1 /* ssl/s3_both.c */
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 <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>
126
127 /*
128 * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
129 * SSL3_RT_CHANGE_CIPHER_SPEC)
130 */
ssl3_do_write(SSL * s,int type)131 int ssl3_do_write(SSL *s, int type)
132 {
133 int ret;
134
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)
140 /*
141 * should not be done for 'Hello Request's, but in that case we'll
142 * ignore the result anyway
143 */
144 ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off],
145 ret);
146
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);
153 }
154 s->init_off += ret;
155 s->init_num -= ret;
156 return (0);
157 }
158
ssl3_send_finished(SSL * s,int a,int b,const char * sender,int slen)159 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
160 {
161 unsigned char *p;
162 int i;
163 unsigned long l;
164
165 if (s->state == a) {
166 p = ssl_handshake_start(s);
167
168 i = s->method->ssl3_enc->final_finish_mac(s,
169 sender, slen,
170 s->s3->tmp.finish_md);
171 if (i <= 0)
172 return 0;
173 s->s3->tmp.finish_md_len = i;
174 memcpy(p, s->s3->tmp.finish_md, i);
175 l = i;
176
177 /*
178 * Copy the finished so we can use it for renegotiation checks
179 */
180 if (s->type == SSL_ST_CONNECT) {
181 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
182 memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i);
183 s->s3->previous_client_finished_len = i;
184 } else {
185 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
186 memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i);
187 s->s3->previous_server_finished_len = i;
188 }
189
190 #ifdef OPENSSL_SYS_WIN16
191 /*
192 * MSVC 1.5 does not clear the top bytes of the word unless I do
193 * this.
194 */
195 l &= 0xffff;
196 #endif
197 ssl_set_handshake_header(s, SSL3_MT_FINISHED, l);
198 s->state = b;
199 }
200
201 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
202 return ssl_do_write(s);
203 }
204
205 #ifndef OPENSSL_NO_NEXTPROTONEG
206 /*
207 * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
208 * to far.
209 */
ssl3_take_mac(SSL * s)210 static void ssl3_take_mac(SSL *s)
211 {
212 const char *sender;
213 int slen;
214 /*
215 * If no new cipher setup return immediately: other functions will set
216 * the appropriate error.
217 */
218 if (s->s3->tmp.new_cipher == NULL)
219 return;
220 if (s->state & SSL_ST_CONNECT) {
221 sender = s->method->ssl3_enc->server_finished_label;
222 slen = s->method->ssl3_enc->server_finished_label_len;
223 } else {
224 sender = s->method->ssl3_enc->client_finished_label;
225 slen = s->method->ssl3_enc->client_finished_label_len;
226 }
227
228 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
229 sender,
230 slen,
231 s->s3->tmp.peer_finish_md);
232 }
233 #endif
234
ssl3_get_finished(SSL * s,int a,int b)235 int ssl3_get_finished(SSL *s, int a, int b)
236 {
237 int al, i, ok;
238 long n;
239 unsigned char *p;
240
241 #ifdef OPENSSL_NO_NEXTPROTONEG
242 /*
243 * the mac has already been generated when we received the change cipher
244 * spec message and is in s->s3->tmp.peer_finish_md
245 */
246 #endif
247
248 /* 64 argument should actually be 36+4 :-) */
249 n = s->method->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok);
250
251 if (!ok)
252 return ((int)n);
253
254 /* If this occurs, we have missed a message */
255 if (!s->s3->change_cipher_spec) {
256 al = SSL_AD_UNEXPECTED_MESSAGE;
257 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
258 goto f_err;
259 }
260 s->s3->change_cipher_spec = 0;
261
262 p = (unsigned char *)s->init_msg;
263 i = s->s3->tmp.peer_finish_md_len;
264
265 if (i != n) {
266 al = SSL_AD_DECODE_ERROR;
267 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH);
268 goto f_err;
269 }
270
271 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) {
272 al = SSL_AD_DECRYPT_ERROR;
273 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_DIGEST_CHECK_FAILED);
274 goto f_err;
275 }
276
277 /*
278 * Copy the finished so we can use it for renegotiation checks
279 */
280 if (s->type == SSL_ST_ACCEPT) {
281 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
282 memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i);
283 s->s3->previous_client_finished_len = i;
284 } else {
285 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
286 memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i);
287 s->s3->previous_server_finished_len = i;
288 }
289
290 return (1);
291 f_err:
292 ssl3_send_alert(s, SSL3_AL_FATAL, al);
293 return (0);
294 }
295
296 /*-
297 * for these 2 messages, we need to
298 * ssl->enc_read_ctx re-init
299 * ssl->s3->read_sequence zero
300 * ssl->s3->read_mac_secret re-init
301 * ssl->session->read_sym_enc assign
302 * ssl->session->read_compression assign
303 * ssl->session->read_hash assign
304 */
ssl3_send_change_cipher_spec(SSL * s,int a,int b)305 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
306 {
307 unsigned char *p;
308
309 if (s->state == a) {
310 p = (unsigned char *)s->init_buf->data;
311 *p = SSL3_MT_CCS;
312 s->init_num = 1;
313 s->init_off = 0;
314
315 s->state = b;
316 }
317
318 /* SSL3_ST_CW_CHANGE_B */
319 return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC));
320 }
321
ssl3_output_cert_chain(SSL * s,CERT_PKEY * cpk)322 unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
323 {
324 unsigned char *p;
325 unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
326
327 if (!ssl_add_cert_chain(s, cpk, &l))
328 return 0;
329
330 l -= 3 + SSL_HM_HEADER_LENGTH(s);
331 p = ssl_handshake_start(s);
332 l2n3(l, p);
333 l += 3;
334 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l);
335 return l + SSL_HM_HEADER_LENGTH(s);
336 }
337
338 /*
339 * Obtain handshake message of message type 'mt' (any if mt == -1), maximum
340 * acceptable body length 'max'. The first four bytes (msg_type and length)
341 * are read in state 'st1', the body is read in state 'stn'.
342 */
ssl3_get_message(SSL * s,int st1,int stn,int mt,long max,int * ok)343 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
344 {
345 unsigned char *p;
346 unsigned long l;
347 long n;
348 int i, al;
349
350 if (s->s3->tmp.reuse_message) {
351 s->s3->tmp.reuse_message = 0;
352 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) {
353 al = SSL_AD_UNEXPECTED_MESSAGE;
354 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
355 goto f_err;
356 }
357 *ok = 1;
358 s->state = stn;
359 s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
360 s->init_num = (int)s->s3->tmp.message_size;
361 return s->init_num;
362 }
363
364 p = (unsigned char *)s->init_buf->data;
365
366 if (s->state == st1) { /* s->init_num < SSL3_HM_HEADER_LENGTH */
367 int skip_message;
368
369 do {
370 while (s->init_num < SSL3_HM_HEADER_LENGTH) {
371 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
372 &p[s->init_num],
373 SSL3_HM_HEADER_LENGTH -
374 s->init_num, 0);
375 if (i <= 0) {
376 s->rwstate = SSL_READING;
377 *ok = 0;
378 return i;
379 }
380 s->init_num += i;
381 }
382
383 skip_message = 0;
384 if (!s->server)
385 if (p[0] == SSL3_MT_HELLO_REQUEST)
386 /*
387 * The server may always send 'Hello Request' messages --
388 * we are doing a handshake anyway now, so ignore them if
389 * their format is correct. Does not count for 'Finished'
390 * MAC.
391 */
392 if (p[1] == 0 && p[2] == 0 && p[3] == 0) {
393 s->init_num = 0;
394 skip_message = 1;
395
396 if (s->msg_callback)
397 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
398 p, SSL3_HM_HEADER_LENGTH, s,
399 s->msg_callback_arg);
400 }
401 }
402 while (skip_message);
403
404 /* s->init_num == SSL3_HM_HEADER_LENGTH */
405
406 if ((mt >= 0) && (*p != mt)) {
407 al = SSL_AD_UNEXPECTED_MESSAGE;
408 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
409 goto f_err;
410 }
411
412 s->s3->tmp.message_type = *(p++);
413
414 n2l3(p, l);
415 if (l > (unsigned long)max) {
416 al = SSL_AD_ILLEGAL_PARAMETER;
417 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE);
418 goto f_err;
419 }
420 /*
421 * Make buffer slightly larger than message length as a precaution
422 * against small OOB reads e.g. CVE-2016-6306
423 */
424 if (l
425 && !BUF_MEM_grow_clean(s->init_buf,
426 (int)l + SSL3_HM_HEADER_LENGTH + 16)) {
427 SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB);
428 goto err;
429 }
430 s->s3->tmp.message_size = l;
431 s->state = stn;
432
433 s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
434 s->init_num = 0;
435 }
436
437 /* next state (stn) */
438 p = s->init_msg;
439 n = s->s3->tmp.message_size - s->init_num;
440 while (n > 0) {
441 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->init_num],
442 n, 0);
443 if (i <= 0) {
444 s->rwstate = SSL_READING;
445 *ok = 0;
446 return i;
447 }
448 s->init_num += i;
449 n -= i;
450 }
451
452 #ifndef OPENSSL_NO_NEXTPROTONEG
453 /*
454 * If receiving Finished, record MAC of prior handshake messages for
455 * Finished verification.
456 */
457 if (*s->init_buf->data == SSL3_MT_FINISHED)
458 ssl3_take_mac(s);
459 #endif
460
461 /* Feed this message into MAC computation. */
462 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
463 s->init_num + SSL3_HM_HEADER_LENGTH);
464 if (s->msg_callback)
465 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
466 (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s,
467 s->msg_callback_arg);
468 *ok = 1;
469 return s->init_num;
470 f_err:
471 ssl3_send_alert(s, SSL3_AL_FATAL, al);
472 err:
473 *ok = 0;
474 return (-1);
475 }
476
ssl_cert_type(X509 * x,EVP_PKEY * pkey)477 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
478 {
479 EVP_PKEY *pk;
480 int ret = -1, i;
481
482 if (pkey == NULL)
483 pk = X509_get_pubkey(x);
484 else
485 pk = pkey;
486 if (pk == NULL)
487 goto err;
488
489 i = pk->type;
490 if (i == EVP_PKEY_RSA) {
491 ret = SSL_PKEY_RSA_ENC;
492 } else if (i == EVP_PKEY_DSA) {
493 ret = SSL_PKEY_DSA_SIGN;
494 }
495 #ifndef OPENSSL_NO_EC
496 else if (i == EVP_PKEY_EC) {
497 ret = SSL_PKEY_ECC;
498 }
499 #endif
500 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) {
501 ret = SSL_PKEY_GOST94;
502 } else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) {
503 ret = SSL_PKEY_GOST01;
504 } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) {
505 /*
506 * For DH two cases: DH certificate signed with RSA and DH
507 * certificate signed with DSA.
508 */
509 i = X509_certificate_type(x, pk);
510 if (i & EVP_PKS_RSA)
511 ret = SSL_PKEY_DH_RSA;
512 else if (i & EVP_PKS_DSA)
513 ret = SSL_PKEY_DH_DSA;
514 }
515
516 err:
517 if (!pkey)
518 EVP_PKEY_free(pk);
519 return (ret);
520 }
521
ssl_verify_alarm_type(long type)522 int ssl_verify_alarm_type(long type)
523 {
524 int al;
525
526 switch (type) {
527 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
528 case X509_V_ERR_UNABLE_TO_GET_CRL:
529 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
530 al = SSL_AD_UNKNOWN_CA;
531 break;
532 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
533 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
534 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
535 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
536 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
537 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
538 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
539 case X509_V_ERR_CERT_NOT_YET_VALID:
540 case X509_V_ERR_CRL_NOT_YET_VALID:
541 case X509_V_ERR_CERT_UNTRUSTED:
542 case X509_V_ERR_CERT_REJECTED:
543 case X509_V_ERR_HOSTNAME_MISMATCH:
544 case X509_V_ERR_EMAIL_MISMATCH:
545 case X509_V_ERR_IP_ADDRESS_MISMATCH:
546 al = SSL_AD_BAD_CERTIFICATE;
547 break;
548 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
549 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
550 al = SSL_AD_DECRYPT_ERROR;
551 break;
552 case X509_V_ERR_CERT_HAS_EXPIRED:
553 case X509_V_ERR_CRL_HAS_EXPIRED:
554 al = SSL_AD_CERTIFICATE_EXPIRED;
555 break;
556 case X509_V_ERR_CERT_REVOKED:
557 al = SSL_AD_CERTIFICATE_REVOKED;
558 break;
559 case X509_V_ERR_UNSPECIFIED:
560 case X509_V_ERR_OUT_OF_MEM:
561 case X509_V_ERR_INVALID_CALL:
562 case X509_V_ERR_STORE_LOOKUP:
563 al = SSL_AD_INTERNAL_ERROR;
564 break;
565 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
566 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
567 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
568 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
569 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
570 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
571 case X509_V_ERR_INVALID_CA:
572 al = SSL_AD_UNKNOWN_CA;
573 break;
574 case X509_V_ERR_APPLICATION_VERIFICATION:
575 al = SSL_AD_HANDSHAKE_FAILURE;
576 break;
577 case X509_V_ERR_INVALID_PURPOSE:
578 al = SSL_AD_UNSUPPORTED_CERTIFICATE;
579 break;
580 default:
581 al = SSL_AD_CERTIFICATE_UNKNOWN;
582 break;
583 }
584 return (al);
585 }
586
587 #ifndef OPENSSL_NO_BUF_FREELISTS
588 /*-
589 * On some platforms, malloc() performance is bad enough that you can't just
590 * free() and malloc() buffers all the time, so we need to use freelists from
591 * unused buffers. Currently, each freelist holds memory chunks of only a
592 * given size (list->chunklen); other sized chunks are freed and malloced.
593 * This doesn't help much if you're using many different SSL option settings
594 * with a given context. (The options affecting buffer size are
595 * max_send_fragment, read buffer vs write buffer,
596 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
597 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
598 * possible size is not an option, since max_send_fragment can take on many
599 * different values.
600 *
601 * If you are on a platform with a slow malloc(), and you're using SSL
602 * connections with many different settings for these options, and you need to
603 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
604 * - Link against a faster malloc implementation.
605 * - Use a separate SSL_CTX for each option set.
606 * - Improve this code.
607 */
freelist_extract(SSL_CTX * ctx,int for_read,int sz)608 static void *freelist_extract(SSL_CTX *ctx, int for_read, int sz)
609 {
610 SSL3_BUF_FREELIST *list;
611 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
612 void *result = NULL;
613
614 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
615 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
616 if (list != NULL && sz == (int)list->chunklen)
617 ent = list->head;
618 if (ent != NULL) {
619 list->head = ent->next;
620 result = ent;
621 if (--list->len == 0)
622 list->chunklen = 0;
623 }
624 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
625 if (!result)
626 result = OPENSSL_malloc(sz);
627 return result;
628 }
629
freelist_insert(SSL_CTX * ctx,int for_read,size_t sz,void * mem)630 static void freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
631 {
632 SSL3_BUF_FREELIST *list;
633 SSL3_BUF_FREELIST_ENTRY *ent;
634
635 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
636 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
637 if (list != NULL &&
638 (sz == list->chunklen || list->chunklen == 0) &&
639 list->len < ctx->freelist_max_len && sz >= sizeof(*ent)) {
640 list->chunklen = sz;
641 ent = mem;
642 ent->next = list->head;
643 list->head = ent;
644 ++list->len;
645 mem = NULL;
646 }
647
648 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
649 if (mem)
650 OPENSSL_free(mem);
651 }
652 #else
653 # define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
654 # define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
655 #endif
656
ssl3_setup_read_buffer(SSL * s)657 int ssl3_setup_read_buffer(SSL *s)
658 {
659 unsigned char *p;
660 size_t len, align = 0, headerlen;
661
662 if (SSL_IS_DTLS(s))
663 headerlen = DTLS1_RT_HEADER_LENGTH;
664 else
665 headerlen = SSL3_RT_HEADER_LENGTH;
666
667 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
668 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
669 #endif
670
671 if (s->s3->rbuf.buf == NULL) {
672 len = SSL3_RT_MAX_PLAIN_LENGTH
673 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
674 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) {
675 s->s3->init_extra = 1;
676 len += SSL3_RT_MAX_EXTRA;
677 }
678 #ifndef OPENSSL_NO_COMP
679 if (!(s->options & SSL_OP_NO_COMPRESSION))
680 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
681 #endif
682 if ((p = freelist_extract(s->ctx, 1, len)) == NULL)
683 goto err;
684 s->s3->rbuf.buf = p;
685 s->s3->rbuf.len = len;
686 }
687
688 s->packet = &(s->s3->rbuf.buf[0]);
689 return 1;
690
691 err:
692 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE);
693 return 0;
694 }
695
ssl3_setup_write_buffer(SSL * s)696 int ssl3_setup_write_buffer(SSL *s)
697 {
698 unsigned char *p;
699 size_t len, align = 0, headerlen;
700
701 if (SSL_IS_DTLS(s))
702 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
703 else
704 headerlen = SSL3_RT_HEADER_LENGTH;
705
706 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
707 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
708 #endif
709
710 if (s->s3->wbuf.buf == NULL) {
711 len = s->max_send_fragment
712 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
713 #ifndef OPENSSL_NO_COMP
714 if (!(s->options & SSL_OP_NO_COMPRESSION))
715 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
716 #endif
717 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
718 len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
719
720 if ((p = freelist_extract(s->ctx, 0, len)) == NULL)
721 goto err;
722 s->s3->wbuf.buf = p;
723 s->s3->wbuf.len = len;
724 }
725
726 return 1;
727
728 err:
729 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE);
730 return 0;
731 }
732
ssl3_setup_buffers(SSL * s)733 int ssl3_setup_buffers(SSL *s)
734 {
735 if (!ssl3_setup_read_buffer(s))
736 return 0;
737 if (!ssl3_setup_write_buffer(s))
738 return 0;
739 return 1;
740 }
741
ssl3_release_write_buffer(SSL * s)742 int ssl3_release_write_buffer(SSL *s)
743 {
744 if (s->s3->wbuf.buf != NULL) {
745 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
746 s->s3->wbuf.buf = NULL;
747 }
748 return 1;
749 }
750
ssl3_release_read_buffer(SSL * s)751 int ssl3_release_read_buffer(SSL *s)
752 {
753 if (s->s3->rbuf.buf != NULL) {
754 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
755 s->s3->rbuf.buf = NULL;
756 }
757 return 1;
758 }
759