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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; | |
94777c9c | 36 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
c036e210 MC |
37 | } |
38 | ||
af9752e5 MC |
39 | void RECORD_LAYER_clear(RECORD_LAYER *rl) |
40 | { | |
d102d9df MC |
41 | unsigned int pipes; |
42 | ||
6b41b3f5 | 43 | rl->rstate = SSL_ST_READ_HEADER; |
af9752e5 | 44 | |
6b41b3f5 | 45 | /* Do I need to clear read_ahead? As far as I can tell read_ahead did not |
af9752e5 MC |
46 | * previously get reset by SSL_clear...so I'll keep it that way..but is |
47 | * that right? | |
48 | */ | |
6b41b3f5 MC |
49 | |
50 | rl->packet = NULL; | |
51 | rl->packet_length = 0; | |
52 | rl->wnum = 0; | |
53 | memset(rl->alert_fragment, 0, sizeof(rl->alert_fragment)); | |
54 | rl->alert_fragment_len = 0; | |
55 | memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); | |
56 | rl->handshake_fragment_len = 0; | |
57 | rl->wpend_tot = 0; | |
58 | rl->wpend_type = 0; | |
59 | rl->wpend_ret = 0; | |
60 | rl->wpend_buf = NULL; | |
61 | ||
62 | SSL3_BUFFER_clear(&rl->rbuf); | |
d102d9df MC |
63 | for(pipes = 0; pipes < rl->numwpipes; pipes++) |
64 | SSL3_BUFFER_clear(&rl->wbuf[pipes]); | |
65 | rl->numwpipes = 0; | |
94777c9c | 66 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
6b41b3f5 | 67 | |
95cdad63 MC |
68 | RECORD_LAYER_reset_read_sequence(rl); |
69 | RECORD_LAYER_reset_write_sequence(rl); | |
5fb6f80c | 70 | |
6b41b3f5 | 71 | if (rl->d) |
5fb6f80c | 72 | DTLS_RECORD_LAYER_clear(rl); |
af9752e5 MC |
73 | } |
74 | ||
f161995e MC |
75 | void RECORD_LAYER_release(RECORD_LAYER *rl) |
76 | { | |
77 | if (SSL3_BUFFER_is_initialised(&rl->rbuf)) | |
78 | ssl3_release_read_buffer(rl->s); | |
d102d9df | 79 | if (rl->numwpipes > 0) |
f161995e | 80 | ssl3_release_write_buffer(rl->s); |
94777c9c | 81 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
f161995e MC |
82 | } |
83 | ||
49580f25 | 84 | int RECORD_LAYER_read_pending(const RECORD_LAYER *rl) |
f161995e MC |
85 | { |
86 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; | |
87 | } | |
88 | ||
49580f25 | 89 | int RECORD_LAYER_write_pending(const RECORD_LAYER *rl) |
f161995e | 90 | { |
d102d9df MC |
91 | return (rl->numwpipes > 0) |
92 | && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes-1]) != 0; | |
f161995e MC |
93 | } |
94 | ||
bbcd6d7f MC |
95 | int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len) |
96 | { | |
7a7048af | 97 | rl->packet_length = len; |
61986d32 | 98 | if (len != 0) { |
295c3f41 | 99 | rl->rstate = SSL_ST_READ_HEADER; |
bbcd6d7f MC |
100 | if (!SSL3_BUFFER_is_initialised(&rl->rbuf)) |
101 | if (!ssl3_setup_read_buffer(rl->s)) | |
102 | return 0; | |
103 | } | |
104 | ||
7a7048af | 105 | rl->packet = SSL3_BUFFER_get_buf(&rl->rbuf); |
bbcd6d7f MC |
106 | SSL3_BUFFER_set_data(&rl->rbuf, buf, len); |
107 | ||
108 | return 1; | |
109 | } | |
110 | ||
de07f311 MC |
111 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
112 | { | |
95cdad63 | 113 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
114 | } |
115 | ||
116 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
117 | { | |
95cdad63 | 118 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
119 | } |
120 | ||
d5a25ae0 MC |
121 | int ssl3_pending(const SSL *s) |
122 | { | |
94777c9c MC |
123 | unsigned int i; |
124 | int num = 0; | |
125 | ||
295c3f41 | 126 | if (s->rlayer.rstate == SSL_ST_READ_BODY) |
d5a25ae0 MC |
127 | return 0; |
128 | ||
94777c9c MC |
129 | for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { |
130 | if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) | |
131 | != SSL3_RT_APPLICATION_DATA) | |
132 | return 0; | |
133 | num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); | |
134 | } | |
135 | ||
136 | return num; | |
d5a25ae0 MC |
137 | } |
138 | ||
dad78fb1 MC |
139 | void SSL_CTX_set_default_read_buffer_len(SSL_CTX *ctx, size_t len) |
140 | { | |
141 | ctx->default_read_buf_len = len; | |
142 | } | |
143 | ||
144 | void SSL_set_default_read_buffer_len(SSL *s, size_t len) | |
145 | { | |
146 | SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s->rlayer), len); | |
147 | } | |
148 | ||
295c3f41 MC |
149 | const char *SSL_rstate_string_long(const SSL *s) |
150 | { | |
295c3f41 MC |
151 | switch (s->rlayer.rstate) { |
152 | case SSL_ST_READ_HEADER: | |
475965f2 | 153 | return "read header"; |
295c3f41 | 154 | case SSL_ST_READ_BODY: |
475965f2 | 155 | return "read body"; |
295c3f41 | 156 | case SSL_ST_READ_DONE: |
475965f2 | 157 | return "read done"; |
295c3f41 | 158 | default: |
475965f2 | 159 | return "unknown"; |
295c3f41 | 160 | } |
295c3f41 MC |
161 | } |
162 | ||
163 | const char *SSL_rstate_string(const SSL *s) | |
164 | { | |
295c3f41 MC |
165 | switch (s->rlayer.rstate) { |
166 | case SSL_ST_READ_HEADER: | |
475965f2 | 167 | return "RH"; |
295c3f41 | 168 | case SSL_ST_READ_BODY: |
475965f2 | 169 | return "RB"; |
295c3f41 | 170 | case SSL_ST_READ_DONE: |
475965f2 | 171 | return "RD"; |
295c3f41 | 172 | default: |
475965f2 | 173 | return "unknown"; |
295c3f41 | 174 | } |
295c3f41 MC |
175 | } |
176 | ||
94777c9c | 177 | int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) |
0f113f3e MC |
178 | { |
179 | /* | |
180 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
181 | * packet by another n bytes. The packet will be in the sub-array of | |
182 | * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If | |
52e1d7b1 | 183 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 184 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
185 | * if clearold == 1, move the packet to the start of the buffer; if |
186 | * clearold == 0 then leave any old packets where they were | |
0f113f3e MC |
187 | */ |
188 | int i, len, left; | |
f4bd5de5 | 189 | size_t align = 0; |
0f113f3e MC |
190 | unsigned char *pkt; |
191 | SSL3_BUFFER *rb; | |
192 | ||
193 | if (n <= 0) | |
194 | return n; | |
195 | ||
88c23039 | 196 | rb = &s->rlayer.rbuf; |
0f113f3e MC |
197 | if (rb->buf == NULL) |
198 | if (!ssl3_setup_read_buffer(s)) | |
199 | return -1; | |
200 | ||
201 | left = rb->left; | |
a4d64c7f | 202 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 AP |
203 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
204 | align = (0-align) & (SSL3_ALIGN_PAYLOAD - 1); | |
a4d64c7f | 205 | #endif |
d02b48c6 | 206 | |
0f113f3e MC |
207 | if (!extend) { |
208 | /* start with empty packet ... */ | |
209 | if (left == 0) | |
210 | rb->offset = align; | |
211 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
212 | /* | |
213 | * check if next packet length is large enough to justify payload | |
214 | * alignment... | |
215 | */ | |
216 | pkt = rb->buf + rb->offset; | |
217 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
218 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
219 | /* | |
220 | * Note that even if packet is corrupted and its length field | |
221 | * is insane, we can only be led to wrong decision about | |
222 | * whether memmove will occur or not. Header values has no | |
223 | * effect on memmove arguments and therefore no buffer | |
224 | * overrun can be triggered. | |
225 | */ | |
226 | memmove(rb->buf + align, pkt, left); | |
227 | rb->offset = align; | |
228 | } | |
229 | } | |
7a7048af MC |
230 | s->rlayer.packet = rb->buf + rb->offset; |
231 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
232 | /* ... now we can act as if 'extend' was set */ |
233 | } | |
234 | ||
235 | /* | |
236 | * For DTLS/UDP reads should not span multiple packets because the read | |
237 | * operation returns the whole packet at once (as long as it fits into | |
238 | * the buffer). | |
239 | */ | |
240 | if (SSL_IS_DTLS(s)) { | |
241 | if (left == 0 && extend) | |
242 | return 0; | |
243 | if (left > 0 && n > left) | |
244 | n = left; | |
245 | } | |
246 | ||
247 | /* if there is enough in the buffer from a previous read, take some */ | |
248 | if (left >= n) { | |
7a7048af | 249 | s->rlayer.packet_length += n; |
0f113f3e MC |
250 | rb->left = left - n; |
251 | rb->offset += n; | |
252 | return (n); | |
253 | } | |
254 | ||
255 | /* else we need to read more data */ | |
256 | ||
7a7048af | 257 | len = s->rlayer.packet_length; |
0f113f3e MC |
258 | pkt = rb->buf + align; |
259 | /* | |
260 | * Move any available bytes to front of buffer: 'len' bytes already | |
261 | * pointed to by 'packet', 'left' extra ones at the end | |
262 | */ | |
94777c9c | 263 | if (s->rlayer.packet != pkt && clearold == 1) { /* len > 0 */ |
7a7048af MC |
264 | memmove(pkt, s->rlayer.packet, len + left); |
265 | s->rlayer.packet = pkt; | |
0f113f3e MC |
266 | rb->offset = len + align; |
267 | } | |
268 | ||
269 | if (n > (int)(rb->len - rb->offset)) { /* does not happen */ | |
270 | SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); | |
271 | return -1; | |
272 | } | |
273 | ||
8dd4ad0f | 274 | /* We always act like read_ahead is set for DTLS */ |
4118dfdc | 275 | if (!s->rlayer.read_ahead && !SSL_IS_DTLS(s)) |
0f113f3e MC |
276 | /* ignore max parameter */ |
277 | max = n; | |
278 | else { | |
279 | if (max < n) | |
280 | max = n; | |
281 | if (max > (int)(rb->len - rb->offset)) | |
282 | max = rb->len - rb->offset; | |
283 | } | |
284 | ||
285 | while (left < n) { | |
286 | /* | |
287 | * Now we have len+left bytes at the front of s->s3->rbuf.buf and | |
288 | * need to read in more until we have len+n (up to len+max if | |
289 | * possible) | |
290 | */ | |
291 | ||
292 | clear_sys_error(); | |
293 | if (s->rbio != NULL) { | |
294 | s->rwstate = SSL_READING; | |
295 | i = BIO_read(s->rbio, pkt + len + left, max - left); | |
296 | } else { | |
297 | SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); | |
298 | i = -1; | |
299 | } | |
300 | ||
301 | if (i <= 0) { | |
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); | |
306 | return (i); | |
307 | } | |
308 | left += i; | |
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 MC |
324 | s->rwstate = SSL_NOTHING; |
325 | return (n); | |
326 | } | |
327 | ||
d02b48c6 | 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 | */ |
52732b38 | 333 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) |
0f113f3e MC |
334 | { |
335 | const unsigned char *buf = buf_; | |
336 | int tot; | |
fa22f98f | 337 | unsigned int n, split_send_fragment, maxpipes; |
f1f7598c | 338 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
fa22f98f | 339 | unsigned int max_send_fragment, nw; |
dc2a1af8 | 340 | unsigned int u_len = (unsigned int)len; |
f1f7598c | 341 | #endif |
d102d9df | 342 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 343 | int i; |
0f113f3e MC |
344 | |
345 | if (len < 0) { | |
346 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_NEGATIVE_LENGTH); | |
347 | return -1; | |
348 | } | |
349 | ||
350 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 351 | tot = s->rlayer.wnum; |
0f113f3e MC |
352 | /* |
353 | * ensure that if we end up with a smaller value of data to write out | |
354 | * than the the original len from a write which didn't complete for | |
355 | * non-blocking I/O and also somehow ended up avoiding the check for | |
356 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
357 | * possible to end up with (len-tot) as a large number that will then | |
358 | * promptly send beyond the end of the users buffer ... so we trap and | |
359 | * report the error in a way the user will notice | |
360 | */ | |
1c2e5d56 | 361 | if ((unsigned int)len < s->rlayer.wnum) { |
0f113f3e | 362 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); |
1c2e5d56 MC |
363 | return -1; |
364 | } | |
365 | ||
366 | ||
367 | s->rlayer.wnum = 0; | |
368 | ||
369 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) { | |
370 | i = s->handshake_func(s); | |
371 | if (i < 0) | |
372 | return (i); | |
373 | if (i == 0) { | |
374 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
375 | return -1; | |
376 | } | |
0f113f3e MC |
377 | } |
378 | ||
379 | /* | |
380 | * first check if there is a SSL3_BUFFER still being written out. This | |
381 | * will happen with non blocking IO | |
382 | */ | |
383 | if (wb->left != 0) { | |
f8caa3c8 | 384 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot); |
0f113f3e MC |
385 | if (i <= 0) { |
386 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 387 | s->rlayer.wnum = tot; |
0f113f3e MC |
388 | return i; |
389 | } | |
390 | tot += i; /* this might be last fragment */ | |
391 | } | |
a9c6edcd | 392 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
393 | /* |
394 | * Depending on platform multi-block can deliver several *times* | |
395 | * better performance. Downside is that it has to allocate | |
8483a003 | 396 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
397 | * compromise is considered worthy. |
398 | */ | |
399 | if (type == SSL3_RT_APPLICATION_DATA && | |
400 | u_len >= 4 * (max_send_fragment = s->max_send_fragment) && | |
401 | s->compress == NULL && s->msg_callback == NULL && | |
402 | !SSL_USE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && | |
846ec07d | 403 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
404 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
405 | unsigned char aad[13]; | |
406 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
407 | int packlen; | |
408 | ||
409 | /* minimize address aliasing conflicts */ | |
410 | if ((max_send_fragment & 0xfff) == 0) | |
411 | max_send_fragment -= 512; | |
412 | ||
413 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
414 | ssl3_release_write_buffer(s); | |
415 | ||
416 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
417 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
418 | max_send_fragment, NULL); | |
419 | ||
420 | if (u_len >= 8 * max_send_fragment) | |
421 | packlen *= 8; | |
422 | else | |
423 | packlen *= 4; | |
424 | ||
425 | wb->buf = OPENSSL_malloc(packlen); | |
a71edf3b | 426 | if (wb->buf == NULL) { |
918bb865 MC |
427 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); |
428 | return -1; | |
429 | } | |
0f113f3e MC |
430 | wb->len = packlen; |
431 | } else if (tot == len) { /* done? */ | |
432 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
433 | wb->buf = NULL; | |
434 | return tot; | |
435 | } | |
436 | ||
437 | n = (len - tot); | |
438 | for (;;) { | |
439 | if (n < 4 * max_send_fragment) { | |
440 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
441 | wb->buf = NULL; | |
442 | break; | |
443 | } | |
444 | ||
445 | if (s->s3->alert_dispatch) { | |
446 | i = s->method->ssl_dispatch_alert(s); | |
447 | if (i <= 0) { | |
e2228d31 | 448 | s->rlayer.wnum = tot; |
0f113f3e MC |
449 | return i; |
450 | } | |
451 | } | |
452 | ||
453 | if (n >= 8 * max_send_fragment) | |
454 | nw = max_send_fragment * (mb_param.interleave = 8); | |
455 | else | |
456 | nw = max_send_fragment * (mb_param.interleave = 4); | |
457 | ||
de07f311 | 458 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
459 | aad[8] = type; |
460 | aad[9] = (unsigned char)(s->version >> 8); | |
461 | aad[10] = (unsigned char)(s->version); | |
462 | aad[11] = 0; | |
463 | aad[12] = 0; | |
464 | mb_param.out = NULL; | |
465 | mb_param.inp = aad; | |
466 | mb_param.len = nw; | |
467 | ||
468 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
469 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, | |
470 | sizeof(mb_param), &mb_param); | |
471 | ||
472 | if (packlen <= 0 || packlen > (int)wb->len) { /* never happens */ | |
473 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
474 | wb->buf = NULL; | |
475 | break; | |
476 | } | |
477 | ||
478 | mb_param.out = wb->buf; | |
479 | mb_param.inp = &buf[tot]; | |
480 | mb_param.len = nw; | |
481 | ||
482 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
483 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
484 | sizeof(mb_param), &mb_param) <= 0) | |
485 | return -1; | |
486 | ||
de07f311 MC |
487 | s->rlayer.write_sequence[7] += mb_param.interleave; |
488 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 489 | int j = 6; |
de07f311 | 490 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
491 | } |
492 | ||
493 | wb->offset = 0; | |
494 | wb->left = packlen; | |
495 | ||
f8caa3c8 MC |
496 | s->rlayer.wpend_tot = nw; |
497 | s->rlayer.wpend_buf = &buf[tot]; | |
498 | s->rlayer.wpend_type = type; | |
499 | s->rlayer.wpend_ret = nw; | |
0f113f3e MC |
500 | |
501 | i = ssl3_write_pending(s, type, &buf[tot], nw); | |
502 | if (i <= 0) { | |
1d2a18dc | 503 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
0f113f3e MC |
504 | OPENSSL_free(wb->buf); |
505 | wb->buf = NULL; | |
506 | } | |
e2228d31 | 507 | s->rlayer.wnum = tot; |
0f113f3e MC |
508 | return i; |
509 | } | |
510 | if (i == (int)n) { | |
511 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
512 | wb->buf = NULL; | |
513 | return tot + i; | |
514 | } | |
515 | n -= i; | |
516 | tot += i; | |
517 | } | |
518 | } else | |
a9c6edcd | 519 | #endif |
0f113f3e MC |
520 | if (tot == len) { /* done? */ |
521 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
522 | ssl3_release_write_buffer(s); | |
523 | ||
524 | return tot; | |
525 | } | |
526 | ||
527 | n = (len - tot); | |
d102d9df MC |
528 | |
529 | split_send_fragment = s->split_send_fragment; | |
530 | /* | |
531 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 532 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
533 | * processing then we also only use 1 pipeline, or if we're not using |
534 | * explicit IVs | |
535 | */ | |
536 | maxpipes = s->max_pipelines; | |
537 | if (maxpipes > SSL_MAX_PIPELINES) { | |
538 | /* | |
539 | * We should have prevented this when we set max_pipelines so we | |
540 | * shouldn't get here | |
541 | */ | |
542 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); | |
543 | return -1; | |
544 | } | |
545 | if (maxpipes == 0 | |
546 | || s->enc_write_ctx == NULL | |
547 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
548 | & EVP_CIPH_FLAG_PIPELINE) | |
549 | || !SSL_USE_EXPLICIT_IV(s)) | |
550 | maxpipes = 1; | |
551 | if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment | |
552 | || split_send_fragment == 0) { | |
553 | /* | |
554 | * We should have prevented this when we set the split and max send | |
555 | * fragments so we shouldn't get here | |
556 | */ | |
557 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); | |
558 | return -1; | |
559 | } | |
560 | ||
0f113f3e | 561 | for (;;) { |
d102d9df MC |
562 | unsigned int pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
563 | unsigned int numpipes, j; | |
564 | ||
565 | if (n == 0) | |
566 | numpipes = 1; | |
0f113f3e | 567 | else |
d102d9df MC |
568 | numpipes = ((n - 1) / split_send_fragment) + 1; |
569 | if (numpipes > maxpipes) | |
570 | numpipes = maxpipes; | |
571 | ||
572 | if (n / numpipes >= s->max_send_fragment) { | |
573 | /* | |
574 | * We have enough data to completely fill all available | |
575 | * pipelines | |
576 | */ | |
577 | for (j = 0; j < numpipes; j++) { | |
578 | pipelens[j] = s->max_send_fragment; | |
579 | } | |
580 | } else { | |
581 | /* We can partially fill all available pipelines */ | |
582 | tmppipelen = n / numpipes; | |
583 | remain = n % numpipes; | |
584 | for (j = 0; j < numpipes; j++) { | |
585 | pipelens[j] = tmppipelen; | |
586 | if (j < remain) | |
587 | pipelens[j]++; | |
588 | } | |
589 | } | |
0f113f3e | 590 | |
d102d9df | 591 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0); |
0f113f3e MC |
592 | if (i <= 0) { |
593 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 594 | s->rlayer.wnum = tot; |
0f113f3e MC |
595 | return i; |
596 | } | |
597 | ||
598 | if ((i == (int)n) || | |
599 | (type == SSL3_RT_APPLICATION_DATA && | |
600 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
601 | /* | |
602 | * next chunk of data should get another prepended empty fragment | |
603 | * in ciphersuites with known-IV weakness: | |
604 | */ | |
605 | s->s3->empty_fragment_done = 0; | |
606 | ||
607 | if ((i == (int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && | |
608 | !SSL_IS_DTLS(s)) | |
609 | ssl3_release_write_buffer(s); | |
610 | ||
611 | return tot + i; | |
612 | } | |
613 | ||
614 | n -= i; | |
615 | tot += i; | |
616 | } | |
617 | } | |
d02b48c6 | 618 | |
c103c7e2 | 619 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
d102d9df MC |
620 | unsigned int *pipelens, unsigned int numpipes, |
621 | int create_empty_fragment) | |
0f113f3e | 622 | { |
d102d9df MC |
623 | unsigned char *outbuf[SSL_MAX_PIPELINES], *plen[SSL_MAX_PIPELINES]; |
624 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; | |
0f113f3e MC |
625 | int i, mac_size, clear = 0; |
626 | int prefix_len = 0; | |
627 | int eivlen; | |
f4bd5de5 | 628 | size_t align = 0; |
d102d9df | 629 | SSL3_BUFFER *wb; |
0f113f3e | 630 | SSL_SESSION *sess; |
d102d9df MC |
631 | unsigned int totlen = 0; |
632 | unsigned int j; | |
0f113f3e | 633 | |
d102d9df MC |
634 | for (j = 0; j < numpipes; j++) |
635 | totlen += pipelens[j]; | |
0f113f3e MC |
636 | /* |
637 | * first check if there is a SSL3_BUFFER still being written out. This | |
638 | * will happen with non blocking IO | |
639 | */ | |
d102d9df MC |
640 | if (RECORD_LAYER_write_pending(&s->rlayer)) |
641 | return (ssl3_write_pending(s, type, buf, totlen)); | |
0f113f3e MC |
642 | |
643 | /* If we have an alert to send, lets send it */ | |
644 | if (s->s3->alert_dispatch) { | |
645 | i = s->method->ssl_dispatch_alert(s); | |
646 | if (i <= 0) | |
647 | return (i); | |
648 | /* if it went, fall through and send more stuff */ | |
649 | } | |
650 | ||
d102d9df MC |
651 | if (s->rlayer.numwpipes < numpipes) |
652 | if (!ssl3_setup_write_buffer(s, numpipes)) | |
0f113f3e MC |
653 | return -1; |
654 | ||
d102d9df | 655 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
656 | return 0; |
657 | ||
0f113f3e MC |
658 | sess = s->session; |
659 | ||
660 | if ((sess == NULL) || | |
661 | (s->enc_write_ctx == NULL) || | |
662 | (EVP_MD_CTX_md(s->write_hash) == NULL)) { | |
0f113f3e | 663 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
664 | mac_size = 0; |
665 | } else { | |
666 | mac_size = EVP_MD_CTX_size(s->write_hash); | |
667 | if (mac_size < 0) | |
668 | goto err; | |
669 | } | |
d02b48c6 | 670 | |
0f113f3e MC |
671 | /* |
672 | * 'create_empty_fragment' is true only when this function calls itself | |
673 | */ | |
674 | if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done) { | |
675 | /* | |
676 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
677 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
678 | */ | |
679 | ||
680 | if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { | |
681 | /* | |
682 | * recursive function call with 'create_empty_fragment' set; this | |
683 | * prepares and buffers the data for an empty fragment (these | |
684 | * 'prefix_len' bytes are sent out later together with the actual | |
685 | * payload) | |
686 | */ | |
d102d9df MC |
687 | unsigned int tmppipelen = 0; |
688 | ||
689 | prefix_len = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1); | |
0f113f3e MC |
690 | if (prefix_len <= 0) |
691 | goto err; | |
692 | ||
693 | if (prefix_len > | |
694 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) | |
695 | { | |
696 | /* insufficient space */ | |
697 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
698 | goto err; | |
699 | } | |
700 | } | |
701 | ||
702 | s->s3->empty_fragment_done = 1; | |
703 | } | |
704 | ||
705 | if (create_empty_fragment) { | |
d102d9df | 706 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 707 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
708 | /* |
709 | * extra fragment would be couple of cipher blocks, which would be | |
710 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
8483a003 | 711 | * payload, then we can just pretend we simply have two headers. |
0f113f3e | 712 | */ |
f4bd5de5 AP |
713 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
714 | align = (0-align) & (SSL3_ALIGN_PAYLOAD - 1); | |
a4d64c7f | 715 | #endif |
d102d9df | 716 | outbuf[0] = SSL3_BUFFER_get_buf(wb) + align; |
747e1639 | 717 | SSL3_BUFFER_set_offset(wb, align); |
0f113f3e | 718 | } else if (prefix_len) { |
d102d9df MC |
719 | wb = &s->rlayer.wbuf[0]; |
720 | outbuf[0] = SSL3_BUFFER_get_buf(wb) + SSL3_BUFFER_get_offset(wb) | |
721 | + prefix_len; | |
0f113f3e | 722 | } else { |
d102d9df MC |
723 | for (j=0; j < numpipes; j++) { |
724 | wb = &s->rlayer.wbuf[j]; | |
a4d64c7f | 725 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
d102d9df MC |
726 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
727 | align = (-align) & (SSL3_ALIGN_PAYLOAD - 1); | |
a4d64c7f | 728 | #endif |
d102d9df MC |
729 | outbuf[j] = SSL3_BUFFER_get_buf(wb) + align; |
730 | SSL3_BUFFER_set_offset(wb, align); | |
731 | } | |
0f113f3e MC |
732 | } |
733 | ||
0f113f3e MC |
734 | /* Explicit IV length, block ciphers appropriate version flag */ |
735 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s)) { | |
736 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); | |
737 | if (mode == EVP_CIPH_CBC_MODE) { | |
738 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); | |
739 | if (eivlen <= 1) | |
740 | eivlen = 0; | |
741 | } | |
742 | /* Need explicit part of IV for GCM mode */ | |
743 | else if (mode == EVP_CIPH_GCM_MODE) | |
744 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
e75c5a79 DSH |
745 | else if (mode == EVP_CIPH_CCM_MODE) |
746 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
0f113f3e MC |
747 | else |
748 | eivlen = 0; | |
749 | } else | |
750 | eivlen = 0; | |
751 | ||
747e1639 | 752 | |
d102d9df MC |
753 | totlen = 0; |
754 | /* Clear our SSL3_RECORD structures */ | |
755 | memset(wr, 0, sizeof wr); | |
756 | for (j=0; j < numpipes; j++) { | |
757 | /* write the header */ | |
758 | *(outbuf[j]++) = type & 0xff; | |
759 | SSL3_RECORD_set_type(&wr[j], type); | |
0f113f3e | 760 | |
d102d9df MC |
761 | *(outbuf[j]++) = (s->version >> 8); |
762 | /* | |
8483a003 | 763 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
764 | * and record version number > TLS 1.0 |
765 | */ | |
766 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
767 | && !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION) | |
768 | *(outbuf[j]++) = 0x1; | |
769 | else | |
770 | *(outbuf[j]++) = s->version & 0xff; | |
0f113f3e | 771 | |
d102d9df MC |
772 | /* field where we are to write out packet length */ |
773 | plen[j] = outbuf[j]; | |
774 | outbuf[j] += 2; | |
0f113f3e | 775 | |
d102d9df MC |
776 | /* lets setup the record stuff. */ |
777 | SSL3_RECORD_set_data(&wr[j], outbuf[j] + eivlen); | |
778 | SSL3_RECORD_set_length(&wr[j], (int)pipelens[j]); | |
779 | SSL3_RECORD_set_input(&wr[j], (unsigned char *)&buf[totlen]); | |
780 | totlen += pipelens[j]; | |
0f113f3e | 781 | |
d102d9df MC |
782 | /* |
783 | * we now 'read' from wr->input, wr->length bytes into wr->data | |
784 | */ | |
0f113f3e | 785 | |
d102d9df MC |
786 | /* first we compress */ |
787 | if (s->compress != NULL) { | |
788 | if (!ssl3_do_compress(s, &wr[j])) { | |
789 | SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); | |
790 | goto err; | |
791 | } | |
792 | } else { | |
793 | memcpy(wr[j].data, wr[j].input, wr[j].length); | |
794 | SSL3_RECORD_reset_input(&wr[j]); | |
795 | } | |
0f113f3e | 796 | |
0f113f3e | 797 | /* |
d102d9df MC |
798 | * we should still have the output to wr->data and the input from |
799 | * wr->input. Length should be wr->length. wr->data still points in the | |
800 | * wb->buf | |
0f113f3e | 801 | */ |
0f113f3e | 802 | |
d102d9df MC |
803 | if (!SSL_USE_ETM(s) && mac_size != 0) { |
804 | if (s->method->ssl3_enc->mac(s, &wr[j], | |
805 | &(outbuf[j][wr[j].length + eivlen]), 1) < 0) | |
806 | goto err; | |
807 | SSL3_RECORD_add_length(&wr[j], mac_size); | |
808 | } | |
0f113f3e | 809 | |
d102d9df MC |
810 | |
811 | SSL3_RECORD_set_data(&wr[j], outbuf[j]); | |
812 | SSL3_RECORD_reset_input(&wr[j]); | |
813 | ||
814 | if (eivlen) { | |
815 | /* | |
816 | * if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err; | |
817 | */ | |
818 | SSL3_RECORD_add_length(&wr[j], eivlen); | |
819 | } | |
0f113f3e MC |
820 | } |
821 | ||
d102d9df MC |
822 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) |
823 | goto err; | |
0f113f3e | 824 | |
d102d9df MC |
825 | for (j=0; j < numpipes; j++) { |
826 | if (SSL_USE_ETM(s) && mac_size != 0) { | |
827 | if (s->method->ssl3_enc->mac(s, &wr[j], | |
828 | outbuf[j] + wr[j].length, 1) < 0) | |
829 | goto err; | |
830 | SSL3_RECORD_add_length(&wr[j], mac_size); | |
831 | } | |
0f113f3e | 832 | |
d102d9df MC |
833 | /* record length after mac and block padding */ |
834 | s2n(SSL3_RECORD_get_length(&wr[j]), plen[j]); | |
835 | ||
836 | if (s->msg_callback) | |
837 | s->msg_callback(1, 0, SSL3_RT_HEADER, plen[j] - 5, 5, s, | |
838 | s->msg_callback_arg); | |
0f113f3e | 839 | |
0f113f3e | 840 | /* |
d102d9df MC |
841 | * we should now have wr->data pointing to the encrypted data, which is |
842 | * wr->length long | |
0f113f3e | 843 | */ |
d102d9df MC |
844 | SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for debugging */ |
845 | SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); | |
846 | ||
847 | if (create_empty_fragment) { | |
848 | /* | |
849 | * we are in a recursive call; just return the length, don't write | |
850 | * out anything here | |
851 | */ | |
852 | if (j > 0) { | |
853 | /* We should never be pipelining an empty fragment!! */ | |
854 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
855 | goto err; | |
856 | } | |
857 | return SSL3_RECORD_get_length(wr); | |
858 | } | |
859 | ||
860 | /* now let's set up wb */ | |
861 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
862 | prefix_len + SSL3_RECORD_get_length(&wr[j])); | |
0f113f3e MC |
863 | } |
864 | ||
d102d9df | 865 | |
0f113f3e MC |
866 | |
867 | /* | |
868 | * memorize arguments so that ssl3_write_pending can detect bad write | |
869 | * retries later | |
870 | */ | |
d102d9df | 871 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
872 | s->rlayer.wpend_buf = buf; |
873 | s->rlayer.wpend_type = type; | |
d102d9df | 874 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
875 | |
876 | /* we now just need to write the buffer */ | |
d102d9df | 877 | return ssl3_write_pending(s, type, buf, totlen); |
0f113f3e MC |
878 | err: |
879 | return -1; | |
880 | } | |
d02b48c6 RE |
881 | |
882 | /* if s->s3->wbuf.left != 0, we need to call this */ | |
36d16f8e | 883 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, |
0f113f3e MC |
884 | unsigned int len) |
885 | { | |
886 | int i; | |
d102d9df MC |
887 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
888 | unsigned int currbuf = 0; | |
d02b48c6 | 889 | |
58964a49 | 890 | /* XXXX */ |
f8caa3c8 MC |
891 | if ((s->rlayer.wpend_tot > (int)len) |
892 | || ((s->rlayer.wpend_buf != buf) && | |
0f113f3e | 893 | !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) |
f8caa3c8 | 894 | || (s->rlayer.wpend_type != type)) { |
0f113f3e MC |
895 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
896 | return (-1); | |
897 | } | |
898 | ||
899 | for (;;) { | |
d102d9df MC |
900 | /* Loop until we find a buffer we haven't written out yet */ |
901 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
902 | && currbuf < s->rlayer.numwpipes - 1) { | |
903 | currbuf++; | |
904 | continue; | |
905 | } | |
0f113f3e MC |
906 | clear_sys_error(); |
907 | if (s->wbio != NULL) { | |
908 | s->rwstate = SSL_WRITING; | |
909 | i = BIO_write(s->wbio, | |
d102d9df MC |
910 | (char *)&(SSL3_BUFFER_get_buf(&wb[currbuf])[ |
911 | SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
912 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
0f113f3e MC |
913 | } else { |
914 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); | |
915 | i = -1; | |
916 | } | |
d102d9df MC |
917 | if (i == SSL3_BUFFER_get_left(&wb[currbuf])) { |
918 | SSL3_BUFFER_set_left(&wb[currbuf], 0); | |
919 | SSL3_BUFFER_add_offset(&wb[currbuf], i); | |
920 | if (currbuf + 1 < s->rlayer.numwpipes) | |
921 | continue; | |
0f113f3e | 922 | s->rwstate = SSL_NOTHING; |
f8caa3c8 | 923 | return (s->rlayer.wpend_ret); |
0f113f3e | 924 | } else if (i <= 0) { |
5e8b24db | 925 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
926 | /* |
927 | * For DTLS, just drop it. That's kind of the whole point in | |
928 | * using a datagram service | |
929 | */ | |
d102d9df | 930 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e MC |
931 | } |
932 | return (i); | |
933 | } | |
d102d9df MC |
934 | SSL3_BUFFER_add_offset(&wb[currbuf], i); |
935 | SSL3_BUFFER_add_left(&wb[currbuf], -i); | |
0f113f3e MC |
936 | } |
937 | } | |
d02b48c6 | 938 | |
1d97c843 TH |
939 | /*- |
940 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
941 | * 'type' is one of the following: |
942 | * | |
943 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
944 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
945 | * - 0 (during a shutdown, no data has to be returned) | |
946 | * | |
947 | * If we don't have stored data to work from, read a SSL/TLS record first | |
948 | * (possibly multiple records if we still don't have anything to return). | |
949 | * | |
950 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
951 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
952 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
953 | * argument is non NULL. | |
b35e9050 BM |
954 | * Also if record payloads contain fragments too small to process, we store |
955 | * them until there is enough for the respective protocol (the record protocol | |
956 | * may use arbitrary fragmentation and even interleaving): | |
957 | * Change cipher spec protocol | |
958 | * just 1 byte needed, no need for keeping anything stored | |
959 | * Alert protocol | |
960 | * 2 bytes needed (AlertLevel, AlertDescription) | |
961 | * Handshake protocol | |
962 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
963 | * to detect unexpected Client Hello and Hello Request messages | |
964 | * here, anything else is handled by higher layers | |
965 | * Application data protocol | |
966 | * none of our business | |
967 | */ | |
657da85e MC |
968 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
969 | int len, int peek) | |
0f113f3e MC |
970 | { |
971 | int al, i, j, ret; | |
94777c9c | 972 | unsigned int n, curr_rec, num_recs, read_bytes; |
0f113f3e | 973 | SSL3_RECORD *rr; |
94777c9c | 974 | SSL3_BUFFER *rbuf; |
0f113f3e MC |
975 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
976 | ||
94777c9c MC |
977 | rbuf = &s->rlayer.rbuf; |
978 | ||
979 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 980 | /* Not initialized yet */ |
0f113f3e MC |
981 | if (!ssl3_setup_read_buffer(s)) |
982 | return (-1); | |
28d59af8 | 983 | } |
0f113f3e MC |
984 | |
985 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
986 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
987 | && (type != | |
988 | SSL3_RT_APPLICATION_DATA))) { | |
989 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
990 | return -1; | |
991 | } | |
992 | ||
4aa7389e | 993 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
994 | /* (partially) satisfy request from storage */ |
995 | { | |
4aa7389e | 996 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
997 | unsigned char *dst = buf; |
998 | unsigned int k; | |
999 | ||
1000 | /* peek == 0 */ | |
1001 | n = 0; | |
4aa7389e | 1002 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1003 | *dst++ = *src++; |
1004 | len--; | |
4aa7389e | 1005 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1006 | n++; |
1007 | } | |
1008 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1009 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1010 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1011 | |
1012 | if (recvd_type != NULL) | |
1013 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1014 | ||
0f113f3e MC |
1015 | return n; |
1016 | } | |
1017 | ||
1018 | /* | |
4aa7389e | 1019 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1020 | */ |
1021 | ||
024f543c | 1022 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1023 | /* type == SSL3_RT_APPLICATION_DATA */ |
1024 | i = s->handshake_func(s); | |
1025 | if (i < 0) | |
1026 | return (i); | |
1027 | if (i == 0) { | |
1028 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
1029 | return (-1); | |
1030 | } | |
1031 | } | |
1032 | start: | |
1033 | s->rwstate = SSL_NOTHING; | |
1034 | ||
50e735f9 | 1035 | /*- |
94777c9c MC |
1036 | * For each record 'i' up to |num_recs] |
1037 | * rr[i].type - is the type of record | |
1038 | * rr[i].data, - data | |
1039 | * rr[i].off, - offset into 'data' for next read | |
1040 | * rr[i].length, - number of bytes. | |
50e735f9 | 1041 | */ |
94777c9c MC |
1042 | rr = s->rlayer.rrec; |
1043 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1044 | ||
1045 | do { | |
1046 | /* get new records if necessary */ | |
1047 | if (num_recs == 0) { | |
1048 | ret = ssl3_get_record(s); | |
1049 | if (ret <= 0) | |
1050 | return (ret); | |
1051 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1052 | if (num_recs == 0) { | |
1053 | /* Shouldn't happen */ | |
1054 | al = SSL_AD_INTERNAL_ERROR; | |
1055 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1056 | goto f_err; | |
1057 | } | |
1058 | } | |
1059 | /* Skip over any records we have already used or are zero in length */ | |
1060 | for (curr_rec = 0; | |
1061 | curr_rec < num_recs && SSL3_RECORD_get_length(&rr[curr_rec]) == 0; | |
1062 | curr_rec++); | |
1063 | if (curr_rec == num_recs) { | |
1064 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1065 | num_recs = 0; | |
1066 | curr_rec = 0; | |
1067 | } | |
1068 | } while (num_recs == 0); | |
1069 | rr = &rr[curr_rec]; | |
0f113f3e MC |
1070 | |
1071 | /* we now have a packet which can be read and processed */ | |
1072 | ||
1073 | if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, | |
1074 | * reset by ssl3_get_finished */ | |
747e1639 | 1075 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
1076 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1077 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1078 | goto f_err; | |
1079 | } | |
1080 | ||
1081 | /* | |
1082 | * If the other end has shut down, throw anything we read away (even in | |
1083 | * 'peek' mode) | |
1084 | */ | |
1085 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1086 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1087 | s->rwstate = SSL_NOTHING; |
1088 | return (0); | |
1089 | } | |
1090 | ||
657da85e MC |
1091 | if (type == SSL3_RECORD_get_type(rr) |
1092 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC | |
1093 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) { | |
1094 | /* | |
1095 | * SSL3_RT_APPLICATION_DATA or | |
1096 | * SSL3_RT_HANDSHAKE or | |
1097 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1098 | */ | |
0f113f3e MC |
1099 | /* |
1100 | * make sure that we are not getting application data when we are | |
1101 | * doing a handshake for the first time | |
1102 | */ | |
1103 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1104 | (s->enc_read_ctx == NULL)) { | |
1105 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1106 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE); | |
1107 | goto f_err; | |
1108 | } | |
1109 | ||
657da85e MC |
1110 | if (type == SSL3_RT_HANDSHAKE |
1111 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC | |
1112 | && s->rlayer.handshake_fragment_len > 0) { | |
1113 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1114 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1115 | goto f_err; | |
1116 | } | |
1117 | ||
1118 | if (recvd_type != NULL) | |
1119 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1120 | ||
0f113f3e MC |
1121 | if (len <= 0) |
1122 | return (len); | |
1123 | ||
94777c9c MC |
1124 | read_bytes = 0; |
1125 | do { | |
1126 | if ((unsigned int)len - read_bytes > SSL3_RECORD_get_length(rr)) | |
1127 | n = SSL3_RECORD_get_length(rr); | |
1128 | else | |
1129 | n = (unsigned int)len - read_bytes; | |
1130 | ||
1131 | memcpy(buf, &(rr->data[rr->off]), n); | |
1132 | buf += n; | |
1133 | if (!peek) { | |
1134 | SSL3_RECORD_add_length(rr, -n); | |
1135 | SSL3_RECORD_add_off(rr, n); | |
1136 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1137 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1138 | SSL3_RECORD_set_off(rr, 0); | |
1139 | } | |
0f113f3e | 1140 | } |
94777c9c MC |
1141 | if (SSL3_RECORD_get_length(rr) == 0 |
1142 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1143 | curr_rec++; | |
1144 | rr++; | |
1145 | } | |
1146 | read_bytes += n; | |
1147 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs | |
1148 | && read_bytes < (unsigned int)len); | |
1149 | if (!peek && curr_rec == num_recs | |
1150 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) | |
1151 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
1152 | ssl3_release_read_buffer(s); | |
1153 | return read_bytes; | |
0f113f3e MC |
1154 | } |
1155 | ||
1156 | /* | |
1157 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1158 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1159 | * were actually expecting a CCS). | |
0f113f3e MC |
1160 | */ |
1161 | ||
657da85e MC |
1162 | if (rr->type == SSL3_RT_HANDSHAKE && type == SSL3_RT_CHANGE_CIPHER_SPEC) { |
1163 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1164 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1165 | goto f_err; | |
1166 | } | |
1167 | ||
32ec4153 MC |
1168 | /* |
1169 | * Lets just double check that we've not got an SSLv2 record | |
1170 | */ | |
1171 | if (rr->rec_version == SSL2_VERSION) { | |
1172 | /* | |
1173 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1174 | * record back if this is the first packet and we are looking for an | |
1175 | * initial ClientHello. Therefore |type| should always be equal to | |
1176 | * |rr->type|. If not then something has gone horribly wrong | |
1177 | */ | |
1178 | al = SSL_AD_INTERNAL_ERROR; | |
1179 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1180 | goto f_err; | |
1181 | } | |
1182 | ||
d45ba43d | 1183 | if(s->method->version == TLS_ANY_VERSION |
13c9bb3e MC |
1184 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
1185 | /* | |
1186 | * If we've got this far and still haven't decided on what version | |
1187 | * we're using then this must be a client side alert we're dealing with | |
1188 | * (we don't allow heartbeats yet). We shouldn't be receiving anything | |
1189 | * other than a ClientHello if we are a server. | |
1190 | */ | |
1191 | s->version = rr->rec_version; | |
1192 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1193 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1194 | goto f_err; | |
1195 | } | |
1196 | ||
0f113f3e MC |
1197 | /* |
1198 | * In case of record types for which we have 'fragment' storage, fill | |
1199 | * that so that we can process the data at a fixed place. | |
1200 | */ | |
1201 | { | |
1202 | unsigned int dest_maxlen = 0; | |
1203 | unsigned char *dest = NULL; | |
1204 | unsigned int *dest_len = NULL; | |
1205 | ||
747e1639 | 1206 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
4aa7389e MC |
1207 | dest_maxlen = sizeof s->rlayer.handshake_fragment; |
1208 | dest = s->rlayer.handshake_fragment; | |
1209 | dest_len = &s->rlayer.handshake_fragment_len; | |
747e1639 | 1210 | } else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
4aa7389e MC |
1211 | dest_maxlen = sizeof s->rlayer.alert_fragment; |
1212 | dest = s->rlayer.alert_fragment; | |
1213 | dest_len = &s->rlayer.alert_fragment_len; | |
0f113f3e | 1214 | } |
b35e9050 | 1215 | |
0f113f3e MC |
1216 | if (dest_maxlen > 0) { |
1217 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
747e1639 MC |
1218 | if (SSL3_RECORD_get_length(rr) < n) |
1219 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
0f113f3e MC |
1220 | |
1221 | /* now move 'n' bytes: */ | |
1222 | while (n-- > 0) { | |
747e1639 MC |
1223 | dest[(*dest_len)++] = |
1224 | SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]; | |
1225 | SSL3_RECORD_add_off(rr, 1); | |
1226 | SSL3_RECORD_add_length(rr, -1); | |
0f113f3e MC |
1227 | } |
1228 | ||
1229 | if (*dest_len < dest_maxlen) | |
1230 | goto start; /* fragment was too small */ | |
1231 | } | |
1232 | } | |
1233 | ||
50e735f9 | 1234 | /*- |
4aa7389e MC |
1235 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
1236 | * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT. | |
50e735f9 MC |
1237 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1238 | */ | |
0f113f3e MC |
1239 | |
1240 | /* If we are a client, check for an incoming 'Hello Request': */ | |
1241 | if ((!s->server) && | |
4aa7389e MC |
1242 | (s->rlayer.handshake_fragment_len >= 4) && |
1243 | (s->rlayer.handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) && | |
0f113f3e | 1244 | (s->session != NULL) && (s->session->cipher != NULL)) { |
4aa7389e | 1245 | s->rlayer.handshake_fragment_len = 0; |
0f113f3e | 1246 | |
4aa7389e MC |
1247 | if ((s->rlayer.handshake_fragment[1] != 0) || |
1248 | (s->rlayer.handshake_fragment[2] != 0) || | |
1249 | (s->rlayer.handshake_fragment[3] != 0)) { | |
0f113f3e MC |
1250 | al = SSL_AD_DECODE_ERROR; |
1251 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_BAD_HELLO_REQUEST); | |
1252 | goto f_err; | |
1253 | } | |
1254 | ||
1255 | if (s->msg_callback) | |
1256 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, | |
4aa7389e | 1257 | s->rlayer.handshake_fragment, 4, s, |
0f113f3e MC |
1258 | s->msg_callback_arg); |
1259 | ||
1260 | if (SSL_is_init_finished(s) && | |
1261 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && | |
1262 | !s->s3->renegotiate) { | |
1263 | ssl3_renegotiate(s); | |
1264 | if (ssl3_renegotiate_check(s)) { | |
1265 | i = s->handshake_func(s); | |
1266 | if (i < 0) | |
1267 | return (i); | |
1268 | if (i == 0) { | |
1269 | SSLerr(SSL_F_SSL3_READ_BYTES, | |
1270 | SSL_R_SSL_HANDSHAKE_FAILURE); | |
1271 | return (-1); | |
1272 | } | |
1273 | ||
1274 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1275 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1276 | /* no read-ahead left? */ |
0f113f3e MC |
1277 | BIO *bio; |
1278 | /* | |
1279 | * In the case where we try to read application data, | |
1280 | * but we trigger an SSL handshake, we return -1 with | |
1281 | * the retry option set. Otherwise renegotiation may | |
1282 | * cause nasty problems in the blocking world | |
1283 | */ | |
1284 | s->rwstate = SSL_READING; | |
1285 | bio = SSL_get_rbio(s); | |
1286 | BIO_clear_retry_flags(bio); | |
1287 | BIO_set_retry_read(bio); | |
1288 | return (-1); | |
1289 | } | |
1290 | } | |
1291 | } | |
1292 | } | |
1293 | /* | |
1294 | * we either finished a handshake or ignored the request, now try | |
1295 | * again to obtain the (application) data we were asked for | |
1296 | */ | |
1297 | goto start; | |
1298 | } | |
1299 | /* | |
1300 | * If we are a server and get a client hello when renegotiation isn't | |
1301 | * allowed send back a no renegotiation alert and carry on. WARNING: | |
1302 | * experimental code, needs reviewing (steve) | |
1303 | */ | |
1304 | if (s->server && | |
1305 | SSL_is_init_finished(s) && | |
1306 | !s->s3->send_connection_binding && | |
1307 | (s->version > SSL3_VERSION) && | |
4aa7389e MC |
1308 | (s->rlayer.handshake_fragment_len >= 4) && |
1309 | (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && | |
0f113f3e MC |
1310 | (s->session != NULL) && (s->session->cipher != NULL) && |
1311 | !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { | |
747e1639 | 1312 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1313 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); |
1314 | goto start; | |
1315 | } | |
4aa7389e MC |
1316 | if (s->rlayer.alert_fragment_len >= 2) { |
1317 | int alert_level = s->rlayer.alert_fragment[0]; | |
1318 | int alert_descr = s->rlayer.alert_fragment[1]; | |
0f113f3e | 1319 | |
4aa7389e | 1320 | s->rlayer.alert_fragment_len = 0; |
0f113f3e MC |
1321 | |
1322 | if (s->msg_callback) | |
1323 | s->msg_callback(0, s->version, SSL3_RT_ALERT, | |
4aa7389e MC |
1324 | s->rlayer.alert_fragment, 2, s, |
1325 | s->msg_callback_arg); | |
0f113f3e MC |
1326 | |
1327 | if (s->info_callback != NULL) | |
1328 | cb = s->info_callback; | |
1329 | else if (s->ctx->info_callback != NULL) | |
1330 | cb = s->ctx->info_callback; | |
1331 | ||
1332 | if (cb != NULL) { | |
1333 | j = (alert_level << 8) | alert_descr; | |
1334 | cb(s, SSL_CB_READ_ALERT, j); | |
1335 | } | |
1336 | ||
fd865cad | 1337 | if (alert_level == SSL3_AL_WARNING) { |
0f113f3e MC |
1338 | s->s3->warn_alert = alert_descr; |
1339 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { | |
1340 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1341 | return (0); | |
1342 | } | |
1343 | /* | |
1344 | * This is a warning but we receive it if we requested | |
1345 | * renegotiation and the peer denied it. Terminate with a fatal | |
8483a003 | 1346 | * alert because if application tried to renegotiate it |
0f113f3e MC |
1347 | * presumably had a good reason and expects it to succeed. In |
1348 | * future we might have a renegotiation where we don't care if | |
1349 | * the peer refused it where we carry on. | |
1350 | */ | |
1351 | else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { | |
1352 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1353 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); | |
1354 | goto f_err; | |
1355 | } | |
edc032b5 | 1356 | #ifdef SSL_AD_MISSING_SRP_USERNAME |
0f113f3e MC |
1357 | else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME) |
1358 | return (0); | |
edc032b5 | 1359 | #endif |
fd865cad | 1360 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
1361 | char tmp[16]; |
1362 | ||
1363 | s->rwstate = SSL_NOTHING; | |
1364 | s->s3->fatal_alert = alert_descr; | |
1365 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); | |
1366 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
1367 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
1368 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1369 | SSL_CTX_remove_session(s->ctx, s->session); | |
1370 | return (0); | |
1371 | } else { | |
1372 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1373 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1374 | goto f_err; | |
1375 | } | |
1376 | ||
1377 | goto start; | |
1378 | } | |
1379 | ||
1380 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
1381 | * shutdown */ | |
1382 | s->rwstate = SSL_NOTHING; | |
747e1639 | 1383 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1384 | return (0); |
1385 | } | |
1386 | ||
747e1639 | 1387 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
657da85e MC |
1388 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1389 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1390 | goto f_err; | |
0f113f3e MC |
1391 | } |
1392 | ||
1393 | /* | |
1394 | * Unexpected handshake message (Client Hello, or protocol violation) | |
1395 | */ | |
024f543c MC |
1396 | if ((s->rlayer.handshake_fragment_len >= 4) |
1397 | && !ossl_statem_get_in_handshake(s)) { | |
49ae7423 | 1398 | if (SSL_is_init_finished(s) && |
0f113f3e | 1399 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) { |
fe3a3291 | 1400 | ossl_statem_set_in_init(s, 1); |
0f113f3e MC |
1401 | s->renegotiate = 1; |
1402 | s->new_session = 1; | |
1403 | } | |
1404 | i = s->handshake_func(s); | |
1405 | if (i < 0) | |
1406 | return (i); | |
1407 | if (i == 0) { | |
1408 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
1409 | return (-1); | |
1410 | } | |
1411 | ||
1412 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1413 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1414 | /* no read-ahead left? */ |
0f113f3e MC |
1415 | BIO *bio; |
1416 | /* | |
1417 | * In the case where we try to read application data, but we | |
1418 | * trigger an SSL handshake, we return -1 with the retry | |
1419 | * option set. Otherwise renegotiation may cause nasty | |
1420 | * problems in the blocking world | |
1421 | */ | |
1422 | s->rwstate = SSL_READING; | |
1423 | bio = SSL_get_rbio(s); | |
1424 | BIO_clear_retry_flags(bio); | |
1425 | BIO_set_retry_read(bio); | |
1426 | return (-1); | |
1427 | } | |
1428 | } | |
1429 | goto start; | |
1430 | } | |
1431 | ||
747e1639 | 1432 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1433 | default: |
0f113f3e MC |
1434 | /* |
1435 | * TLS up to v1.1 just ignores unknown message types: TLS v1.2 give | |
1436 | * an unexpected message alert. | |
1437 | */ | |
1438 | if (s->version >= TLS1_VERSION && s->version <= TLS1_1_VERSION) { | |
747e1639 | 1439 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1440 | goto start; |
1441 | } | |
0f113f3e MC |
1442 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1443 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1444 | goto f_err; | |
1445 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
1446 | case SSL3_RT_ALERT: | |
1447 | case SSL3_RT_HANDSHAKE: | |
1448 | /* | |
1449 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1450 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1451 | * that should not happen when type != rr->type | |
0f113f3e MC |
1452 | */ |
1453 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1454 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1455 | goto f_err; | |
1456 | case SSL3_RT_APPLICATION_DATA: | |
1457 | /* | |
1458 | * At this point, we were expecting handshake data, but have | |
1459 | * application data. If the library was running inside ssl3_read() | |
1460 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1461 | * application data at this point (session renegotiation not yet | |
1462 | * started), we will indulge it. | |
1463 | */ | |
fe3a3291 | 1464 | if (ossl_statem_app_data_allowed(s)) { |
0f113f3e MC |
1465 | s->s3->in_read_app_data = 2; |
1466 | return (-1); | |
1467 | } else { | |
1468 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1469 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1470 | goto f_err; | |
1471 | } | |
1472 | } | |
1473 | /* not reached */ | |
1474 | ||
1475 | f_err: | |
1476 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0f113f3e MC |
1477 | return (-1); |
1478 | } | |
d02b48c6 | 1479 | |
14daae5a MC |
1480 | void ssl3_record_sequence_update(unsigned char *seq) |
1481 | { | |
1482 | int i; | |
1483 | ||
1484 | for (i = 7; i >= 0; i--) { | |
1485 | ++seq[i]; | |
1486 | if (seq[i] != 0) | |
1487 | break; | |
1488 | } | |
1489 | } | |
1490 | ||
d45ba43d MC |
1491 | /* |
1492 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1493 | * format and false otherwise. | |
1494 | */ | |
32ec4153 MC |
1495 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1496 | { | |
94777c9c | 1497 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1498 | } |
0f113f3e | 1499 | |
d45ba43d MC |
1500 | /* |
1501 | * Returns the length in bytes of the current rrec | |
1502 | */ | |
b821df5f | 1503 | unsigned int RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1504 | { |
94777c9c | 1505 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1506 | } |