1 /* $OpenBSD: ssl_both.c,v 1.35 2021/09/03 13:19:12 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 (S3I(s)->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(S3I(s)->previous_client_finished,
178 S3I(s)->hs.finished, S3I(s)->hs.finished_len);
179 S3I(s)->previous_client_finished_len =
180 S3I(s)->hs.finished_len;
181 } else {
182 memcpy(S3I(s)->previous_server_finished,
183 S3I(s)->hs.finished, S3I(s)->hs.finished_len);
184 S3I(s)->previous_server_finished_len =
185 S3I(s)->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, S3I(s)->hs.finished,
192 S3I(s)->hs.finished_len))
193 goto err;
194 if (!ssl3_handshake_msg_finish(s, &cbb))
195 goto err;
196
197 S3I(s)->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, ok, md_len;
212 long n;
213 CBS cbs;
214
215 /* should actually be 36+4 :-) */
216 n = ssl3_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok);
217 if (!ok)
218 return ((int)n);
219
220 /* If this occurs, we have missed a message */
221 if (!S3I(s)->change_cipher_spec) {
222 al = SSL_AD_UNEXPECTED_MESSAGE;
223 SSLerror(s, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
224 goto fatal_err;
225 }
226 S3I(s)->change_cipher_spec = 0;
227
228 md_len = TLS1_FINISH_MAC_LENGTH;
229
230 if (n < 0) {
231 al = SSL_AD_DECODE_ERROR;
232 SSLerror(s, SSL_R_BAD_DIGEST_LENGTH);
233 goto fatal_err;
234 }
235
236 CBS_init(&cbs, s->internal->init_msg, n);
237
238 if (S3I(s)->hs.peer_finished_len != md_len ||
239 CBS_len(&cbs) != md_len) {
240 al = SSL_AD_DECODE_ERROR;
241 SSLerror(s, SSL_R_BAD_DIGEST_LENGTH);
242 goto fatal_err;
243 }
244
245 if (!CBS_mem_equal(&cbs, S3I(s)->hs.peer_finished, CBS_len(&cbs))) {
246 al = SSL_AD_DECRYPT_ERROR;
247 SSLerror(s, SSL_R_DIGEST_CHECK_FAILED);
248 goto fatal_err;
249 }
250
251 /* Copy finished so we can use it for renegotiation checks. */
252 OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE);
253 if (s->server) {
254 memcpy(S3I(s)->previous_client_finished,
255 S3I(s)->hs.peer_finished, md_len);
256 S3I(s)->previous_client_finished_len = md_len;
257 } else {
258 memcpy(S3I(s)->previous_server_finished,
259 S3I(s)->hs.peer_finished, md_len);
260 S3I(s)->previous_server_finished_len = md_len;
261 }
262
263 return (1);
264 fatal_err:
265 ssl3_send_alert(s, SSL3_AL_FATAL, al);
266 return (0);
267 }
268
269 int
ssl3_send_change_cipher_spec(SSL * s,int a,int b)270 ssl3_send_change_cipher_spec(SSL *s, int a, int b)
271 {
272 size_t outlen;
273 CBB cbb;
274
275 memset(&cbb, 0, sizeof(cbb));
276
277 if (S3I(s)->hs.state == a) {
278 if (!CBB_init_fixed(&cbb, s->internal->init_buf->data,
279 s->internal->init_buf->length))
280 goto err;
281 if (!CBB_add_u8(&cbb, SSL3_MT_CCS))
282 goto err;
283 if (!CBB_finish(&cbb, NULL, &outlen))
284 goto err;
285
286 if (outlen > INT_MAX)
287 goto err;
288
289 s->internal->init_num = (int)outlen;
290 s->internal->init_off = 0;
291
292 if (SSL_is_dtls(s)) {
293 D1I(s)->handshake_write_seq =
294 D1I(s)->next_handshake_write_seq;
295 dtls1_set_message_header_int(s, SSL3_MT_CCS, 0,
296 D1I(s)->handshake_write_seq, 0, 0);
297 dtls1_buffer_message(s, 1);
298 }
299
300 S3I(s)->hs.state = b;
301 }
302
303 /* SSL3_ST_CW_CHANGE_B */
304 return ssl3_record_write(s, SSL3_RT_CHANGE_CIPHER_SPEC);
305
306 err:
307 CBB_cleanup(&cbb);
308
309 return -1;
310 }
311
312 static int
ssl3_add_cert(CBB * cbb,X509 * x)313 ssl3_add_cert(CBB *cbb, X509 *x)
314 {
315 unsigned char *data;
316 int cert_len;
317 int ret = 0;
318 CBB cert;
319
320 if ((cert_len = i2d_X509(x, NULL)) < 0)
321 goto err;
322
323 if (!CBB_add_u24_length_prefixed(cbb, &cert))
324 goto err;
325 if (!CBB_add_space(&cert, &data, cert_len))
326 goto err;
327 if (i2d_X509(x, &data) < 0)
328 goto err;
329 if (!CBB_flush(cbb))
330 goto err;
331
332 ret = 1;
333
334 err:
335 return (ret);
336 }
337
338 int
ssl3_output_cert_chain(SSL * s,CBB * cbb,CERT_PKEY * cpk)339 ssl3_output_cert_chain(SSL *s, CBB *cbb, CERT_PKEY *cpk)
340 {
341 X509_STORE_CTX *xs_ctx = NULL;
342 STACK_OF(X509) *chain;
343 CBB cert_list;
344 X509 *x;
345 int ret = 0;
346 int i;
347
348 if (!CBB_add_u24_length_prefixed(cbb, &cert_list))
349 goto err;
350
351 /* Send an empty certificate list when no certificate is available. */
352 if (cpk == NULL)
353 goto done;
354
355 if ((chain = cpk->chain) == NULL)
356 chain = s->ctx->extra_certs;
357
358 if (chain != NULL || (s->internal->mode & SSL_MODE_NO_AUTO_CHAIN)) {
359 if (!ssl3_add_cert(&cert_list, cpk->x509))
360 goto err;
361 } else {
362 if ((xs_ctx = X509_STORE_CTX_new()) == NULL)
363 goto err;
364 if (!X509_STORE_CTX_init(xs_ctx, s->ctx->cert_store,
365 cpk->x509, NULL)) {
366 SSLerror(s, ERR_R_X509_LIB);
367 goto err;
368 }
369 X509_VERIFY_PARAM_set_flags(X509_STORE_CTX_get0_param(xs_ctx),
370 X509_V_FLAG_LEGACY_VERIFY);
371 X509_verify_cert(xs_ctx);
372 ERR_clear_error();
373 chain = xs_ctx->chain;
374 }
375
376 for (i = 0; i < sk_X509_num(chain); i++) {
377 x = sk_X509_value(chain, i);
378 if (!ssl3_add_cert(&cert_list, x))
379 goto err;
380 }
381
382 done:
383 if (!CBB_flush(cbb))
384 goto err;
385
386 ret = 1;
387
388 err:
389 X509_STORE_CTX_free(xs_ctx);
390
391 return (ret);
392 }
393
394 /*
395 * Obtain handshake message of message type 'mt' (any if mt == -1),
396 * maximum acceptable body length 'max'.
397 * The first four bytes (msg_type and length) are read in state 'st1',
398 * the body is read in state 'stn'.
399 */
400 long
ssl3_get_message(SSL * s,int st1,int stn,int mt,long max,int * ok)401 ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
402 {
403 unsigned char *p;
404 uint32_t l;
405 long n;
406 int i, al;
407 CBS cbs;
408 uint8_t u8;
409
410 if (SSL_is_dtls(s))
411 return (dtls1_get_message(s, st1, stn, mt, max, ok));
412
413 if (S3I(s)->hs.tls12.reuse_message) {
414 S3I(s)->hs.tls12.reuse_message = 0;
415 if ((mt >= 0) && (S3I(s)->hs.tls12.message_type != mt)) {
416 al = SSL_AD_UNEXPECTED_MESSAGE;
417 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
418 goto fatal_err;
419 }
420 *ok = 1;
421 s->internal->init_msg = s->internal->init_buf->data +
422 SSL3_HM_HEADER_LENGTH;
423 s->internal->init_num = (int)S3I(s)->hs.tls12.message_size;
424 return s->internal->init_num;
425 }
426
427 p = (unsigned char *)s->internal->init_buf->data;
428
429 if (S3I(s)->hs.state == st1) {
430 int skip_message;
431
432 do {
433 while (s->internal->init_num < SSL3_HM_HEADER_LENGTH) {
434 i = s->method->ssl_read_bytes(s,
435 SSL3_RT_HANDSHAKE, &p[s->internal->init_num],
436 SSL3_HM_HEADER_LENGTH - s->internal->init_num, 0);
437 if (i <= 0) {
438 s->internal->rwstate = SSL_READING;
439 *ok = 0;
440 return i;
441 }
442 s->internal->init_num += i;
443 }
444
445 skip_message = 0;
446 if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) {
447 /*
448 * The server may always send 'Hello Request'
449 * messages -- we are doing a handshake anyway
450 * now, so ignore them if their format is
451 * correct. Does not count for 'Finished' MAC.
452 */
453 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) {
454 s->internal->init_num = 0;
455 skip_message = 1;
456
457 ssl_msg_callback(s, 0,
458 SSL3_RT_HANDSHAKE, p,
459 SSL3_HM_HEADER_LENGTH);
460 }
461 }
462 } while (skip_message);
463
464 if ((mt >= 0) && (*p != mt)) {
465 al = SSL_AD_UNEXPECTED_MESSAGE;
466 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
467 goto fatal_err;
468 }
469
470 CBS_init(&cbs, p, SSL3_HM_HEADER_LENGTH);
471 if (!CBS_get_u8(&cbs, &u8) ||
472 !CBS_get_u24(&cbs, &l)) {
473 SSLerror(s, ERR_R_BUF_LIB);
474 goto err;
475 }
476 S3I(s)->hs.tls12.message_type = u8;
477
478 if (l > (unsigned long)max) {
479 al = SSL_AD_ILLEGAL_PARAMETER;
480 SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE);
481 goto fatal_err;
482 }
483 if (l && !BUF_MEM_grow_clean(s->internal->init_buf,
484 l + SSL3_HM_HEADER_LENGTH)) {
485 SSLerror(s, ERR_R_BUF_LIB);
486 goto err;
487 }
488 S3I(s)->hs.tls12.message_size = l;
489 S3I(s)->hs.state = stn;
490
491 s->internal->init_msg = s->internal->init_buf->data +
492 SSL3_HM_HEADER_LENGTH;
493 s->internal->init_num = 0;
494 }
495
496 /* next state (stn) */
497 p = s->internal->init_msg;
498 n = S3I(s)->hs.tls12.message_size - s->internal->init_num;
499 while (n > 0) {
500 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
501 &p[s->internal->init_num], n, 0);
502 if (i <= 0) {
503 s->internal->rwstate = SSL_READING;
504 *ok = 0;
505 return i;
506 }
507 s->internal->init_num += i;
508 n -= i;
509 }
510
511 /* Feed this message into MAC computation. */
512 if (s->internal->mac_packet) {
513 tls1_transcript_record(s, (unsigned char *)s->internal->init_buf->data,
514 s->internal->init_num + SSL3_HM_HEADER_LENGTH);
515
516 ssl_msg_callback(s, 0, SSL3_RT_HANDSHAKE,
517 s->internal->init_buf->data,
518 (size_t)s->internal->init_num + SSL3_HM_HEADER_LENGTH);
519 }
520
521 *ok = 1;
522 return (s->internal->init_num);
523
524 fatal_err:
525 ssl3_send_alert(s, SSL3_AL_FATAL, al);
526 err:
527 *ok = 0;
528 return (-1);
529 }
530
531 int
ssl_cert_type(X509 * x,EVP_PKEY * pkey)532 ssl_cert_type(X509 *x, EVP_PKEY *pkey)
533 {
534 EVP_PKEY *pk;
535 int ret = -1, i;
536
537 if (pkey == NULL)
538 pk = X509_get_pubkey(x);
539 else
540 pk = pkey;
541 if (pk == NULL)
542 goto err;
543
544 i = pk->type;
545 if (i == EVP_PKEY_RSA) {
546 ret = SSL_PKEY_RSA;
547 } else if (i == EVP_PKEY_EC) {
548 ret = SSL_PKEY_ECC;
549 } else if (i == NID_id_GostR3410_2001 ||
550 i == NID_id_GostR3410_2001_cc) {
551 ret = SSL_PKEY_GOST01;
552 }
553
554 err:
555 if (!pkey)
556 EVP_PKEY_free(pk);
557 return (ret);
558 }
559
560 int
ssl_verify_alarm_type(long type)561 ssl_verify_alarm_type(long type)
562 {
563 int al;
564
565 switch (type) {
566 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
567 case X509_V_ERR_UNABLE_TO_GET_CRL:
568 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
569 al = SSL_AD_UNKNOWN_CA;
570 break;
571 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
572 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
573 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
574 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
575 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
576 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
577 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
578 case X509_V_ERR_CERT_NOT_YET_VALID:
579 case X509_V_ERR_CRL_NOT_YET_VALID:
580 case X509_V_ERR_CERT_UNTRUSTED:
581 case X509_V_ERR_CERT_REJECTED:
582 al = SSL_AD_BAD_CERTIFICATE;
583 break;
584 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
585 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
586 al = SSL_AD_DECRYPT_ERROR;
587 break;
588 case X509_V_ERR_CERT_HAS_EXPIRED:
589 case X509_V_ERR_CRL_HAS_EXPIRED:
590 al = SSL_AD_CERTIFICATE_EXPIRED;
591 break;
592 case X509_V_ERR_CERT_REVOKED:
593 al = SSL_AD_CERTIFICATE_REVOKED;
594 break;
595 case X509_V_ERR_OUT_OF_MEM:
596 al = SSL_AD_INTERNAL_ERROR;
597 break;
598 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
599 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
600 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
601 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
602 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
603 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
604 case X509_V_ERR_INVALID_CA:
605 al = SSL_AD_UNKNOWN_CA;
606 break;
607 case X509_V_ERR_APPLICATION_VERIFICATION:
608 al = SSL_AD_HANDSHAKE_FAILURE;
609 break;
610 case X509_V_ERR_INVALID_PURPOSE:
611 al = SSL_AD_UNSUPPORTED_CERTIFICATE;
612 break;
613 default:
614 al = SSL_AD_CERTIFICATE_UNKNOWN;
615 break;
616 }
617 return (al);
618 }
619
620 int
ssl3_setup_init_buffer(SSL * s)621 ssl3_setup_init_buffer(SSL *s)
622 {
623 BUF_MEM *buf = NULL;
624
625 if (s->internal->init_buf != NULL)
626 return (1);
627
628 if ((buf = BUF_MEM_new()) == NULL)
629 goto err;
630 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH))
631 goto err;
632
633 s->internal->init_buf = buf;
634 return (1);
635
636 err:
637 BUF_MEM_free(buf);
638 return (0);
639 }
640
641 void
ssl3_release_init_buffer(SSL * s)642 ssl3_release_init_buffer(SSL *s)
643 {
644 BUF_MEM_free(s->internal->init_buf);
645 s->internal->init_buf = NULL;
646 s->internal->init_msg = NULL;
647 s->internal->init_num = 0;
648 s->internal->init_off = 0;
649 }
650
651 int
ssl3_setup_read_buffer(SSL * s)652 ssl3_setup_read_buffer(SSL *s)
653 {
654 unsigned char *p;
655 size_t len, align, headerlen;
656
657 if (SSL_is_dtls(s))
658 headerlen = DTLS1_RT_HEADER_LENGTH;
659 else
660 headerlen = SSL3_RT_HEADER_LENGTH;
661
662 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
663
664 if (S3I(s)->rbuf.buf == NULL) {
665 len = SSL3_RT_MAX_PLAIN_LENGTH +
666 SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
667 if ((p = calloc(1, len)) == NULL)
668 goto err;
669 S3I(s)->rbuf.buf = p;
670 S3I(s)->rbuf.len = len;
671 }
672
673 s->internal->packet = S3I(s)->rbuf.buf;
674 return 1;
675
676 err:
677 SSLerror(s, ERR_R_MALLOC_FAILURE);
678 return 0;
679 }
680
681 int
ssl3_setup_write_buffer(SSL * s)682 ssl3_setup_write_buffer(SSL *s)
683 {
684 unsigned char *p;
685 size_t len, align, headerlen;
686
687 if (SSL_is_dtls(s))
688 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
689 else
690 headerlen = SSL3_RT_HEADER_LENGTH;
691
692 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
693
694 if (S3I(s)->wbuf.buf == NULL) {
695 len = s->max_send_fragment +
696 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
697 if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
698 len += headerlen + align +
699 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
700
701 if ((p = calloc(1, len)) == NULL)
702 goto err;
703 S3I(s)->wbuf.buf = p;
704 S3I(s)->wbuf.len = len;
705 }
706
707 return 1;
708
709 err:
710 SSLerror(s, ERR_R_MALLOC_FAILURE);
711 return 0;
712 }
713
714 int
ssl3_setup_buffers(SSL * s)715 ssl3_setup_buffers(SSL *s)
716 {
717 if (!ssl3_setup_read_buffer(s))
718 return 0;
719 if (!ssl3_setup_write_buffer(s))
720 return 0;
721 return 1;
722 }
723
724 void
ssl3_release_buffer(SSL3_BUFFER_INTERNAL * b)725 ssl3_release_buffer(SSL3_BUFFER_INTERNAL *b)
726 {
727 freezero(b->buf, b->len);
728 b->buf = NULL;
729 b->len = 0;
730 }
731
732 void
ssl3_release_read_buffer(SSL * s)733 ssl3_release_read_buffer(SSL *s)
734 {
735 ssl3_release_buffer(&S3I(s)->rbuf);
736 }
737
738 void
ssl3_release_write_buffer(SSL * s)739 ssl3_release_write_buffer(SSL *s)
740 {
741 ssl3_release_buffer(&S3I(s)->wbuf);
742 }
743