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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 | ||
bbcd6d7f MC |
98 | int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len) |
99 | { | |
7a7048af | 100 | rl->packet_length = len; |
61986d32 | 101 | if (len != 0) { |
295c3f41 | 102 | rl->rstate = SSL_ST_READ_HEADER; |
bbcd6d7f MC |
103 | if (!SSL3_BUFFER_is_initialised(&rl->rbuf)) |
104 | if (!ssl3_setup_read_buffer(rl->s)) | |
105 | return 0; | |
106 | } | |
107 | ||
7a7048af | 108 | rl->packet = SSL3_BUFFER_get_buf(&rl->rbuf); |
bbcd6d7f MC |
109 | SSL3_BUFFER_set_data(&rl->rbuf, buf, len); |
110 | ||
111 | return 1; | |
112 | } | |
113 | ||
de07f311 MC |
114 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
115 | { | |
95cdad63 | 116 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
117 | } |
118 | ||
119 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
120 | { | |
95cdad63 | 121 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
122 | } |
123 | ||
d5a25ae0 MC |
124 | int ssl3_pending(const SSL *s) |
125 | { | |
94777c9c MC |
126 | unsigned int i; |
127 | int num = 0; | |
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 MC |
180 | /* |
181 | * Return values are as per SSL_read(), i.e. | |
182 | * >0 The number of read bytes | |
183 | * 0 Failure (not retryable) | |
184 | * <0 Failure (may be retryable) | |
185 | */ | |
94777c9c | 186 | int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) |
0f113f3e MC |
187 | { |
188 | /* | |
189 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
190 | * packet by another n bytes. The packet will be in the sub-array of | |
191 | * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If | |
52e1d7b1 | 192 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 193 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
194 | * if clearold == 1, move the packet to the start of the buffer; if |
195 | * clearold == 0 then leave any old packets where they were | |
0f113f3e MC |
196 | */ |
197 | int i, len, left; | |
f4bd5de5 | 198 | size_t align = 0; |
0f113f3e MC |
199 | unsigned char *pkt; |
200 | SSL3_BUFFER *rb; | |
201 | ||
202 | if (n <= 0) | |
203 | return n; | |
204 | ||
88c23039 | 205 | rb = &s->rlayer.rbuf; |
0f113f3e MC |
206 | if (rb->buf == NULL) |
207 | if (!ssl3_setup_read_buffer(s)) | |
208 | return -1; | |
209 | ||
210 | left = rb->left; | |
a4d64c7f | 211 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 | 212 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
753be41d | 213 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 214 | #endif |
d02b48c6 | 215 | |
0f113f3e MC |
216 | if (!extend) { |
217 | /* start with empty packet ... */ | |
218 | if (left == 0) | |
219 | rb->offset = align; | |
220 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
221 | /* | |
222 | * check if next packet length is large enough to justify payload | |
223 | * alignment... | |
224 | */ | |
225 | pkt = rb->buf + rb->offset; | |
226 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
227 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
228 | /* | |
229 | * Note that even if packet is corrupted and its length field | |
230 | * is insane, we can only be led to wrong decision about | |
231 | * whether memmove will occur or not. Header values has no | |
232 | * effect on memmove arguments and therefore no buffer | |
233 | * overrun can be triggered. | |
234 | */ | |
235 | memmove(rb->buf + align, pkt, left); | |
236 | rb->offset = align; | |
237 | } | |
238 | } | |
7a7048af MC |
239 | s->rlayer.packet = rb->buf + rb->offset; |
240 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
241 | /* ... now we can act as if 'extend' was set */ |
242 | } | |
243 | ||
244 | /* | |
245 | * For DTLS/UDP reads should not span multiple packets because the read | |
246 | * operation returns the whole packet at once (as long as it fits into | |
247 | * the buffer). | |
248 | */ | |
249 | if (SSL_IS_DTLS(s)) { | |
250 | if (left == 0 && extend) | |
251 | return 0; | |
252 | if (left > 0 && n > left) | |
253 | n = left; | |
254 | } | |
255 | ||
256 | /* if there is enough in the buffer from a previous read, take some */ | |
257 | if (left >= n) { | |
7a7048af | 258 | s->rlayer.packet_length += n; |
0f113f3e MC |
259 | rb->left = left - n; |
260 | rb->offset += n; | |
261 | return (n); | |
262 | } | |
263 | ||
264 | /* else we need to read more data */ | |
265 | ||
7a7048af | 266 | len = s->rlayer.packet_length; |
0f113f3e MC |
267 | pkt = rb->buf + align; |
268 | /* | |
269 | * Move any available bytes to front of buffer: 'len' bytes already | |
270 | * pointed to by 'packet', 'left' extra ones at the end | |
271 | */ | |
a230b26e | 272 | if (s->rlayer.packet != pkt && clearold == 1) { /* len > 0 */ |
7a7048af MC |
273 | memmove(pkt, s->rlayer.packet, len + left); |
274 | s->rlayer.packet = pkt; | |
0f113f3e MC |
275 | rb->offset = len + align; |
276 | } | |
277 | ||
278 | if (n > (int)(rb->len - rb->offset)) { /* does not happen */ | |
279 | SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); | |
280 | return -1; | |
281 | } | |
282 | ||
8dd4ad0f | 283 | /* We always act like read_ahead is set for DTLS */ |
4118dfdc | 284 | if (!s->rlayer.read_ahead && !SSL_IS_DTLS(s)) |
0f113f3e MC |
285 | /* ignore max parameter */ |
286 | max = n; | |
287 | else { | |
288 | if (max < n) | |
289 | max = n; | |
290 | if (max > (int)(rb->len - rb->offset)) | |
291 | max = rb->len - rb->offset; | |
292 | } | |
293 | ||
294 | while (left < n) { | |
295 | /* | |
296 | * Now we have len+left bytes at the front of s->s3->rbuf.buf and | |
297 | * need to read in more until we have len+n (up to len+max if | |
298 | * possible) | |
299 | */ | |
300 | ||
301 | clear_sys_error(); | |
302 | if (s->rbio != NULL) { | |
303 | s->rwstate = SSL_READING; | |
304 | i = BIO_read(s->rbio, pkt + len + left, max - left); | |
305 | } else { | |
306 | SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); | |
307 | i = -1; | |
308 | } | |
309 | ||
310 | if (i <= 0) { | |
311 | rb->left = left; | |
312 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
313 | if (len + left == 0) | |
314 | ssl3_release_read_buffer(s); | |
4880672a | 315 | return -1; |
0f113f3e MC |
316 | } |
317 | left += i; | |
318 | /* | |
319 | * reads should *never* span multiple packets for DTLS because the | |
320 | * underlying transport protocol is message oriented as opposed to | |
321 | * byte oriented as in the TLS case. | |
322 | */ | |
323 | if (SSL_IS_DTLS(s)) { | |
324 | if (n > left) | |
325 | n = left; /* makes the while condition false */ | |
326 | } | |
327 | } | |
328 | ||
329 | /* done reading, now the book-keeping */ | |
330 | rb->offset += n; | |
331 | rb->left = left - n; | |
7a7048af | 332 | s->rlayer.packet_length += n; |
0f113f3e MC |
333 | s->rwstate = SSL_NOTHING; |
334 | return (n); | |
335 | } | |
336 | ||
0f113f3e MC |
337 | /* |
338 | * Call this to write data in records of type 'type' It will return <= 0 if | |
339 | * not all data has been sent or non-blocking IO. | |
d02b48c6 | 340 | */ |
52732b38 | 341 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) |
0f113f3e MC |
342 | { |
343 | const unsigned char *buf = buf_; | |
344 | int tot; | |
fa22f98f | 345 | unsigned int n, split_send_fragment, maxpipes; |
f1f7598c | 346 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
fa22f98f | 347 | unsigned int max_send_fragment, nw; |
dc2a1af8 | 348 | unsigned int u_len = (unsigned int)len; |
f1f7598c | 349 | #endif |
d102d9df | 350 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 351 | int i; |
0f113f3e MC |
352 | |
353 | if (len < 0) { | |
354 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_NEGATIVE_LENGTH); | |
355 | return -1; | |
356 | } | |
357 | ||
358 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 359 | tot = s->rlayer.wnum; |
0f113f3e MC |
360 | /* |
361 | * ensure that if we end up with a smaller value of data to write out | |
362 | * than the the original len from a write which didn't complete for | |
363 | * non-blocking I/O and also somehow ended up avoiding the check for | |
364 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
365 | * possible to end up with (len-tot) as a large number that will then | |
366 | * promptly send beyond the end of the users buffer ... so we trap and | |
367 | * report the error in a way the user will notice | |
368 | */ | |
1c2e5d56 | 369 | if ((unsigned int)len < s->rlayer.wnum) { |
0f113f3e | 370 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); |
1c2e5d56 MC |
371 | return -1; |
372 | } | |
373 | ||
1c2e5d56 MC |
374 | s->rlayer.wnum = 0; |
375 | ||
376 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) { | |
377 | i = s->handshake_func(s); | |
378 | if (i < 0) | |
379 | return (i); | |
380 | if (i == 0) { | |
381 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
382 | return -1; | |
383 | } | |
0f113f3e MC |
384 | } |
385 | ||
386 | /* | |
387 | * first check if there is a SSL3_BUFFER still being written out. This | |
388 | * will happen with non blocking IO | |
389 | */ | |
390 | if (wb->left != 0) { | |
f8caa3c8 | 391 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot); |
0f113f3e MC |
392 | if (i <= 0) { |
393 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 394 | s->rlayer.wnum = tot; |
0f113f3e MC |
395 | return i; |
396 | } | |
397 | tot += i; /* this might be last fragment */ | |
398 | } | |
a9c6edcd | 399 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
400 | /* |
401 | * Depending on platform multi-block can deliver several *times* | |
402 | * better performance. Downside is that it has to allocate | |
8483a003 | 403 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
404 | * compromise is considered worthy. |
405 | */ | |
406 | if (type == SSL3_RT_APPLICATION_DATA && | |
407 | u_len >= 4 * (max_send_fragment = s->max_send_fragment) && | |
408 | s->compress == NULL && s->msg_callback == NULL && | |
409 | !SSL_USE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && | |
846ec07d | 410 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
411 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
412 | unsigned char aad[13]; | |
413 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
414 | int packlen; | |
415 | ||
416 | /* minimize address aliasing conflicts */ | |
417 | if ((max_send_fragment & 0xfff) == 0) | |
418 | max_send_fragment -= 512; | |
419 | ||
420 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
421 | ssl3_release_write_buffer(s); | |
422 | ||
423 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
424 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
425 | max_send_fragment, NULL); | |
426 | ||
427 | if (u_len >= 8 * max_send_fragment) | |
428 | packlen *= 8; | |
429 | else | |
430 | packlen *= 4; | |
431 | ||
58c27c20 | 432 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
918bb865 MC |
433 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); |
434 | return -1; | |
435 | } | |
0f113f3e | 436 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
437 | /* free jumbo buffer */ |
438 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
439 | return tot; |
440 | } | |
441 | ||
442 | n = (len - tot); | |
443 | for (;;) { | |
444 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
445 | /* free jumbo buffer */ |
446 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
447 | break; |
448 | } | |
449 | ||
450 | if (s->s3->alert_dispatch) { | |
451 | i = s->method->ssl_dispatch_alert(s); | |
452 | if (i <= 0) { | |
e2228d31 | 453 | s->rlayer.wnum = tot; |
0f113f3e MC |
454 | return i; |
455 | } | |
456 | } | |
457 | ||
458 | if (n >= 8 * max_send_fragment) | |
459 | nw = max_send_fragment * (mb_param.interleave = 8); | |
460 | else | |
461 | nw = max_send_fragment * (mb_param.interleave = 4); | |
462 | ||
de07f311 | 463 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
464 | aad[8] = type; |
465 | aad[9] = (unsigned char)(s->version >> 8); | |
466 | aad[10] = (unsigned char)(s->version); | |
467 | aad[11] = 0; | |
468 | aad[12] = 0; | |
469 | mb_param.out = NULL; | |
470 | mb_param.inp = aad; | |
471 | mb_param.len = nw; | |
472 | ||
473 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
474 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, | |
475 | sizeof(mb_param), &mb_param); | |
476 | ||
477 | if (packlen <= 0 || packlen > (int)wb->len) { /* never happens */ | |
58c27c20 MC |
478 | /* free jumbo buffer */ |
479 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
480 | break; |
481 | } | |
482 | ||
483 | mb_param.out = wb->buf; | |
484 | mb_param.inp = &buf[tot]; | |
485 | mb_param.len = nw; | |
486 | ||
487 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
488 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
489 | sizeof(mb_param), &mb_param) <= 0) | |
490 | return -1; | |
491 | ||
de07f311 MC |
492 | s->rlayer.write_sequence[7] += mb_param.interleave; |
493 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 494 | int j = 6; |
de07f311 | 495 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
496 | } |
497 | ||
498 | wb->offset = 0; | |
499 | wb->left = packlen; | |
500 | ||
f8caa3c8 MC |
501 | s->rlayer.wpend_tot = nw; |
502 | s->rlayer.wpend_buf = &buf[tot]; | |
503 | s->rlayer.wpend_type = type; | |
504 | s->rlayer.wpend_ret = nw; | |
0f113f3e MC |
505 | |
506 | i = ssl3_write_pending(s, type, &buf[tot], nw); | |
507 | if (i <= 0) { | |
1d2a18dc | 508 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
509 | /* free jumbo buffer */ |
510 | ssl3_release_write_buffer(s); | |
0f113f3e | 511 | } |
e2228d31 | 512 | s->rlayer.wnum = tot; |
0f113f3e MC |
513 | return i; |
514 | } | |
515 | if (i == (int)n) { | |
58c27c20 MC |
516 | /* free jumbo buffer */ |
517 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
518 | return tot + i; |
519 | } | |
520 | n -= i; | |
521 | tot += i; | |
522 | } | |
523 | } else | |
a9c6edcd | 524 | #endif |
0f113f3e MC |
525 | if (tot == len) { /* done? */ |
526 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
527 | ssl3_release_write_buffer(s); | |
528 | ||
529 | return tot; | |
530 | } | |
531 | ||
532 | n = (len - tot); | |
d102d9df MC |
533 | |
534 | split_send_fragment = s->split_send_fragment; | |
535 | /* | |
536 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 537 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
538 | * processing then we also only use 1 pipeline, or if we're not using |
539 | * explicit IVs | |
540 | */ | |
541 | maxpipes = s->max_pipelines; | |
542 | if (maxpipes > SSL_MAX_PIPELINES) { | |
543 | /* | |
544 | * We should have prevented this when we set max_pipelines so we | |
545 | * shouldn't get here | |
a230b26e | 546 | */ |
d102d9df MC |
547 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
548 | return -1; | |
549 | } | |
550 | if (maxpipes == 0 | |
a230b26e EK |
551 | || s->enc_write_ctx == NULL |
552 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
553 | & EVP_CIPH_FLAG_PIPELINE) | |
554 | || !SSL_USE_EXPLICIT_IV(s)) | |
d102d9df MC |
555 | maxpipes = 1; |
556 | if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment | |
a230b26e | 557 | || split_send_fragment == 0) { |
d102d9df MC |
558 | /* |
559 | * We should have prevented this when we set the split and max send | |
560 | * fragments so we shouldn't get here | |
a230b26e | 561 | */ |
d102d9df MC |
562 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
563 | return -1; | |
564 | } | |
565 | ||
0f113f3e | 566 | for (;;) { |
d102d9df MC |
567 | unsigned int pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
568 | unsigned int numpipes, j; | |
569 | ||
570 | if (n == 0) | |
571 | numpipes = 1; | |
0f113f3e | 572 | else |
d102d9df MC |
573 | numpipes = ((n - 1) / split_send_fragment) + 1; |
574 | if (numpipes > maxpipes) | |
575 | numpipes = maxpipes; | |
576 | ||
577 | if (n / numpipes >= s->max_send_fragment) { | |
578 | /* | |
579 | * We have enough data to completely fill all available | |
580 | * pipelines | |
581 | */ | |
582 | for (j = 0; j < numpipes; j++) { | |
583 | pipelens[j] = s->max_send_fragment; | |
584 | } | |
585 | } else { | |
586 | /* We can partially fill all available pipelines */ | |
587 | tmppipelen = n / numpipes; | |
588 | remain = n % numpipes; | |
589 | for (j = 0; j < numpipes; j++) { | |
590 | pipelens[j] = tmppipelen; | |
591 | if (j < remain) | |
592 | pipelens[j]++; | |
593 | } | |
594 | } | |
0f113f3e | 595 | |
d102d9df | 596 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0); |
0f113f3e MC |
597 | if (i <= 0) { |
598 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 599 | s->rlayer.wnum = tot; |
0f113f3e MC |
600 | return i; |
601 | } | |
602 | ||
603 | if ((i == (int)n) || | |
604 | (type == SSL3_RT_APPLICATION_DATA && | |
605 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
606 | /* | |
607 | * next chunk of data should get another prepended empty fragment | |
608 | * in ciphersuites with known-IV weakness: | |
609 | */ | |
610 | s->s3->empty_fragment_done = 0; | |
611 | ||
612 | if ((i == (int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && | |
613 | !SSL_IS_DTLS(s)) | |
614 | ssl3_release_write_buffer(s); | |
615 | ||
616 | return tot + i; | |
617 | } | |
618 | ||
619 | n -= i; | |
620 | tot += i; | |
621 | } | |
622 | } | |
d02b48c6 | 623 | |
c103c7e2 | 624 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
d102d9df MC |
625 | unsigned int *pipelens, unsigned int numpipes, |
626 | int create_empty_fragment) | |
0f113f3e | 627 | { |
d102d9df MC |
628 | unsigned char *outbuf[SSL_MAX_PIPELINES], *plen[SSL_MAX_PIPELINES]; |
629 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; | |
0f113f3e MC |
630 | int i, mac_size, clear = 0; |
631 | int prefix_len = 0; | |
632 | int eivlen; | |
f4bd5de5 | 633 | size_t align = 0; |
d102d9df | 634 | SSL3_BUFFER *wb; |
0f113f3e | 635 | SSL_SESSION *sess; |
d102d9df MC |
636 | unsigned int totlen = 0; |
637 | unsigned int j; | |
0f113f3e | 638 | |
d102d9df MC |
639 | for (j = 0; j < numpipes; j++) |
640 | totlen += pipelens[j]; | |
0f113f3e MC |
641 | /* |
642 | * first check if there is a SSL3_BUFFER still being written out. This | |
643 | * will happen with non blocking IO | |
644 | */ | |
d102d9df MC |
645 | if (RECORD_LAYER_write_pending(&s->rlayer)) |
646 | return (ssl3_write_pending(s, type, buf, totlen)); | |
0f113f3e MC |
647 | |
648 | /* If we have an alert to send, lets send it */ | |
649 | if (s->s3->alert_dispatch) { | |
650 | i = s->method->ssl_dispatch_alert(s); | |
651 | if (i <= 0) | |
652 | return (i); | |
653 | /* if it went, fall through and send more stuff */ | |
654 | } | |
655 | ||
d102d9df | 656 | if (s->rlayer.numwpipes < numpipes) |
58c27c20 | 657 | if (!ssl3_setup_write_buffer(s, numpipes, 0)) |
0f113f3e MC |
658 | return -1; |
659 | ||
d102d9df | 660 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
661 | return 0; |
662 | ||
0f113f3e MC |
663 | sess = s->session; |
664 | ||
665 | if ((sess == NULL) || | |
a230b26e | 666 | (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) { |
0f113f3e | 667 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
668 | mac_size = 0; |
669 | } else { | |
670 | mac_size = EVP_MD_CTX_size(s->write_hash); | |
671 | if (mac_size < 0) | |
672 | goto err; | |
673 | } | |
d02b48c6 | 674 | |
0f113f3e MC |
675 | /* |
676 | * 'create_empty_fragment' is true only when this function calls itself | |
677 | */ | |
678 | if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done) { | |
679 | /* | |
680 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
681 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
682 | */ | |
683 | ||
684 | if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { | |
685 | /* | |
686 | * recursive function call with 'create_empty_fragment' set; this | |
687 | * prepares and buffers the data for an empty fragment (these | |
688 | * 'prefix_len' bytes are sent out later together with the actual | |
689 | * payload) | |
690 | */ | |
d102d9df MC |
691 | unsigned int tmppipelen = 0; |
692 | ||
693 | prefix_len = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1); | |
0f113f3e MC |
694 | if (prefix_len <= 0) |
695 | goto err; | |
696 | ||
697 | if (prefix_len > | |
a230b26e | 698 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) { |
0f113f3e MC |
699 | /* insufficient space */ |
700 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
701 | goto err; | |
702 | } | |
703 | } | |
704 | ||
705 | s->s3->empty_fragment_done = 1; | |
706 | } | |
707 | ||
708 | if (create_empty_fragment) { | |
d102d9df | 709 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 710 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
711 | /* |
712 | * extra fragment would be couple of cipher blocks, which would be | |
713 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
8483a003 | 714 | * payload, then we can just pretend we simply have two headers. |
0f113f3e | 715 | */ |
f4bd5de5 | 716 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
753be41d | 717 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 718 | #endif |
d102d9df | 719 | outbuf[0] = SSL3_BUFFER_get_buf(wb) + align; |
747e1639 | 720 | SSL3_BUFFER_set_offset(wb, align); |
0f113f3e | 721 | } else if (prefix_len) { |
d102d9df MC |
722 | wb = &s->rlayer.wbuf[0]; |
723 | outbuf[0] = SSL3_BUFFER_get_buf(wb) + SSL3_BUFFER_get_offset(wb) | |
a230b26e | 724 | + prefix_len; |
0f113f3e | 725 | } else { |
a230b26e | 726 | for (j = 0; j < numpipes; j++) { |
d102d9df | 727 | wb = &s->rlayer.wbuf[j]; |
a4d64c7f | 728 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
d102d9df | 729 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
753be41d | 730 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 731 | #endif |
d102d9df MC |
732 | outbuf[j] = SSL3_BUFFER_get_buf(wb) + align; |
733 | SSL3_BUFFER_set_offset(wb, align); | |
734 | } | |
0f113f3e MC |
735 | } |
736 | ||
0f113f3e MC |
737 | /* Explicit IV length, block ciphers appropriate version flag */ |
738 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s)) { | |
739 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); | |
740 | if (mode == EVP_CIPH_CBC_MODE) { | |
741 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); | |
742 | if (eivlen <= 1) | |
743 | eivlen = 0; | |
744 | } | |
745 | /* Need explicit part of IV for GCM mode */ | |
746 | else if (mode == EVP_CIPH_GCM_MODE) | |
747 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
e75c5a79 DSH |
748 | else if (mode == EVP_CIPH_CCM_MODE) |
749 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
0f113f3e MC |
750 | else |
751 | eivlen = 0; | |
752 | } else | |
753 | eivlen = 0; | |
754 | ||
d102d9df MC |
755 | totlen = 0; |
756 | /* Clear our SSL3_RECORD structures */ | |
757 | memset(wr, 0, sizeof wr); | |
a230b26e | 758 | for (j = 0; j < numpipes; j++) { |
d102d9df MC |
759 | /* write the header */ |
760 | *(outbuf[j]++) = type & 0xff; | |
761 | SSL3_RECORD_set_type(&wr[j], type); | |
0f113f3e | 762 | |
d102d9df MC |
763 | *(outbuf[j]++) = (s->version >> 8); |
764 | /* | |
8483a003 | 765 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
766 | * and record version number > TLS 1.0 |
767 | */ | |
768 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
769 | && !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION) | |
770 | *(outbuf[j]++) = 0x1; | |
771 | else | |
772 | *(outbuf[j]++) = s->version & 0xff; | |
0f113f3e | 773 | |
d102d9df MC |
774 | /* field where we are to write out packet length */ |
775 | plen[j] = outbuf[j]; | |
776 | outbuf[j] += 2; | |
0f113f3e | 777 | |
d102d9df MC |
778 | /* lets setup the record stuff. */ |
779 | SSL3_RECORD_set_data(&wr[j], outbuf[j] + eivlen); | |
780 | SSL3_RECORD_set_length(&wr[j], (int)pipelens[j]); | |
781 | SSL3_RECORD_set_input(&wr[j], (unsigned char *)&buf[totlen]); | |
782 | totlen += pipelens[j]; | |
0f113f3e | 783 | |
d102d9df MC |
784 | /* |
785 | * we now 'read' from wr->input, wr->length bytes into wr->data | |
786 | */ | |
0f113f3e | 787 | |
d102d9df MC |
788 | /* first we compress */ |
789 | if (s->compress != NULL) { | |
790 | if (!ssl3_do_compress(s, &wr[j])) { | |
791 | SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); | |
792 | goto err; | |
793 | } | |
794 | } else { | |
795 | memcpy(wr[j].data, wr[j].input, wr[j].length); | |
796 | SSL3_RECORD_reset_input(&wr[j]); | |
797 | } | |
0f113f3e | 798 | |
0f113f3e | 799 | /* |
d102d9df MC |
800 | * we should still have the output to wr->data and the input from |
801 | * wr->input. Length should be wr->length. wr->data still points in the | |
802 | * wb->buf | |
0f113f3e | 803 | */ |
0f113f3e | 804 | |
d102d9df MC |
805 | if (!SSL_USE_ETM(s) && mac_size != 0) { |
806 | if (s->method->ssl3_enc->mac(s, &wr[j], | |
a230b26e EK |
807 | &(outbuf[j][wr[j].length + eivlen]), |
808 | 1) < 0) | |
d102d9df MC |
809 | goto err; |
810 | SSL3_RECORD_add_length(&wr[j], mac_size); | |
811 | } | |
0f113f3e | 812 | |
d102d9df MC |
813 | SSL3_RECORD_set_data(&wr[j], outbuf[j]); |
814 | SSL3_RECORD_reset_input(&wr[j]); | |
815 | ||
816 | if (eivlen) { | |
817 | /* | |
818 | * if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err; | |
819 | */ | |
820 | SSL3_RECORD_add_length(&wr[j], eivlen); | |
821 | } | |
0f113f3e MC |
822 | } |
823 | ||
d102d9df MC |
824 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) |
825 | goto err; | |
0f113f3e | 826 | |
a230b26e | 827 | for (j = 0; j < numpipes; j++) { |
d102d9df MC |
828 | if (SSL_USE_ETM(s) && mac_size != 0) { |
829 | if (s->method->ssl3_enc->mac(s, &wr[j], | |
830 | outbuf[j] + wr[j].length, 1) < 0) | |
831 | goto err; | |
832 | SSL3_RECORD_add_length(&wr[j], mac_size); | |
833 | } | |
0f113f3e | 834 | |
d102d9df MC |
835 | /* record length after mac and block padding */ |
836 | s2n(SSL3_RECORD_get_length(&wr[j]), plen[j]); | |
837 | ||
838 | if (s->msg_callback) | |
839 | s->msg_callback(1, 0, SSL3_RT_HEADER, plen[j] - 5, 5, s, | |
840 | s->msg_callback_arg); | |
0f113f3e | 841 | |
0f113f3e | 842 | /* |
d102d9df MC |
843 | * we should now have wr->data pointing to the encrypted data, which is |
844 | * wr->length long | |
0f113f3e | 845 | */ |
a230b26e EK |
846 | SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for |
847 | * debugging */ | |
d102d9df MC |
848 | SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); |
849 | ||
850 | if (create_empty_fragment) { | |
851 | /* | |
852 | * we are in a recursive call; just return the length, don't write | |
853 | * out anything here | |
854 | */ | |
855 | if (j > 0) { | |
856 | /* We should never be pipelining an empty fragment!! */ | |
857 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
858 | goto err; | |
859 | } | |
860 | return SSL3_RECORD_get_length(wr); | |
861 | } | |
862 | ||
863 | /* now let's set up wb */ | |
864 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
a230b26e | 865 | prefix_len + SSL3_RECORD_get_length(&wr[j])); |
0f113f3e MC |
866 | } |
867 | ||
0f113f3e MC |
868 | /* |
869 | * memorize arguments so that ssl3_write_pending can detect bad write | |
870 | * retries later | |
871 | */ | |
d102d9df | 872 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
873 | s->rlayer.wpend_buf = buf; |
874 | s->rlayer.wpend_type = type; | |
d102d9df | 875 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
876 | |
877 | /* we now just need to write the buffer */ | |
d102d9df | 878 | return ssl3_write_pending(s, type, buf, totlen); |
0f113f3e MC |
879 | err: |
880 | return -1; | |
881 | } | |
d02b48c6 | 882 | |
4880672a MC |
883 | /* if s->s3->wbuf.left != 0, we need to call this |
884 | * | |
885 | * Return values are as per SSL_read(), i.e. | |
886 | * >0 The number of read bytes | |
887 | * 0 Failure (not retryable) | |
888 | * <0 Failure (may be retryable) | |
889 | */ | |
36d16f8e | 890 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, |
0f113f3e MC |
891 | unsigned int len) |
892 | { | |
893 | int i; | |
d102d9df MC |
894 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
895 | unsigned int currbuf = 0; | |
d02b48c6 | 896 | |
58964a49 | 897 | /* XXXX */ |
f8caa3c8 MC |
898 | if ((s->rlayer.wpend_tot > (int)len) |
899 | || ((s->rlayer.wpend_buf != buf) && | |
0f113f3e | 900 | !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) |
f8caa3c8 | 901 | || (s->rlayer.wpend_type != type)) { |
0f113f3e MC |
902 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
903 | return (-1); | |
904 | } | |
905 | ||
906 | for (;;) { | |
d102d9df MC |
907 | /* Loop until we find a buffer we haven't written out yet */ |
908 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 909 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
910 | currbuf++; |
911 | continue; | |
912 | } | |
0f113f3e MC |
913 | clear_sys_error(); |
914 | if (s->wbio != NULL) { | |
915 | s->rwstate = SSL_WRITING; | |
a230b26e EK |
916 | i = BIO_write(s->wbio, (char *) |
917 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
918 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
919 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
0f113f3e MC |
920 | } else { |
921 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); | |
922 | i = -1; | |
923 | } | |
d102d9df MC |
924 | if (i == SSL3_BUFFER_get_left(&wb[currbuf])) { |
925 | SSL3_BUFFER_set_left(&wb[currbuf], 0); | |
926 | SSL3_BUFFER_add_offset(&wb[currbuf], i); | |
927 | if (currbuf + 1 < s->rlayer.numwpipes) | |
928 | continue; | |
0f113f3e | 929 | s->rwstate = SSL_NOTHING; |
f8caa3c8 | 930 | return (s->rlayer.wpend_ret); |
0f113f3e | 931 | } else if (i <= 0) { |
5e8b24db | 932 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
933 | /* |
934 | * For DTLS, just drop it. That's kind of the whole point in | |
935 | * using a datagram service | |
936 | */ | |
d102d9df | 937 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 938 | } |
4880672a | 939 | return -1; |
0f113f3e | 940 | } |
d102d9df MC |
941 | SSL3_BUFFER_add_offset(&wb[currbuf], i); |
942 | SSL3_BUFFER_add_left(&wb[currbuf], -i); | |
0f113f3e MC |
943 | } |
944 | } | |
d02b48c6 | 945 | |
1d97c843 TH |
946 | /*- |
947 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
948 | * 'type' is one of the following: |
949 | * | |
950 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
951 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
952 | * - 0 (during a shutdown, no data has to be returned) | |
953 | * | |
954 | * If we don't have stored data to work from, read a SSL/TLS record first | |
955 | * (possibly multiple records if we still don't have anything to return). | |
956 | * | |
957 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
958 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
959 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
960 | * argument is non NULL. | |
b35e9050 BM |
961 | * Also if record payloads contain fragments too small to process, we store |
962 | * them until there is enough for the respective protocol (the record protocol | |
963 | * may use arbitrary fragmentation and even interleaving): | |
964 | * Change cipher spec protocol | |
965 | * just 1 byte needed, no need for keeping anything stored | |
966 | * Alert protocol | |
967 | * 2 bytes needed (AlertLevel, AlertDescription) | |
968 | * Handshake protocol | |
969 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
970 | * to detect unexpected Client Hello and Hello Request messages | |
971 | * here, anything else is handled by higher layers | |
972 | * Application data protocol | |
973 | * none of our business | |
974 | */ | |
657da85e MC |
975 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
976 | int len, int peek) | |
0f113f3e MC |
977 | { |
978 | int al, i, j, ret; | |
94777c9c | 979 | unsigned int n, curr_rec, num_recs, read_bytes; |
0f113f3e | 980 | SSL3_RECORD *rr; |
94777c9c | 981 | SSL3_BUFFER *rbuf; |
0f113f3e MC |
982 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
983 | ||
94777c9c MC |
984 | rbuf = &s->rlayer.rbuf; |
985 | ||
986 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 987 | /* Not initialized yet */ |
0f113f3e MC |
988 | if (!ssl3_setup_read_buffer(s)) |
989 | return (-1); | |
28d59af8 | 990 | } |
0f113f3e MC |
991 | |
992 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
993 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
994 | && (type != | |
995 | SSL3_RT_APPLICATION_DATA))) { | |
996 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
997 | return -1; | |
998 | } | |
999 | ||
4aa7389e | 1000 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1001 | /* (partially) satisfy request from storage */ |
1002 | { | |
4aa7389e | 1003 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1004 | unsigned char *dst = buf; |
1005 | unsigned int k; | |
1006 | ||
1007 | /* peek == 0 */ | |
1008 | n = 0; | |
4aa7389e | 1009 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1010 | *dst++ = *src++; |
1011 | len--; | |
4aa7389e | 1012 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1013 | n++; |
1014 | } | |
1015 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1016 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1017 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1018 | |
1019 | if (recvd_type != NULL) | |
1020 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1021 | ||
0f113f3e MC |
1022 | return n; |
1023 | } | |
1024 | ||
1025 | /* | |
4aa7389e | 1026 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1027 | */ |
1028 | ||
024f543c | 1029 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1030 | /* type == SSL3_RT_APPLICATION_DATA */ |
1031 | i = s->handshake_func(s); | |
1032 | if (i < 0) | |
1033 | return (i); | |
1034 | if (i == 0) { | |
1035 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
1036 | return (-1); | |
1037 | } | |
1038 | } | |
1039 | start: | |
1040 | s->rwstate = SSL_NOTHING; | |
1041 | ||
50e735f9 | 1042 | /*- |
94777c9c MC |
1043 | * For each record 'i' up to |num_recs] |
1044 | * rr[i].type - is the type of record | |
1045 | * rr[i].data, - data | |
1046 | * rr[i].off, - offset into 'data' for next read | |
1047 | * rr[i].length, - number of bytes. | |
50e735f9 | 1048 | */ |
94777c9c MC |
1049 | rr = s->rlayer.rrec; |
1050 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1051 | ||
1052 | do { | |
1053 | /* get new records if necessary */ | |
1054 | if (num_recs == 0) { | |
1055 | ret = ssl3_get_record(s); | |
1056 | if (ret <= 0) | |
1057 | return (ret); | |
1058 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1059 | if (num_recs == 0) { | |
1060 | /* Shouldn't happen */ | |
1061 | al = SSL_AD_INTERNAL_ERROR; | |
1062 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1063 | goto f_err; | |
1064 | } | |
1065 | } | |
255cfeac | 1066 | /* Skip over any records we have already read */ |
94777c9c | 1067 | for (curr_rec = 0; |
255cfeac | 1068 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1069 | curr_rec++) ; |
94777c9c MC |
1070 | if (curr_rec == num_recs) { |
1071 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1072 | num_recs = 0; | |
1073 | curr_rec = 0; | |
1074 | } | |
1075 | } while (num_recs == 0); | |
1076 | rr = &rr[curr_rec]; | |
0f113f3e | 1077 | |
af58be76 MC |
1078 | /* |
1079 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1080 | * record that isn't an alert. | |
1081 | */ | |
1082 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1083 | && SSL3_RECORD_get_length(rr) != 0) | |
1084 | s->rlayer.alert_count = 0; | |
1085 | ||
0f113f3e MC |
1086 | /* we now have a packet which can be read and processed */ |
1087 | ||
1088 | if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, | |
1089 | * reset by ssl3_get_finished */ | |
747e1639 | 1090 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
1091 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1092 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1093 | goto f_err; | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * If the other end has shut down, throw anything we read away (even in | |
1098 | * 'peek' mode) | |
1099 | */ | |
1100 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1101 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1102 | s->rwstate = SSL_NOTHING; |
1103 | return (0); | |
1104 | } | |
1105 | ||
657da85e | 1106 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e EK |
1107 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1108 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) { | |
657da85e MC |
1109 | /* |
1110 | * SSL3_RT_APPLICATION_DATA or | |
1111 | * SSL3_RT_HANDSHAKE or | |
1112 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1113 | */ | |
0f113f3e MC |
1114 | /* |
1115 | * make sure that we are not getting application data when we are | |
1116 | * doing a handshake for the first time | |
1117 | */ | |
1118 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1119 | (s->enc_read_ctx == NULL)) { | |
1120 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1121 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE); | |
1122 | goto f_err; | |
1123 | } | |
1124 | ||
657da85e | 1125 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1126 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1127 | && s->rlayer.handshake_fragment_len > 0) { | |
657da85e MC |
1128 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1129 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1130 | goto f_err; | |
1131 | } | |
1132 | ||
1133 | if (recvd_type != NULL) | |
1134 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1135 | ||
0f113f3e MC |
1136 | if (len <= 0) |
1137 | return (len); | |
1138 | ||
94777c9c MC |
1139 | read_bytes = 0; |
1140 | do { | |
1141 | if ((unsigned int)len - read_bytes > SSL3_RECORD_get_length(rr)) | |
1142 | n = SSL3_RECORD_get_length(rr); | |
1143 | else | |
1144 | n = (unsigned int)len - read_bytes; | |
1145 | ||
1146 | memcpy(buf, &(rr->data[rr->off]), n); | |
1147 | buf += n; | |
b8d24395 MC |
1148 | if (peek) { |
1149 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1150 | if (SSL3_RECORD_get_length(rr) == 0) | |
1151 | SSL3_RECORD_set_read(rr); | |
1152 | } else { | |
753be41d | 1153 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1154 | SSL3_RECORD_add_off(rr, n); |
1155 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1156 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1157 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1158 | SSL3_RECORD_set_read(rr); |
94777c9c | 1159 | } |
0f113f3e | 1160 | } |
94777c9c MC |
1161 | if (SSL3_RECORD_get_length(rr) == 0 |
1162 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1163 | curr_rec++; | |
1164 | rr++; | |
1165 | } | |
1166 | read_bytes += n; | |
1167 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs | |
1168 | && read_bytes < (unsigned int)len); | |
255cfeac MC |
1169 | if (read_bytes == 0) { |
1170 | /* We must have read empty records. Get more data */ | |
1171 | goto start; | |
1172 | } | |
94777c9c | 1173 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1174 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1175 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c MC |
1176 | ssl3_release_read_buffer(s); |
1177 | return read_bytes; | |
0f113f3e MC |
1178 | } |
1179 | ||
1180 | /* | |
1181 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1182 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1183 | * were actually expecting a CCS). | |
0f113f3e MC |
1184 | */ |
1185 | ||
32ec4153 MC |
1186 | /* |
1187 | * Lets just double check that we've not got an SSLv2 record | |
1188 | */ | |
1189 | if (rr->rec_version == SSL2_VERSION) { | |
1190 | /* | |
1191 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1192 | * record back if this is the first packet and we are looking for an | |
1193 | * initial ClientHello. Therefore |type| should always be equal to | |
1194 | * |rr->type|. If not then something has gone horribly wrong | |
1195 | */ | |
1196 | al = SSL_AD_INTERNAL_ERROR; | |
1197 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1198 | goto f_err; | |
1199 | } | |
1200 | ||
e8aa8b6c | 1201 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1202 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1203 | /* |
1204 | * If we've got this far and still haven't decided on what version | |
1205 | * we're using then this must be a client side alert we're dealing with | |
1206 | * (we don't allow heartbeats yet). We shouldn't be receiving anything | |
1207 | * other than a ClientHello if we are a server. | |
1208 | */ | |
1209 | s->version = rr->rec_version; | |
1210 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1211 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1212 | goto f_err; | |
1213 | } | |
1214 | ||
0f113f3e MC |
1215 | /* |
1216 | * In case of record types for which we have 'fragment' storage, fill | |
1217 | * that so that we can process the data at a fixed place. | |
1218 | */ | |
1219 | { | |
1220 | unsigned int dest_maxlen = 0; | |
1221 | unsigned char *dest = NULL; | |
1222 | unsigned int *dest_len = NULL; | |
1223 | ||
747e1639 | 1224 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
4aa7389e MC |
1225 | dest_maxlen = sizeof s->rlayer.handshake_fragment; |
1226 | dest = s->rlayer.handshake_fragment; | |
1227 | dest_len = &s->rlayer.handshake_fragment_len; | |
747e1639 | 1228 | } else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
4aa7389e MC |
1229 | dest_maxlen = sizeof s->rlayer.alert_fragment; |
1230 | dest = s->rlayer.alert_fragment; | |
1231 | dest_len = &s->rlayer.alert_fragment_len; | |
0f113f3e | 1232 | } |
b35e9050 | 1233 | |
0f113f3e MC |
1234 | if (dest_maxlen > 0) { |
1235 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
747e1639 MC |
1236 | if (SSL3_RECORD_get_length(rr) < n) |
1237 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
0f113f3e MC |
1238 | |
1239 | /* now move 'n' bytes: */ | |
1240 | while (n-- > 0) { | |
747e1639 MC |
1241 | dest[(*dest_len)++] = |
1242 | SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]; | |
1243 | SSL3_RECORD_add_off(rr, 1); | |
1244 | SSL3_RECORD_add_length(rr, -1); | |
0f113f3e MC |
1245 | } |
1246 | ||
63916e9a MC |
1247 | if (*dest_len < dest_maxlen) { |
1248 | SSL3_RECORD_set_read(rr); | |
0f113f3e | 1249 | goto start; /* fragment was too small */ |
63916e9a | 1250 | } |
0f113f3e MC |
1251 | } |
1252 | } | |
1253 | ||
50e735f9 | 1254 | /*- |
4aa7389e MC |
1255 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
1256 | * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT. | |
50e735f9 MC |
1257 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1258 | */ | |
0f113f3e MC |
1259 | |
1260 | /* If we are a client, check for an incoming 'Hello Request': */ | |
1261 | if ((!s->server) && | |
4aa7389e MC |
1262 | (s->rlayer.handshake_fragment_len >= 4) && |
1263 | (s->rlayer.handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) && | |
0f113f3e | 1264 | (s->session != NULL) && (s->session->cipher != NULL)) { |
4aa7389e | 1265 | s->rlayer.handshake_fragment_len = 0; |
0f113f3e | 1266 | |
4aa7389e MC |
1267 | if ((s->rlayer.handshake_fragment[1] != 0) || |
1268 | (s->rlayer.handshake_fragment[2] != 0) || | |
1269 | (s->rlayer.handshake_fragment[3] != 0)) { | |
0f113f3e MC |
1270 | al = SSL_AD_DECODE_ERROR; |
1271 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_BAD_HELLO_REQUEST); | |
1272 | goto f_err; | |
1273 | } | |
1274 | ||
1275 | if (s->msg_callback) | |
1276 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, | |
4aa7389e | 1277 | s->rlayer.handshake_fragment, 4, s, |
0f113f3e MC |
1278 | s->msg_callback_arg); |
1279 | ||
1280 | if (SSL_is_init_finished(s) && | |
1281 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && | |
1282 | !s->s3->renegotiate) { | |
1283 | ssl3_renegotiate(s); | |
1284 | if (ssl3_renegotiate_check(s)) { | |
1285 | i = s->handshake_func(s); | |
1286 | if (i < 0) | |
1287 | return (i); | |
1288 | if (i == 0) { | |
a230b26e | 1289 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); |
0f113f3e MC |
1290 | return (-1); |
1291 | } | |
1292 | ||
1293 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1294 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1295 | /* no read-ahead left? */ |
0f113f3e MC |
1296 | BIO *bio; |
1297 | /* | |
1298 | * In the case where we try to read application data, | |
1299 | * but we trigger an SSL handshake, we return -1 with | |
1300 | * the retry option set. Otherwise renegotiation may | |
1301 | * cause nasty problems in the blocking world | |
1302 | */ | |
1303 | s->rwstate = SSL_READING; | |
1304 | bio = SSL_get_rbio(s); | |
1305 | BIO_clear_retry_flags(bio); | |
1306 | BIO_set_retry_read(bio); | |
1307 | return (-1); | |
1308 | } | |
1309 | } | |
1310 | } | |
1311 | } | |
1312 | /* | |
1313 | * we either finished a handshake or ignored the request, now try | |
1314 | * again to obtain the (application) data we were asked for | |
1315 | */ | |
1316 | goto start; | |
1317 | } | |
1318 | /* | |
1319 | * If we are a server and get a client hello when renegotiation isn't | |
1320 | * allowed send back a no renegotiation alert and carry on. WARNING: | |
1321 | * experimental code, needs reviewing (steve) | |
1322 | */ | |
1323 | if (s->server && | |
1324 | SSL_is_init_finished(s) && | |
1325 | !s->s3->send_connection_binding && | |
1326 | (s->version > SSL3_VERSION) && | |
4aa7389e MC |
1327 | (s->rlayer.handshake_fragment_len >= 4) && |
1328 | (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && | |
0f113f3e MC |
1329 | (s->session != NULL) && (s->session->cipher != NULL) && |
1330 | !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { | |
747e1639 | 1331 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1332 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
1333 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); |
1334 | goto start; | |
1335 | } | |
4aa7389e MC |
1336 | if (s->rlayer.alert_fragment_len >= 2) { |
1337 | int alert_level = s->rlayer.alert_fragment[0]; | |
1338 | int alert_descr = s->rlayer.alert_fragment[1]; | |
0f113f3e | 1339 | |
4aa7389e | 1340 | s->rlayer.alert_fragment_len = 0; |
0f113f3e MC |
1341 | |
1342 | if (s->msg_callback) | |
1343 | s->msg_callback(0, s->version, SSL3_RT_ALERT, | |
4aa7389e MC |
1344 | s->rlayer.alert_fragment, 2, s, |
1345 | s->msg_callback_arg); | |
0f113f3e MC |
1346 | |
1347 | if (s->info_callback != NULL) | |
1348 | cb = s->info_callback; | |
1349 | else if (s->ctx->info_callback != NULL) | |
1350 | cb = s->ctx->info_callback; | |
1351 | ||
1352 | if (cb != NULL) { | |
1353 | j = (alert_level << 8) | alert_descr; | |
1354 | cb(s, SSL_CB_READ_ALERT, j); | |
1355 | } | |
1356 | ||
fd865cad | 1357 | if (alert_level == SSL3_AL_WARNING) { |
0f113f3e | 1358 | s->s3->warn_alert = alert_descr; |
63916e9a | 1359 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1360 | |
1361 | s->rlayer.alert_count++; | |
1362 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
1363 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1364 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); | |
1365 | goto f_err; | |
1366 | } | |
1367 | ||
0f113f3e MC |
1368 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { |
1369 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1370 | return (0); | |
1371 | } | |
1372 | /* | |
1373 | * This is a warning but we receive it if we requested | |
1374 | * renegotiation and the peer denied it. Terminate with a fatal | |
8483a003 | 1375 | * alert because if application tried to renegotiate it |
0f113f3e MC |
1376 | * presumably had a good reason and expects it to succeed. In |
1377 | * future we might have a renegotiation where we don't care if | |
1378 | * the peer refused it where we carry on. | |
1379 | */ | |
1380 | else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { | |
1381 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1382 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); | |
1383 | goto f_err; | |
1384 | } | |
edc032b5 | 1385 | #ifdef SSL_AD_MISSING_SRP_USERNAME |
3c0c68ae MC |
1386 | else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME) |
1387 | return (0); | |
edc032b5 | 1388 | #endif |
fd865cad | 1389 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
1390 | char tmp[16]; |
1391 | ||
1392 | s->rwstate = SSL_NOTHING; | |
1393 | s->s3->fatal_alert = alert_descr; | |
1394 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); | |
1395 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
1396 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
1397 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1398 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1399 | SSL_CTX_remove_session(s->session_ctx, s->session); |
0f113f3e MC |
1400 | return (0); |
1401 | } else { | |
1402 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1403 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1404 | goto f_err; | |
1405 | } | |
1406 | ||
1407 | goto start; | |
1408 | } | |
1409 | ||
1410 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
1411 | * shutdown */ | |
1412 | s->rwstate = SSL_NOTHING; | |
747e1639 | 1413 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1414 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
1415 | return (0); |
1416 | } | |
1417 | ||
747e1639 | 1418 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
657da85e MC |
1419 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1420 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1421 | goto f_err; | |
0f113f3e MC |
1422 | } |
1423 | ||
1424 | /* | |
1425 | * Unexpected handshake message (Client Hello, or protocol violation) | |
1426 | */ | |
024f543c | 1427 | if ((s->rlayer.handshake_fragment_len >= 4) |
a230b26e | 1428 | && !ossl_statem_get_in_handshake(s)) { |
49ae7423 | 1429 | if (SSL_is_init_finished(s) && |
0f113f3e | 1430 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) { |
fe3a3291 | 1431 | ossl_statem_set_in_init(s, 1); |
0f113f3e MC |
1432 | s->renegotiate = 1; |
1433 | s->new_session = 1; | |
1434 | } | |
1435 | i = s->handshake_func(s); | |
1436 | if (i < 0) | |
1437 | return (i); | |
1438 | if (i == 0) { | |
1439 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
1440 | return (-1); | |
1441 | } | |
1442 | ||
1443 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1444 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1445 | /* no read-ahead left? */ |
0f113f3e MC |
1446 | BIO *bio; |
1447 | /* | |
1448 | * In the case where we try to read application data, but we | |
1449 | * trigger an SSL handshake, we return -1 with the retry | |
1450 | * option set. Otherwise renegotiation may cause nasty | |
1451 | * problems in the blocking world | |
1452 | */ | |
1453 | s->rwstate = SSL_READING; | |
1454 | bio = SSL_get_rbio(s); | |
1455 | BIO_clear_retry_flags(bio); | |
1456 | BIO_set_retry_read(bio); | |
1457 | return (-1); | |
1458 | } | |
1459 | } | |
1460 | goto start; | |
1461 | } | |
1462 | ||
747e1639 | 1463 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1464 | default: |
0f113f3e MC |
1465 | /* |
1466 | * TLS up to v1.1 just ignores unknown message types: TLS v1.2 give | |
1467 | * an unexpected message alert. | |
1468 | */ | |
1469 | if (s->version >= TLS1_VERSION && s->version <= TLS1_1_VERSION) { | |
747e1639 | 1470 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1471 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
1472 | goto start; |
1473 | } | |
0f113f3e MC |
1474 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1475 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1476 | goto f_err; | |
1477 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
1478 | case SSL3_RT_ALERT: | |
1479 | case SSL3_RT_HANDSHAKE: | |
1480 | /* | |
1481 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1482 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1483 | * that should not happen when type != rr->type | |
0f113f3e MC |
1484 | */ |
1485 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1486 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1487 | goto f_err; | |
1488 | case SSL3_RT_APPLICATION_DATA: | |
1489 | /* | |
1490 | * At this point, we were expecting handshake data, but have | |
1491 | * application data. If the library was running inside ssl3_read() | |
1492 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1493 | * application data at this point (session renegotiation not yet | |
1494 | * started), we will indulge it. | |
1495 | */ | |
fe3a3291 | 1496 | if (ossl_statem_app_data_allowed(s)) { |
0f113f3e MC |
1497 | s->s3->in_read_app_data = 2; |
1498 | return (-1); | |
1499 | } else { | |
1500 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1501 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1502 | goto f_err; | |
1503 | } | |
1504 | } | |
1505 | /* not reached */ | |
1506 | ||
1507 | f_err: | |
1508 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0f113f3e MC |
1509 | return (-1); |
1510 | } | |
d02b48c6 | 1511 | |
14daae5a MC |
1512 | void ssl3_record_sequence_update(unsigned char *seq) |
1513 | { | |
1514 | int i; | |
1515 | ||
1516 | for (i = 7; i >= 0; i--) { | |
1517 | ++seq[i]; | |
1518 | if (seq[i] != 0) | |
1519 | break; | |
1520 | } | |
1521 | } | |
1522 | ||
d45ba43d MC |
1523 | /* |
1524 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1525 | * format and false otherwise. | |
1526 | */ | |
32ec4153 MC |
1527 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1528 | { | |
94777c9c | 1529 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1530 | } |
0f113f3e | 1531 | |
d45ba43d MC |
1532 | /* |
1533 | * Returns the length in bytes of the current rrec | |
1534 | */ | |
b821df5f | 1535 | unsigned int RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1536 | { |
94777c9c | 1537 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1538 | } |