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Commit | Line | Data |
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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> |
999005e4 | 13 | #include "../ssl_locl.h" |
ec577822 BM |
14 | #include <openssl/evp.h> |
15 | #include <openssl/buffer.h> | |
637f374a | 16 | #include <openssl/rand.h> |
c99c4c11 | 17 | #include "record_locl.h" |
bd990e25 | 18 | #include "../packet_locl.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 | ||
59cebcf9 MC |
380 | /* |
381 | * When writing early data on the server side we could be "in_init" in | |
382 | * between receiving the EoED and the CF - but we don't want to handle those | |
383 | * messages yet. | |
384 | */ | |
385 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s) | |
386 | && s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) { | |
1c2e5d56 | 387 | i = s->handshake_func(s); |
c2853382 | 388 | /* SSLfatal() already called */ |
1c2e5d56 | 389 | if (i < 0) |
7ee8627f | 390 | return i; |
1c2e5d56 | 391 | if (i == 0) { |
1c2e5d56 MC |
392 | return -1; |
393 | } | |
0f113f3e MC |
394 | } |
395 | ||
396 | /* | |
397 | * first check if there is a SSL3_BUFFER still being written out. This | |
398 | * will happen with non blocking IO | |
399 | */ | |
400 | if (wb->left != 0) { | |
c2853382 | 401 | /* SSLfatal() already called if appropriate */ |
7ee8627f MC |
402 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, |
403 | &tmpwrit); | |
0f113f3e MC |
404 | if (i <= 0) { |
405 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 406 | s->rlayer.wnum = tot; |
0f113f3e MC |
407 | return i; |
408 | } | |
7ee8627f | 409 | tot += tmpwrit; /* this might be last fragment */ |
0f113f3e | 410 | } |
a9c6edcd | 411 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
412 | /* |
413 | * Depending on platform multi-block can deliver several *times* | |
414 | * better performance. Downside is that it has to allocate | |
8483a003 | 415 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
416 | * compromise is considered worthy. |
417 | */ | |
418 | if (type == SSL3_RT_APPLICATION_DATA && | |
cf72c757 | 419 | len >= 4 * (max_send_fragment = ssl_get_max_send_fragment(s)) && |
0f113f3e | 420 | s->compress == NULL && s->msg_callback == NULL && |
28a31a0a | 421 | !SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && |
846ec07d | 422 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
423 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
424 | unsigned char aad[13]; | |
425 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
8e6d03ca | 426 | size_t packlen; |
e3c9727f | 427 | int packleni; |
0f113f3e MC |
428 | |
429 | /* minimize address aliasing conflicts */ | |
430 | if ((max_send_fragment & 0xfff) == 0) | |
431 | max_send_fragment -= 512; | |
432 | ||
433 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
434 | ssl3_release_write_buffer(s); | |
435 | ||
436 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
437 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
8b0e934a | 438 | (int)max_send_fragment, NULL); |
0f113f3e | 439 | |
7ee8627f | 440 | if (len >= 8 * max_send_fragment) |
0f113f3e MC |
441 | packlen *= 8; |
442 | else | |
443 | packlen *= 4; | |
444 | ||
58c27c20 | 445 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
c2853382 | 446 | /* SSLfatal() already called */ |
918bb865 MC |
447 | return -1; |
448 | } | |
0f113f3e | 449 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
450 | /* free jumbo buffer */ |
451 | ssl3_release_write_buffer(s); | |
8b0e934a MC |
452 | *written = tot; |
453 | return 1; | |
0f113f3e MC |
454 | } |
455 | ||
456 | n = (len - tot); | |
457 | for (;;) { | |
458 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
459 | /* free jumbo buffer */ |
460 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
461 | break; |
462 | } | |
463 | ||
555cbb32 | 464 | if (s->s3.alert_dispatch) { |
0f113f3e MC |
465 | i = s->method->ssl_dispatch_alert(s); |
466 | if (i <= 0) { | |
c2853382 | 467 | /* SSLfatal() already called if appropriate */ |
e2228d31 | 468 | s->rlayer.wnum = tot; |
0f113f3e MC |
469 | return i; |
470 | } | |
471 | } | |
472 | ||
473 | if (n >= 8 * max_send_fragment) | |
474 | nw = max_send_fragment * (mb_param.interleave = 8); | |
475 | else | |
476 | nw = max_send_fragment * (mb_param.interleave = 4); | |
477 | ||
de07f311 | 478 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
479 | aad[8] = type; |
480 | aad[9] = (unsigned char)(s->version >> 8); | |
481 | aad[10] = (unsigned char)(s->version); | |
482 | aad[11] = 0; | |
483 | aad[12] = 0; | |
484 | mb_param.out = NULL; | |
485 | mb_param.inp = aad; | |
486 | mb_param.len = nw; | |
487 | ||
e3c9727f | 488 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, |
0f113f3e MC |
489 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, |
490 | sizeof(mb_param), &mb_param); | |
e3c9727f MC |
491 | packlen = (size_t)packleni; |
492 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
58c27c20 MC |
493 | /* free jumbo buffer */ |
494 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
495 | break; |
496 | } | |
497 | ||
498 | mb_param.out = wb->buf; | |
499 | mb_param.inp = &buf[tot]; | |
500 | mb_param.len = nw; | |
501 | ||
502 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
503 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
504 | sizeof(mb_param), &mb_param) <= 0) | |
505 | return -1; | |
506 | ||
de07f311 MC |
507 | s->rlayer.write_sequence[7] += mb_param.interleave; |
508 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 509 | int j = 6; |
de07f311 | 510 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
511 | } |
512 | ||
513 | wb->offset = 0; | |
514 | wb->left = packlen; | |
515 | ||
f8caa3c8 MC |
516 | s->rlayer.wpend_tot = nw; |
517 | s->rlayer.wpend_buf = &buf[tot]; | |
518 | s->rlayer.wpend_type = type; | |
519 | s->rlayer.wpend_ret = nw; | |
0f113f3e | 520 | |
7ee8627f | 521 | i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); |
0f113f3e | 522 | if (i <= 0) { |
c2853382 | 523 | /* SSLfatal() already called if appropriate */ |
1d2a18dc | 524 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
525 | /* free jumbo buffer */ |
526 | ssl3_release_write_buffer(s); | |
0f113f3e | 527 | } |
e2228d31 | 528 | s->rlayer.wnum = tot; |
0f113f3e MC |
529 | return i; |
530 | } | |
7ee8627f | 531 | if (tmpwrit == n) { |
58c27c20 MC |
532 | /* free jumbo buffer */ |
533 | ssl3_release_write_buffer(s); | |
7ee8627f MC |
534 | *written = tot + tmpwrit; |
535 | return 1; | |
0f113f3e | 536 | } |
7ee8627f MC |
537 | n -= tmpwrit; |
538 | tot += tmpwrit; | |
0f113f3e MC |
539 | } |
540 | } else | |
cf72c757 | 541 | #endif /* !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK */ |
0f113f3e MC |
542 | if (tot == len) { /* done? */ |
543 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
544 | ssl3_release_write_buffer(s); | |
545 | ||
7ee8627f MC |
546 | *written = tot; |
547 | return 1; | |
0f113f3e MC |
548 | } |
549 | ||
550 | n = (len - tot); | |
d102d9df | 551 | |
cf72c757 F |
552 | max_send_fragment = ssl_get_max_send_fragment(s); |
553 | split_send_fragment = ssl_get_split_send_fragment(s); | |
d102d9df MC |
554 | /* |
555 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 556 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
557 | * processing then we also only use 1 pipeline, or if we're not using |
558 | * explicit IVs | |
559 | */ | |
560 | maxpipes = s->max_pipelines; | |
561 | if (maxpipes > SSL_MAX_PIPELINES) { | |
562 | /* | |
563 | * We should have prevented this when we set max_pipelines so we | |
564 | * shouldn't get here | |
a230b26e | 565 | */ |
c2853382 MC |
566 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
567 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
568 | return -1; |
569 | } | |
570 | if (maxpipes == 0 | |
a230b26e EK |
571 | || s->enc_write_ctx == NULL |
572 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
573 | & EVP_CIPH_FLAG_PIPELINE) | |
574 | || !SSL_USE_EXPLICIT_IV(s)) | |
d102d9df | 575 | maxpipes = 1; |
cf72c757 F |
576 | if (max_send_fragment == 0 || split_send_fragment == 0 |
577 | || split_send_fragment > max_send_fragment) { | |
d102d9df | 578 | /* |
cf72c757 | 579 | * We should have prevented this when we set/get the split and max send |
d102d9df | 580 | * fragments so we shouldn't get here |
a230b26e | 581 | */ |
c2853382 MC |
582 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
583 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
584 | return -1; |
585 | } | |
586 | ||
0f113f3e | 587 | for (;;) { |
7ee8627f MC |
588 | size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
589 | size_t numpipes, j; | |
d102d9df MC |
590 | |
591 | if (n == 0) | |
592 | numpipes = 1; | |
0f113f3e | 593 | else |
d102d9df MC |
594 | numpipes = ((n - 1) / split_send_fragment) + 1; |
595 | if (numpipes > maxpipes) | |
596 | numpipes = maxpipes; | |
597 | ||
cf72c757 | 598 | if (n / numpipes >= max_send_fragment) { |
d102d9df MC |
599 | /* |
600 | * We have enough data to completely fill all available | |
601 | * pipelines | |
602 | */ | |
603 | for (j = 0; j < numpipes; j++) { | |
cf72c757 | 604 | pipelens[j] = max_send_fragment; |
d102d9df MC |
605 | } |
606 | } else { | |
607 | /* We can partially fill all available pipelines */ | |
608 | tmppipelen = n / numpipes; | |
609 | remain = n % numpipes; | |
610 | for (j = 0; j < numpipes; j++) { | |
611 | pipelens[j] = tmppipelen; | |
612 | if (j < remain) | |
613 | pipelens[j]++; | |
614 | } | |
615 | } | |
0f113f3e | 616 | |
7ee8627f MC |
617 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0, |
618 | &tmpwrit); | |
0f113f3e | 619 | if (i <= 0) { |
c2853382 | 620 | /* SSLfatal() already called if appropriate */ |
0f113f3e | 621 | /* XXX should we ssl3_release_write_buffer if i<0? */ |
e2228d31 | 622 | s->rlayer.wnum = tot; |
0f113f3e MC |
623 | return i; |
624 | } | |
625 | ||
ff04799d | 626 | if (tmpwrit == n || |
0f113f3e MC |
627 | (type == SSL3_RT_APPLICATION_DATA && |
628 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
629 | /* | |
630 | * next chunk of data should get another prepended empty fragment | |
631 | * in ciphersuites with known-IV weakness: | |
632 | */ | |
555cbb32 | 633 | s->s3.empty_fragment_done = 0; |
0f113f3e MC |
634 | |
635 | if ((i == (int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && | |
636 | !SSL_IS_DTLS(s)) | |
637 | ssl3_release_write_buffer(s); | |
638 | ||
7ee8627f MC |
639 | *written = tot + tmpwrit; |
640 | return 1; | |
0f113f3e MC |
641 | } |
642 | ||
7ee8627f MC |
643 | n -= tmpwrit; |
644 | tot += tmpwrit; | |
0f113f3e MC |
645 | } |
646 | } | |
d02b48c6 | 647 | |
c103c7e2 | 648 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
7ee8627f MC |
649 | size_t *pipelens, size_t numpipes, |
650 | int create_empty_fragment, size_t *written) | |
0f113f3e | 651 | { |
c7c42022 | 652 | WPACKET pkt[SSL_MAX_PIPELINES]; |
d102d9df | 653 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; |
44e58f3b MC |
654 | WPACKET *thispkt; |
655 | SSL3_RECORD *thiswr; | |
c7c42022 | 656 | unsigned char *recordstart; |
0f113f3e | 657 | int i, mac_size, clear = 0; |
7ee8627f | 658 | size_t prefix_len = 0; |
829754a6 | 659 | int eivlen = 0; |
f4bd5de5 | 660 | size_t align = 0; |
d102d9df | 661 | SSL3_BUFFER *wb; |
0f113f3e | 662 | SSL_SESSION *sess; |
c7c42022 | 663 | size_t totlen = 0, len, wpinited = 0; |
7ee8627f | 664 | size_t j; |
0f113f3e | 665 | |
d102d9df MC |
666 | for (j = 0; j < numpipes; j++) |
667 | totlen += pipelens[j]; | |
0f113f3e MC |
668 | /* |
669 | * first check if there is a SSL3_BUFFER still being written out. This | |
670 | * will happen with non blocking IO | |
671 | */ | |
c2853382 MC |
672 | if (RECORD_LAYER_write_pending(&s->rlayer)) { |
673 | /* Calls SSLfatal() as required */ | |
7ee8627f | 674 | return ssl3_write_pending(s, type, buf, totlen, written); |
c2853382 | 675 | } |
0f113f3e MC |
676 | |
677 | /* If we have an alert to send, lets send it */ | |
555cbb32 | 678 | if (s->s3.alert_dispatch) { |
0f113f3e | 679 | i = s->method->ssl_dispatch_alert(s); |
c2853382 MC |
680 | if (i <= 0) { |
681 | /* SSLfatal() already called if appropriate */ | |
26a7d938 | 682 | return i; |
c2853382 | 683 | } |
0f113f3e MC |
684 | /* if it went, fall through and send more stuff */ |
685 | } | |
686 | ||
c2853382 MC |
687 | if (s->rlayer.numwpipes < numpipes) { |
688 | if (!ssl3_setup_write_buffer(s, numpipes, 0)) { | |
689 | /* SSLfatal() already called */ | |
0f113f3e | 690 | return -1; |
c2853382 MC |
691 | } |
692 | } | |
0f113f3e | 693 | |
d102d9df | 694 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
695 | return 0; |
696 | ||
0f113f3e MC |
697 | sess = s->session; |
698 | ||
699 | if ((sess == NULL) || | |
a230b26e | 700 | (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) { |
0f113f3e | 701 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
702 | mac_size = 0; |
703 | } else { | |
7ee8627f | 704 | /* TODO(siz_t): Convert me */ |
0f113f3e | 705 | mac_size = EVP_MD_CTX_size(s->write_hash); |
c2853382 MC |
706 | if (mac_size < 0) { |
707 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
708 | ERR_R_INTERNAL_ERROR); | |
0f113f3e | 709 | goto err; |
c2853382 | 710 | } |
0f113f3e | 711 | } |
d02b48c6 | 712 | |
0f113f3e MC |
713 | /* |
714 | * 'create_empty_fragment' is true only when this function calls itself | |
715 | */ | |
555cbb32 | 716 | if (!clear && !create_empty_fragment && !s->s3.empty_fragment_done) { |
0f113f3e MC |
717 | /* |
718 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
719 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
720 | */ | |
721 | ||
555cbb32 | 722 | if (s->s3.need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { |
0f113f3e MC |
723 | /* |
724 | * recursive function call with 'create_empty_fragment' set; this | |
725 | * prepares and buffers the data for an empty fragment (these | |
726 | * 'prefix_len' bytes are sent out later together with the actual | |
727 | * payload) | |
728 | */ | |
7ee8627f MC |
729 | size_t tmppipelen = 0; |
730 | int ret; | |
d102d9df | 731 | |
7ee8627f | 732 | ret = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1, &prefix_len); |
c2853382 MC |
733 | if (ret <= 0) { |
734 | /* SSLfatal() already called if appropriate */ | |
0f113f3e | 735 | goto err; |
c2853382 | 736 | } |
0f113f3e MC |
737 | |
738 | if (prefix_len > | |
a230b26e | 739 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) { |
0f113f3e | 740 | /* insufficient space */ |
c2853382 MC |
741 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
742 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
743 | goto err; |
744 | } | |
745 | } | |
746 | ||
555cbb32 | 747 | s->s3.empty_fragment_done = 1; |
0f113f3e MC |
748 | } |
749 | ||
50ec7505 BP |
750 | if (BIO_get_ktls_send(s->wbio)) { |
751 | /* | |
752 | * ktls doesn't modify the buffer, but to avoid a warning we need to | |
753 | * discard the const qualifier. | |
754 | * This doesn't leak memory because the buffers have been released when | |
755 | * switching to ktls. | |
756 | */ | |
757 | SSL3_BUFFER_set_buf(&s->rlayer.wbuf[0], (unsigned char *)buf); | |
758 | SSL3_BUFFER_set_offset(&s->rlayer.wbuf[0], 0); | |
759 | goto wpacket_init_complete; | |
760 | } | |
761 | ||
0f113f3e | 762 | if (create_empty_fragment) { |
d102d9df | 763 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 764 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
765 | /* |
766 | * extra fragment would be couple of cipher blocks, which would be | |
767 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
8483a003 | 768 | * payload, then we can just pretend we simply have two headers. |
0f113f3e | 769 | */ |
f4bd5de5 | 770 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
753be41d | 771 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 772 | #endif |
747e1639 | 773 | SSL3_BUFFER_set_offset(wb, align); |
c7c42022 MC |
774 | if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), |
775 | SSL3_BUFFER_get_len(wb), 0) | |
776 | || !WPACKET_allocate_bytes(&pkt[0], align, NULL)) { | |
c2853382 MC |
777 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
778 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
779 | goto err; |
780 | } | |
781 | wpinited = 1; | |
0f113f3e | 782 | } else if (prefix_len) { |
d102d9df | 783 | wb = &s->rlayer.wbuf[0]; |
44e58f3b MC |
784 | if (!WPACKET_init_static_len(&pkt[0], |
785 | SSL3_BUFFER_get_buf(wb), | |
c7c42022 MC |
786 | SSL3_BUFFER_get_len(wb), 0) |
787 | || !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb) | |
788 | + prefix_len, NULL)) { | |
c2853382 MC |
789 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
790 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
791 | goto err; |
792 | } | |
793 | wpinited = 1; | |
0f113f3e | 794 | } else { |
a230b26e | 795 | for (j = 0; j < numpipes; j++) { |
44e58f3b MC |
796 | thispkt = &pkt[j]; |
797 | ||
d102d9df | 798 | wb = &s->rlayer.wbuf[j]; |
829754a6 | 799 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
d102d9df | 800 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
753be41d | 801 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 802 | #endif |
d102d9df | 803 | SSL3_BUFFER_set_offset(wb, align); |
44e58f3b | 804 | if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), |
c7c42022 | 805 | SSL3_BUFFER_get_len(wb), 0) |
44e58f3b | 806 | || !WPACKET_allocate_bytes(thispkt, align, NULL)) { |
c2853382 MC |
807 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
808 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
809 | goto err; |
810 | } | |
811 | wpinited++; | |
d102d9df | 812 | } |
0f113f3e MC |
813 | } |
814 | ||
0f113f3e | 815 | /* Explicit IV length, block ciphers appropriate version flag */ |
49e7fe12 | 816 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s) && !SSL_TREAT_AS_TLS13(s)) { |
0f113f3e MC |
817 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); |
818 | if (mode == EVP_CIPH_CBC_MODE) { | |
7ee8627f | 819 | /* TODO(size_t): Convert me */ |
0f113f3e MC |
820 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); |
821 | if (eivlen <= 1) | |
822 | eivlen = 0; | |
c7c42022 MC |
823 | } else if (mode == EVP_CIPH_GCM_MODE) { |
824 | /* Need explicit part of IV for GCM mode */ | |
0f113f3e | 825 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 826 | } else if (mode == EVP_CIPH_CCM_MODE) { |
e75c5a79 | 827 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 828 | } |
c7c42022 | 829 | } |
0f113f3e | 830 | |
50ec7505 BP |
831 | wpacket_init_complete: |
832 | ||
d102d9df MC |
833 | totlen = 0; |
834 | /* Clear our SSL3_RECORD structures */ | |
cbe29648 | 835 | memset(wr, 0, sizeof(wr)); |
a230b26e | 836 | for (j = 0; j < numpipes; j++) { |
de9e884b MC |
837 | unsigned int version = (s->version == TLS1_3_VERSION) ? TLS1_2_VERSION |
838 | : s->version; | |
e8eb224b | 839 | unsigned char *compressdata = NULL; |
c7c42022 | 840 | size_t maxcomplen; |
e60ce9c4 | 841 | unsigned int rectype; |
0f113f3e | 842 | |
44e58f3b MC |
843 | thispkt = &pkt[j]; |
844 | thiswr = &wr[j]; | |
845 | ||
e60ce9c4 MC |
846 | /* |
847 | * In TLSv1.3, once encrypting, we always use application data for the | |
848 | * record type | |
849 | */ | |
7426cd34 MC |
850 | if (SSL_TREAT_AS_TLS13(s) |
851 | && s->enc_write_ctx != NULL | |
852 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
853 | || type != SSL3_RT_ALERT)) | |
e60ce9c4 MC |
854 | rectype = SSL3_RT_APPLICATION_DATA; |
855 | else | |
856 | rectype = type; | |
3295d242 MC |
857 | SSL3_RECORD_set_type(thiswr, rectype); |
858 | ||
d102d9df | 859 | /* |
8483a003 | 860 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
861 | * and record version number > TLS 1.0 |
862 | */ | |
863 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
5f7470df MC |
864 | && !s->renegotiate |
865 | && TLS1_get_version(s) > TLS1_VERSION | |
866 | && s->hello_retry_request == SSL_HRR_NONE) | |
c7c42022 | 867 | version = TLS1_VERSION; |
3295d242 | 868 | SSL3_RECORD_set_rec_version(thiswr, version); |
0f113f3e | 869 | |
44e58f3b MC |
870 | maxcomplen = pipelens[j]; |
871 | if (s->compress != NULL) | |
f33f9dde | 872 | maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
44e58f3b | 873 | |
50ec7505 BP |
874 | /* |
875 | * When using offload kernel will write the header. | |
876 | * Otherwise write the header now | |
877 | */ | |
878 | if (!BIO_get_ktls_send(s->wbio) | |
879 | && (!WPACKET_put_bytes_u8(thispkt, rectype) | |
44e58f3b MC |
880 | || !WPACKET_put_bytes_u16(thispkt, version) |
881 | || !WPACKET_start_sub_packet_u16(thispkt) | |
c7c42022 | 882 | || (eivlen > 0 |
44e58f3b | 883 | && !WPACKET_allocate_bytes(thispkt, eivlen, NULL)) |
c7c42022 | 884 | || (maxcomplen > 0 |
44e58f3b | 885 | && !WPACKET_reserve_bytes(thispkt, maxcomplen, |
50ec7505 | 886 | &compressdata)))) { |
c2853382 MC |
887 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
888 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
889 | goto err; |
890 | } | |
0f113f3e | 891 | |
d102d9df | 892 | /* lets setup the record stuff. */ |
44e58f3b MC |
893 | SSL3_RECORD_set_data(thiswr, compressdata); |
894 | SSL3_RECORD_set_length(thiswr, pipelens[j]); | |
895 | SSL3_RECORD_set_input(thiswr, (unsigned char *)&buf[totlen]); | |
d102d9df | 896 | totlen += pipelens[j]; |
0f113f3e | 897 | |
d102d9df | 898 | /* |
44e58f3b MC |
899 | * we now 'read' from thiswr->input, thiswr->length bytes into |
900 | * thiswr->data | |
d102d9df | 901 | */ |
0f113f3e | 902 | |
d102d9df MC |
903 | /* first we compress */ |
904 | if (s->compress != NULL) { | |
44e58f3b MC |
905 | if (!ssl3_do_compress(s, thiswr) |
906 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { | |
c2853382 MC |
907 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
908 | SSL_R_COMPRESSION_FAILURE); | |
d102d9df MC |
909 | goto err; |
910 | } | |
911 | } else { | |
50ec7505 BP |
912 | if (BIO_get_ktls_send(s->wbio)) { |
913 | SSL3_RECORD_reset_data(&wr[j]); | |
914 | } else { | |
915 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { | |
916 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
917 | ERR_R_INTERNAL_ERROR); | |
918 | goto err; | |
919 | } | |
920 | SSL3_RECORD_reset_input(&wr[j]); | |
c7c42022 | 921 | } |
d102d9df | 922 | } |
0f113f3e | 923 | |
7426cd34 MC |
924 | if (SSL_TREAT_AS_TLS13(s) |
925 | && s->enc_write_ctx != NULL | |
926 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
927 | || type != SSL3_RT_ALERT)) { | |
cf72c757 | 928 | size_t rlen, max_send_fragment; |
c649d10d | 929 | |
44e58f3b | 930 | if (!WPACKET_put_bytes_u8(thispkt, type)) { |
c2853382 MC |
931 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
932 | ERR_R_INTERNAL_ERROR); | |
e60ce9c4 MC |
933 | goto err; |
934 | } | |
44e58f3b | 935 | SSL3_RECORD_add_length(thiswr, 1); |
c649d10d TS |
936 | |
937 | /* Add TLS1.3 padding */ | |
cf72c757 | 938 | max_send_fragment = ssl_get_max_send_fragment(s); |
96c9aee2 | 939 | rlen = SSL3_RECORD_get_length(thiswr); |
cf72c757 | 940 | if (rlen < max_send_fragment) { |
96c9aee2 | 941 | size_t padding = 0; |
cf72c757 | 942 | size_t max_padding = max_send_fragment - rlen; |
96c9aee2 TS |
943 | if (s->record_padding_cb != NULL) { |
944 | padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg); | |
945 | } else if (s->block_padding > 0) { | |
946 | size_t mask = s->block_padding - 1; | |
947 | size_t remainder; | |
948 | ||
949 | /* optimize for power of 2 */ | |
950 | if ((s->block_padding & mask) == 0) | |
951 | remainder = rlen & mask; | |
952 | else | |
953 | remainder = rlen % s->block_padding; | |
954 | /* don't want to add a block of padding if we don't have to */ | |
955 | if (remainder == 0) | |
956 | padding = 0; | |
957 | else | |
958 | padding = s->block_padding - remainder; | |
959 | } | |
960 | if (padding > 0) { | |
961 | /* do not allow the record to exceed max plaintext length */ | |
962 | if (padding > max_padding) | |
963 | padding = max_padding; | |
964 | if (!WPACKET_memset(thispkt, 0, padding)) { | |
c2853382 MC |
965 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
966 | ERR_R_INTERNAL_ERROR); | |
96c9aee2 TS |
967 | goto err; |
968 | } | |
969 | SSL3_RECORD_add_length(thiswr, padding); | |
c649d10d | 970 | } |
c649d10d | 971 | } |
e60ce9c4 MC |
972 | } |
973 | ||
0f113f3e | 974 | /* |
44e58f3b MC |
975 | * we should still have the output to thiswr->data and the input from |
976 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
977 | * in the wb->buf | |
0f113f3e | 978 | */ |
0f113f3e | 979 | |
28a31a0a | 980 | if (!SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
981 | unsigned char *mac; |
982 | ||
44e58f3b MC |
983 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
984 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c2853382 MC |
985 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
986 | ERR_R_INTERNAL_ERROR); | |
d102d9df | 987 | goto err; |
c7c42022 MC |
988 | } |
989 | } | |
990 | ||
991 | /* | |
992 | * Reserve some bytes for any growth that may occur during encryption. | |
993 | * This will be at most one cipher block or the tag length if using | |
994 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
995 | */ | |
50ec7505 BP |
996 | if (!BIO_get_ktls_send(s->wbio)) { |
997 | if (!WPACKET_reserve_bytes(thispkt, | |
998 | SSL_RT_MAX_CIPHER_BLOCK_SIZE, | |
999 | NULL) | |
1000 | /* | |
1001 | * We also need next the amount of bytes written to this | |
1002 | * sub-packet | |
1003 | */ | |
44e58f3b | 1004 | || !WPACKET_get_length(thispkt, &len)) { |
c2853382 MC |
1005 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1006 | ERR_R_INTERNAL_ERROR); | |
c7c42022 | 1007 | goto err; |
50ec7505 | 1008 | } |
c7c42022 | 1009 | |
50ec7505 BP |
1010 | /* Get a pointer to the start of this record excluding header */ |
1011 | recordstart = WPACKET_get_curr(thispkt) - len; | |
1012 | SSL3_RECORD_set_data(thiswr, recordstart); | |
1013 | SSL3_RECORD_reset_input(thiswr); | |
1014 | SSL3_RECORD_set_length(thiswr, len); | |
1015 | } | |
0f113f3e MC |
1016 | } |
1017 | ||
7426cd34 | 1018 | if (s->statem.enc_write_state == ENC_WRITE_STATE_WRITE_PLAIN_ALERTS) { |
49e7fe12 MC |
1019 | /* |
1020 | * We haven't actually negotiated the version yet, but we're trying to | |
3519bae5 | 1021 | * send early data - so we need to use the tls13enc function. |
49e7fe12 | 1022 | */ |
c2853382 | 1023 | if (tls13_enc(s, wr, numpipes, 1) < 1) { |
921d84a0 MC |
1024 | if (!ossl_statem_in_error(s)) { |
1025 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
1026 | ERR_R_INTERNAL_ERROR); | |
1027 | } | |
49e7fe12 | 1028 | goto err; |
c2853382 | 1029 | } |
49e7fe12 | 1030 | } else { |
50ec7505 BP |
1031 | if (!BIO_get_ktls_send(s->wbio)) { |
1032 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) { | |
1033 | if (!ossl_statem_in_error(s)) { | |
1034 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
1035 | ERR_R_INTERNAL_ERROR); | |
1036 | } | |
1037 | goto err; | |
921d84a0 | 1038 | } |
c2853382 | 1039 | } |
49e7fe12 | 1040 | } |
0f113f3e | 1041 | |
a230b26e | 1042 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
1043 | size_t origlen; |
1044 | ||
44e58f3b MC |
1045 | thispkt = &pkt[j]; |
1046 | thiswr = &wr[j]; | |
1047 | ||
50ec7505 BP |
1048 | if (BIO_get_ktls_send(s->wbio)) |
1049 | goto mac_done; | |
1050 | ||
c7c42022 | 1051 | /* Allocate bytes for the encryption overhead */ |
44e58f3b | 1052 | if (!WPACKET_get_length(thispkt, &origlen) |
c7c42022 | 1053 | /* Encryption should never shrink the data! */ |
44e58f3b MC |
1054 | || origlen > thiswr->length |
1055 | || (thiswr->length > origlen | |
1056 | && !WPACKET_allocate_bytes(thispkt, | |
50ec7505 BP |
1057 | thiswr->length - origlen, |
1058 | NULL))) { | |
c2853382 MC |
1059 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1060 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1061 | goto err; |
1062 | } | |
28a31a0a | 1063 | if (SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
1064 | unsigned char *mac; |
1065 | ||
44e58f3b MC |
1066 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
1067 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c2853382 MC |
1068 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1069 | ERR_R_INTERNAL_ERROR); | |
d102d9df | 1070 | goto err; |
c7c42022 | 1071 | } |
44e58f3b | 1072 | SSL3_RECORD_add_length(thiswr, mac_size); |
d102d9df | 1073 | } |
0f113f3e | 1074 | |
44e58f3b MC |
1075 | if (!WPACKET_get_length(thispkt, &len) |
1076 | || !WPACKET_close(thispkt)) { | |
c2853382 MC |
1077 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1078 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1079 | goto err; |
1080 | } | |
d102d9df | 1081 | |
c7c42022 | 1082 | if (s->msg_callback) { |
44e58f3b | 1083 | recordstart = WPACKET_get_curr(thispkt) - len |
c7c42022 MC |
1084 | - SSL3_RT_HEADER_LENGTH; |
1085 | s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, | |
1086 | SSL3_RT_HEADER_LENGTH, s, | |
d102d9df | 1087 | s->msg_callback_arg); |
ad5100bc MC |
1088 | |
1089 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { | |
1090 | unsigned char ctype = type; | |
1091 | ||
1092 | s->msg_callback(1, s->version, SSL3_RT_INNER_CONTENT_TYPE, | |
1093 | &ctype, 1, s, s->msg_callback_arg); | |
1094 | } | |
c7c42022 MC |
1095 | } |
1096 | ||
44e58f3b | 1097 | if (!WPACKET_finish(thispkt)) { |
c2853382 MC |
1098 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1099 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1100 | goto err; |
1101 | } | |
0f113f3e | 1102 | |
50ec7505 BP |
1103 | /* header is added by the kernel when using offload */ |
1104 | SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); | |
d102d9df MC |
1105 | |
1106 | if (create_empty_fragment) { | |
1107 | /* | |
1108 | * we are in a recursive call; just return the length, don't write | |
1109 | * out anything here | |
1110 | */ | |
1111 | if (j > 0) { | |
1112 | /* We should never be pipelining an empty fragment!! */ | |
c2853382 MC |
1113 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1114 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
1115 | goto err; |
1116 | } | |
44e58f3b | 1117 | *written = SSL3_RECORD_get_length(thiswr); |
7ee8627f | 1118 | return 1; |
d102d9df MC |
1119 | } |
1120 | ||
50ec7505 BP |
1121 | mac_done: |
1122 | /* | |
1123 | * we should now have thiswr->data pointing to the encrypted data, which | |
1124 | * is thiswr->length long | |
1125 | */ | |
1126 | SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for | |
1127 | * debugging */ | |
1128 | ||
d102d9df MC |
1129 | /* now let's set up wb */ |
1130 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
44e58f3b | 1131 | prefix_len + SSL3_RECORD_get_length(thiswr)); |
0f113f3e MC |
1132 | } |
1133 | ||
0f113f3e MC |
1134 | /* |
1135 | * memorize arguments so that ssl3_write_pending can detect bad write | |
1136 | * retries later | |
1137 | */ | |
d102d9df | 1138 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
1139 | s->rlayer.wpend_buf = buf; |
1140 | s->rlayer.wpend_type = type; | |
d102d9df | 1141 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
1142 | |
1143 | /* we now just need to write the buffer */ | |
7ee8627f | 1144 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e | 1145 | err: |
c7c42022 MC |
1146 | for (j = 0; j < wpinited; j++) |
1147 | WPACKET_cleanup(&pkt[j]); | |
0f113f3e MC |
1148 | return -1; |
1149 | } | |
d02b48c6 | 1150 | |
555cbb32 | 1151 | /* if s->s3.wbuf.left != 0, we need to call this |
4880672a | 1152 | * |
beacb0f0 | 1153 | * Return values are as per SSL_write() |
4880672a | 1154 | */ |
7ee8627f MC |
1155 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, |
1156 | size_t *written) | |
0f113f3e MC |
1157 | { |
1158 | int i; | |
d102d9df | 1159 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
7ee8627f | 1160 | size_t currbuf = 0; |
f0ca8f89 | 1161 | size_t tmpwrit = 0; |
d02b48c6 | 1162 | |
7ee8627f | 1163 | if ((s->rlayer.wpend_tot > len) |
ebc20cfa BE |
1164 | || (!(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER) |
1165 | && (s->rlayer.wpend_buf != buf)) | |
f8caa3c8 | 1166 | || (s->rlayer.wpend_type != type)) { |
c2853382 MC |
1167 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING, |
1168 | SSL_R_BAD_WRITE_RETRY); | |
7ee8627f | 1169 | return -1; |
0f113f3e MC |
1170 | } |
1171 | ||
1172 | for (;;) { | |
d102d9df MC |
1173 | /* Loop until we find a buffer we haven't written out yet */ |
1174 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 1175 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
1176 | currbuf++; |
1177 | continue; | |
1178 | } | |
0f113f3e MC |
1179 | clear_sys_error(); |
1180 | if (s->wbio != NULL) { | |
1181 | s->rwstate = SSL_WRITING; | |
50ec7505 BP |
1182 | |
1183 | /* | |
1184 | * To prevent coalescing of control and data messages, | |
1185 | * such as in buffer_write, we flush the BIO | |
1186 | */ | |
1187 | if (BIO_get_ktls_send(s->wbio) && type != SSL3_RT_APPLICATION_DATA) { | |
1188 | i = BIO_flush(s->wbio); | |
1189 | if (i <= 0) | |
1190 | return i; | |
1191 | } | |
1192 | ||
1193 | if (BIO_get_ktls_send(s->wbio) | |
1194 | && type != SSL3_RT_APPLICATION_DATA) { | |
1195 | BIO_set_ktls_ctrl_msg(s->wbio, type); | |
1196 | } | |
7ee8627f | 1197 | /* TODO(size_t): Convert this call */ |
a230b26e EK |
1198 | i = BIO_write(s->wbio, (char *) |
1199 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
1200 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1201 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
7ee8627f MC |
1202 | if (i >= 0) |
1203 | tmpwrit = i; | |
0f113f3e | 1204 | } else { |
c2853382 MC |
1205 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING, |
1206 | SSL_R_BIO_NOT_SET); | |
0f113f3e MC |
1207 | i = -1; |
1208 | } | |
7ee8627f | 1209 | if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { |
d102d9df | 1210 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
7ee8627f | 1211 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
d102d9df MC |
1212 | if (currbuf + 1 < s->rlayer.numwpipes) |
1213 | continue; | |
0f113f3e | 1214 | s->rwstate = SSL_NOTHING; |
7ee8627f MC |
1215 | *written = s->rlayer.wpend_ret; |
1216 | return 1; | |
0f113f3e | 1217 | } else if (i <= 0) { |
5e8b24db | 1218 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1219 | /* |
1220 | * For DTLS, just drop it. That's kind of the whole point in | |
1221 | * using a datagram service | |
1222 | */ | |
d102d9df | 1223 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 1224 | } |
26a7d938 | 1225 | return i; |
0f113f3e | 1226 | } |
7ee8627f MC |
1227 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
1228 | SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); | |
0f113f3e MC |
1229 | } |
1230 | } | |
d02b48c6 | 1231 | |
1d97c843 TH |
1232 | /*- |
1233 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1234 | * 'type' is one of the following: |
1235 | * | |
1236 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1237 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1238 | * - 0 (during a shutdown, no data has to be returned) | |
1239 | * | |
1240 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1241 | * (possibly multiple records if we still don't have anything to return). | |
1242 | * | |
1243 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1244 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1245 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1246 | * argument is non NULL. | |
b35e9050 BM |
1247 | * Also if record payloads contain fragments too small to process, we store |
1248 | * them until there is enough for the respective protocol (the record protocol | |
1249 | * may use arbitrary fragmentation and even interleaving): | |
1250 | * Change cipher spec protocol | |
1251 | * just 1 byte needed, no need for keeping anything stored | |
1252 | * Alert protocol | |
1253 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1254 | * Handshake protocol | |
1255 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1256 | * to detect unexpected Client Hello and Hello Request messages | |
1257 | * here, anything else is handled by higher layers | |
1258 | * Application data protocol | |
1259 | * none of our business | |
1260 | */ | |
657da85e | 1261 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
54105ddd | 1262 | size_t len, int peek, size_t *readbytes) |
0f113f3e | 1263 | { |
99dd3740 | 1264 | int i, j, ret; |
54105ddd | 1265 | size_t n, curr_rec, num_recs, totalbytes; |
0f113f3e | 1266 | SSL3_RECORD *rr; |
94777c9c | 1267 | SSL3_BUFFER *rbuf; |
0f113f3e | 1268 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
bcf2907c | 1269 | int is_tls13 = SSL_IS_TLS13(s); |
0f113f3e | 1270 | |
94777c9c MC |
1271 | rbuf = &s->rlayer.rbuf; |
1272 | ||
1273 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1274 | /* Not initialized yet */ |
196f2cbb MC |
1275 | if (!ssl3_setup_read_buffer(s)) { |
1276 | /* SSLfatal() already called */ | |
eda75751 | 1277 | return -1; |
196f2cbb | 1278 | } |
28d59af8 | 1279 | } |
0f113f3e MC |
1280 | |
1281 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1282 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1283 | && (type != | |
1284 | SSL3_RT_APPLICATION_DATA))) { | |
99dd3740 MC |
1285 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1286 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
1287 | return -1; |
1288 | } | |
1289 | ||
4aa7389e | 1290 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1291 | /* (partially) satisfy request from storage */ |
1292 | { | |
4aa7389e | 1293 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1294 | unsigned char *dst = buf; |
1295 | unsigned int k; | |
1296 | ||
1297 | /* peek == 0 */ | |
1298 | n = 0; | |
4aa7389e | 1299 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1300 | *dst++ = *src++; |
1301 | len--; | |
4aa7389e | 1302 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1303 | n++; |
1304 | } | |
1305 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1306 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1307 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1308 | |
1309 | if (recvd_type != NULL) | |
1310 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1311 | ||
54105ddd | 1312 | *readbytes = n; |
eda75751 | 1313 | return 1; |
0f113f3e MC |
1314 | } |
1315 | ||
1316 | /* | |
4aa7389e | 1317 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1318 | */ |
1319 | ||
024f543c | 1320 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1321 | /* type == SSL3_RT_APPLICATION_DATA */ |
1322 | i = s->handshake_func(s); | |
99dd3740 | 1323 | /* SSLfatal() already called */ |
0f113f3e | 1324 | if (i < 0) |
eda75751 | 1325 | return i; |
99dd3740 | 1326 | if (i == 0) |
eda75751 | 1327 | return -1; |
0f113f3e MC |
1328 | } |
1329 | start: | |
1330 | s->rwstate = SSL_NOTHING; | |
1331 | ||
50e735f9 | 1332 | /*- |
94777c9c MC |
1333 | * For each record 'i' up to |num_recs] |
1334 | * rr[i].type - is the type of record | |
1335 | * rr[i].data, - data | |
1336 | * rr[i].off, - offset into 'data' for next read | |
1337 | * rr[i].length, - number of bytes. | |
50e735f9 | 1338 | */ |
94777c9c MC |
1339 | rr = s->rlayer.rrec; |
1340 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1341 | ||
1342 | do { | |
1343 | /* get new records if necessary */ | |
1344 | if (num_recs == 0) { | |
1345 | ret = ssl3_get_record(s); | |
99dd3740 MC |
1346 | if (ret <= 0) { |
1347 | /* SSLfatal() already called if appropriate */ | |
eda75751 | 1348 | return ret; |
99dd3740 | 1349 | } |
94777c9c MC |
1350 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); |
1351 | if (num_recs == 0) { | |
1352 | /* Shouldn't happen */ | |
99dd3740 MC |
1353 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1354 | ERR_R_INTERNAL_ERROR); | |
1355 | return -1; | |
94777c9c MC |
1356 | } |
1357 | } | |
255cfeac | 1358 | /* Skip over any records we have already read */ |
94777c9c | 1359 | for (curr_rec = 0; |
255cfeac | 1360 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1361 | curr_rec++) ; |
94777c9c MC |
1362 | if (curr_rec == num_recs) { |
1363 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1364 | num_recs = 0; | |
1365 | curr_rec = 0; | |
1366 | } | |
1367 | } while (num_recs == 0); | |
1368 | rr = &rr[curr_rec]; | |
0f113f3e | 1369 | |
3d35e3a2 MC |
1370 | if (s->rlayer.handshake_fragment_len > 0 |
1371 | && SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE | |
1372 | && SSL_IS_TLS13(s)) { | |
1373 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, | |
1374 | SSL_R_MIXED_HANDSHAKE_AND_NON_HANDSHAKE_DATA); | |
1375 | return -1; | |
1376 | } | |
1377 | ||
af58be76 MC |
1378 | /* |
1379 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1380 | * record that isn't an alert. | |
1381 | */ | |
1382 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1383 | && SSL3_RECORD_get_length(rr) != 0) | |
1384 | s->rlayer.alert_count = 0; | |
1385 | ||
0f113f3e MC |
1386 | /* we now have a packet which can be read and processed */ |
1387 | ||
555cbb32 TS |
1388 | if (s->s3.change_cipher_spec /* set when we receive ChangeCipherSpec, |
1389 | * reset by ssl3_get_finished */ | |
747e1639 | 1390 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
99dd3740 MC |
1391 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1392 | SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1393 | return -1; | |
0f113f3e MC |
1394 | } |
1395 | ||
1396 | /* | |
1397 | * If the other end has shut down, throw anything we read away (even in | |
1398 | * 'peek' mode) | |
1399 | */ | |
1400 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1401 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e | 1402 | s->rwstate = SSL_NOTHING; |
eda75751 | 1403 | return 0; |
0f113f3e MC |
1404 | } |
1405 | ||
657da85e | 1406 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e | 1407 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
97997489 | 1408 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL |
bcf2907c | 1409 | && !is_tls13)) { |
657da85e MC |
1410 | /* |
1411 | * SSL3_RT_APPLICATION_DATA or | |
1412 | * SSL3_RT_HANDSHAKE or | |
1413 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1414 | */ | |
0f113f3e MC |
1415 | /* |
1416 | * make sure that we are not getting application data when we are | |
1417 | * doing a handshake for the first time | |
1418 | */ | |
1419 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1420 | (s->enc_read_ctx == NULL)) { | |
99dd3740 MC |
1421 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1422 | SSL_R_APP_DATA_IN_HANDSHAKE); | |
1423 | return -1; | |
0f113f3e MC |
1424 | } |
1425 | ||
657da85e | 1426 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1427 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1428 | && s->rlayer.handshake_fragment_len > 0) { | |
99dd3740 MC |
1429 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1430 | SSL_R_CCS_RECEIVED_EARLY); | |
1431 | return -1; | |
657da85e MC |
1432 | } |
1433 | ||
1434 | if (recvd_type != NULL) | |
1435 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1436 | ||
1c47d35a MC |
1437 | if (len == 0) { |
1438 | /* | |
1439 | * Mark a zero length record as read. This ensures multiple calls to | |
1440 | * SSL_read() with a zero length buffer will eventually cause | |
1441 | * SSL_pending() to report data as being available. | |
1442 | */ | |
1443 | if (SSL3_RECORD_get_length(rr) == 0) | |
1444 | SSL3_RECORD_set_read(rr); | |
eda75751 | 1445 | return 0; |
1c47d35a | 1446 | } |
0f113f3e | 1447 | |
54105ddd | 1448 | totalbytes = 0; |
94777c9c | 1449 | do { |
54105ddd | 1450 | if (len - totalbytes > SSL3_RECORD_get_length(rr)) |
94777c9c MC |
1451 | n = SSL3_RECORD_get_length(rr); |
1452 | else | |
54105ddd | 1453 | n = len - totalbytes; |
94777c9c MC |
1454 | |
1455 | memcpy(buf, &(rr->data[rr->off]), n); | |
1456 | buf += n; | |
b8d24395 MC |
1457 | if (peek) { |
1458 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1459 | if (SSL3_RECORD_get_length(rr) == 0) | |
1460 | SSL3_RECORD_set_read(rr); | |
1461 | } else { | |
753be41d | 1462 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1463 | SSL3_RECORD_add_off(rr, n); |
1464 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1465 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1466 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1467 | SSL3_RECORD_set_read(rr); |
94777c9c | 1468 | } |
0f113f3e | 1469 | } |
94777c9c MC |
1470 | if (SSL3_RECORD_get_length(rr) == 0 |
1471 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1472 | curr_rec++; | |
1473 | rr++; | |
1474 | } | |
54105ddd | 1475 | totalbytes += n; |
94777c9c | 1476 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs |
54105ddd MC |
1477 | && totalbytes < len); |
1478 | if (totalbytes == 0) { | |
255cfeac MC |
1479 | /* We must have read empty records. Get more data */ |
1480 | goto start; | |
1481 | } | |
94777c9c | 1482 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1483 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1484 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c | 1485 | ssl3_release_read_buffer(s); |
54105ddd | 1486 | *readbytes = totalbytes; |
eda75751 | 1487 | return 1; |
0f113f3e MC |
1488 | } |
1489 | ||
1490 | /* | |
1491 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1492 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1493 | * were actually expecting a CCS). | |
0f113f3e MC |
1494 | */ |
1495 | ||
32ec4153 MC |
1496 | /* |
1497 | * Lets just double check that we've not got an SSLv2 record | |
1498 | */ | |
1499 | if (rr->rec_version == SSL2_VERSION) { | |
1500 | /* | |
1501 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1502 | * record back if this is the first packet and we are looking for an | |
1503 | * initial ClientHello. Therefore |type| should always be equal to | |
1504 | * |rr->type|. If not then something has gone horribly wrong | |
1505 | */ | |
99dd3740 MC |
1506 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1507 | ERR_R_INTERNAL_ERROR); | |
1508 | return -1; | |
32ec4153 MC |
1509 | } |
1510 | ||
e8aa8b6c | 1511 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1512 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1513 | /* |
1514 | * If we've got this far and still haven't decided on what version | |
558ea847 RL |
1515 | * we're using then this must be a client side alert we're dealing |
1516 | * with. We shouldn't be receiving anything other than a ClientHello | |
1517 | * if we are a server. | |
13c9bb3e MC |
1518 | */ |
1519 | s->version = rr->rec_version; | |
99dd3740 MC |
1520 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1521 | SSL_R_UNEXPECTED_MESSAGE); | |
1522 | return -1; | |
13c9bb3e MC |
1523 | } |
1524 | ||
50e735f9 | 1525 | /*- |
4aa7389e | 1526 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
50e735f9 MC |
1527 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1528 | */ | |
0f113f3e | 1529 | |
bd990e25 MC |
1530 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
1531 | unsigned int alert_level, alert_descr; | |
1532 | unsigned char *alert_bytes = SSL3_RECORD_get_data(rr) | |
1533 | + SSL3_RECORD_get_off(rr); | |
1534 | PACKET alert; | |
1535 | ||
1536 | if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr)) | |
1537 | || !PACKET_get_1(&alert, &alert_level) | |
1538 | || !PACKET_get_1(&alert, &alert_descr) | |
1539 | || PACKET_remaining(&alert) != 0) { | |
99dd3740 MC |
1540 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1541 | SSL_R_INVALID_ALERT); | |
1542 | return -1; | |
bd990e25 | 1543 | } |
0f113f3e MC |
1544 | |
1545 | if (s->msg_callback) | |
bd990e25 | 1546 | s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, |
4aa7389e | 1547 | s->msg_callback_arg); |
0f113f3e MC |
1548 | |
1549 | if (s->info_callback != NULL) | |
1550 | cb = s->info_callback; | |
1551 | else if (s->ctx->info_callback != NULL) | |
1552 | cb = s->ctx->info_callback; | |
1553 | ||
1554 | if (cb != NULL) { | |
1555 | j = (alert_level << 8) | alert_descr; | |
1556 | cb(s, SSL_CB_READ_ALERT, j); | |
1557 | } | |
1558 | ||
bcf2907c MC |
1559 | if (alert_level == SSL3_AL_WARNING |
1560 | || (is_tls13 && alert_descr == SSL_AD_USER_CANCELLED)) { | |
555cbb32 | 1561 | s->s3.warn_alert = alert_descr; |
63916e9a | 1562 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1563 | |
1564 | s->rlayer.alert_count++; | |
1565 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
99dd3740 MC |
1566 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1567 | SSL_R_TOO_MANY_WARN_ALERTS); | |
1568 | return -1; | |
af58be76 | 1569 | } |
4aa5a566 MC |
1570 | } |
1571 | ||
1572 | /* | |
bcf2907c MC |
1573 | * Apart from close_notify the only other warning alert in TLSv1.3 |
1574 | * is user_cancelled - which we just ignore. | |
4aa5a566 | 1575 | */ |
bcf2907c MC |
1576 | if (is_tls13 && alert_descr == SSL_AD_USER_CANCELLED) { |
1577 | goto start; | |
1578 | } else if (alert_descr == SSL_AD_CLOSE_NOTIFY | |
1579 | && (is_tls13 || alert_level == SSL3_AL_WARNING)) { | |
1580 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1581 | return 0; | |
1582 | } else if (alert_level == SSL3_AL_FATAL || is_tls13) { | |
0f113f3e MC |
1583 | char tmp[16]; |
1584 | ||
1585 | s->rwstate = SSL_NOTHING; | |
555cbb32 | 1586 | s->s3.fatal_alert = alert_descr; |
99dd3740 MC |
1587 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_SSL3_READ_BYTES, |
1588 | SSL_AD_REASON_OFFSET + alert_descr); | |
1589 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
0f113f3e MC |
1590 | ERR_add_error_data(2, "SSL alert number ", tmp); |
1591 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1592 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1593 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 1594 | return 0; |
bcf2907c MC |
1595 | } else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { |
1596 | /* | |
1597 | * This is a warning but we receive it if we requested | |
1598 | * renegotiation and the peer denied it. Terminate with a fatal | |
1599 | * alert because if application tried to renegotiate it | |
1600 | * presumably had a good reason and expects it to succeed. In | |
1601 | * future we might have a renegotiation where we don't care if | |
1602 | * the peer refused it where we carry on. | |
1603 | */ | |
1604 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL3_READ_BYTES, | |
1605 | SSL_R_NO_RENEGOTIATION); | |
99dd3740 | 1606 | return -1; |
fee33643 MC |
1607 | } else if (alert_level == SSL3_AL_WARNING) { |
1608 | /* We ignore any other warning alert in TLSv1.2 and below */ | |
1609 | goto start; | |
0f113f3e | 1610 | } |
bcf2907c MC |
1611 | |
1612 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL3_READ_BYTES, | |
1613 | SSL_R_UNKNOWN_ALERT_TYPE); | |
1614 | return -1; | |
0f113f3e MC |
1615 | } |
1616 | ||
ba709049 | 1617 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
ba709049 MC |
1618 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
1619 | BIO *rbio; | |
1620 | ||
1bf4cb0f MC |
1621 | /* |
1622 | * We ignore any handshake messages sent to us unless they are | |
1623 | * TLSv1.3 in which case we want to process them. For all other | |
1624 | * handshake messages we can't do anything reasonable with them | |
1625 | * because we are unable to write any response due to having already | |
1626 | * sent close_notify. | |
1627 | */ | |
1628 | if (!SSL_IS_TLS13(s)) { | |
1629 | SSL3_RECORD_set_length(rr, 0); | |
1630 | SSL3_RECORD_set_read(rr); | |
1631 | ||
1632 | if ((s->mode & SSL_MODE_AUTO_RETRY) != 0) | |
1633 | goto start; | |
ba709049 | 1634 | |
1bf4cb0f MC |
1635 | s->rwstate = SSL_READING; |
1636 | rbio = SSL_get_rbio(s); | |
1637 | BIO_clear_retry_flags(rbio); | |
1638 | BIO_set_retry_read(rbio); | |
1639 | return -1; | |
1640 | } | |
358ffa05 MC |
1641 | } else { |
1642 | /* | |
1643 | * The peer is continuing to send application data, but we have | |
1644 | * already sent close_notify. If this was expected we should have | |
1645 | * been called via SSL_read() and this would have been handled | |
1646 | * above. | |
1647 | * No alert sent because we already sent close_notify | |
1648 | */ | |
1bf4cb0f MC |
1649 | SSL3_RECORD_set_length(rr, 0); |
1650 | SSL3_RECORD_set_read(rr); | |
358ffa05 MC |
1651 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_SSL3_READ_BYTES, |
1652 | SSL_R_APPLICATION_DATA_AFTER_CLOSE_NOTIFY); | |
1bf4cb0f | 1653 | return -1; |
ba709049 | 1654 | } |
0f113f3e MC |
1655 | } |
1656 | ||
93f528f3 MC |
1657 | /* |
1658 | * For handshake data we have 'fragment' storage, so fill that so that we | |
1659 | * can process the header at a fixed place. This is done after the | |
1660 | * "SHUTDOWN" code above to avoid filling the fragment storage with data | |
1661 | * that we're just going to discard. | |
1662 | */ | |
1663 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { | |
1664 | size_t dest_maxlen = sizeof(s->rlayer.handshake_fragment); | |
1665 | unsigned char *dest = s->rlayer.handshake_fragment; | |
1666 | size_t *dest_len = &s->rlayer.handshake_fragment_len; | |
1667 | ||
1668 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
1669 | if (SSL3_RECORD_get_length(rr) < n) | |
1670 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
1671 | ||
1672 | /* now move 'n' bytes: */ | |
1673 | memcpy(dest + *dest_len, | |
1674 | SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n); | |
1675 | SSL3_RECORD_add_off(rr, n); | |
1676 | SSL3_RECORD_sub_length(rr, n); | |
1677 | *dest_len += n; | |
1678 | if (SSL3_RECORD_get_length(rr) == 0) | |
1679 | SSL3_RECORD_set_read(rr); | |
1680 | ||
1681 | if (*dest_len < dest_maxlen) | |
1682 | goto start; /* fragment was too small */ | |
1683 | } | |
1684 | ||
747e1639 | 1685 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
99dd3740 MC |
1686 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1687 | SSL_R_CCS_RECEIVED_EARLY); | |
1688 | return -1; | |
0f113f3e MC |
1689 | } |
1690 | ||
1691 | /* | |
c7f47786 | 1692 | * Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or |
0386aad1 | 1693 | * protocol violation) |
0f113f3e | 1694 | */ |
024f543c | 1695 | if ((s->rlayer.handshake_fragment_len >= 4) |
c7f47786 | 1696 | && !ossl_statem_get_in_handshake(s)) { |
39ef7821 MC |
1697 | int ined = (s->early_data_state == SSL_EARLY_DATA_READING); |
1698 | ||
c7f47786 MC |
1699 | /* We found handshake data, so we're going back into init */ |
1700 | ossl_statem_set_in_init(s, 1); | |
1701 | ||
0f113f3e | 1702 | i = s->handshake_func(s); |
99dd3740 | 1703 | /* SSLfatal() already called if appropriate */ |
0f113f3e | 1704 | if (i < 0) |
eda75751 | 1705 | return i; |
0f113f3e | 1706 | if (i == 0) { |
eda75751 | 1707 | return -1; |
0f113f3e MC |
1708 | } |
1709 | ||
39ef7821 MC |
1710 | /* |
1711 | * If we were actually trying to read early data and we found a | |
1712 | * handshake message, then we don't want to continue to try and read | |
1713 | * the application data any more. It won't be "early" now. | |
1714 | */ | |
1715 | if (ined) | |
1716 | return -1; | |
1717 | ||
0f113f3e | 1718 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { |
94777c9c | 1719 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1720 | /* no read-ahead left? */ |
0f113f3e MC |
1721 | BIO *bio; |
1722 | /* | |
1723 | * In the case where we try to read application data, but we | |
1724 | * trigger an SSL handshake, we return -1 with the retry | |
1725 | * option set. Otherwise renegotiation may cause nasty | |
1726 | * problems in the blocking world | |
1727 | */ | |
1728 | s->rwstate = SSL_READING; | |
1729 | bio = SSL_get_rbio(s); | |
1730 | BIO_clear_retry_flags(bio); | |
1731 | BIO_set_retry_read(bio); | |
eda75751 | 1732 | return -1; |
0f113f3e MC |
1733 | } |
1734 | } | |
1735 | goto start; | |
1736 | } | |
1737 | ||
747e1639 | 1738 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1739 | default: |
0f113f3e | 1740 | /* |
436a2a01 MC |
1741 | * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but |
1742 | * TLS 1.2 says you MUST send an unexpected message alert. We use the | |
1743 | * TLS 1.2 behaviour for all protocol versions to prevent issues where | |
1744 | * no progress is being made and the peer continually sends unrecognised | |
1745 | * record types, using up resources processing them. | |
0f113f3e | 1746 | */ |
99dd3740 MC |
1747 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1748 | SSL_R_UNEXPECTED_RECORD); | |
1749 | return -1; | |
0f113f3e MC |
1750 | case SSL3_RT_CHANGE_CIPHER_SPEC: |
1751 | case SSL3_RT_ALERT: | |
1752 | case SSL3_RT_HANDSHAKE: | |
1753 | /* | |
1754 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1755 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1756 | * that should not happen when type != rr->type | |
0f113f3e | 1757 | */ |
99dd3740 MC |
1758 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1759 | ERR_R_INTERNAL_ERROR); | |
1760 | return -1; | |
0f113f3e MC |
1761 | case SSL3_RT_APPLICATION_DATA: |
1762 | /* | |
1763 | * At this point, we were expecting handshake data, but have | |
1764 | * application data. If the library was running inside ssl3_read() | |
1765 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1766 | * application data at this point (session renegotiation not yet | |
1767 | * started), we will indulge it. | |
1768 | */ | |
fe3a3291 | 1769 | if (ossl_statem_app_data_allowed(s)) { |
555cbb32 | 1770 | s->s3.in_read_app_data = 2; |
eda75751 | 1771 | return -1; |
a832b5ef MC |
1772 | } else if (ossl_statem_skip_early_data(s)) { |
1773 | /* | |
1774 | * This can happen after a client sends a CH followed by early_data, | |
1775 | * but the server responds with a HelloRetryRequest. The server | |
1776 | * reads the next record from the client expecting to find a | |
1777 | * plaintext ClientHello but gets a record which appears to be | |
1778 | * application data. The trial decrypt "works" because null | |
1779 | * decryption was applied. We just skip it and move on to the next | |
1780 | * record. | |
1781 | */ | |
1782 | if (!early_data_count_ok(s, rr->length, | |
196f2cbb MC |
1783 | EARLY_DATA_CIPHERTEXT_OVERHEAD, 0)) { |
1784 | /* SSLfatal() already called */ | |
99dd3740 | 1785 | return -1; |
196f2cbb | 1786 | } |
a832b5ef MC |
1787 | SSL3_RECORD_set_read(rr); |
1788 | goto start; | |
0f113f3e | 1789 | } else { |
99dd3740 MC |
1790 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1791 | SSL_R_UNEXPECTED_RECORD); | |
1792 | return -1; | |
0f113f3e MC |
1793 | } |
1794 | } | |
0f113f3e | 1795 | } |
d02b48c6 | 1796 | |
14daae5a MC |
1797 | void ssl3_record_sequence_update(unsigned char *seq) |
1798 | { | |
1799 | int i; | |
1800 | ||
1801 | for (i = 7; i >= 0; i--) { | |
1802 | ++seq[i]; | |
1803 | if (seq[i] != 0) | |
1804 | break; | |
1805 | } | |
1806 | } | |
1807 | ||
d45ba43d MC |
1808 | /* |
1809 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1810 | * format and false otherwise. | |
1811 | */ | |
32ec4153 MC |
1812 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1813 | { | |
94777c9c | 1814 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1815 | } |
0f113f3e | 1816 | |
d45ba43d MC |
1817 | /* |
1818 | * Returns the length in bytes of the current rrec | |
1819 | */ | |
eda75751 | 1820 | size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1821 | { |
94777c9c | 1822 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1823 | } |