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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
205#ifndef OPENSSL_NO_NEXTPROTONEG
206/* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
207static void ssl3_take_mac(SSL *s) {
208 const char *sender;
209 int slen;
210
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 change
235 * cipher spec message and is in s->s3->tmp.peer_finish_md. */
236#endif
237
238 n=s->method->ssl_get_message(s,
239 a,
240 b,
241 SSL3_MT_FINISHED,
242 64, /* should actually be 36+4 :-) */
243 &ok);
244
245 if (!ok) return((int)n);
246
247 /* If this occurs, we have missed a message */
248 if (!s->s3->change_cipher_spec)
249 {
250 al=SSL_AD_UNEXPECTED_MESSAGE;
251 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
252 goto f_err;
253 }
254 s->s3->change_cipher_spec=0;
255
256 p = (unsigned char *)s->init_msg;
257 i = s->s3->tmp.peer_finish_md_len;
258
259 if (i != n)
260 {
261 al=SSL_AD_DECODE_ERROR;
262 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
263 goto f_err;
264 }
265
266 if (timingsafe_bcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
267 {
268 al=SSL_AD_DECRYPT_ERROR;
269 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
270 goto f_err;
271 }
272
273 /* Copy the finished so we can use it for
274 renegotiation checks */
275 if(s->type == SSL_ST_ACCEPT)
276 {
277 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
278 memcpy(s->s3->previous_client_finished,
279 s->s3->tmp.peer_finish_md, i);
280 s->s3->previous_client_finished_len=i;
281 }
282 else
283 {
284 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
285 memcpy(s->s3->previous_server_finished,
286 s->s3->tmp.peer_finish_md, i);
287 s->s3->previous_server_finished_len=i;
288 }
289
290 return(1);
291f_err:
292 ssl3_send_alert(s,SSL3_AL_FATAL,al);
293 return(0);
294 }
295
296/* for these 2 messages, we need to
297 * ssl->enc_read_ctx re-init
298 * ssl->s3->read_sequence zero
299 * ssl->s3->read_mac_secret re-init
300 * ssl->session->read_sym_enc assign
301 * ssl->session->read_compression assign
302 * ssl->session->read_hash assign
303 */
304int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
305 {
306 unsigned char *p;
307
308 if (s->state == a)
309 {
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
322static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
323 {
324 int n;
325 unsigned char *p;
326
327 n=i2d_X509(x,NULL);
328 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
329 {
330 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
331 return(-1);
332 }
333 p=(unsigned char *)&(buf->data[*l]);
334 l2n3(n,p);
335 i2d_X509(x,&p);
336 *l+=n+3;
337
338 return(0);
339 }
340
341unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
342 {
343 unsigned char *p;
344 int i;
345 unsigned long l=7;
346 BUF_MEM *buf;
347 int no_chain;
348
349 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
350 no_chain = 1;
351 else
352 no_chain = 0;
353
354 /* TLSv1 sends a chain with nothing in it, instead of an alert */
355 buf=s->init_buf;
356 if (!BUF_MEM_grow_clean(buf,10))
357 {
358 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
359 return(0);
360 }
361 if (x != NULL)
362 {
363 if (no_chain)
364 {
365 if (ssl3_add_cert_to_buf(buf, &l, x))
366 return(0);
367 }
368 else
369 {
370 X509_STORE_CTX xs_ctx;
371
372 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
373 {
374 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
375 return(0);
376 }
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 {
382 x = sk_X509_value(xs_ctx.chain, i);
383
384 if (ssl3_add_cert_to_buf(buf, &l, x))
385 {
386 X509_STORE_CTX_cleanup(&xs_ctx);
387 return 0;
388 }
389 }
390 X509_STORE_CTX_cleanup(&xs_ctx);
391 }
392 }
393 /* Thawte special :-) */
394 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
395 {
396 x=sk_X509_value(s->ctx->extra_certs,i);
397 if (ssl3_add_cert_to_buf(buf, &l, x))
398 return(0);
399 }
400
401 l-=7;
402 p=(unsigned char *)&(buf->data[4]);
403 l2n3(l,p);
404 l+=3;
405 p=(unsigned char *)&(buf->data[0]);
406 *(p++)=SSL3_MT_CERTIFICATE;
407 l2n3(l,p);
408 l+=4;
409 return(l);
410 }
411
412/* Obtain handshake message of message type 'mt' (any if mt == -1),
413 * maximum acceptable body length 'max'.
414 * The first four bytes (msg_type and length) are read in state 'st1',
415 * the body is read in state 'stn'.
416 */
417long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
418 {
419 unsigned char *p;
420 unsigned long l;
421 long n;
422 int i,al;
423
424 if (s->s3->tmp.reuse_message)
425 {
426 s->s3->tmp.reuse_message=0;
427 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
428 {
429 al=SSL_AD_UNEXPECTED_MESSAGE;
430 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
431 goto f_err;
432 }
433 *ok=1;
434 s->init_msg = s->init_buf->data + 4;
435 s->init_num = (int)s->s3->tmp.message_size;
436 return s->init_num;
437 }
438
439 p=(unsigned char *)s->init_buf->data;
440
441 if (s->state == st1) /* s->init_num < 4 */
442 {
443 int skip_message;
444
445 do
446 {
447 while (s->init_num < 4)
448 {
449 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
450 &p[s->init_num],4 - s->init_num, 0);
451 if (i <= 0)
452 {
453 s->rwstate=SSL_READING;
454 *ok = 0;
455 return i;
456 }
457 s->init_num+=i;
458 }
459
460 skip_message = 0;
461 if (!s->server)
462 if (p[0] == SSL3_MT_HELLO_REQUEST)
463 /* The server may always send 'Hello Request' messages --
464 * we are doing a handshake anyway now, so ignore them
465 * if their format is correct. Does not count for
466 * 'Finished' MAC. */
467 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
468 {
469 s->init_num = 0;
470 skip_message = 1;
471
472 if (s->msg_callback)
473 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
474 }
475 }
476 while (skip_message);
477
478 /* s->init_num == 4 */
479
480 if ((mt >= 0) && (*p != mt))
481 {
482 al=SSL_AD_UNEXPECTED_MESSAGE;
483 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
484 goto f_err;
485 }
486 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
487 (st1 == SSL3_ST_SR_CERT_A) &&
488 (stn == SSL3_ST_SR_CERT_B))
489 {
490 /* At this point we have got an MS SGC second client
491 * hello (maybe we should always allow the client to
492 * start a new handshake?). We need to restart the mac.
493 * Don't increment {num,total}_renegotiations because
494 * we have not completed the handshake. */
495 ssl3_init_finished_mac(s);
496 }
497
498 s->s3->tmp.message_type= *(p++);
499
500 n2l3(p,l);
501 if (l > (unsigned long)max)
502 {
503 al=SSL_AD_ILLEGAL_PARAMETER;
504 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
505 goto f_err;
506 }
507 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
508 {
509 al=SSL_AD_ILLEGAL_PARAMETER;
510 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
511 goto f_err;
512 }
513 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
514 {
515 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
516 goto err;
517 }
518 s->s3->tmp.message_size=l;
519 s->state=stn;
520
521 s->init_msg = s->init_buf->data + 4;
522 s->init_num = 0;
523 }
524
525 /* next state (stn) */
526 p = s->init_msg;
527 n = s->s3->tmp.message_size - s->init_num;
528 while (n > 0)
529 {
530 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
531 if (i <= 0)
532 {
533 s->rwstate=SSL_READING;
534 *ok = 0;
535 return i;
536 }
537 s->init_num += i;
538 n -= i;
539 }
540#ifndef OPENSSL_NO_NEXTPROTONEG
541 /* If receiving Finished, record MAC of prior handshake messages for
542 * Finished verification. */
543 if (*s->init_buf->data == SSL3_MT_FINISHED)
544 ssl3_take_mac(s);
545#endif
546 /* Feed this message into MAC computation. */
547 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
548 if (s->msg_callback)
549 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
550 *ok=1;
551 return s->init_num;
552f_err:
553 ssl3_send_alert(s,SSL3_AL_FATAL,al);
554err:
555 *ok=0;
556 return(-1);
557 }
558
559int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
560 {
561 EVP_PKEY *pk;
562 int ret= -1,i;
563
564 if (pkey == NULL)
565 pk=X509_get_pubkey(x);
566 else
567 pk=pkey;
568 if (pk == NULL) goto err;
569
570 i=pk->type;
571 if (i == EVP_PKEY_RSA)
572 {
573 ret=SSL_PKEY_RSA_ENC;
574 }
575 else if (i == EVP_PKEY_DSA)
576 {
577 ret=SSL_PKEY_DSA_SIGN;
578 }
579#ifndef OPENSSL_NO_EC
580 else if (i == EVP_PKEY_EC)
581 {
582 ret = SSL_PKEY_ECC;
583 }
584#endif
585 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
586 {
587 ret = SSL_PKEY_GOST94;
588 }
589 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
590 {
591 ret = SSL_PKEY_GOST01;
592 }
593err:
594 if(!pkey) EVP_PKEY_free(pk);
595 return(ret);
596 }
597
598int ssl_verify_alarm_type(long type)
599 {
600 int al;
601
602 switch(type)
603 {
604 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
605 case X509_V_ERR_UNABLE_TO_GET_CRL:
606 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
607 al=SSL_AD_UNKNOWN_CA;
608 break;
609 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
610 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
611 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
612 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
613 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
614 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
615 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
616 case X509_V_ERR_CERT_NOT_YET_VALID:
617 case X509_V_ERR_CRL_NOT_YET_VALID:
618 case X509_V_ERR_CERT_UNTRUSTED:
619 case X509_V_ERR_CERT_REJECTED:
620 al=SSL_AD_BAD_CERTIFICATE;
621 break;
622 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
623 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
624 al=SSL_AD_DECRYPT_ERROR;
625 break;
626 case X509_V_ERR_CERT_HAS_EXPIRED:
627 case X509_V_ERR_CRL_HAS_EXPIRED:
628 al=SSL_AD_CERTIFICATE_EXPIRED;
629 break;
630 case X509_V_ERR_CERT_REVOKED:
631 al=SSL_AD_CERTIFICATE_REVOKED;
632 break;
633 case X509_V_ERR_OUT_OF_MEM:
634 al=SSL_AD_INTERNAL_ERROR;
635 break;
636 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
637 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
638 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
639 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
640 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
641 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
642 case X509_V_ERR_INVALID_CA:
643 al=SSL_AD_UNKNOWN_CA;
644 break;
645 case X509_V_ERR_APPLICATION_VERIFICATION:
646 al=SSL_AD_HANDSHAKE_FAILURE;
647 break;
648 case X509_V_ERR_INVALID_PURPOSE:
649 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
650 break;
651 default:
652 al=SSL_AD_CERTIFICATE_UNKNOWN;
653 break;
654 }
655 return(al);
656 }
657
658#ifndef OPENSSL_NO_BUF_FREELISTS
659/* On some platforms, malloc() performance is bad enough that you can't just
660 * free() and malloc() buffers all the time, so we need to use freelists from
661 * unused buffers. Currently, each freelist holds memory chunks of only a
662 * given size (list->chunklen); other sized chunks are freed and malloced.
663 * This doesn't help much if you're using many different SSL option settings
664 * with a given context. (The options affecting buffer size are
665 * max_send_fragment, read buffer vs write buffer,
666 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
667 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
668 * possible size is not an option, since max_send_fragment can take on many
669 * different values.
670 *
671 * If you are on a platform with a slow malloc(), and you're using SSL
672 * connections with many different settings for these options, and you need to
673 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
674 * - Link against a faster malloc implementation.
675 * - Use a separate SSL_CTX for each option set.
676 * - Improve this code.
677 */
678static void *
679freelist_extract(SSL_CTX *ctx, int for_read, int sz)
680 {
681 SSL3_BUF_FREELIST *list;
682 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
683 void *result = NULL;
684
685 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
686 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
687 if (list != NULL && sz == (int)list->chunklen)
688 ent = list->head;
689 if (ent != NULL)
690 {
691 list->head = ent->next;
692 result = ent;
693 if (--list->len == 0)
694 list->chunklen = 0;
695 }
696 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
697 if (!result)
698 result = OPENSSL_malloc(sz);
699 return result;
700}
701
702static void
703freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
704 {
705 SSL3_BUF_FREELIST *list;
706 SSL3_BUF_FREELIST_ENTRY *ent;
707
708 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
709 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
710 if (list != NULL &&
711 (sz == list->chunklen || list->chunklen == 0) &&
712 list->len < ctx->freelist_max_len &&
713 sz >= sizeof(*ent))
714 {
715 list->chunklen = sz;
716 ent = mem;
717 ent->next = list->head;
718 list->head = ent;
719 ++list->len;
720 mem = NULL;
721 }
722
723 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
724 if (mem)
725 OPENSSL_free(mem);
726 }
727#else
728#define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
729#define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
730#endif
731
732int ssl3_setup_read_buffer(SSL *s)
733 {
734 unsigned char *p;
735 size_t len,align=0,headerlen;
736
737 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
738 headerlen = DTLS1_RT_HEADER_LENGTH;
739 else
740 headerlen = SSL3_RT_HEADER_LENGTH;
741
742#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
743 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
744#endif
745
746 if (s->s3->rbuf.buf == NULL)
747 {
748 len = SSL3_RT_MAX_PLAIN_LENGTH
749 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
750 + headerlen + align;
751 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
752 {
753 s->s3->init_extra = 1;
754 len += SSL3_RT_MAX_EXTRA;
755 }
756#ifndef OPENSSL_NO_COMP
757 if (!(s->options & SSL_OP_NO_COMPRESSION))
758 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
759#endif
760 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
761 goto err;
762 s->s3->rbuf.buf = p;
763 s->s3->rbuf.len = len;
764 }
765
766 s->packet= &(s->s3->rbuf.buf[0]);
767 return 1;
768
769err:
770 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
771 return 0;
772 }
773
774int ssl3_setup_write_buffer(SSL *s)
775 {
776 unsigned char *p;
777 size_t len,align=0,headerlen;
778
779 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
780 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
781 else
782 headerlen = SSL3_RT_HEADER_LENGTH;
783
784#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
785 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
786#endif
787
788 if (s->s3->wbuf.buf == NULL)
789 {
790 len = s->max_send_fragment
791 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
792 + headerlen + align;
793#ifndef OPENSSL_NO_COMP
794 if (!(s->options & SSL_OP_NO_COMPRESSION))
795 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
796#endif
797 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
798 len += headerlen + align
799 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
800
801 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
802 goto err;
803 s->s3->wbuf.buf = p;
804 s->s3->wbuf.len = len;
805 }
806
807 return 1;
808
809err:
810 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
811 return 0;
812 }
813
814
815int ssl3_setup_buffers(SSL *s)
816 {
817 if (!ssl3_setup_read_buffer(s))
818 return 0;
819 if (!ssl3_setup_write_buffer(s))
820 return 0;
821 return 1;
822 }
823
824int ssl3_release_write_buffer(SSL *s)
825 {
826 if (s->s3->wbuf.buf != NULL)
827 {
828 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
829 s->s3->wbuf.buf = NULL;
830 }
831 return 1;
832 }
833
834int ssl3_release_read_buffer(SSL *s)
835 {
836 if (s->s3->rbuf.buf != NULL)
837 {
838 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
839 s->s3->rbuf.buf = NULL;
840 }
841 return 1;
842 }
843
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-11 20:17:57 +0000