etc/services - sync with NetBSD-8
[minix.git] / crypto / external / bsd / openssl / dist / ssl / s3_both.c
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1 /* ssl/s3_both.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
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.
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).
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.
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)"
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.
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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.
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/)"
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.
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.
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/)"
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 * ====================================================================
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).
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.
117 #include <limits.h>
118 #include <string.h>
119 #include <stdio.h>
120 #include "ssl_locl.h"
121 #include <openssl/buffer.h>
122 #include <openssl/rand.h>
123 #include <openssl/objects.h>
124 #include <openssl/evp.h>
125 #include <openssl/x509.h>
128 * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
129 * SSL3_RT_CHANGE_CIPHER_SPEC)
131 int ssl3_do_write(SSL *s, int type)
133 int ret;
135 ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off],
136 s->init_num);
137 if (ret < 0)
138 return (-1);
139 if (type == SSL3_RT_HANDSHAKE)
141 * should not be done for 'Hello Request's, but in that case we'll
142 * ignore the result anyway
144 ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off],
145 ret);
147 if (ret == s->init_num) {
148 if (s->msg_callback)
149 s->msg_callback(1, s->version, type, s->init_buf->data,
150 (size_t)(s->init_off + s->init_num), s,
151 s->msg_callback_arg);
152 return (1);
154 s->init_off += ret;
155 s->init_num -= ret;
156 return (0);
159 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
161 unsigned char *p, *d;
162 int i;
163 unsigned long l;
165 if (s->state == a) {
166 d = (unsigned char *)s->init_buf->data;
167 p = &(d[4]);
169 i = s->method->ssl3_enc->final_finish_mac(s,
170 sender, slen,
171 s->s3->tmp.finish_md);
172 if (i <= 0)
173 return 0;
174 s->s3->tmp.finish_md_len = i;
175 memcpy(p, s->s3->tmp.finish_md, i);
176 p += i;
177 l = i;
180 * Copy the finished so we can use it for renegotiation checks
182 if (s->type == SSL_ST_CONNECT) {
183 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
184 memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i);
185 s->s3->previous_client_finished_len = i;
186 } else {
187 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
188 memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i);
189 s->s3->previous_server_finished_len = i;
192 #ifdef OPENSSL_SYS_WIN16
194 * MSVC 1.5 does not clear the top bytes of the word unless I do
195 * this.
197 l &= 0xffff;
198 #endif
200 *(d++) = SSL3_MT_FINISHED;
201 l2n3(l, d);
202 s->init_num = (int)l + 4;
203 s->init_off = 0;
205 s->state = b;
208 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
209 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
212 #ifndef OPENSSL_NO_NEXTPROTONEG
214 * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
215 * to far.
217 static void ssl3_take_mac(SSL *s)
219 const char *sender;
220 int slen;
222 * If no new cipher setup return immediately: other functions will set
223 * the appropriate error.
225 if (s->s3->tmp.new_cipher == NULL)
226 return;
227 if (s->state & SSL_ST_CONNECT) {
228 sender = s->method->ssl3_enc->server_finished_label;
229 slen = s->method->ssl3_enc->server_finished_label_len;
230 } else {
231 sender = s->method->ssl3_enc->client_finished_label;
232 slen = s->method->ssl3_enc->client_finished_label_len;
235 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
236 sender,
237 slen,
238 s->s3->tmp.peer_finish_md);
240 #endif
242 int ssl3_get_finished(SSL *s, int a, int b)
244 int al, i, ok;
245 long n;
246 unsigned char *p;
248 #ifdef OPENSSL_NO_NEXTPROTONEG
250 * the mac has already been generated when we received the change cipher
251 * spec message and is in s->s3->tmp.peer_finish_md.
253 #endif
255 /* 64 argument should actually be 36+4 :-) */
256 n = s->method->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok);
258 if (!ok)
259 return ((int)n);
261 /* If this occurs, we have missed a message */
262 if (!s->s3->change_cipher_spec) {
263 al = SSL_AD_UNEXPECTED_MESSAGE;
264 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
265 goto f_err;
267 s->s3->change_cipher_spec = 0;
269 p = (unsigned char *)s->init_msg;
270 i = s->s3->tmp.peer_finish_md_len;
272 if (i != n) {
273 al = SSL_AD_DECODE_ERROR;
274 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH);
275 goto f_err;
278 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) {
279 al = SSL_AD_DECRYPT_ERROR;
280 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_DIGEST_CHECK_FAILED);
281 goto f_err;
285 * Copy the finished so we can use it for renegotiation checks
287 if (s->type == SSL_ST_ACCEPT) {
288 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
289 memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i);
290 s->s3->previous_client_finished_len = i;
291 } else {
292 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
293 memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i);
294 s->s3->previous_server_finished_len = i;
297 return (1);
298 f_err:
299 ssl3_send_alert(s, SSL3_AL_FATAL, al);
300 return (0);
304 * for these 2 messages, we need to
305 * ssl->enc_read_ctx re-init
306 * ssl->s3->read_sequence zero
307 * ssl->s3->read_mac_secret re-init
308 * ssl->session->read_sym_enc assign
309 * ssl->session->read_compression assign
310 * ssl->session->read_hash assign
312 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
314 unsigned char *p;
316 if (s->state == a) {
317 p = (unsigned char *)s->init_buf->data;
318 *p = SSL3_MT_CCS;
319 s->init_num = 1;
320 s->init_off = 0;
322 s->state = b;
325 /* SSL3_ST_CW_CHANGE_B */
326 return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC));
329 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
331 int n;
332 unsigned char *p;
334 n = i2d_X509(x, NULL);
335 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
336 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
337 return (-1);
339 p = (unsigned char *)&(buf->data[*l]);
340 l2n3(n, p);
341 i2d_X509(x, &p);
342 *l += n + 3;
344 return (0);
347 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
349 unsigned char *p;
350 int i;
351 unsigned long l = 7;
352 BUF_MEM *buf;
353 int no_chain;
355 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
356 no_chain = 1;
357 else
358 no_chain = 0;
360 /* TLSv1 sends a chain with nothing in it, instead of an alert */
361 buf = s->init_buf;
362 if (!BUF_MEM_grow_clean(buf, 10)) {
363 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_BUF_LIB);
364 return (0);
366 if (x != NULL) {
367 if (no_chain) {
368 if (ssl3_add_cert_to_buf(buf, &l, x))
369 return (0);
370 } else {
371 X509_STORE_CTX xs_ctx;
373 if (!X509_STORE_CTX_init(&xs_ctx, s->ctx->cert_store, x, NULL)) {
374 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_X509_LIB);
375 return (0);
377 X509_verify_cert(&xs_ctx);
378 /* Don't leave errors in the queue */
379 ERR_clear_error();
380 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
381 x = sk_X509_value(xs_ctx.chain, i);
383 if (ssl3_add_cert_to_buf(buf, &l, x)) {
384 X509_STORE_CTX_cleanup(&xs_ctx);
385 return 0;
388 X509_STORE_CTX_cleanup(&xs_ctx);
391 /* Thawte special :-) */
392 for (i = 0; i < sk_X509_num(s->ctx->extra_certs); i++) {
393 x = sk_X509_value(s->ctx->extra_certs, i);
394 if (ssl3_add_cert_to_buf(buf, &l, x))
395 return (0);
398 l -= 7;
399 p = (unsigned char *)&(buf->data[4]);
400 l2n3(l, p);
401 l += 3;
402 p = (unsigned char *)&(buf->data[0]);
403 *(p++) = SSL3_MT_CERTIFICATE;
404 l2n3(l, p);
405 l += 4;
406 return (l);
410 * Obtain handshake message of message type 'mt' (any if mt == -1), maximum
411 * acceptable body length 'max'. The first four bytes (msg_type and length)
412 * are read in state 'st1', the body is read in state 'stn'.
414 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
416 unsigned char *p;
417 unsigned long l;
418 long n;
419 int i, al;
421 if (s->s3->tmp.reuse_message) {
422 s->s3->tmp.reuse_message = 0;
423 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) {
424 al = SSL_AD_UNEXPECTED_MESSAGE;
425 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
426 goto f_err;
428 *ok = 1;
429 s->state = stn;
430 s->init_msg = s->init_buf->data + 4;
431 s->init_num = (int)s->s3->tmp.message_size;
432 return s->init_num;
435 p = (unsigned char *)s->init_buf->data;
437 if (s->state == st1) { /* s->init_num < 4 */
438 int skip_message;
440 do {
441 while (s->init_num < 4) {
442 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
443 &p[s->init_num],
444 4 - s->init_num, 0);
445 if (i <= 0) {
446 s->rwstate = SSL_READING;
447 *ok = 0;
448 return i;
450 s->init_num += i;
453 skip_message = 0;
454 if (!s->server)
455 if (p[0] == SSL3_MT_HELLO_REQUEST)
457 * The server may always send 'Hello Request' messages --
458 * we are doing a handshake anyway now, so ignore them if
459 * their format is correct. Does not count for 'Finished'
460 * MAC.
462 if (p[1] == 0 && p[2] == 0 && p[3] == 0) {
463 s->init_num = 0;
464 skip_message = 1;
466 if (s->msg_callback)
467 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
468 p, 4, s, s->msg_callback_arg);
471 while (skip_message);
473 /* s->init_num == 4 */
475 if ((mt >= 0) && (*p != mt)) {
476 al = SSL_AD_UNEXPECTED_MESSAGE;
477 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
478 goto f_err;
480 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
481 (st1 == SSL3_ST_SR_CERT_A) && (stn == SSL3_ST_SR_CERT_B)) {
483 * At this point we have got an MS SGC second client hello (maybe
484 * we should always allow the client to start a new handshake?).
485 * We need to restart the mac. Don't increment
486 * {num,total}_renegotiations because we have not completed the
487 * handshake.
489 ssl3_init_finished_mac(s);
492 s->s3->tmp.message_type = *(p++);
494 n2l3(p, l);
495 if (l > (unsigned long)max) {
496 al = SSL_AD_ILLEGAL_PARAMETER;
497 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE);
498 goto f_err;
500 if (l > (INT_MAX - 4)) { /* BUF_MEM_grow takes an 'int' parameter */
501 al = SSL_AD_ILLEGAL_PARAMETER;
502 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE);
503 goto f_err;
505 if (l && !BUF_MEM_grow_clean(s->init_buf, (int)l + 4)) {
506 SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB);
507 goto err;
509 s->s3->tmp.message_size = l;
510 s->state = stn;
512 s->init_msg = s->init_buf->data + 4;
513 s->init_num = 0;
516 /* next state (stn) */
517 p = s->init_msg;
518 n = s->s3->tmp.message_size - s->init_num;
519 while (n > 0) {
520 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->init_num],
521 n, 0);
522 if (i <= 0) {
523 s->rwstate = SSL_READING;
524 *ok = 0;
525 return i;
527 s->init_num += i;
528 n -= i;
531 #ifndef OPENSSL_NO_NEXTPROTONEG
533 * If receiving Finished, record MAC of prior handshake messages for
534 * Finished verification.
536 if (*s->init_buf->data == SSL3_MT_FINISHED)
537 ssl3_take_mac(s);
538 #endif
540 /* Feed this message into MAC computation. */
541 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
542 if (s->msg_callback)
543 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
544 (size_t)s->init_num + 4, s, s->msg_callback_arg);
545 *ok = 1;
546 return s->init_num;
547 f_err:
548 ssl3_send_alert(s, SSL3_AL_FATAL, al);
549 err:
550 *ok = 0;
551 return (-1);
554 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
556 EVP_PKEY *pk;
557 int ret = -1, i;
559 if (pkey == NULL)
560 pk = X509_get_pubkey(x);
561 else
562 pk = pkey;
563 if (pk == NULL)
564 goto err;
566 i = pk->type;
567 if (i == EVP_PKEY_RSA) {
568 ret = SSL_PKEY_RSA_ENC;
569 } else if (i == EVP_PKEY_DSA) {
570 ret = SSL_PKEY_DSA_SIGN;
572 #ifndef OPENSSL_NO_EC
573 else if (i == EVP_PKEY_EC) {
574 ret = SSL_PKEY_ECC;
576 #endif
577 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) {
578 ret = SSL_PKEY_GOST94;
579 } else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) {
580 ret = SSL_PKEY_GOST01;
582 err:
583 if (!pkey)
584 EVP_PKEY_free(pk);
585 return (ret);
588 int ssl_verify_alarm_type(long type)
590 int al;
592 switch (type) {
593 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
594 case X509_V_ERR_UNABLE_TO_GET_CRL:
595 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
596 al = SSL_AD_UNKNOWN_CA;
597 break;
598 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
599 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
600 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
601 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
602 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
603 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
604 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
605 case X509_V_ERR_CERT_NOT_YET_VALID:
606 case X509_V_ERR_CRL_NOT_YET_VALID:
607 case X509_V_ERR_CERT_UNTRUSTED:
608 case X509_V_ERR_CERT_REJECTED:
609 al = SSL_AD_BAD_CERTIFICATE;
610 break;
611 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
612 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
613 al = SSL_AD_DECRYPT_ERROR;
614 break;
615 case X509_V_ERR_CERT_HAS_EXPIRED:
616 case X509_V_ERR_CRL_HAS_EXPIRED:
617 al = SSL_AD_CERTIFICATE_EXPIRED;
618 break;
619 case X509_V_ERR_CERT_REVOKED:
620 al = SSL_AD_CERTIFICATE_REVOKED;
621 break;
622 case X509_V_ERR_OUT_OF_MEM:
623 al = SSL_AD_INTERNAL_ERROR;
624 break;
625 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
626 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
627 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
628 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
629 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
630 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
631 case X509_V_ERR_INVALID_CA:
632 al = SSL_AD_UNKNOWN_CA;
633 break;
634 case X509_V_ERR_APPLICATION_VERIFICATION:
635 al = SSL_AD_HANDSHAKE_FAILURE;
636 break;
637 case X509_V_ERR_INVALID_PURPOSE:
638 al = SSL_AD_UNSUPPORTED_CERTIFICATE;
639 break;
640 default:
641 al = SSL_AD_CERTIFICATE_UNKNOWN;
642 break;
644 return (al);
647 #ifndef OPENSSL_NO_BUF_FREELISTS
649 * On some platforms, malloc() performance is bad enough that you can't just
650 * free() and malloc() buffers all the time, so we need to use freelists from
651 * unused buffers. Currently, each freelist holds memory chunks of only a
652 * given size (list->chunklen); other sized chunks are freed and malloced.
653 * This doesn't help much if you're using many different SSL option settings
654 * with a given context. (The options affecting buffer size are
655 * max_send_fragment, read buffer vs write buffer,
656 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
657 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
658 * possible size is not an option, since max_send_fragment can take on many
659 * different values.
661 * If you are on a platform with a slow malloc(), and you're using SSL
662 * connections with many different settings for these options, and you need to
663 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
664 * - Link against a faster malloc implementation.
665 * - Use a separate SSL_CTX for each option set.
666 * - Improve this code.
668 static void *freelist_extract(SSL_CTX *ctx, int for_read, int sz)
670 SSL3_BUF_FREELIST *list;
671 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
672 void *result = NULL;
674 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
675 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
676 if (list != NULL && sz == (int)list->chunklen)
677 ent = list->head;
678 if (ent != NULL) {
679 list->head = ent->next;
680 result = ent;
681 if (--list->len == 0)
682 list->chunklen = 0;
684 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
685 if (!result)
686 result = OPENSSL_malloc(sz);
687 return result;
690 static void freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
692 SSL3_BUF_FREELIST *list;
693 SSL3_BUF_FREELIST_ENTRY *ent;
695 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
696 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
697 if (list != NULL &&
698 (sz == list->chunklen || list->chunklen == 0) &&
699 list->len < ctx->freelist_max_len && sz >= sizeof(*ent)) {
700 list->chunklen = sz;
701 ent = mem;
702 ent->next = list->head;
703 list->head = ent;
704 ++list->len;
705 mem = NULL;
708 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
709 if (mem)
710 OPENSSL_free(mem);
712 #else
713 # define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
714 # define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
715 #endif
717 int ssl3_setup_read_buffer(SSL *s)
719 unsigned char *p;
720 size_t len, align = 0, headerlen;
722 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
723 headerlen = DTLS1_RT_HEADER_LENGTH;
724 else
725 headerlen = SSL3_RT_HEADER_LENGTH;
727 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
728 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
729 #endif
731 if (s->s3->rbuf.buf == NULL) {
732 len = SSL3_RT_MAX_PLAIN_LENGTH
733 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
734 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) {
735 s->s3->init_extra = 1;
736 len += SSL3_RT_MAX_EXTRA;
738 #ifndef OPENSSL_NO_COMP
739 if (!(s->options & SSL_OP_NO_COMPRESSION))
740 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
741 #endif
742 if ((p = freelist_extract(s->ctx, 1, len)) == NULL)
743 goto err;
744 s->s3->rbuf.buf = p;
745 s->s3->rbuf.len = len;
748 s->packet = &(s->s3->rbuf.buf[0]);
749 return 1;
751 err:
752 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE);
753 return 0;
756 int ssl3_setup_write_buffer(SSL *s)
758 unsigned char *p;
759 size_t len, align = 0, headerlen;
761 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
762 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
763 else
764 headerlen = SSL3_RT_HEADER_LENGTH;
766 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
767 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
768 #endif
770 if (s->s3->wbuf.buf == NULL) {
771 len = s->max_send_fragment
772 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
773 #ifndef OPENSSL_NO_COMP
774 if (!(s->options & SSL_OP_NO_COMPRESSION))
775 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
776 #endif
777 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
778 len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
780 if ((p = freelist_extract(s->ctx, 0, len)) == NULL)
781 goto err;
782 s->s3->wbuf.buf = p;
783 s->s3->wbuf.len = len;
786 return 1;
788 err:
789 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE);
790 return 0;
793 int ssl3_setup_buffers(SSL *s)
795 if (!ssl3_setup_read_buffer(s))
796 return 0;
797 if (!ssl3_setup_write_buffer(s))
798 return 0;
799 return 1;
802 int ssl3_release_write_buffer(SSL *s)
804 if (s->s3->wbuf.buf != NULL) {
805 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
806 s->s3->wbuf.buf = NULL;
808 return 1;
811 int ssl3_release_read_buffer(SSL *s)
813 if (s->s3->rbuf.buf != NULL) {
814 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
815 s->s3->rbuf.buf = NULL;
817 return 1;