]>
Commit | Line | Data |
---|---|---|
846e33c7 | 1 | /* |
6738bf14 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
c51ae173 | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
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 | |
c51ae173 | 8 | */ |
d02b48c6 RE |
9 | |
10 | #include <stdio.h> | |
339da43d | 11 | #include <limits.h> |
d02b48c6 | 12 | #include <errno.h> |
706457b7 | 13 | #include "../ssl_local.h" |
ec577822 BM |
14 | #include <openssl/evp.h> |
15 | #include <openssl/buffer.h> | |
637f374a | 16 | #include <openssl/rand.h> |
706457b7 | 17 | #include "record_local.h" |
0d345f0e | 18 | #include "internal/packet.h" |
d02b48c6 | 19 | |
0f113f3e MC |
20 | #if defined(OPENSSL_SMALL_FOOTPRINT) || \ |
21 | !( defined(AES_ASM) && ( \ | |
22 | defined(__x86_64) || defined(__x86_64__) || \ | |
fbaf30d0 | 23 | defined(_M_AMD64) || defined(_M_X64) ) \ |
0f113f3e | 24 | ) |
a9c6edcd AP |
25 | # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
26 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
27 | #endif | |
28 | ||
c036e210 MC |
29 | void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s) |
30 | { | |
31 | rl->s = s; | |
78fcddbb | 32 | RECORD_LAYER_set_first_record(&s->rlayer); |
94777c9c | 33 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
c036e210 MC |
34 | } |
35 | ||
af9752e5 MC |
36 | void RECORD_LAYER_clear(RECORD_LAYER *rl) |
37 | { | |
6b41b3f5 | 38 | rl->rstate = SSL_ST_READ_HEADER; |
af9752e5 | 39 | |
a230b26e EK |
40 | /* |
41 | * Do I need to clear read_ahead? As far as I can tell read_ahead did not | |
af9752e5 MC |
42 | * previously get reset by SSL_clear...so I'll keep it that way..but is |
43 | * that right? | |
44 | */ | |
6b41b3f5 MC |
45 | |
46 | rl->packet = NULL; | |
47 | rl->packet_length = 0; | |
48 | rl->wnum = 0; | |
6b41b3f5 MC |
49 | memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); |
50 | rl->handshake_fragment_len = 0; | |
51 | rl->wpend_tot = 0; | |
52 | rl->wpend_type = 0; | |
53 | rl->wpend_ret = 0; | |
54 | rl->wpend_buf = NULL; | |
55 | ||
56 | SSL3_BUFFER_clear(&rl->rbuf); | |
4bf08600 | 57 | ssl3_release_write_buffer(rl->s); |
0aac3a6b | 58 | rl->numrpipes = 0; |
94777c9c | 59 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
6b41b3f5 | 60 | |
95cdad63 MC |
61 | RECORD_LAYER_reset_read_sequence(rl); |
62 | RECORD_LAYER_reset_write_sequence(rl); | |
0485d540 | 63 | |
6b41b3f5 | 64 | if (rl->d) |
5fb6f80c | 65 | DTLS_RECORD_LAYER_clear(rl); |
af9752e5 MC |
66 | } |
67 | ||
f161995e MC |
68 | void RECORD_LAYER_release(RECORD_LAYER *rl) |
69 | { | |
70 | if (SSL3_BUFFER_is_initialised(&rl->rbuf)) | |
71 | ssl3_release_read_buffer(rl->s); | |
d102d9df | 72 | if (rl->numwpipes > 0) |
f161995e | 73 | ssl3_release_write_buffer(rl->s); |
94777c9c | 74 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
f161995e MC |
75 | } |
76 | ||
b8c49611 | 77 | /* Checks if we have unprocessed read ahead data pending */ |
49580f25 | 78 | int RECORD_LAYER_read_pending(const RECORD_LAYER *rl) |
f161995e MC |
79 | { |
80 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; | |
81 | } | |
82 | ||
b8c49611 MC |
83 | /* Checks if we have decrypted unread record data pending */ |
84 | int RECORD_LAYER_processed_read_pending(const RECORD_LAYER *rl) | |
85 | { | |
86 | size_t curr_rec = 0, num_recs = RECORD_LAYER_get_numrpipes(rl); | |
87 | const SSL3_RECORD *rr = rl->rrec; | |
88 | ||
89 | while (curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec])) | |
90 | curr_rec++; | |
91 | ||
92 | return curr_rec < num_recs; | |
93 | } | |
94 | ||
49580f25 | 95 | int RECORD_LAYER_write_pending(const RECORD_LAYER *rl) |
f161995e | 96 | { |
d102d9df | 97 | return (rl->numwpipes > 0) |
a230b26e | 98 | && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0; |
f161995e MC |
99 | } |
100 | ||
de07f311 MC |
101 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
102 | { | |
95cdad63 | 103 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
104 | } |
105 | ||
106 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
107 | { | |
95cdad63 | 108 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
109 | } |
110 | ||
8b0e934a | 111 | size_t ssl3_pending(const SSL *s) |
d5a25ae0 | 112 | { |
8b0e934a | 113 | size_t i, num = 0; |
94777c9c | 114 | |
295c3f41 | 115 | if (s->rlayer.rstate == SSL_ST_READ_BODY) |
d5a25ae0 MC |
116 | return 0; |
117 | ||
94777c9c MC |
118 | for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { |
119 | if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) | |
a230b26e | 120 | != SSL3_RT_APPLICATION_DATA) |
94777c9c MC |
121 | return 0; |
122 | num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); | |
123 | } | |
124 | ||
125 | return num; | |
d5a25ae0 MC |
126 | } |
127 | ||
dad78fb1 MC |
128 | void SSL_CTX_set_default_read_buffer_len(SSL_CTX *ctx, size_t len) |
129 | { | |
130 | ctx->default_read_buf_len = len; | |
131 | } | |
132 | ||
133 | void SSL_set_default_read_buffer_len(SSL *s, size_t len) | |
134 | { | |
135 | SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s->rlayer), len); | |
136 | } | |
137 | ||
295c3f41 MC |
138 | const char *SSL_rstate_string_long(const SSL *s) |
139 | { | |
295c3f41 MC |
140 | switch (s->rlayer.rstate) { |
141 | case SSL_ST_READ_HEADER: | |
475965f2 | 142 | return "read header"; |
295c3f41 | 143 | case SSL_ST_READ_BODY: |
475965f2 | 144 | return "read body"; |
295c3f41 | 145 | case SSL_ST_READ_DONE: |
475965f2 | 146 | return "read done"; |
295c3f41 | 147 | default: |
475965f2 | 148 | return "unknown"; |
295c3f41 | 149 | } |
295c3f41 MC |
150 | } |
151 | ||
152 | const char *SSL_rstate_string(const SSL *s) | |
153 | { | |
295c3f41 MC |
154 | switch (s->rlayer.rstate) { |
155 | case SSL_ST_READ_HEADER: | |
475965f2 | 156 | return "RH"; |
295c3f41 | 157 | case SSL_ST_READ_BODY: |
475965f2 | 158 | return "RB"; |
295c3f41 | 159 | case SSL_ST_READ_DONE: |
475965f2 | 160 | return "RD"; |
295c3f41 | 161 | default: |
475965f2 | 162 | return "unknown"; |
295c3f41 | 163 | } |
295c3f41 MC |
164 | } |
165 | ||
4880672a | 166 | /* |
beacb0f0 | 167 | * Return values are as per SSL_read() |
4880672a | 168 | */ |
8e6d03ca | 169 | int ssl3_read_n(SSL *s, size_t n, size_t max, int extend, int clearold, |
54105ddd | 170 | size_t *readbytes) |
0f113f3e MC |
171 | { |
172 | /* | |
173 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
174 | * packet by another n bytes. The packet will be in the sub-array of | |
555cbb32 | 175 | * s->s3.rbuf.buf specified by s->packet and s->packet_length. (If |
52e1d7b1 | 176 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 177 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
178 | * if clearold == 1, move the packet to the start of the buffer; if |
179 | * clearold == 0 then leave any old packets where they were | |
0f113f3e | 180 | */ |
8e6d03ca | 181 | size_t len, left, align = 0; |
0f113f3e MC |
182 | unsigned char *pkt; |
183 | SSL3_BUFFER *rb; | |
184 | ||
8e6d03ca MC |
185 | if (n == 0) |
186 | return 0; | |
0f113f3e | 187 | |
88c23039 | 188 | rb = &s->rlayer.rbuf; |
0f113f3e | 189 | if (rb->buf == NULL) |
196f2cbb MC |
190 | if (!ssl3_setup_read_buffer(s)) { |
191 | /* SSLfatal() already called */ | |
0f113f3e | 192 | return -1; |
196f2cbb | 193 | } |
0f113f3e MC |
194 | |
195 | left = rb->left; | |
a4d64c7f | 196 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 | 197 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
753be41d | 198 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 199 | #endif |
d02b48c6 | 200 | |
0f113f3e MC |
201 | if (!extend) { |
202 | /* start with empty packet ... */ | |
203 | if (left == 0) | |
204 | rb->offset = align; | |
205 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
206 | /* | |
207 | * check if next packet length is large enough to justify payload | |
208 | * alignment... | |
209 | */ | |
210 | pkt = rb->buf + rb->offset; | |
211 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
212 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
213 | /* | |
214 | * Note that even if packet is corrupted and its length field | |
215 | * is insane, we can only be led to wrong decision about | |
216 | * whether memmove will occur or not. Header values has no | |
217 | * effect on memmove arguments and therefore no buffer | |
218 | * overrun can be triggered. | |
219 | */ | |
220 | memmove(rb->buf + align, pkt, left); | |
221 | rb->offset = align; | |
222 | } | |
223 | } | |
7a7048af MC |
224 | s->rlayer.packet = rb->buf + rb->offset; |
225 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
226 | /* ... now we can act as if 'extend' was set */ |
227 | } | |
228 | ||
a7faa6da MC |
229 | len = s->rlayer.packet_length; |
230 | pkt = rb->buf + align; | |
231 | /* | |
232 | * Move any available bytes to front of buffer: 'len' bytes already | |
233 | * pointed to by 'packet', 'left' extra ones at the end | |
234 | */ | |
235 | if (s->rlayer.packet != pkt && clearold == 1) { | |
236 | memmove(pkt, s->rlayer.packet, len + left); | |
237 | s->rlayer.packet = pkt; | |
238 | rb->offset = len + align; | |
239 | } | |
240 | ||
0f113f3e MC |
241 | /* |
242 | * For DTLS/UDP reads should not span multiple packets because the read | |
243 | * operation returns the whole packet at once (as long as it fits into | |
244 | * the buffer). | |
245 | */ | |
246 | if (SSL_IS_DTLS(s)) { | |
247 | if (left == 0 && extend) | |
248 | return 0; | |
249 | if (left > 0 && n > left) | |
250 | n = left; | |
251 | } | |
252 | ||
253 | /* if there is enough in the buffer from a previous read, take some */ | |
254 | if (left >= n) { | |
7a7048af | 255 | s->rlayer.packet_length += n; |
0f113f3e MC |
256 | rb->left = left - n; |
257 | rb->offset += n; | |
54105ddd | 258 | *readbytes = n; |
8e6d03ca | 259 | return 1; |
0f113f3e MC |
260 | } |
261 | ||
262 | /* else we need to read more data */ | |
263 | ||
196f2cbb MC |
264 | if (n > rb->len - rb->offset) { |
265 | /* does not happen */ | |
266 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_N, | |
267 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
268 | return -1; |
269 | } | |
270 | ||
c35e921f BP |
271 | /* |
272 | * Ktls always reads full records. | |
273 | * Also, we always act like read_ahead is set for DTLS. | |
274 | */ | |
275 | if (!BIO_get_ktls_recv(s->rbio) && !s->rlayer.read_ahead | |
276 | && !SSL_IS_DTLS(s)) { | |
0f113f3e MC |
277 | /* ignore max parameter */ |
278 | max = n; | |
c35e921f | 279 | } else { |
0f113f3e MC |
280 | if (max < n) |
281 | max = n; | |
ff04799d | 282 | if (max > rb->len - rb->offset) |
0f113f3e MC |
283 | max = rb->len - rb->offset; |
284 | } | |
285 | ||
286 | while (left < n) { | |
f0ca8f89 | 287 | size_t bioread = 0; |
8e6d03ca MC |
288 | int ret; |
289 | ||
0f113f3e | 290 | /* |
555cbb32 | 291 | * Now we have len+left bytes at the front of s->s3.rbuf.buf and |
0f113f3e MC |
292 | * need to read in more until we have len+n (up to len+max if |
293 | * possible) | |
294 | */ | |
295 | ||
296 | clear_sys_error(); | |
297 | if (s->rbio != NULL) { | |
298 | s->rwstate = SSL_READING; | |
8e6d03ca MC |
299 | /* TODO(size_t): Convert this function */ |
300 | ret = BIO_read(s->rbio, pkt + len + left, max - left); | |
301 | if (ret >= 0) | |
302 | bioread = ret; | |
0f113f3e | 303 | } else { |
196f2cbb MC |
304 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_N, |
305 | SSL_R_READ_BIO_NOT_SET); | |
8e6d03ca | 306 | ret = -1; |
0f113f3e MC |
307 | } |
308 | ||
8e6d03ca | 309 | if (ret <= 0) { |
0f113f3e MC |
310 | rb->left = left; |
311 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
312 | if (len + left == 0) | |
313 | ssl3_release_read_buffer(s); | |
beacb0f0 | 314 | return ret; |
0f113f3e | 315 | } |
8e6d03ca | 316 | left += bioread; |
0f113f3e MC |
317 | /* |
318 | * reads should *never* span multiple packets for DTLS because the | |
319 | * underlying transport protocol is message oriented as opposed to | |
320 | * byte oriented as in the TLS case. | |
321 | */ | |
322 | if (SSL_IS_DTLS(s)) { | |
323 | if (n > left) | |
324 | n = left; /* makes the while condition false */ | |
325 | } | |
326 | } | |
327 | ||
328 | /* done reading, now the book-keeping */ | |
329 | rb->offset += n; | |
330 | rb->left = left - n; | |
7a7048af | 331 | s->rlayer.packet_length += n; |
0f113f3e | 332 | s->rwstate = SSL_NOTHING; |
54105ddd | 333 | *readbytes = n; |
8e6d03ca | 334 | return 1; |
0f113f3e MC |
335 | } |
336 | ||
0f113f3e MC |
337 | /* |
338 | * Call this to write data in records of type 'type' It will return <= 0 if | |
339 | * not all data has been sent or non-blocking IO. | |
d02b48c6 | 340 | */ |
7ee8627f MC |
341 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len, |
342 | size_t *written) | |
0f113f3e MC |
343 | { |
344 | const unsigned char *buf = buf_; | |
7ee8627f | 345 | size_t tot; |
cf72c757 | 346 | size_t n, max_send_fragment, split_send_fragment, maxpipes; |
f1f7598c | 347 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
cf72c757 | 348 | size_t nw; |
f1f7598c | 349 | #endif |
d102d9df | 350 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 351 | int i; |
7ee8627f | 352 | size_t tmpwrit; |
0f113f3e MC |
353 | |
354 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 355 | tot = s->rlayer.wnum; |
0f113f3e MC |
356 | /* |
357 | * ensure that if we end up with a smaller value of data to write out | |
3519bae5 | 358 | * than the original len from a write which didn't complete for |
0f113f3e MC |
359 | * non-blocking I/O and also somehow ended up avoiding the check for |
360 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
361 | * possible to end up with (len-tot) as a large number that will then | |
362 | * promptly send beyond the end of the users buffer ... so we trap and | |
363 | * report the error in a way the user will notice | |
364 | */ | |
bd91e3c8 | 365 | if ((len < s->rlayer.wnum) |
cbbe9186 | 366 | || ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) { |
c2853382 MC |
367 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
368 | SSL_R_BAD_LENGTH); | |
1c2e5d56 MC |
369 | return -1; |
370 | } | |
371 | ||
7daf7156 | 372 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
196f2cbb MC |
373 | && !early_data_count_ok(s, len, 0, 1)) { |
374 | /* SSLfatal() already called */ | |
7daf7156 | 375 | return -1; |
196f2cbb | 376 | } |
7daf7156 | 377 | |
1c2e5d56 MC |
378 | s->rlayer.wnum = 0; |
379 | ||
feb9e31c MC |
380 | /* |
381 | * If we are supposed to be sending a KeyUpdate then go into init unless we | |
382 | * have writes pending - in which case we should finish doing that first. | |
383 | */ | |
384 | if (wb->left == 0 && s->key_update != SSL_KEY_UPDATE_NONE) | |
385 | ossl_statem_set_in_init(s, 1); | |
386 | ||
59cebcf9 MC |
387 | /* |
388 | * When writing early data on the server side we could be "in_init" in | |
389 | * between receiving the EoED and the CF - but we don't want to handle those | |
390 | * messages yet. | |
391 | */ | |
392 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s) | |
393 | && s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) { | |
1c2e5d56 | 394 | i = s->handshake_func(s); |
c2853382 | 395 | /* SSLfatal() already called */ |
1c2e5d56 | 396 | if (i < 0) |
7ee8627f | 397 | return i; |
1c2e5d56 | 398 | if (i == 0) { |
1c2e5d56 MC |
399 | return -1; |
400 | } | |
0f113f3e MC |
401 | } |
402 | ||
403 | /* | |
404 | * first check if there is a SSL3_BUFFER still being written out. This | |
405 | * will happen with non blocking IO | |
406 | */ | |
407 | if (wb->left != 0) { | |
c2853382 | 408 | /* SSLfatal() already called if appropriate */ |
7ee8627f MC |
409 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, |
410 | &tmpwrit); | |
0f113f3e MC |
411 | if (i <= 0) { |
412 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 413 | s->rlayer.wnum = tot; |
0f113f3e MC |
414 | return i; |
415 | } | |
7ee8627f | 416 | tot += tmpwrit; /* this might be last fragment */ |
0f113f3e | 417 | } |
a9c6edcd | 418 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
419 | /* |
420 | * Depending on platform multi-block can deliver several *times* | |
421 | * better performance. Downside is that it has to allocate | |
8483a003 | 422 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
423 | * compromise is considered worthy. |
424 | */ | |
425 | if (type == SSL3_RT_APPLICATION_DATA && | |
cf72c757 | 426 | len >= 4 * (max_send_fragment = ssl_get_max_send_fragment(s)) && |
0f113f3e | 427 | s->compress == NULL && s->msg_callback == NULL && |
28a31a0a | 428 | !SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && |
846ec07d | 429 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
430 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
431 | unsigned char aad[13]; | |
432 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
8e6d03ca | 433 | size_t packlen; |
e3c9727f | 434 | int packleni; |
0f113f3e MC |
435 | |
436 | /* minimize address aliasing conflicts */ | |
437 | if ((max_send_fragment & 0xfff) == 0) | |
438 | max_send_fragment -= 512; | |
439 | ||
440 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
441 | ssl3_release_write_buffer(s); | |
442 | ||
443 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
444 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
8b0e934a | 445 | (int)max_send_fragment, NULL); |
0f113f3e | 446 | |
7ee8627f | 447 | if (len >= 8 * max_send_fragment) |
0f113f3e MC |
448 | packlen *= 8; |
449 | else | |
450 | packlen *= 4; | |
451 | ||
58c27c20 | 452 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
c2853382 | 453 | /* SSLfatal() already called */ |
918bb865 MC |
454 | return -1; |
455 | } | |
0f113f3e | 456 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
457 | /* free jumbo buffer */ |
458 | ssl3_release_write_buffer(s); | |
8b0e934a MC |
459 | *written = tot; |
460 | return 1; | |
0f113f3e MC |
461 | } |
462 | ||
463 | n = (len - tot); | |
464 | for (;;) { | |
465 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
466 | /* free jumbo buffer */ |
467 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
468 | break; |
469 | } | |
470 | ||
555cbb32 | 471 | if (s->s3.alert_dispatch) { |
0f113f3e MC |
472 | i = s->method->ssl_dispatch_alert(s); |
473 | if (i <= 0) { | |
c2853382 | 474 | /* SSLfatal() already called if appropriate */ |
e2228d31 | 475 | s->rlayer.wnum = tot; |
0f113f3e MC |
476 | return i; |
477 | } | |
478 | } | |
479 | ||
480 | if (n >= 8 * max_send_fragment) | |
481 | nw = max_send_fragment * (mb_param.interleave = 8); | |
482 | else | |
483 | nw = max_send_fragment * (mb_param.interleave = 4); | |
484 | ||
de07f311 | 485 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
486 | aad[8] = type; |
487 | aad[9] = (unsigned char)(s->version >> 8); | |
488 | aad[10] = (unsigned char)(s->version); | |
489 | aad[11] = 0; | |
490 | aad[12] = 0; | |
491 | mb_param.out = NULL; | |
492 | mb_param.inp = aad; | |
493 | mb_param.len = nw; | |
494 | ||
e3c9727f | 495 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, |
0f113f3e MC |
496 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, |
497 | sizeof(mb_param), &mb_param); | |
e3c9727f MC |
498 | packlen = (size_t)packleni; |
499 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
58c27c20 MC |
500 | /* free jumbo buffer */ |
501 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
502 | break; |
503 | } | |
504 | ||
505 | mb_param.out = wb->buf; | |
506 | mb_param.inp = &buf[tot]; | |
507 | mb_param.len = nw; | |
508 | ||
509 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
510 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
511 | sizeof(mb_param), &mb_param) <= 0) | |
512 | return -1; | |
513 | ||
de07f311 MC |
514 | s->rlayer.write_sequence[7] += mb_param.interleave; |
515 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 516 | int j = 6; |
de07f311 | 517 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
518 | } |
519 | ||
520 | wb->offset = 0; | |
521 | wb->left = packlen; | |
522 | ||
f8caa3c8 MC |
523 | s->rlayer.wpend_tot = nw; |
524 | s->rlayer.wpend_buf = &buf[tot]; | |
525 | s->rlayer.wpend_type = type; | |
526 | s->rlayer.wpend_ret = nw; | |
0f113f3e | 527 | |
7ee8627f | 528 | i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); |
0f113f3e | 529 | if (i <= 0) { |
c2853382 | 530 | /* SSLfatal() already called if appropriate */ |
1d2a18dc | 531 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
532 | /* free jumbo buffer */ |
533 | ssl3_release_write_buffer(s); | |
0f113f3e | 534 | } |
e2228d31 | 535 | s->rlayer.wnum = tot; |
0f113f3e MC |
536 | return i; |
537 | } | |
7ee8627f | 538 | if (tmpwrit == n) { |
58c27c20 MC |
539 | /* free jumbo buffer */ |
540 | ssl3_release_write_buffer(s); | |
7ee8627f MC |
541 | *written = tot + tmpwrit; |
542 | return 1; | |
0f113f3e | 543 | } |
7ee8627f MC |
544 | n -= tmpwrit; |
545 | tot += tmpwrit; | |
0f113f3e MC |
546 | } |
547 | } else | |
cf72c757 | 548 | #endif /* !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK */ |
0f113f3e MC |
549 | if (tot == len) { /* done? */ |
550 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
551 | ssl3_release_write_buffer(s); | |
552 | ||
7ee8627f MC |
553 | *written = tot; |
554 | return 1; | |
0f113f3e MC |
555 | } |
556 | ||
557 | n = (len - tot); | |
d102d9df | 558 | |
cf72c757 F |
559 | max_send_fragment = ssl_get_max_send_fragment(s); |
560 | split_send_fragment = ssl_get_split_send_fragment(s); | |
d102d9df MC |
561 | /* |
562 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 563 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
564 | * processing then we also only use 1 pipeline, or if we're not using |
565 | * explicit IVs | |
566 | */ | |
567 | maxpipes = s->max_pipelines; | |
568 | if (maxpipes > SSL_MAX_PIPELINES) { | |
569 | /* | |
570 | * We should have prevented this when we set max_pipelines so we | |
571 | * shouldn't get here | |
a230b26e | 572 | */ |
c2853382 MC |
573 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
574 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
575 | return -1; |
576 | } | |
577 | if (maxpipes == 0 | |
a230b26e EK |
578 | || s->enc_write_ctx == NULL |
579 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
580 | & EVP_CIPH_FLAG_PIPELINE) | |
581 | || !SSL_USE_EXPLICIT_IV(s)) | |
d102d9df | 582 | maxpipes = 1; |
cf72c757 F |
583 | if (max_send_fragment == 0 || split_send_fragment == 0 |
584 | || split_send_fragment > max_send_fragment) { | |
d102d9df | 585 | /* |
cf72c757 | 586 | * We should have prevented this when we set/get the split and max send |
d102d9df | 587 | * fragments so we shouldn't get here |
a230b26e | 588 | */ |
c2853382 MC |
589 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
590 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
591 | return -1; |
592 | } | |
593 | ||
0f113f3e | 594 | for (;;) { |
7ee8627f MC |
595 | size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
596 | size_t numpipes, j; | |
d102d9df MC |
597 | |
598 | if (n == 0) | |
599 | numpipes = 1; | |
0f113f3e | 600 | else |
d102d9df MC |
601 | numpipes = ((n - 1) / split_send_fragment) + 1; |
602 | if (numpipes > maxpipes) | |
603 | numpipes = maxpipes; | |
604 | ||
cf72c757 | 605 | if (n / numpipes >= max_send_fragment) { |
d102d9df MC |
606 | /* |
607 | * We have enough data to completely fill all available | |
608 | * pipelines | |
609 | */ | |
610 | for (j = 0; j < numpipes; j++) { | |
cf72c757 | 611 | pipelens[j] = max_send_fragment; |
d102d9df MC |
612 | } |
613 | } else { | |
614 | /* We can partially fill all available pipelines */ | |
615 | tmppipelen = n / numpipes; | |
616 | remain = n % numpipes; | |
617 | for (j = 0; j < numpipes; j++) { | |
618 | pipelens[j] = tmppipelen; | |
619 | if (j < remain) | |
620 | pipelens[j]++; | |
621 | } | |
622 | } | |
0f113f3e | 623 | |
7ee8627f MC |
624 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0, |
625 | &tmpwrit); | |
0f113f3e | 626 | if (i <= 0) { |
c2853382 | 627 | /* SSLfatal() already called if appropriate */ |
0f113f3e | 628 | /* XXX should we ssl3_release_write_buffer if i<0? */ |
e2228d31 | 629 | s->rlayer.wnum = tot; |
0f113f3e MC |
630 | return i; |
631 | } | |
632 | ||
ff04799d | 633 | if (tmpwrit == n || |
0f113f3e MC |
634 | (type == SSL3_RT_APPLICATION_DATA && |
635 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
636 | /* | |
637 | * next chunk of data should get another prepended empty fragment | |
638 | * in ciphersuites with known-IV weakness: | |
639 | */ | |
555cbb32 | 640 | s->s3.empty_fragment_done = 0; |
0f113f3e | 641 | |
8bbf63e4 MC |
642 | if (tmpwrit == n |
643 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) != 0 | |
644 | && !SSL_IS_DTLS(s)) | |
0f113f3e MC |
645 | ssl3_release_write_buffer(s); |
646 | ||
7ee8627f MC |
647 | *written = tot + tmpwrit; |
648 | return 1; | |
0f113f3e MC |
649 | } |
650 | ||
7ee8627f MC |
651 | n -= tmpwrit; |
652 | tot += tmpwrit; | |
0f113f3e MC |
653 | } |
654 | } | |
d02b48c6 | 655 | |
c103c7e2 | 656 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
7ee8627f MC |
657 | size_t *pipelens, size_t numpipes, |
658 | int create_empty_fragment, size_t *written) | |
0f113f3e | 659 | { |
c7c42022 | 660 | WPACKET pkt[SSL_MAX_PIPELINES]; |
d102d9df | 661 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; |
44e58f3b MC |
662 | WPACKET *thispkt; |
663 | SSL3_RECORD *thiswr; | |
c7c42022 | 664 | unsigned char *recordstart; |
0f113f3e | 665 | int i, mac_size, clear = 0; |
7ee8627f | 666 | size_t prefix_len = 0; |
829754a6 | 667 | int eivlen = 0; |
f4bd5de5 | 668 | size_t align = 0; |
d102d9df | 669 | SSL3_BUFFER *wb; |
0f113f3e | 670 | SSL_SESSION *sess; |
c7c42022 | 671 | size_t totlen = 0, len, wpinited = 0; |
7ee8627f | 672 | size_t j; |
0f113f3e | 673 | |
d102d9df MC |
674 | for (j = 0; j < numpipes; j++) |
675 | totlen += pipelens[j]; | |
0f113f3e MC |
676 | /* |
677 | * first check if there is a SSL3_BUFFER still being written out. This | |
678 | * will happen with non blocking IO | |
679 | */ | |
c2853382 MC |
680 | if (RECORD_LAYER_write_pending(&s->rlayer)) { |
681 | /* Calls SSLfatal() as required */ | |
7ee8627f | 682 | return ssl3_write_pending(s, type, buf, totlen, written); |
c2853382 | 683 | } |
0f113f3e MC |
684 | |
685 | /* If we have an alert to send, lets send it */ | |
555cbb32 | 686 | if (s->s3.alert_dispatch) { |
0f113f3e | 687 | i = s->method->ssl_dispatch_alert(s); |
c2853382 MC |
688 | if (i <= 0) { |
689 | /* SSLfatal() already called if appropriate */ | |
26a7d938 | 690 | return i; |
c2853382 | 691 | } |
0f113f3e MC |
692 | /* if it went, fall through and send more stuff */ |
693 | } | |
694 | ||
c2853382 MC |
695 | if (s->rlayer.numwpipes < numpipes) { |
696 | if (!ssl3_setup_write_buffer(s, numpipes, 0)) { | |
697 | /* SSLfatal() already called */ | |
0f113f3e | 698 | return -1; |
c2853382 MC |
699 | } |
700 | } | |
0f113f3e | 701 | |
d102d9df | 702 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
703 | return 0; |
704 | ||
0f113f3e MC |
705 | sess = s->session; |
706 | ||
707 | if ((sess == NULL) || | |
a230b26e | 708 | (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) { |
0f113f3e | 709 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
710 | mac_size = 0; |
711 | } else { | |
7ee8627f | 712 | /* TODO(siz_t): Convert me */ |
0f113f3e | 713 | mac_size = EVP_MD_CTX_size(s->write_hash); |
c2853382 MC |
714 | if (mac_size < 0) { |
715 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
716 | ERR_R_INTERNAL_ERROR); | |
0f113f3e | 717 | goto err; |
c2853382 | 718 | } |
0f113f3e | 719 | } |
d02b48c6 | 720 | |
0f113f3e MC |
721 | /* |
722 | * 'create_empty_fragment' is true only when this function calls itself | |
723 | */ | |
555cbb32 | 724 | if (!clear && !create_empty_fragment && !s->s3.empty_fragment_done) { |
0f113f3e MC |
725 | /* |
726 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
727 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
728 | */ | |
729 | ||
555cbb32 | 730 | if (s->s3.need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { |
0f113f3e MC |
731 | /* |
732 | * recursive function call with 'create_empty_fragment' set; this | |
733 | * prepares and buffers the data for an empty fragment (these | |
734 | * 'prefix_len' bytes are sent out later together with the actual | |
735 | * payload) | |
736 | */ | |
7ee8627f MC |
737 | size_t tmppipelen = 0; |
738 | int ret; | |
d102d9df | 739 | |
7ee8627f | 740 | ret = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1, &prefix_len); |
c2853382 MC |
741 | if (ret <= 0) { |
742 | /* SSLfatal() already called if appropriate */ | |
0f113f3e | 743 | goto err; |
c2853382 | 744 | } |
0f113f3e MC |
745 | |
746 | if (prefix_len > | |
a230b26e | 747 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) { |
0f113f3e | 748 | /* insufficient space */ |
c2853382 MC |
749 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
750 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
751 | goto err; |
752 | } | |
753 | } | |
754 | ||
555cbb32 | 755 | s->s3.empty_fragment_done = 1; |
0f113f3e MC |
756 | } |
757 | ||
50ec7505 BP |
758 | if (BIO_get_ktls_send(s->wbio)) { |
759 | /* | |
760 | * ktls doesn't modify the buffer, but to avoid a warning we need to | |
761 | * discard the const qualifier. | |
762 | * This doesn't leak memory because the buffers have been released when | |
763 | * switching to ktls. | |
764 | */ | |
765 | SSL3_BUFFER_set_buf(&s->rlayer.wbuf[0], (unsigned char *)buf); | |
766 | SSL3_BUFFER_set_offset(&s->rlayer.wbuf[0], 0); | |
767 | goto wpacket_init_complete; | |
768 | } | |
769 | ||
0f113f3e | 770 | if (create_empty_fragment) { |
d102d9df | 771 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 772 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
773 | /* |
774 | * extra fragment would be couple of cipher blocks, which would be | |
775 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
8483a003 | 776 | * payload, then we can just pretend we simply have two headers. |
0f113f3e | 777 | */ |
f4bd5de5 | 778 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
753be41d | 779 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 780 | #endif |
747e1639 | 781 | SSL3_BUFFER_set_offset(wb, align); |
c7c42022 MC |
782 | if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), |
783 | SSL3_BUFFER_get_len(wb), 0) | |
784 | || !WPACKET_allocate_bytes(&pkt[0], align, NULL)) { | |
c2853382 MC |
785 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
786 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
787 | goto err; |
788 | } | |
789 | wpinited = 1; | |
0f113f3e | 790 | } else if (prefix_len) { |
d102d9df | 791 | wb = &s->rlayer.wbuf[0]; |
44e58f3b MC |
792 | if (!WPACKET_init_static_len(&pkt[0], |
793 | SSL3_BUFFER_get_buf(wb), | |
c7c42022 MC |
794 | SSL3_BUFFER_get_len(wb), 0) |
795 | || !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb) | |
796 | + prefix_len, NULL)) { | |
c2853382 MC |
797 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
798 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
799 | goto err; |
800 | } | |
801 | wpinited = 1; | |
0f113f3e | 802 | } else { |
a230b26e | 803 | for (j = 0; j < numpipes; j++) { |
44e58f3b MC |
804 | thispkt = &pkt[j]; |
805 | ||
d102d9df | 806 | wb = &s->rlayer.wbuf[j]; |
829754a6 | 807 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
d102d9df | 808 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
753be41d | 809 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 810 | #endif |
d102d9df | 811 | SSL3_BUFFER_set_offset(wb, align); |
44e58f3b | 812 | if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), |
c7c42022 | 813 | SSL3_BUFFER_get_len(wb), 0) |
44e58f3b | 814 | || !WPACKET_allocate_bytes(thispkt, align, NULL)) { |
c2853382 MC |
815 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
816 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
817 | goto err; |
818 | } | |
819 | wpinited++; | |
d102d9df | 820 | } |
0f113f3e MC |
821 | } |
822 | ||
0f113f3e | 823 | /* Explicit IV length, block ciphers appropriate version flag */ |
49e7fe12 | 824 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s) && !SSL_TREAT_AS_TLS13(s)) { |
0f113f3e MC |
825 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); |
826 | if (mode == EVP_CIPH_CBC_MODE) { | |
7ee8627f | 827 | /* TODO(size_t): Convert me */ |
0f113f3e MC |
828 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); |
829 | if (eivlen <= 1) | |
830 | eivlen = 0; | |
c7c42022 MC |
831 | } else if (mode == EVP_CIPH_GCM_MODE) { |
832 | /* Need explicit part of IV for GCM mode */ | |
0f113f3e | 833 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 834 | } else if (mode == EVP_CIPH_CCM_MODE) { |
e75c5a79 | 835 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 836 | } |
c7c42022 | 837 | } |
0f113f3e | 838 | |
50ec7505 BP |
839 | wpacket_init_complete: |
840 | ||
d102d9df MC |
841 | totlen = 0; |
842 | /* Clear our SSL3_RECORD structures */ | |
cbe29648 | 843 | memset(wr, 0, sizeof(wr)); |
a230b26e | 844 | for (j = 0; j < numpipes; j++) { |
de9e884b MC |
845 | unsigned int version = (s->version == TLS1_3_VERSION) ? TLS1_2_VERSION |
846 | : s->version; | |
e8eb224b | 847 | unsigned char *compressdata = NULL; |
c7c42022 | 848 | size_t maxcomplen; |
e60ce9c4 | 849 | unsigned int rectype; |
0f113f3e | 850 | |
44e58f3b MC |
851 | thispkt = &pkt[j]; |
852 | thiswr = &wr[j]; | |
853 | ||
e60ce9c4 MC |
854 | /* |
855 | * In TLSv1.3, once encrypting, we always use application data for the | |
856 | * record type | |
857 | */ | |
7426cd34 MC |
858 | if (SSL_TREAT_AS_TLS13(s) |
859 | && s->enc_write_ctx != NULL | |
860 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
861 | || type != SSL3_RT_ALERT)) | |
e60ce9c4 MC |
862 | rectype = SSL3_RT_APPLICATION_DATA; |
863 | else | |
864 | rectype = type; | |
3295d242 MC |
865 | SSL3_RECORD_set_type(thiswr, rectype); |
866 | ||
d102d9df | 867 | /* |
8483a003 | 868 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
869 | * and record version number > TLS 1.0 |
870 | */ | |
871 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
5f7470df MC |
872 | && !s->renegotiate |
873 | && TLS1_get_version(s) > TLS1_VERSION | |
874 | && s->hello_retry_request == SSL_HRR_NONE) | |
c7c42022 | 875 | version = TLS1_VERSION; |
3295d242 | 876 | SSL3_RECORD_set_rec_version(thiswr, version); |
0f113f3e | 877 | |
44e58f3b MC |
878 | maxcomplen = pipelens[j]; |
879 | if (s->compress != NULL) | |
f33f9dde | 880 | maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
44e58f3b | 881 | |
50ec7505 BP |
882 | /* |
883 | * When using offload kernel will write the header. | |
884 | * Otherwise write the header now | |
885 | */ | |
886 | if (!BIO_get_ktls_send(s->wbio) | |
887 | && (!WPACKET_put_bytes_u8(thispkt, rectype) | |
44e58f3b MC |
888 | || !WPACKET_put_bytes_u16(thispkt, version) |
889 | || !WPACKET_start_sub_packet_u16(thispkt) | |
c7c42022 | 890 | || (eivlen > 0 |
44e58f3b | 891 | && !WPACKET_allocate_bytes(thispkt, eivlen, NULL)) |
c7c42022 | 892 | || (maxcomplen > 0 |
44e58f3b | 893 | && !WPACKET_reserve_bytes(thispkt, maxcomplen, |
50ec7505 | 894 | &compressdata)))) { |
c2853382 MC |
895 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
896 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
897 | goto err; |
898 | } | |
0f113f3e | 899 | |
d102d9df | 900 | /* lets setup the record stuff. */ |
44e58f3b MC |
901 | SSL3_RECORD_set_data(thiswr, compressdata); |
902 | SSL3_RECORD_set_length(thiswr, pipelens[j]); | |
903 | SSL3_RECORD_set_input(thiswr, (unsigned char *)&buf[totlen]); | |
d102d9df | 904 | totlen += pipelens[j]; |
0f113f3e | 905 | |
d102d9df | 906 | /* |
44e58f3b MC |
907 | * we now 'read' from thiswr->input, thiswr->length bytes into |
908 | * thiswr->data | |
d102d9df | 909 | */ |
0f113f3e | 910 | |
d102d9df MC |
911 | /* first we compress */ |
912 | if (s->compress != NULL) { | |
44e58f3b MC |
913 | if (!ssl3_do_compress(s, thiswr) |
914 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { | |
c2853382 MC |
915 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
916 | SSL_R_COMPRESSION_FAILURE); | |
d102d9df MC |
917 | goto err; |
918 | } | |
919 | } else { | |
50ec7505 BP |
920 | if (BIO_get_ktls_send(s->wbio)) { |
921 | SSL3_RECORD_reset_data(&wr[j]); | |
922 | } else { | |
923 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { | |
924 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
925 | ERR_R_INTERNAL_ERROR); | |
926 | goto err; | |
927 | } | |
928 | SSL3_RECORD_reset_input(&wr[j]); | |
c7c42022 | 929 | } |
d102d9df | 930 | } |
0f113f3e | 931 | |
7426cd34 MC |
932 | if (SSL_TREAT_AS_TLS13(s) |
933 | && s->enc_write_ctx != NULL | |
934 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
935 | || type != SSL3_RT_ALERT)) { | |
cf72c757 | 936 | size_t rlen, max_send_fragment; |
c649d10d | 937 | |
44e58f3b | 938 | if (!WPACKET_put_bytes_u8(thispkt, type)) { |
c2853382 MC |
939 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
940 | ERR_R_INTERNAL_ERROR); | |
e60ce9c4 MC |
941 | goto err; |
942 | } | |
44e58f3b | 943 | SSL3_RECORD_add_length(thiswr, 1); |
c649d10d TS |
944 | |
945 | /* Add TLS1.3 padding */ | |
cf72c757 | 946 | max_send_fragment = ssl_get_max_send_fragment(s); |
96c9aee2 | 947 | rlen = SSL3_RECORD_get_length(thiswr); |
cf72c757 | 948 | if (rlen < max_send_fragment) { |
96c9aee2 | 949 | size_t padding = 0; |
cf72c757 | 950 | size_t max_padding = max_send_fragment - rlen; |
96c9aee2 TS |
951 | if (s->record_padding_cb != NULL) { |
952 | padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg); | |
953 | } else if (s->block_padding > 0) { | |
954 | size_t mask = s->block_padding - 1; | |
955 | size_t remainder; | |
956 | ||
957 | /* optimize for power of 2 */ | |
958 | if ((s->block_padding & mask) == 0) | |
959 | remainder = rlen & mask; | |
960 | else | |
961 | remainder = rlen % s->block_padding; | |
962 | /* don't want to add a block of padding if we don't have to */ | |
963 | if (remainder == 0) | |
964 | padding = 0; | |
965 | else | |
966 | padding = s->block_padding - remainder; | |
967 | } | |
968 | if (padding > 0) { | |
969 | /* do not allow the record to exceed max plaintext length */ | |
970 | if (padding > max_padding) | |
971 | padding = max_padding; | |
972 | if (!WPACKET_memset(thispkt, 0, padding)) { | |
c2853382 MC |
973 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
974 | ERR_R_INTERNAL_ERROR); | |
96c9aee2 TS |
975 | goto err; |
976 | } | |
977 | SSL3_RECORD_add_length(thiswr, padding); | |
c649d10d | 978 | } |
c649d10d | 979 | } |
e60ce9c4 MC |
980 | } |
981 | ||
0f113f3e | 982 | /* |
44e58f3b MC |
983 | * we should still have the output to thiswr->data and the input from |
984 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
985 | * in the wb->buf | |
0f113f3e | 986 | */ |
0f113f3e | 987 | |
28a31a0a | 988 | if (!SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
989 | unsigned char *mac; |
990 | ||
44e58f3b MC |
991 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
992 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c2853382 MC |
993 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
994 | ERR_R_INTERNAL_ERROR); | |
d102d9df | 995 | goto err; |
c7c42022 MC |
996 | } |
997 | } | |
998 | ||
999 | /* | |
1000 | * Reserve some bytes for any growth that may occur during encryption. | |
1001 | * This will be at most one cipher block or the tag length if using | |
1002 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
1003 | */ | |
50ec7505 BP |
1004 | if (!BIO_get_ktls_send(s->wbio)) { |
1005 | if (!WPACKET_reserve_bytes(thispkt, | |
1006 | SSL_RT_MAX_CIPHER_BLOCK_SIZE, | |
1007 | NULL) | |
1008 | /* | |
1009 | * We also need next the amount of bytes written to this | |
1010 | * sub-packet | |
1011 | */ | |
44e58f3b | 1012 | || !WPACKET_get_length(thispkt, &len)) { |
c2853382 MC |
1013 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1014 | ERR_R_INTERNAL_ERROR); | |
c7c42022 | 1015 | goto err; |
50ec7505 | 1016 | } |
c7c42022 | 1017 | |
50ec7505 BP |
1018 | /* Get a pointer to the start of this record excluding header */ |
1019 | recordstart = WPACKET_get_curr(thispkt) - len; | |
1020 | SSL3_RECORD_set_data(thiswr, recordstart); | |
1021 | SSL3_RECORD_reset_input(thiswr); | |
1022 | SSL3_RECORD_set_length(thiswr, len); | |
1023 | } | |
0f113f3e MC |
1024 | } |
1025 | ||
7426cd34 | 1026 | if (s->statem.enc_write_state == ENC_WRITE_STATE_WRITE_PLAIN_ALERTS) { |
49e7fe12 MC |
1027 | /* |
1028 | * We haven't actually negotiated the version yet, but we're trying to | |
3519bae5 | 1029 | * send early data - so we need to use the tls13enc function. |
49e7fe12 | 1030 | */ |
c2853382 | 1031 | if (tls13_enc(s, wr, numpipes, 1) < 1) { |
921d84a0 MC |
1032 | if (!ossl_statem_in_error(s)) { |
1033 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
1034 | ERR_R_INTERNAL_ERROR); | |
1035 | } | |
49e7fe12 | 1036 | goto err; |
c2853382 | 1037 | } |
49e7fe12 | 1038 | } else { |
50ec7505 BP |
1039 | if (!BIO_get_ktls_send(s->wbio)) { |
1040 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) { | |
1041 | if (!ossl_statem_in_error(s)) { | |
1042 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
1043 | ERR_R_INTERNAL_ERROR); | |
1044 | } | |
1045 | goto err; | |
921d84a0 | 1046 | } |
c2853382 | 1047 | } |
49e7fe12 | 1048 | } |
0f113f3e | 1049 | |
a230b26e | 1050 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
1051 | size_t origlen; |
1052 | ||
44e58f3b MC |
1053 | thispkt = &pkt[j]; |
1054 | thiswr = &wr[j]; | |
1055 | ||
50ec7505 BP |
1056 | if (BIO_get_ktls_send(s->wbio)) |
1057 | goto mac_done; | |
1058 | ||
c7c42022 | 1059 | /* Allocate bytes for the encryption overhead */ |
44e58f3b | 1060 | if (!WPACKET_get_length(thispkt, &origlen) |
c7c42022 | 1061 | /* Encryption should never shrink the data! */ |
44e58f3b MC |
1062 | || origlen > thiswr->length |
1063 | || (thiswr->length > origlen | |
1064 | && !WPACKET_allocate_bytes(thispkt, | |
50ec7505 BP |
1065 | thiswr->length - origlen, |
1066 | NULL))) { | |
c2853382 MC |
1067 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1068 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1069 | goto err; |
1070 | } | |
28a31a0a | 1071 | if (SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
1072 | unsigned char *mac; |
1073 | ||
44e58f3b MC |
1074 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
1075 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c2853382 MC |
1076 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1077 | ERR_R_INTERNAL_ERROR); | |
d102d9df | 1078 | goto err; |
c7c42022 | 1079 | } |
44e58f3b | 1080 | SSL3_RECORD_add_length(thiswr, mac_size); |
d102d9df | 1081 | } |
0f113f3e | 1082 | |
44e58f3b MC |
1083 | if (!WPACKET_get_length(thispkt, &len) |
1084 | || !WPACKET_close(thispkt)) { | |
c2853382 MC |
1085 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1086 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1087 | goto err; |
1088 | } | |
d102d9df | 1089 | |
c7c42022 | 1090 | if (s->msg_callback) { |
44e58f3b | 1091 | recordstart = WPACKET_get_curr(thispkt) - len |
c7c42022 MC |
1092 | - SSL3_RT_HEADER_LENGTH; |
1093 | s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, | |
1094 | SSL3_RT_HEADER_LENGTH, s, | |
d102d9df | 1095 | s->msg_callback_arg); |
ad5100bc MC |
1096 | |
1097 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { | |
1098 | unsigned char ctype = type; | |
1099 | ||
1100 | s->msg_callback(1, s->version, SSL3_RT_INNER_CONTENT_TYPE, | |
1101 | &ctype, 1, s, s->msg_callback_arg); | |
1102 | } | |
c7c42022 MC |
1103 | } |
1104 | ||
44e58f3b | 1105 | if (!WPACKET_finish(thispkt)) { |
c2853382 MC |
1106 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1107 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1108 | goto err; |
1109 | } | |
0f113f3e | 1110 | |
50ec7505 BP |
1111 | /* header is added by the kernel when using offload */ |
1112 | SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); | |
d102d9df MC |
1113 | |
1114 | if (create_empty_fragment) { | |
1115 | /* | |
1116 | * we are in a recursive call; just return the length, don't write | |
1117 | * out anything here | |
1118 | */ | |
1119 | if (j > 0) { | |
1120 | /* We should never be pipelining an empty fragment!! */ | |
c2853382 MC |
1121 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1122 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
1123 | goto err; |
1124 | } | |
44e58f3b | 1125 | *written = SSL3_RECORD_get_length(thiswr); |
7ee8627f | 1126 | return 1; |
d102d9df MC |
1127 | } |
1128 | ||
50ec7505 BP |
1129 | mac_done: |
1130 | /* | |
1131 | * we should now have thiswr->data pointing to the encrypted data, which | |
1132 | * is thiswr->length long | |
1133 | */ | |
1134 | SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for | |
1135 | * debugging */ | |
1136 | ||
d102d9df MC |
1137 | /* now let's set up wb */ |
1138 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
44e58f3b | 1139 | prefix_len + SSL3_RECORD_get_length(thiswr)); |
0f113f3e MC |
1140 | } |
1141 | ||
0f113f3e MC |
1142 | /* |
1143 | * memorize arguments so that ssl3_write_pending can detect bad write | |
1144 | * retries later | |
1145 | */ | |
d102d9df | 1146 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
1147 | s->rlayer.wpend_buf = buf; |
1148 | s->rlayer.wpend_type = type; | |
d102d9df | 1149 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
1150 | |
1151 | /* we now just need to write the buffer */ | |
7ee8627f | 1152 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e | 1153 | err: |
c7c42022 MC |
1154 | for (j = 0; j < wpinited; j++) |
1155 | WPACKET_cleanup(&pkt[j]); | |
0f113f3e MC |
1156 | return -1; |
1157 | } | |
d02b48c6 | 1158 | |
555cbb32 | 1159 | /* if s->s3.wbuf.left != 0, we need to call this |
4880672a | 1160 | * |
beacb0f0 | 1161 | * Return values are as per SSL_write() |
4880672a | 1162 | */ |
7ee8627f MC |
1163 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, |
1164 | size_t *written) | |
0f113f3e MC |
1165 | { |
1166 | int i; | |
d102d9df | 1167 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
7ee8627f | 1168 | size_t currbuf = 0; |
f0ca8f89 | 1169 | size_t tmpwrit = 0; |
d02b48c6 | 1170 | |
7ee8627f | 1171 | if ((s->rlayer.wpend_tot > len) |
ebc20cfa BE |
1172 | || (!(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER) |
1173 | && (s->rlayer.wpend_buf != buf)) | |
f8caa3c8 | 1174 | || (s->rlayer.wpend_type != type)) { |
c2853382 MC |
1175 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING, |
1176 | SSL_R_BAD_WRITE_RETRY); | |
7ee8627f | 1177 | return -1; |
0f113f3e MC |
1178 | } |
1179 | ||
1180 | for (;;) { | |
d102d9df MC |
1181 | /* Loop until we find a buffer we haven't written out yet */ |
1182 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 1183 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
1184 | currbuf++; |
1185 | continue; | |
1186 | } | |
0f113f3e MC |
1187 | clear_sys_error(); |
1188 | if (s->wbio != NULL) { | |
1189 | s->rwstate = SSL_WRITING; | |
50ec7505 BP |
1190 | |
1191 | /* | |
1192 | * To prevent coalescing of control and data messages, | |
1193 | * such as in buffer_write, we flush the BIO | |
1194 | */ | |
1195 | if (BIO_get_ktls_send(s->wbio) && type != SSL3_RT_APPLICATION_DATA) { | |
1196 | i = BIO_flush(s->wbio); | |
1197 | if (i <= 0) | |
1198 | return i; | |
1199 | } | |
1200 | ||
1201 | if (BIO_get_ktls_send(s->wbio) | |
1202 | && type != SSL3_RT_APPLICATION_DATA) { | |
1203 | BIO_set_ktls_ctrl_msg(s->wbio, type); | |
1204 | } | |
7ee8627f | 1205 | /* TODO(size_t): Convert this call */ |
a230b26e EK |
1206 | i = BIO_write(s->wbio, (char *) |
1207 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
1208 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1209 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
7ee8627f MC |
1210 | if (i >= 0) |
1211 | tmpwrit = i; | |
0f113f3e | 1212 | } else { |
c2853382 MC |
1213 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING, |
1214 | SSL_R_BIO_NOT_SET); | |
0f113f3e MC |
1215 | i = -1; |
1216 | } | |
7ee8627f | 1217 | if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { |
d102d9df | 1218 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
7ee8627f | 1219 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
d102d9df MC |
1220 | if (currbuf + 1 < s->rlayer.numwpipes) |
1221 | continue; | |
0f113f3e | 1222 | s->rwstate = SSL_NOTHING; |
7ee8627f MC |
1223 | *written = s->rlayer.wpend_ret; |
1224 | return 1; | |
0f113f3e | 1225 | } else if (i <= 0) { |
5e8b24db | 1226 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1227 | /* |
1228 | * For DTLS, just drop it. That's kind of the whole point in | |
1229 | * using a datagram service | |
1230 | */ | |
d102d9df | 1231 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 1232 | } |
26a7d938 | 1233 | return i; |
0f113f3e | 1234 | } |
7ee8627f MC |
1235 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
1236 | SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); | |
0f113f3e MC |
1237 | } |
1238 | } | |
d02b48c6 | 1239 | |
1d97c843 TH |
1240 | /*- |
1241 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1242 | * 'type' is one of the following: |
1243 | * | |
1244 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1245 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1246 | * - 0 (during a shutdown, no data has to be returned) | |
1247 | * | |
1248 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1249 | * (possibly multiple records if we still don't have anything to return). | |
1250 | * | |
1251 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1252 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1253 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1254 | * argument is non NULL. | |
b35e9050 BM |
1255 | * Also if record payloads contain fragments too small to process, we store |
1256 | * them until there is enough for the respective protocol (the record protocol | |
1257 | * may use arbitrary fragmentation and even interleaving): | |
1258 | * Change cipher spec protocol | |
1259 | * just 1 byte needed, no need for keeping anything stored | |
1260 | * Alert protocol | |
1261 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1262 | * Handshake protocol | |
1263 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1264 | * to detect unexpected Client Hello and Hello Request messages | |
1265 | * here, anything else is handled by higher layers | |
1266 | * Application data protocol | |
1267 | * none of our business | |
1268 | */ | |
657da85e | 1269 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
54105ddd | 1270 | size_t len, int peek, size_t *readbytes) |
0f113f3e | 1271 | { |
99dd3740 | 1272 | int i, j, ret; |
54105ddd | 1273 | size_t n, curr_rec, num_recs, totalbytes; |
0f113f3e | 1274 | SSL3_RECORD *rr; |
94777c9c | 1275 | SSL3_BUFFER *rbuf; |
0f113f3e | 1276 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
bcf2907c | 1277 | int is_tls13 = SSL_IS_TLS13(s); |
0f113f3e | 1278 | |
94777c9c MC |
1279 | rbuf = &s->rlayer.rbuf; |
1280 | ||
1281 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1282 | /* Not initialized yet */ |
196f2cbb MC |
1283 | if (!ssl3_setup_read_buffer(s)) { |
1284 | /* SSLfatal() already called */ | |
eda75751 | 1285 | return -1; |
196f2cbb | 1286 | } |
28d59af8 | 1287 | } |
0f113f3e MC |
1288 | |
1289 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1290 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1291 | && (type != | |
1292 | SSL3_RT_APPLICATION_DATA))) { | |
99dd3740 MC |
1293 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1294 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
1295 | return -1; |
1296 | } | |
1297 | ||
4aa7389e | 1298 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1299 | /* (partially) satisfy request from storage */ |
1300 | { | |
4aa7389e | 1301 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1302 | unsigned char *dst = buf; |
1303 | unsigned int k; | |
1304 | ||
1305 | /* peek == 0 */ | |
1306 | n = 0; | |
4aa7389e | 1307 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1308 | *dst++ = *src++; |
1309 | len--; | |
4aa7389e | 1310 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1311 | n++; |
1312 | } | |
1313 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1314 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1315 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1316 | |
1317 | if (recvd_type != NULL) | |
1318 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1319 | ||
54105ddd | 1320 | *readbytes = n; |
eda75751 | 1321 | return 1; |
0f113f3e MC |
1322 | } |
1323 | ||
1324 | /* | |
4aa7389e | 1325 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1326 | */ |
1327 | ||
024f543c | 1328 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1329 | /* type == SSL3_RT_APPLICATION_DATA */ |
1330 | i = s->handshake_func(s); | |
99dd3740 | 1331 | /* SSLfatal() already called */ |
0f113f3e | 1332 | if (i < 0) |
eda75751 | 1333 | return i; |
99dd3740 | 1334 | if (i == 0) |
eda75751 | 1335 | return -1; |
0f113f3e MC |
1336 | } |
1337 | start: | |
1338 | s->rwstate = SSL_NOTHING; | |
1339 | ||
50e735f9 | 1340 | /*- |
94777c9c MC |
1341 | * For each record 'i' up to |num_recs] |
1342 | * rr[i].type - is the type of record | |
1343 | * rr[i].data, - data | |
1344 | * rr[i].off, - offset into 'data' for next read | |
1345 | * rr[i].length, - number of bytes. | |
50e735f9 | 1346 | */ |
94777c9c MC |
1347 | rr = s->rlayer.rrec; |
1348 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1349 | ||
1350 | do { | |
1351 | /* get new records if necessary */ | |
1352 | if (num_recs == 0) { | |
1353 | ret = ssl3_get_record(s); | |
99dd3740 MC |
1354 | if (ret <= 0) { |
1355 | /* SSLfatal() already called if appropriate */ | |
eda75751 | 1356 | return ret; |
99dd3740 | 1357 | } |
94777c9c MC |
1358 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); |
1359 | if (num_recs == 0) { | |
1360 | /* Shouldn't happen */ | |
99dd3740 MC |
1361 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1362 | ERR_R_INTERNAL_ERROR); | |
1363 | return -1; | |
94777c9c MC |
1364 | } |
1365 | } | |
255cfeac | 1366 | /* Skip over any records we have already read */ |
94777c9c | 1367 | for (curr_rec = 0; |
255cfeac | 1368 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1369 | curr_rec++) ; |
94777c9c MC |
1370 | if (curr_rec == num_recs) { |
1371 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1372 | num_recs = 0; | |
1373 | curr_rec = 0; | |
1374 | } | |
1375 | } while (num_recs == 0); | |
1376 | rr = &rr[curr_rec]; | |
0f113f3e | 1377 | |
3d35e3a2 MC |
1378 | if (s->rlayer.handshake_fragment_len > 0 |
1379 | && SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE | |
1380 | && SSL_IS_TLS13(s)) { | |
1381 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, | |
1382 | SSL_R_MIXED_HANDSHAKE_AND_NON_HANDSHAKE_DATA); | |
1383 | return -1; | |
1384 | } | |
1385 | ||
af58be76 MC |
1386 | /* |
1387 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1388 | * record that isn't an alert. | |
1389 | */ | |
1390 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1391 | && SSL3_RECORD_get_length(rr) != 0) | |
1392 | s->rlayer.alert_count = 0; | |
1393 | ||
0f113f3e MC |
1394 | /* we now have a packet which can be read and processed */ |
1395 | ||
555cbb32 TS |
1396 | if (s->s3.change_cipher_spec /* set when we receive ChangeCipherSpec, |
1397 | * reset by ssl3_get_finished */ | |
747e1639 | 1398 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
99dd3740 MC |
1399 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1400 | SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1401 | return -1; | |
0f113f3e MC |
1402 | } |
1403 | ||
1404 | /* | |
1405 | * If the other end has shut down, throw anything we read away (even in | |
1406 | * 'peek' mode) | |
1407 | */ | |
1408 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1409 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e | 1410 | s->rwstate = SSL_NOTHING; |
eda75751 | 1411 | return 0; |
0f113f3e MC |
1412 | } |
1413 | ||
657da85e | 1414 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e | 1415 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
97997489 | 1416 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL |
bcf2907c | 1417 | && !is_tls13)) { |
657da85e MC |
1418 | /* |
1419 | * SSL3_RT_APPLICATION_DATA or | |
1420 | * SSL3_RT_HANDSHAKE or | |
1421 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1422 | */ | |
0f113f3e MC |
1423 | /* |
1424 | * make sure that we are not getting application data when we are | |
1425 | * doing a handshake for the first time | |
1426 | */ | |
1427 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1428 | (s->enc_read_ctx == NULL)) { | |
99dd3740 MC |
1429 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1430 | SSL_R_APP_DATA_IN_HANDSHAKE); | |
1431 | return -1; | |
0f113f3e MC |
1432 | } |
1433 | ||
657da85e | 1434 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1435 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1436 | && s->rlayer.handshake_fragment_len > 0) { | |
99dd3740 MC |
1437 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1438 | SSL_R_CCS_RECEIVED_EARLY); | |
1439 | return -1; | |
657da85e MC |
1440 | } |
1441 | ||
1442 | if (recvd_type != NULL) | |
1443 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1444 | ||
1c47d35a MC |
1445 | if (len == 0) { |
1446 | /* | |
1447 | * Mark a zero length record as read. This ensures multiple calls to | |
1448 | * SSL_read() with a zero length buffer will eventually cause | |
1449 | * SSL_pending() to report data as being available. | |
1450 | */ | |
1451 | if (SSL3_RECORD_get_length(rr) == 0) | |
1452 | SSL3_RECORD_set_read(rr); | |
eda75751 | 1453 | return 0; |
1c47d35a | 1454 | } |
0f113f3e | 1455 | |
54105ddd | 1456 | totalbytes = 0; |
94777c9c | 1457 | do { |
54105ddd | 1458 | if (len - totalbytes > SSL3_RECORD_get_length(rr)) |
94777c9c MC |
1459 | n = SSL3_RECORD_get_length(rr); |
1460 | else | |
54105ddd | 1461 | n = len - totalbytes; |
94777c9c MC |
1462 | |
1463 | memcpy(buf, &(rr->data[rr->off]), n); | |
1464 | buf += n; | |
b8d24395 MC |
1465 | if (peek) { |
1466 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1467 | if (SSL3_RECORD_get_length(rr) == 0) | |
1468 | SSL3_RECORD_set_read(rr); | |
1469 | } else { | |
753be41d | 1470 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1471 | SSL3_RECORD_add_off(rr, n); |
1472 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1473 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1474 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1475 | SSL3_RECORD_set_read(rr); |
94777c9c | 1476 | } |
0f113f3e | 1477 | } |
94777c9c MC |
1478 | if (SSL3_RECORD_get_length(rr) == 0 |
1479 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1480 | curr_rec++; | |
1481 | rr++; | |
1482 | } | |
54105ddd | 1483 | totalbytes += n; |
94777c9c | 1484 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs |
54105ddd MC |
1485 | && totalbytes < len); |
1486 | if (totalbytes == 0) { | |
255cfeac MC |
1487 | /* We must have read empty records. Get more data */ |
1488 | goto start; | |
1489 | } | |
94777c9c | 1490 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1491 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1492 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c | 1493 | ssl3_release_read_buffer(s); |
54105ddd | 1494 | *readbytes = totalbytes; |
eda75751 | 1495 | return 1; |
0f113f3e MC |
1496 | } |
1497 | ||
1498 | /* | |
1499 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1500 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1501 | * were actually expecting a CCS). | |
0f113f3e MC |
1502 | */ |
1503 | ||
32ec4153 MC |
1504 | /* |
1505 | * Lets just double check that we've not got an SSLv2 record | |
1506 | */ | |
1507 | if (rr->rec_version == SSL2_VERSION) { | |
1508 | /* | |
1509 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1510 | * record back if this is the first packet and we are looking for an | |
1511 | * initial ClientHello. Therefore |type| should always be equal to | |
1512 | * |rr->type|. If not then something has gone horribly wrong | |
1513 | */ | |
99dd3740 MC |
1514 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1515 | ERR_R_INTERNAL_ERROR); | |
1516 | return -1; | |
32ec4153 MC |
1517 | } |
1518 | ||
e8aa8b6c | 1519 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1520 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1521 | /* |
1522 | * If we've got this far and still haven't decided on what version | |
558ea847 RL |
1523 | * we're using then this must be a client side alert we're dealing |
1524 | * with. We shouldn't be receiving anything other than a ClientHello | |
1525 | * if we are a server. | |
13c9bb3e MC |
1526 | */ |
1527 | s->version = rr->rec_version; | |
99dd3740 MC |
1528 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1529 | SSL_R_UNEXPECTED_MESSAGE); | |
1530 | return -1; | |
13c9bb3e MC |
1531 | } |
1532 | ||
50e735f9 | 1533 | /*- |
4aa7389e | 1534 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
50e735f9 MC |
1535 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1536 | */ | |
0f113f3e | 1537 | |
bd990e25 MC |
1538 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
1539 | unsigned int alert_level, alert_descr; | |
1540 | unsigned char *alert_bytes = SSL3_RECORD_get_data(rr) | |
1541 | + SSL3_RECORD_get_off(rr); | |
1542 | PACKET alert; | |
1543 | ||
1544 | if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr)) | |
1545 | || !PACKET_get_1(&alert, &alert_level) | |
1546 | || !PACKET_get_1(&alert, &alert_descr) | |
1547 | || PACKET_remaining(&alert) != 0) { | |
99dd3740 MC |
1548 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1549 | SSL_R_INVALID_ALERT); | |
1550 | return -1; | |
bd990e25 | 1551 | } |
0f113f3e MC |
1552 | |
1553 | if (s->msg_callback) | |
bd990e25 | 1554 | s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, |
4aa7389e | 1555 | s->msg_callback_arg); |
0f113f3e MC |
1556 | |
1557 | if (s->info_callback != NULL) | |
1558 | cb = s->info_callback; | |
1559 | else if (s->ctx->info_callback != NULL) | |
1560 | cb = s->ctx->info_callback; | |
1561 | ||
1562 | if (cb != NULL) { | |
1563 | j = (alert_level << 8) | alert_descr; | |
1564 | cb(s, SSL_CB_READ_ALERT, j); | |
1565 | } | |
1566 | ||
bcf2907c MC |
1567 | if (alert_level == SSL3_AL_WARNING |
1568 | || (is_tls13 && alert_descr == SSL_AD_USER_CANCELLED)) { | |
555cbb32 | 1569 | s->s3.warn_alert = alert_descr; |
63916e9a | 1570 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1571 | |
1572 | s->rlayer.alert_count++; | |
1573 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
99dd3740 MC |
1574 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1575 | SSL_R_TOO_MANY_WARN_ALERTS); | |
1576 | return -1; | |
af58be76 | 1577 | } |
4aa5a566 MC |
1578 | } |
1579 | ||
1580 | /* | |
bcf2907c MC |
1581 | * Apart from close_notify the only other warning alert in TLSv1.3 |
1582 | * is user_cancelled - which we just ignore. | |
4aa5a566 | 1583 | */ |
bcf2907c MC |
1584 | if (is_tls13 && alert_descr == SSL_AD_USER_CANCELLED) { |
1585 | goto start; | |
1586 | } else if (alert_descr == SSL_AD_CLOSE_NOTIFY | |
1587 | && (is_tls13 || alert_level == SSL3_AL_WARNING)) { | |
1588 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1589 | return 0; | |
1590 | } else if (alert_level == SSL3_AL_FATAL || is_tls13) { | |
0f113f3e MC |
1591 | char tmp[16]; |
1592 | ||
1593 | s->rwstate = SSL_NOTHING; | |
555cbb32 | 1594 | s->s3.fatal_alert = alert_descr; |
99dd3740 MC |
1595 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_SSL3_READ_BYTES, |
1596 | SSL_AD_REASON_OFFSET + alert_descr); | |
1597 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
0f113f3e MC |
1598 | ERR_add_error_data(2, "SSL alert number ", tmp); |
1599 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1600 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1601 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 1602 | return 0; |
bcf2907c MC |
1603 | } else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { |
1604 | /* | |
1605 | * This is a warning but we receive it if we requested | |
1606 | * renegotiation and the peer denied it. Terminate with a fatal | |
1607 | * alert because if application tried to renegotiate it | |
1608 | * presumably had a good reason and expects it to succeed. In | |
1609 | * future we might have a renegotiation where we don't care if | |
1610 | * the peer refused it where we carry on. | |
1611 | */ | |
1612 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL3_READ_BYTES, | |
1613 | SSL_R_NO_RENEGOTIATION); | |
99dd3740 | 1614 | return -1; |
fee33643 MC |
1615 | } else if (alert_level == SSL3_AL_WARNING) { |
1616 | /* We ignore any other warning alert in TLSv1.2 and below */ | |
1617 | goto start; | |
0f113f3e | 1618 | } |
bcf2907c MC |
1619 | |
1620 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL3_READ_BYTES, | |
1621 | SSL_R_UNKNOWN_ALERT_TYPE); | |
1622 | return -1; | |
0f113f3e MC |
1623 | } |
1624 | ||
ba709049 | 1625 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
ba709049 MC |
1626 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
1627 | BIO *rbio; | |
1628 | ||
1bf4cb0f MC |
1629 | /* |
1630 | * We ignore any handshake messages sent to us unless they are | |
1631 | * TLSv1.3 in which case we want to process them. For all other | |
1632 | * handshake messages we can't do anything reasonable with them | |
1633 | * because we are unable to write any response due to having already | |
1634 | * sent close_notify. | |
1635 | */ | |
1636 | if (!SSL_IS_TLS13(s)) { | |
1637 | SSL3_RECORD_set_length(rr, 0); | |
1638 | SSL3_RECORD_set_read(rr); | |
1639 | ||
1640 | if ((s->mode & SSL_MODE_AUTO_RETRY) != 0) | |
1641 | goto start; | |
ba709049 | 1642 | |
1bf4cb0f MC |
1643 | s->rwstate = SSL_READING; |
1644 | rbio = SSL_get_rbio(s); | |
1645 | BIO_clear_retry_flags(rbio); | |
1646 | BIO_set_retry_read(rbio); | |
1647 | return -1; | |
1648 | } | |
358ffa05 MC |
1649 | } else { |
1650 | /* | |
1651 | * The peer is continuing to send application data, but we have | |
1652 | * already sent close_notify. If this was expected we should have | |
1653 | * been called via SSL_read() and this would have been handled | |
1654 | * above. | |
1655 | * No alert sent because we already sent close_notify | |
1656 | */ | |
1bf4cb0f MC |
1657 | SSL3_RECORD_set_length(rr, 0); |
1658 | SSL3_RECORD_set_read(rr); | |
358ffa05 MC |
1659 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_SSL3_READ_BYTES, |
1660 | SSL_R_APPLICATION_DATA_AFTER_CLOSE_NOTIFY); | |
1bf4cb0f | 1661 | return -1; |
ba709049 | 1662 | } |
0f113f3e MC |
1663 | } |
1664 | ||
93f528f3 MC |
1665 | /* |
1666 | * For handshake data we have 'fragment' storage, so fill that so that we | |
1667 | * can process the header at a fixed place. This is done after the | |
1668 | * "SHUTDOWN" code above to avoid filling the fragment storage with data | |
1669 | * that we're just going to discard. | |
1670 | */ | |
1671 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { | |
1672 | size_t dest_maxlen = sizeof(s->rlayer.handshake_fragment); | |
1673 | unsigned char *dest = s->rlayer.handshake_fragment; | |
1674 | size_t *dest_len = &s->rlayer.handshake_fragment_len; | |
1675 | ||
1676 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
1677 | if (SSL3_RECORD_get_length(rr) < n) | |
1678 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
1679 | ||
1680 | /* now move 'n' bytes: */ | |
1681 | memcpy(dest + *dest_len, | |
1682 | SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n); | |
1683 | SSL3_RECORD_add_off(rr, n); | |
1684 | SSL3_RECORD_sub_length(rr, n); | |
1685 | *dest_len += n; | |
1686 | if (SSL3_RECORD_get_length(rr) == 0) | |
1687 | SSL3_RECORD_set_read(rr); | |
1688 | ||
1689 | if (*dest_len < dest_maxlen) | |
1690 | goto start; /* fragment was too small */ | |
1691 | } | |
1692 | ||
747e1639 | 1693 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
99dd3740 MC |
1694 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1695 | SSL_R_CCS_RECEIVED_EARLY); | |
1696 | return -1; | |
0f113f3e MC |
1697 | } |
1698 | ||
1699 | /* | |
c7f47786 | 1700 | * Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or |
0386aad1 | 1701 | * protocol violation) |
0f113f3e | 1702 | */ |
024f543c | 1703 | if ((s->rlayer.handshake_fragment_len >= 4) |
c7f47786 | 1704 | && !ossl_statem_get_in_handshake(s)) { |
39ef7821 MC |
1705 | int ined = (s->early_data_state == SSL_EARLY_DATA_READING); |
1706 | ||
c7f47786 MC |
1707 | /* We found handshake data, so we're going back into init */ |
1708 | ossl_statem_set_in_init(s, 1); | |
1709 | ||
0f113f3e | 1710 | i = s->handshake_func(s); |
99dd3740 | 1711 | /* SSLfatal() already called if appropriate */ |
0f113f3e | 1712 | if (i < 0) |
eda75751 | 1713 | return i; |
0f113f3e | 1714 | if (i == 0) { |
eda75751 | 1715 | return -1; |
0f113f3e MC |
1716 | } |
1717 | ||
39ef7821 MC |
1718 | /* |
1719 | * If we were actually trying to read early data and we found a | |
1720 | * handshake message, then we don't want to continue to try and read | |
1721 | * the application data any more. It won't be "early" now. | |
1722 | */ | |
1723 | if (ined) | |
1724 | return -1; | |
1725 | ||
0f113f3e | 1726 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { |
94777c9c | 1727 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1728 | /* no read-ahead left? */ |
0f113f3e MC |
1729 | BIO *bio; |
1730 | /* | |
1731 | * In the case where we try to read application data, but we | |
1732 | * trigger an SSL handshake, we return -1 with the retry | |
1733 | * option set. Otherwise renegotiation may cause nasty | |
1734 | * problems in the blocking world | |
1735 | */ | |
1736 | s->rwstate = SSL_READING; | |
1737 | bio = SSL_get_rbio(s); | |
1738 | BIO_clear_retry_flags(bio); | |
1739 | BIO_set_retry_read(bio); | |
eda75751 | 1740 | return -1; |
0f113f3e MC |
1741 | } |
1742 | } | |
1743 | goto start; | |
1744 | } | |
1745 | ||
747e1639 | 1746 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1747 | default: |
0f113f3e | 1748 | /* |
436a2a01 MC |
1749 | * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but |
1750 | * TLS 1.2 says you MUST send an unexpected message alert. We use the | |
1751 | * TLS 1.2 behaviour for all protocol versions to prevent issues where | |
1752 | * no progress is being made and the peer continually sends unrecognised | |
1753 | * record types, using up resources processing them. | |
0f113f3e | 1754 | */ |
99dd3740 MC |
1755 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1756 | SSL_R_UNEXPECTED_RECORD); | |
1757 | return -1; | |
0f113f3e MC |
1758 | case SSL3_RT_CHANGE_CIPHER_SPEC: |
1759 | case SSL3_RT_ALERT: | |
1760 | case SSL3_RT_HANDSHAKE: | |
1761 | /* | |
1762 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1763 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1764 | * that should not happen when type != rr->type | |
0f113f3e | 1765 | */ |
99dd3740 MC |
1766 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1767 | ERR_R_INTERNAL_ERROR); | |
1768 | return -1; | |
0f113f3e MC |
1769 | case SSL3_RT_APPLICATION_DATA: |
1770 | /* | |
1771 | * At this point, we were expecting handshake data, but have | |
1772 | * application data. If the library was running inside ssl3_read() | |
1773 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1774 | * application data at this point (session renegotiation not yet | |
1775 | * started), we will indulge it. | |
1776 | */ | |
fe3a3291 | 1777 | if (ossl_statem_app_data_allowed(s)) { |
555cbb32 | 1778 | s->s3.in_read_app_data = 2; |
eda75751 | 1779 | return -1; |
a832b5ef MC |
1780 | } else if (ossl_statem_skip_early_data(s)) { |
1781 | /* | |
1782 | * This can happen after a client sends a CH followed by early_data, | |
1783 | * but the server responds with a HelloRetryRequest. The server | |
1784 | * reads the next record from the client expecting to find a | |
1785 | * plaintext ClientHello but gets a record which appears to be | |
1786 | * application data. The trial decrypt "works" because null | |
1787 | * decryption was applied. We just skip it and move on to the next | |
1788 | * record. | |
1789 | */ | |
1790 | if (!early_data_count_ok(s, rr->length, | |
196f2cbb MC |
1791 | EARLY_DATA_CIPHERTEXT_OVERHEAD, 0)) { |
1792 | /* SSLfatal() already called */ | |
99dd3740 | 1793 | return -1; |
196f2cbb | 1794 | } |
a832b5ef MC |
1795 | SSL3_RECORD_set_read(rr); |
1796 | goto start; | |
0f113f3e | 1797 | } else { |
99dd3740 MC |
1798 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1799 | SSL_R_UNEXPECTED_RECORD); | |
1800 | return -1; | |
0f113f3e MC |
1801 | } |
1802 | } | |
0f113f3e | 1803 | } |
d02b48c6 | 1804 | |
14daae5a MC |
1805 | void ssl3_record_sequence_update(unsigned char *seq) |
1806 | { | |
1807 | int i; | |
1808 | ||
1809 | for (i = 7; i >= 0; i--) { | |
1810 | ++seq[i]; | |
1811 | if (seq[i] != 0) | |
1812 | break; | |
1813 | } | |
1814 | } | |
1815 | ||
d45ba43d MC |
1816 | /* |
1817 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1818 | * format and false otherwise. | |
1819 | */ | |
32ec4153 MC |
1820 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1821 | { | |
94777c9c | 1822 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1823 | } |
0f113f3e | 1824 | |
d45ba43d MC |
1825 | /* |
1826 | * Returns the length in bytes of the current rrec | |
1827 | */ | |
eda75751 | 1828 | size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1829 | { |
94777c9c | 1830 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1831 | } |