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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/* 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,*d;
154 int i;
155 unsigned long l;
156
157 if (s->state == a)
158 {
159 d=(unsigned char *)s->init_buf->data;
160 p= &(d[4]);
161
162 i=s->method->ssl3_enc->final_finish_mac(s,
163 sender,slen,s->s3->tmp.finish_md);
164 s->s3->tmp.finish_md_len = i;
165 memcpy(p, s->s3->tmp.finish_md, i);
166 p+=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 OPENSSL_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 OPENSSL_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
193 *(d++)=SSL3_MT_FINISHED;
194 l2n3(l,d);
195 s->init_num=(int)l+4;
196 s->init_off=0;
197
198 s->state=b;
199 }
200
201 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
202 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
203 }
204
205int ssl3_get_finished(SSL *s, int a, int b)
206 {
207 int al,i,ok;
208 long n;
209 unsigned char *p;
210
211 /* the mac has already been generated when we received the
212 * change cipher spec message and is in s->s3->tmp.peer_finish_md
213 */
214
215 n=s->method->ssl_get_message(s,
216 a,
217 b,
218 SSL3_MT_FINISHED,
219 64, /* should actually be 36+4 :-) */
220 &ok);
221
222 if (!ok) return((int)n);
223
224 /* If this occurs, we have missed a message */
225 if (!s->s3->change_cipher_spec)
226 {
227 al=SSL_AD_UNEXPECTED_MESSAGE;
228 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
229 goto f_err;
230 }
231 s->s3->change_cipher_spec=0;
232
233 p = (unsigned char *)s->init_msg;
234 i = s->s3->tmp.peer_finish_md_len;
235
236 if (i != n)
237 {
238 al=SSL_AD_DECODE_ERROR;
239 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
240 goto f_err;
241 }
242
243 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
244 {
245 al=SSL_AD_DECRYPT_ERROR;
246 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
247 goto f_err;
248 }
249
250 /* Copy the finished so we can use it for
251 renegotiation checks */
252 if(s->type == SSL_ST_ACCEPT)
253 {
254 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
255 memcpy(s->s3->previous_client_finished,
256 s->s3->tmp.peer_finish_md, i);
257 s->s3->previous_client_finished_len=i;
258 }
259 else
260 {
261 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
262 memcpy(s->s3->previous_server_finished,
263 s->s3->tmp.peer_finish_md, i);
264 s->s3->previous_server_finished_len=i;
265 }
266
267 return(1);
268f_err:
269 ssl3_send_alert(s,SSL3_AL_FATAL,al);
270 return(0);
271 }
272
273/* for these 2 messages, we need to
274 * ssl->enc_read_ctx re-init
275 * ssl->s3->read_sequence zero
276 * ssl->s3->read_mac_secret re-init
277 * ssl->session->read_sym_enc assign
278 * ssl->session->read_compression assign
279 * ssl->session->read_hash assign
280 */
281int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
282 {
283 unsigned char *p;
284
285 if (s->state == a)
286 {
287 p=(unsigned char *)s->init_buf->data;
288 *p=SSL3_MT_CCS;
289 s->init_num=1;
290 s->init_off=0;
291
292 s->state=b;
293 }
294
295 /* SSL3_ST_CW_CHANGE_B */
296 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
297 }
298
299static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
300 {
301 int n;
302 unsigned char *p;
303
304 n=i2d_X509(x,NULL);
305 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
306 {
307 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
308 return(-1);
309 }
310 p=(unsigned char *)&(buf->data[*l]);
311 l2n3(n,p);
312 i2d_X509(x,&p);
313 *l+=n+3;
314
315 return(0);
316 }
317
318unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
319 {
320 unsigned char *p;
321 int i;
322 unsigned long l=7;
323 BUF_MEM *buf;
324 int no_chain;
325
326 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
327 no_chain = 1;
328 else
329 no_chain = 0;
330
331 /* TLSv1 sends a chain with nothing in it, instead of an alert */
332 buf=s->init_buf;
333 if (!BUF_MEM_grow_clean(buf,10))
334 {
335 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
336 return(0);
337 }
338 if (x != NULL)
339 {
340 if (no_chain)
341 {
342 if (ssl3_add_cert_to_buf(buf, &l, x))
343 return(0);
344 }
345 else
346 {
347 X509_STORE_CTX xs_ctx;
348
349 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
350 {
351 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
352 return(0);
353 }
354 X509_verify_cert(&xs_ctx);
355 /* Don't leave errors in the queue */
356 ERR_clear_error();
357 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
358 {
359 x = sk_X509_value(xs_ctx.chain, i);
360
361 if (ssl3_add_cert_to_buf(buf, &l, x))
362 {
363 X509_STORE_CTX_cleanup(&xs_ctx);
364 return 0;
365 }
366 }
367 X509_STORE_CTX_cleanup(&xs_ctx);
368 }
369 }
370 /* Thawte special :-) */
371 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
372 {
373 x=sk_X509_value(s->ctx->extra_certs,i);
374 if (ssl3_add_cert_to_buf(buf, &l, x))
375 return(0);
376 }
377
378 l-=7;
379 p=(unsigned char *)&(buf->data[4]);
380 l2n3(l,p);
381 l+=3;
382 p=(unsigned char *)&(buf->data[0]);
383 *(p++)=SSL3_MT_CERTIFICATE;
384 l2n3(l,p);
385 l+=4;
386 return(l);
387 }
388
389/* Obtain handshake message of message type 'mt' (any if mt == -1),
390 * maximum acceptable body length 'max'.
391 * The first four bytes (msg_type and length) are read in state 'st1',
392 * the body is read in state 'stn'.
393 */
394long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
395 {
396 unsigned char *p;
397 unsigned long l;
398 long n;
399 int i,al;
400
401 if (s->s3->tmp.reuse_message)
402 {
403 s->s3->tmp.reuse_message=0;
404 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
405 {
406 al=SSL_AD_UNEXPECTED_MESSAGE;
407 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
408 goto f_err;
409 }
410 *ok=1;
411 s->init_msg = s->init_buf->data + 4;
412 s->init_num = (int)s->s3->tmp.message_size;
413 return s->init_num;
414 }
415
416 p=(unsigned char *)s->init_buf->data;
417
418 if (s->state == st1) /* s->init_num < 4 */
419 {
420 int skip_message;
421
422 do
423 {
424 while (s->init_num < 4)
425 {
426 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
427 &p[s->init_num],4 - s->init_num, 0);
428 if (i <= 0)
429 {
430 s->rwstate=SSL_READING;
431 *ok = 0;
432 return i;
433 }
434 s->init_num+=i;
435 }
436
437 skip_message = 0;
438 if (!s->server)
439 if (p[0] == SSL3_MT_HELLO_REQUEST)
440 /* The server may always send 'Hello Request' messages --
441 * we are doing a handshake anyway now, so ignore them
442 * if their format is correct. Does not count for
443 * 'Finished' MAC. */
444 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
445 {
446 s->init_num = 0;
447 skip_message = 1;
448
449 if (s->msg_callback)
450 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
451 }
452 }
453 while (skip_message);
454
455 /* s->init_num == 4 */
456
457 if ((mt >= 0) && (*p != mt))
458 {
459 al=SSL_AD_UNEXPECTED_MESSAGE;
460 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
461 goto f_err;
462 }
463 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
464 (st1 == SSL3_ST_SR_CERT_A) &&
465 (stn == SSL3_ST_SR_CERT_B))
466 {
467 /* At this point we have got an MS SGC second client
468 * hello (maybe we should always allow the client to
469 * start a new handshake?). We need to restart the mac.
470 * Don't increment {num,total}_renegotiations because
471 * we have not completed the handshake. */
472 ssl3_init_finished_mac(s);
473 }
474
475 s->s3->tmp.message_type= *(p++);
476
477 n2l3(p,l);
478 if (l > (unsigned long)max)
479 {
480 al=SSL_AD_ILLEGAL_PARAMETER;
481 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
482 goto f_err;
483 }
484 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
485 {
486 al=SSL_AD_ILLEGAL_PARAMETER;
487 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
488 goto f_err;
489 }
490 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
491 {
492 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
493 goto err;
494 }
495 s->s3->tmp.message_size=l;
496 s->state=stn;
497
498 s->init_msg = s->init_buf->data + 4;
499 s->init_num = 0;
500 }
501
502 /* next state (stn) */
503 p = s->init_msg;
504 n = s->s3->tmp.message_size - s->init_num;
505 while (n > 0)
506 {
507 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
508 if (i <= 0)
509 {
510 s->rwstate=SSL_READING;
511 *ok = 0;
512 return i;
513 }
514 s->init_num += i;
515 n -= i;
516 }
517 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
518 if (s->msg_callback)
519 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
520 *ok=1;
521 return s->init_num;
522f_err:
523 ssl3_send_alert(s,SSL3_AL_FATAL,al);
524err:
525 *ok=0;
526 return(-1);
527 }
528
529int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
530 {
531 EVP_PKEY *pk;
532 int ret= -1,i;
533
534 if (pkey == NULL)
535 pk=X509_get_pubkey(x);
536 else
537 pk=pkey;
538 if (pk == NULL) goto err;
539
540 i=pk->type;
541 if (i == EVP_PKEY_RSA)
542 {
543 ret=SSL_PKEY_RSA_ENC;
544 }
545 else if (i == EVP_PKEY_DSA)
546 {
547 ret=SSL_PKEY_DSA_SIGN;
548 }
549#ifndef OPENSSL_NO_EC
550 else if (i == EVP_PKEY_EC)
551 {
552 ret = SSL_PKEY_ECC;
553 }
554#endif
555 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
556 {
557 ret = SSL_PKEY_GOST94;
558 }
559 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
560 {
561 ret = SSL_PKEY_GOST01;
562 }
563err:
564 if(!pkey) EVP_PKEY_free(pk);
565 return(ret);
566 }
567
568int ssl_verify_alarm_type(long type)
569 {
570 int al;
571
572 switch(type)
573 {
574 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
575 case X509_V_ERR_UNABLE_TO_GET_CRL:
576 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
577 al=SSL_AD_UNKNOWN_CA;
578 break;
579 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
580 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
581 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
582 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
583 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
584 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
585 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
586 case X509_V_ERR_CERT_NOT_YET_VALID:
587 case X509_V_ERR_CRL_NOT_YET_VALID:
588 case X509_V_ERR_CERT_UNTRUSTED:
589 case X509_V_ERR_CERT_REJECTED:
590 al=SSL_AD_BAD_CERTIFICATE;
591 break;
592 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
593 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
594 al=SSL_AD_DECRYPT_ERROR;
595 break;
596 case X509_V_ERR_CERT_HAS_EXPIRED:
597 case X509_V_ERR_CRL_HAS_EXPIRED:
598 al=SSL_AD_CERTIFICATE_EXPIRED;
599 break;
600 case X509_V_ERR_CERT_REVOKED:
601 al=SSL_AD_CERTIFICATE_REVOKED;
602 break;
603 case X509_V_ERR_OUT_OF_MEM:
604 al=SSL_AD_INTERNAL_ERROR;
605 break;
606 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
607 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
608 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
609 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
610 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
611 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
612 case X509_V_ERR_INVALID_CA:
613 al=SSL_AD_UNKNOWN_CA;
614 break;
615 case X509_V_ERR_APPLICATION_VERIFICATION:
616 al=SSL_AD_HANDSHAKE_FAILURE;
617 break;
618 case X509_V_ERR_INVALID_PURPOSE:
619 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
620 break;
621 default:
622 al=SSL_AD_CERTIFICATE_UNKNOWN;
623 break;
624 }
625 return(al);
626 }
627
628#ifndef OPENSSL_NO_BUF_FREELISTS
629/* On some platforms, malloc() performance is bad enough that you can't just
630 * free() and malloc() buffers all the time, so we need to use freelists from
631 * unused buffers. Currently, each freelist holds memory chunks of only a
632 * given size (list->chunklen); other sized chunks are freed and malloced.
633 * This doesn't help much if you're using many different SSL option settings
634 * with a given context. (The options affecting buffer size are
635 * max_send_fragment, read buffer vs write buffer,
636 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
637 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
638 * possible size is not an option, since max_send_fragment can take on many
639 * different values.
640 *
641 * If you are on a platform with a slow malloc(), and you're using SSL
642 * connections with many different settings for these options, and you need to
643 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
644 * - Link against a faster malloc implementation.
645 * - Use a separate SSL_CTX for each option set.
646 * - Improve this code.
647 */
648static void *
649freelist_extract(SSL_CTX *ctx, int for_read, int sz)
650 {
651 SSL3_BUF_FREELIST *list;
652 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
653 void *result = NULL;
654
655 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
656 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
657 if (list != NULL && sz == (int)list->chunklen)
658 ent = list->head;
659 if (ent != NULL)
660 {
661 list->head = ent->next;
662 result = ent;
663 if (--list->len == 0)
664 list->chunklen = 0;
665 }
666 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
667 if (!result)
668 result = OPENSSL_malloc(sz);
669 return result;
670}
671
672static void
673freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
674 {
675 SSL3_BUF_FREELIST *list;
676 SSL3_BUF_FREELIST_ENTRY *ent;
677
678 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
679 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
680 if (list != NULL &&
681 (sz == list->chunklen || list->chunklen == 0) &&
682 list->len < ctx->freelist_max_len &&
683 sz >= sizeof(*ent))
684 {
685 list->chunklen = sz;
686 ent = mem;
687 ent->next = list->head;
688 list->head = ent;
689 ++list->len;
690 mem = NULL;
691 }
692
693 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
694 if (mem)
695 OPENSSL_free(mem);
696 }
697#else
698#define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
699#define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
700#endif
701
702int ssl3_setup_read_buffer(SSL *s)
703 {
704 unsigned char *p;
705 size_t len,align=0,headerlen;
706
707 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
708 headerlen = DTLS1_RT_HEADER_LENGTH;
709 else
710 headerlen = SSL3_RT_HEADER_LENGTH;
711
712#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
713 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
714#endif
715
716 if (s->s3->rbuf.buf == NULL)
717 {
718 len = SSL3_RT_MAX_PLAIN_LENGTH
719 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
720 + headerlen + align;
721 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
722 {
723 s->s3->init_extra = 1;
724 len += SSL3_RT_MAX_EXTRA;
725 }
726#ifndef OPENSSL_NO_COMP
727 if (!(s->options & SSL_OP_NO_COMPRESSION))
728 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
729#endif
730 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
731 goto err;
732 s->s3->rbuf.buf = p;
733 s->s3->rbuf.len = len;
734 }
735
736 s->packet= &(s->s3->rbuf.buf[0]);
737 return 1;
738
739err:
740 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
741 return 0;
742 }
743
744int ssl3_setup_write_buffer(SSL *s)
745 {
746 unsigned char *p;
747 size_t len,align=0,headerlen;
748
749 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
750 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
751 else
752 headerlen = SSL3_RT_HEADER_LENGTH;
753
754#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
755 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
756#endif
757
758 if (s->s3->wbuf.buf == NULL)
759 {
760 len = s->max_send_fragment
761 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
762 + headerlen + align;
763#ifndef OPENSSL_NO_COMP
764 if (!(s->options & SSL_OP_NO_COMPRESSION))
765 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
766#endif
767 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
768 len += headerlen + align
769 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
770
771 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
772 goto err;
773 s->s3->wbuf.buf = p;
774 s->s3->wbuf.len = len;
775 }
776
777 return 1;
778
779err:
780 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
781 return 0;
782 }
783
784
785int ssl3_setup_buffers(SSL *s)
786 {
787 if (!ssl3_setup_read_buffer(s))
788 return 0;
789 if (!ssl3_setup_write_buffer(s))
790 return 0;
791 return 1;
792 }
793
794int ssl3_release_write_buffer(SSL *s)
795 {
796 if (s->s3->wbuf.buf != NULL)
797 {
798 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
799 s->s3->wbuf.buf = NULL;
800 }
801 return 1;
802 }
803
804int ssl3_release_read_buffer(SSL *s)
805 {
806 if (s->s3->rbuf.buf != NULL)
807 {
808 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
809 s->s3->rbuf.buf = NULL;
810 }
811 return 1;
812 }
813
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-10-24 20:49:27 +0000