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Commit | Line | Data |
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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 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 RE |
12 | #include <errno.h> |
13 | #define USE_SOCKETS | |
999005e4 | 14 | #include "../ssl_locl.h" |
ec577822 BM |
15 | #include <openssl/evp.h> |
16 | #include <openssl/buffer.h> | |
637f374a | 17 | #include <openssl/rand.h> |
c99c4c11 | 18 | #include "record_locl.h" |
bd990e25 | 19 | #include "../packet_locl.h" |
d02b48c6 | 20 | |
0f113f3e MC |
21 | #if defined(OPENSSL_SMALL_FOOTPRINT) || \ |
22 | !( defined(AES_ASM) && ( \ | |
23 | defined(__x86_64) || defined(__x86_64__) || \ | |
fbaf30d0 | 24 | defined(_M_AMD64) || defined(_M_X64) ) \ |
0f113f3e | 25 | ) |
a9c6edcd AP |
26 | # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
27 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
28 | #endif | |
29 | ||
c036e210 MC |
30 | void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s) |
31 | { | |
32 | rl->s = s; | |
78fcddbb | 33 | RECORD_LAYER_set_first_record(&s->rlayer); |
94777c9c | 34 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
c036e210 MC |
35 | } |
36 | ||
af9752e5 MC |
37 | void RECORD_LAYER_clear(RECORD_LAYER *rl) |
38 | { | |
6b41b3f5 | 39 | rl->rstate = SSL_ST_READ_HEADER; |
af9752e5 | 40 | |
a230b26e EK |
41 | /* |
42 | * Do I need to clear read_ahead? As far as I can tell read_ahead did not | |
af9752e5 MC |
43 | * previously get reset by SSL_clear...so I'll keep it that way..but is |
44 | * that right? | |
45 | */ | |
6b41b3f5 MC |
46 | |
47 | rl->packet = NULL; | |
48 | rl->packet_length = 0; | |
49 | rl->wnum = 0; | |
6b41b3f5 MC |
50 | memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); |
51 | rl->handshake_fragment_len = 0; | |
52 | rl->wpend_tot = 0; | |
53 | rl->wpend_type = 0; | |
54 | rl->wpend_ret = 0; | |
55 | rl->wpend_buf = NULL; | |
56 | ||
57 | SSL3_BUFFER_clear(&rl->rbuf); | |
4bf08600 | 58 | ssl3_release_write_buffer(rl->s); |
0aac3a6b | 59 | rl->numrpipes = 0; |
94777c9c | 60 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
6b41b3f5 | 61 | |
95cdad63 MC |
62 | RECORD_LAYER_reset_read_sequence(rl); |
63 | RECORD_LAYER_reset_write_sequence(rl); | |
0485d540 | 64 | |
6b41b3f5 | 65 | if (rl->d) |
5fb6f80c | 66 | DTLS_RECORD_LAYER_clear(rl); |
af9752e5 MC |
67 | } |
68 | ||
f161995e MC |
69 | void RECORD_LAYER_release(RECORD_LAYER *rl) |
70 | { | |
71 | if (SSL3_BUFFER_is_initialised(&rl->rbuf)) | |
72 | ssl3_release_read_buffer(rl->s); | |
d102d9df | 73 | if (rl->numwpipes > 0) |
f161995e | 74 | ssl3_release_write_buffer(rl->s); |
94777c9c | 75 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
f161995e MC |
76 | } |
77 | ||
b8c49611 | 78 | /* Checks if we have unprocessed read ahead data pending */ |
49580f25 | 79 | int RECORD_LAYER_read_pending(const RECORD_LAYER *rl) |
f161995e MC |
80 | { |
81 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; | |
82 | } | |
83 | ||
b8c49611 MC |
84 | /* Checks if we have decrypted unread record data pending */ |
85 | int RECORD_LAYER_processed_read_pending(const RECORD_LAYER *rl) | |
86 | { | |
87 | size_t curr_rec = 0, num_recs = RECORD_LAYER_get_numrpipes(rl); | |
88 | const SSL3_RECORD *rr = rl->rrec; | |
89 | ||
90 | while (curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec])) | |
91 | curr_rec++; | |
92 | ||
93 | return curr_rec < num_recs; | |
94 | } | |
95 | ||
49580f25 | 96 | int RECORD_LAYER_write_pending(const RECORD_LAYER *rl) |
f161995e | 97 | { |
d102d9df | 98 | return (rl->numwpipes > 0) |
a230b26e | 99 | && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0; |
f161995e MC |
100 | } |
101 | ||
de07f311 MC |
102 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
103 | { | |
95cdad63 | 104 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
105 | } |
106 | ||
107 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
108 | { | |
95cdad63 | 109 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
110 | } |
111 | ||
8b0e934a | 112 | size_t ssl3_pending(const SSL *s) |
d5a25ae0 | 113 | { |
8b0e934a | 114 | size_t i, num = 0; |
94777c9c | 115 | |
295c3f41 | 116 | if (s->rlayer.rstate == SSL_ST_READ_BODY) |
d5a25ae0 MC |
117 | return 0; |
118 | ||
94777c9c MC |
119 | for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { |
120 | if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) | |
a230b26e | 121 | != SSL3_RT_APPLICATION_DATA) |
94777c9c MC |
122 | return 0; |
123 | num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); | |
124 | } | |
125 | ||
126 | return num; | |
d5a25ae0 MC |
127 | } |
128 | ||
dad78fb1 MC |
129 | void SSL_CTX_set_default_read_buffer_len(SSL_CTX *ctx, size_t len) |
130 | { | |
131 | ctx->default_read_buf_len = len; | |
132 | } | |
133 | ||
134 | void SSL_set_default_read_buffer_len(SSL *s, size_t len) | |
135 | { | |
136 | SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s->rlayer), len); | |
137 | } | |
138 | ||
295c3f41 MC |
139 | const char *SSL_rstate_string_long(const SSL *s) |
140 | { | |
295c3f41 MC |
141 | switch (s->rlayer.rstate) { |
142 | case SSL_ST_READ_HEADER: | |
475965f2 | 143 | return "read header"; |
295c3f41 | 144 | case SSL_ST_READ_BODY: |
475965f2 | 145 | return "read body"; |
295c3f41 | 146 | case SSL_ST_READ_DONE: |
475965f2 | 147 | return "read done"; |
295c3f41 | 148 | default: |
475965f2 | 149 | return "unknown"; |
295c3f41 | 150 | } |
295c3f41 MC |
151 | } |
152 | ||
153 | const char *SSL_rstate_string(const SSL *s) | |
154 | { | |
295c3f41 MC |
155 | switch (s->rlayer.rstate) { |
156 | case SSL_ST_READ_HEADER: | |
475965f2 | 157 | return "RH"; |
295c3f41 | 158 | case SSL_ST_READ_BODY: |
475965f2 | 159 | return "RB"; |
295c3f41 | 160 | case SSL_ST_READ_DONE: |
475965f2 | 161 | return "RD"; |
295c3f41 | 162 | default: |
475965f2 | 163 | return "unknown"; |
295c3f41 | 164 | } |
295c3f41 MC |
165 | } |
166 | ||
4880672a | 167 | /* |
beacb0f0 | 168 | * Return values are as per SSL_read() |
4880672a | 169 | */ |
8e6d03ca | 170 | int ssl3_read_n(SSL *s, size_t n, size_t max, int extend, int clearold, |
54105ddd | 171 | size_t *readbytes) |
0f113f3e MC |
172 | { |
173 | /* | |
174 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
175 | * packet by another n bytes. The packet will be in the sub-array of | |
176 | * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If | |
52e1d7b1 | 177 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 178 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
179 | * if clearold == 1, move the packet to the start of the buffer; if |
180 | * clearold == 0 then leave any old packets where they were | |
0f113f3e | 181 | */ |
8e6d03ca | 182 | size_t len, left, align = 0; |
0f113f3e MC |
183 | unsigned char *pkt; |
184 | SSL3_BUFFER *rb; | |
185 | ||
8e6d03ca MC |
186 | if (n == 0) |
187 | return 0; | |
0f113f3e | 188 | |
88c23039 | 189 | rb = &s->rlayer.rbuf; |
0f113f3e MC |
190 | if (rb->buf == NULL) |
191 | if (!ssl3_setup_read_buffer(s)) | |
192 | return -1; | |
193 | ||
194 | left = rb->left; | |
a4d64c7f | 195 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 | 196 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
753be41d | 197 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 198 | #endif |
d02b48c6 | 199 | |
0f113f3e MC |
200 | if (!extend) { |
201 | /* start with empty packet ... */ | |
202 | if (left == 0) | |
203 | rb->offset = align; | |
204 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
205 | /* | |
206 | * check if next packet length is large enough to justify payload | |
207 | * alignment... | |
208 | */ | |
209 | pkt = rb->buf + rb->offset; | |
210 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
211 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
212 | /* | |
213 | * Note that even if packet is corrupted and its length field | |
214 | * is insane, we can only be led to wrong decision about | |
215 | * whether memmove will occur or not. Header values has no | |
216 | * effect on memmove arguments and therefore no buffer | |
217 | * overrun can be triggered. | |
218 | */ | |
219 | memmove(rb->buf + align, pkt, left); | |
220 | rb->offset = align; | |
221 | } | |
222 | } | |
7a7048af MC |
223 | s->rlayer.packet = rb->buf + rb->offset; |
224 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
225 | /* ... now we can act as if 'extend' was set */ |
226 | } | |
227 | ||
a7faa6da MC |
228 | len = s->rlayer.packet_length; |
229 | pkt = rb->buf + align; | |
230 | /* | |
231 | * Move any available bytes to front of buffer: 'len' bytes already | |
232 | * pointed to by 'packet', 'left' extra ones at the end | |
233 | */ | |
234 | if (s->rlayer.packet != pkt && clearold == 1) { | |
235 | memmove(pkt, s->rlayer.packet, len + left); | |
236 | s->rlayer.packet = pkt; | |
237 | rb->offset = len + align; | |
238 | } | |
239 | ||
0f113f3e MC |
240 | /* |
241 | * For DTLS/UDP reads should not span multiple packets because the read | |
242 | * operation returns the whole packet at once (as long as it fits into | |
243 | * the buffer). | |
244 | */ | |
245 | if (SSL_IS_DTLS(s)) { | |
246 | if (left == 0 && extend) | |
247 | return 0; | |
248 | if (left > 0 && n > left) | |
249 | n = left; | |
250 | } | |
251 | ||
252 | /* if there is enough in the buffer from a previous read, take some */ | |
253 | if (left >= n) { | |
7a7048af | 254 | s->rlayer.packet_length += n; |
0f113f3e MC |
255 | rb->left = left - n; |
256 | rb->offset += n; | |
54105ddd | 257 | *readbytes = n; |
8e6d03ca | 258 | return 1; |
0f113f3e MC |
259 | } |
260 | ||
261 | /* else we need to read more data */ | |
262 | ||
ff04799d | 263 | if (n > rb->len - rb->offset) { /* does not happen */ |
0f113f3e MC |
264 | SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); |
265 | return -1; | |
266 | } | |
267 | ||
8dd4ad0f | 268 | /* We always act like read_ahead is set for DTLS */ |
4118dfdc | 269 | if (!s->rlayer.read_ahead && !SSL_IS_DTLS(s)) |
0f113f3e MC |
270 | /* ignore max parameter */ |
271 | max = n; | |
272 | else { | |
273 | if (max < n) | |
274 | max = n; | |
ff04799d | 275 | if (max > rb->len - rb->offset) |
0f113f3e MC |
276 | max = rb->len - rb->offset; |
277 | } | |
278 | ||
279 | while (left < n) { | |
f0ca8f89 | 280 | size_t bioread = 0; |
8e6d03ca MC |
281 | int ret; |
282 | ||
0f113f3e MC |
283 | /* |
284 | * Now we have len+left bytes at the front of s->s3->rbuf.buf and | |
285 | * need to read in more until we have len+n (up to len+max if | |
286 | * possible) | |
287 | */ | |
288 | ||
289 | clear_sys_error(); | |
290 | if (s->rbio != NULL) { | |
291 | s->rwstate = SSL_READING; | |
8e6d03ca MC |
292 | /* TODO(size_t): Convert this function */ |
293 | ret = BIO_read(s->rbio, pkt + len + left, max - left); | |
294 | if (ret >= 0) | |
295 | bioread = ret; | |
0f113f3e MC |
296 | } else { |
297 | SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); | |
8e6d03ca | 298 | ret = -1; |
0f113f3e MC |
299 | } |
300 | ||
8e6d03ca | 301 | if (ret <= 0) { |
0f113f3e MC |
302 | rb->left = left; |
303 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
304 | if (len + left == 0) | |
305 | ssl3_release_read_buffer(s); | |
beacb0f0 | 306 | return ret; |
0f113f3e | 307 | } |
8e6d03ca | 308 | left += bioread; |
0f113f3e MC |
309 | /* |
310 | * reads should *never* span multiple packets for DTLS because the | |
311 | * underlying transport protocol is message oriented as opposed to | |
312 | * byte oriented as in the TLS case. | |
313 | */ | |
314 | if (SSL_IS_DTLS(s)) { | |
315 | if (n > left) | |
316 | n = left; /* makes the while condition false */ | |
317 | } | |
318 | } | |
319 | ||
320 | /* done reading, now the book-keeping */ | |
321 | rb->offset += n; | |
322 | rb->left = left - n; | |
7a7048af | 323 | s->rlayer.packet_length += n; |
0f113f3e | 324 | s->rwstate = SSL_NOTHING; |
54105ddd | 325 | *readbytes = n; |
8e6d03ca | 326 | return 1; |
0f113f3e MC |
327 | } |
328 | ||
0f113f3e MC |
329 | /* |
330 | * Call this to write data in records of type 'type' It will return <= 0 if | |
331 | * not all data has been sent or non-blocking IO. | |
d02b48c6 | 332 | */ |
7ee8627f MC |
333 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len, |
334 | size_t *written) | |
0f113f3e MC |
335 | { |
336 | const unsigned char *buf = buf_; | |
7ee8627f MC |
337 | size_t tot; |
338 | size_t n, split_send_fragment, maxpipes; | |
f1f7598c | 339 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
7ee8627f | 340 | size_t max_send_fragment, nw; |
f1f7598c | 341 | #endif |
d102d9df | 342 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 343 | int i; |
7ee8627f | 344 | size_t tmpwrit; |
0f113f3e MC |
345 | |
346 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 347 | tot = s->rlayer.wnum; |
0f113f3e MC |
348 | /* |
349 | * ensure that if we end up with a smaller value of data to write out | |
350 | * than the the original len from a write which didn't complete for | |
351 | * non-blocking I/O and also somehow ended up avoiding the check for | |
352 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
353 | * possible to end up with (len-tot) as a large number that will then | |
354 | * promptly send beyond the end of the users buffer ... so we trap and | |
355 | * report the error in a way the user will notice | |
356 | */ | |
cbbe9186 RS |
357 | if ((len < s->rlayer.wnum) |
358 | || ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) { | |
0f113f3e | 359 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); |
1c2e5d56 MC |
360 | return -1; |
361 | } | |
362 | ||
7daf7156 MC |
363 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
364 | && !early_data_count_ok(s, len, 0, NULL)) | |
365 | return -1; | |
366 | ||
1c2e5d56 MC |
367 | s->rlayer.wnum = 0; |
368 | ||
59cebcf9 MC |
369 | /* |
370 | * When writing early data on the server side we could be "in_init" in | |
371 | * between receiving the EoED and the CF - but we don't want to handle those | |
372 | * messages yet. | |
373 | */ | |
374 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s) | |
375 | && s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) { | |
1c2e5d56 MC |
376 | i = s->handshake_func(s); |
377 | if (i < 0) | |
7ee8627f | 378 | return i; |
1c2e5d56 MC |
379 | if (i == 0) { |
380 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
381 | return -1; | |
382 | } | |
0f113f3e MC |
383 | } |
384 | ||
385 | /* | |
386 | * first check if there is a SSL3_BUFFER still being written out. This | |
387 | * will happen with non blocking IO | |
388 | */ | |
389 | if (wb->left != 0) { | |
7ee8627f MC |
390 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, |
391 | &tmpwrit); | |
0f113f3e MC |
392 | if (i <= 0) { |
393 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 394 | s->rlayer.wnum = tot; |
0f113f3e MC |
395 | return i; |
396 | } | |
7ee8627f | 397 | tot += tmpwrit; /* this might be last fragment */ |
0f113f3e | 398 | } |
a9c6edcd | 399 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
400 | /* |
401 | * Depending on platform multi-block can deliver several *times* | |
402 | * better performance. Downside is that it has to allocate | |
8483a003 | 403 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
404 | * compromise is considered worthy. |
405 | */ | |
406 | if (type == SSL3_RT_APPLICATION_DATA && | |
7ee8627f | 407 | len >= 4 * (max_send_fragment = s->max_send_fragment) && |
0f113f3e | 408 | s->compress == NULL && s->msg_callback == NULL && |
28a31a0a | 409 | !SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && |
846ec07d | 410 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
411 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
412 | unsigned char aad[13]; | |
413 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
8e6d03ca | 414 | size_t packlen; |
e3c9727f | 415 | int packleni; |
0f113f3e MC |
416 | |
417 | /* minimize address aliasing conflicts */ | |
418 | if ((max_send_fragment & 0xfff) == 0) | |
419 | max_send_fragment -= 512; | |
420 | ||
421 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
422 | ssl3_release_write_buffer(s); | |
423 | ||
424 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
425 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
8b0e934a | 426 | (int)max_send_fragment, NULL); |
0f113f3e | 427 | |
7ee8627f | 428 | if (len >= 8 * max_send_fragment) |
0f113f3e MC |
429 | packlen *= 8; |
430 | else | |
431 | packlen *= 4; | |
432 | ||
58c27c20 | 433 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
918bb865 MC |
434 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); |
435 | return -1; | |
436 | } | |
0f113f3e | 437 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
438 | /* free jumbo buffer */ |
439 | ssl3_release_write_buffer(s); | |
8b0e934a MC |
440 | *written = tot; |
441 | return 1; | |
0f113f3e MC |
442 | } |
443 | ||
444 | n = (len - tot); | |
445 | for (;;) { | |
446 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
447 | /* free jumbo buffer */ |
448 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
449 | break; |
450 | } | |
451 | ||
452 | if (s->s3->alert_dispatch) { | |
453 | i = s->method->ssl_dispatch_alert(s); | |
454 | if (i <= 0) { | |
e2228d31 | 455 | s->rlayer.wnum = tot; |
0f113f3e MC |
456 | return i; |
457 | } | |
458 | } | |
459 | ||
460 | if (n >= 8 * max_send_fragment) | |
461 | nw = max_send_fragment * (mb_param.interleave = 8); | |
462 | else | |
463 | nw = max_send_fragment * (mb_param.interleave = 4); | |
464 | ||
de07f311 | 465 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
466 | aad[8] = type; |
467 | aad[9] = (unsigned char)(s->version >> 8); | |
468 | aad[10] = (unsigned char)(s->version); | |
469 | aad[11] = 0; | |
470 | aad[12] = 0; | |
471 | mb_param.out = NULL; | |
472 | mb_param.inp = aad; | |
473 | mb_param.len = nw; | |
474 | ||
e3c9727f | 475 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, |
0f113f3e MC |
476 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, |
477 | sizeof(mb_param), &mb_param); | |
e3c9727f MC |
478 | packlen = (size_t)packleni; |
479 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
58c27c20 MC |
480 | /* free jumbo buffer */ |
481 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
482 | break; |
483 | } | |
484 | ||
485 | mb_param.out = wb->buf; | |
486 | mb_param.inp = &buf[tot]; | |
487 | mb_param.len = nw; | |
488 | ||
489 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
490 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
491 | sizeof(mb_param), &mb_param) <= 0) | |
492 | return -1; | |
493 | ||
de07f311 MC |
494 | s->rlayer.write_sequence[7] += mb_param.interleave; |
495 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 496 | int j = 6; |
de07f311 | 497 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
498 | } |
499 | ||
500 | wb->offset = 0; | |
501 | wb->left = packlen; | |
502 | ||
f8caa3c8 MC |
503 | s->rlayer.wpend_tot = nw; |
504 | s->rlayer.wpend_buf = &buf[tot]; | |
505 | s->rlayer.wpend_type = type; | |
506 | s->rlayer.wpend_ret = nw; | |
0f113f3e | 507 | |
7ee8627f | 508 | i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); |
0f113f3e | 509 | if (i <= 0) { |
1d2a18dc | 510 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
511 | /* free jumbo buffer */ |
512 | ssl3_release_write_buffer(s); | |
0f113f3e | 513 | } |
e2228d31 | 514 | s->rlayer.wnum = tot; |
0f113f3e MC |
515 | return i; |
516 | } | |
7ee8627f | 517 | if (tmpwrit == n) { |
58c27c20 MC |
518 | /* free jumbo buffer */ |
519 | ssl3_release_write_buffer(s); | |
7ee8627f MC |
520 | *written = tot + tmpwrit; |
521 | return 1; | |
0f113f3e | 522 | } |
7ee8627f MC |
523 | n -= tmpwrit; |
524 | tot += tmpwrit; | |
0f113f3e MC |
525 | } |
526 | } else | |
a9c6edcd | 527 | #endif |
0f113f3e MC |
528 | if (tot == len) { /* done? */ |
529 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
530 | ssl3_release_write_buffer(s); | |
531 | ||
7ee8627f MC |
532 | *written = tot; |
533 | return 1; | |
0f113f3e MC |
534 | } |
535 | ||
536 | n = (len - tot); | |
d102d9df MC |
537 | |
538 | split_send_fragment = s->split_send_fragment; | |
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 MC |
559 | maxpipes = 1; |
560 | if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment | |
a230b26e | 561 | || split_send_fragment == 0) { |
d102d9df MC |
562 | /* |
563 | * We should have prevented this when we set the split and max send | |
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 | ||
581 | if (n / numpipes >= s->max_send_fragment) { | |
582 | /* | |
583 | * We have enough data to completely fill all available | |
584 | * pipelines | |
585 | */ | |
586 | for (j = 0; j < numpipes; j++) { | |
587 | pipelens[j] = s->max_send_fragment; | |
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) | |
661 | return (i); | |
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) { | |
e60ce9c4 MC |
844 | /* |
845 | * TODO(TLS1.3): Make sure we prevent compression!!! | |
846 | */ | |
44e58f3b MC |
847 | if (!ssl3_do_compress(s, thiswr) |
848 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { | |
d102d9df MC |
849 | SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); |
850 | goto err; | |
851 | } | |
852 | } else { | |
44e58f3b | 853 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { |
c7c42022 MC |
854 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
855 | goto err; | |
856 | } | |
d102d9df MC |
857 | SSL3_RECORD_reset_input(&wr[j]); |
858 | } | |
0f113f3e | 859 | |
49e7fe12 | 860 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { |
96c9aee2 | 861 | size_t rlen; |
c649d10d | 862 | |
44e58f3b | 863 | if (!WPACKET_put_bytes_u8(thispkt, type)) { |
e60ce9c4 MC |
864 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
865 | goto err; | |
866 | } | |
44e58f3b | 867 | SSL3_RECORD_add_length(thiswr, 1); |
c649d10d TS |
868 | |
869 | /* Add TLS1.3 padding */ | |
96c9aee2 TS |
870 | rlen = SSL3_RECORD_get_length(thiswr); |
871 | if (rlen < SSL3_RT_MAX_PLAIN_LENGTH) { | |
872 | size_t padding = 0; | |
873 | size_t max_padding = SSL3_RT_MAX_PLAIN_LENGTH - rlen; | |
874 | if (s->record_padding_cb != NULL) { | |
875 | padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg); | |
876 | } else if (s->block_padding > 0) { | |
877 | size_t mask = s->block_padding - 1; | |
878 | size_t remainder; | |
879 | ||
880 | /* optimize for power of 2 */ | |
881 | if ((s->block_padding & mask) == 0) | |
882 | remainder = rlen & mask; | |
883 | else | |
884 | remainder = rlen % s->block_padding; | |
885 | /* don't want to add a block of padding if we don't have to */ | |
886 | if (remainder == 0) | |
887 | padding = 0; | |
888 | else | |
889 | padding = s->block_padding - remainder; | |
890 | } | |
891 | if (padding > 0) { | |
892 | /* do not allow the record to exceed max plaintext length */ | |
893 | if (padding > max_padding) | |
894 | padding = max_padding; | |
895 | if (!WPACKET_memset(thispkt, 0, padding)) { | |
896 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
897 | goto err; | |
898 | } | |
899 | SSL3_RECORD_add_length(thiswr, padding); | |
c649d10d | 900 | } |
c649d10d | 901 | } |
e60ce9c4 MC |
902 | } |
903 | ||
0f113f3e | 904 | /* |
44e58f3b MC |
905 | * we should still have the output to thiswr->data and the input from |
906 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
907 | * in the wb->buf | |
0f113f3e | 908 | */ |
0f113f3e | 909 | |
28a31a0a | 910 | if (!SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
911 | unsigned char *mac; |
912 | ||
44e58f3b MC |
913 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
914 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c7c42022 | 915 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
d102d9df | 916 | goto err; |
c7c42022 MC |
917 | } |
918 | } | |
919 | ||
920 | /* | |
921 | * Reserve some bytes for any growth that may occur during encryption. | |
922 | * This will be at most one cipher block or the tag length if using | |
923 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
924 | */ | |
44e58f3b | 925 | if(!WPACKET_reserve_bytes(thispkt, SSL_RT_MAX_CIPHER_BLOCK_SIZE, |
c7c42022 MC |
926 | NULL) |
927 | /* | |
928 | * We also need next the amount of bytes written to this | |
929 | * sub-packet | |
930 | */ | |
44e58f3b | 931 | || !WPACKET_get_length(thispkt, &len)) { |
c7c42022 MC |
932 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
933 | goto err; | |
d102d9df | 934 | } |
0f113f3e | 935 | |
c7c42022 | 936 | /* Get a pointer to the start of this record excluding header */ |
44e58f3b | 937 | recordstart = WPACKET_get_curr(thispkt) - len; |
c7c42022 | 938 | |
44e58f3b MC |
939 | SSL3_RECORD_set_data(thiswr, recordstart); |
940 | SSL3_RECORD_reset_input(thiswr); | |
941 | SSL3_RECORD_set_length(thiswr, len); | |
0f113f3e MC |
942 | } |
943 | ||
ef6c191b MC |
944 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
945 | || s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY) { | |
49e7fe12 MC |
946 | /* |
947 | * We haven't actually negotiated the version yet, but we're trying to | |
948 | * send early data - so we need to use the the tls13enc function. | |
949 | */ | |
950 | if (tls13_enc(s, wr, numpipes, 1) < 1) | |
951 | goto err; | |
952 | } else { | |
953 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) | |
954 | goto err; | |
955 | } | |
0f113f3e | 956 | |
a230b26e | 957 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
958 | size_t origlen; |
959 | ||
44e58f3b MC |
960 | thispkt = &pkt[j]; |
961 | thiswr = &wr[j]; | |
962 | ||
c7c42022 | 963 | /* Allocate bytes for the encryption overhead */ |
44e58f3b | 964 | if (!WPACKET_get_length(thispkt, &origlen) |
c7c42022 | 965 | /* Encryption should never shrink the data! */ |
44e58f3b MC |
966 | || origlen > thiswr->length |
967 | || (thiswr->length > origlen | |
968 | && !WPACKET_allocate_bytes(thispkt, | |
969 | thiswr->length - origlen, NULL))) { | |
c7c42022 MC |
970 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
971 | goto err; | |
972 | } | |
28a31a0a | 973 | if (SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
974 | unsigned char *mac; |
975 | ||
44e58f3b MC |
976 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
977 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c7c42022 | 978 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
d102d9df | 979 | goto err; |
c7c42022 | 980 | } |
44e58f3b | 981 | SSL3_RECORD_add_length(thiswr, mac_size); |
d102d9df | 982 | } |
0f113f3e | 983 | |
44e58f3b MC |
984 | if (!WPACKET_get_length(thispkt, &len) |
985 | || !WPACKET_close(thispkt)) { | |
c7c42022 MC |
986 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
987 | goto err; | |
988 | } | |
d102d9df | 989 | |
c7c42022 | 990 | if (s->msg_callback) { |
44e58f3b | 991 | recordstart = WPACKET_get_curr(thispkt) - len |
c7c42022 MC |
992 | - SSL3_RT_HEADER_LENGTH; |
993 | s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, | |
994 | SSL3_RT_HEADER_LENGTH, s, | |
d102d9df | 995 | s->msg_callback_arg); |
ad5100bc MC |
996 | |
997 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { | |
998 | unsigned char ctype = type; | |
999 | ||
1000 | s->msg_callback(1, s->version, SSL3_RT_INNER_CONTENT_TYPE, | |
1001 | &ctype, 1, s, s->msg_callback_arg); | |
1002 | } | |
c7c42022 MC |
1003 | } |
1004 | ||
44e58f3b | 1005 | if (!WPACKET_finish(thispkt)) { |
c7c42022 MC |
1006 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
1007 | goto err; | |
1008 | } | |
0f113f3e | 1009 | |
0f113f3e | 1010 | /* |
44e58f3b MC |
1011 | * we should now have thiswr->data pointing to the encrypted data, which |
1012 | * is thiswr->length long | |
0f113f3e | 1013 | */ |
44e58f3b | 1014 | SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for |
a230b26e | 1015 | * debugging */ |
44e58f3b | 1016 | SSL3_RECORD_add_length(thiswr, SSL3_RT_HEADER_LENGTH); |
d102d9df MC |
1017 | |
1018 | if (create_empty_fragment) { | |
1019 | /* | |
1020 | * we are in a recursive call; just return the length, don't write | |
1021 | * out anything here | |
1022 | */ | |
1023 | if (j > 0) { | |
1024 | /* We should never be pipelining an empty fragment!! */ | |
1025 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
1026 | goto err; | |
1027 | } | |
44e58f3b | 1028 | *written = SSL3_RECORD_get_length(thiswr); |
7ee8627f | 1029 | return 1; |
d102d9df MC |
1030 | } |
1031 | ||
1032 | /* now let's set up wb */ | |
1033 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
44e58f3b | 1034 | prefix_len + SSL3_RECORD_get_length(thiswr)); |
0f113f3e MC |
1035 | } |
1036 | ||
0f113f3e MC |
1037 | /* |
1038 | * memorize arguments so that ssl3_write_pending can detect bad write | |
1039 | * retries later | |
1040 | */ | |
d102d9df | 1041 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
1042 | s->rlayer.wpend_buf = buf; |
1043 | s->rlayer.wpend_type = type; | |
d102d9df | 1044 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
1045 | |
1046 | /* we now just need to write the buffer */ | |
7ee8627f | 1047 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e | 1048 | err: |
c7c42022 MC |
1049 | for (j = 0; j < wpinited; j++) |
1050 | WPACKET_cleanup(&pkt[j]); | |
0f113f3e MC |
1051 | return -1; |
1052 | } | |
d02b48c6 | 1053 | |
4880672a MC |
1054 | /* if s->s3->wbuf.left != 0, we need to call this |
1055 | * | |
beacb0f0 | 1056 | * Return values are as per SSL_write() |
4880672a | 1057 | */ |
7ee8627f MC |
1058 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, |
1059 | size_t *written) | |
0f113f3e MC |
1060 | { |
1061 | int i; | |
d102d9df | 1062 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
7ee8627f | 1063 | size_t currbuf = 0; |
f0ca8f89 | 1064 | size_t tmpwrit = 0; |
d02b48c6 | 1065 | |
7ee8627f | 1066 | if ((s->rlayer.wpend_tot > len) |
f8caa3c8 | 1067 | || ((s->rlayer.wpend_buf != buf) && |
0f113f3e | 1068 | !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) |
f8caa3c8 | 1069 | || (s->rlayer.wpend_type != type)) { |
0f113f3e | 1070 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
7ee8627f | 1071 | return -1; |
0f113f3e MC |
1072 | } |
1073 | ||
1074 | for (;;) { | |
d102d9df MC |
1075 | /* Loop until we find a buffer we haven't written out yet */ |
1076 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 1077 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
1078 | currbuf++; |
1079 | continue; | |
1080 | } | |
0f113f3e MC |
1081 | clear_sys_error(); |
1082 | if (s->wbio != NULL) { | |
1083 | s->rwstate = SSL_WRITING; | |
7ee8627f | 1084 | /* TODO(size_t): Convert this call */ |
a230b26e EK |
1085 | i = BIO_write(s->wbio, (char *) |
1086 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
1087 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1088 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
7ee8627f MC |
1089 | if (i >= 0) |
1090 | tmpwrit = i; | |
0f113f3e MC |
1091 | } else { |
1092 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); | |
1093 | i = -1; | |
1094 | } | |
7ee8627f | 1095 | if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { |
d102d9df | 1096 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
7ee8627f | 1097 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
d102d9df MC |
1098 | if (currbuf + 1 < s->rlayer.numwpipes) |
1099 | continue; | |
0f113f3e | 1100 | s->rwstate = SSL_NOTHING; |
7ee8627f MC |
1101 | *written = s->rlayer.wpend_ret; |
1102 | return 1; | |
0f113f3e | 1103 | } else if (i <= 0) { |
5e8b24db | 1104 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1105 | /* |
1106 | * For DTLS, just drop it. That's kind of the whole point in | |
1107 | * using a datagram service | |
1108 | */ | |
d102d9df | 1109 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 1110 | } |
beacb0f0 | 1111 | return (i); |
0f113f3e | 1112 | } |
7ee8627f MC |
1113 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
1114 | SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); | |
0f113f3e MC |
1115 | } |
1116 | } | |
d02b48c6 | 1117 | |
1d97c843 TH |
1118 | /*- |
1119 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1120 | * 'type' is one of the following: |
1121 | * | |
1122 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1123 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1124 | * - 0 (during a shutdown, no data has to be returned) | |
1125 | * | |
1126 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1127 | * (possibly multiple records if we still don't have anything to return). | |
1128 | * | |
1129 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1130 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1131 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1132 | * argument is non NULL. | |
b35e9050 BM |
1133 | * Also if record payloads contain fragments too small to process, we store |
1134 | * them until there is enough for the respective protocol (the record protocol | |
1135 | * may use arbitrary fragmentation and even interleaving): | |
1136 | * Change cipher spec protocol | |
1137 | * just 1 byte needed, no need for keeping anything stored | |
1138 | * Alert protocol | |
1139 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1140 | * Handshake protocol | |
1141 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1142 | * to detect unexpected Client Hello and Hello Request messages | |
1143 | * here, anything else is handled by higher layers | |
1144 | * Application data protocol | |
1145 | * none of our business | |
1146 | */ | |
657da85e | 1147 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
54105ddd | 1148 | size_t len, int peek, size_t *readbytes) |
0f113f3e MC |
1149 | { |
1150 | int al, i, j, ret; | |
54105ddd | 1151 | size_t n, curr_rec, num_recs, totalbytes; |
0f113f3e | 1152 | SSL3_RECORD *rr; |
94777c9c | 1153 | SSL3_BUFFER *rbuf; |
0f113f3e MC |
1154 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
1155 | ||
94777c9c MC |
1156 | rbuf = &s->rlayer.rbuf; |
1157 | ||
1158 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1159 | /* Not initialized yet */ |
0f113f3e | 1160 | if (!ssl3_setup_read_buffer(s)) |
eda75751 | 1161 | return -1; |
28d59af8 | 1162 | } |
0f113f3e MC |
1163 | |
1164 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1165 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1166 | && (type != | |
1167 | SSL3_RT_APPLICATION_DATA))) { | |
1168 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1169 | return -1; | |
1170 | } | |
1171 | ||
4aa7389e | 1172 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1173 | /* (partially) satisfy request from storage */ |
1174 | { | |
4aa7389e | 1175 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1176 | unsigned char *dst = buf; |
1177 | unsigned int k; | |
1178 | ||
1179 | /* peek == 0 */ | |
1180 | n = 0; | |
4aa7389e | 1181 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1182 | *dst++ = *src++; |
1183 | len--; | |
4aa7389e | 1184 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1185 | n++; |
1186 | } | |
1187 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1188 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1189 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1190 | |
1191 | if (recvd_type != NULL) | |
1192 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1193 | ||
54105ddd | 1194 | *readbytes = n; |
eda75751 | 1195 | return 1; |
0f113f3e MC |
1196 | } |
1197 | ||
1198 | /* | |
4aa7389e | 1199 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1200 | */ |
1201 | ||
024f543c | 1202 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1203 | /* type == SSL3_RT_APPLICATION_DATA */ |
1204 | i = s->handshake_func(s); | |
1205 | if (i < 0) | |
eda75751 | 1206 | return i; |
0f113f3e MC |
1207 | if (i == 0) { |
1208 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1209 | return -1; |
0f113f3e MC |
1210 | } |
1211 | } | |
1212 | start: | |
1213 | s->rwstate = SSL_NOTHING; | |
1214 | ||
50e735f9 | 1215 | /*- |
94777c9c MC |
1216 | * For each record 'i' up to |num_recs] |
1217 | * rr[i].type - is the type of record | |
1218 | * rr[i].data, - data | |
1219 | * rr[i].off, - offset into 'data' for next read | |
1220 | * rr[i].length, - number of bytes. | |
50e735f9 | 1221 | */ |
94777c9c MC |
1222 | rr = s->rlayer.rrec; |
1223 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1224 | ||
1225 | do { | |
1226 | /* get new records if necessary */ | |
1227 | if (num_recs == 0) { | |
1228 | ret = ssl3_get_record(s); | |
1229 | if (ret <= 0) | |
eda75751 | 1230 | return ret; |
94777c9c MC |
1231 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); |
1232 | if (num_recs == 0) { | |
1233 | /* Shouldn't happen */ | |
1234 | al = SSL_AD_INTERNAL_ERROR; | |
1235 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1236 | goto f_err; | |
1237 | } | |
1238 | } | |
255cfeac | 1239 | /* Skip over any records we have already read */ |
94777c9c | 1240 | for (curr_rec = 0; |
255cfeac | 1241 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1242 | curr_rec++) ; |
94777c9c MC |
1243 | if (curr_rec == num_recs) { |
1244 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1245 | num_recs = 0; | |
1246 | curr_rec = 0; | |
1247 | } | |
1248 | } while (num_recs == 0); | |
1249 | rr = &rr[curr_rec]; | |
0f113f3e | 1250 | |
af58be76 MC |
1251 | /* |
1252 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1253 | * record that isn't an alert. | |
1254 | */ | |
1255 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1256 | && SSL3_RECORD_get_length(rr) != 0) | |
1257 | s->rlayer.alert_count = 0; | |
1258 | ||
0f113f3e MC |
1259 | /* we now have a packet which can be read and processed */ |
1260 | ||
1261 | if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, | |
1262 | * reset by ssl3_get_finished */ | |
747e1639 | 1263 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
1264 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1265 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1266 | goto f_err; | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * If the other end has shut down, throw anything we read away (even in | |
1271 | * 'peek' mode) | |
1272 | */ | |
1273 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1274 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e | 1275 | s->rwstate = SSL_NOTHING; |
eda75751 | 1276 | return 0; |
0f113f3e MC |
1277 | } |
1278 | ||
657da85e | 1279 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e | 1280 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
97997489 MC |
1281 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL |
1282 | && !SSL_IS_TLS13(s))) { | |
657da85e MC |
1283 | /* |
1284 | * SSL3_RT_APPLICATION_DATA or | |
1285 | * SSL3_RT_HANDSHAKE or | |
1286 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1287 | */ | |
0f113f3e MC |
1288 | /* |
1289 | * make sure that we are not getting application data when we are | |
1290 | * doing a handshake for the first time | |
1291 | */ | |
1292 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1293 | (s->enc_read_ctx == NULL)) { | |
1294 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1295 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE); | |
1296 | goto f_err; | |
1297 | } | |
1298 | ||
657da85e | 1299 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1300 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1301 | && s->rlayer.handshake_fragment_len > 0) { | |
657da85e MC |
1302 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1303 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1304 | goto f_err; | |
1305 | } | |
1306 | ||
1307 | if (recvd_type != NULL) | |
1308 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1309 | ||
eda75751 MC |
1310 | if (len == 0) |
1311 | return 0; | |
0f113f3e | 1312 | |
54105ddd | 1313 | totalbytes = 0; |
94777c9c | 1314 | do { |
54105ddd | 1315 | if (len - totalbytes > SSL3_RECORD_get_length(rr)) |
94777c9c MC |
1316 | n = SSL3_RECORD_get_length(rr); |
1317 | else | |
54105ddd | 1318 | n = len - totalbytes; |
94777c9c MC |
1319 | |
1320 | memcpy(buf, &(rr->data[rr->off]), n); | |
1321 | buf += n; | |
b8d24395 MC |
1322 | if (peek) { |
1323 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1324 | if (SSL3_RECORD_get_length(rr) == 0) | |
1325 | SSL3_RECORD_set_read(rr); | |
1326 | } else { | |
753be41d | 1327 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1328 | SSL3_RECORD_add_off(rr, n); |
1329 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1330 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1331 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1332 | SSL3_RECORD_set_read(rr); |
94777c9c | 1333 | } |
0f113f3e | 1334 | } |
94777c9c MC |
1335 | if (SSL3_RECORD_get_length(rr) == 0 |
1336 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1337 | curr_rec++; | |
1338 | rr++; | |
1339 | } | |
54105ddd | 1340 | totalbytes += n; |
94777c9c | 1341 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs |
54105ddd MC |
1342 | && totalbytes < len); |
1343 | if (totalbytes == 0) { | |
255cfeac MC |
1344 | /* We must have read empty records. Get more data */ |
1345 | goto start; | |
1346 | } | |
94777c9c | 1347 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1348 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1349 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c | 1350 | ssl3_release_read_buffer(s); |
54105ddd | 1351 | *readbytes = totalbytes; |
eda75751 | 1352 | return 1; |
0f113f3e MC |
1353 | } |
1354 | ||
1355 | /* | |
1356 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1357 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1358 | * were actually expecting a CCS). | |
0f113f3e MC |
1359 | */ |
1360 | ||
32ec4153 MC |
1361 | /* |
1362 | * Lets just double check that we've not got an SSLv2 record | |
1363 | */ | |
1364 | if (rr->rec_version == SSL2_VERSION) { | |
1365 | /* | |
1366 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1367 | * record back if this is the first packet and we are looking for an | |
1368 | * initial ClientHello. Therefore |type| should always be equal to | |
1369 | * |rr->type|. If not then something has gone horribly wrong | |
1370 | */ | |
1371 | al = SSL_AD_INTERNAL_ERROR; | |
1372 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1373 | goto f_err; | |
1374 | } | |
1375 | ||
e8aa8b6c | 1376 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1377 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1378 | /* |
1379 | * If we've got this far and still haven't decided on what version | |
1380 | * we're using then this must be a client side alert we're dealing with | |
1381 | * (we don't allow heartbeats yet). We shouldn't be receiving anything | |
1382 | * other than a ClientHello if we are a server. | |
1383 | */ | |
1384 | s->version = rr->rec_version; | |
1385 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1386 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1387 | goto f_err; | |
1388 | } | |
1389 | ||
0f113f3e MC |
1390 | /* |
1391 | * In case of record types for which we have 'fragment' storage, fill | |
1392 | * that so that we can process the data at a fixed place. | |
1393 | */ | |
1394 | { | |
eda75751 | 1395 | size_t dest_maxlen = 0; |
0f113f3e | 1396 | unsigned char *dest = NULL; |
eda75751 | 1397 | size_t *dest_len = NULL; |
0f113f3e | 1398 | |
747e1639 | 1399 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
4aa7389e MC |
1400 | dest_maxlen = sizeof s->rlayer.handshake_fragment; |
1401 | dest = s->rlayer.handshake_fragment; | |
1402 | dest_len = &s->rlayer.handshake_fragment_len; | |
0f113f3e | 1403 | } |
b35e9050 | 1404 | |
0f113f3e MC |
1405 | if (dest_maxlen > 0) { |
1406 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
747e1639 MC |
1407 | if (SSL3_RECORD_get_length(rr) < n) |
1408 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
0f113f3e MC |
1409 | |
1410 | /* now move 'n' bytes: */ | |
ef6c191b MC |
1411 | memcpy(dest + *dest_len, |
1412 | SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n); | |
1413 | SSL3_RECORD_add_off(rr, n); | |
1414 | SSL3_RECORD_add_length(rr, -n); | |
1415 | *dest_len += n; | |
1416 | if (SSL3_RECORD_get_length(rr) == 0) | |
63916e9a | 1417 | SSL3_RECORD_set_read(rr); |
ef6c191b MC |
1418 | |
1419 | if (*dest_len < dest_maxlen) | |
0f113f3e MC |
1420 | goto start; /* fragment was too small */ |
1421 | } | |
1422 | } | |
1423 | ||
50e735f9 | 1424 | /*- |
4aa7389e | 1425 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
50e735f9 MC |
1426 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1427 | */ | |
0f113f3e | 1428 | |
0f113f3e MC |
1429 | /* |
1430 | * If we are a server and get a client hello when renegotiation isn't | |
1431 | * allowed send back a no renegotiation alert and carry on. WARNING: | |
1432 | * experimental code, needs reviewing (steve) | |
1433 | */ | |
1434 | if (s->server && | |
1435 | SSL_is_init_finished(s) && | |
1436 | !s->s3->send_connection_binding && | |
1437 | (s->version > SSL3_VERSION) && | |
0386aad1 | 1438 | !SSL_IS_TLS13(s) && |
4aa7389e MC |
1439 | (s->rlayer.handshake_fragment_len >= 4) && |
1440 | (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && | |
0f113f3e | 1441 | (s->session != NULL) && (s->session->cipher != NULL) && |
dffdcc77 | 1442 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { |
747e1639 | 1443 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1444 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
1445 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); |
1446 | goto start; | |
1447 | } | |
bd990e25 MC |
1448 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
1449 | unsigned int alert_level, alert_descr; | |
1450 | unsigned char *alert_bytes = SSL3_RECORD_get_data(rr) | |
1451 | + SSL3_RECORD_get_off(rr); | |
1452 | PACKET alert; | |
1453 | ||
1454 | if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr)) | |
1455 | || !PACKET_get_1(&alert, &alert_level) | |
1456 | || !PACKET_get_1(&alert, &alert_descr) | |
1457 | || PACKET_remaining(&alert) != 0) { | |
1458 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1459 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_INVALID_ALERT); | |
1460 | goto f_err; | |
1461 | } | |
0f113f3e MC |
1462 | |
1463 | if (s->msg_callback) | |
bd990e25 | 1464 | s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, |
4aa7389e | 1465 | s->msg_callback_arg); |
0f113f3e MC |
1466 | |
1467 | if (s->info_callback != NULL) | |
1468 | cb = s->info_callback; | |
1469 | else if (s->ctx->info_callback != NULL) | |
1470 | cb = s->ctx->info_callback; | |
1471 | ||
1472 | if (cb != NULL) { | |
1473 | j = (alert_level << 8) | alert_descr; | |
1474 | cb(s, SSL_CB_READ_ALERT, j); | |
1475 | } | |
1476 | ||
fd865cad | 1477 | if (alert_level == SSL3_AL_WARNING) { |
0f113f3e | 1478 | s->s3->warn_alert = alert_descr; |
63916e9a | 1479 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1480 | |
1481 | s->rlayer.alert_count++; | |
1482 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
1483 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1484 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); | |
1485 | goto f_err; | |
1486 | } | |
1487 | ||
0f113f3e MC |
1488 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { |
1489 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
eda75751 | 1490 | return 0; |
0f113f3e | 1491 | } |
f66f8a44 MC |
1492 | /* |
1493 | * Apart from close_notify the only other warning alert in TLSv1.3 | |
1494 | * is user_cancelled - which we just ignore. | |
1495 | */ | |
1496 | if (SSL_IS_TLS13(s) && alert_descr != SSL_AD_USER_CANCELLED) { | |
1497 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1498 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1499 | goto f_err; | |
1500 | } | |
0f113f3e MC |
1501 | /* |
1502 | * This is a warning but we receive it if we requested | |
1503 | * renegotiation and the peer denied it. Terminate with a fatal | |
8483a003 | 1504 | * alert because if application tried to renegotiate it |
0f113f3e MC |
1505 | * presumably had a good reason and expects it to succeed. In |
1506 | * future we might have a renegotiation where we don't care if | |
1507 | * the peer refused it where we carry on. | |
1508 | */ | |
f66f8a44 | 1509 | if (alert_descr == SSL_AD_NO_RENEGOTIATION) { |
0f113f3e MC |
1510 | al = SSL_AD_HANDSHAKE_FAILURE; |
1511 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); | |
1512 | goto f_err; | |
1513 | } | |
fd865cad | 1514 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
1515 | char tmp[16]; |
1516 | ||
1517 | s->rwstate = SSL_NOTHING; | |
1518 | s->s3->fatal_alert = alert_descr; | |
1519 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); | |
1520 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
1521 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
1522 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1523 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1524 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 1525 | return 0; |
0f113f3e MC |
1526 | } else { |
1527 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1528 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1529 | goto f_err; | |
1530 | } | |
1531 | ||
1532 | goto start; | |
1533 | } | |
1534 | ||
1535 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
1536 | * shutdown */ | |
1537 | s->rwstate = SSL_NOTHING; | |
747e1639 | 1538 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1539 | SSL3_RECORD_set_read(rr); |
eda75751 | 1540 | return 0; |
0f113f3e MC |
1541 | } |
1542 | ||
747e1639 | 1543 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
657da85e MC |
1544 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1545 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1546 | goto f_err; | |
0f113f3e MC |
1547 | } |
1548 | ||
1549 | /* | |
c7f47786 | 1550 | * Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or |
0386aad1 | 1551 | * protocol violation) |
0f113f3e | 1552 | */ |
024f543c | 1553 | if ((s->rlayer.handshake_fragment_len >= 4) |
c7f47786 | 1554 | && !ossl_statem_get_in_handshake(s)) { |
39ef7821 MC |
1555 | int ined = (s->early_data_state == SSL_EARLY_DATA_READING); |
1556 | ||
c7f47786 MC |
1557 | /* We found handshake data, so we're going back into init */ |
1558 | ossl_statem_set_in_init(s, 1); | |
1559 | ||
0f113f3e MC |
1560 | i = s->handshake_func(s); |
1561 | if (i < 0) | |
eda75751 | 1562 | return i; |
0f113f3e MC |
1563 | if (i == 0) { |
1564 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1565 | return -1; |
0f113f3e MC |
1566 | } |
1567 | ||
39ef7821 MC |
1568 | /* |
1569 | * If we were actually trying to read early data and we found a | |
1570 | * handshake message, then we don't want to continue to try and read | |
1571 | * the application data any more. It won't be "early" now. | |
1572 | */ | |
1573 | if (ined) | |
1574 | return -1; | |
1575 | ||
0f113f3e | 1576 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { |
94777c9c | 1577 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1578 | /* no read-ahead left? */ |
0f113f3e MC |
1579 | BIO *bio; |
1580 | /* | |
1581 | * In the case where we try to read application data, but we | |
1582 | * trigger an SSL handshake, we return -1 with the retry | |
1583 | * option set. Otherwise renegotiation may cause nasty | |
1584 | * problems in the blocking world | |
1585 | */ | |
1586 | s->rwstate = SSL_READING; | |
1587 | bio = SSL_get_rbio(s); | |
1588 | BIO_clear_retry_flags(bio); | |
1589 | BIO_set_retry_read(bio); | |
eda75751 | 1590 | return -1; |
0f113f3e MC |
1591 | } |
1592 | } | |
1593 | goto start; | |
1594 | } | |
1595 | ||
747e1639 | 1596 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1597 | default: |
0f113f3e | 1598 | /* |
436a2a01 MC |
1599 | * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but |
1600 | * TLS 1.2 says you MUST send an unexpected message alert. We use the | |
1601 | * TLS 1.2 behaviour for all protocol versions to prevent issues where | |
1602 | * no progress is being made and the peer continually sends unrecognised | |
1603 | * record types, using up resources processing them. | |
0f113f3e | 1604 | */ |
0f113f3e MC |
1605 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1606 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1607 | goto f_err; | |
1608 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
1609 | case SSL3_RT_ALERT: | |
1610 | case SSL3_RT_HANDSHAKE: | |
1611 | /* | |
1612 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1613 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1614 | * that should not happen when type != rr->type | |
0f113f3e MC |
1615 | */ |
1616 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1617 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1618 | goto f_err; | |
1619 | case SSL3_RT_APPLICATION_DATA: | |
1620 | /* | |
1621 | * At this point, we were expecting handshake data, but have | |
1622 | * application data. If the library was running inside ssl3_read() | |
1623 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1624 | * application data at this point (session renegotiation not yet | |
1625 | * started), we will indulge it. | |
1626 | */ | |
fe3a3291 | 1627 | if (ossl_statem_app_data_allowed(s)) { |
0f113f3e | 1628 | s->s3->in_read_app_data = 2; |
eda75751 | 1629 | return -1; |
a832b5ef MC |
1630 | } else if (ossl_statem_skip_early_data(s)) { |
1631 | /* | |
1632 | * This can happen after a client sends a CH followed by early_data, | |
1633 | * but the server responds with a HelloRetryRequest. The server | |
1634 | * reads the next record from the client expecting to find a | |
1635 | * plaintext ClientHello but gets a record which appears to be | |
1636 | * application data. The trial decrypt "works" because null | |
1637 | * decryption was applied. We just skip it and move on to the next | |
1638 | * record. | |
1639 | */ | |
1640 | if (!early_data_count_ok(s, rr->length, | |
1641 | EARLY_DATA_CIPHERTEXT_OVERHEAD, &al)) | |
1642 | goto f_err; | |
1643 | SSL3_RECORD_set_read(rr); | |
1644 | goto start; | |
0f113f3e MC |
1645 | } else { |
1646 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1647 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1648 | goto f_err; | |
1649 | } | |
1650 | } | |
1651 | /* not reached */ | |
1652 | ||
1653 | f_err: | |
1654 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
eda75751 | 1655 | return -1; |
0f113f3e | 1656 | } |
d02b48c6 | 1657 | |
14daae5a MC |
1658 | void ssl3_record_sequence_update(unsigned char *seq) |
1659 | { | |
1660 | int i; | |
1661 | ||
1662 | for (i = 7; i >= 0; i--) { | |
1663 | ++seq[i]; | |
1664 | if (seq[i] != 0) | |
1665 | break; | |
1666 | } | |
1667 | } | |
1668 | ||
d45ba43d MC |
1669 | /* |
1670 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1671 | * format and false otherwise. | |
1672 | */ | |
32ec4153 MC |
1673 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1674 | { | |
94777c9c | 1675 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1676 | } |
0f113f3e | 1677 | |
d45ba43d MC |
1678 | /* |
1679 | * Returns the length in bytes of the current rrec | |
1680 | */ | |
eda75751 | 1681 | size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1682 | { |
94777c9c | 1683 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1684 | } |