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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" |
d02b48c6 | 19 | |
78038e09 AP |
20 | #ifndef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
21 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
22 | #endif | |
23 | ||
0f113f3e MC |
24 | #if defined(OPENSSL_SMALL_FOOTPRINT) || \ |
25 | !( defined(AES_ASM) && ( \ | |
26 | defined(__x86_64) || defined(__x86_64__) || \ | |
fbaf30d0 | 27 | defined(_M_AMD64) || defined(_M_X64) ) \ |
0f113f3e | 28 | ) |
a9c6edcd AP |
29 | # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
30 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
31 | #endif | |
32 | ||
c036e210 MC |
33 | void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s) |
34 | { | |
35 | rl->s = s; | |
78fcddbb | 36 | RECORD_LAYER_set_first_record(&s->rlayer); |
94777c9c | 37 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
c036e210 MC |
38 | } |
39 | ||
af9752e5 MC |
40 | void RECORD_LAYER_clear(RECORD_LAYER *rl) |
41 | { | |
d102d9df MC |
42 | unsigned int pipes; |
43 | ||
6b41b3f5 | 44 | rl->rstate = SSL_ST_READ_HEADER; |
af9752e5 | 45 | |
a230b26e EK |
46 | /* |
47 | * Do I need to clear read_ahead? As far as I can tell read_ahead did not | |
af9752e5 MC |
48 | * previously get reset by SSL_clear...so I'll keep it that way..but is |
49 | * that right? | |
50 | */ | |
6b41b3f5 MC |
51 | |
52 | rl->packet = NULL; | |
53 | rl->packet_length = 0; | |
54 | rl->wnum = 0; | |
55 | memset(rl->alert_fragment, 0, sizeof(rl->alert_fragment)); | |
56 | rl->alert_fragment_len = 0; | |
57 | memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); | |
58 | rl->handshake_fragment_len = 0; | |
59 | rl->wpend_tot = 0; | |
60 | rl->wpend_type = 0; | |
61 | rl->wpend_ret = 0; | |
62 | rl->wpend_buf = NULL; | |
63 | ||
64 | SSL3_BUFFER_clear(&rl->rbuf); | |
e8aa8b6c | 65 | for (pipes = 0; pipes < rl->numwpipes; pipes++) |
d102d9df MC |
66 | SSL3_BUFFER_clear(&rl->wbuf[pipes]); |
67 | rl->numwpipes = 0; | |
0aac3a6b | 68 | rl->numrpipes = 0; |
94777c9c | 69 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
6b41b3f5 | 70 | |
95cdad63 MC |
71 | RECORD_LAYER_reset_read_sequence(rl); |
72 | RECORD_LAYER_reset_write_sequence(rl); | |
0485d540 | 73 | |
6b41b3f5 | 74 | if (rl->d) |
5fb6f80c | 75 | DTLS_RECORD_LAYER_clear(rl); |
af9752e5 MC |
76 | } |
77 | ||
f161995e MC |
78 | void RECORD_LAYER_release(RECORD_LAYER *rl) |
79 | { | |
80 | if (SSL3_BUFFER_is_initialised(&rl->rbuf)) | |
81 | ssl3_release_read_buffer(rl->s); | |
d102d9df | 82 | if (rl->numwpipes > 0) |
f161995e | 83 | ssl3_release_write_buffer(rl->s); |
94777c9c | 84 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
f161995e MC |
85 | } |
86 | ||
49580f25 | 87 | int RECORD_LAYER_read_pending(const RECORD_LAYER *rl) |
f161995e MC |
88 | { |
89 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; | |
90 | } | |
91 | ||
49580f25 | 92 | int RECORD_LAYER_write_pending(const RECORD_LAYER *rl) |
f161995e | 93 | { |
d102d9df | 94 | return (rl->numwpipes > 0) |
a230b26e | 95 | && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0; |
f161995e MC |
96 | } |
97 | ||
eda75751 MC |
98 | int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, |
99 | size_t len) | |
bbcd6d7f | 100 | { |
7a7048af | 101 | rl->packet_length = len; |
61986d32 | 102 | if (len != 0) { |
295c3f41 | 103 | rl->rstate = SSL_ST_READ_HEADER; |
bbcd6d7f MC |
104 | if (!SSL3_BUFFER_is_initialised(&rl->rbuf)) |
105 | if (!ssl3_setup_read_buffer(rl->s)) | |
106 | return 0; | |
107 | } | |
108 | ||
7a7048af | 109 | rl->packet = SSL3_BUFFER_get_buf(&rl->rbuf); |
bbcd6d7f MC |
110 | SSL3_BUFFER_set_data(&rl->rbuf, buf, len); |
111 | ||
112 | return 1; | |
113 | } | |
114 | ||
de07f311 MC |
115 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
116 | { | |
95cdad63 | 117 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
118 | } |
119 | ||
120 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
121 | { | |
95cdad63 | 122 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
123 | } |
124 | ||
8b0e934a | 125 | size_t ssl3_pending(const SSL *s) |
d5a25ae0 | 126 | { |
8b0e934a | 127 | size_t i, num = 0; |
94777c9c | 128 | |
295c3f41 | 129 | if (s->rlayer.rstate == SSL_ST_READ_BODY) |
d5a25ae0 MC |
130 | return 0; |
131 | ||
94777c9c MC |
132 | for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { |
133 | if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) | |
a230b26e | 134 | != SSL3_RT_APPLICATION_DATA) |
94777c9c MC |
135 | return 0; |
136 | num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); | |
137 | } | |
138 | ||
139 | return num; | |
d5a25ae0 MC |
140 | } |
141 | ||
dad78fb1 MC |
142 | void SSL_CTX_set_default_read_buffer_len(SSL_CTX *ctx, size_t len) |
143 | { | |
144 | ctx->default_read_buf_len = len; | |
145 | } | |
146 | ||
147 | void SSL_set_default_read_buffer_len(SSL *s, size_t len) | |
148 | { | |
149 | SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s->rlayer), len); | |
150 | } | |
151 | ||
295c3f41 MC |
152 | const char *SSL_rstate_string_long(const SSL *s) |
153 | { | |
295c3f41 MC |
154 | switch (s->rlayer.rstate) { |
155 | case SSL_ST_READ_HEADER: | |
475965f2 | 156 | return "read header"; |
295c3f41 | 157 | case SSL_ST_READ_BODY: |
475965f2 | 158 | return "read body"; |
295c3f41 | 159 | case SSL_ST_READ_DONE: |
475965f2 | 160 | return "read done"; |
295c3f41 | 161 | default: |
475965f2 | 162 | return "unknown"; |
295c3f41 | 163 | } |
295c3f41 MC |
164 | } |
165 | ||
166 | const char *SSL_rstate_string(const SSL *s) | |
167 | { | |
295c3f41 MC |
168 | switch (s->rlayer.rstate) { |
169 | case SSL_ST_READ_HEADER: | |
475965f2 | 170 | return "RH"; |
295c3f41 | 171 | case SSL_ST_READ_BODY: |
475965f2 | 172 | return "RB"; |
295c3f41 | 173 | case SSL_ST_READ_DONE: |
475965f2 | 174 | return "RD"; |
295c3f41 | 175 | default: |
475965f2 | 176 | return "unknown"; |
295c3f41 | 177 | } |
295c3f41 MC |
178 | } |
179 | ||
4880672a | 180 | /* |
beacb0f0 | 181 | * Return values are as per SSL_read() |
4880672a | 182 | */ |
8e6d03ca | 183 | int ssl3_read_n(SSL *s, size_t n, size_t max, int extend, int clearold, |
54105ddd | 184 | size_t *readbytes) |
0f113f3e MC |
185 | { |
186 | /* | |
187 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
188 | * packet by another n bytes. The packet will be in the sub-array of | |
189 | * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If | |
52e1d7b1 | 190 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 191 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
192 | * if clearold == 1, move the packet to the start of the buffer; if |
193 | * clearold == 0 then leave any old packets where they were | |
0f113f3e | 194 | */ |
8e6d03ca | 195 | size_t len, left, align = 0; |
0f113f3e MC |
196 | unsigned char *pkt; |
197 | SSL3_BUFFER *rb; | |
198 | ||
8e6d03ca MC |
199 | if (n == 0) |
200 | return 0; | |
0f113f3e | 201 | |
88c23039 | 202 | rb = &s->rlayer.rbuf; |
0f113f3e MC |
203 | if (rb->buf == NULL) |
204 | if (!ssl3_setup_read_buffer(s)) | |
205 | return -1; | |
206 | ||
207 | left = rb->left; | |
a4d64c7f | 208 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 | 209 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
753be41d | 210 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 211 | #endif |
d02b48c6 | 212 | |
0f113f3e MC |
213 | if (!extend) { |
214 | /* start with empty packet ... */ | |
215 | if (left == 0) | |
216 | rb->offset = align; | |
217 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
218 | /* | |
219 | * check if next packet length is large enough to justify payload | |
220 | * alignment... | |
221 | */ | |
222 | pkt = rb->buf + rb->offset; | |
223 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
224 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
225 | /* | |
226 | * Note that even if packet is corrupted and its length field | |
227 | * is insane, we can only be led to wrong decision about | |
228 | * whether memmove will occur or not. Header values has no | |
229 | * effect on memmove arguments and therefore no buffer | |
230 | * overrun can be triggered. | |
231 | */ | |
232 | memmove(rb->buf + align, pkt, left); | |
233 | rb->offset = align; | |
234 | } | |
235 | } | |
7a7048af MC |
236 | s->rlayer.packet = rb->buf + rb->offset; |
237 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
238 | /* ... now we can act as if 'extend' was set */ |
239 | } | |
240 | ||
a7faa6da MC |
241 | len = s->rlayer.packet_length; |
242 | pkt = rb->buf + align; | |
243 | /* | |
244 | * Move any available bytes to front of buffer: 'len' bytes already | |
245 | * pointed to by 'packet', 'left' extra ones at the end | |
246 | */ | |
247 | if (s->rlayer.packet != pkt && clearold == 1) { | |
248 | memmove(pkt, s->rlayer.packet, len + left); | |
249 | s->rlayer.packet = pkt; | |
250 | rb->offset = len + align; | |
251 | } | |
252 | ||
0f113f3e MC |
253 | /* |
254 | * For DTLS/UDP reads should not span multiple packets because the read | |
255 | * operation returns the whole packet at once (as long as it fits into | |
256 | * the buffer). | |
257 | */ | |
258 | if (SSL_IS_DTLS(s)) { | |
259 | if (left == 0 && extend) | |
260 | return 0; | |
261 | if (left > 0 && n > left) | |
262 | n = left; | |
263 | } | |
264 | ||
265 | /* if there is enough in the buffer from a previous read, take some */ | |
266 | if (left >= n) { | |
7a7048af | 267 | s->rlayer.packet_length += n; |
0f113f3e MC |
268 | rb->left = left - n; |
269 | rb->offset += n; | |
54105ddd | 270 | *readbytes = n; |
8e6d03ca | 271 | return 1; |
0f113f3e MC |
272 | } |
273 | ||
274 | /* else we need to read more data */ | |
275 | ||
ff04799d | 276 | if (n > rb->len - rb->offset) { /* does not happen */ |
0f113f3e MC |
277 | SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); |
278 | return -1; | |
279 | } | |
280 | ||
8dd4ad0f | 281 | /* We always act like read_ahead is set for DTLS */ |
4118dfdc | 282 | if (!s->rlayer.read_ahead && !SSL_IS_DTLS(s)) |
0f113f3e MC |
283 | /* ignore max parameter */ |
284 | max = n; | |
285 | else { | |
286 | if (max < n) | |
287 | max = n; | |
ff04799d | 288 | if (max > rb->len - rb->offset) |
0f113f3e MC |
289 | max = rb->len - rb->offset; |
290 | } | |
291 | ||
292 | while (left < n) { | |
f0ca8f89 | 293 | size_t bioread = 0; |
8e6d03ca MC |
294 | int ret; |
295 | ||
0f113f3e MC |
296 | /* |
297 | * Now we have len+left bytes at the front of s->s3->rbuf.buf and | |
298 | * need to read in more until we have len+n (up to len+max if | |
299 | * possible) | |
300 | */ | |
301 | ||
302 | clear_sys_error(); | |
303 | if (s->rbio != NULL) { | |
304 | s->rwstate = SSL_READING; | |
8e6d03ca MC |
305 | /* TODO(size_t): Convert this function */ |
306 | ret = BIO_read(s->rbio, pkt + len + left, max - left); | |
307 | if (ret >= 0) | |
308 | bioread = ret; | |
0f113f3e MC |
309 | } else { |
310 | SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); | |
8e6d03ca | 311 | ret = -1; |
0f113f3e MC |
312 | } |
313 | ||
8e6d03ca | 314 | if (ret <= 0) { |
0f113f3e MC |
315 | rb->left = left; |
316 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
317 | if (len + left == 0) | |
318 | ssl3_release_read_buffer(s); | |
beacb0f0 | 319 | return ret; |
0f113f3e | 320 | } |
8e6d03ca | 321 | left += bioread; |
0f113f3e MC |
322 | /* |
323 | * reads should *never* span multiple packets for DTLS because the | |
324 | * underlying transport protocol is message oriented as opposed to | |
325 | * byte oriented as in the TLS case. | |
326 | */ | |
327 | if (SSL_IS_DTLS(s)) { | |
328 | if (n > left) | |
329 | n = left; /* makes the while condition false */ | |
330 | } | |
331 | } | |
332 | ||
333 | /* done reading, now the book-keeping */ | |
334 | rb->offset += n; | |
335 | rb->left = left - n; | |
7a7048af | 336 | s->rlayer.packet_length += n; |
0f113f3e | 337 | s->rwstate = SSL_NOTHING; |
54105ddd | 338 | *readbytes = n; |
8e6d03ca | 339 | return 1; |
0f113f3e MC |
340 | } |
341 | ||
0f113f3e MC |
342 | /* |
343 | * Call this to write data in records of type 'type' It will return <= 0 if | |
344 | * not all data has been sent or non-blocking IO. | |
d02b48c6 | 345 | */ |
7ee8627f MC |
346 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len, |
347 | size_t *written) | |
0f113f3e MC |
348 | { |
349 | const unsigned char *buf = buf_; | |
7ee8627f MC |
350 | size_t tot; |
351 | size_t n, split_send_fragment, maxpipes; | |
f1f7598c | 352 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
7ee8627f | 353 | size_t max_send_fragment, nw; |
f1f7598c | 354 | #endif |
d102d9df | 355 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 356 | int i; |
7ee8627f | 357 | size_t tmpwrit; |
0f113f3e MC |
358 | |
359 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 360 | tot = s->rlayer.wnum; |
0f113f3e MC |
361 | /* |
362 | * ensure that if we end up with a smaller value of data to write out | |
363 | * than the the original len from a write which didn't complete for | |
364 | * non-blocking I/O and also somehow ended up avoiding the check for | |
365 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
366 | * possible to end up with (len-tot) as a large number that will then | |
367 | * promptly send beyond the end of the users buffer ... so we trap and | |
368 | * report the error in a way the user will notice | |
369 | */ | |
7ee8627f | 370 | if (len < s->rlayer.wnum) { |
0f113f3e | 371 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); |
1c2e5d56 MC |
372 | return -1; |
373 | } | |
374 | ||
1c2e5d56 MC |
375 | s->rlayer.wnum = 0; |
376 | ||
377 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) { | |
378 | i = s->handshake_func(s); | |
379 | if (i < 0) | |
7ee8627f | 380 | return i; |
1c2e5d56 MC |
381 | if (i == 0) { |
382 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
383 | return -1; | |
384 | } | |
0f113f3e MC |
385 | } |
386 | ||
387 | /* | |
388 | * first check if there is a SSL3_BUFFER still being written out. This | |
389 | * will happen with non blocking IO | |
390 | */ | |
391 | if (wb->left != 0) { | |
7ee8627f MC |
392 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, |
393 | &tmpwrit); | |
0f113f3e MC |
394 | if (i <= 0) { |
395 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 396 | s->rlayer.wnum = tot; |
0f113f3e MC |
397 | return i; |
398 | } | |
7ee8627f | 399 | tot += tmpwrit; /* this might be last fragment */ |
0f113f3e | 400 | } |
a9c6edcd | 401 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
402 | /* |
403 | * Depending on platform multi-block can deliver several *times* | |
404 | * better performance. Downside is that it has to allocate | |
8483a003 | 405 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
406 | * compromise is considered worthy. |
407 | */ | |
408 | if (type == SSL3_RT_APPLICATION_DATA && | |
7ee8627f | 409 | len >= 4 * (max_send_fragment = s->max_send_fragment) && |
0f113f3e MC |
410 | s->compress == NULL && s->msg_callback == NULL && |
411 | !SSL_USE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && | |
846ec07d | 412 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
413 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
414 | unsigned char aad[13]; | |
415 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
8e6d03ca | 416 | size_t packlen; |
e3c9727f | 417 | int packleni; |
0f113f3e MC |
418 | |
419 | /* minimize address aliasing conflicts */ | |
420 | if ((max_send_fragment & 0xfff) == 0) | |
421 | max_send_fragment -= 512; | |
422 | ||
423 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
424 | ssl3_release_write_buffer(s); | |
425 | ||
426 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
427 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
8b0e934a | 428 | (int)max_send_fragment, NULL); |
0f113f3e | 429 | |
7ee8627f | 430 | if (len >= 8 * max_send_fragment) |
0f113f3e MC |
431 | packlen *= 8; |
432 | else | |
433 | packlen *= 4; | |
434 | ||
58c27c20 | 435 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
918bb865 MC |
436 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); |
437 | return -1; | |
438 | } | |
0f113f3e | 439 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
440 | /* free jumbo buffer */ |
441 | ssl3_release_write_buffer(s); | |
8b0e934a MC |
442 | *written = tot; |
443 | return 1; | |
0f113f3e MC |
444 | } |
445 | ||
446 | n = (len - tot); | |
447 | for (;;) { | |
448 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
449 | /* free jumbo buffer */ |
450 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
451 | break; |
452 | } | |
453 | ||
454 | if (s->s3->alert_dispatch) { | |
455 | i = s->method->ssl_dispatch_alert(s); | |
456 | if (i <= 0) { | |
e2228d31 | 457 | s->rlayer.wnum = tot; |
0f113f3e MC |
458 | return i; |
459 | } | |
460 | } | |
461 | ||
462 | if (n >= 8 * max_send_fragment) | |
463 | nw = max_send_fragment * (mb_param.interleave = 8); | |
464 | else | |
465 | nw = max_send_fragment * (mb_param.interleave = 4); | |
466 | ||
de07f311 | 467 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
468 | aad[8] = type; |
469 | aad[9] = (unsigned char)(s->version >> 8); | |
470 | aad[10] = (unsigned char)(s->version); | |
471 | aad[11] = 0; | |
472 | aad[12] = 0; | |
473 | mb_param.out = NULL; | |
474 | mb_param.inp = aad; | |
475 | mb_param.len = nw; | |
476 | ||
e3c9727f | 477 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, |
0f113f3e MC |
478 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, |
479 | sizeof(mb_param), &mb_param); | |
e3c9727f MC |
480 | packlen = (size_t)packleni; |
481 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
58c27c20 MC |
482 | /* free jumbo buffer */ |
483 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
484 | break; |
485 | } | |
486 | ||
487 | mb_param.out = wb->buf; | |
488 | mb_param.inp = &buf[tot]; | |
489 | mb_param.len = nw; | |
490 | ||
491 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
492 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
493 | sizeof(mb_param), &mb_param) <= 0) | |
494 | return -1; | |
495 | ||
de07f311 MC |
496 | s->rlayer.write_sequence[7] += mb_param.interleave; |
497 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 498 | int j = 6; |
de07f311 | 499 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
500 | } |
501 | ||
502 | wb->offset = 0; | |
503 | wb->left = packlen; | |
504 | ||
f8caa3c8 MC |
505 | s->rlayer.wpend_tot = nw; |
506 | s->rlayer.wpend_buf = &buf[tot]; | |
507 | s->rlayer.wpend_type = type; | |
508 | s->rlayer.wpend_ret = nw; | |
0f113f3e | 509 | |
7ee8627f | 510 | i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); |
0f113f3e | 511 | if (i <= 0) { |
1d2a18dc | 512 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
513 | /* free jumbo buffer */ |
514 | ssl3_release_write_buffer(s); | |
0f113f3e | 515 | } |
e2228d31 | 516 | s->rlayer.wnum = tot; |
0f113f3e MC |
517 | return i; |
518 | } | |
7ee8627f | 519 | if (tmpwrit == n) { |
58c27c20 MC |
520 | /* free jumbo buffer */ |
521 | ssl3_release_write_buffer(s); | |
7ee8627f MC |
522 | *written = tot + tmpwrit; |
523 | return 1; | |
0f113f3e | 524 | } |
7ee8627f MC |
525 | n -= tmpwrit; |
526 | tot += tmpwrit; | |
0f113f3e MC |
527 | } |
528 | } else | |
a9c6edcd | 529 | #endif |
0f113f3e MC |
530 | if (tot == len) { /* done? */ |
531 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
532 | ssl3_release_write_buffer(s); | |
533 | ||
7ee8627f MC |
534 | *written = tot; |
535 | return 1; | |
0f113f3e MC |
536 | } |
537 | ||
538 | n = (len - tot); | |
d102d9df MC |
539 | |
540 | split_send_fragment = s->split_send_fragment; | |
541 | /* | |
542 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 543 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
544 | * processing then we also only use 1 pipeline, or if we're not using |
545 | * explicit IVs | |
546 | */ | |
547 | maxpipes = s->max_pipelines; | |
548 | if (maxpipes > SSL_MAX_PIPELINES) { | |
549 | /* | |
550 | * We should have prevented this when we set max_pipelines so we | |
551 | * shouldn't get here | |
a230b26e | 552 | */ |
d102d9df MC |
553 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
554 | return -1; | |
555 | } | |
556 | if (maxpipes == 0 | |
a230b26e EK |
557 | || s->enc_write_ctx == NULL |
558 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
559 | & EVP_CIPH_FLAG_PIPELINE) | |
560 | || !SSL_USE_EXPLICIT_IV(s)) | |
d102d9df MC |
561 | maxpipes = 1; |
562 | if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment | |
a230b26e | 563 | || split_send_fragment == 0) { |
d102d9df MC |
564 | /* |
565 | * We should have prevented this when we set the split and max send | |
566 | * fragments so we shouldn't get here | |
a230b26e | 567 | */ |
d102d9df MC |
568 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
569 | return -1; | |
570 | } | |
571 | ||
0f113f3e | 572 | for (;;) { |
7ee8627f MC |
573 | size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
574 | size_t numpipes, j; | |
d102d9df MC |
575 | |
576 | if (n == 0) | |
577 | numpipes = 1; | |
0f113f3e | 578 | else |
d102d9df MC |
579 | numpipes = ((n - 1) / split_send_fragment) + 1; |
580 | if (numpipes > maxpipes) | |
581 | numpipes = maxpipes; | |
582 | ||
583 | if (n / numpipes >= s->max_send_fragment) { | |
584 | /* | |
585 | * We have enough data to completely fill all available | |
586 | * pipelines | |
587 | */ | |
588 | for (j = 0; j < numpipes; j++) { | |
589 | pipelens[j] = s->max_send_fragment; | |
590 | } | |
591 | } else { | |
592 | /* We can partially fill all available pipelines */ | |
593 | tmppipelen = n / numpipes; | |
594 | remain = n % numpipes; | |
595 | for (j = 0; j < numpipes; j++) { | |
596 | pipelens[j] = tmppipelen; | |
597 | if (j < remain) | |
598 | pipelens[j]++; | |
599 | } | |
600 | } | |
0f113f3e | 601 | |
7ee8627f MC |
602 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0, |
603 | &tmpwrit); | |
0f113f3e MC |
604 | if (i <= 0) { |
605 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 606 | s->rlayer.wnum = tot; |
0f113f3e MC |
607 | return i; |
608 | } | |
609 | ||
ff04799d | 610 | if (tmpwrit == n || |
0f113f3e MC |
611 | (type == SSL3_RT_APPLICATION_DATA && |
612 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
613 | /* | |
614 | * next chunk of data should get another prepended empty fragment | |
615 | * in ciphersuites with known-IV weakness: | |
616 | */ | |
617 | s->s3->empty_fragment_done = 0; | |
618 | ||
619 | if ((i == (int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && | |
620 | !SSL_IS_DTLS(s)) | |
621 | ssl3_release_write_buffer(s); | |
622 | ||
7ee8627f MC |
623 | *written = tot + tmpwrit; |
624 | return 1; | |
0f113f3e MC |
625 | } |
626 | ||
7ee8627f MC |
627 | n -= tmpwrit; |
628 | tot += tmpwrit; | |
0f113f3e MC |
629 | } |
630 | } | |
d02b48c6 | 631 | |
c103c7e2 | 632 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
7ee8627f MC |
633 | size_t *pipelens, size_t numpipes, |
634 | int create_empty_fragment, size_t *written) | |
0f113f3e | 635 | { |
c7c42022 | 636 | WPACKET pkt[SSL_MAX_PIPELINES]; |
d102d9df | 637 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; |
c7c42022 | 638 | unsigned char *recordstart; |
0f113f3e | 639 | int i, mac_size, clear = 0; |
7ee8627f | 640 | size_t prefix_len = 0; |
0f113f3e | 641 | int eivlen; |
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]; |
c7c42022 MC |
740 | if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), |
741 | SSL3_BUFFER_get_len(wb), 0) | |
742 | || !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb) | |
743 | + prefix_len, NULL)) { | |
744 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
745 | goto err; | |
746 | } | |
747 | wpinited = 1; | |
0f113f3e | 748 | } else { |
a230b26e | 749 | for (j = 0; j < numpipes; j++) { |
d102d9df | 750 | wb = &s->rlayer.wbuf[j]; |
a4d64c7f | 751 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
d102d9df | 752 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
753be41d | 753 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 754 | #endif |
d102d9df | 755 | SSL3_BUFFER_set_offset(wb, align); |
c7c42022 MC |
756 | if (!WPACKET_init_static_len(&pkt[j], SSL3_BUFFER_get_buf(wb), |
757 | SSL3_BUFFER_get_len(wb), 0) | |
758 | || !WPACKET_allocate_bytes(&pkt[j], align, NULL)) { | |
759 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
760 | goto err; | |
761 | } | |
762 | wpinited++; | |
d102d9df | 763 | } |
0f113f3e MC |
764 | } |
765 | ||
0f113f3e MC |
766 | /* Explicit IV length, block ciphers appropriate version flag */ |
767 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s)) { | |
768 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); | |
769 | if (mode == EVP_CIPH_CBC_MODE) { | |
7ee8627f | 770 | /* TODO(size_t): Convert me */ |
0f113f3e MC |
771 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); |
772 | if (eivlen <= 1) | |
773 | eivlen = 0; | |
c7c42022 MC |
774 | } else if (mode == EVP_CIPH_GCM_MODE) { |
775 | /* Need explicit part of IV for GCM mode */ | |
0f113f3e | 776 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 777 | } else if (mode == EVP_CIPH_CCM_MODE) { |
e75c5a79 | 778 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 779 | } else { |
0f113f3e | 780 | eivlen = 0; |
c7c42022 MC |
781 | } |
782 | } else { | |
0f113f3e | 783 | eivlen = 0; |
c7c42022 | 784 | } |
0f113f3e | 785 | |
d102d9df MC |
786 | totlen = 0; |
787 | /* Clear our SSL3_RECORD structures */ | |
788 | memset(wr, 0, sizeof wr); | |
a230b26e | 789 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
790 | unsigned int version = s->version; |
791 | unsigned char *compressdata; | |
792 | size_t maxcomplen; | |
0f113f3e | 793 | |
c7c42022 | 794 | SSL3_RECORD_set_type(&wr[j], type); |
d102d9df | 795 | /* |
8483a003 | 796 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
797 | * and record version number > TLS 1.0 |
798 | */ | |
799 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
800 | && !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION) | |
c7c42022 | 801 | version = TLS1_VERSION; |
0f113f3e | 802 | |
c7c42022 MC |
803 | maxcomplen = pipelens[j] + (ssl_allow_compression(s) |
804 | ? SSL3_RT_MAX_COMPRESSED_OVERHEAD : 0); | |
805 | /* write the header */ | |
806 | if (!WPACKET_put_bytes_u8(&pkt[j], type) | |
807 | || !WPACKET_put_bytes_u16(&pkt[j], version) | |
808 | || !WPACKET_start_sub_packet_u16(&pkt[j]) | |
809 | || (eivlen > 0 | |
810 | && !WPACKET_allocate_bytes(&pkt[j], eivlen, NULL)) | |
811 | || (maxcomplen > 0 | |
812 | && !WPACKET_reserve_bytes(&pkt[j], maxcomplen, | |
813 | &compressdata))) { | |
814 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
815 | goto err; | |
816 | } | |
0f113f3e | 817 | |
d102d9df | 818 | /* lets setup the record stuff. */ |
c7c42022 | 819 | SSL3_RECORD_set_data(&wr[j], compressdata); |
eda75751 | 820 | SSL3_RECORD_set_length(&wr[j], pipelens[j]); |
d102d9df MC |
821 | SSL3_RECORD_set_input(&wr[j], (unsigned char *)&buf[totlen]); |
822 | totlen += pipelens[j]; | |
0f113f3e | 823 | |
d102d9df MC |
824 | /* |
825 | * we now 'read' from wr->input, wr->length bytes into wr->data | |
826 | */ | |
0f113f3e | 827 | |
d102d9df MC |
828 | /* first we compress */ |
829 | if (s->compress != NULL) { | |
c7c42022 MC |
830 | if (!ssl3_do_compress(s, &wr[j]) |
831 | || !WPACKET_allocate_bytes(&pkt[j], wr[j].length, NULL)) { | |
d102d9df MC |
832 | SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); |
833 | goto err; | |
834 | } | |
835 | } else { | |
c7c42022 MC |
836 | if (!WPACKET_memcpy(&pkt[j], wr[j].input, wr[j].length)) { |
837 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
838 | goto err; | |
839 | } | |
d102d9df MC |
840 | SSL3_RECORD_reset_input(&wr[j]); |
841 | } | |
0f113f3e | 842 | |
0f113f3e | 843 | /* |
d102d9df MC |
844 | * we should still have the output to wr->data and the input from |
845 | * wr->input. Length should be wr->length. wr->data still points in the | |
846 | * wb->buf | |
0f113f3e | 847 | */ |
0f113f3e | 848 | |
d102d9df | 849 | if (!SSL_USE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
850 | unsigned char *mac; |
851 | ||
852 | if (!WPACKET_allocate_bytes(&pkt[j], mac_size, &mac) | |
853 | || !s->method->ssl3_enc->mac(s, &wr[j], mac, 1)) { | |
854 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
d102d9df | 855 | goto err; |
c7c42022 MC |
856 | } |
857 | } | |
858 | ||
859 | /* | |
860 | * Reserve some bytes for any growth that may occur during encryption. | |
861 | * This will be at most one cipher block or the tag length if using | |
862 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
863 | */ | |
864 | if(!WPACKET_reserve_bytes(&pkt[j], SSL_RT_MAX_CIPHER_BLOCK_SIZE, | |
865 | NULL) | |
866 | /* | |
867 | * We also need next the amount of bytes written to this | |
868 | * sub-packet | |
869 | */ | |
870 | || !WPACKET_get_length(&pkt[j], &len)) { | |
871 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
872 | goto err; | |
d102d9df | 873 | } |
0f113f3e | 874 | |
c7c42022 MC |
875 | /* Get a pointer to the start of this record excluding header */ |
876 | recordstart = WPACKET_get_curr(&pkt[j]) - len; | |
877 | ||
878 | SSL3_RECORD_set_data(&wr[j], recordstart); | |
d102d9df | 879 | SSL3_RECORD_reset_input(&wr[j]); |
c7c42022 | 880 | SSL3_RECORD_set_length(&wr[j], len); |
d102d9df | 881 | |
0f113f3e MC |
882 | } |
883 | ||
d102d9df MC |
884 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) |
885 | goto err; | |
0f113f3e | 886 | |
a230b26e | 887 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
888 | size_t origlen; |
889 | ||
890 | /* Allocate bytes for the encryption overhead */ | |
891 | if (!WPACKET_get_length(&pkt[j], &origlen) | |
892 | /* Encryption should never shrink the data! */ | |
893 | || origlen > wr[j].length | |
894 | || (wr[j].length > origlen | |
895 | && !WPACKET_allocate_bytes(&pkt[j], | |
896 | wr[j].length - origlen, NULL))) { | |
897 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
898 | goto err; | |
899 | } | |
d102d9df | 900 | if (SSL_USE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
901 | unsigned char *mac; |
902 | ||
903 | if (!WPACKET_allocate_bytes(&pkt[j], mac_size, &mac) | |
904 | || !s->method->ssl3_enc->mac(s, &wr[j], mac, 1)) { | |
905 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
d102d9df | 906 | goto err; |
c7c42022 | 907 | } |
d102d9df MC |
908 | SSL3_RECORD_add_length(&wr[j], mac_size); |
909 | } | |
0f113f3e | 910 | |
c7c42022 MC |
911 | if (!WPACKET_get_length(&pkt[j], &len) |
912 | || !WPACKET_close(&pkt[j])) { | |
913 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
914 | goto err; | |
915 | } | |
d102d9df | 916 | |
c7c42022 MC |
917 | if (s->msg_callback) { |
918 | recordstart = WPACKET_get_curr(&pkt[j]) - len | |
919 | - SSL3_RT_HEADER_LENGTH; | |
920 | s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, | |
921 | SSL3_RT_HEADER_LENGTH, s, | |
d102d9df | 922 | s->msg_callback_arg); |
c7c42022 MC |
923 | } |
924 | ||
925 | if (!WPACKET_finish(&pkt[j])) { | |
926 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
927 | goto err; | |
928 | } | |
0f113f3e | 929 | |
0f113f3e | 930 | /* |
d102d9df MC |
931 | * we should now have wr->data pointing to the encrypted data, which is |
932 | * wr->length long | |
0f113f3e | 933 | */ |
a230b26e EK |
934 | SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for |
935 | * debugging */ | |
d102d9df MC |
936 | SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); |
937 | ||
938 | if (create_empty_fragment) { | |
939 | /* | |
940 | * we are in a recursive call; just return the length, don't write | |
941 | * out anything here | |
942 | */ | |
943 | if (j > 0) { | |
944 | /* We should never be pipelining an empty fragment!! */ | |
945 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
946 | goto err; | |
947 | } | |
7ee8627f MC |
948 | *written = SSL3_RECORD_get_length(wr); |
949 | return 1; | |
d102d9df MC |
950 | } |
951 | ||
952 | /* now let's set up wb */ | |
953 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
a230b26e | 954 | prefix_len + SSL3_RECORD_get_length(&wr[j])); |
0f113f3e MC |
955 | } |
956 | ||
0f113f3e MC |
957 | /* |
958 | * memorize arguments so that ssl3_write_pending can detect bad write | |
959 | * retries later | |
960 | */ | |
d102d9df | 961 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
962 | s->rlayer.wpend_buf = buf; |
963 | s->rlayer.wpend_type = type; | |
d102d9df | 964 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
965 | |
966 | /* we now just need to write the buffer */ | |
7ee8627f | 967 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e | 968 | err: |
c7c42022 MC |
969 | for (j = 0; j < wpinited; j++) |
970 | WPACKET_cleanup(&pkt[j]); | |
0f113f3e MC |
971 | return -1; |
972 | } | |
d02b48c6 | 973 | |
4880672a MC |
974 | /* if s->s3->wbuf.left != 0, we need to call this |
975 | * | |
beacb0f0 | 976 | * Return values are as per SSL_write() |
4880672a | 977 | */ |
7ee8627f MC |
978 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, |
979 | size_t *written) | |
0f113f3e MC |
980 | { |
981 | int i; | |
d102d9df | 982 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
7ee8627f | 983 | size_t currbuf = 0; |
f0ca8f89 | 984 | size_t tmpwrit = 0; |
d02b48c6 | 985 | |
7ee8627f | 986 | if ((s->rlayer.wpend_tot > len) |
f8caa3c8 | 987 | || ((s->rlayer.wpend_buf != buf) && |
0f113f3e | 988 | !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) |
f8caa3c8 | 989 | || (s->rlayer.wpend_type != type)) { |
0f113f3e | 990 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
7ee8627f | 991 | return -1; |
0f113f3e MC |
992 | } |
993 | ||
994 | for (;;) { | |
d102d9df MC |
995 | /* Loop until we find a buffer we haven't written out yet */ |
996 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 997 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
998 | currbuf++; |
999 | continue; | |
1000 | } | |
0f113f3e MC |
1001 | clear_sys_error(); |
1002 | if (s->wbio != NULL) { | |
1003 | s->rwstate = SSL_WRITING; | |
7ee8627f | 1004 | /* TODO(size_t): Convert this call */ |
a230b26e EK |
1005 | i = BIO_write(s->wbio, (char *) |
1006 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
1007 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1008 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
7ee8627f MC |
1009 | if (i >= 0) |
1010 | tmpwrit = i; | |
0f113f3e MC |
1011 | } else { |
1012 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); | |
1013 | i = -1; | |
1014 | } | |
7ee8627f | 1015 | if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { |
d102d9df | 1016 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
7ee8627f | 1017 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
d102d9df MC |
1018 | if (currbuf + 1 < s->rlayer.numwpipes) |
1019 | continue; | |
0f113f3e | 1020 | s->rwstate = SSL_NOTHING; |
7ee8627f MC |
1021 | *written = s->rlayer.wpend_ret; |
1022 | return 1; | |
0f113f3e | 1023 | } else if (i <= 0) { |
5e8b24db | 1024 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1025 | /* |
1026 | * For DTLS, just drop it. That's kind of the whole point in | |
1027 | * using a datagram service | |
1028 | */ | |
d102d9df | 1029 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 1030 | } |
beacb0f0 | 1031 | return (i); |
0f113f3e | 1032 | } |
7ee8627f MC |
1033 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
1034 | SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); | |
0f113f3e MC |
1035 | } |
1036 | } | |
d02b48c6 | 1037 | |
1d97c843 TH |
1038 | /*- |
1039 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1040 | * 'type' is one of the following: |
1041 | * | |
1042 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1043 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1044 | * - 0 (during a shutdown, no data has to be returned) | |
1045 | * | |
1046 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1047 | * (possibly multiple records if we still don't have anything to return). | |
1048 | * | |
1049 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1050 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1051 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1052 | * argument is non NULL. | |
b35e9050 BM |
1053 | * Also if record payloads contain fragments too small to process, we store |
1054 | * them until there is enough for the respective protocol (the record protocol | |
1055 | * may use arbitrary fragmentation and even interleaving): | |
1056 | * Change cipher spec protocol | |
1057 | * just 1 byte needed, no need for keeping anything stored | |
1058 | * Alert protocol | |
1059 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1060 | * Handshake protocol | |
1061 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1062 | * to detect unexpected Client Hello and Hello Request messages | |
1063 | * here, anything else is handled by higher layers | |
1064 | * Application data protocol | |
1065 | * none of our business | |
1066 | */ | |
657da85e | 1067 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
54105ddd | 1068 | size_t len, int peek, size_t *readbytes) |
0f113f3e MC |
1069 | { |
1070 | int al, i, j, ret; | |
54105ddd | 1071 | size_t n, curr_rec, num_recs, totalbytes; |
0f113f3e | 1072 | SSL3_RECORD *rr; |
94777c9c | 1073 | SSL3_BUFFER *rbuf; |
0f113f3e MC |
1074 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
1075 | ||
94777c9c MC |
1076 | rbuf = &s->rlayer.rbuf; |
1077 | ||
1078 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1079 | /* Not initialized yet */ |
0f113f3e | 1080 | if (!ssl3_setup_read_buffer(s)) |
eda75751 | 1081 | return -1; |
28d59af8 | 1082 | } |
0f113f3e MC |
1083 | |
1084 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1085 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1086 | && (type != | |
1087 | SSL3_RT_APPLICATION_DATA))) { | |
1088 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1089 | return -1; | |
1090 | } | |
1091 | ||
4aa7389e | 1092 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1093 | /* (partially) satisfy request from storage */ |
1094 | { | |
4aa7389e | 1095 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1096 | unsigned char *dst = buf; |
1097 | unsigned int k; | |
1098 | ||
1099 | /* peek == 0 */ | |
1100 | n = 0; | |
4aa7389e | 1101 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1102 | *dst++ = *src++; |
1103 | len--; | |
4aa7389e | 1104 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1105 | n++; |
1106 | } | |
1107 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1108 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1109 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1110 | |
1111 | if (recvd_type != NULL) | |
1112 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1113 | ||
54105ddd | 1114 | *readbytes = n; |
eda75751 | 1115 | return 1; |
0f113f3e MC |
1116 | } |
1117 | ||
1118 | /* | |
4aa7389e | 1119 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1120 | */ |
1121 | ||
024f543c | 1122 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1123 | /* type == SSL3_RT_APPLICATION_DATA */ |
1124 | i = s->handshake_func(s); | |
1125 | if (i < 0) | |
eda75751 | 1126 | return i; |
0f113f3e MC |
1127 | if (i == 0) { |
1128 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1129 | return -1; |
0f113f3e MC |
1130 | } |
1131 | } | |
1132 | start: | |
1133 | s->rwstate = SSL_NOTHING; | |
1134 | ||
50e735f9 | 1135 | /*- |
94777c9c MC |
1136 | * For each record 'i' up to |num_recs] |
1137 | * rr[i].type - is the type of record | |
1138 | * rr[i].data, - data | |
1139 | * rr[i].off, - offset into 'data' for next read | |
1140 | * rr[i].length, - number of bytes. | |
50e735f9 | 1141 | */ |
94777c9c MC |
1142 | rr = s->rlayer.rrec; |
1143 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1144 | ||
1145 | do { | |
1146 | /* get new records if necessary */ | |
1147 | if (num_recs == 0) { | |
1148 | ret = ssl3_get_record(s); | |
1149 | if (ret <= 0) | |
eda75751 | 1150 | return ret; |
94777c9c MC |
1151 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); |
1152 | if (num_recs == 0) { | |
1153 | /* Shouldn't happen */ | |
1154 | al = SSL_AD_INTERNAL_ERROR; | |
1155 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1156 | goto f_err; | |
1157 | } | |
1158 | } | |
255cfeac | 1159 | /* Skip over any records we have already read */ |
94777c9c | 1160 | for (curr_rec = 0; |
255cfeac | 1161 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1162 | curr_rec++) ; |
94777c9c MC |
1163 | if (curr_rec == num_recs) { |
1164 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1165 | num_recs = 0; | |
1166 | curr_rec = 0; | |
1167 | } | |
1168 | } while (num_recs == 0); | |
1169 | rr = &rr[curr_rec]; | |
0f113f3e | 1170 | |
af58be76 MC |
1171 | /* |
1172 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1173 | * record that isn't an alert. | |
1174 | */ | |
1175 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1176 | && SSL3_RECORD_get_length(rr) != 0) | |
1177 | s->rlayer.alert_count = 0; | |
1178 | ||
0f113f3e MC |
1179 | /* we now have a packet which can be read and processed */ |
1180 | ||
1181 | if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, | |
1182 | * reset by ssl3_get_finished */ | |
747e1639 | 1183 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
1184 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1185 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1186 | goto f_err; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * If the other end has shut down, throw anything we read away (even in | |
1191 | * 'peek' mode) | |
1192 | */ | |
1193 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1194 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e | 1195 | s->rwstate = SSL_NOTHING; |
eda75751 | 1196 | return 0; |
0f113f3e MC |
1197 | } |
1198 | ||
657da85e | 1199 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e EK |
1200 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1201 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) { | |
657da85e MC |
1202 | /* |
1203 | * SSL3_RT_APPLICATION_DATA or | |
1204 | * SSL3_RT_HANDSHAKE or | |
1205 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1206 | */ | |
0f113f3e MC |
1207 | /* |
1208 | * make sure that we are not getting application data when we are | |
1209 | * doing a handshake for the first time | |
1210 | */ | |
1211 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1212 | (s->enc_read_ctx == NULL)) { | |
1213 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1214 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE); | |
1215 | goto f_err; | |
1216 | } | |
1217 | ||
657da85e | 1218 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1219 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1220 | && s->rlayer.handshake_fragment_len > 0) { | |
657da85e MC |
1221 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1222 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1223 | goto f_err; | |
1224 | } | |
1225 | ||
1226 | if (recvd_type != NULL) | |
1227 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1228 | ||
eda75751 MC |
1229 | if (len == 0) |
1230 | return 0; | |
0f113f3e | 1231 | |
54105ddd | 1232 | totalbytes = 0; |
94777c9c | 1233 | do { |
54105ddd | 1234 | if (len - totalbytes > SSL3_RECORD_get_length(rr)) |
94777c9c MC |
1235 | n = SSL3_RECORD_get_length(rr); |
1236 | else | |
54105ddd | 1237 | n = len - totalbytes; |
94777c9c MC |
1238 | |
1239 | memcpy(buf, &(rr->data[rr->off]), n); | |
1240 | buf += n; | |
b8d24395 MC |
1241 | if (peek) { |
1242 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1243 | if (SSL3_RECORD_get_length(rr) == 0) | |
1244 | SSL3_RECORD_set_read(rr); | |
1245 | } else { | |
753be41d | 1246 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1247 | SSL3_RECORD_add_off(rr, n); |
1248 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1249 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1250 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1251 | SSL3_RECORD_set_read(rr); |
94777c9c | 1252 | } |
0f113f3e | 1253 | } |
94777c9c MC |
1254 | if (SSL3_RECORD_get_length(rr) == 0 |
1255 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1256 | curr_rec++; | |
1257 | rr++; | |
1258 | } | |
54105ddd | 1259 | totalbytes += n; |
94777c9c | 1260 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs |
54105ddd MC |
1261 | && totalbytes < len); |
1262 | if (totalbytes == 0) { | |
255cfeac MC |
1263 | /* We must have read empty records. Get more data */ |
1264 | goto start; | |
1265 | } | |
94777c9c | 1266 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1267 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1268 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c | 1269 | ssl3_release_read_buffer(s); |
54105ddd | 1270 | *readbytes = totalbytes; |
eda75751 | 1271 | return 1; |
0f113f3e MC |
1272 | } |
1273 | ||
1274 | /* | |
1275 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1276 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1277 | * were actually expecting a CCS). | |
0f113f3e MC |
1278 | */ |
1279 | ||
32ec4153 MC |
1280 | /* |
1281 | * Lets just double check that we've not got an SSLv2 record | |
1282 | */ | |
1283 | if (rr->rec_version == SSL2_VERSION) { | |
1284 | /* | |
1285 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1286 | * record back if this is the first packet and we are looking for an | |
1287 | * initial ClientHello. Therefore |type| should always be equal to | |
1288 | * |rr->type|. If not then something has gone horribly wrong | |
1289 | */ | |
1290 | al = SSL_AD_INTERNAL_ERROR; | |
1291 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1292 | goto f_err; | |
1293 | } | |
1294 | ||
e8aa8b6c | 1295 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1296 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1297 | /* |
1298 | * If we've got this far and still haven't decided on what version | |
1299 | * we're using then this must be a client side alert we're dealing with | |
1300 | * (we don't allow heartbeats yet). We shouldn't be receiving anything | |
1301 | * other than a ClientHello if we are a server. | |
1302 | */ | |
1303 | s->version = rr->rec_version; | |
1304 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1305 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1306 | goto f_err; | |
1307 | } | |
1308 | ||
0f113f3e MC |
1309 | /* |
1310 | * In case of record types for which we have 'fragment' storage, fill | |
1311 | * that so that we can process the data at a fixed place. | |
1312 | */ | |
1313 | { | |
eda75751 | 1314 | size_t dest_maxlen = 0; |
0f113f3e | 1315 | unsigned char *dest = NULL; |
eda75751 | 1316 | size_t *dest_len = NULL; |
0f113f3e | 1317 | |
747e1639 | 1318 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
4aa7389e MC |
1319 | dest_maxlen = sizeof s->rlayer.handshake_fragment; |
1320 | dest = s->rlayer.handshake_fragment; | |
1321 | dest_len = &s->rlayer.handshake_fragment_len; | |
747e1639 | 1322 | } else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
4aa7389e MC |
1323 | dest_maxlen = sizeof s->rlayer.alert_fragment; |
1324 | dest = s->rlayer.alert_fragment; | |
1325 | dest_len = &s->rlayer.alert_fragment_len; | |
0f113f3e | 1326 | } |
b35e9050 | 1327 | |
0f113f3e MC |
1328 | if (dest_maxlen > 0) { |
1329 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
747e1639 MC |
1330 | if (SSL3_RECORD_get_length(rr) < n) |
1331 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
0f113f3e MC |
1332 | |
1333 | /* now move 'n' bytes: */ | |
1334 | while (n-- > 0) { | |
747e1639 MC |
1335 | dest[(*dest_len)++] = |
1336 | SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]; | |
1337 | SSL3_RECORD_add_off(rr, 1); | |
1338 | SSL3_RECORD_add_length(rr, -1); | |
0f113f3e MC |
1339 | } |
1340 | ||
63916e9a MC |
1341 | if (*dest_len < dest_maxlen) { |
1342 | SSL3_RECORD_set_read(rr); | |
0f113f3e | 1343 | goto start; /* fragment was too small */ |
63916e9a | 1344 | } |
0f113f3e MC |
1345 | } |
1346 | } | |
1347 | ||
50e735f9 | 1348 | /*- |
4aa7389e MC |
1349 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
1350 | * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT. | |
50e735f9 MC |
1351 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1352 | */ | |
0f113f3e MC |
1353 | |
1354 | /* If we are a client, check for an incoming 'Hello Request': */ | |
1355 | if ((!s->server) && | |
4aa7389e MC |
1356 | (s->rlayer.handshake_fragment_len >= 4) && |
1357 | (s->rlayer.handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) && | |
0f113f3e | 1358 | (s->session != NULL) && (s->session->cipher != NULL)) { |
4aa7389e | 1359 | s->rlayer.handshake_fragment_len = 0; |
0f113f3e | 1360 | |
4aa7389e MC |
1361 | if ((s->rlayer.handshake_fragment[1] != 0) || |
1362 | (s->rlayer.handshake_fragment[2] != 0) || | |
1363 | (s->rlayer.handshake_fragment[3] != 0)) { | |
0f113f3e MC |
1364 | al = SSL_AD_DECODE_ERROR; |
1365 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_BAD_HELLO_REQUEST); | |
1366 | goto f_err; | |
1367 | } | |
1368 | ||
1369 | if (s->msg_callback) | |
1370 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, | |
4aa7389e | 1371 | s->rlayer.handshake_fragment, 4, s, |
0f113f3e MC |
1372 | s->msg_callback_arg); |
1373 | ||
1374 | if (SSL_is_init_finished(s) && | |
1375 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && | |
1376 | !s->s3->renegotiate) { | |
1377 | ssl3_renegotiate(s); | |
1378 | if (ssl3_renegotiate_check(s)) { | |
1379 | i = s->handshake_func(s); | |
1380 | if (i < 0) | |
eda75751 | 1381 | return i; |
0f113f3e | 1382 | if (i == 0) { |
a230b26e | 1383 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); |
eda75751 | 1384 | return -1; |
0f113f3e MC |
1385 | } |
1386 | ||
1387 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1388 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1389 | /* no read-ahead left? */ |
0f113f3e MC |
1390 | BIO *bio; |
1391 | /* | |
1392 | * In the case where we try to read application data, | |
1393 | * but we trigger an SSL handshake, we return -1 with | |
1394 | * the retry option set. Otherwise renegotiation may | |
1395 | * cause nasty problems in the blocking world | |
1396 | */ | |
1397 | s->rwstate = SSL_READING; | |
1398 | bio = SSL_get_rbio(s); | |
1399 | BIO_clear_retry_flags(bio); | |
1400 | BIO_set_retry_read(bio); | |
eda75751 | 1401 | return -1; |
0f113f3e MC |
1402 | } |
1403 | } | |
1404 | } | |
1405 | } | |
1406 | /* | |
1407 | * we either finished a handshake or ignored the request, now try | |
1408 | * again to obtain the (application) data we were asked for | |
1409 | */ | |
1410 | goto start; | |
1411 | } | |
1412 | /* | |
1413 | * If we are a server and get a client hello when renegotiation isn't | |
1414 | * allowed send back a no renegotiation alert and carry on. WARNING: | |
1415 | * experimental code, needs reviewing (steve) | |
1416 | */ | |
1417 | if (s->server && | |
1418 | SSL_is_init_finished(s) && | |
1419 | !s->s3->send_connection_binding && | |
1420 | (s->version > SSL3_VERSION) && | |
4aa7389e MC |
1421 | (s->rlayer.handshake_fragment_len >= 4) && |
1422 | (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && | |
0f113f3e MC |
1423 | (s->session != NULL) && (s->session->cipher != NULL) && |
1424 | !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { | |
747e1639 | 1425 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1426 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
1427 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); |
1428 | goto start; | |
1429 | } | |
4aa7389e MC |
1430 | if (s->rlayer.alert_fragment_len >= 2) { |
1431 | int alert_level = s->rlayer.alert_fragment[0]; | |
1432 | int alert_descr = s->rlayer.alert_fragment[1]; | |
0f113f3e | 1433 | |
4aa7389e | 1434 | s->rlayer.alert_fragment_len = 0; |
0f113f3e MC |
1435 | |
1436 | if (s->msg_callback) | |
1437 | s->msg_callback(0, s->version, SSL3_RT_ALERT, | |
4aa7389e MC |
1438 | s->rlayer.alert_fragment, 2, s, |
1439 | s->msg_callback_arg); | |
0f113f3e MC |
1440 | |
1441 | if (s->info_callback != NULL) | |
1442 | cb = s->info_callback; | |
1443 | else if (s->ctx->info_callback != NULL) | |
1444 | cb = s->ctx->info_callback; | |
1445 | ||
1446 | if (cb != NULL) { | |
1447 | j = (alert_level << 8) | alert_descr; | |
1448 | cb(s, SSL_CB_READ_ALERT, j); | |
1449 | } | |
1450 | ||
fd865cad | 1451 | if (alert_level == SSL3_AL_WARNING) { |
0f113f3e | 1452 | s->s3->warn_alert = alert_descr; |
63916e9a | 1453 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1454 | |
1455 | s->rlayer.alert_count++; | |
1456 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
1457 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1458 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); | |
1459 | goto f_err; | |
1460 | } | |
1461 | ||
0f113f3e MC |
1462 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { |
1463 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
eda75751 | 1464 | return 0; |
0f113f3e MC |
1465 | } |
1466 | /* | |
1467 | * This is a warning but we receive it if we requested | |
1468 | * renegotiation and the peer denied it. Terminate with a fatal | |
8483a003 | 1469 | * alert because if application tried to renegotiate it |
0f113f3e MC |
1470 | * presumably had a good reason and expects it to succeed. In |
1471 | * future we might have a renegotiation where we don't care if | |
1472 | * the peer refused it where we carry on. | |
1473 | */ | |
1474 | else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { | |
1475 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1476 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); | |
1477 | goto f_err; | |
1478 | } | |
edc032b5 | 1479 | #ifdef SSL_AD_MISSING_SRP_USERNAME |
3c0c68ae MC |
1480 | else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME) |
1481 | return (0); | |
edc032b5 | 1482 | #endif |
fd865cad | 1483 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
1484 | char tmp[16]; |
1485 | ||
1486 | s->rwstate = SSL_NOTHING; | |
1487 | s->s3->fatal_alert = alert_descr; | |
1488 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); | |
1489 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
1490 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
1491 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1492 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1493 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 1494 | return 0; |
0f113f3e MC |
1495 | } else { |
1496 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1497 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1498 | goto f_err; | |
1499 | } | |
1500 | ||
1501 | goto start; | |
1502 | } | |
1503 | ||
1504 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
1505 | * shutdown */ | |
1506 | s->rwstate = SSL_NOTHING; | |
747e1639 | 1507 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1508 | SSL3_RECORD_set_read(rr); |
eda75751 | 1509 | return 0; |
0f113f3e MC |
1510 | } |
1511 | ||
747e1639 | 1512 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
657da85e MC |
1513 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1514 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1515 | goto f_err; | |
0f113f3e MC |
1516 | } |
1517 | ||
1518 | /* | |
1519 | * Unexpected handshake message (Client Hello, or protocol violation) | |
1520 | */ | |
024f543c | 1521 | if ((s->rlayer.handshake_fragment_len >= 4) |
a230b26e | 1522 | && !ossl_statem_get_in_handshake(s)) { |
49ae7423 | 1523 | if (SSL_is_init_finished(s) && |
0f113f3e | 1524 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) { |
fe3a3291 | 1525 | ossl_statem_set_in_init(s, 1); |
0f113f3e MC |
1526 | s->renegotiate = 1; |
1527 | s->new_session = 1; | |
1528 | } | |
1529 | i = s->handshake_func(s); | |
1530 | if (i < 0) | |
eda75751 | 1531 | return i; |
0f113f3e MC |
1532 | if (i == 0) { |
1533 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1534 | return -1; |
0f113f3e MC |
1535 | } |
1536 | ||
1537 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1538 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1539 | /* no read-ahead left? */ |
0f113f3e MC |
1540 | BIO *bio; |
1541 | /* | |
1542 | * In the case where we try to read application data, but we | |
1543 | * trigger an SSL handshake, we return -1 with the retry | |
1544 | * option set. Otherwise renegotiation may cause nasty | |
1545 | * problems in the blocking world | |
1546 | */ | |
1547 | s->rwstate = SSL_READING; | |
1548 | bio = SSL_get_rbio(s); | |
1549 | BIO_clear_retry_flags(bio); | |
1550 | BIO_set_retry_read(bio); | |
eda75751 | 1551 | return -1; |
0f113f3e MC |
1552 | } |
1553 | } | |
1554 | goto start; | |
1555 | } | |
1556 | ||
747e1639 | 1557 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1558 | default: |
0f113f3e | 1559 | /* |
436a2a01 MC |
1560 | * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but |
1561 | * TLS 1.2 says you MUST send an unexpected message alert. We use the | |
1562 | * TLS 1.2 behaviour for all protocol versions to prevent issues where | |
1563 | * no progress is being made and the peer continually sends unrecognised | |
1564 | * record types, using up resources processing them. | |
0f113f3e | 1565 | */ |
0f113f3e MC |
1566 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1567 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1568 | goto f_err; | |
1569 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
1570 | case SSL3_RT_ALERT: | |
1571 | case SSL3_RT_HANDSHAKE: | |
1572 | /* | |
1573 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1574 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1575 | * that should not happen when type != rr->type | |
0f113f3e MC |
1576 | */ |
1577 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1578 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1579 | goto f_err; | |
1580 | case SSL3_RT_APPLICATION_DATA: | |
1581 | /* | |
1582 | * At this point, we were expecting handshake data, but have | |
1583 | * application data. If the library was running inside ssl3_read() | |
1584 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1585 | * application data at this point (session renegotiation not yet | |
1586 | * started), we will indulge it. | |
1587 | */ | |
fe3a3291 | 1588 | if (ossl_statem_app_data_allowed(s)) { |
0f113f3e | 1589 | s->s3->in_read_app_data = 2; |
eda75751 | 1590 | return -1; |
0f113f3e MC |
1591 | } else { |
1592 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1593 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1594 | goto f_err; | |
1595 | } | |
1596 | } | |
1597 | /* not reached */ | |
1598 | ||
1599 | f_err: | |
1600 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
eda75751 | 1601 | return -1; |
0f113f3e | 1602 | } |
d02b48c6 | 1603 | |
14daae5a MC |
1604 | void ssl3_record_sequence_update(unsigned char *seq) |
1605 | { | |
1606 | int i; | |
1607 | ||
1608 | for (i = 7; i >= 0; i--) { | |
1609 | ++seq[i]; | |
1610 | if (seq[i] != 0) | |
1611 | break; | |
1612 | } | |
1613 | } | |
1614 | ||
d45ba43d MC |
1615 | /* |
1616 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1617 | * format and false otherwise. | |
1618 | */ | |
32ec4153 MC |
1619 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1620 | { | |
94777c9c | 1621 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1622 | } |
0f113f3e | 1623 | |
d45ba43d MC |
1624 | /* |
1625 | * Returns the length in bytes of the current rrec | |
1626 | */ | |
eda75751 | 1627 | size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1628 | { |
94777c9c | 1629 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1630 | } |