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Adam Langley95c29f32014-06-20 12:00:00 -07001/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
56 */
57/* ====================================================================
58 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
59 *
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
62 * are met:
63 *
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
66 *
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
76 *
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
81 *
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
85 *
86 * 6. Redistributions of any form whatsoever must retain the following
87 * acknowledgment:
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
90 *
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
104 *
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com). */
108/* ====================================================================
109 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
110 * ECC cipher suite support in OpenSSL originally developed by
111 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */
112
113#include <assert.h>
114#include <limits.h>
115#include <stdio.h>
116#include <string.h>
117
118#include <openssl/buf.h>
119#include <openssl/evp.h>
120#include <openssl/mem.h>
121#include <openssl/obj.h>
122#include <openssl/rand.h>
123#include <openssl/x509.h>
124
125#include "ssl_locl.h"
126
127/* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
128int ssl3_do_write(SSL *s, int type)
129 {
130 int ret;
131
132 ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
133 s->init_num);
134 if (ret < 0) return(-1);
135 if (type == SSL3_RT_HANDSHAKE)
136 /* should not be done for 'Hello Request's, but in that case
137 * we'll ignore the result anyway */
138 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
139
140 if (ret == s->init_num)
141 {
142 if (s->msg_callback)
143 s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
144 return(1);
145 }
146 s->init_off+=ret;
147 s->init_num-=ret;
148 return(0);
149 }
150
151int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
152 {
153 unsigned char *p;
154 int i;
155 unsigned long l;
156
157 if (s->state == a)
158 {
159 p = ssl_handshake_start(s);
160
161 i=s->method->ssl3_enc->final_finish_mac(s,
162 sender,slen,s->s3->tmp.finish_md);
163 if (i == 0)
164 return 0;
165 s->s3->tmp.finish_md_len = i;
166 memcpy(p, s->s3->tmp.finish_md, i);
167 l=i;
168
169 /* Copy the finished so we can use it for
170 renegotiation checks */
171 if(s->type == SSL_ST_CONNECT)
172 {
173 assert(i <= EVP_MAX_MD_SIZE);
174 memcpy(s->s3->previous_client_finished,
175 s->s3->tmp.finish_md, i);
176 s->s3->previous_client_finished_len=i;
177 }
178 else
179 {
180 assert(i <= EVP_MAX_MD_SIZE);
181 memcpy(s->s3->previous_server_finished,
182 s->s3->tmp.finish_md, i);
183 s->s3->previous_server_finished_len=i;
184 }
185
186#ifdef OPENSSL_SYS_WIN16
187 /* MSVC 1.5 does not clear the top bytes of the word unless
188 * I do this.
189 */
190 l&=0xffff;
191#endif
192 ssl_set_handshake_header(s, SSL3_MT_FINISHED, l);
193 s->state=b;
194 }
195
196 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
197 return ssl_do_write(s);
198 }
199
200#ifndef OPENSSL_NO_NEXTPROTONEG
201/* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
202static void ssl3_take_mac(SSL *s)
203 {
204 const char *sender;
205 int slen;
206 /* If no new cipher setup return immediately: other functions will
207 * set the appropriate error.
208 */
209 if (s->s3->tmp.new_cipher == NULL)
210 return;
211 if (s->state & SSL_ST_CONNECT)
212 {
213 sender=s->method->ssl3_enc->server_finished_label;
214 slen=s->method->ssl3_enc->server_finished_label_len;
215 }
216 else
217 {
218 sender=s->method->ssl3_enc->client_finished_label;
219 slen=s->method->ssl3_enc->client_finished_label_len;
220 }
221
222 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
223 sender,slen,s->s3->tmp.peer_finish_md);
224 }
225#endif
226
227int ssl3_get_finished(SSL *s, int a, int b)
228 {
229 int al,i,ok;
230 long n;
231 unsigned char *p;
232
233#ifdef OPENSSL_NO_NEXTPROTONEG
234 /* the mac has already been generated when we received the
235 * change cipher spec message and is in s->s3->tmp.peer_finish_md
236 */
237#endif
238
239 n=s->method->ssl_get_message(s,
240 a,
241 b,
242 SSL3_MT_FINISHED,
243 64, /* should actually be 36+4 :-) */
244 &ok);
245
246 if (!ok) return((int)n);
247
David Benjamin86271ee2014-07-21 16:14:03 -0400248 /* If this occurs, we have missed a message.
249 * TODO(davidben): Is this check now redundant with
250 * SSL3_FLAGS_EXPECT_CCS? */
Adam Langley95c29f32014-06-20 12:00:00 -0700251 if (!s->s3->change_cipher_spec)
252 {
253 al=SSL_AD_UNEXPECTED_MESSAGE;
254 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
255 goto f_err;
256 }
257 s->s3->change_cipher_spec=0;
258
David Benjamin51b1f742014-07-12 16:31:12 -0400259 p = s->init_msg;
Adam Langley95c29f32014-06-20 12:00:00 -0700260 i = s->s3->tmp.peer_finish_md_len;
261
262 if (i != n)
263 {
264 al=SSL_AD_DECODE_ERROR;
265 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_BAD_DIGEST_LENGTH);
266 goto f_err;
267 }
268
269 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
270 {
271 al=SSL_AD_DECRYPT_ERROR;
272 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_DIGEST_CHECK_FAILED);
273 goto f_err;
274 }
275
276 /* Copy the finished so we can use it for
277 renegotiation checks */
278 if(s->type == SSL_ST_ACCEPT)
279 {
280 assert(i <= EVP_MAX_MD_SIZE);
281 memcpy(s->s3->previous_client_finished,
282 s->s3->tmp.peer_finish_md, i);
283 s->s3->previous_client_finished_len=i;
284 }
285 else
286 {
287 assert(i <= EVP_MAX_MD_SIZE);
288 memcpy(s->s3->previous_server_finished,
289 s->s3->tmp.peer_finish_md, i);
290 s->s3->previous_server_finished_len=i;
291 }
292
293 return(1);
294f_err:
295 ssl3_send_alert(s,SSL3_AL_FATAL,al);
296 return(0);
297 }
298
299/* for these 2 messages, we need to
300 * ssl->enc_read_ctx re-init
301 * ssl->s3->read_sequence zero
302 * ssl->s3->read_mac_secret re-init
303 * ssl->session->read_sym_enc assign
304 * ssl->session->read_compression assign
305 * ssl->session->read_hash assign
306 */
307int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
308 {
309 unsigned char *p;
310
311 if (s->state == a)
312 {
313 p=(unsigned char *)s->init_buf->data;
314 *p=SSL3_MT_CCS;
315 s->init_num=1;
316 s->init_off=0;
317
318 s->state=b;
319 }
320
321 /* SSL3_ST_CW_CHANGE_B */
322 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
323 }
324
325unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
326 {
327 unsigned char *p;
328 unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
329
330 if (!ssl_add_cert_chain(s, cpk, &l))
331 return 0;
332
333 l -= 3 + SSL_HM_HEADER_LENGTH(s);
334 p = ssl_handshake_start(s);
335 l2n3(l,p);
336 l += 3;
337 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l);
338 return l + SSL_HM_HEADER_LENGTH(s);
339 }
340
341/* Obtain handshake message of message type 'mt' (any if mt == -1),
342 * maximum acceptable body length 'max'.
343 * The first four bytes (msg_type and length) are read in state 'st1',
344 * the body is read in state 'stn'.
345 */
346long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
347 {
348 unsigned char *p;
349 unsigned long l;
350 long n;
351 int i,al;
352
353 if (s->s3->tmp.reuse_message)
354 {
355 s->s3->tmp.reuse_message=0;
356 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
357 {
358 al=SSL_AD_UNEXPECTED_MESSAGE;
359 OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_UNEXPECTED_MESSAGE);
360 goto f_err;
361 }
362 *ok=1;
David Benjamin51b1f742014-07-12 16:31:12 -0400363 s->init_msg = (uint8_t*)s->init_buf->data + 4;
Adam Langley95c29f32014-06-20 12:00:00 -0700364 s->init_num = (int)s->s3->tmp.message_size;
365 return s->init_num;
366 }
367
368 p=(unsigned char *)s->init_buf->data;
369
370 if (s->state == st1) /* s->init_num < 4 */
371 {
372 int skip_message;
373
374 do
375 {
376 while (s->init_num < 4)
377 {
378 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
379 &p[s->init_num],4 - s->init_num, 0);
380 if (i <= 0)
381 {
382 s->rwstate=SSL_READING;
383 *ok = 0;
384 return i;
385 }
386 s->init_num+=i;
387 }
388
389 skip_message = 0;
390 if (!s->server)
391 if (p[0] == SSL3_MT_HELLO_REQUEST)
392 /* The server may always send 'Hello Request' messages --
393 * we are doing a handshake anyway now, so ignore them
394 * if their format is correct. Does not count for
395 * 'Finished' MAC. */
396 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
397 {
398 s->init_num = 0;
399 skip_message = 1;
400
401 if (s->msg_callback)
402 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
403 }
404 }
405 while (skip_message);
406
407 /* s->init_num == 4 */
408
409 if ((mt >= 0) && (*p != mt))
410 {
411 al=SSL_AD_UNEXPECTED_MESSAGE;
412 OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_UNEXPECTED_MESSAGE);
413 goto f_err;
414 }
415 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
416 (st1 == SSL3_ST_SR_CERT_A) &&
417 (stn == SSL3_ST_SR_CERT_B))
418 {
419 /* At this point we have got an MS SGC second client
420 * hello (maybe we should always allow the client to
421 * start a new handshake?). We need to restart the mac.
422 * Don't increment {num,total}_renegotiations because
423 * we have not completed the handshake. */
424 ssl3_init_finished_mac(s);
425 }
426
427 s->s3->tmp.message_type= *(p++);
428
429 n2l3(p,l);
430 if (l > (unsigned long)max)
431 {
432 al=SSL_AD_ILLEGAL_PARAMETER;
433 OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_EXCESSIVE_MESSAGE_SIZE);
434 goto f_err;
435 }
436 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
437 {
438 al=SSL_AD_ILLEGAL_PARAMETER;
439 OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_EXCESSIVE_MESSAGE_SIZE);
440 goto f_err;
441 }
442 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
443 {
444 OPENSSL_PUT_ERROR(SSL, ssl3_get_message, ERR_R_BUF_LIB);
445 goto err;
446 }
447 s->s3->tmp.message_size=l;
448 s->state=stn;
449
David Benjamin51b1f742014-07-12 16:31:12 -0400450 s->init_msg = (uint8_t*)s->init_buf->data + 4;
Adam Langley95c29f32014-06-20 12:00:00 -0700451 s->init_num = 0;
452 }
453
454 /* next state (stn) */
455 p = s->init_msg;
456 n = s->s3->tmp.message_size - s->init_num;
457 while (n > 0)
458 {
459 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
460 if (i <= 0)
461 {
462 s->rwstate=SSL_READING;
463 *ok = 0;
464 return i;
465 }
466 s->init_num += i;
467 n -= i;
468 }
469
470#ifndef OPENSSL_NO_NEXTPROTONEG
471 /* If receiving Finished, record MAC of prior handshake messages for
472 * Finished verification. */
473 if (*s->init_buf->data == SSL3_MT_FINISHED)
474 ssl3_take_mac(s);
475#endif
476
477 /* Feed this message into MAC computation. */
Adam Langley1258b6a2014-06-20 12:00:00 -0700478 if (*((unsigned char*) s->init_buf->data) != SSL3_MT_ENCRYPTED_EXTENSIONS)
479 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
Adam Langley95c29f32014-06-20 12:00:00 -0700480 if (s->msg_callback)
481 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
482 *ok=1;
483 return s->init_num;
484f_err:
485 ssl3_send_alert(s,SSL3_AL_FATAL,al);
486err:
487 *ok=0;
488 return(-1);
489 }
490
491int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
492 {
493 EVP_PKEY *pk;
494 int ret= -1,i;
495
496 if (pkey == NULL)
497 pk=X509_get_pubkey(x);
498 else
499 pk=pkey;
500 if (pk == NULL) goto err;
501
502 i=pk->type;
503 if (i == EVP_PKEY_RSA)
504 {
505 ret=SSL_PKEY_RSA_ENC;
506 }
507 else if (i == EVP_PKEY_DSA)
508 {
509 ret=SSL_PKEY_DSA_SIGN;
510 }
511#ifndef OPENSSL_NO_EC
512 else if (i == EVP_PKEY_EC)
513 {
514 ret = SSL_PKEY_ECC;
515 }
516#endif
Adam Langley95c29f32014-06-20 12:00:00 -0700517 else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX))
518 {
519 /* For DH two cases: DH certificate signed with RSA and
520 * DH certificate signed with DSA.
521 */
522 i = X509_certificate_type(x, pk);
523 if (i & EVP_PKS_RSA)
524 ret = SSL_PKEY_DH_RSA;
525 else if (i & EVP_PKS_DSA)
526 ret = SSL_PKEY_DH_DSA;
527 }
528
529err:
530 if(!pkey) EVP_PKEY_free(pk);
531 return(ret);
532 }
533
534int ssl_verify_alarm_type(long type)
535 {
536 int al;
537
538 switch(type)
539 {
540 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
541 case X509_V_ERR_UNABLE_TO_GET_CRL:
542 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
543 al=SSL_AD_UNKNOWN_CA;
544 break;
545 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
546 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
547 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
548 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
549 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
550 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
551 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
552 case X509_V_ERR_CERT_NOT_YET_VALID:
553 case X509_V_ERR_CRL_NOT_YET_VALID:
554 case X509_V_ERR_CERT_UNTRUSTED:
555 case X509_V_ERR_CERT_REJECTED:
556 al=SSL_AD_BAD_CERTIFICATE;
557 break;
558 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
559 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
560 al=SSL_AD_DECRYPT_ERROR;
561 break;
562 case X509_V_ERR_CERT_HAS_EXPIRED:
563 case X509_V_ERR_CRL_HAS_EXPIRED:
564 al=SSL_AD_CERTIFICATE_EXPIRED;
565 break;
566 case X509_V_ERR_CERT_REVOKED:
567 al=SSL_AD_CERTIFICATE_REVOKED;
568 break;
569 case X509_V_ERR_OUT_OF_MEM:
570 al=SSL_AD_INTERNAL_ERROR;
571 break;
572 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
573 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
574 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
575 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
576 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
577 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
578 case X509_V_ERR_INVALID_CA:
579 al=SSL_AD_UNKNOWN_CA;
580 break;
581 case X509_V_ERR_APPLICATION_VERIFICATION:
582 al=SSL_AD_HANDSHAKE_FAILURE;
583 break;
584 case X509_V_ERR_INVALID_PURPOSE:
585 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
586 break;
587 default:
588 al=SSL_AD_CERTIFICATE_UNKNOWN;
589 break;
590 }
591 return(al);
592 }
593
594#ifndef OPENSSL_NO_BUF_FREELISTS
595/* On some platforms, malloc() performance is bad enough that you can't just
596 * free() and malloc() buffers all the time, so we need to use freelists from
597 * unused buffers. Currently, each freelist holds memory chunks of only a
598 * given size (list->chunklen); other sized chunks are freed and malloced.
599 * This doesn't help much if you're using many different SSL option settings
600 * with a given context. (The options affecting buffer size are
601 * max_send_fragment, read buffer vs write buffer,
602 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
603 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
604 * possible size is not an option, since max_send_fragment can take on many
605 * different values.
606 *
607 * If you are on a platform with a slow malloc(), and you're using SSL
608 * connections with many different settings for these options, and you need to
609 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
610 * - Link against a faster malloc implementation.
611 * - Use a separate SSL_CTX for each option set.
612 * - Improve this code.
613 */
614static void *
615freelist_extract(SSL_CTX *ctx, int for_read, int sz)
616 {
617 SSL3_BUF_FREELIST *list;
618 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
619 void *result = NULL;
620
621 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
622 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
623 if (list != NULL && sz == (int)list->chunklen)
624 ent = list->head;
625 if (ent != NULL)
626 {
627 list->head = ent->next;
628 result = ent;
629 if (--list->len == 0)
630 list->chunklen = 0;
631 }
632 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
633 if (!result)
634 result = OPENSSL_malloc(sz);
635 return result;
636}
637
638static void
639freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
640 {
641 SSL3_BUF_FREELIST *list;
642 SSL3_BUF_FREELIST_ENTRY *ent;
643
644 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
645 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
646 if (list != NULL &&
647 (sz == list->chunklen || list->chunklen == 0) &&
648 list->len < ctx->freelist_max_len &&
649 sz >= sizeof(*ent))
650 {
651 list->chunklen = sz;
652 ent = mem;
653 ent->next = list->head;
654 list->head = ent;
655 ++list->len;
656 mem = NULL;
657 }
658
659 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
660 if (mem)
661 OPENSSL_free(mem);
662 }
663#else
664#define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
665#define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
666#endif
667
668int ssl3_setup_read_buffer(SSL *s)
669 {
670 unsigned char *p;
671 size_t len,align=0,headerlen;
672
673 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
674 headerlen = DTLS1_RT_HEADER_LENGTH;
675 else
676 headerlen = SSL3_RT_HEADER_LENGTH;
677
678#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
679 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
680#endif
681
682 if (s->s3->rbuf.buf == NULL)
683 {
684 len = SSL3_RT_MAX_PLAIN_LENGTH
685 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
686 + headerlen + align;
687 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
688 {
689 s->s3->init_extra = 1;
690 len += SSL3_RT_MAX_EXTRA;
691 }
692 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
693 goto err;
694 s->s3->rbuf.buf = p;
695 s->s3->rbuf.len = len;
696 }
697
698 s->packet= &(s->s3->rbuf.buf[0]);
699 return 1;
700
701err:
702 OPENSSL_PUT_ERROR(SSL, ssl3_setup_read_buffer, ERR_R_MALLOC_FAILURE);
703 return 0;
704 }
705
706int ssl3_setup_write_buffer(SSL *s)
707 {
708 unsigned char *p;
709 size_t len,align=0,headerlen;
710
711 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
712 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
713 else
714 headerlen = SSL3_RT_HEADER_LENGTH;
715
716#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
717 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
718#endif
719
720 if (s->s3->wbuf.buf == NULL)
721 {
722 len = s->max_send_fragment
723 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
724 + headerlen + align;
725 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
726 len += headerlen + align
727 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
728
729 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
730 goto err;
731 s->s3->wbuf.buf = p;
732 s->s3->wbuf.len = len;
733 }
734
735 return 1;
736
737err:
738 OPENSSL_PUT_ERROR(SSL, ssl3_setup_write_buffer, ERR_R_MALLOC_FAILURE);
739 return 0;
740 }
741
742
743int ssl3_setup_buffers(SSL *s)
744 {
745 if (!ssl3_setup_read_buffer(s))
746 return 0;
747 if (!ssl3_setup_write_buffer(s))
748 return 0;
749 return 1;
750 }
751
752int ssl3_release_write_buffer(SSL *s)
753 {
754 if (s->s3->wbuf.buf != NULL)
755 {
756 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
757 s->s3->wbuf.buf = NULL;
758 }
759 return 1;
760 }
761
762int ssl3_release_read_buffer(SSL *s)
763 {
764 if (s->s3->rbuf.buf != NULL)
765 {
766 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
767 s->s3->rbuf.buf = NULL;
768 }
769 return 1;
770 }
771