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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
c51ae173 | 57 | /* ==================================================================== |
82b0bf0b | 58 | * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. |
c51ae173 BM |
59 | * |
60 | * Redistribution and use in source and binary forms, with or without | |
61 | * modification, are permitted provided that the following conditions | |
62 | * are met: | |
63 | * | |
64 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 65 | * notice, this list of conditions and the following disclaimer. |
c51ae173 BM |
66 | * |
67 | * 2. Redistributions in binary form must reproduce the above copyright | |
68 | * notice, this list of conditions and the following disclaimer in | |
69 | * the documentation and/or other materials provided with the | |
70 | * distribution. | |
71 | * | |
72 | * 3. All advertising materials mentioning features or use of this | |
73 | * software must display the following acknowledgment: | |
74 | * "This product includes software developed by the OpenSSL Project | |
75 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
76 | * | |
77 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
78 | * endorse or promote products derived from this software without | |
79 | * prior written permission. For written permission, please contact | |
80 | * openssl-core@openssl.org. | |
81 | * | |
82 | * 5. Products derived from this software may not be called "OpenSSL" | |
83 | * nor may "OpenSSL" appear in their names without prior written | |
84 | * permission of the OpenSSL Project. | |
85 | * | |
86 | * 6. Redistributions of any form whatsoever must retain the following | |
87 | * acknowledgment: | |
88 | * "This product includes software developed by the OpenSSL Project | |
89 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
90 | * | |
91 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
92 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
93 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
94 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
95 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
96 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
97 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
98 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
99 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
100 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
101 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
102 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
103 | * ==================================================================== | |
104 | * | |
105 | * This product includes cryptographic software written by Eric Young | |
106 | * (eay@cryptsoft.com). This product includes software written by Tim | |
107 | * Hudson (tjh@cryptsoft.com). | |
108 | * | |
109 | */ | |
d02b48c6 RE |
110 | |
111 | #include <stdio.h> | |
339da43d | 112 | #include <limits.h> |
d02b48c6 RE |
113 | #include <errno.h> |
114 | #define USE_SOCKETS | |
999005e4 | 115 | #include "../ssl_locl.h" |
ec577822 BM |
116 | #include <openssl/evp.h> |
117 | #include <openssl/buffer.h> | |
637f374a | 118 | #include <openssl/rand.h> |
c99c4c11 | 119 | #include "record_locl.h" |
d02b48c6 | 120 | |
78038e09 AP |
121 | #ifndef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
122 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
123 | #endif | |
124 | ||
0f113f3e MC |
125 | #if defined(OPENSSL_SMALL_FOOTPRINT) || \ |
126 | !( defined(AES_ASM) && ( \ | |
127 | defined(__x86_64) || defined(__x86_64__) || \ | |
128 | defined(_M_AMD64) || defined(_M_X64) || \ | |
129 | defined(__INTEL__) ) \ | |
130 | ) | |
a9c6edcd AP |
131 | # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
132 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
133 | #endif | |
134 | ||
c036e210 MC |
135 | void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s) |
136 | { | |
137 | rl->s = s; | |
94777c9c MC |
138 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
139 | SSL3_RECORD_clear(&rl->wrec, 1); | |
c036e210 MC |
140 | } |
141 | ||
af9752e5 MC |
142 | void RECORD_LAYER_clear(RECORD_LAYER *rl) |
143 | { | |
d102d9df MC |
144 | unsigned int pipes; |
145 | ||
6b41b3f5 | 146 | rl->rstate = SSL_ST_READ_HEADER; |
af9752e5 | 147 | |
6b41b3f5 | 148 | /* Do I need to clear read_ahead? As far as I can tell read_ahead did not |
af9752e5 MC |
149 | * previously get reset by SSL_clear...so I'll keep it that way..but is |
150 | * that right? | |
151 | */ | |
6b41b3f5 MC |
152 | |
153 | rl->packet = NULL; | |
154 | rl->packet_length = 0; | |
155 | rl->wnum = 0; | |
156 | memset(rl->alert_fragment, 0, sizeof(rl->alert_fragment)); | |
157 | rl->alert_fragment_len = 0; | |
158 | memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); | |
159 | rl->handshake_fragment_len = 0; | |
160 | rl->wpend_tot = 0; | |
161 | rl->wpend_type = 0; | |
162 | rl->wpend_ret = 0; | |
163 | rl->wpend_buf = NULL; | |
164 | ||
165 | SSL3_BUFFER_clear(&rl->rbuf); | |
d102d9df MC |
166 | for(pipes = 0; pipes < rl->numwpipes; pipes++) |
167 | SSL3_BUFFER_clear(&rl->wbuf[pipes]); | |
168 | rl->numwpipes = 0; | |
94777c9c MC |
169 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
170 | SSL3_RECORD_clear(&rl->wrec, 1); | |
6b41b3f5 | 171 | |
95cdad63 MC |
172 | RECORD_LAYER_reset_read_sequence(rl); |
173 | RECORD_LAYER_reset_write_sequence(rl); | |
5fb6f80c | 174 | |
6b41b3f5 | 175 | if (rl->d) |
5fb6f80c | 176 | DTLS_RECORD_LAYER_clear(rl); |
af9752e5 MC |
177 | } |
178 | ||
f161995e MC |
179 | void RECORD_LAYER_release(RECORD_LAYER *rl) |
180 | { | |
181 | if (SSL3_BUFFER_is_initialised(&rl->rbuf)) | |
182 | ssl3_release_read_buffer(rl->s); | |
d102d9df | 183 | if (rl->numwpipes > 0) |
f161995e | 184 | ssl3_release_write_buffer(rl->s); |
94777c9c MC |
185 | /* TODO: Check why there is no release of wrec here?? */ |
186 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); | |
f161995e MC |
187 | } |
188 | ||
189 | int RECORD_LAYER_read_pending(RECORD_LAYER *rl) | |
190 | { | |
191 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; | |
192 | } | |
193 | ||
194 | int RECORD_LAYER_write_pending(RECORD_LAYER *rl) | |
195 | { | |
d102d9df MC |
196 | return (rl->numwpipes > 0) |
197 | && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes-1]) != 0; | |
f161995e MC |
198 | } |
199 | ||
bbcd6d7f MC |
200 | int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len) |
201 | { | |
7a7048af | 202 | rl->packet_length = len; |
61986d32 | 203 | if (len != 0) { |
295c3f41 | 204 | rl->rstate = SSL_ST_READ_HEADER; |
bbcd6d7f MC |
205 | if (!SSL3_BUFFER_is_initialised(&rl->rbuf)) |
206 | if (!ssl3_setup_read_buffer(rl->s)) | |
207 | return 0; | |
208 | } | |
209 | ||
7a7048af | 210 | rl->packet = SSL3_BUFFER_get_buf(&rl->rbuf); |
bbcd6d7f MC |
211 | SSL3_BUFFER_set_data(&rl->rbuf, buf, len); |
212 | ||
213 | return 1; | |
214 | } | |
215 | ||
de07f311 MC |
216 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
217 | { | |
95cdad63 | 218 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
219 | } |
220 | ||
221 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
222 | { | |
95cdad63 | 223 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
224 | } |
225 | ||
d5a25ae0 MC |
226 | int ssl3_pending(const SSL *s) |
227 | { | |
94777c9c MC |
228 | unsigned int i; |
229 | int num = 0; | |
230 | ||
295c3f41 | 231 | if (s->rlayer.rstate == SSL_ST_READ_BODY) |
d5a25ae0 MC |
232 | return 0; |
233 | ||
94777c9c MC |
234 | for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { |
235 | if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) | |
236 | != SSL3_RT_APPLICATION_DATA) | |
237 | return 0; | |
238 | num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); | |
239 | } | |
240 | ||
241 | return num; | |
d5a25ae0 MC |
242 | } |
243 | ||
295c3f41 MC |
244 | const char *SSL_rstate_string_long(const SSL *s) |
245 | { | |
246 | const char *str; | |
247 | ||
248 | switch (s->rlayer.rstate) { | |
249 | case SSL_ST_READ_HEADER: | |
250 | str = "read header"; | |
251 | break; | |
252 | case SSL_ST_READ_BODY: | |
253 | str = "read body"; | |
254 | break; | |
255 | case SSL_ST_READ_DONE: | |
256 | str = "read done"; | |
257 | break; | |
258 | default: | |
259 | str = "unknown"; | |
260 | break; | |
261 | } | |
262 | return (str); | |
263 | } | |
264 | ||
265 | const char *SSL_rstate_string(const SSL *s) | |
266 | { | |
267 | const char *str; | |
268 | ||
269 | switch (s->rlayer.rstate) { | |
270 | case SSL_ST_READ_HEADER: | |
271 | str = "RH"; | |
272 | break; | |
273 | case SSL_ST_READ_BODY: | |
274 | str = "RB"; | |
275 | break; | |
276 | case SSL_ST_READ_DONE: | |
277 | str = "RD"; | |
278 | break; | |
279 | default: | |
280 | str = "unknown"; | |
281 | break; | |
282 | } | |
283 | return (str); | |
284 | } | |
285 | ||
94777c9c | 286 | int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) |
0f113f3e MC |
287 | { |
288 | /* | |
289 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
290 | * packet by another n bytes. The packet will be in the sub-array of | |
291 | * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If | |
52e1d7b1 | 292 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 293 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
294 | * if clearold == 1, move the packet to the start of the buffer; if |
295 | * clearold == 0 then leave any old packets where they were | |
0f113f3e MC |
296 | */ |
297 | int i, len, left; | |
f4bd5de5 | 298 | size_t align = 0; |
0f113f3e MC |
299 | unsigned char *pkt; |
300 | SSL3_BUFFER *rb; | |
301 | ||
302 | if (n <= 0) | |
303 | return n; | |
304 | ||
88c23039 | 305 | rb = &s->rlayer.rbuf; |
0f113f3e MC |
306 | if (rb->buf == NULL) |
307 | if (!ssl3_setup_read_buffer(s)) | |
308 | return -1; | |
309 | ||
310 | left = rb->left; | |
a4d64c7f | 311 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 AP |
312 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
313 | align = (0-align) & (SSL3_ALIGN_PAYLOAD - 1); | |
a4d64c7f | 314 | #endif |
d02b48c6 | 315 | |
0f113f3e MC |
316 | if (!extend) { |
317 | /* start with empty packet ... */ | |
318 | if (left == 0) | |
319 | rb->offset = align; | |
320 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
321 | /* | |
322 | * check if next packet length is large enough to justify payload | |
323 | * alignment... | |
324 | */ | |
325 | pkt = rb->buf + rb->offset; | |
326 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
327 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
328 | /* | |
329 | * Note that even if packet is corrupted and its length field | |
330 | * is insane, we can only be led to wrong decision about | |
331 | * whether memmove will occur or not. Header values has no | |
332 | * effect on memmove arguments and therefore no buffer | |
333 | * overrun can be triggered. | |
334 | */ | |
335 | memmove(rb->buf + align, pkt, left); | |
336 | rb->offset = align; | |
337 | } | |
338 | } | |
7a7048af MC |
339 | s->rlayer.packet = rb->buf + rb->offset; |
340 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
341 | /* ... now we can act as if 'extend' was set */ |
342 | } | |
343 | ||
344 | /* | |
345 | * For DTLS/UDP reads should not span multiple packets because the read | |
346 | * operation returns the whole packet at once (as long as it fits into | |
347 | * the buffer). | |
348 | */ | |
349 | if (SSL_IS_DTLS(s)) { | |
350 | if (left == 0 && extend) | |
351 | return 0; | |
352 | if (left > 0 && n > left) | |
353 | n = left; | |
354 | } | |
355 | ||
356 | /* if there is enough in the buffer from a previous read, take some */ | |
357 | if (left >= n) { | |
7a7048af | 358 | s->rlayer.packet_length += n; |
0f113f3e MC |
359 | rb->left = left - n; |
360 | rb->offset += n; | |
361 | return (n); | |
362 | } | |
363 | ||
364 | /* else we need to read more data */ | |
365 | ||
7a7048af | 366 | len = s->rlayer.packet_length; |
0f113f3e MC |
367 | pkt = rb->buf + align; |
368 | /* | |
369 | * Move any available bytes to front of buffer: 'len' bytes already | |
370 | * pointed to by 'packet', 'left' extra ones at the end | |
371 | */ | |
94777c9c | 372 | if (s->rlayer.packet != pkt && clearold == 1) { /* len > 0 */ |
7a7048af MC |
373 | memmove(pkt, s->rlayer.packet, len + left); |
374 | s->rlayer.packet = pkt; | |
0f113f3e MC |
375 | rb->offset = len + align; |
376 | } | |
377 | ||
378 | if (n > (int)(rb->len - rb->offset)) { /* does not happen */ | |
379 | SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); | |
380 | return -1; | |
381 | } | |
382 | ||
8dd4ad0f | 383 | /* We always act like read_ahead is set for DTLS */ |
4118dfdc | 384 | if (!s->rlayer.read_ahead && !SSL_IS_DTLS(s)) |
0f113f3e MC |
385 | /* ignore max parameter */ |
386 | max = n; | |
387 | else { | |
388 | if (max < n) | |
389 | max = n; | |
390 | if (max > (int)(rb->len - rb->offset)) | |
391 | max = rb->len - rb->offset; | |
392 | } | |
393 | ||
394 | while (left < n) { | |
395 | /* | |
396 | * Now we have len+left bytes at the front of s->s3->rbuf.buf and | |
397 | * need to read in more until we have len+n (up to len+max if | |
398 | * possible) | |
399 | */ | |
400 | ||
401 | clear_sys_error(); | |
402 | if (s->rbio != NULL) { | |
403 | s->rwstate = SSL_READING; | |
404 | i = BIO_read(s->rbio, pkt + len + left, max - left); | |
405 | } else { | |
406 | SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); | |
407 | i = -1; | |
408 | } | |
409 | ||
410 | if (i <= 0) { | |
411 | rb->left = left; | |
412 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
413 | if (len + left == 0) | |
414 | ssl3_release_read_buffer(s); | |
415 | return (i); | |
416 | } | |
417 | left += i; | |
418 | /* | |
419 | * reads should *never* span multiple packets for DTLS because the | |
420 | * underlying transport protocol is message oriented as opposed to | |
421 | * byte oriented as in the TLS case. | |
422 | */ | |
423 | if (SSL_IS_DTLS(s)) { | |
424 | if (n > left) | |
425 | n = left; /* makes the while condition false */ | |
426 | } | |
427 | } | |
428 | ||
429 | /* done reading, now the book-keeping */ | |
430 | rb->offset += n; | |
431 | rb->left = left - n; | |
7a7048af | 432 | s->rlayer.packet_length += n; |
0f113f3e MC |
433 | s->rwstate = SSL_NOTHING; |
434 | return (n); | |
435 | } | |
436 | ||
d02b48c6 | 437 | |
0f113f3e MC |
438 | /* |
439 | * Call this to write data in records of type 'type' It will return <= 0 if | |
440 | * not all data has been sent or non-blocking IO. | |
d02b48c6 | 441 | */ |
52732b38 | 442 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) |
0f113f3e MC |
443 | { |
444 | const unsigned char *buf = buf_; | |
445 | int tot; | |
446 | unsigned int n, nw; | |
f1f7598c | 447 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
d102d9df | 448 | unsigned int max_send_fragment, split_send_fragment, maxpipes; |
dc2a1af8 | 449 | unsigned int u_len = (unsigned int)len; |
f1f7598c | 450 | #endif |
d102d9df | 451 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 452 | int i; |
0f113f3e MC |
453 | |
454 | if (len < 0) { | |
455 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_NEGATIVE_LENGTH); | |
456 | return -1; | |
457 | } | |
458 | ||
459 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 460 | tot = s->rlayer.wnum; |
0f113f3e MC |
461 | /* |
462 | * ensure that if we end up with a smaller value of data to write out | |
463 | * than the the original len from a write which didn't complete for | |
464 | * non-blocking I/O and also somehow ended up avoiding the check for | |
465 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
466 | * possible to end up with (len-tot) as a large number that will then | |
467 | * promptly send beyond the end of the users buffer ... so we trap and | |
468 | * report the error in a way the user will notice | |
469 | */ | |
1c2e5d56 | 470 | if ((unsigned int)len < s->rlayer.wnum) { |
0f113f3e | 471 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); |
1c2e5d56 MC |
472 | return -1; |
473 | } | |
474 | ||
475 | ||
476 | s->rlayer.wnum = 0; | |
477 | ||
478 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) { | |
479 | i = s->handshake_func(s); | |
480 | if (i < 0) | |
481 | return (i); | |
482 | if (i == 0) { | |
483 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
484 | return -1; | |
485 | } | |
0f113f3e MC |
486 | } |
487 | ||
488 | /* | |
489 | * first check if there is a SSL3_BUFFER still being written out. This | |
490 | * will happen with non blocking IO | |
491 | */ | |
492 | if (wb->left != 0) { | |
f8caa3c8 | 493 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot); |
0f113f3e MC |
494 | if (i <= 0) { |
495 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 496 | s->rlayer.wnum = tot; |
0f113f3e MC |
497 | return i; |
498 | } | |
499 | tot += i; /* this might be last fragment */ | |
500 | } | |
a9c6edcd | 501 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
502 | /* |
503 | * Depending on platform multi-block can deliver several *times* | |
504 | * better performance. Downside is that it has to allocate | |
505 | * jumbo buffer to accomodate up to 8 records, but the | |
506 | * compromise is considered worthy. | |
507 | */ | |
508 | if (type == SSL3_RT_APPLICATION_DATA && | |
509 | u_len >= 4 * (max_send_fragment = s->max_send_fragment) && | |
510 | s->compress == NULL && s->msg_callback == NULL && | |
511 | !SSL_USE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && | |
846ec07d | 512 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
513 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
514 | unsigned char aad[13]; | |
515 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
516 | int packlen; | |
517 | ||
518 | /* minimize address aliasing conflicts */ | |
519 | if ((max_send_fragment & 0xfff) == 0) | |
520 | max_send_fragment -= 512; | |
521 | ||
522 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
523 | ssl3_release_write_buffer(s); | |
524 | ||
525 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
526 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
527 | max_send_fragment, NULL); | |
528 | ||
529 | if (u_len >= 8 * max_send_fragment) | |
530 | packlen *= 8; | |
531 | else | |
532 | packlen *= 4; | |
533 | ||
534 | wb->buf = OPENSSL_malloc(packlen); | |
a71edf3b | 535 | if (wb->buf == NULL) { |
918bb865 MC |
536 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); |
537 | return -1; | |
538 | } | |
0f113f3e MC |
539 | wb->len = packlen; |
540 | } else if (tot == len) { /* done? */ | |
541 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
542 | wb->buf = NULL; | |
543 | return tot; | |
544 | } | |
545 | ||
546 | n = (len - tot); | |
547 | for (;;) { | |
548 | if (n < 4 * max_send_fragment) { | |
549 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
550 | wb->buf = NULL; | |
551 | break; | |
552 | } | |
553 | ||
554 | if (s->s3->alert_dispatch) { | |
555 | i = s->method->ssl_dispatch_alert(s); | |
556 | if (i <= 0) { | |
e2228d31 | 557 | s->rlayer.wnum = tot; |
0f113f3e MC |
558 | return i; |
559 | } | |
560 | } | |
561 | ||
562 | if (n >= 8 * max_send_fragment) | |
563 | nw = max_send_fragment * (mb_param.interleave = 8); | |
564 | else | |
565 | nw = max_send_fragment * (mb_param.interleave = 4); | |
566 | ||
de07f311 | 567 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
568 | aad[8] = type; |
569 | aad[9] = (unsigned char)(s->version >> 8); | |
570 | aad[10] = (unsigned char)(s->version); | |
571 | aad[11] = 0; | |
572 | aad[12] = 0; | |
573 | mb_param.out = NULL; | |
574 | mb_param.inp = aad; | |
575 | mb_param.len = nw; | |
576 | ||
577 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
578 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, | |
579 | sizeof(mb_param), &mb_param); | |
580 | ||
581 | if (packlen <= 0 || packlen > (int)wb->len) { /* never happens */ | |
582 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
583 | wb->buf = NULL; | |
584 | break; | |
585 | } | |
586 | ||
587 | mb_param.out = wb->buf; | |
588 | mb_param.inp = &buf[tot]; | |
589 | mb_param.len = nw; | |
590 | ||
591 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
592 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
593 | sizeof(mb_param), &mb_param) <= 0) | |
594 | return -1; | |
595 | ||
de07f311 MC |
596 | s->rlayer.write_sequence[7] += mb_param.interleave; |
597 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 598 | int j = 6; |
de07f311 | 599 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
600 | } |
601 | ||
602 | wb->offset = 0; | |
603 | wb->left = packlen; | |
604 | ||
f8caa3c8 MC |
605 | s->rlayer.wpend_tot = nw; |
606 | s->rlayer.wpend_buf = &buf[tot]; | |
607 | s->rlayer.wpend_type = type; | |
608 | s->rlayer.wpend_ret = nw; | |
0f113f3e MC |
609 | |
610 | i = ssl3_write_pending(s, type, &buf[tot], nw); | |
611 | if (i <= 0) { | |
1d2a18dc | 612 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
0f113f3e MC |
613 | OPENSSL_free(wb->buf); |
614 | wb->buf = NULL; | |
615 | } | |
e2228d31 | 616 | s->rlayer.wnum = tot; |
0f113f3e MC |
617 | return i; |
618 | } | |
619 | if (i == (int)n) { | |
620 | OPENSSL_free(wb->buf); /* free jumbo buffer */ | |
621 | wb->buf = NULL; | |
622 | return tot + i; | |
623 | } | |
624 | n -= i; | |
625 | tot += i; | |
626 | } | |
627 | } else | |
a9c6edcd | 628 | #endif |
0f113f3e MC |
629 | if (tot == len) { /* done? */ |
630 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
631 | ssl3_release_write_buffer(s); | |
632 | ||
633 | return tot; | |
634 | } | |
635 | ||
636 | n = (len - tot); | |
d102d9df MC |
637 | |
638 | split_send_fragment = s->split_send_fragment; | |
639 | /* | |
640 | * If max_pipelines is 0 then this means "undefined" and we default to | |
641 | * 1 pipeline. Similaraly if the cipher does not support pipelined | |
642 | * processing then we also only use 1 pipeline, or if we're not using | |
643 | * explicit IVs | |
644 | */ | |
645 | maxpipes = s->max_pipelines; | |
646 | if (maxpipes > SSL_MAX_PIPELINES) { | |
647 | /* | |
648 | * We should have prevented this when we set max_pipelines so we | |
649 | * shouldn't get here | |
650 | */ | |
651 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); | |
652 | return -1; | |
653 | } | |
654 | if (maxpipes == 0 | |
655 | || s->enc_write_ctx == NULL | |
656 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
657 | & EVP_CIPH_FLAG_PIPELINE) | |
658 | || !SSL_USE_EXPLICIT_IV(s)) | |
659 | maxpipes = 1; | |
660 | if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment | |
661 | || split_send_fragment == 0) { | |
662 | /* | |
663 | * We should have prevented this when we set the split and max send | |
664 | * fragments so we shouldn't get here | |
665 | */ | |
666 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); | |
667 | return -1; | |
668 | } | |
669 | ||
0f113f3e | 670 | for (;;) { |
d102d9df MC |
671 | unsigned int pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
672 | unsigned int numpipes, j; | |
673 | ||
674 | if (n == 0) | |
675 | numpipes = 1; | |
0f113f3e | 676 | else |
d102d9df MC |
677 | numpipes = ((n - 1) / split_send_fragment) + 1; |
678 | if (numpipes > maxpipes) | |
679 | numpipes = maxpipes; | |
680 | ||
681 | if (n / numpipes >= s->max_send_fragment) { | |
682 | /* | |
683 | * We have enough data to completely fill all available | |
684 | * pipelines | |
685 | */ | |
686 | for (j = 0; j < numpipes; j++) { | |
687 | pipelens[j] = s->max_send_fragment; | |
688 | } | |
689 | } else { | |
690 | /* We can partially fill all available pipelines */ | |
691 | tmppipelen = n / numpipes; | |
692 | remain = n % numpipes; | |
693 | for (j = 0; j < numpipes; j++) { | |
694 | pipelens[j] = tmppipelen; | |
695 | if (j < remain) | |
696 | pipelens[j]++; | |
697 | } | |
698 | } | |
0f113f3e | 699 | |
d102d9df | 700 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0); |
0f113f3e MC |
701 | if (i <= 0) { |
702 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 703 | s->rlayer.wnum = tot; |
0f113f3e MC |
704 | return i; |
705 | } | |
706 | ||
707 | if ((i == (int)n) || | |
708 | (type == SSL3_RT_APPLICATION_DATA && | |
709 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
710 | /* | |
711 | * next chunk of data should get another prepended empty fragment | |
712 | * in ciphersuites with known-IV weakness: | |
713 | */ | |
714 | s->s3->empty_fragment_done = 0; | |
715 | ||
716 | if ((i == (int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && | |
717 | !SSL_IS_DTLS(s)) | |
718 | ssl3_release_write_buffer(s); | |
719 | ||
720 | return tot + i; | |
721 | } | |
722 | ||
723 | n -= i; | |
724 | tot += i; | |
725 | } | |
726 | } | |
d02b48c6 | 727 | |
c103c7e2 | 728 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
d102d9df MC |
729 | unsigned int *pipelens, unsigned int numpipes, |
730 | int create_empty_fragment) | |
0f113f3e | 731 | { |
d102d9df MC |
732 | unsigned char *outbuf[SSL_MAX_PIPELINES], *plen[SSL_MAX_PIPELINES]; |
733 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; | |
0f113f3e MC |
734 | int i, mac_size, clear = 0; |
735 | int prefix_len = 0; | |
736 | int eivlen; | |
f4bd5de5 | 737 | size_t align = 0; |
d102d9df | 738 | SSL3_BUFFER *wb; |
0f113f3e | 739 | SSL_SESSION *sess; |
d102d9df MC |
740 | unsigned int totlen = 0; |
741 | unsigned int j; | |
0f113f3e | 742 | |
d102d9df MC |
743 | for (j = 0; j < numpipes; j++) |
744 | totlen += pipelens[j]; | |
0f113f3e MC |
745 | /* |
746 | * first check if there is a SSL3_BUFFER still being written out. This | |
747 | * will happen with non blocking IO | |
748 | */ | |
d102d9df MC |
749 | if (RECORD_LAYER_write_pending(&s->rlayer)) |
750 | return (ssl3_write_pending(s, type, buf, totlen)); | |
0f113f3e MC |
751 | |
752 | /* If we have an alert to send, lets send it */ | |
753 | if (s->s3->alert_dispatch) { | |
754 | i = s->method->ssl_dispatch_alert(s); | |
755 | if (i <= 0) | |
756 | return (i); | |
757 | /* if it went, fall through and send more stuff */ | |
758 | } | |
759 | ||
d102d9df MC |
760 | if (s->rlayer.numwpipes < numpipes) |
761 | if (!ssl3_setup_write_buffer(s, numpipes)) | |
0f113f3e MC |
762 | return -1; |
763 | ||
d102d9df | 764 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
765 | return 0; |
766 | ||
0f113f3e MC |
767 | sess = s->session; |
768 | ||
769 | if ((sess == NULL) || | |
770 | (s->enc_write_ctx == NULL) || | |
771 | (EVP_MD_CTX_md(s->write_hash) == NULL)) { | |
0f113f3e | 772 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
773 | mac_size = 0; |
774 | } else { | |
775 | mac_size = EVP_MD_CTX_size(s->write_hash); | |
776 | if (mac_size < 0) | |
777 | goto err; | |
778 | } | |
d02b48c6 | 779 | |
0f113f3e MC |
780 | /* |
781 | * 'create_empty_fragment' is true only when this function calls itself | |
782 | */ | |
783 | if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done) { | |
784 | /* | |
785 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
786 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
787 | */ | |
788 | ||
789 | if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { | |
790 | /* | |
791 | * recursive function call with 'create_empty_fragment' set; this | |
792 | * prepares and buffers the data for an empty fragment (these | |
793 | * 'prefix_len' bytes are sent out later together with the actual | |
794 | * payload) | |
795 | */ | |
d102d9df MC |
796 | unsigned int tmppipelen = 0; |
797 | ||
798 | prefix_len = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1); | |
0f113f3e MC |
799 | if (prefix_len <= 0) |
800 | goto err; | |
801 | ||
802 | if (prefix_len > | |
803 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) | |
804 | { | |
805 | /* insufficient space */ | |
806 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
807 | goto err; | |
808 | } | |
809 | } | |
810 | ||
811 | s->s3->empty_fragment_done = 1; | |
812 | } | |
813 | ||
814 | if (create_empty_fragment) { | |
d102d9df | 815 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 816 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
817 | /* |
818 | * extra fragment would be couple of cipher blocks, which would be | |
819 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
820 | * payload, then we can just pretent we simply have two headers. | |
821 | */ | |
f4bd5de5 AP |
822 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
823 | align = (0-align) & (SSL3_ALIGN_PAYLOAD - 1); | |
a4d64c7f | 824 | #endif |
d102d9df | 825 | outbuf[0] = SSL3_BUFFER_get_buf(wb) + align; |
747e1639 | 826 | SSL3_BUFFER_set_offset(wb, align); |
0f113f3e | 827 | } else if (prefix_len) { |
d102d9df MC |
828 | wb = &s->rlayer.wbuf[0]; |
829 | outbuf[0] = SSL3_BUFFER_get_buf(wb) + SSL3_BUFFER_get_offset(wb) | |
830 | + prefix_len; | |
0f113f3e | 831 | } else { |
d102d9df MC |
832 | for (j=0; j < numpipes; j++) { |
833 | wb = &s->rlayer.wbuf[j]; | |
a4d64c7f | 834 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
d102d9df MC |
835 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
836 | align = (-align) & (SSL3_ALIGN_PAYLOAD - 1); | |
a4d64c7f | 837 | #endif |
d102d9df MC |
838 | outbuf[j] = SSL3_BUFFER_get_buf(wb) + align; |
839 | SSL3_BUFFER_set_offset(wb, align); | |
840 | } | |
0f113f3e MC |
841 | } |
842 | ||
0f113f3e MC |
843 | /* Explicit IV length, block ciphers appropriate version flag */ |
844 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s)) { | |
845 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); | |
846 | if (mode == EVP_CIPH_CBC_MODE) { | |
847 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); | |
848 | if (eivlen <= 1) | |
849 | eivlen = 0; | |
850 | } | |
851 | /* Need explicit part of IV for GCM mode */ | |
852 | else if (mode == EVP_CIPH_GCM_MODE) | |
853 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
e75c5a79 DSH |
854 | else if (mode == EVP_CIPH_CCM_MODE) |
855 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
0f113f3e MC |
856 | else |
857 | eivlen = 0; | |
858 | } else | |
859 | eivlen = 0; | |
860 | ||
747e1639 | 861 | |
d102d9df MC |
862 | totlen = 0; |
863 | /* Clear our SSL3_RECORD structures */ | |
864 | memset(wr, 0, sizeof wr); | |
865 | for (j=0; j < numpipes; j++) { | |
866 | /* write the header */ | |
867 | *(outbuf[j]++) = type & 0xff; | |
868 | SSL3_RECORD_set_type(&wr[j], type); | |
0f113f3e | 869 | |
d102d9df MC |
870 | *(outbuf[j]++) = (s->version >> 8); |
871 | /* | |
872 | * Some servers hang if iniatial client hello is larger than 256 bytes | |
873 | * and record version number > TLS 1.0 | |
874 | */ | |
875 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
876 | && !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION) | |
877 | *(outbuf[j]++) = 0x1; | |
878 | else | |
879 | *(outbuf[j]++) = s->version & 0xff; | |
0f113f3e | 880 | |
d102d9df MC |
881 | /* field where we are to write out packet length */ |
882 | plen[j] = outbuf[j]; | |
883 | outbuf[j] += 2; | |
0f113f3e | 884 | |
d102d9df MC |
885 | /* lets setup the record stuff. */ |
886 | SSL3_RECORD_set_data(&wr[j], outbuf[j] + eivlen); | |
887 | SSL3_RECORD_set_length(&wr[j], (int)pipelens[j]); | |
888 | SSL3_RECORD_set_input(&wr[j], (unsigned char *)&buf[totlen]); | |
889 | totlen += pipelens[j]; | |
0f113f3e | 890 | |
d102d9df MC |
891 | /* |
892 | * we now 'read' from wr->input, wr->length bytes into wr->data | |
893 | */ | |
0f113f3e | 894 | |
d102d9df MC |
895 | /* first we compress */ |
896 | if (s->compress != NULL) { | |
897 | if (!ssl3_do_compress(s, &wr[j])) { | |
898 | SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); | |
899 | goto err; | |
900 | } | |
901 | } else { | |
902 | memcpy(wr[j].data, wr[j].input, wr[j].length); | |
903 | SSL3_RECORD_reset_input(&wr[j]); | |
904 | } | |
0f113f3e | 905 | |
0f113f3e | 906 | /* |
d102d9df MC |
907 | * we should still have the output to wr->data and the input from |
908 | * wr->input. Length should be wr->length. wr->data still points in the | |
909 | * wb->buf | |
0f113f3e | 910 | */ |
0f113f3e | 911 | |
d102d9df MC |
912 | if (!SSL_USE_ETM(s) && mac_size != 0) { |
913 | if (s->method->ssl3_enc->mac(s, &wr[j], | |
914 | &(outbuf[j][wr[j].length + eivlen]), 1) < 0) | |
915 | goto err; | |
916 | SSL3_RECORD_add_length(&wr[j], mac_size); | |
917 | } | |
0f113f3e | 918 | |
d102d9df MC |
919 | |
920 | SSL3_RECORD_set_data(&wr[j], outbuf[j]); | |
921 | SSL3_RECORD_reset_input(&wr[j]); | |
922 | ||
923 | if (eivlen) { | |
924 | /* | |
925 | * if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err; | |
926 | */ | |
927 | SSL3_RECORD_add_length(&wr[j], eivlen); | |
928 | } | |
0f113f3e MC |
929 | } |
930 | ||
d102d9df MC |
931 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) |
932 | goto err; | |
0f113f3e | 933 | |
d102d9df MC |
934 | for (j=0; j < numpipes; j++) { |
935 | if (SSL_USE_ETM(s) && mac_size != 0) { | |
936 | if (s->method->ssl3_enc->mac(s, &wr[j], | |
937 | outbuf[j] + wr[j].length, 1) < 0) | |
938 | goto err; | |
939 | SSL3_RECORD_add_length(&wr[j], mac_size); | |
940 | } | |
0f113f3e | 941 | |
d102d9df MC |
942 | /* record length after mac and block padding */ |
943 | s2n(SSL3_RECORD_get_length(&wr[j]), plen[j]); | |
944 | ||
945 | if (s->msg_callback) | |
946 | s->msg_callback(1, 0, SSL3_RT_HEADER, plen[j] - 5, 5, s, | |
947 | s->msg_callback_arg); | |
0f113f3e | 948 | |
0f113f3e | 949 | /* |
d102d9df MC |
950 | * we should now have wr->data pointing to the encrypted data, which is |
951 | * wr->length long | |
0f113f3e | 952 | */ |
d102d9df MC |
953 | SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for debugging */ |
954 | SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); | |
955 | ||
956 | if (create_empty_fragment) { | |
957 | /* | |
958 | * we are in a recursive call; just return the length, don't write | |
959 | * out anything here | |
960 | */ | |
961 | if (j > 0) { | |
962 | /* We should never be pipelining an empty fragment!! */ | |
963 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
964 | goto err; | |
965 | } | |
966 | return SSL3_RECORD_get_length(wr); | |
967 | } | |
968 | ||
969 | /* now let's set up wb */ | |
970 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
971 | prefix_len + SSL3_RECORD_get_length(&wr[j])); | |
0f113f3e MC |
972 | } |
973 | ||
d102d9df | 974 | |
0f113f3e MC |
975 | |
976 | /* | |
977 | * memorize arguments so that ssl3_write_pending can detect bad write | |
978 | * retries later | |
979 | */ | |
d102d9df | 980 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
981 | s->rlayer.wpend_buf = buf; |
982 | s->rlayer.wpend_type = type; | |
d102d9df | 983 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
984 | |
985 | /* we now just need to write the buffer */ | |
d102d9df | 986 | return ssl3_write_pending(s, type, buf, totlen); |
0f113f3e MC |
987 | err: |
988 | return -1; | |
989 | } | |
d02b48c6 RE |
990 | |
991 | /* if s->s3->wbuf.left != 0, we need to call this */ | |
36d16f8e | 992 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, |
0f113f3e MC |
993 | unsigned int len) |
994 | { | |
995 | int i; | |
d102d9df MC |
996 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
997 | unsigned int currbuf = 0; | |
d02b48c6 | 998 | |
58964a49 | 999 | /* XXXX */ |
f8caa3c8 MC |
1000 | if ((s->rlayer.wpend_tot > (int)len) |
1001 | || ((s->rlayer.wpend_buf != buf) && | |
0f113f3e | 1002 | !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) |
f8caa3c8 | 1003 | || (s->rlayer.wpend_type != type)) { |
0f113f3e MC |
1004 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
1005 | return (-1); | |
1006 | } | |
1007 | ||
1008 | for (;;) { | |
d102d9df MC |
1009 | /* Loop until we find a buffer we haven't written out yet */ |
1010 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
1011 | && currbuf < s->rlayer.numwpipes - 1) { | |
1012 | currbuf++; | |
1013 | continue; | |
1014 | } | |
0f113f3e MC |
1015 | clear_sys_error(); |
1016 | if (s->wbio != NULL) { | |
1017 | s->rwstate = SSL_WRITING; | |
1018 | i = BIO_write(s->wbio, | |
d102d9df MC |
1019 | (char *)&(SSL3_BUFFER_get_buf(&wb[currbuf])[ |
1020 | SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1021 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
0f113f3e MC |
1022 | } else { |
1023 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); | |
1024 | i = -1; | |
1025 | } | |
d102d9df MC |
1026 | if (i == SSL3_BUFFER_get_left(&wb[currbuf])) { |
1027 | SSL3_BUFFER_set_left(&wb[currbuf], 0); | |
1028 | SSL3_BUFFER_add_offset(&wb[currbuf], i); | |
1029 | if (currbuf + 1 < s->rlayer.numwpipes) | |
1030 | continue; | |
0f113f3e | 1031 | s->rwstate = SSL_NOTHING; |
f8caa3c8 | 1032 | return (s->rlayer.wpend_ret); |
0f113f3e | 1033 | } else if (i <= 0) { |
5e8b24db | 1034 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1035 | /* |
1036 | * For DTLS, just drop it. That's kind of the whole point in | |
1037 | * using a datagram service | |
1038 | */ | |
d102d9df | 1039 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e MC |
1040 | } |
1041 | return (i); | |
1042 | } | |
d102d9df MC |
1043 | SSL3_BUFFER_add_offset(&wb[currbuf], i); |
1044 | SSL3_BUFFER_add_left(&wb[currbuf], -i); | |
0f113f3e MC |
1045 | } |
1046 | } | |
d02b48c6 | 1047 | |
1d97c843 TH |
1048 | /*- |
1049 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1050 | * 'type' is one of the following: |
1051 | * | |
1052 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1053 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1054 | * - 0 (during a shutdown, no data has to be returned) | |
1055 | * | |
1056 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1057 | * (possibly multiple records if we still don't have anything to return). | |
1058 | * | |
1059 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1060 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1061 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1062 | * argument is non NULL. | |
b35e9050 BM |
1063 | * Also if record payloads contain fragments too small to process, we store |
1064 | * them until there is enough for the respective protocol (the record protocol | |
1065 | * may use arbitrary fragmentation and even interleaving): | |
1066 | * Change cipher spec protocol | |
1067 | * just 1 byte needed, no need for keeping anything stored | |
1068 | * Alert protocol | |
1069 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1070 | * Handshake protocol | |
1071 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1072 | * to detect unexpected Client Hello and Hello Request messages | |
1073 | * here, anything else is handled by higher layers | |
1074 | * Application data protocol | |
1075 | * none of our business | |
1076 | */ | |
657da85e MC |
1077 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
1078 | int len, int peek) | |
0f113f3e MC |
1079 | { |
1080 | int al, i, j, ret; | |
94777c9c | 1081 | unsigned int n, curr_rec, num_recs, read_bytes; |
0f113f3e | 1082 | SSL3_RECORD *rr; |
94777c9c | 1083 | SSL3_BUFFER *rbuf; |
0f113f3e MC |
1084 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
1085 | ||
94777c9c MC |
1086 | rbuf = &s->rlayer.rbuf; |
1087 | ||
1088 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1089 | /* Not initialized yet */ |
0f113f3e MC |
1090 | if (!ssl3_setup_read_buffer(s)) |
1091 | return (-1); | |
28d59af8 | 1092 | } |
0f113f3e MC |
1093 | |
1094 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1095 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1096 | && (type != | |
1097 | SSL3_RT_APPLICATION_DATA))) { | |
1098 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1099 | return -1; | |
1100 | } | |
1101 | ||
4aa7389e | 1102 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1103 | /* (partially) satisfy request from storage */ |
1104 | { | |
4aa7389e | 1105 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1106 | unsigned char *dst = buf; |
1107 | unsigned int k; | |
1108 | ||
1109 | /* peek == 0 */ | |
1110 | n = 0; | |
4aa7389e | 1111 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1112 | *dst++ = *src++; |
1113 | len--; | |
4aa7389e | 1114 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1115 | n++; |
1116 | } | |
1117 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1118 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1119 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1120 | |
1121 | if (recvd_type != NULL) | |
1122 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1123 | ||
0f113f3e MC |
1124 | return n; |
1125 | } | |
1126 | ||
1127 | /* | |
4aa7389e | 1128 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1129 | */ |
1130 | ||
024f543c | 1131 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1132 | /* type == SSL3_RT_APPLICATION_DATA */ |
1133 | i = s->handshake_func(s); | |
1134 | if (i < 0) | |
1135 | return (i); | |
1136 | if (i == 0) { | |
1137 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
1138 | return (-1); | |
1139 | } | |
1140 | } | |
1141 | start: | |
1142 | s->rwstate = SSL_NOTHING; | |
1143 | ||
50e735f9 | 1144 | /*- |
94777c9c MC |
1145 | * For each record 'i' up to |num_recs] |
1146 | * rr[i].type - is the type of record | |
1147 | * rr[i].data, - data | |
1148 | * rr[i].off, - offset into 'data' for next read | |
1149 | * rr[i].length, - number of bytes. | |
50e735f9 | 1150 | */ |
94777c9c MC |
1151 | rr = s->rlayer.rrec; |
1152 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1153 | ||
1154 | do { | |
1155 | /* get new records if necessary */ | |
1156 | if (num_recs == 0) { | |
1157 | ret = ssl3_get_record(s); | |
1158 | if (ret <= 0) | |
1159 | return (ret); | |
1160 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1161 | if (num_recs == 0) { | |
1162 | /* Shouldn't happen */ | |
1163 | al = SSL_AD_INTERNAL_ERROR; | |
1164 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1165 | goto f_err; | |
1166 | } | |
1167 | } | |
1168 | /* Skip over any records we have already used or are zero in length */ | |
1169 | for (curr_rec = 0; | |
1170 | curr_rec < num_recs && SSL3_RECORD_get_length(&rr[curr_rec]) == 0; | |
1171 | curr_rec++); | |
1172 | if (curr_rec == num_recs) { | |
1173 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1174 | num_recs = 0; | |
1175 | curr_rec = 0; | |
1176 | } | |
1177 | } while (num_recs == 0); | |
1178 | rr = &rr[curr_rec]; | |
0f113f3e MC |
1179 | |
1180 | /* we now have a packet which can be read and processed */ | |
1181 | ||
1182 | if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, | |
1183 | * reset by ssl3_get_finished */ | |
747e1639 | 1184 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
1185 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1186 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1187 | goto f_err; | |
1188 | } | |
1189 | ||
1190 | /* | |
1191 | * If the other end has shut down, throw anything we read away (even in | |
1192 | * 'peek' mode) | |
1193 | */ | |
1194 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1195 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1196 | s->rwstate = SSL_NOTHING; |
1197 | return (0); | |
1198 | } | |
1199 | ||
657da85e MC |
1200 | if (type == SSL3_RECORD_get_type(rr) |
1201 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC | |
1202 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) { | |
1203 | /* | |
1204 | * SSL3_RT_APPLICATION_DATA or | |
1205 | * SSL3_RT_HANDSHAKE or | |
1206 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1207 | */ | |
0f113f3e MC |
1208 | /* |
1209 | * make sure that we are not getting application data when we are | |
1210 | * doing a handshake for the first time | |
1211 | */ | |
1212 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1213 | (s->enc_read_ctx == NULL)) { | |
1214 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1215 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE); | |
1216 | goto f_err; | |
1217 | } | |
1218 | ||
657da85e MC |
1219 | if (type == SSL3_RT_HANDSHAKE |
1220 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC | |
1221 | && s->rlayer.handshake_fragment_len > 0) { | |
1222 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1223 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1224 | goto f_err; | |
1225 | } | |
1226 | ||
1227 | if (recvd_type != NULL) | |
1228 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1229 | ||
0f113f3e MC |
1230 | if (len <= 0) |
1231 | return (len); | |
1232 | ||
94777c9c MC |
1233 | read_bytes = 0; |
1234 | do { | |
1235 | if ((unsigned int)len - read_bytes > SSL3_RECORD_get_length(rr)) | |
1236 | n = SSL3_RECORD_get_length(rr); | |
1237 | else | |
1238 | n = (unsigned int)len - read_bytes; | |
1239 | ||
1240 | memcpy(buf, &(rr->data[rr->off]), n); | |
1241 | buf += n; | |
1242 | if (!peek) { | |
1243 | SSL3_RECORD_add_length(rr, -n); | |
1244 | SSL3_RECORD_add_off(rr, n); | |
1245 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1246 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1247 | SSL3_RECORD_set_off(rr, 0); | |
1248 | } | |
0f113f3e | 1249 | } |
94777c9c MC |
1250 | if (SSL3_RECORD_get_length(rr) == 0 |
1251 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1252 | curr_rec++; | |
1253 | rr++; | |
1254 | } | |
1255 | read_bytes += n; | |
1256 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs | |
1257 | && read_bytes < (unsigned int)len); | |
1258 | if (!peek && curr_rec == num_recs | |
1259 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) | |
1260 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
1261 | ssl3_release_read_buffer(s); | |
1262 | return read_bytes; | |
0f113f3e MC |
1263 | } |
1264 | ||
1265 | /* | |
1266 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1267 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1268 | * were actually expecting a CCS). | |
0f113f3e MC |
1269 | */ |
1270 | ||
657da85e MC |
1271 | if (rr->type == SSL3_RT_HANDSHAKE && type == SSL3_RT_CHANGE_CIPHER_SPEC) { |
1272 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1273 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1274 | goto f_err; | |
1275 | } | |
1276 | ||
32ec4153 MC |
1277 | /* |
1278 | * Lets just double check that we've not got an SSLv2 record | |
1279 | */ | |
1280 | if (rr->rec_version == SSL2_VERSION) { | |
1281 | /* | |
1282 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1283 | * record back if this is the first packet and we are looking for an | |
1284 | * initial ClientHello. Therefore |type| should always be equal to | |
1285 | * |rr->type|. If not then something has gone horribly wrong | |
1286 | */ | |
1287 | al = SSL_AD_INTERNAL_ERROR; | |
1288 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1289 | goto f_err; | |
1290 | } | |
1291 | ||
d45ba43d | 1292 | if(s->method->version == TLS_ANY_VERSION |
13c9bb3e MC |
1293 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
1294 | /* | |
1295 | * If we've got this far and still haven't decided on what version | |
1296 | * we're using then this must be a client side alert we're dealing with | |
1297 | * (we don't allow heartbeats yet). We shouldn't be receiving anything | |
1298 | * other than a ClientHello if we are a server. | |
1299 | */ | |
1300 | s->version = rr->rec_version; | |
1301 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1302 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1303 | goto f_err; | |
1304 | } | |
1305 | ||
0f113f3e MC |
1306 | /* |
1307 | * In case of record types for which we have 'fragment' storage, fill | |
1308 | * that so that we can process the data at a fixed place. | |
1309 | */ | |
1310 | { | |
1311 | unsigned int dest_maxlen = 0; | |
1312 | unsigned char *dest = NULL; | |
1313 | unsigned int *dest_len = NULL; | |
1314 | ||
747e1639 | 1315 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
4aa7389e MC |
1316 | dest_maxlen = sizeof s->rlayer.handshake_fragment; |
1317 | dest = s->rlayer.handshake_fragment; | |
1318 | dest_len = &s->rlayer.handshake_fragment_len; | |
747e1639 | 1319 | } else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
4aa7389e MC |
1320 | dest_maxlen = sizeof s->rlayer.alert_fragment; |
1321 | dest = s->rlayer.alert_fragment; | |
1322 | dest_len = &s->rlayer.alert_fragment_len; | |
0f113f3e | 1323 | } |
b35e9050 | 1324 | |
0f113f3e MC |
1325 | if (dest_maxlen > 0) { |
1326 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
747e1639 MC |
1327 | if (SSL3_RECORD_get_length(rr) < n) |
1328 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
0f113f3e MC |
1329 | |
1330 | /* now move 'n' bytes: */ | |
1331 | while (n-- > 0) { | |
747e1639 MC |
1332 | dest[(*dest_len)++] = |
1333 | SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]; | |
1334 | SSL3_RECORD_add_off(rr, 1); | |
1335 | SSL3_RECORD_add_length(rr, -1); | |
0f113f3e MC |
1336 | } |
1337 | ||
1338 | if (*dest_len < dest_maxlen) | |
1339 | goto start; /* fragment was too small */ | |
1340 | } | |
1341 | } | |
1342 | ||
50e735f9 | 1343 | /*- |
4aa7389e MC |
1344 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
1345 | * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT. | |
50e735f9 MC |
1346 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1347 | */ | |
0f113f3e MC |
1348 | |
1349 | /* If we are a client, check for an incoming 'Hello Request': */ | |
1350 | if ((!s->server) && | |
4aa7389e MC |
1351 | (s->rlayer.handshake_fragment_len >= 4) && |
1352 | (s->rlayer.handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) && | |
0f113f3e | 1353 | (s->session != NULL) && (s->session->cipher != NULL)) { |
4aa7389e | 1354 | s->rlayer.handshake_fragment_len = 0; |
0f113f3e | 1355 | |
4aa7389e MC |
1356 | if ((s->rlayer.handshake_fragment[1] != 0) || |
1357 | (s->rlayer.handshake_fragment[2] != 0) || | |
1358 | (s->rlayer.handshake_fragment[3] != 0)) { | |
0f113f3e MC |
1359 | al = SSL_AD_DECODE_ERROR; |
1360 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_BAD_HELLO_REQUEST); | |
1361 | goto f_err; | |
1362 | } | |
1363 | ||
1364 | if (s->msg_callback) | |
1365 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, | |
4aa7389e | 1366 | s->rlayer.handshake_fragment, 4, s, |
0f113f3e MC |
1367 | s->msg_callback_arg); |
1368 | ||
1369 | if (SSL_is_init_finished(s) && | |
1370 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && | |
1371 | !s->s3->renegotiate) { | |
1372 | ssl3_renegotiate(s); | |
1373 | if (ssl3_renegotiate_check(s)) { | |
1374 | i = s->handshake_func(s); | |
1375 | if (i < 0) | |
1376 | return (i); | |
1377 | if (i == 0) { | |
1378 | SSLerr(SSL_F_SSL3_READ_BYTES, | |
1379 | SSL_R_SSL_HANDSHAKE_FAILURE); | |
1380 | return (-1); | |
1381 | } | |
1382 | ||
1383 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1384 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1385 | /* no read-ahead left? */ |
0f113f3e MC |
1386 | BIO *bio; |
1387 | /* | |
1388 | * In the case where we try to read application data, | |
1389 | * but we trigger an SSL handshake, we return -1 with | |
1390 | * the retry option set. Otherwise renegotiation may | |
1391 | * cause nasty problems in the blocking world | |
1392 | */ | |
1393 | s->rwstate = SSL_READING; | |
1394 | bio = SSL_get_rbio(s); | |
1395 | BIO_clear_retry_flags(bio); | |
1396 | BIO_set_retry_read(bio); | |
1397 | return (-1); | |
1398 | } | |
1399 | } | |
1400 | } | |
1401 | } | |
1402 | /* | |
1403 | * we either finished a handshake or ignored the request, now try | |
1404 | * again to obtain the (application) data we were asked for | |
1405 | */ | |
1406 | goto start; | |
1407 | } | |
1408 | /* | |
1409 | * If we are a server and get a client hello when renegotiation isn't | |
1410 | * allowed send back a no renegotiation alert and carry on. WARNING: | |
1411 | * experimental code, needs reviewing (steve) | |
1412 | */ | |
1413 | if (s->server && | |
1414 | SSL_is_init_finished(s) && | |
1415 | !s->s3->send_connection_binding && | |
1416 | (s->version > SSL3_VERSION) && | |
4aa7389e MC |
1417 | (s->rlayer.handshake_fragment_len >= 4) && |
1418 | (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && | |
0f113f3e MC |
1419 | (s->session != NULL) && (s->session->cipher != NULL) && |
1420 | !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { | |
747e1639 | 1421 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1422 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); |
1423 | goto start; | |
1424 | } | |
4aa7389e MC |
1425 | if (s->rlayer.alert_fragment_len >= 2) { |
1426 | int alert_level = s->rlayer.alert_fragment[0]; | |
1427 | int alert_descr = s->rlayer.alert_fragment[1]; | |
0f113f3e | 1428 | |
4aa7389e | 1429 | s->rlayer.alert_fragment_len = 0; |
0f113f3e MC |
1430 | |
1431 | if (s->msg_callback) | |
1432 | s->msg_callback(0, s->version, SSL3_RT_ALERT, | |
4aa7389e MC |
1433 | s->rlayer.alert_fragment, 2, s, |
1434 | s->msg_callback_arg); | |
0f113f3e MC |
1435 | |
1436 | if (s->info_callback != NULL) | |
1437 | cb = s->info_callback; | |
1438 | else if (s->ctx->info_callback != NULL) | |
1439 | cb = s->ctx->info_callback; | |
1440 | ||
1441 | if (cb != NULL) { | |
1442 | j = (alert_level << 8) | alert_descr; | |
1443 | cb(s, SSL_CB_READ_ALERT, j); | |
1444 | } | |
1445 | ||
fd865cad | 1446 | if (alert_level == SSL3_AL_WARNING) { |
0f113f3e MC |
1447 | s->s3->warn_alert = alert_descr; |
1448 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { | |
1449 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1450 | return (0); | |
1451 | } | |
1452 | /* | |
1453 | * This is a warning but we receive it if we requested | |
1454 | * renegotiation and the peer denied it. Terminate with a fatal | |
1455 | * alert because if application tried to renegotiatie it | |
1456 | * presumably had a good reason and expects it to succeed. In | |
1457 | * future we might have a renegotiation where we don't care if | |
1458 | * the peer refused it where we carry on. | |
1459 | */ | |
1460 | else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { | |
1461 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1462 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); | |
1463 | goto f_err; | |
1464 | } | |
edc032b5 | 1465 | #ifdef SSL_AD_MISSING_SRP_USERNAME |
0f113f3e MC |
1466 | else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME) |
1467 | return (0); | |
edc032b5 | 1468 | #endif |
fd865cad | 1469 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
1470 | char tmp[16]; |
1471 | ||
1472 | s->rwstate = SSL_NOTHING; | |
1473 | s->s3->fatal_alert = alert_descr; | |
1474 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); | |
1475 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
1476 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
1477 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1478 | SSL_CTX_remove_session(s->ctx, s->session); | |
1479 | return (0); | |
1480 | } else { | |
1481 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1482 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1483 | goto f_err; | |
1484 | } | |
1485 | ||
1486 | goto start; | |
1487 | } | |
1488 | ||
1489 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
1490 | * shutdown */ | |
1491 | s->rwstate = SSL_NOTHING; | |
747e1639 | 1492 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1493 | return (0); |
1494 | } | |
1495 | ||
747e1639 | 1496 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
657da85e MC |
1497 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1498 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1499 | goto f_err; | |
0f113f3e MC |
1500 | } |
1501 | ||
1502 | /* | |
1503 | * Unexpected handshake message (Client Hello, or protocol violation) | |
1504 | */ | |
024f543c MC |
1505 | if ((s->rlayer.handshake_fragment_len >= 4) |
1506 | && !ossl_statem_get_in_handshake(s)) { | |
49ae7423 | 1507 | if (SSL_is_init_finished(s) && |
0f113f3e | 1508 | !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) { |
fe3a3291 | 1509 | ossl_statem_set_in_init(s, 1); |
0f113f3e MC |
1510 | s->renegotiate = 1; |
1511 | s->new_session = 1; | |
1512 | } | |
1513 | i = s->handshake_func(s); | |
1514 | if (i < 0) | |
1515 | return (i); | |
1516 | if (i == 0) { | |
1517 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
1518 | return (-1); | |
1519 | } | |
1520 | ||
1521 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
94777c9c | 1522 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1523 | /* no read-ahead left? */ |
0f113f3e MC |
1524 | BIO *bio; |
1525 | /* | |
1526 | * In the case where we try to read application data, but we | |
1527 | * trigger an SSL handshake, we return -1 with the retry | |
1528 | * option set. Otherwise renegotiation may cause nasty | |
1529 | * problems in the blocking world | |
1530 | */ | |
1531 | s->rwstate = SSL_READING; | |
1532 | bio = SSL_get_rbio(s); | |
1533 | BIO_clear_retry_flags(bio); | |
1534 | BIO_set_retry_read(bio); | |
1535 | return (-1); | |
1536 | } | |
1537 | } | |
1538 | goto start; | |
1539 | } | |
1540 | ||
747e1639 | 1541 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1542 | default: |
0f113f3e MC |
1543 | /* |
1544 | * TLS up to v1.1 just ignores unknown message types: TLS v1.2 give | |
1545 | * an unexpected message alert. | |
1546 | */ | |
1547 | if (s->version >= TLS1_VERSION && s->version <= TLS1_1_VERSION) { | |
747e1639 | 1548 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e MC |
1549 | goto start; |
1550 | } | |
0f113f3e MC |
1551 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1552 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1553 | goto f_err; | |
1554 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
1555 | case SSL3_RT_ALERT: | |
1556 | case SSL3_RT_HANDSHAKE: | |
1557 | /* | |
1558 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1559 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1560 | * that should not happen when type != rr->type | |
0f113f3e MC |
1561 | */ |
1562 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1563 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1564 | goto f_err; | |
1565 | case SSL3_RT_APPLICATION_DATA: | |
1566 | /* | |
1567 | * At this point, we were expecting handshake data, but have | |
1568 | * application data. If the library was running inside ssl3_read() | |
1569 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1570 | * application data at this point (session renegotiation not yet | |
1571 | * started), we will indulge it. | |
1572 | */ | |
fe3a3291 | 1573 | if (ossl_statem_app_data_allowed(s)) { |
0f113f3e MC |
1574 | s->s3->in_read_app_data = 2; |
1575 | return (-1); | |
1576 | } else { | |
1577 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1578 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1579 | goto f_err; | |
1580 | } | |
1581 | } | |
1582 | /* not reached */ | |
1583 | ||
1584 | f_err: | |
1585 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
0f113f3e MC |
1586 | return (-1); |
1587 | } | |
d02b48c6 | 1588 | |
14daae5a MC |
1589 | void ssl3_record_sequence_update(unsigned char *seq) |
1590 | { | |
1591 | int i; | |
1592 | ||
1593 | for (i = 7; i >= 0; i--) { | |
1594 | ++seq[i]; | |
1595 | if (seq[i] != 0) | |
1596 | break; | |
1597 | } | |
1598 | } | |
1599 | ||
d45ba43d MC |
1600 | /* |
1601 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1602 | * format and false otherwise. | |
1603 | */ | |
32ec4153 MC |
1604 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1605 | { | |
94777c9c | 1606 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1607 | } |
0f113f3e | 1608 | |
d45ba43d MC |
1609 | /* |
1610 | * Returns the length in bytes of the current rrec | |
1611 | */ | |
b821df5f | 1612 | unsigned int RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1613 | { |
94777c9c | 1614 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1615 | } |