1 /* $OpenBSD: ssl_both.c,v 1.42 2022/02/05 14:54:10 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 */
116
117 #include <limits.h>
118 #include <stdio.h>
119 #include <string.h>
120
121 #include <openssl/buffer.h>
122 #include <openssl/evp.h>
123 #include <openssl/objects.h>
124 #include <openssl/x509.h>
125
126 #include "bytestring.h"
127 #include "dtls_locl.h"
128 #include "ssl_locl.h"
129
130 /*
131 * Send s->internal->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
132 * SSL3_RT_CHANGE_CIPHER_SPEC).
133 */
134 int
ssl3_do_write(SSL * s,int type)135 ssl3_do_write(SSL *s, int type)
136 {
137 int ret;
138
139 ret = ssl3_write_bytes(s, type, &s->internal->init_buf->data[s->internal->init_off],
140 s->internal->init_num);
141 if (ret < 0)
142 return (-1);
143
144 if (type == SSL3_RT_HANDSHAKE)
145 /*
146 * Should not be done for 'Hello Request's, but in that case
147 * we'll ignore the result anyway.
148 */
149 tls1_transcript_record(s,
150 (unsigned char *)&s->internal->init_buf->data[s->internal->init_off], ret);
151
152 if (ret == s->internal->init_num) {
153 ssl_msg_callback(s, 1, type, s->internal->init_buf->data,
154 (size_t)(s->internal->init_off + s->internal->init_num));
155 return (1);
156 }
157
158 s->internal->init_off += ret;
159 s->internal->init_num -= ret;
160
161 return (0);
162 }
163
164 int
ssl3_send_finished(SSL * s,int state_a,int state_b)165 ssl3_send_finished(SSL *s, int state_a, int state_b)
166 {
167 CBB cbb, finished;
168
169 memset(&cbb, 0, sizeof(cbb));
170
171 if (s->s3->hs.state == state_a) {
172 if (!tls12_derive_finished(s))
173 goto err;
174
175 /* Copy finished so we can use it for renegotiation checks. */
176 if (!s->server) {
177 memcpy(s->s3->previous_client_finished,
178 s->s3->hs.finished, s->s3->hs.finished_len);
179 s->s3->previous_client_finished_len =
180 s->s3->hs.finished_len;
181 } else {
182 memcpy(s->s3->previous_server_finished,
183 s->s3->hs.finished, s->s3->hs.finished_len);
184 s->s3->previous_server_finished_len =
185 s->s3->hs.finished_len;
186 }
187
188 if (!ssl3_handshake_msg_start(s, &cbb, &finished,
189 SSL3_MT_FINISHED))
190 goto err;
191 if (!CBB_add_bytes(&finished, s->s3->hs.finished,
192 s->s3->hs.finished_len))
193 goto err;
194 if (!ssl3_handshake_msg_finish(s, &cbb))
195 goto err;
196
197 s->s3->hs.state = state_b;
198 }
199
200 return (ssl3_handshake_write(s));
201
202 err:
203 CBB_cleanup(&cbb);
204
205 return (-1);
206 }
207
208 int
ssl3_get_finished(SSL * s,int a,int b)209 ssl3_get_finished(SSL *s, int a, int b)
210 {
211 int al, md_len, ret;
212 CBS cbs;
213
214 /* should actually be 36+4 :-) */
215 if ((ret = ssl3_get_message(s, a, b, SSL3_MT_FINISHED, 64)) <= 0)
216 return ret;
217
218 /* If this occurs, we have missed a message */
219 if (!s->s3->change_cipher_spec) {
220 al = SSL_AD_UNEXPECTED_MESSAGE;
221 SSLerror(s, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
222 goto fatal_err;
223 }
224 s->s3->change_cipher_spec = 0;
225
226 md_len = TLS1_FINISH_MAC_LENGTH;
227
228 if (s->internal->init_num < 0) {
229 al = SSL_AD_DECODE_ERROR;
230 SSLerror(s, SSL_R_BAD_DIGEST_LENGTH);
231 goto fatal_err;
232 }
233
234 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
235
236 if (s->s3->hs.peer_finished_len != md_len ||
237 CBS_len(&cbs) != md_len) {
238 al = SSL_AD_DECODE_ERROR;
239 SSLerror(s, SSL_R_BAD_DIGEST_LENGTH);
240 goto fatal_err;
241 }
242
243 if (!CBS_mem_equal(&cbs, s->s3->hs.peer_finished, CBS_len(&cbs))) {
244 al = SSL_AD_DECRYPT_ERROR;
245 SSLerror(s, SSL_R_DIGEST_CHECK_FAILED);
246 goto fatal_err;
247 }
248
249 /* Copy finished so we can use it for renegotiation checks. */
250 OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE);
251 if (s->server) {
252 memcpy(s->s3->previous_client_finished,
253 s->s3->hs.peer_finished, md_len);
254 s->s3->previous_client_finished_len = md_len;
255 } else {
256 memcpy(s->s3->previous_server_finished,
257 s->s3->hs.peer_finished, md_len);
258 s->s3->previous_server_finished_len = md_len;
259 }
260
261 return (1);
262 fatal_err:
263 ssl3_send_alert(s, SSL3_AL_FATAL, al);
264 return (0);
265 }
266
267 int
ssl3_send_change_cipher_spec(SSL * s,int a,int b)268 ssl3_send_change_cipher_spec(SSL *s, int a, int b)
269 {
270 size_t outlen;
271 CBB cbb;
272
273 memset(&cbb, 0, sizeof(cbb));
274
275 if (s->s3->hs.state == a) {
276 if (!CBB_init_fixed(&cbb, s->internal->init_buf->data,
277 s->internal->init_buf->length))
278 goto err;
279 if (!CBB_add_u8(&cbb, SSL3_MT_CCS))
280 goto err;
281 if (!CBB_finish(&cbb, NULL, &outlen))
282 goto err;
283
284 if (outlen > INT_MAX)
285 goto err;
286
287 s->internal->init_num = (int)outlen;
288 s->internal->init_off = 0;
289
290 if (SSL_is_dtls(s)) {
291 s->d1->handshake_write_seq =
292 s->d1->next_handshake_write_seq;
293 dtls1_set_message_header_int(s, SSL3_MT_CCS, 0,
294 s->d1->handshake_write_seq, 0, 0);
295 dtls1_buffer_message(s, 1);
296 }
297
298 s->s3->hs.state = b;
299 }
300
301 /* SSL3_ST_CW_CHANGE_B */
302 return ssl3_record_write(s, SSL3_RT_CHANGE_CIPHER_SPEC);
303
304 err:
305 CBB_cleanup(&cbb);
306
307 return -1;
308 }
309
310 static int
ssl3_add_cert(CBB * cbb,X509 * x)311 ssl3_add_cert(CBB *cbb, X509 *x)
312 {
313 unsigned char *data;
314 int cert_len;
315 int ret = 0;
316 CBB cert;
317
318 if ((cert_len = i2d_X509(x, NULL)) < 0)
319 goto err;
320
321 if (!CBB_add_u24_length_prefixed(cbb, &cert))
322 goto err;
323 if (!CBB_add_space(&cert, &data, cert_len))
324 goto err;
325 if (i2d_X509(x, &data) < 0)
326 goto err;
327 if (!CBB_flush(cbb))
328 goto err;
329
330 ret = 1;
331
332 err:
333 return (ret);
334 }
335
336 int
ssl3_output_cert_chain(SSL * s,CBB * cbb,SSL_CERT_PKEY * cpk)337 ssl3_output_cert_chain(SSL *s, CBB *cbb, SSL_CERT_PKEY *cpk)
338 {
339 X509_STORE_CTX *xs_ctx = NULL;
340 STACK_OF(X509) *chain;
341 CBB cert_list;
342 X509 *x;
343 int ret = 0;
344 int i;
345
346 if (!CBB_add_u24_length_prefixed(cbb, &cert_list))
347 goto err;
348
349 /* Send an empty certificate list when no certificate is available. */
350 if (cpk == NULL)
351 goto done;
352
353 if ((chain = cpk->chain) == NULL)
354 chain = s->ctx->extra_certs;
355
356 if (chain != NULL || (s->internal->mode & SSL_MODE_NO_AUTO_CHAIN)) {
357 if (!ssl3_add_cert(&cert_list, cpk->x509))
358 goto err;
359 } else {
360 if ((xs_ctx = X509_STORE_CTX_new()) == NULL)
361 goto err;
362 if (!X509_STORE_CTX_init(xs_ctx, s->ctx->cert_store,
363 cpk->x509, NULL)) {
364 SSLerror(s, ERR_R_X509_LIB);
365 goto err;
366 }
367 X509_VERIFY_PARAM_set_flags(X509_STORE_CTX_get0_param(xs_ctx),
368 X509_V_FLAG_LEGACY_VERIFY);
369 X509_verify_cert(xs_ctx);
370 ERR_clear_error();
371 chain = X509_STORE_CTX_get0_chain(xs_ctx);
372 }
373
374 for (i = 0; i < sk_X509_num(chain); i++) {
375 x = sk_X509_value(chain, i);
376 if (!ssl3_add_cert(&cert_list, x))
377 goto err;
378 }
379
380 done:
381 if (!CBB_flush(cbb))
382 goto err;
383
384 ret = 1;
385
386 err:
387 X509_STORE_CTX_free(xs_ctx);
388
389 return (ret);
390 }
391
392 /*
393 * Obtain handshake message of message type 'mt' (any if mt == -1),
394 * maximum acceptable body length 'max'.
395 * The first four bytes (msg_type and length) are read in state 'st1',
396 * the body is read in state 'stn'.
397 */
398 int
ssl3_get_message(SSL * s,int st1,int stn,int mt,long max)399 ssl3_get_message(SSL *s, int st1, int stn, int mt, long max)
400 {
401 unsigned char *p;
402 uint32_t l;
403 long n;
404 int i, al;
405 CBS cbs;
406 uint8_t u8;
407
408 if (SSL_is_dtls(s))
409 return dtls1_get_message(s, st1, stn, mt, max);
410
411 if (s->s3->hs.tls12.reuse_message) {
412 s->s3->hs.tls12.reuse_message = 0;
413 if ((mt >= 0) && (s->s3->hs.tls12.message_type != mt)) {
414 al = SSL_AD_UNEXPECTED_MESSAGE;
415 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
416 goto fatal_err;
417 }
418 s->internal->init_msg = s->internal->init_buf->data +
419 SSL3_HM_HEADER_LENGTH;
420 s->internal->init_num = (int)s->s3->hs.tls12.message_size;
421 return 1;
422 }
423
424 p = (unsigned char *)s->internal->init_buf->data;
425
426 if (s->s3->hs.state == st1) {
427 int skip_message;
428
429 do {
430 while (s->internal->init_num < SSL3_HM_HEADER_LENGTH) {
431 i = s->method->ssl_read_bytes(s,
432 SSL3_RT_HANDSHAKE, &p[s->internal->init_num],
433 SSL3_HM_HEADER_LENGTH - s->internal->init_num, 0);
434 if (i <= 0) {
435 s->internal->rwstate = SSL_READING;
436 return i;
437 }
438 s->internal->init_num += i;
439 }
440
441 skip_message = 0;
442 if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) {
443 /*
444 * The server may always send 'Hello Request'
445 * messages -- we are doing a handshake anyway
446 * now, so ignore them if their format is
447 * correct. Does not count for 'Finished' MAC.
448 */
449 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) {
450 s->internal->init_num = 0;
451 skip_message = 1;
452
453 ssl_msg_callback(s, 0,
454 SSL3_RT_HANDSHAKE, p,
455 SSL3_HM_HEADER_LENGTH);
456 }
457 }
458 } while (skip_message);
459
460 if ((mt >= 0) && (*p != mt)) {
461 al = SSL_AD_UNEXPECTED_MESSAGE;
462 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
463 goto fatal_err;
464 }
465
466 CBS_init(&cbs, p, SSL3_HM_HEADER_LENGTH);
467 if (!CBS_get_u8(&cbs, &u8) ||
468 !CBS_get_u24(&cbs, &l)) {
469 SSLerror(s, ERR_R_BUF_LIB);
470 goto err;
471 }
472 s->s3->hs.tls12.message_type = u8;
473
474 if (l > (unsigned long)max) {
475 al = SSL_AD_ILLEGAL_PARAMETER;
476 SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE);
477 goto fatal_err;
478 }
479 if (l && !BUF_MEM_grow_clean(s->internal->init_buf,
480 l + SSL3_HM_HEADER_LENGTH)) {
481 SSLerror(s, ERR_R_BUF_LIB);
482 goto err;
483 }
484 s->s3->hs.tls12.message_size = l;
485 s->s3->hs.state = stn;
486
487 s->internal->init_msg = s->internal->init_buf->data +
488 SSL3_HM_HEADER_LENGTH;
489 s->internal->init_num = 0;
490 }
491
492 /* next state (stn) */
493 p = s->internal->init_msg;
494 n = s->s3->hs.tls12.message_size - s->internal->init_num;
495 while (n > 0) {
496 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
497 &p[s->internal->init_num], n, 0);
498 if (i <= 0) {
499 s->internal->rwstate = SSL_READING;
500 return i;
501 }
502 s->internal->init_num += i;
503 n -= i;
504 }
505
506 /* Feed this message into MAC computation. */
507 if (s->internal->mac_packet) {
508 tls1_transcript_record(s, (unsigned char *)s->internal->init_buf->data,
509 s->internal->init_num + SSL3_HM_HEADER_LENGTH);
510
511 ssl_msg_callback(s, 0, SSL3_RT_HANDSHAKE,
512 s->internal->init_buf->data,
513 (size_t)s->internal->init_num + SSL3_HM_HEADER_LENGTH);
514 }
515
516 return 1;
517
518 fatal_err:
519 ssl3_send_alert(s, SSL3_AL_FATAL, al);
520 err:
521 return -1;
522 }
523
524 int
ssl_cert_type(EVP_PKEY * pkey)525 ssl_cert_type(EVP_PKEY *pkey)
526 {
527 if (pkey == NULL)
528 return -1;
529
530 switch (EVP_PKEY_id(pkey)) {
531 case EVP_PKEY_EC:
532 return SSL_PKEY_ECC;
533 case NID_id_GostR3410_2001:
534 case NID_id_GostR3410_2001_cc:
535 return SSL_PKEY_GOST01;
536 case EVP_PKEY_RSA:
537 return SSL_PKEY_RSA;
538 }
539
540 return -1;
541 }
542
543 int
ssl_verify_alarm_type(long type)544 ssl_verify_alarm_type(long type)
545 {
546 int al;
547
548 switch (type) {
549 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
550 case X509_V_ERR_UNABLE_TO_GET_CRL:
551 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
552 al = SSL_AD_UNKNOWN_CA;
553 break;
554 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
555 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
556 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
557 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
558 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
559 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
560 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
561 case X509_V_ERR_CERT_NOT_YET_VALID:
562 case X509_V_ERR_CRL_NOT_YET_VALID:
563 case X509_V_ERR_CERT_UNTRUSTED:
564 case X509_V_ERR_CERT_REJECTED:
565 al = SSL_AD_BAD_CERTIFICATE;
566 break;
567 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
568 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
569 al = SSL_AD_DECRYPT_ERROR;
570 break;
571 case X509_V_ERR_CERT_HAS_EXPIRED:
572 case X509_V_ERR_CRL_HAS_EXPIRED:
573 al = SSL_AD_CERTIFICATE_EXPIRED;
574 break;
575 case X509_V_ERR_CERT_REVOKED:
576 al = SSL_AD_CERTIFICATE_REVOKED;
577 break;
578 case X509_V_ERR_OUT_OF_MEM:
579 al = SSL_AD_INTERNAL_ERROR;
580 break;
581 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
582 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
583 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
584 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
585 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
586 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
587 case X509_V_ERR_INVALID_CA:
588 al = SSL_AD_UNKNOWN_CA;
589 break;
590 case X509_V_ERR_APPLICATION_VERIFICATION:
591 al = SSL_AD_HANDSHAKE_FAILURE;
592 break;
593 case X509_V_ERR_INVALID_PURPOSE:
594 al = SSL_AD_UNSUPPORTED_CERTIFICATE;
595 break;
596 default:
597 al = SSL_AD_CERTIFICATE_UNKNOWN;
598 break;
599 }
600 return (al);
601 }
602
603 int
ssl3_setup_init_buffer(SSL * s)604 ssl3_setup_init_buffer(SSL *s)
605 {
606 BUF_MEM *buf = NULL;
607
608 if (s->internal->init_buf != NULL)
609 return (1);
610
611 if ((buf = BUF_MEM_new()) == NULL)
612 goto err;
613 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH))
614 goto err;
615
616 s->internal->init_buf = buf;
617 return (1);
618
619 err:
620 BUF_MEM_free(buf);
621 return (0);
622 }
623
624 void
ssl3_release_init_buffer(SSL * s)625 ssl3_release_init_buffer(SSL *s)
626 {
627 BUF_MEM_free(s->internal->init_buf);
628 s->internal->init_buf = NULL;
629 s->internal->init_msg = NULL;
630 s->internal->init_num = 0;
631 s->internal->init_off = 0;
632 }
633
634 int
ssl3_setup_read_buffer(SSL * s)635 ssl3_setup_read_buffer(SSL *s)
636 {
637 unsigned char *p;
638 size_t len, align, headerlen;
639
640 if (SSL_is_dtls(s))
641 headerlen = DTLS1_RT_HEADER_LENGTH;
642 else
643 headerlen = SSL3_RT_HEADER_LENGTH;
644
645 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
646
647 if (s->s3->rbuf.buf == NULL) {
648 len = SSL3_RT_MAX_PLAIN_LENGTH +
649 SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
650 if ((p = calloc(1, len)) == NULL)
651 goto err;
652 s->s3->rbuf.buf = p;
653 s->s3->rbuf.len = len;
654 }
655
656 s->internal->packet = s->s3->rbuf.buf;
657 return 1;
658
659 err:
660 SSLerror(s, ERR_R_MALLOC_FAILURE);
661 return 0;
662 }
663
664 int
ssl3_setup_write_buffer(SSL * s)665 ssl3_setup_write_buffer(SSL *s)
666 {
667 unsigned char *p;
668 size_t len, align, headerlen;
669
670 if (SSL_is_dtls(s))
671 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
672 else
673 headerlen = SSL3_RT_HEADER_LENGTH;
674
675 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
676
677 if (s->s3->wbuf.buf == NULL) {
678 len = s->max_send_fragment +
679 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
680 if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
681 len += headerlen + align +
682 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
683
684 if ((p = calloc(1, len)) == NULL)
685 goto err;
686 s->s3->wbuf.buf = p;
687 s->s3->wbuf.len = len;
688 }
689
690 return 1;
691
692 err:
693 SSLerror(s, ERR_R_MALLOC_FAILURE);
694 return 0;
695 }
696
697 int
ssl3_setup_buffers(SSL * s)698 ssl3_setup_buffers(SSL *s)
699 {
700 if (!ssl3_setup_read_buffer(s))
701 return 0;
702 if (!ssl3_setup_write_buffer(s))
703 return 0;
704 return 1;
705 }
706
707 void
ssl3_release_buffer(SSL3_BUFFER_INTERNAL * b)708 ssl3_release_buffer(SSL3_BUFFER_INTERNAL *b)
709 {
710 freezero(b->buf, b->len);
711 b->buf = NULL;
712 b->len = 0;
713 }
714
715 void
ssl3_release_read_buffer(SSL * s)716 ssl3_release_read_buffer(SSL *s)
717 {
718 ssl3_release_buffer(&s->s3->rbuf);
719 }
720
721 void
ssl3_release_write_buffer(SSL * s)722 ssl3_release_write_buffer(SSL *s)
723 {
724 ssl3_release_buffer(&s->s3->wbuf);
725 }
726