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846e33c7 | 1 | /* |
677963e5 | 2 | * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved. |
c51ae173 | 3 | * |
846e33c7 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
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 | |
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 MC |
189 | if (rb->buf == NULL) |
190 | if (!ssl3_setup_read_buffer(s)) | |
191 | return -1; | |
192 | ||
193 | left = rb->left; | |
a4d64c7f | 194 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 | 195 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
753be41d | 196 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 197 | #endif |
d02b48c6 | 198 | |
0f113f3e MC |
199 | if (!extend) { |
200 | /* start with empty packet ... */ | |
201 | if (left == 0) | |
202 | rb->offset = align; | |
203 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
204 | /* | |
205 | * check if next packet length is large enough to justify payload | |
206 | * alignment... | |
207 | */ | |
208 | pkt = rb->buf + rb->offset; | |
209 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
210 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
211 | /* | |
212 | * Note that even if packet is corrupted and its length field | |
213 | * is insane, we can only be led to wrong decision about | |
214 | * whether memmove will occur or not. Header values has no | |
215 | * effect on memmove arguments and therefore no buffer | |
216 | * overrun can be triggered. | |
217 | */ | |
218 | memmove(rb->buf + align, pkt, left); | |
219 | rb->offset = align; | |
220 | } | |
221 | } | |
7a7048af MC |
222 | s->rlayer.packet = rb->buf + rb->offset; |
223 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
224 | /* ... now we can act as if 'extend' was set */ |
225 | } | |
226 | ||
a7faa6da MC |
227 | len = s->rlayer.packet_length; |
228 | pkt = rb->buf + align; | |
229 | /* | |
230 | * Move any available bytes to front of buffer: 'len' bytes already | |
231 | * pointed to by 'packet', 'left' extra ones at the end | |
232 | */ | |
233 | if (s->rlayer.packet != pkt && clearold == 1) { | |
234 | memmove(pkt, s->rlayer.packet, len + left); | |
235 | s->rlayer.packet = pkt; | |
236 | rb->offset = len + align; | |
237 | } | |
238 | ||
0f113f3e MC |
239 | /* |
240 | * For DTLS/UDP reads should not span multiple packets because the read | |
241 | * operation returns the whole packet at once (as long as it fits into | |
242 | * the buffer). | |
243 | */ | |
244 | if (SSL_IS_DTLS(s)) { | |
245 | if (left == 0 && extend) | |
246 | return 0; | |
247 | if (left > 0 && n > left) | |
248 | n = left; | |
249 | } | |
250 | ||
251 | /* if there is enough in the buffer from a previous read, take some */ | |
252 | if (left >= n) { | |
7a7048af | 253 | s->rlayer.packet_length += n; |
0f113f3e MC |
254 | rb->left = left - n; |
255 | rb->offset += n; | |
54105ddd | 256 | *readbytes = n; |
8e6d03ca | 257 | return 1; |
0f113f3e MC |
258 | } |
259 | ||
260 | /* else we need to read more data */ | |
261 | ||
ff04799d | 262 | if (n > rb->len - rb->offset) { /* does not happen */ |
0f113f3e MC |
263 | SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); |
264 | return -1; | |
265 | } | |
266 | ||
8dd4ad0f | 267 | /* We always act like read_ahead is set for DTLS */ |
4118dfdc | 268 | if (!s->rlayer.read_ahead && !SSL_IS_DTLS(s)) |
0f113f3e MC |
269 | /* ignore max parameter */ |
270 | max = n; | |
271 | else { | |
272 | if (max < n) | |
273 | max = n; | |
ff04799d | 274 | if (max > rb->len - rb->offset) |
0f113f3e MC |
275 | max = rb->len - rb->offset; |
276 | } | |
277 | ||
278 | while (left < n) { | |
f0ca8f89 | 279 | size_t bioread = 0; |
8e6d03ca MC |
280 | int ret; |
281 | ||
0f113f3e MC |
282 | /* |
283 | * Now we have len+left bytes at the front of s->s3->rbuf.buf and | |
284 | * need to read in more until we have len+n (up to len+max if | |
285 | * possible) | |
286 | */ | |
287 | ||
288 | clear_sys_error(); | |
289 | if (s->rbio != NULL) { | |
290 | s->rwstate = SSL_READING; | |
8e6d03ca MC |
291 | /* TODO(size_t): Convert this function */ |
292 | ret = BIO_read(s->rbio, pkt + len + left, max - left); | |
293 | if (ret >= 0) | |
294 | bioread = ret; | |
0f113f3e MC |
295 | } else { |
296 | SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); | |
8e6d03ca | 297 | ret = -1; |
0f113f3e MC |
298 | } |
299 | ||
8e6d03ca | 300 | if (ret <= 0) { |
0f113f3e MC |
301 | rb->left = left; |
302 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
303 | if (len + left == 0) | |
304 | ssl3_release_read_buffer(s); | |
beacb0f0 | 305 | return ret; |
0f113f3e | 306 | } |
8e6d03ca | 307 | left += bioread; |
0f113f3e MC |
308 | /* |
309 | * reads should *never* span multiple packets for DTLS because the | |
310 | * underlying transport protocol is message oriented as opposed to | |
311 | * byte oriented as in the TLS case. | |
312 | */ | |
313 | if (SSL_IS_DTLS(s)) { | |
314 | if (n > left) | |
315 | n = left; /* makes the while condition false */ | |
316 | } | |
317 | } | |
318 | ||
319 | /* done reading, now the book-keeping */ | |
320 | rb->offset += n; | |
321 | rb->left = left - n; | |
7a7048af | 322 | s->rlayer.packet_length += n; |
0f113f3e | 323 | s->rwstate = SSL_NOTHING; |
54105ddd | 324 | *readbytes = n; |
8e6d03ca | 325 | return 1; |
0f113f3e MC |
326 | } |
327 | ||
0f113f3e MC |
328 | /* |
329 | * Call this to write data in records of type 'type' It will return <= 0 if | |
330 | * not all data has been sent or non-blocking IO. | |
d02b48c6 | 331 | */ |
7ee8627f MC |
332 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len, |
333 | size_t *written) | |
0f113f3e MC |
334 | { |
335 | const unsigned char *buf = buf_; | |
7ee8627f | 336 | size_t tot; |
cf72c757 | 337 | size_t n, max_send_fragment, split_send_fragment, maxpipes; |
f1f7598c | 338 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
cf72c757 | 339 | size_t nw; |
f1f7598c | 340 | #endif |
d102d9df | 341 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 342 | int i; |
7ee8627f | 343 | size_t tmpwrit; |
0f113f3e MC |
344 | |
345 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 346 | tot = s->rlayer.wnum; |
0f113f3e MC |
347 | /* |
348 | * ensure that if we end up with a smaller value of data to write out | |
3519bae5 | 349 | * than the original len from a write which didn't complete for |
0f113f3e MC |
350 | * non-blocking I/O and also somehow ended up avoiding the check for |
351 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
352 | * possible to end up with (len-tot) as a large number that will then | |
353 | * promptly send beyond the end of the users buffer ... so we trap and | |
354 | * report the error in a way the user will notice | |
355 | */ | |
bd91e3c8 | 356 | if ((len < s->rlayer.wnum) |
cbbe9186 | 357 | || ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) { |
0f113f3e | 358 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); |
1c2e5d56 MC |
359 | return -1; |
360 | } | |
361 | ||
7daf7156 MC |
362 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
363 | && !early_data_count_ok(s, len, 0, NULL)) | |
364 | return -1; | |
365 | ||
1c2e5d56 MC |
366 | s->rlayer.wnum = 0; |
367 | ||
59cebcf9 MC |
368 | /* |
369 | * When writing early data on the server side we could be "in_init" in | |
370 | * between receiving the EoED and the CF - but we don't want to handle those | |
371 | * messages yet. | |
372 | */ | |
373 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s) | |
374 | && s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) { | |
1c2e5d56 MC |
375 | i = s->handshake_func(s); |
376 | if (i < 0) | |
7ee8627f | 377 | return i; |
1c2e5d56 MC |
378 | if (i == 0) { |
379 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
380 | return -1; | |
381 | } | |
0f113f3e MC |
382 | } |
383 | ||
384 | /* | |
385 | * first check if there is a SSL3_BUFFER still being written out. This | |
386 | * will happen with non blocking IO | |
387 | */ | |
388 | if (wb->left != 0) { | |
7ee8627f MC |
389 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, |
390 | &tmpwrit); | |
0f113f3e MC |
391 | if (i <= 0) { |
392 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 393 | s->rlayer.wnum = tot; |
0f113f3e MC |
394 | return i; |
395 | } | |
7ee8627f | 396 | tot += tmpwrit; /* this might be last fragment */ |
0f113f3e | 397 | } |
a9c6edcd | 398 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
399 | /* |
400 | * Depending on platform multi-block can deliver several *times* | |
401 | * better performance. Downside is that it has to allocate | |
8483a003 | 402 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
403 | * compromise is considered worthy. |
404 | */ | |
405 | if (type == SSL3_RT_APPLICATION_DATA && | |
cf72c757 | 406 | len >= 4 * (max_send_fragment = ssl_get_max_send_fragment(s)) && |
0f113f3e | 407 | s->compress == NULL && s->msg_callback == NULL && |
28a31a0a | 408 | !SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && |
846ec07d | 409 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
410 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
411 | unsigned char aad[13]; | |
412 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
8e6d03ca | 413 | size_t packlen; |
e3c9727f | 414 | int packleni; |
0f113f3e MC |
415 | |
416 | /* minimize address aliasing conflicts */ | |
417 | if ((max_send_fragment & 0xfff) == 0) | |
418 | max_send_fragment -= 512; | |
419 | ||
420 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
421 | ssl3_release_write_buffer(s); | |
422 | ||
423 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
424 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
8b0e934a | 425 | (int)max_send_fragment, NULL); |
0f113f3e | 426 | |
7ee8627f | 427 | if (len >= 8 * max_send_fragment) |
0f113f3e MC |
428 | packlen *= 8; |
429 | else | |
430 | packlen *= 4; | |
431 | ||
58c27c20 | 432 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
918bb865 MC |
433 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); |
434 | return -1; | |
435 | } | |
0f113f3e | 436 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
437 | /* free jumbo buffer */ |
438 | ssl3_release_write_buffer(s); | |
8b0e934a MC |
439 | *written = tot; |
440 | return 1; | |
0f113f3e MC |
441 | } |
442 | ||
443 | n = (len - tot); | |
444 | for (;;) { | |
445 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
446 | /* free jumbo buffer */ |
447 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
448 | break; |
449 | } | |
450 | ||
451 | if (s->s3->alert_dispatch) { | |
452 | i = s->method->ssl_dispatch_alert(s); | |
453 | if (i <= 0) { | |
e2228d31 | 454 | s->rlayer.wnum = tot; |
0f113f3e MC |
455 | return i; |
456 | } | |
457 | } | |
458 | ||
459 | if (n >= 8 * max_send_fragment) | |
460 | nw = max_send_fragment * (mb_param.interleave = 8); | |
461 | else | |
462 | nw = max_send_fragment * (mb_param.interleave = 4); | |
463 | ||
de07f311 | 464 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
465 | aad[8] = type; |
466 | aad[9] = (unsigned char)(s->version >> 8); | |
467 | aad[10] = (unsigned char)(s->version); | |
468 | aad[11] = 0; | |
469 | aad[12] = 0; | |
470 | mb_param.out = NULL; | |
471 | mb_param.inp = aad; | |
472 | mb_param.len = nw; | |
473 | ||
e3c9727f | 474 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, |
0f113f3e MC |
475 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, |
476 | sizeof(mb_param), &mb_param); | |
e3c9727f MC |
477 | packlen = (size_t)packleni; |
478 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
58c27c20 MC |
479 | /* free jumbo buffer */ |
480 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
481 | break; |
482 | } | |
483 | ||
484 | mb_param.out = wb->buf; | |
485 | mb_param.inp = &buf[tot]; | |
486 | mb_param.len = nw; | |
487 | ||
488 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
489 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
490 | sizeof(mb_param), &mb_param) <= 0) | |
491 | return -1; | |
492 | ||
de07f311 MC |
493 | s->rlayer.write_sequence[7] += mb_param.interleave; |
494 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 495 | int j = 6; |
de07f311 | 496 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
497 | } |
498 | ||
499 | wb->offset = 0; | |
500 | wb->left = packlen; | |
501 | ||
f8caa3c8 MC |
502 | s->rlayer.wpend_tot = nw; |
503 | s->rlayer.wpend_buf = &buf[tot]; | |
504 | s->rlayer.wpend_type = type; | |
505 | s->rlayer.wpend_ret = nw; | |
0f113f3e | 506 | |
7ee8627f | 507 | i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); |
0f113f3e | 508 | if (i <= 0) { |
1d2a18dc | 509 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
510 | /* free jumbo buffer */ |
511 | ssl3_release_write_buffer(s); | |
0f113f3e | 512 | } |
e2228d31 | 513 | s->rlayer.wnum = tot; |
0f113f3e MC |
514 | return i; |
515 | } | |
7ee8627f | 516 | if (tmpwrit == n) { |
58c27c20 MC |
517 | /* free jumbo buffer */ |
518 | ssl3_release_write_buffer(s); | |
7ee8627f MC |
519 | *written = tot + tmpwrit; |
520 | return 1; | |
0f113f3e | 521 | } |
7ee8627f MC |
522 | n -= tmpwrit; |
523 | tot += tmpwrit; | |
0f113f3e MC |
524 | } |
525 | } else | |
cf72c757 | 526 | #endif /* !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK */ |
0f113f3e MC |
527 | if (tot == len) { /* done? */ |
528 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
529 | ssl3_release_write_buffer(s); | |
530 | ||
7ee8627f MC |
531 | *written = tot; |
532 | return 1; | |
0f113f3e MC |
533 | } |
534 | ||
535 | n = (len - tot); | |
d102d9df | 536 | |
cf72c757 F |
537 | max_send_fragment = ssl_get_max_send_fragment(s); |
538 | split_send_fragment = ssl_get_split_send_fragment(s); | |
d102d9df MC |
539 | /* |
540 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 541 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
542 | * processing then we also only use 1 pipeline, or if we're not using |
543 | * explicit IVs | |
544 | */ | |
545 | maxpipes = s->max_pipelines; | |
546 | if (maxpipes > SSL_MAX_PIPELINES) { | |
547 | /* | |
548 | * We should have prevented this when we set max_pipelines so we | |
549 | * shouldn't get here | |
a230b26e | 550 | */ |
d102d9df MC |
551 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
552 | return -1; | |
553 | } | |
554 | if (maxpipes == 0 | |
a230b26e EK |
555 | || s->enc_write_ctx == NULL |
556 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
557 | & EVP_CIPH_FLAG_PIPELINE) | |
558 | || !SSL_USE_EXPLICIT_IV(s)) | |
d102d9df | 559 | maxpipes = 1; |
cf72c757 F |
560 | if (max_send_fragment == 0 || split_send_fragment == 0 |
561 | || split_send_fragment > max_send_fragment) { | |
d102d9df | 562 | /* |
cf72c757 | 563 | * We should have prevented this when we set/get the split and max send |
d102d9df | 564 | * fragments so we shouldn't get here |
a230b26e | 565 | */ |
d102d9df MC |
566 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
567 | return -1; | |
568 | } | |
569 | ||
0f113f3e | 570 | for (;;) { |
7ee8627f MC |
571 | size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
572 | size_t numpipes, j; | |
d102d9df MC |
573 | |
574 | if (n == 0) | |
575 | numpipes = 1; | |
0f113f3e | 576 | else |
d102d9df MC |
577 | numpipes = ((n - 1) / split_send_fragment) + 1; |
578 | if (numpipes > maxpipes) | |
579 | numpipes = maxpipes; | |
580 | ||
cf72c757 | 581 | if (n / numpipes >= max_send_fragment) { |
d102d9df MC |
582 | /* |
583 | * We have enough data to completely fill all available | |
584 | * pipelines | |
585 | */ | |
586 | for (j = 0; j < numpipes; j++) { | |
cf72c757 | 587 | pipelens[j] = max_send_fragment; |
d102d9df MC |
588 | } |
589 | } else { | |
590 | /* We can partially fill all available pipelines */ | |
591 | tmppipelen = n / numpipes; | |
592 | remain = n % numpipes; | |
593 | for (j = 0; j < numpipes; j++) { | |
594 | pipelens[j] = tmppipelen; | |
595 | if (j < remain) | |
596 | pipelens[j]++; | |
597 | } | |
598 | } | |
0f113f3e | 599 | |
7ee8627f MC |
600 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0, |
601 | &tmpwrit); | |
0f113f3e MC |
602 | if (i <= 0) { |
603 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 604 | s->rlayer.wnum = tot; |
0f113f3e MC |
605 | return i; |
606 | } | |
607 | ||
ff04799d | 608 | if (tmpwrit == n || |
0f113f3e MC |
609 | (type == SSL3_RT_APPLICATION_DATA && |
610 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
611 | /* | |
612 | * next chunk of data should get another prepended empty fragment | |
613 | * in ciphersuites with known-IV weakness: | |
614 | */ | |
615 | s->s3->empty_fragment_done = 0; | |
616 | ||
617 | if ((i == (int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && | |
618 | !SSL_IS_DTLS(s)) | |
619 | ssl3_release_write_buffer(s); | |
620 | ||
7ee8627f MC |
621 | *written = tot + tmpwrit; |
622 | return 1; | |
0f113f3e MC |
623 | } |
624 | ||
7ee8627f MC |
625 | n -= tmpwrit; |
626 | tot += tmpwrit; | |
0f113f3e MC |
627 | } |
628 | } | |
d02b48c6 | 629 | |
c103c7e2 | 630 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
7ee8627f MC |
631 | size_t *pipelens, size_t numpipes, |
632 | int create_empty_fragment, size_t *written) | |
0f113f3e | 633 | { |
c7c42022 | 634 | WPACKET pkt[SSL_MAX_PIPELINES]; |
d102d9df | 635 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; |
44e58f3b MC |
636 | WPACKET *thispkt; |
637 | SSL3_RECORD *thiswr; | |
c7c42022 | 638 | unsigned char *recordstart; |
0f113f3e | 639 | int i, mac_size, clear = 0; |
7ee8627f | 640 | size_t prefix_len = 0; |
829754a6 | 641 | int eivlen = 0; |
f4bd5de5 | 642 | size_t align = 0; |
d102d9df | 643 | SSL3_BUFFER *wb; |
0f113f3e | 644 | SSL_SESSION *sess; |
c7c42022 | 645 | size_t totlen = 0, len, wpinited = 0; |
7ee8627f | 646 | size_t j; |
0f113f3e | 647 | |
d102d9df MC |
648 | for (j = 0; j < numpipes; j++) |
649 | totlen += pipelens[j]; | |
0f113f3e MC |
650 | /* |
651 | * first check if there is a SSL3_BUFFER still being written out. This | |
652 | * will happen with non blocking IO | |
653 | */ | |
d102d9df | 654 | if (RECORD_LAYER_write_pending(&s->rlayer)) |
7ee8627f | 655 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e MC |
656 | |
657 | /* If we have an alert to send, lets send it */ | |
658 | if (s->s3->alert_dispatch) { | |
659 | i = s->method->ssl_dispatch_alert(s); | |
660 | if (i <= 0) | |
26a7d938 | 661 | return i; |
0f113f3e MC |
662 | /* if it went, fall through and send more stuff */ |
663 | } | |
664 | ||
d102d9df | 665 | if (s->rlayer.numwpipes < numpipes) |
58c27c20 | 666 | if (!ssl3_setup_write_buffer(s, numpipes, 0)) |
0f113f3e MC |
667 | return -1; |
668 | ||
d102d9df | 669 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
670 | return 0; |
671 | ||
0f113f3e MC |
672 | sess = s->session; |
673 | ||
674 | if ((sess == NULL) || | |
a230b26e | 675 | (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) { |
0f113f3e | 676 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
677 | mac_size = 0; |
678 | } else { | |
7ee8627f | 679 | /* TODO(siz_t): Convert me */ |
0f113f3e MC |
680 | mac_size = EVP_MD_CTX_size(s->write_hash); |
681 | if (mac_size < 0) | |
682 | goto err; | |
683 | } | |
d02b48c6 | 684 | |
0f113f3e MC |
685 | /* |
686 | * 'create_empty_fragment' is true only when this function calls itself | |
687 | */ | |
688 | if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done) { | |
689 | /* | |
690 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
691 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
692 | */ | |
693 | ||
694 | if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { | |
695 | /* | |
696 | * recursive function call with 'create_empty_fragment' set; this | |
697 | * prepares and buffers the data for an empty fragment (these | |
698 | * 'prefix_len' bytes are sent out later together with the actual | |
699 | * payload) | |
700 | */ | |
7ee8627f MC |
701 | size_t tmppipelen = 0; |
702 | int ret; | |
d102d9df | 703 | |
7ee8627f MC |
704 | ret = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1, &prefix_len); |
705 | if (ret <= 0) | |
0f113f3e MC |
706 | goto err; |
707 | ||
708 | if (prefix_len > | |
a230b26e | 709 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) { |
0f113f3e MC |
710 | /* insufficient space */ |
711 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
712 | goto err; | |
713 | } | |
714 | } | |
715 | ||
716 | s->s3->empty_fragment_done = 1; | |
717 | } | |
718 | ||
719 | if (create_empty_fragment) { | |
d102d9df | 720 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 721 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
722 | /* |
723 | * extra fragment would be couple of cipher blocks, which would be | |
724 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
8483a003 | 725 | * payload, then we can just pretend we simply have two headers. |
0f113f3e | 726 | */ |
f4bd5de5 | 727 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
753be41d | 728 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 729 | #endif |
747e1639 | 730 | SSL3_BUFFER_set_offset(wb, align); |
c7c42022 MC |
731 | if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), |
732 | SSL3_BUFFER_get_len(wb), 0) | |
733 | || !WPACKET_allocate_bytes(&pkt[0], align, NULL)) { | |
734 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
735 | goto err; | |
736 | } | |
737 | wpinited = 1; | |
0f113f3e | 738 | } else if (prefix_len) { |
d102d9df | 739 | wb = &s->rlayer.wbuf[0]; |
44e58f3b MC |
740 | if (!WPACKET_init_static_len(&pkt[0], |
741 | SSL3_BUFFER_get_buf(wb), | |
c7c42022 MC |
742 | SSL3_BUFFER_get_len(wb), 0) |
743 | || !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb) | |
744 | + prefix_len, NULL)) { | |
745 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
746 | goto err; | |
747 | } | |
748 | wpinited = 1; | |
0f113f3e | 749 | } else { |
a230b26e | 750 | for (j = 0; j < numpipes; j++) { |
44e58f3b MC |
751 | thispkt = &pkt[j]; |
752 | ||
d102d9df | 753 | wb = &s->rlayer.wbuf[j]; |
829754a6 | 754 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
d102d9df | 755 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
753be41d | 756 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 757 | #endif |
d102d9df | 758 | SSL3_BUFFER_set_offset(wb, align); |
44e58f3b | 759 | if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), |
c7c42022 | 760 | SSL3_BUFFER_get_len(wb), 0) |
44e58f3b | 761 | || !WPACKET_allocate_bytes(thispkt, align, NULL)) { |
c7c42022 MC |
762 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
763 | goto err; | |
764 | } | |
765 | wpinited++; | |
d102d9df | 766 | } |
0f113f3e MC |
767 | } |
768 | ||
0f113f3e | 769 | /* Explicit IV length, block ciphers appropriate version flag */ |
49e7fe12 | 770 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s) && !SSL_TREAT_AS_TLS13(s)) { |
0f113f3e MC |
771 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); |
772 | if (mode == EVP_CIPH_CBC_MODE) { | |
7ee8627f | 773 | /* TODO(size_t): Convert me */ |
0f113f3e MC |
774 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); |
775 | if (eivlen <= 1) | |
776 | eivlen = 0; | |
c7c42022 MC |
777 | } else if (mode == EVP_CIPH_GCM_MODE) { |
778 | /* Need explicit part of IV for GCM mode */ | |
0f113f3e | 779 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 780 | } else if (mode == EVP_CIPH_CCM_MODE) { |
e75c5a79 | 781 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 782 | } |
c7c42022 | 783 | } |
0f113f3e | 784 | |
d102d9df MC |
785 | totlen = 0; |
786 | /* Clear our SSL3_RECORD structures */ | |
787 | memset(wr, 0, sizeof wr); | |
a230b26e | 788 | for (j = 0; j < numpipes; j++) { |
49e7fe12 | 789 | unsigned int version = SSL_TREAT_AS_TLS13(s) ? TLS1_VERSION : s->version; |
e8eb224b | 790 | unsigned char *compressdata = NULL; |
c7c42022 | 791 | size_t maxcomplen; |
e60ce9c4 | 792 | unsigned int rectype; |
0f113f3e | 793 | |
44e58f3b MC |
794 | thispkt = &pkt[j]; |
795 | thiswr = &wr[j]; | |
796 | ||
797 | SSL3_RECORD_set_type(thiswr, type); | |
e60ce9c4 MC |
798 | /* |
799 | * In TLSv1.3, once encrypting, we always use application data for the | |
800 | * record type | |
801 | */ | |
49e7fe12 | 802 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) |
e60ce9c4 MC |
803 | rectype = SSL3_RT_APPLICATION_DATA; |
804 | else | |
805 | rectype = type; | |
d102d9df | 806 | /* |
8483a003 | 807 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
808 | * and record version number > TLS 1.0 |
809 | */ | |
810 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
811 | && !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION) | |
c7c42022 | 812 | version = TLS1_VERSION; |
0f113f3e | 813 | |
44e58f3b MC |
814 | maxcomplen = pipelens[j]; |
815 | if (s->compress != NULL) | |
f33f9dde | 816 | maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
44e58f3b | 817 | |
c7c42022 | 818 | /* write the header */ |
44e58f3b MC |
819 | if (!WPACKET_put_bytes_u8(thispkt, rectype) |
820 | || !WPACKET_put_bytes_u16(thispkt, version) | |
821 | || !WPACKET_start_sub_packet_u16(thispkt) | |
c7c42022 | 822 | || (eivlen > 0 |
44e58f3b | 823 | && !WPACKET_allocate_bytes(thispkt, eivlen, NULL)) |
c7c42022 | 824 | || (maxcomplen > 0 |
44e58f3b | 825 | && !WPACKET_reserve_bytes(thispkt, maxcomplen, |
c7c42022 MC |
826 | &compressdata))) { |
827 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
828 | goto err; | |
829 | } | |
0f113f3e | 830 | |
d102d9df | 831 | /* lets setup the record stuff. */ |
44e58f3b MC |
832 | SSL3_RECORD_set_data(thiswr, compressdata); |
833 | SSL3_RECORD_set_length(thiswr, pipelens[j]); | |
834 | SSL3_RECORD_set_input(thiswr, (unsigned char *)&buf[totlen]); | |
d102d9df | 835 | totlen += pipelens[j]; |
0f113f3e | 836 | |
d102d9df | 837 | /* |
44e58f3b MC |
838 | * we now 'read' from thiswr->input, thiswr->length bytes into |
839 | * thiswr->data | |
d102d9df | 840 | */ |
0f113f3e | 841 | |
d102d9df MC |
842 | /* first we compress */ |
843 | if (s->compress != NULL) { | |
44e58f3b MC |
844 | if (!ssl3_do_compress(s, thiswr) |
845 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { | |
d102d9df MC |
846 | SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); |
847 | goto err; | |
848 | } | |
849 | } else { | |
44e58f3b | 850 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { |
c7c42022 MC |
851 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
852 | goto err; | |
853 | } | |
d102d9df MC |
854 | SSL3_RECORD_reset_input(&wr[j]); |
855 | } | |
0f113f3e | 856 | |
49e7fe12 | 857 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { |
cf72c757 | 858 | size_t rlen, max_send_fragment; |
c649d10d | 859 | |
44e58f3b | 860 | if (!WPACKET_put_bytes_u8(thispkt, type)) { |
e60ce9c4 MC |
861 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
862 | goto err; | |
863 | } | |
44e58f3b | 864 | SSL3_RECORD_add_length(thiswr, 1); |
c649d10d TS |
865 | |
866 | /* Add TLS1.3 padding */ | |
cf72c757 | 867 | max_send_fragment = ssl_get_max_send_fragment(s); |
96c9aee2 | 868 | rlen = SSL3_RECORD_get_length(thiswr); |
cf72c757 | 869 | if (rlen < max_send_fragment) { |
96c9aee2 | 870 | size_t padding = 0; |
cf72c757 | 871 | size_t max_padding = max_send_fragment - rlen; |
96c9aee2 TS |
872 | if (s->record_padding_cb != NULL) { |
873 | padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg); | |
874 | } else if (s->block_padding > 0) { | |
875 | size_t mask = s->block_padding - 1; | |
876 | size_t remainder; | |
877 | ||
878 | /* optimize for power of 2 */ | |
879 | if ((s->block_padding & mask) == 0) | |
880 | remainder = rlen & mask; | |
881 | else | |
882 | remainder = rlen % s->block_padding; | |
883 | /* don't want to add a block of padding if we don't have to */ | |
884 | if (remainder == 0) | |
885 | padding = 0; | |
886 | else | |
887 | padding = s->block_padding - remainder; | |
888 | } | |
889 | if (padding > 0) { | |
890 | /* do not allow the record to exceed max plaintext length */ | |
891 | if (padding > max_padding) | |
892 | padding = max_padding; | |
893 | if (!WPACKET_memset(thispkt, 0, padding)) { | |
894 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
895 | goto err; | |
896 | } | |
897 | SSL3_RECORD_add_length(thiswr, padding); | |
c649d10d | 898 | } |
c649d10d | 899 | } |
e60ce9c4 MC |
900 | } |
901 | ||
0f113f3e | 902 | /* |
44e58f3b MC |
903 | * we should still have the output to thiswr->data and the input from |
904 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
905 | * in the wb->buf | |
0f113f3e | 906 | */ |
0f113f3e | 907 | |
28a31a0a | 908 | if (!SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
909 | unsigned char *mac; |
910 | ||
44e58f3b MC |
911 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
912 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c7c42022 | 913 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
d102d9df | 914 | goto err; |
c7c42022 MC |
915 | } |
916 | } | |
917 | ||
918 | /* | |
919 | * Reserve some bytes for any growth that may occur during encryption. | |
920 | * This will be at most one cipher block or the tag length if using | |
921 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
922 | */ | |
f479eab2 F |
923 | if (!WPACKET_reserve_bytes(thispkt, SSL_RT_MAX_CIPHER_BLOCK_SIZE, |
924 | NULL) | |
c7c42022 MC |
925 | /* |
926 | * We also need next the amount of bytes written to this | |
927 | * sub-packet | |
928 | */ | |
44e58f3b | 929 | || !WPACKET_get_length(thispkt, &len)) { |
c7c42022 MC |
930 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
931 | goto err; | |
d102d9df | 932 | } |
0f113f3e | 933 | |
c7c42022 | 934 | /* Get a pointer to the start of this record excluding header */ |
44e58f3b | 935 | recordstart = WPACKET_get_curr(thispkt) - len; |
c7c42022 | 936 | |
44e58f3b MC |
937 | SSL3_RECORD_set_data(thiswr, recordstart); |
938 | SSL3_RECORD_reset_input(thiswr); | |
939 | SSL3_RECORD_set_length(thiswr, len); | |
0f113f3e MC |
940 | } |
941 | ||
ef6c191b MC |
942 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
943 | || s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY) { | |
49e7fe12 MC |
944 | /* |
945 | * We haven't actually negotiated the version yet, but we're trying to | |
3519bae5 | 946 | * send early data - so we need to use the tls13enc function. |
49e7fe12 MC |
947 | */ |
948 | if (tls13_enc(s, wr, numpipes, 1) < 1) | |
949 | goto err; | |
950 | } else { | |
951 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) | |
952 | goto err; | |
953 | } | |
0f113f3e | 954 | |
a230b26e | 955 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
956 | size_t origlen; |
957 | ||
44e58f3b MC |
958 | thispkt = &pkt[j]; |
959 | thiswr = &wr[j]; | |
960 | ||
c7c42022 | 961 | /* Allocate bytes for the encryption overhead */ |
44e58f3b | 962 | if (!WPACKET_get_length(thispkt, &origlen) |
c7c42022 | 963 | /* Encryption should never shrink the data! */ |
44e58f3b MC |
964 | || origlen > thiswr->length |
965 | || (thiswr->length > origlen | |
966 | && !WPACKET_allocate_bytes(thispkt, | |
967 | thiswr->length - origlen, NULL))) { | |
c7c42022 MC |
968 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
969 | goto err; | |
970 | } | |
28a31a0a | 971 | if (SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
972 | unsigned char *mac; |
973 | ||
44e58f3b MC |
974 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
975 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c7c42022 | 976 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
d102d9df | 977 | goto err; |
c7c42022 | 978 | } |
44e58f3b | 979 | SSL3_RECORD_add_length(thiswr, mac_size); |
d102d9df | 980 | } |
0f113f3e | 981 | |
44e58f3b MC |
982 | if (!WPACKET_get_length(thispkt, &len) |
983 | || !WPACKET_close(thispkt)) { | |
c7c42022 MC |
984 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
985 | goto err; | |
986 | } | |
d102d9df | 987 | |
c7c42022 | 988 | if (s->msg_callback) { |
44e58f3b | 989 | recordstart = WPACKET_get_curr(thispkt) - len |
c7c42022 MC |
990 | - SSL3_RT_HEADER_LENGTH; |
991 | s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, | |
992 | SSL3_RT_HEADER_LENGTH, s, | |
d102d9df | 993 | s->msg_callback_arg); |
ad5100bc MC |
994 | |
995 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { | |
996 | unsigned char ctype = type; | |
997 | ||
998 | s->msg_callback(1, s->version, SSL3_RT_INNER_CONTENT_TYPE, | |
999 | &ctype, 1, s, s->msg_callback_arg); | |
1000 | } | |
c7c42022 MC |
1001 | } |
1002 | ||
44e58f3b | 1003 | if (!WPACKET_finish(thispkt)) { |
c7c42022 MC |
1004 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
1005 | goto err; | |
1006 | } | |
0f113f3e | 1007 | |
0f113f3e | 1008 | /* |
44e58f3b MC |
1009 | * we should now have thiswr->data pointing to the encrypted data, which |
1010 | * is thiswr->length long | |
0f113f3e | 1011 | */ |
44e58f3b | 1012 | SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for |
a230b26e | 1013 | * debugging */ |
44e58f3b | 1014 | SSL3_RECORD_add_length(thiswr, SSL3_RT_HEADER_LENGTH); |
d102d9df MC |
1015 | |
1016 | if (create_empty_fragment) { | |
1017 | /* | |
1018 | * we are in a recursive call; just return the length, don't write | |
1019 | * out anything here | |
1020 | */ | |
1021 | if (j > 0) { | |
1022 | /* We should never be pipelining an empty fragment!! */ | |
1023 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
1024 | goto err; | |
1025 | } | |
44e58f3b | 1026 | *written = SSL3_RECORD_get_length(thiswr); |
7ee8627f | 1027 | return 1; |
d102d9df MC |
1028 | } |
1029 | ||
1030 | /* now let's set up wb */ | |
1031 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
44e58f3b | 1032 | prefix_len + SSL3_RECORD_get_length(thiswr)); |
0f113f3e MC |
1033 | } |
1034 | ||
0f113f3e MC |
1035 | /* |
1036 | * memorize arguments so that ssl3_write_pending can detect bad write | |
1037 | * retries later | |
1038 | */ | |
d102d9df | 1039 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
1040 | s->rlayer.wpend_buf = buf; |
1041 | s->rlayer.wpend_type = type; | |
d102d9df | 1042 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
1043 | |
1044 | /* we now just need to write the buffer */ | |
7ee8627f | 1045 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e | 1046 | err: |
c7c42022 MC |
1047 | for (j = 0; j < wpinited; j++) |
1048 | WPACKET_cleanup(&pkt[j]); | |
0f113f3e MC |
1049 | return -1; |
1050 | } | |
d02b48c6 | 1051 | |
4880672a MC |
1052 | /* if s->s3->wbuf.left != 0, we need to call this |
1053 | * | |
beacb0f0 | 1054 | * Return values are as per SSL_write() |
4880672a | 1055 | */ |
7ee8627f MC |
1056 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, |
1057 | size_t *written) | |
0f113f3e MC |
1058 | { |
1059 | int i; | |
d102d9df | 1060 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
7ee8627f | 1061 | size_t currbuf = 0; |
f0ca8f89 | 1062 | size_t tmpwrit = 0; |
d02b48c6 | 1063 | |
7ee8627f | 1064 | if ((s->rlayer.wpend_tot > len) |
f8caa3c8 | 1065 | || ((s->rlayer.wpend_buf != buf) && |
0f113f3e | 1066 | !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) |
f8caa3c8 | 1067 | || (s->rlayer.wpend_type != type)) { |
0f113f3e | 1068 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
7ee8627f | 1069 | return -1; |
0f113f3e MC |
1070 | } |
1071 | ||
1072 | for (;;) { | |
d102d9df MC |
1073 | /* Loop until we find a buffer we haven't written out yet */ |
1074 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 1075 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
1076 | currbuf++; |
1077 | continue; | |
1078 | } | |
0f113f3e MC |
1079 | clear_sys_error(); |
1080 | if (s->wbio != NULL) { | |
1081 | s->rwstate = SSL_WRITING; | |
7ee8627f | 1082 | /* TODO(size_t): Convert this call */ |
a230b26e EK |
1083 | i = BIO_write(s->wbio, (char *) |
1084 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
1085 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1086 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
7ee8627f MC |
1087 | if (i >= 0) |
1088 | tmpwrit = i; | |
0f113f3e MC |
1089 | } else { |
1090 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); | |
1091 | i = -1; | |
1092 | } | |
7ee8627f | 1093 | if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { |
d102d9df | 1094 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
7ee8627f | 1095 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
d102d9df MC |
1096 | if (currbuf + 1 < s->rlayer.numwpipes) |
1097 | continue; | |
0f113f3e | 1098 | s->rwstate = SSL_NOTHING; |
7ee8627f MC |
1099 | *written = s->rlayer.wpend_ret; |
1100 | return 1; | |
0f113f3e | 1101 | } else if (i <= 0) { |
5e8b24db | 1102 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1103 | /* |
1104 | * For DTLS, just drop it. That's kind of the whole point in | |
1105 | * using a datagram service | |
1106 | */ | |
d102d9df | 1107 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 1108 | } |
26a7d938 | 1109 | return i; |
0f113f3e | 1110 | } |
7ee8627f MC |
1111 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
1112 | SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); | |
0f113f3e MC |
1113 | } |
1114 | } | |
d02b48c6 | 1115 | |
1d97c843 TH |
1116 | /*- |
1117 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1118 | * 'type' is one of the following: |
1119 | * | |
1120 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1121 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1122 | * - 0 (during a shutdown, no data has to be returned) | |
1123 | * | |
1124 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1125 | * (possibly multiple records if we still don't have anything to return). | |
1126 | * | |
1127 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1128 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1129 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1130 | * argument is non NULL. | |
b35e9050 BM |
1131 | * Also if record payloads contain fragments too small to process, we store |
1132 | * them until there is enough for the respective protocol (the record protocol | |
1133 | * may use arbitrary fragmentation and even interleaving): | |
1134 | * Change cipher spec protocol | |
1135 | * just 1 byte needed, no need for keeping anything stored | |
1136 | * Alert protocol | |
1137 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1138 | * Handshake protocol | |
1139 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1140 | * to detect unexpected Client Hello and Hello Request messages | |
1141 | * here, anything else is handled by higher layers | |
1142 | * Application data protocol | |
1143 | * none of our business | |
1144 | */ | |
657da85e | 1145 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
54105ddd | 1146 | size_t len, int peek, size_t *readbytes) |
0f113f3e MC |
1147 | { |
1148 | int al, i, j, ret; | |
54105ddd | 1149 | size_t n, curr_rec, num_recs, totalbytes; |
0f113f3e | 1150 | SSL3_RECORD *rr; |
94777c9c | 1151 | SSL3_BUFFER *rbuf; |
0f113f3e MC |
1152 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
1153 | ||
94777c9c MC |
1154 | rbuf = &s->rlayer.rbuf; |
1155 | ||
1156 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1157 | /* Not initialized yet */ |
0f113f3e | 1158 | if (!ssl3_setup_read_buffer(s)) |
eda75751 | 1159 | return -1; |
28d59af8 | 1160 | } |
0f113f3e MC |
1161 | |
1162 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1163 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1164 | && (type != | |
1165 | SSL3_RT_APPLICATION_DATA))) { | |
1166 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1167 | return -1; | |
1168 | } | |
1169 | ||
4aa7389e | 1170 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1171 | /* (partially) satisfy request from storage */ |
1172 | { | |
4aa7389e | 1173 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1174 | unsigned char *dst = buf; |
1175 | unsigned int k; | |
1176 | ||
1177 | /* peek == 0 */ | |
1178 | n = 0; | |
4aa7389e | 1179 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1180 | *dst++ = *src++; |
1181 | len--; | |
4aa7389e | 1182 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1183 | n++; |
1184 | } | |
1185 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1186 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1187 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1188 | |
1189 | if (recvd_type != NULL) | |
1190 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1191 | ||
54105ddd | 1192 | *readbytes = n; |
eda75751 | 1193 | return 1; |
0f113f3e MC |
1194 | } |
1195 | ||
1196 | /* | |
4aa7389e | 1197 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1198 | */ |
1199 | ||
024f543c | 1200 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1201 | /* type == SSL3_RT_APPLICATION_DATA */ |
1202 | i = s->handshake_func(s); | |
1203 | if (i < 0) | |
eda75751 | 1204 | return i; |
0f113f3e MC |
1205 | if (i == 0) { |
1206 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1207 | return -1; |
0f113f3e MC |
1208 | } |
1209 | } | |
1210 | start: | |
1211 | s->rwstate = SSL_NOTHING; | |
1212 | ||
50e735f9 | 1213 | /*- |
94777c9c MC |
1214 | * For each record 'i' up to |num_recs] |
1215 | * rr[i].type - is the type of record | |
1216 | * rr[i].data, - data | |
1217 | * rr[i].off, - offset into 'data' for next read | |
1218 | * rr[i].length, - number of bytes. | |
50e735f9 | 1219 | */ |
94777c9c MC |
1220 | rr = s->rlayer.rrec; |
1221 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1222 | ||
1223 | do { | |
1224 | /* get new records if necessary */ | |
1225 | if (num_recs == 0) { | |
1226 | ret = ssl3_get_record(s); | |
1227 | if (ret <= 0) | |
eda75751 | 1228 | return ret; |
94777c9c MC |
1229 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); |
1230 | if (num_recs == 0) { | |
1231 | /* Shouldn't happen */ | |
1232 | al = SSL_AD_INTERNAL_ERROR; | |
1233 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1234 | goto f_err; | |
1235 | } | |
1236 | } | |
255cfeac | 1237 | /* Skip over any records we have already read */ |
94777c9c | 1238 | for (curr_rec = 0; |
255cfeac | 1239 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1240 | curr_rec++) ; |
94777c9c MC |
1241 | if (curr_rec == num_recs) { |
1242 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1243 | num_recs = 0; | |
1244 | curr_rec = 0; | |
1245 | } | |
1246 | } while (num_recs == 0); | |
1247 | rr = &rr[curr_rec]; | |
0f113f3e | 1248 | |
af58be76 MC |
1249 | /* |
1250 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1251 | * record that isn't an alert. | |
1252 | */ | |
1253 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1254 | && SSL3_RECORD_get_length(rr) != 0) | |
1255 | s->rlayer.alert_count = 0; | |
1256 | ||
0f113f3e MC |
1257 | /* we now have a packet which can be read and processed */ |
1258 | ||
1259 | if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, | |
1260 | * reset by ssl3_get_finished */ | |
747e1639 | 1261 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
1262 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1263 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1264 | goto f_err; | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * If the other end has shut down, throw anything we read away (even in | |
1269 | * 'peek' mode) | |
1270 | */ | |
1271 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1272 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e | 1273 | s->rwstate = SSL_NOTHING; |
eda75751 | 1274 | return 0; |
0f113f3e MC |
1275 | } |
1276 | ||
657da85e | 1277 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e | 1278 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
97997489 MC |
1279 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL |
1280 | && !SSL_IS_TLS13(s))) { | |
657da85e MC |
1281 | /* |
1282 | * SSL3_RT_APPLICATION_DATA or | |
1283 | * SSL3_RT_HANDSHAKE or | |
1284 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1285 | */ | |
0f113f3e MC |
1286 | /* |
1287 | * make sure that we are not getting application data when we are | |
1288 | * doing a handshake for the first time | |
1289 | */ | |
1290 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1291 | (s->enc_read_ctx == NULL)) { | |
1292 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1293 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE); | |
1294 | goto f_err; | |
1295 | } | |
1296 | ||
657da85e | 1297 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1298 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1299 | && s->rlayer.handshake_fragment_len > 0) { | |
657da85e MC |
1300 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1301 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1302 | goto f_err; | |
1303 | } | |
1304 | ||
1305 | if (recvd_type != NULL) | |
1306 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1307 | ||
1c47d35a MC |
1308 | if (len == 0) { |
1309 | /* | |
1310 | * Mark a zero length record as read. This ensures multiple calls to | |
1311 | * SSL_read() with a zero length buffer will eventually cause | |
1312 | * SSL_pending() to report data as being available. | |
1313 | */ | |
1314 | if (SSL3_RECORD_get_length(rr) == 0) | |
1315 | SSL3_RECORD_set_read(rr); | |
eda75751 | 1316 | return 0; |
1c47d35a | 1317 | } |
0f113f3e | 1318 | |
54105ddd | 1319 | totalbytes = 0; |
94777c9c | 1320 | do { |
54105ddd | 1321 | if (len - totalbytes > SSL3_RECORD_get_length(rr)) |
94777c9c MC |
1322 | n = SSL3_RECORD_get_length(rr); |
1323 | else | |
54105ddd | 1324 | n = len - totalbytes; |
94777c9c MC |
1325 | |
1326 | memcpy(buf, &(rr->data[rr->off]), n); | |
1327 | buf += n; | |
b8d24395 MC |
1328 | if (peek) { |
1329 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1330 | if (SSL3_RECORD_get_length(rr) == 0) | |
1331 | SSL3_RECORD_set_read(rr); | |
1332 | } else { | |
753be41d | 1333 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1334 | SSL3_RECORD_add_off(rr, n); |
1335 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1336 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1337 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1338 | SSL3_RECORD_set_read(rr); |
94777c9c | 1339 | } |
0f113f3e | 1340 | } |
94777c9c MC |
1341 | if (SSL3_RECORD_get_length(rr) == 0 |
1342 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1343 | curr_rec++; | |
1344 | rr++; | |
1345 | } | |
54105ddd | 1346 | totalbytes += n; |
94777c9c | 1347 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs |
54105ddd MC |
1348 | && totalbytes < len); |
1349 | if (totalbytes == 0) { | |
255cfeac MC |
1350 | /* We must have read empty records. Get more data */ |
1351 | goto start; | |
1352 | } | |
94777c9c | 1353 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1354 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1355 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c | 1356 | ssl3_release_read_buffer(s); |
54105ddd | 1357 | *readbytes = totalbytes; |
eda75751 | 1358 | return 1; |
0f113f3e MC |
1359 | } |
1360 | ||
1361 | /* | |
1362 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1363 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1364 | * were actually expecting a CCS). | |
0f113f3e MC |
1365 | */ |
1366 | ||
32ec4153 MC |
1367 | /* |
1368 | * Lets just double check that we've not got an SSLv2 record | |
1369 | */ | |
1370 | if (rr->rec_version == SSL2_VERSION) { | |
1371 | /* | |
1372 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1373 | * record back if this is the first packet and we are looking for an | |
1374 | * initial ClientHello. Therefore |type| should always be equal to | |
1375 | * |rr->type|. If not then something has gone horribly wrong | |
1376 | */ | |
1377 | al = SSL_AD_INTERNAL_ERROR; | |
1378 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1379 | goto f_err; | |
1380 | } | |
1381 | ||
e8aa8b6c | 1382 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1383 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1384 | /* |
1385 | * If we've got this far and still haven't decided on what version | |
1386 | * we're using then this must be a client side alert we're dealing with | |
1387 | * (we don't allow heartbeats yet). We shouldn't be receiving anything | |
1388 | * other than a ClientHello if we are a server. | |
1389 | */ | |
1390 | s->version = rr->rec_version; | |
1391 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1392 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1393 | goto f_err; | |
1394 | } | |
1395 | ||
0f113f3e MC |
1396 | /* |
1397 | * In case of record types for which we have 'fragment' storage, fill | |
1398 | * that so that we can process the data at a fixed place. | |
1399 | */ | |
1400 | { | |
eda75751 | 1401 | size_t dest_maxlen = 0; |
0f113f3e | 1402 | unsigned char *dest = NULL; |
eda75751 | 1403 | size_t *dest_len = NULL; |
0f113f3e | 1404 | |
747e1639 | 1405 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
4aa7389e MC |
1406 | dest_maxlen = sizeof s->rlayer.handshake_fragment; |
1407 | dest = s->rlayer.handshake_fragment; | |
1408 | dest_len = &s->rlayer.handshake_fragment_len; | |
0f113f3e | 1409 | } |
b35e9050 | 1410 | |
0f113f3e MC |
1411 | if (dest_maxlen > 0) { |
1412 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
747e1639 MC |
1413 | if (SSL3_RECORD_get_length(rr) < n) |
1414 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
0f113f3e MC |
1415 | |
1416 | /* now move 'n' bytes: */ | |
ef6c191b MC |
1417 | memcpy(dest + *dest_len, |
1418 | SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n); | |
1419 | SSL3_RECORD_add_off(rr, n); | |
1420 | SSL3_RECORD_add_length(rr, -n); | |
1421 | *dest_len += n; | |
1422 | if (SSL3_RECORD_get_length(rr) == 0) | |
63916e9a | 1423 | SSL3_RECORD_set_read(rr); |
ef6c191b MC |
1424 | |
1425 | if (*dest_len < dest_maxlen) | |
0f113f3e MC |
1426 | goto start; /* fragment was too small */ |
1427 | } | |
1428 | } | |
1429 | ||
50e735f9 | 1430 | /*- |
4aa7389e | 1431 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
50e735f9 MC |
1432 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1433 | */ | |
0f113f3e | 1434 | |
0f113f3e MC |
1435 | /* |
1436 | * If we are a server and get a client hello when renegotiation isn't | |
1437 | * allowed send back a no renegotiation alert and carry on. WARNING: | |
1438 | * experimental code, needs reviewing (steve) | |
1439 | */ | |
1440 | if (s->server && | |
1441 | SSL_is_init_finished(s) && | |
0f113f3e | 1442 | (s->version > SSL3_VERSION) && |
0386aad1 | 1443 | !SSL_IS_TLS13(s) && |
db0f35dd | 1444 | (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) && |
4aa7389e MC |
1445 | (s->rlayer.handshake_fragment_len >= 4) && |
1446 | (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && | |
0f113f3e | 1447 | (s->session != NULL) && (s->session->cipher != NULL) && |
db0f35dd TS |
1448 | ((!s->s3->send_connection_binding && |
1449 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) || | |
1450 | (s->options & SSL_OP_NO_RENEGOTIATION))) { | |
747e1639 | 1451 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1452 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
1453 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); |
1454 | goto start; | |
1455 | } | |
bd990e25 MC |
1456 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
1457 | unsigned int alert_level, alert_descr; | |
1458 | unsigned char *alert_bytes = SSL3_RECORD_get_data(rr) | |
1459 | + SSL3_RECORD_get_off(rr); | |
1460 | PACKET alert; | |
1461 | ||
1462 | if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr)) | |
1463 | || !PACKET_get_1(&alert, &alert_level) | |
1464 | || !PACKET_get_1(&alert, &alert_descr) | |
1465 | || PACKET_remaining(&alert) != 0) { | |
1466 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1467 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_INVALID_ALERT); | |
1468 | goto f_err; | |
1469 | } | |
0f113f3e MC |
1470 | |
1471 | if (s->msg_callback) | |
bd990e25 | 1472 | s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, |
4aa7389e | 1473 | s->msg_callback_arg); |
0f113f3e MC |
1474 | |
1475 | if (s->info_callback != NULL) | |
1476 | cb = s->info_callback; | |
1477 | else if (s->ctx->info_callback != NULL) | |
1478 | cb = s->ctx->info_callback; | |
1479 | ||
1480 | if (cb != NULL) { | |
1481 | j = (alert_level << 8) | alert_descr; | |
1482 | cb(s, SSL_CB_READ_ALERT, j); | |
1483 | } | |
1484 | ||
fd865cad | 1485 | if (alert_level == SSL3_AL_WARNING) { |
0f113f3e | 1486 | s->s3->warn_alert = alert_descr; |
63916e9a | 1487 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1488 | |
1489 | s->rlayer.alert_count++; | |
1490 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
1491 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1492 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); | |
1493 | goto f_err; | |
1494 | } | |
1495 | ||
0f113f3e MC |
1496 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { |
1497 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
eda75751 | 1498 | return 0; |
0f113f3e | 1499 | } |
f66f8a44 MC |
1500 | /* |
1501 | * Apart from close_notify the only other warning alert in TLSv1.3 | |
1502 | * is user_cancelled - which we just ignore. | |
1503 | */ | |
1504 | if (SSL_IS_TLS13(s) && alert_descr != SSL_AD_USER_CANCELLED) { | |
1505 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1506 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1507 | goto f_err; | |
1508 | } | |
0f113f3e MC |
1509 | /* |
1510 | * This is a warning but we receive it if we requested | |
1511 | * renegotiation and the peer denied it. Terminate with a fatal | |
8483a003 | 1512 | * alert because if application tried to renegotiate it |
0f113f3e MC |
1513 | * presumably had a good reason and expects it to succeed. In |
1514 | * future we might have a renegotiation where we don't care if | |
1515 | * the peer refused it where we carry on. | |
1516 | */ | |
f66f8a44 | 1517 | if (alert_descr == SSL_AD_NO_RENEGOTIATION) { |
0f113f3e MC |
1518 | al = SSL_AD_HANDSHAKE_FAILURE; |
1519 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); | |
1520 | goto f_err; | |
1521 | } | |
fd865cad | 1522 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
1523 | char tmp[16]; |
1524 | ||
1525 | s->rwstate = SSL_NOTHING; | |
1526 | s->s3->fatal_alert = alert_descr; | |
1527 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); | |
1528 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
1529 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
1530 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1531 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1532 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 1533 | return 0; |
0f113f3e MC |
1534 | } else { |
1535 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1536 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1537 | goto f_err; | |
1538 | } | |
1539 | ||
1540 | goto start; | |
1541 | } | |
1542 | ||
1543 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
1544 | * shutdown */ | |
1545 | s->rwstate = SSL_NOTHING; | |
747e1639 | 1546 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1547 | SSL3_RECORD_set_read(rr); |
eda75751 | 1548 | return 0; |
0f113f3e MC |
1549 | } |
1550 | ||
747e1639 | 1551 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
657da85e MC |
1552 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1553 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1554 | goto f_err; | |
0f113f3e MC |
1555 | } |
1556 | ||
1557 | /* | |
c7f47786 | 1558 | * Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or |
0386aad1 | 1559 | * protocol violation) |
0f113f3e | 1560 | */ |
024f543c | 1561 | if ((s->rlayer.handshake_fragment_len >= 4) |
c7f47786 | 1562 | && !ossl_statem_get_in_handshake(s)) { |
39ef7821 MC |
1563 | int ined = (s->early_data_state == SSL_EARLY_DATA_READING); |
1564 | ||
c7f47786 MC |
1565 | /* We found handshake data, so we're going back into init */ |
1566 | ossl_statem_set_in_init(s, 1); | |
1567 | ||
0f113f3e MC |
1568 | i = s->handshake_func(s); |
1569 | if (i < 0) | |
eda75751 | 1570 | return i; |
0f113f3e MC |
1571 | if (i == 0) { |
1572 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1573 | return -1; |
0f113f3e MC |
1574 | } |
1575 | ||
39ef7821 MC |
1576 | /* |
1577 | * If we were actually trying to read early data and we found a | |
1578 | * handshake message, then we don't want to continue to try and read | |
1579 | * the application data any more. It won't be "early" now. | |
1580 | */ | |
1581 | if (ined) | |
1582 | return -1; | |
1583 | ||
0f113f3e | 1584 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { |
94777c9c | 1585 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1586 | /* no read-ahead left? */ |
0f113f3e MC |
1587 | BIO *bio; |
1588 | /* | |
1589 | * In the case where we try to read application data, but we | |
1590 | * trigger an SSL handshake, we return -1 with the retry | |
1591 | * option set. Otherwise renegotiation may cause nasty | |
1592 | * problems in the blocking world | |
1593 | */ | |
1594 | s->rwstate = SSL_READING; | |
1595 | bio = SSL_get_rbio(s); | |
1596 | BIO_clear_retry_flags(bio); | |
1597 | BIO_set_retry_read(bio); | |
eda75751 | 1598 | return -1; |
0f113f3e MC |
1599 | } |
1600 | } | |
1601 | goto start; | |
1602 | } | |
1603 | ||
747e1639 | 1604 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1605 | default: |
0f113f3e | 1606 | /* |
436a2a01 MC |
1607 | * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but |
1608 | * TLS 1.2 says you MUST send an unexpected message alert. We use the | |
1609 | * TLS 1.2 behaviour for all protocol versions to prevent issues where | |
1610 | * no progress is being made and the peer continually sends unrecognised | |
1611 | * record types, using up resources processing them. | |
0f113f3e | 1612 | */ |
0f113f3e MC |
1613 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1614 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1615 | goto f_err; | |
1616 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
1617 | case SSL3_RT_ALERT: | |
1618 | case SSL3_RT_HANDSHAKE: | |
1619 | /* | |
1620 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1621 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1622 | * that should not happen when type != rr->type | |
0f113f3e MC |
1623 | */ |
1624 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1625 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1626 | goto f_err; | |
1627 | case SSL3_RT_APPLICATION_DATA: | |
1628 | /* | |
1629 | * At this point, we were expecting handshake data, but have | |
1630 | * application data. If the library was running inside ssl3_read() | |
1631 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1632 | * application data at this point (session renegotiation not yet | |
1633 | * started), we will indulge it. | |
1634 | */ | |
fe3a3291 | 1635 | if (ossl_statem_app_data_allowed(s)) { |
0f113f3e | 1636 | s->s3->in_read_app_data = 2; |
eda75751 | 1637 | return -1; |
a832b5ef MC |
1638 | } else if (ossl_statem_skip_early_data(s)) { |
1639 | /* | |
1640 | * This can happen after a client sends a CH followed by early_data, | |
1641 | * but the server responds with a HelloRetryRequest. The server | |
1642 | * reads the next record from the client expecting to find a | |
1643 | * plaintext ClientHello but gets a record which appears to be | |
1644 | * application data. The trial decrypt "works" because null | |
1645 | * decryption was applied. We just skip it and move on to the next | |
1646 | * record. | |
1647 | */ | |
1648 | if (!early_data_count_ok(s, rr->length, | |
1649 | EARLY_DATA_CIPHERTEXT_OVERHEAD, &al)) | |
1650 | goto f_err; | |
1651 | SSL3_RECORD_set_read(rr); | |
1652 | goto start; | |
0f113f3e MC |
1653 | } else { |
1654 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1655 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1656 | goto f_err; | |
1657 | } | |
1658 | } | |
1659 | /* not reached */ | |
1660 | ||
1661 | f_err: | |
1662 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
eda75751 | 1663 | return -1; |
0f113f3e | 1664 | } |
d02b48c6 | 1665 | |
14daae5a MC |
1666 | void ssl3_record_sequence_update(unsigned char *seq) |
1667 | { | |
1668 | int i; | |
1669 | ||
1670 | for (i = 7; i >= 0; i--) { | |
1671 | ++seq[i]; | |
1672 | if (seq[i] != 0) | |
1673 | break; | |
1674 | } | |
1675 | } | |
1676 | ||
d45ba43d MC |
1677 | /* |
1678 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1679 | * format and false otherwise. | |
1680 | */ | |
32ec4153 MC |
1681 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1682 | { | |
94777c9c | 1683 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1684 | } |
0f113f3e | 1685 | |
d45ba43d MC |
1686 | /* |
1687 | * Returns the length in bytes of the current rrec | |
1688 | */ | |
eda75751 | 1689 | size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1690 | { |
94777c9c | 1691 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1692 | } |