
770 | if (tmpmd != NULL) { | |
771 | imac_size = EVP_MD_get_size(tmpmd); | |
772 | if (!ossl_assert(imac_size >= 0 && imac_size <= EVP_MAX_MD_SIZE)) { | |
1704961c MC |
773 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB); |
774 | return OSSL_RECORD_RETURN_FATAL; | |
4030869d MC |
775 | } |
776 | mac_size = (size_t)imac_size; | |
777 | } | |
778 | } | |
779 | ||
780 | /* | |
781 | * If in encrypt-then-mac mode calculate mac from encrypted record. All | |
782 | * the details below are public so no timing details can leak. | |
783 | */ | |
6366bdd9 | 784 | if (rl->use_etm && rl->md_ctx) { |
4030869d MC |
785 | unsigned char *mac; |
786 | ||
787 | for (j = 0; j < num_recs; j++) { | |
788 | thisrr = &rr[j]; | |
789 | ||
790 | if (thisrr->length < mac_size) { | |
791 | RLAYERfatal(rl, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_TOO_SHORT); | |
792 | return OSSL_RECORD_RETURN_FATAL; | |
793 | } | |
794 | thisrr->length -= mac_size; | |
795 | mac = thisrr->data + thisrr->length; | |
8124ab56 | 796 | i = rl->funcs->mac(rl, thisrr, md, 0 /* not send */); |
4030869d MC |
797 | if (i == 0 || CRYPTO_memcmp(md, mac, mac_size) != 0) { |
798 | RLAYERfatal(rl, SSL_AD_BAD_RECORD_MAC, | |
799 | SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); | |
800 | return OSSL_RECORD_RETURN_FATAL; | |
801 | } | |
802 | } | |
803 | /* | |
804 | * We've handled the mac now - there is no MAC inside the encrypted | |
805 | * record | |
806 | */ | |
807 | mac_size = 0; | |
808 | } | |
809 | ||
810 | if (mac_size > 0) { | |
811 | macbufs = OPENSSL_zalloc(sizeof(*macbufs) * num_recs); | |
812 | if (macbufs == NULL) { | |
813 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); | |
814 | return OSSL_RECORD_RETURN_FATAL; | |
815 | } | |
816 | } | |
817 | ||
8124ab56 | 818 | enc_err = rl->funcs->cipher(rl, rr, num_recs, 0, macbufs, mac_size); |
4030869d MC |
819 | |
820 | /*- | |
821 | * enc_err is: | |
822 | * 0: if the record is publicly invalid, or an internal error, or AEAD | |
823 | * decryption failed, or ETM decryption failed. | |
824 | * 1: Success or MTE decryption failed (MAC will be randomised) | |
825 | */ | |
826 | if (enc_err == 0) { | |
d3192c26 | 827 | if (rl->alert != SSL_AD_NO_ALERT) { |
651216dd | 828 | /* RLAYERfatal() already got called */ |
4030869d MC |
829 | goto end; |
830 | } | |
b85ebc4b MC |
831 | if (num_recs == 1 |
832 | && rl->skip_early_data != NULL | |
833 | && rl->skip_early_data(rl->cbarg)) { | |
4030869d MC |
834 | /* |
835 | * Valid early_data that we cannot decrypt will fail here. We treat | |
836 | * it like an empty record. | |
837 | */ | |
838 | ||
839 | thisrr = &rr[0]; | |
840 | ||
9dd90232 MC |
841 | if (!rlayer_early_data_count_ok(rl, thisrr->length, |
842 | EARLY_DATA_CIPHERTEXT_OVERHEAD, 0)) { | |
843 | /* RLAYERfatal() already called */ | |
4030869d MC |
844 | goto end; |
845 | } | |
846 | ||
847 | thisrr->length = 0; | |
4030869d MC |
848 | rl->num_recs = 0; |
849 | rl->curr_rec = 0; | |
850 | rl->num_released = 0; | |
0755722c MC |
851 | /* Reset the read sequence */ |
852 | memset(rl->sequence, 0, sizeof(rl->sequence)); | |
4030869d MC |
853 | ret = 1; |
854 | goto end; | |
855 | } | |
856 | RLAYERfatal(rl, SSL_AD_BAD_RECORD_MAC, | |
857 | SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); | |
858 | goto end; | |
859 | } | |
860 | OSSL_TRACE_BEGIN(TLS) { | |
861 | BIO_printf(trc_out, "dec %lu\n", (unsigned long)rr[0].length); | |
862 | BIO_dump_indent(trc_out, rr[0].data, rr[0].length, 4); | |
863 | } OSSL_TRACE_END(TLS); | |
864 | ||
865 | /* r->length is now the compressed data plus mac */ | |
6366bdd9 | 866 | if (rl->enc_ctx != NULL |
ffbd6e67 | 867 | && !rl->use_etm |
6366bdd9 MC |
868 | && EVP_MD_CTX_get0_md(rl->md_ctx) != NULL) { |
869 | /* rl->md_ctx != NULL => mac_size != -1 */ | |
4030869d MC |
870 | |
871 | for (j = 0; j < num_recs; j++) { | |
872 | SSL_MAC_BUF *thismb = &macbufs[j]; | |
1704961c | 873 | |
4030869d MC |
874 | thisrr = &rr[j]; |
875 | ||
8124ab56 | 876 | i = rl->funcs->mac(rl, thisrr, md, 0 /* not send */); |
4030869d MC |
877 | if (i == 0 || thismb == NULL || thismb->mac == NULL |
878 | || CRYPTO_memcmp(md, thismb->mac, (size_t)mac_size) != 0) | |
879 | enc_err = 0; | |
880 | if (thisrr->length > SSL3_RT_MAX_COMPRESSED_LENGTH + mac_size) | |
881 | enc_err = 0; | |
882 | } | |
883 | } | |
884 | ||
885 | if (enc_err == 0) { | |
d3192c26 | 886 | if (rl->alert != SSL_AD_NO_ALERT) { |
651216dd | 887 | /* We already called RLAYERfatal() */ |
4030869d MC |
888 | goto end; |
889 | } | |
890 | /* | |
891 | * A separate 'decryption_failed' alert was introduced with TLS 1.0, | |
892 | * SSL 3.0 only has 'bad_record_mac'. But unless a decryption | |
893 | * failure is directly visible from the ciphertext anyway, we should | |
894 | * not reveal which kind of error occurred -- this might become | |
895 | * visible to an attacker (e.g. via a logfile) | |
896 | */ | |
897 | RLAYERfatal(rl, SSL_AD_BAD_RECORD_MAC, | |
898 | SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); | |
899 | goto end; | |
900 | } | |
901 | ||
4030869d MC |
902 | for (j = 0; j < num_recs; j++) { |
903 | thisrr = &rr[j]; | |
904 | ||
8124ab56 | 905 | if (!rl->funcs->post_process_record(rl, thisrr)) { |
1853d20a | 906 | /* RLAYERfatal already called */ |
4030869d MC |
907 | goto end; |
908 | } | |
909 | ||
910 | /* | |
911 | * Check if the received packet overflows the current | |
912 | * Max Fragment Length setting. | |
ffbd6e67 | 913 | * Note: rl->max_frag_len > 0 and KTLS are mutually exclusive. |
4030869d | 914 | */ |
ffbd6e67 | 915 | if (rl->max_frag_len > 0 && thisrr->length > rl->max_frag_len) { |
4030869d MC |
916 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, SSL_R_DATA_LENGTH_TOO_LONG); |
917 | goto end; | |
918 | } | |
919 | ||
920 | thisrr->off = 0; | |
921 | /*- | |
922 | * So at this point the following is true | |
923 | * thisrr->type is the type of record | |
924 | * thisrr->length == number of bytes in record | |
925 | * thisrr->off == offset to first valid byte | |
926 | * thisrr->data == where to take bytes from, increment after use :-). | |
927 | */ | |
928 | ||
929 | /* just read a 0 length packet */ | |
930 | if (thisrr->length == 0) { | |
aedbb71b | 931 | if (++(rl->empty_record_count) > MAX_EMPTY_RECORDS) { |
1704961c MC |
932 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, |
933 | SSL_R_RECORD_TOO_SMALL); | |
4030869d MC |
934 | goto end; |
935 | } | |
936 | } else { | |
aedbb71b | 937 | rl->empty_record_count = 0; |
4030869d MC |
938 | } |
939 | } | |
940 | ||
9dd90232 | 941 | if (rl->level == OSSL_RECORD_PROTECTION_LEVEL_EARLY) { |
4030869d MC |
942 | thisrr = &rr[0]; |
943 | if (thisrr->type == SSL3_RT_APPLICATION_DATA | |
9dd90232 MC |
944 | && !rlayer_early_data_count_ok(rl, thisrr->length, 0, 0)) { |
945 | /* RLAYERfatal already called */ | |
4030869d MC |
946 | goto end; |
947 | } | |
948 | } | |
949 | ||
950 | rl->num_recs = num_recs; | |
951 | rl->curr_rec = 0; | |
952 | rl->num_released = 0; | |
953 | ret = OSSL_RECORD_RETURN_SUCCESS; | |
954 | end: | |
955 | if (macbufs != NULL) { | |
956 | for (j = 0; j < num_recs; j++) { | |
957 | if (macbufs[j].alloced) | |
958 | OPENSSL_free(macbufs[j].mac); | |
959 | } | |
960 | OPENSSL_free(macbufs); | |
961 | } | |
962 | return ret; | |
963 | } | |
964 | ||
1853d20a MC |
965 | /* Shared by ssl3_meth and tls1_meth */ |
966 | int tls_default_validate_record_header(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) | |
967 | { | |
968 | size_t len = SSL3_RT_MAX_ENCRYPTED_LENGTH; | |
969 | ||
970 | if (rec->rec_version != rl->version) { | |
971 | RLAYERfatal(rl, SSL_AD_PROTOCOL_VERSION, SSL_R_WRONG_VERSION_NUMBER); | |
972 | return 0; | |
973 | } | |
974 | ||
975 | #ifndef OPENSSL_NO_COMP | |
976 | /* | |
1704961c MC |
977 | * If OPENSSL_NO_COMP is defined then SSL3_RT_MAX_ENCRYPTED_LENGTH |
978 | * does not include the compression overhead anyway. | |
979 | */ | |
1853d20a MC |
980 | if (rl->expand == NULL) |
981 | len -= SSL3_RT_MAX_COMPRESSED_OVERHEAD; | |
982 | #endif | |
983 | ||
984 | if (rec->length > len) { | |
985 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, | |
986 | SSL_R_ENCRYPTED_LENGTH_TOO_LONG); | |
987 | return 0; | |
988 | } | |
989 | ||
990 | return 1; | |
991 | } | |
992 | ||
222cf410 | 993 | int tls_do_uncompress(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) |
1853d20a MC |
994 | { |
995 | #ifndef OPENSSL_NO_COMP | |
996 | int i; | |
997 | ||
998 | if (rec->comp == NULL) { | |
999 | rec->comp = (unsigned char *) | |
1000 | OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); | |
1001 | } | |
1002 | if (rec->comp == NULL) | |
1003 | return 0; | |
1004 | ||
1704961c MC |
1005 | i = COMP_expand_block(rl->expand, rec->comp, SSL3_RT_MAX_PLAIN_LENGTH, |
1006 | rec->data, (int)rec->length); | |
1853d20a MC |
1007 | if (i < 0) |
1008 | return 0; | |
1009 | else | |
1010 | rec->length = i; | |
1011 | rec->data = rec->comp; | |
1012 | return 1; | |
1013 | #else | |
1014 | return 0; | |
1015 | #endif | |
1016 | } | |
1017 | ||
1018 | /* Shared by tlsany_meth, ssl3_meth and tls1_meth */ | |
8124ab56 | 1019 | int tls_default_post_process_record(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) |
1853d20a MC |
1020 | { |
1021 | if (rl->expand != NULL) { | |
1022 | if (rec->length > SSL3_RT_MAX_COMPRESSED_LENGTH) { | |
1023 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, | |
1024 | SSL_R_COMPRESSED_LENGTH_TOO_LONG); | |
1025 | return 0; | |
1026 | } | |
1027 | if (!tls_do_uncompress(rl, rec)) { | |
1028 | RLAYERfatal(rl, SSL_AD_DECOMPRESSION_FAILURE, | |
1029 | SSL_R_BAD_DECOMPRESSION); | |
1030 | return 0; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | if (rec->length > SSL3_RT_MAX_PLAIN_LENGTH) { | |
1035 | RLAYERfatal(rl, SSL_AD_RECORD_OVERFLOW, SSL_R_DATA_LENGTH_TOO_LONG); | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | return 1; | |
1040 | } | |
1041 | ||
1042 | /* Shared by tls13_meth and ktls_meth */ | |
8124ab56 | 1043 | int tls13_common_post_process_record(OSSL_RECORD_LAYER *rl, SSL3_RECORD *rec) |
1853d20a | 1044 | { |
1853d20a MC |
1045 | if (rec->type != SSL3_RT_APPLICATION_DATA |
1046 | && rec->type != SSL3_RT_ALERT | |
1047 | && rec->type != SSL3_RT_HANDSHAKE) { | |
1048 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_BAD_RECORD_TYPE); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
b85ebc4b MC |
1052 | if (rl->msg_callback != NULL) |
1053 | rl->msg_callback(0, rl->version, SSL3_RT_INNER_CONTENT_TYPE, &rec->type, | |
1054 | 1, rl->cbarg); | |
1853d20a MC |
1055 | |
1056 | /* | |
1057 | * TLSv1.3 alert and handshake records are required to be non-zero in | |
1058 | * length. | |
1059 | */ | |
1704961c | 1060 | if ((rec->type == SSL3_RT_HANDSHAKE || rec->type == SSL3_RT_ALERT) |
1853d20a MC |
1061 | && rec->length == 0) { |
1062 | RLAYERfatal(rl, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_BAD_LENGTH); | |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | return 1; | |
1067 | } | |
1068 | ||
1704961c | 1069 | int tls_read_record(OSSL_RECORD_LAYER *rl, void **rechandle, int *rversion, |
1853d20a | 1070 | int *type, unsigned char **data, size_t *datalen, |
8124ab56 | 1071 | uint16_t *epoch, unsigned char *seq_num) |
4030869d MC |
1072 | { |
1073 | SSL3_RECORD *rec; | |
1074 | ||
1075 | /* | |
1076 | * tls_get_more_records() can return success without actually reading | |
1077 | * anything useful (i.e. if empty records are read). We loop here until | |
1078 | * we have something useful. tls_get_more_records() will eventually fail if | |
1079 | * too many sequential empty records are read. | |
1080 | */ | |
1081 | while (rl->curr_rec >= rl->num_recs) { | |
1082 | int ret; | |
1083 | ||
1084 | if (rl->num_released != rl->num_recs) { | |
1085 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_RECORDS_NOT_RELEASED); | |
1086 | return OSSL_RECORD_RETURN_FATAL; | |
1087 | } | |
1088 | ||
eddb067e | 1089 | ret = rl->funcs->get_more_records(rl); |
4030869d MC |
1090 | |
1091 | if (ret != OSSL_RECORD_RETURN_SUCCESS) | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | /* | |
1096 | * We have now got rl->num_recs records buffered in rl->rrec. rl->curr_rec | |
1097 | * points to the next one to read. | |
1098 | */ | |
1099 | rec = &rl->rrec[rl->curr_rec++]; | |
1100 | ||
1101 | *rechandle = rec; | |
1102 | *rversion = rec->rec_version; | |
1103 | *type = rec->type; | |
eddb067e | 1104 | *data = rec->data + rec->off; |
4030869d | 1105 | *datalen = rec->length; |
eddb067e | 1106 | if (rl->isdtls) { |
279754d4 | 1107 | *epoch = rec->epoch; |
eddb067e MC |
1108 | memcpy(seq_num, rec->seq_num, sizeof(rec->seq_num)); |
1109 | } | |
4030869d MC |
1110 | |
1111 | return OSSL_RECORD_RETURN_SUCCESS; | |
1112 | } | |
1113 | ||
1853d20a | 1114 | int tls_release_record(OSSL_RECORD_LAYER *rl, void *rechandle) |
4030869d MC |
1115 | { |
1116 | if (!ossl_assert(rl->num_released < rl->curr_rec) | |
1117 | || !ossl_assert(rechandle == &rl->rrec[rl->num_released])) { | |
1118 | /* Should not happen */ | |
1119 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_INVALID_RECORD); | |
1120 | return OSSL_RECORD_RETURN_FATAL; | |
1121 | } | |
1122 | ||
1123 | rl->num_released++; | |
1124 | ||
3de76959 MC |
1125 | if (rl->curr_rec == rl->num_released |
1126 | && (rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0 | |
1127 | && SSL3_BUFFER_get_left(&rl->rbuf) == 0) | |
9b7fb65e | 1128 | tls_release_read_buffer(rl); |
3de76959 | 1129 | |
4030869d MC |
1130 | return OSSL_RECORD_RETURN_SUCCESS; |
1131 | } | |
1132 | ||
4566dae7 MC |
1133 | int tls_set_options(OSSL_RECORD_LAYER *rl, const OSSL_PARAM *options) |
1134 | { | |
1135 | const OSSL_PARAM *p; | |
1136 | ||
1137 | p = OSSL_PARAM_locate_const(options, OSSL_LIBSSL_RECORD_LAYER_PARAM_OPTIONS); | |
1138 | if (p != NULL && !OSSL_PARAM_get_uint64(p, &rl->options)) { | |
1139 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | p = OSSL_PARAM_locate_const(options, OSSL_LIBSSL_RECORD_LAYER_PARAM_MODE); | |
1144 | if (p != NULL && !OSSL_PARAM_get_uint32(p, &rl->mode)) { | |
1145 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1146 | return 0; | |
1147 | } | |
1148 | ||
eb7d6c2a MC |
1149 | if (rl->direction == OSSL_RECORD_DIRECTION_READ) { |
1150 | p = OSSL_PARAM_locate_const(options, | |
1151 | OSSL_LIBSSL_RECORD_LAYER_READ_BUFFER_LEN); | |
1152 | if (p != NULL && !OSSL_PARAM_get_size_t(p, &rl->rbuf.default_len)) { | |
1153 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1154 | return 0; | |
1155 | } | |
1156 | } else { | |
1157 | p = OSSL_PARAM_locate_const(options, | |
1158 | OSSL_LIBSSL_RECORD_LAYER_PARAM_BLOCK_PADDING); | |
1159 | if (p != NULL && !OSSL_PARAM_get_size_t(p, &rl->block_padding)) { | |
1160 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1161 | return 0; | |
1162 | } | |
4566dae7 MC |
1163 | } |
1164 | ||
1165 | if (rl->level == OSSL_RECORD_PROTECTION_LEVEL_APPLICATION) { | |
1166 | /* | |
1167 | * We ignore any read_ahead setting prior to the application protection | |
1168 | * level. Otherwise we may read ahead data in a lower protection level | |
1169 | * that is destined for a higher protection level. To simplify the logic | |
1170 | * we don't support that at this stage. | |
1171 | */ | |
1172 | p = OSSL_PARAM_locate_const(options, | |
1173 | OSSL_LIBSSL_RECORD_LAYER_PARAM_READ_AHEAD); | |
1174 | if (p != NULL && !OSSL_PARAM_get_int(p, &rl->read_ahead)) { | |
1175 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); | |
1176 | return 0; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | return 1; | |
1181 | } | |
1182 | ||
1853d20a | 1183 | int |
cc110a0a MC |
1184 | tls_int_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers, |
1185 | int role, int direction, int level, unsigned char *key, | |
1186 | size_t keylen, unsigned char *iv, size_t ivlen, | |
1187 | unsigned char *mackey, size_t mackeylen, | |
1188 | const EVP_CIPHER *ciph, size_t taglen, | |
cc110a0a | 1189 | int mactype, |
359affde MC |
1190 | const EVP_MD *md, const SSL_COMP *comp, BIO *prev, |
1191 | BIO *transport, BIO *next, BIO_ADDR *local, | |
1192 | BIO_ADDR *peer, const OSSL_PARAM *settings, | |
9dd90232 MC |
1193 | const OSSL_PARAM *options, |
1194 | const OSSL_DISPATCH *fns, void *cbarg, | |
8124ab56 | 1195 | OSSL_RECORD_LAYER **retrl) |
34a4068c MC |
1196 | { |
1197 | OSSL_RECORD_LAYER *rl = OPENSSL_zalloc(sizeof(*rl)); | |
e2d5742b MC |
1198 | const OSSL_PARAM *p; |
1199 | ||
7c293999 MC |
1200 | *retrl = NULL; |
1201 | ||
e2d5742b | 1202 | if (rl == NULL) { |
7b7ad9e5 | 1203 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
7c293999 | 1204 | return OSSL_RECORD_RETURN_FATAL; |
e2d5742b MC |
1205 | } |
1206 | ||
7f2f0ac7 | 1207 | /* Loop through all the settings since they must all be understood */ |
a16f9d33 MC |
1208 | if (settings != NULL) { |
1209 | for (p = settings; p->key != NULL; p++) { | |
1210 | if (strcmp(p->key, OSSL_LIBSSL_RECORD_LAYER_PARAM_USE_ETM) == 0) { | |
1211 | if (!OSSL_PARAM_get_int(p, &rl->use_etm)) { | |
7b7ad9e5 | 1212 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1213 | goto err; |
1214 | } | |
1215 | } else if (strcmp(p->key, | |
1216 | OSSL_LIBSSL_RECORD_LAYER_PARAM_MAX_FRAG_LEN) == 0) { | |
1217 | if (!OSSL_PARAM_get_uint(p, &rl->max_frag_len)) { | |
7b7ad9e5 | 1218 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1219 | goto err; |
1220 | } | |
1221 | } else if (strcmp(p->key, | |
1222 | OSSL_LIBSSL_RECORD_LAYER_PARAM_MAX_EARLY_DATA) == 0) { | |
1223 | if (!OSSL_PARAM_get_uint32(p, &rl->max_early_data)) { | |
7b7ad9e5 | 1224 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1225 | goto err; |
1226 | } | |
1227 | } else if (strcmp(p->key, | |
1228 | OSSL_LIBSSL_RECORD_LAYER_PARAM_STREAM_MAC) == 0) { | |
1229 | if (!OSSL_PARAM_get_int(p, &rl->stream_mac)) { | |
7b7ad9e5 | 1230 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1231 | goto err; |
1232 | } | |
1704961c MC |
1233 | } else if (strcmp(p->key, |
1234 | OSSL_LIBSSL_RECORD_LAYER_PARAM_TLSTREE) == 0) { | |
a16f9d33 | 1235 | if (!OSSL_PARAM_get_int(p, &rl->tlstree)) { |
7b7ad9e5 | 1236 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
a16f9d33 MC |
1237 | goto err; |
1238 | } | |
1239 | } else { | |
7b7ad9e5 | 1240 | ERR_raise(ERR_LIB_SSL, SSL_R_UNKNOWN_MANDATORY_PARAMETER); |
8124ab56 MC |
1241 | goto err; |
1242 | } | |
7f2f0ac7 MC |
1243 | } |
1244 | } | |
1245 | ||
aedbb71b MC |
1246 | rl->libctx = libctx; |
1247 | rl->propq = propq; | |
1248 | ||
e2d5742b MC |
1249 | rl->version = vers; |
1250 | rl->role = role; | |
1251 | rl->direction = direction; | |
9dd90232 | 1252 | rl->level = level; |
4030869d | 1253 | |
d3192c26 MC |
1254 | rl->alert = SSL_AD_NO_ALERT; |
1255 | ||
1853d20a | 1256 | if (level == OSSL_RECORD_PROTECTION_LEVEL_NONE) |
4030869d MC |
1257 | rl->is_first_record = 1; |
1258 | ||
e2d5742b MC |
1259 | if (!tls_set1_bio(rl, transport)) |
1260 | goto err; | |
1261 | ||
359affde MC |
1262 | if (prev != NULL && !BIO_up_ref(prev)) |
1263 | goto err; | |
1264 | rl->prev = prev; | |
1265 | ||
1266 | if (next != NULL && !BIO_up_ref(next)) | |
1267 | goto err; | |
1268 | rl->next = next; | |
1269 | ||
9dd90232 | 1270 | rl->cbarg = cbarg; |
a16f9d33 MC |
1271 | if (fns != NULL) { |
1272 | for (; fns->function_id != 0; fns++) { | |
1273 | switch (fns->function_id) { | |
1274 | case OSSL_FUNC_RLAYER_SKIP_EARLY_DATA: | |
1275 | rl->skip_early_data = OSSL_FUNC_rlayer_skip_early_data(fns); | |
1276 | break; | |
1277 | case OSSL_FUNC_RLAYER_MSG_CALLBACK: | |
1278 | rl->msg_callback = OSSL_FUNC_rlayer_msg_callback(fns); | |
1279 | break; | |
1280 | case OSSL_FUNC_RLAYER_SECURITY: | |
1281 | rl->security = OSSL_FUNC_rlayer_security(fns); | |
1282 | break; | |
5f95eb77 MC |
1283 | case OSSL_FUNC_RLAYER_PADDING: |
1284 | rl->padding = OSSL_FUNC_rlayer_padding(fns); | |
a16f9d33 MC |
1285 | default: |
1286 | /* Just ignore anything we don't understand */ | |
1287 | break; | |
1288 | } | |
9dd90232 MC |
1289 | } |
1290 | } | |
1291 | ||
4566dae7 | 1292 | if (!tls_set_options(rl, options)) { |
7b7ad9e5 | 1293 | ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_GET_PARAMETER); |
4566dae7 MC |
1294 | goto err; |
1295 | } | |
1296 | ||
b9e4e783 MC |
1297 | if ((rl->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) == 0 |
1298 | && rl->version <= TLS1_VERSION | |
1299 | && !EVP_CIPHER_is_a(ciph, "NULL") | |
1300 | && !EVP_CIPHER_is_a(ciph, "RC4")) { | |
1301 | /* | |
1302 | * Enable vulnerability countermeasure for CBC ciphers with known-IV | |
1303 | * problem (http://www.openssl.org/~bodo/tls-cbc.txt) | |
1304 | */ | |
1305 | rl->need_empty_fragments = 1; | |
1306 | } | |
1307 | ||
7c293999 MC |
1308 | *retrl = rl; |
1309 | return OSSL_RECORD_RETURN_SUCCESS; | |
cc110a0a | 1310 | err: |
359affde | 1311 | tls_int_free(rl); |
7c293999 | 1312 | return OSSL_RECORD_RETURN_FATAL; |
cc110a0a MC |
1313 | } |
1314 | ||
7c293999 | 1315 | static int |
cc110a0a | 1316 | tls_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers, |
279754d4 | 1317 | int role, int direction, int level, uint16_t epoch, |
222cf410 MC |
1318 | unsigned char *key, size_t keylen, unsigned char *iv, |
1319 | size_t ivlen, unsigned char *mackey, size_t mackeylen, | |
cc110a0a | 1320 | const EVP_CIPHER *ciph, size_t taglen, |
cc110a0a | 1321 | int mactype, |
1704961c | 1322 | const EVP_MD *md, const SSL_COMP *comp, BIO *prev, |
359affde | 1323 | BIO *transport, BIO *next, BIO_ADDR *local, BIO_ADDR *peer, |
cc110a0a | 1324 | const OSSL_PARAM *settings, const OSSL_PARAM *options, |
9dd90232 | 1325 | const OSSL_DISPATCH *fns, void *cbarg, |
8124ab56 | 1326 | OSSL_RECORD_LAYER **retrl) |
cc110a0a | 1327 | { |
7c293999 | 1328 | int ret; |
1704961c | 1329 | |
7c293999 MC |
1330 | ret = tls_int_new_record_layer(libctx, propq, vers, role, direction, level, |
1331 | key, keylen, iv, ivlen, mackey, mackeylen, | |
359affde MC |
1332 | ciph, taglen, mactype, md, comp, prev, |
1333 | transport, next, local, peer, settings, | |
8124ab56 | 1334 | options, fns, cbarg, retrl); |
cc110a0a | 1335 | |
7c293999 MC |
1336 | if (ret != OSSL_RECORD_RETURN_SUCCESS) |
1337 | return ret; | |
cc110a0a | 1338 | |
aedbb71b MC |
1339 | switch (vers) { |
1340 | case TLS_ANY_VERSION: | |
7c293999 | 1341 | (*retrl)->funcs = &tls_any_funcs; |
aedbb71b MC |
1342 | break; |
1343 | case TLS1_3_VERSION: | |
7c293999 | 1344 | (*retrl)->funcs = &tls_1_3_funcs; |
aedbb71b MC |
1345 | break; |
1346 | case TLS1_2_VERSION: | |
aedbb71b | 1347 | case TLS1_1_VERSION: |
aedbb71b | 1348 | case TLS1_VERSION: |
7c293999 | 1349 | (*retrl)->funcs = &tls_1_funcs; |
aedbb71b MC |
1350 | break; |
1351 | case SSL3_VERSION: | |
7c293999 | 1352 | (*retrl)->funcs = &ssl_3_0_funcs; |
aedbb71b MC |
1353 | break; |
1354 | default: | |
1355 | /* Should not happen */ | |
7c293999 MC |
1356 | ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR); |
1357 | ret = OSSL_RECORD_RETURN_FATAL; | |
aedbb71b MC |
1358 | goto err; |
1359 | } | |
1360 | ||
7c293999 | 1361 | ret = (*retrl)->funcs->set_crypto_state(*retrl, level, key, keylen, iv, |
1704961c MC |
1362 | ivlen, mackey, mackeylen, ciph, |
1363 | taglen, mactype, md, comp); | |
aedbb71b | 1364 | |
e2d5742b | 1365 | err: |
7c293999 MC |
1366 | if (ret != OSSL_RECORD_RETURN_SUCCESS) { |
1367 | OPENSSL_free(*retrl); | |
1368 | *retrl = NULL; | |
1369 | } | |
1370 | return ret; | |
e2d5742b MC |
1371 | } |
1372 | ||
359affde | 1373 | static void tls_int_free(OSSL_RECORD_LAYER *rl) |
34a4068c | 1374 | { |
359affde | 1375 | BIO_free(rl->prev); |
e2d5742b | 1376 | BIO_free(rl->bio); |
359affde MC |
1377 | BIO_free(rl->next); |
1378 | SSL3_BUFFER_release(&rl->rbuf); | |
1379 | ||
151f313e MC |
1380 | tls_release_write_buffer(rl); |
1381 | ||
6366bdd9 MC |
1382 | EVP_CIPHER_CTX_free(rl->enc_ctx); |
1383 | EVP_MD_CTX_free(rl->md_ctx); | |
976b263d | 1384 | #ifndef OPENSSL_NO_COMP |
359affde | 1385 | COMP_CTX_free(rl->expand); |
976b263d | 1386 | #endif |
359affde | 1387 | |
c77d4556 MC |
1388 | if (rl->version == SSL3_VERSION) |
1389 | OPENSSL_cleanse(rl->mac_secret, sizeof(rl->mac_secret)); | |
1390 | ||
6b5c7ef7 JC |
1391 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
1392 | ||
34a4068c MC |
1393 | OPENSSL_free(rl); |
1394 | } | |
1395 | ||
359affde MC |
1396 | int tls_free(OSSL_RECORD_LAYER *rl) |
1397 | { | |
1398 | SSL3_BUFFER *rbuf; | |
1399 | size_t left, written; | |
1400 | int ret = 1; | |
1401 | ||
1402 | rbuf = &rl->rbuf; | |
1403 | ||
1404 | left = SSL3_BUFFER_get_left(rbuf); | |
1405 | if (left > 0) { | |
1406 | /* | |
1407 | * This record layer is closing but we still have data left in our | |
1408 | * buffer. It must be destined for the next epoch - so push it there. | |
1409 | */ | |
1410 | ret = BIO_write_ex(rl->next, rbuf->buf + rbuf->offset, left, &written); | |
1411 | } | |
1412 | tls_int_free(rl); | |
1413 | ||
1414 | return ret; | |
1415 | } | |
1416 | ||
1853d20a | 1417 | int tls_reset(OSSL_RECORD_LAYER *rl) |
34a4068c MC |
1418 | { |
1419 | memset(rl, 0, sizeof(*rl)); | |
1420 | return 1; | |
1421 | } | |
1422 | ||
1853d20a | 1423 | int tls_unprocessed_read_pending(OSSL_RECORD_LAYER *rl) |
34a4068c | 1424 | { |
0755722c | 1425 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; |
34a4068c MC |
1426 | } |
1427 | ||
1853d20a | 1428 | int tls_processed_read_pending(OSSL_RECORD_LAYER *rl) |
34a4068c | 1429 | { |
4030869d | 1430 | return rl->curr_rec < rl->num_recs; |
34a4068c MC |
1431 | } |
1432 | ||
1853d20a | 1433 | size_t tls_app_data_pending(OSSL_RECORD_LAYER *rl) |
34a4068c | 1434 | { |
8bbf7ef6 MC |
1435 | size_t i; |
1436 | size_t num = 0; | |
1437 | ||
1704961c | 1438 | for (i = rl->curr_rec; i < rl->num_recs; i++) { |
8bbf7ef6 MC |
1439 | if (rl->rrec[i].type != SSL3_RT_APPLICATION_DATA) |
1440 | return num; | |
1441 | num += rl->rrec[i].length; | |
1442 | } | |
1443 | return num; | |
34a4068c MC |
1444 | } |
1445 | ||
1853d20a | 1446 | int tls_write_pending(OSSL_RECORD_LAYER *rl) |
34a4068c MC |
1447 | { |
1448 | return 0; | |
1449 | } | |
1450 | ||
1853d20a | 1451 | size_t tls_get_max_record_len(OSSL_RECORD_LAYER *rl) |
34a4068c MC |
1452 | { |
1453 | return 0; | |
1454 | } | |
1455 | ||
23bf52a4 MC |
1456 | static int tls_is_multiblock_capable(OSSL_RECORD_LAYER *rl, int type, |
1457 | size_t len, size_t fraglen) | |
1458 | { | |
1459 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK | |
1460 | /* TODO(RECLAYER): REMOVE ME */ | |
1461 | SSL_CONNECTION *s = rl->cbarg; | |
1462 | ||
1463 | if (type == SSL3_RT_APPLICATION_DATA | |
1464 | && len >= 4 * fraglen | |
1465 | && s->compress == NULL | |
1466 | && rl->msg_callback == NULL | |
1467 | && !rl->use_etm | |
1468 | && RLAYER_USE_EXPLICIT_IV(rl) | |
1469 | && !BIO_get_ktls_send(s->wbio) | |
1470 | && (EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(s->enc_write_ctx)) | |
1471 | & EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) != 0) | |
1472 | return 1; | |
1473 | #endif | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | size_t tls_get_max_records(OSSL_RECORD_LAYER *rl, int type, size_t len, | |
02719d5c | 1478 | size_t maxfrag, size_t *preffrag) |
34a4068c | 1479 | { |
c6186792 MC |
1480 | /* TODO(RECLAYER): Remove me */ |
1481 | SSL_CONNECTION *s = rl->cbarg; | |
1482 | ||
23bf52a4 MC |
1483 | if (tls_is_multiblock_capable(rl, type, len, *preffrag)) { |
1484 | /* minimize address aliasing conflicts */ | |
1485 | if ((*preffrag & 0xfff) == 0) | |
1486 | *preffrag -= 512; | |
1487 | ||
1488 | if (len >= 8 * (*preffrag)) | |
1489 | return 8; | |
1490 | ||
1491 | return 4; | |
1492 | } | |
c6186792 MC |
1493 | |
1494 | /* | |
1495 | * TODO(RECLYAER): There is no test for the pipelining code. We should add | |
1496 | * one. | |
1497 | */ | |
1498 | /* | |
1499 | * If we have a pipeline capable cipher, and we have been configured to use | |
1500 | * it, then return the preferred number of pipelines. | |
1501 | */ | |
1502 | if (rl->max_pipelines > 0 | |
1503 | && s->enc_write_ctx != NULL | |
1504 | && (EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(s->enc_write_ctx)) | |
1505 | & EVP_CIPH_FLAG_PIPELINE) != 0 | |
1506 | && RLAYER_USE_EXPLICIT_IV(rl)) { | |
1507 | size_t pipes; | |
1508 | ||
1509 | if (len == 0) | |
1510 | return 1; | |
1511 | pipes = ((len - 1) / *preffrag) + 1; | |
1512 | ||
1513 | return (pipes < rl->max_pipelines) ? pipes : rl->max_pipelines; | |
1514 | } | |
1515 | ||
02719d5c | 1516 | return 1; |
34a4068c MC |
1517 | } |
1518 | ||
23bf52a4 MC |
1519 | static int tls_write_records_multiblock(OSSL_RECORD_LAYER *rl, |
1520 | OSSL_RECORD_TEMPLATE *templates, | |
1521 | size_t numtempl) | |
1522 | { | |
1523 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK | |
1524 | size_t i; | |
1525 | size_t totlen; | |
1526 | SSL3_BUFFER *wb; | |
1527 | /* TODO(RECLAYER): Remove me */ | |
1528 | SSL_CONNECTION *s = rl->cbarg; | |
1529 | ||
1530 | if (numtempl != 4 && numtempl != 8) | |
1531 | return 0; | |
1532 | ||
1533 | /* | |
1534 | * Check templates have contiguous buffers and are all the same type and | |
1535 | * length | |
1536 | */ | |
1537 | for (i = 1; i < numtempl; i++) { | |
1538 | if (templates[i - 1].type != templates[i].type | |
1539 | || templates[i - 1].buflen != templates[i].buflen | |
1540 | || templates[i - 1].buf + templates[i - 1].buflen | |
1541 | != templates[i].buf) | |
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | totlen = templates[0].buflen * numtempl; | |
1546 | if (!tls_is_multiblock_capable(rl, templates[0].type, totlen, | |
1547 | templates[0].buflen)) | |
1548 | return 0; | |
1549 | ||
1550 | /* | |
1551 | * If we get this far, then multiblock is suitable | |
1552 | * Depending on platform multi-block can deliver several *times* | |
1553 | * better performance. Downside is that it has to allocate | |
1554 | * jumbo buffer to accommodate up to 8 records, but the | |
1555 | * compromise is considered worthy. | |
1556 | */ | |
1557 | ||
1558 | unsigned char aad[13]; | |
1559 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
1560 | size_t packlen; | |
1561 | int packleni; | |
1562 | ||
1563 | /* | |
1564 | * Allocate jumbo buffer. This will get freed next time we do a non | |
1565 | * multiblock write in the call to tls_setup_write_buffer() - the different | |
1566 | * buffer sizes will be spotted and the buffer reallocated. | |
1567 | */ | |
1568 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
1569 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
1570 | (int)templates[0].buflen, NULL); | |
1571 | packlen *= numtempl; | |
85b358b0 | 1572 | if (!tls_setup_write_buffer(rl, 1, packlen, packlen)) { |
23bf52a4 MC |
1573 | /* RLAYERfatal() already called */ |
1574 | return -1; | |
1575 | } | |
1576 | wb = &rl->wbuf[0]; | |
1577 | ||
1578 | mb_param.interleave = numtempl; | |
1579 | memcpy(aad, s->rlayer.write_sequence, 8); | |
1580 | aad[8] = templates[0].type; | |
1581 | aad[9] = (unsigned char)(templates[0].version >> 8); | |
1582 | aad[10] = (unsigned char)(templates[0].version); | |
1583 | aad[11] = 0; | |
1584 | aad[12] = 0; | |
1585 | mb_param.out = NULL; | |
1586 | mb_param.inp = aad; | |
1587 | mb_param.len = totlen; | |
1588 | ||
1589 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
1590 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, | |
1591 | sizeof(mb_param), &mb_param); | |
1592 | packlen = (size_t)packleni; | |
1593 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
1594 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1595 | return -1; | |
1596 | } | |
1597 | ||
1598 | mb_param.out = wb->buf; | |
1599 | mb_param.inp = templates[0].buf; | |
1600 | mb_param.len = totlen; | |
1601 | ||
1602 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
1603 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
1604 | sizeof(mb_param), &mb_param) <= 0) { | |
1605 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1606 | return -1; | |
1607 | } | |
1608 | ||
1609 | s->rlayer.write_sequence[7] += mb_param.interleave; | |
1610 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
1611 | int j = 6; | |
1612 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; | |
1613 | } | |
1614 | ||
1615 | wb->offset = 0; | |
1616 | wb->left = packlen; | |
1617 | ||
1618 | return 1; | |
1619 | #else /* !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK */ | |
1620 | return 0; | |
1621 | #endif | |
1622 | } | |
1623 | ||
1624 | static int tls_write_records_standard(OSSL_RECORD_LAYER *rl, | |
1625 | OSSL_RECORD_TEMPLATE *templates, | |
1626 | size_t numtempl) | |
34a4068c | 1627 | { |
2b71b042 MC |
1628 | WPACKET pkt[SSL_MAX_PIPELINES + 1]; |
1629 | SSL3_RECORD wr[SSL_MAX_PIPELINES + 1]; | |
1630 | WPACKET *thispkt; | |
1631 | SSL3_RECORD *thiswr; | |
1632 | unsigned char *recordstart; | |
23bf52a4 | 1633 | int mac_size, clear = 0, ret = 0; |
2b71b042 MC |
1634 | int eivlen = 0; |
1635 | size_t align = 0; | |
1636 | SSL3_BUFFER *wb; | |
1637 | SSL_SESSION *sess; | |
1638 | size_t totlen = 0, len, wpinited = 0; | |
1639 | size_t j, prefix = 0; | |
1640 | int using_ktls; | |
1641 | /* TODO(RECLAYER): REMOVE ME */ | |
1642 | SSL_CONNECTION *s = rl->cbarg; | |
1643 | SSL *ssl = SSL_CONNECTION_GET_SSL(s); | |
1644 | OSSL_RECORD_TEMPLATE prefixtempl; | |
1645 | OSSL_RECORD_TEMPLATE *thistempl; | |
1646 | ||
2b71b042 MC |
1647 | sess = s->session; |
1648 | ||
1649 | if ((sess == NULL) | |
1650 | || (s->enc_write_ctx == NULL) | |
1651 | || (EVP_MD_CTX_get0_md(s->write_hash) == NULL)) { | |
1652 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ | |
1653 | mac_size = 0; | |
1654 | } else { | |
1655 | mac_size = EVP_MD_CTX_get_size(s->write_hash); | |
1656 | if (mac_size < 0) { | |
320145d5 | 1657 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1658 | goto err; |
1659 | } | |
1660 | } | |
1661 | ||
1662 | /* | |
1663 | * 'create_empty_fragment' is true only when we have recursively called | |
1664 | * ourselves. | |
1665 | * Do we need to do that recursion in order to add an empty record prefix? | |
1666 | */ | |
b9e4e783 | 1667 | prefix = rl->need_empty_fragments |
2b71b042 | 1668 | && !clear |
2b71b042 MC |
1669 | && templates[0].type == SSL3_RT_APPLICATION_DATA; |
1670 | ||
23bf52a4 | 1671 | /* |
85b358b0 MC |
1672 | * In the prefix case we can allocate a much smaller buffer. Otherwise we |
1673 | * just allocate the default buffer size | |
23bf52a4 | 1674 | */ |
85b358b0 MC |
1675 | if (!tls_setup_write_buffer(rl, numtempl + prefix, |
1676 | prefix ? MAX_PREFIX_LEN : 0, 0)) { | |
23bf52a4 MC |
1677 | /* RLAYERfatal() already called */ |
1678 | goto err; | |
2b71b042 MC |
1679 | } |
1680 | ||
b5cf81f7 | 1681 | using_ktls = BIO_get_ktls_send(rl->bio); |
2b71b042 | 1682 | if (!ossl_assert(!using_ktls || !prefix)) { |
320145d5 | 1683 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1684 | goto err; |
1685 | } | |
1686 | ||
1687 | if (prefix) { | |
1688 | /* | |
1689 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
1690 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
1691 | */ | |
1692 | prefixtempl.buf = NULL; | |
1d367677 | 1693 | prefixtempl.version = templates[0].version; |
2b71b042 MC |
1694 | prefixtempl.buflen = 0; |
1695 | prefixtempl.type = SSL3_RT_APPLICATION_DATA; | |
1696 | wpinited = 1; | |
1697 | ||
151f313e | 1698 | wb = &rl->wbuf[0]; |
2b71b042 MC |
1699 | /* TODO(RECLAYER): This alignment calculation no longer seems right */ |
1700 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 | |
1701 | /* | |
1702 | * extra fragment would be couple of cipher blocks, which would be | |
1703 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
1704 | * payload, then we can just pretend we simply have two headers. | |
1705 | */ | |
1706 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; | |
1707 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); | |
1708 | #endif | |
1709 | SSL3_BUFFER_set_offset(wb, align); | |
1710 | if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), | |
1711 | SSL3_BUFFER_get_len(wb), 0) | |
1712 | || !WPACKET_allocate_bytes(&pkt[0], align, NULL)) { | |
320145d5 | 1713 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1714 | goto err; |
1715 | } | |
1716 | wpinited = 1; | |
1717 | } | |
1718 | for (j = 0; j < numtempl; j++) { | |
1719 | thispkt = &pkt[prefix + j]; | |
1720 | ||
151f313e | 1721 | wb = &rl->wbuf[prefix + j]; |
2b71b042 MC |
1722 | wb->type = templates[j].type; |
1723 | ||
1724 | if (using_ktls) { | |
1725 | /* | |
1726 | * ktls doesn't modify the buffer, but to avoid a warning we need | |
1727 | * to discard the const qualifier. | |
1728 | * This doesn't leak memory because the buffers have been | |
1729 | * released when switching to ktls. | |
1730 | */ | |
1731 | SSL3_BUFFER_set_buf(wb, (unsigned char *)templates[j].buf); | |
1732 | SSL3_BUFFER_set_offset(wb, 0); | |
1733 | SSL3_BUFFER_set_app_buffer(wb, 1); | |
1734 | } else { | |
1735 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 | |
1736 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; | |
1737 | align = SSL3_ALIGN_PAYLOAD - 1 | |
1738 | - ((align - 1) % SSL3_ALIGN_PAYLOAD); | |
1739 | #endif | |
1740 | /* TODO(RECLAYER): Is this alignment actually used somewhere? */ | |
1741 | SSL3_BUFFER_set_offset(wb, align); | |
1742 | if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), | |
1743 | SSL3_BUFFER_get_len(wb), 0) | |
1744 | || !WPACKET_allocate_bytes(thispkt, align, NULL)) { | |
320145d5 | 1745 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1746 | goto err; |
1747 | } | |
1748 | wpinited++; | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | if (!using_ktls) { | |
1753 | /* Explicit IV length, block ciphers appropriate version flag */ | |
f2892e21 MC |
1754 | if (s->enc_write_ctx != NULL && RLAYER_USE_EXPLICIT_IV(rl) |
1755 | && rl->version != TLS1_3_VERSION) { | |
2b71b042 MC |
1756 | int mode = EVP_CIPHER_CTX_get_mode(s->enc_write_ctx); |
1757 | if (mode == EVP_CIPH_CBC_MODE) { | |
1758 | eivlen = EVP_CIPHER_CTX_get_iv_length(s->enc_write_ctx); | |
1759 | if (eivlen < 0) { | |
320145d5 | 1760 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_LIBRARY_BUG); |
2b71b042 MC |
1761 | goto err; |
1762 | } | |
1763 | if (eivlen <= 1) | |
1764 | eivlen = 0; | |
1765 | } else if (mode == EVP_CIPH_GCM_MODE) { | |
1766 | /* Need explicit part of IV for GCM mode */ | |
1767 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
1768 | } else if (mode == EVP_CIPH_CCM_MODE) { | |
1769 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
1770 | } | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | totlen = 0; | |
1775 | /* Clear our SSL3_RECORD structures */ | |
1776 | memset(wr, 0, sizeof(wr)); | |
1777 | for (j = 0; j < numtempl + prefix; j++) { | |
2b71b042 MC |
1778 | unsigned char *compressdata = NULL; |
1779 | size_t maxcomplen; | |
1780 | unsigned int rectype; | |
1781 | ||
1782 | thispkt = &pkt[j]; | |
1783 | thiswr = &wr[j]; | |
1784 | thistempl = (j == 0 && prefix == 1) ? &prefixtempl : | |
1785 | &templates[j - prefix]; | |
1786 | ||
1787 | /* | |
1788 | * In TLSv1.3, once encrypting, we always use application data for the | |
1789 | * record type | |
1790 | */ | |
f2892e21 | 1791 | if (rl->version == TLS1_3_VERSION |
2b71b042 MC |
1792 | && s->enc_write_ctx != NULL |
1793 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
1794 | || thistempl->type != SSL3_RT_ALERT)) | |
1795 | rectype = SSL3_RT_APPLICATION_DATA; | |
1796 | else | |
1797 | rectype = thistempl->type; | |
1798 | ||
1799 | SSL3_RECORD_set_type(thiswr, rectype); | |
1d367677 | 1800 | SSL3_RECORD_set_rec_version(thiswr, thistempl->version); |
2b71b042 MC |
1801 | |
1802 | maxcomplen = thistempl->buflen; | |
1803 | if (s->compress != NULL) | |
1804 | maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; | |
1805 | ||
1806 | /* | |
1807 | * When using offload kernel will write the header. | |
1808 | * Otherwise write the header now | |
1809 | */ | |
1810 | if (!using_ktls | |
1811 | && (!WPACKET_put_bytes_u8(thispkt, rectype) | |
1d367677 | 1812 | || !WPACKET_put_bytes_u16(thispkt, thistempl->version) |
2b71b042 MC |
1813 | || !WPACKET_start_sub_packet_u16(thispkt) |
1814 | || (eivlen > 0 | |
1815 | && !WPACKET_allocate_bytes(thispkt, eivlen, NULL)) | |
1816 | || (maxcomplen > 0 | |
1817 | && !WPACKET_reserve_bytes(thispkt, maxcomplen, | |
1818 | &compressdata)))) { | |
320145d5 | 1819 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1820 | goto err; |
1821 | } | |
1822 | ||
1823 | /* lets setup the record stuff. */ | |
1824 | SSL3_RECORD_set_data(thiswr, compressdata); | |
1825 | SSL3_RECORD_set_length(thiswr, thistempl->buflen); | |
1826 | /* | |
1827 | * TODO(RECLAYER): Cast away the const. Should be safe - by why is this | |
1828 | * necessary? | |
1829 | */ | |
1830 | SSL3_RECORD_set_input(thiswr, (unsigned char *)thistempl->buf); | |
1831 | totlen += thistempl->buflen; | |
1832 | ||
1833 | /* | |
1834 | * we now 'read' from thiswr->input, thiswr->length bytes into | |
1835 | * thiswr->data | |
1836 | */ | |
1837 | ||
1838 | /* first we compress */ | |
1839 | if (s->compress != NULL) { | |
1840 | if (!ssl3_do_compress(s, thiswr) | |
1841 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { | |
320145d5 | 1842 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_COMPRESSION_FAILURE); |
2b71b042 MC |
1843 | goto err; |
1844 | } | |
1845 | } else { | |
1846 | if (using_ktls) { | |
1847 | SSL3_RECORD_reset_data(&wr[j]); | |
1848 | } else { | |
1849 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { | |
320145d5 | 1850 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1851 | goto err; |
1852 | } | |
1853 | SSL3_RECORD_reset_input(&wr[j]); | |
1854 | } | |
1855 | } | |
1856 | ||
f2892e21 | 1857 | if (rl->version == TLS1_3_VERSION |
2b71b042 MC |
1858 | && !using_ktls |
1859 | && s->enc_write_ctx != NULL | |
1860 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
1861 | || thistempl->type != SSL3_RT_ALERT)) { | |
1862 | size_t rlen, max_send_fragment; | |
1863 | ||
1864 | if (!WPACKET_put_bytes_u8(thispkt, thistempl->type)) { | |
320145d5 | 1865 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1866 | goto err; |
1867 | } | |
1868 | SSL3_RECORD_add_length(thiswr, 1); | |
1869 | ||
1870 | /* Add TLS1.3 padding */ | |
1871 | max_send_fragment = ssl_get_max_send_fragment(s); | |
1872 | rlen = SSL3_RECORD_get_length(thiswr); | |
1873 | if (rlen < max_send_fragment) { | |
1874 | size_t padding = 0; | |
1875 | size_t max_padding = max_send_fragment - rlen; | |
5f95eb77 MC |
1876 | |
1877 | if (rl->padding != NULL) { | |
1878 | padding = rl->padding(rl->cbarg, thistempl->type, rlen); | |
eb7d6c2a MC |
1879 | } else if (rl->block_padding > 0) { |
1880 | size_t mask = rl->block_padding - 1; | |
2b71b042 MC |
1881 | size_t remainder; |
1882 | ||
1883 | /* optimize for power of 2 */ | |
eb7d6c2a | 1884 | if ((rl->block_padding & mask) == 0) |
2b71b042 MC |
1885 | remainder = rlen & mask; |
1886 | else | |
eb7d6c2a | 1887 | remainder = rlen % rl->block_padding; |
2b71b042 MC |
1888 | /* don't want to add a block of padding if we don't have to */ |
1889 | if (remainder == 0) | |
1890 | padding = 0; | |
1891 | else | |
eb7d6c2a | 1892 | padding = rl->block_padding - remainder; |
2b71b042 MC |
1893 | } |
1894 | if (padding > 0) { | |
1895 | /* do not allow the record to exceed max plaintext length */ | |
1896 | if (padding > max_padding) | |
1897 | padding = max_padding; | |
1898 | if (!WPACKET_memset(thispkt, 0, padding)) { | |
320145d5 MC |
1899 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, |
1900 | ERR_R_INTERNAL_ERROR); | |
2b71b042 MC |
1901 | goto err; |
1902 | } | |
1903 | SSL3_RECORD_add_length(thiswr, padding); | |
1904 | } | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * we should still have the output to thiswr->data and the input from | |
1910 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
1911 | * in the wb->buf | |
1912 | */ | |
1913 | ||
5361a5a9 | 1914 | if (!using_ktls && !rl->use_etm && mac_size != 0) { |
2b71b042 MC |
1915 | unsigned char *mac; |
1916 | ||
1917 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) | |
1918 | || !ssl->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
320145d5 | 1919 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1920 | goto err; |
1921 | } | |
1922 | } | |
1923 | ||
1924 | /* | |
1925 | * Reserve some bytes for any growth that may occur during encryption. | |
1926 | * This will be at most one cipher block or the tag length if using | |
1927 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
1928 | */ | |
1929 | if (!using_ktls) { | |
1930 | if (!WPACKET_reserve_bytes(thispkt, | |
1931 | SSL_RT_MAX_CIPHER_BLOCK_SIZE, | |
1932 | NULL) | |
320145d5 MC |
1933 | /* |
1934 | * We also need next the amount of bytes written to this | |
1935 | * sub-packet | |
1936 | */ | |
1937 | || !WPACKET_get_length(thispkt, &len)) { | |
1938 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
1939 | goto err; | |
2b71b042 MC |
1940 | } |
1941 | ||
1942 | /* Get a pointer to the start of this record excluding header */ | |
1943 | recordstart = WPACKET_get_curr(thispkt) - len; | |
1944 | SSL3_RECORD_set_data(thiswr, recordstart); | |
1945 | SSL3_RECORD_reset_input(thiswr); | |
1946 | SSL3_RECORD_set_length(thiswr, len); | |
1947 | } | |
1948 | } | |
1949 | ||
1950 | if (s->statem.enc_write_state == ENC_WRITE_STATE_WRITE_PLAIN_ALERTS) { | |
1951 | /* | |
1952 | * We haven't actually negotiated the version yet, but we're trying to | |
1953 | * send early data - so we need to use the tls13enc function. | |
1954 | */ | |
1955 | if (tls13_enc(s, wr, numtempl, 1, NULL, mac_size) < 1) { | |
320145d5 MC |
1956 | if (!ossl_statem_in_error(s)) |
1957 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2b71b042 MC |
1958 | goto err; |
1959 | } | |
1960 | } else { | |
1961 | if (!using_ktls) { | |
1962 | if (prefix) { | |
1963 | if (ssl->method->ssl3_enc->enc(s, wr, 1, 1, NULL, mac_size) < 1) { | |
320145d5 MC |
1964 | if (!ossl_statem_in_error(s)) |
1965 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2b71b042 MC |
1966 | goto err; |
1967 | } | |
1968 | } | |
1969 | if (ssl->method->ssl3_enc->enc(s, wr + prefix, numtempl, 1, NULL, | |
1970 | mac_size) < 1) { | |
320145d5 MC |
1971 | if (!ossl_statem_in_error(s)) |
1972 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); | |
2b71b042 MC |
1973 | goto err; |
1974 | } | |
1975 | } | |
1976 | } | |
1977 | ||
1978 | for (j = 0; j < prefix + numtempl; j++) { | |
1979 | size_t origlen; | |
1980 | ||
1981 | thispkt = &pkt[j]; | |
1982 | thiswr = &wr[j]; | |
1983 | thistempl = (prefix == 1 && j == 0) ? &prefixtempl | |
1984 | : &templates[j - prefix]; | |
1985 | ||
1986 | if (using_ktls) | |
1987 | goto mac_done; | |
1988 | ||
1989 | /* Allocate bytes for the encryption overhead */ | |
1990 | if (!WPACKET_get_length(thispkt, &origlen) | |
1991 | /* Encryption should never shrink the data! */ | |
1992 | || origlen > thiswr->length | |
1993 | || (thiswr->length > origlen | |
1994 | && !WPACKET_allocate_bytes(thispkt, | |
1995 | thiswr->length - origlen, | |
1996 | NULL))) { | |
320145d5 | 1997 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
1998 | goto err; |
1999 | } | |
5361a5a9 | 2000 | if (rl->use_etm && mac_size != 0) { |
2b71b042 MC |
2001 | unsigned char *mac; |
2002 | ||
2003 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) | |
2004 | || !ssl->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
320145d5 | 2005 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
2006 | goto err; |
2007 | } | |
2008 | SSL3_RECORD_add_length(thiswr, mac_size); | |
2009 | } | |
2010 | ||
2011 | if (!WPACKET_get_length(thispkt, &len) | |
2012 | || !WPACKET_close(thispkt)) { | |
320145d5 | 2013 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
2014 | goto err; |
2015 | } | |
2016 | ||
31059013 | 2017 | if (rl->msg_callback) { |
2b71b042 MC |
2018 | recordstart = WPACKET_get_curr(thispkt) - len |
2019 | - SSL3_RT_HEADER_LENGTH; | |
31059013 MC |
2020 | rl->msg_callback(1, thiswr->rec_version, SSL3_RT_HEADER, recordstart, |
2021 | SSL3_RT_HEADER_LENGTH, rl->cbarg); | |
2b71b042 | 2022 | |
f2892e21 | 2023 | if (rl->version == TLS1_3_VERSION && s->enc_write_ctx != NULL) { |
2b71b042 MC |
2024 | unsigned char ctype = thistempl->type; |
2025 | ||
31059013 MC |
2026 | rl->msg_callback(1, thiswr->rec_version, SSL3_RT_INNER_CONTENT_TYPE, |
2027 | &ctype, 1, rl->cbarg); | |
2b71b042 MC |
2028 | } |
2029 | } | |
2030 | ||
2031 | if (!WPACKET_finish(thispkt)) { | |
320145d5 | 2032 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
2b71b042 MC |
2033 | goto err; |
2034 | } | |
2035 | ||
2036 | /* header is added by the kernel when using offload */ | |
2037 | SSL3_RECORD_add_length(thiswr, SSL3_RT_HEADER_LENGTH); | |
2038 | ||
2039 | mac_done: | |
2040 | /* | |
2041 | * we should now have thiswr->data pointing to the encrypted data, which | |
2042 | * is thiswr->length long. | |
2043 | * Setting the type is not needed but helps for debugging | |
2044 | */ | |
2045 | SSL3_RECORD_set_type(thiswr, thistempl->type); | |
2046 | ||
2047 | /* now let's set up wb */ | |
151f313e | 2048 | SSL3_BUFFER_set_left(&rl->wbuf[j], SSL3_RECORD_get_length(thiswr)); |
2b71b042 MC |
2049 | } |
2050 | ||
23bf52a4 | 2051 | ret = 1; |
2b71b042 MC |
2052 | err: |
2053 | for (j = 0; j < wpinited; j++) | |
2054 | WPACKET_cleanup(&pkt[j]); | |
23bf52a4 MC |
2055 | return ret; |
2056 | } | |
2057 | ||
2058 | int tls_write_records(OSSL_RECORD_LAYER *rl, OSSL_RECORD_TEMPLATE *templates, | |
2059 | size_t numtempl) | |
2060 | { | |
2061 | int ret; | |
2062 | ||
2063 | /* Check we don't have pending data waiting to write */ | |
2064 | if (!ossl_assert(rl->nextwbuf >= rl->numwpipes | |
2065 | || SSL3_BUFFER_get_left(&rl->wbuf[rl->nextwbuf]) == 0)) { | |
2066 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
2067 | return OSSL_RECORD_RETURN_FATAL; | |
2068 | } | |
2069 | ||
2070 | ret = tls_write_records_multiblock(rl, templates, numtempl); | |
2071 | if (ret < 0) { | |
2072 | /* RLAYERfatal already called */ | |
2073 | return OSSL_RECORD_RETURN_FATAL; | |
2074 | } | |
2075 | if (ret == 0) { | |
2076 | /* Multiblock wasn't suitable so just do a standard write */ | |
2077 | if (!tls_write_records_standard(rl, templates, numtempl)) { | |
2078 | /* RLAYERfatal already called */ | |
2079 | return OSSL_RECORD_RETURN_FATAL; | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | rl->nextwbuf = 0; | |
2084 | /* we now just need to write the buffers */ | |
2085 | return tls_retry_write_records(rl); | |
34a4068c MC |
2086 | } |
2087 | ||
2b71b042 | 2088 | int tls_retry_write_records(OSSL_RECORD_LAYER *rl) |
34a4068c | 2089 | { |
320145d5 | 2090 | int i, ret; |
2b71b042 | 2091 | SSL3_BUFFER *thiswb; |
2b71b042 | 2092 | size_t tmpwrit = 0; |
2b71b042 | 2093 | |
e7694c69 | 2094 | if (rl->nextwbuf >= rl->numwpipes) |
320145d5 | 2095 | return OSSL_RECORD_RETURN_SUCCESS; |
151f313e | 2096 | |
2b71b042 | 2097 | for (;;) { |
151f313e MC |
2098 | thiswb = &rl->wbuf[rl->nextwbuf]; |
2099 | ||
2b71b042 | 2100 | clear_sys_error(); |
b5cf81f7 | 2101 | if (rl->bio != NULL) { |
2b71b042 MC |
2102 | /* |
2103 | * To prevent coalescing of control and data messages, | |
2104 | * such as in buffer_write, we flush the BIO | |
2105 | */ | |
b5cf81f7 | 2106 | if (BIO_get_ktls_send(rl->bio) |
2b71b042 | 2107 | && thiswb->type != SSL3_RT_APPLICATION_DATA) { |
b5cf81f7 | 2108 | i = BIO_flush(rl->bio); |
320145d5 MC |
2109 | if (i <= 0) { |
2110 | if (BIO_should_retry(rl->bio)) | |
2111 | ret = OSSL_RECORD_RETURN_RETRY; | |
2112 | else | |
2113 | ret = OSSL_RECORD_RETURN_FATAL; | |
2114 | return ret; | |
2115 | } | |
b5cf81f7 | 2116 | BIO_set_ktls_ctrl_msg(rl->bio, thiswb->type); |
2b71b042 | 2117 | } |
b5cf81f7 | 2118 | i = BIO_write(rl->bio, (char *) |
2b71b042 MC |
2119 | &(SSL3_BUFFER_get_buf(thiswb) |
2120 | [SSL3_BUFFER_get_offset(thiswb)]), | |
2121 | (unsigned int)SSL3_BUFFER_get_left(thiswb)); | |
320145d5 | 2122 | if (i >= 0) { |
2b71b042 | 2123 | tmpwrit = i; |
320145d5 MC |
2124 | if (i == 0 && BIO_should_retry(rl->bio)) |
2125 | ret = OSSL_RECORD_RETURN_RETRY; | |
2126 | else | |
2127 | ret = OSSL_RECORD_RETURN_SUCCESS; | |
2128 | } else { | |
2129 | if (BIO_should_retry(rl->bio)) | |
2130 | ret = OSSL_RECORD_RETURN_RETRY; | |
2131 | else | |
2132 | ret = OSSL_RECORD_RETURN_FATAL; | |
2133 | } | |
2b71b042 | 2134 | } else { |
320145d5 MC |
2135 | RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, SSL_R_BIO_NOT_SET); |
2136 | ret = OSSL_RECORD_RETURN_FATAL; | |
2b71b042 MC |
2137 | i = -1; |
2138 | } | |
2139 | ||
2140 | /* | |
2141 | * When an empty fragment is sent on a connection using KTLS, | |
2142 | * it is sent as a write of zero bytes. If this zero byte | |
2143 | * write succeeds, i will be 0 rather than a non-zero value. | |
2144 | * Treat i == 0 as success rather than an error for zero byte | |
2145 | * writes to permit this case. | |
2146 | */ | |
2147 | if (i >= 0 && tmpwrit == SSL3_BUFFER_get_left(thiswb)) { | |
2148 | SSL3_BUFFER_set_left(thiswb, 0); | |
2149 | SSL3_BUFFER_add_offset(thiswb, tmpwrit); | |
e7694c69 | 2150 | if (++(rl->nextwbuf) < rl->numwpipes) |
2b71b042 | 2151 | continue; |
151f313e | 2152 | |
e7694c69 | 2153 | if (rl->nextwbuf == rl->numwpipes |
151f313e MC |
2154 | && (rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0) |
2155 | tls_release_write_buffer(rl); | |
320145d5 | 2156 | return OSSL_RECORD_RETURN_SUCCESS; |
2b71b042 | 2157 | } else if (i <= 0) { |
5361a5a9 | 2158 | if (rl->isdtls) { |
2b71b042 MC |
2159 | /* |
2160 | * For DTLS, just drop it. That's kind of the whole point in | |
2161 | * using a datagram service | |
2162 | */ | |
2163 | SSL3_BUFFER_set_left(thiswb, 0); | |
e7694c69 | 2164 | if (++(rl->nextwbuf) == rl->numwpipes |
151f313e MC |
2165 | && (rl->mode & SSL_MODE_RELEASE_BUFFERS) != 0) |
2166 | tls_release_write_buffer(rl); | |
2167 | ||
2b71b042 | 2168 | } |
320145d5 | 2169 | return ret; |
2b71b042 MC |
2170 | } |
2171 | SSL3_BUFFER_add_offset(thiswb, tmpwrit); | |
2172 | SSL3_BUFFER_sub_left(thiswb, tmpwrit); | |
2173 | } | |
34a4068c MC |
2174 | } |
2175 | ||
1853d20a | 2176 | int tls_get_alert_code(OSSL_RECORD_LAYER *rl) |
e2d5742b MC |
2177 | { |
2178 | return rl->alert; | |
2179 | } | |
2180 | ||
1853d20a | 2181 | int tls_set1_bio(OSSL_RECORD_LAYER *rl, BIO *bio) |
e2d5742b MC |
2182 | { |
2183 | if (bio != NULL && !BIO_up_ref(bio)) | |
2184 | return 0; | |
2185 | BIO_free(rl->bio); | |
2186 | rl->bio = bio; | |
2187 | ||
2188 | return 1; | |
2189 | } | |
2190 | ||
1853d20a MC |
2191 | /* Shared by most methods except tlsany_meth */ |
2192 | int tls_default_set_protocol_version(OSSL_RECORD_LAYER *rl, int version) | |
2193 | { | |
2194 | if (rl->version != version) | |
2195 | return 0; | |
2196 | ||
2197 | return 1; | |
2198 | } | |
2199 | ||
2200 | int tls_set_protocol_version(OSSL_RECORD_LAYER *rl, int version) | |
2201 | { | |
2202 | return rl->funcs->set_protocol_version(rl, version); | |
2203 | } | |
2204 | ||
2205 | void tls_set_plain_alerts(OSSL_RECORD_LAYER *rl, int allow) | |
2206 | { | |
2207 | rl->allow_plain_alerts = allow; | |
2208 | } | |
2209 | ||
2210 | void tls_set_first_handshake(OSSL_RECORD_LAYER *rl, int first) | |
2211 | { | |
2212 | rl->is_first_handshake = first; | |
2213 | } | |
2214 | ||
8124ab56 MC |
2215 | void tls_set_max_pipelines(OSSL_RECORD_LAYER *rl, size_t max_pipelines) |
2216 | { | |
2217 | rl->max_pipelines = max_pipelines; | |
2218 | if (max_pipelines > 1) | |
2219 | rl->read_ahead = 1; | |
2220 | } | |
2221 | ||
d0b17ea0 MC |
2222 | void tls_get_state(OSSL_RECORD_LAYER *rl, const char **shortstr, |
2223 | const char **longstr) | |
2224 | { | |
2225 | const char *shrt, *lng; | |
1704961c | 2226 | |
d0b17ea0 MC |
2227 | switch (rl->rstate) { |
2228 | case SSL_ST_READ_HEADER: | |
2229 | shrt = "RH"; | |
2230 | lng = "read header"; | |
2231 | break; | |
2232 | case SSL_ST_READ_BODY: | |
2233 | shrt = "RB"; | |
2234 | lng = "read body"; | |
2235 | break; | |
2236 | default: | |
2237 | shrt = lng = "unknown"; | |
2238 | break; | |
2239 | } | |
2240 | if (shortstr != NULL) | |
2241 | *shortstr = shrt; | |
2242 | if (longstr != NULL) | |
2243 | *longstr = lng; | |
2244 | } | |
2245 | ||
34a4068c MC |
2246 | const OSSL_RECORD_METHOD ossl_tls_record_method = { |
2247 | tls_new_record_layer, | |
2248 | tls_free, | |
2249 | tls_reset, | |
2250 | tls_unprocessed_read_pending, | |
2251 | tls_processed_read_pending, | |
2252 | tls_app_data_pending, | |
2253 | tls_write_pending, | |
2254 | tls_get_max_record_len, | |
2255 | tls_get_max_records, | |
2b71b042 MC |
2256 | tls_write_records, |
2257 | tls_retry_write_records, | |
34a4068c | 2258 | tls_read_record, |
e2d5742b MC |
2259 | tls_release_record, |
2260 | tls_get_alert_code, | |
2261 | tls_set1_bio, | |
1853d20a MC |
2262 | tls_set_protocol_version, |
2263 | tls_set_plain_alerts, | |
2264 | tls_set_first_handshake, | |
8124ab56 | 2265 | tls_set_max_pipelines, |
d0b17ea0 | 2266 | NULL, |
4566dae7 MC |
2267 | tls_get_state, |
2268 | tls_set_options | |
cc110a0a | 2269 | }; |