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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 if (i == 0)
165 return 0;
166 s->s3->tmp.finish_md_len = i;
167 memcpy(p, s->s3->tmp.finish_md, i);
168 p+=i;
169 l=i;
170
171 /* Copy the finished so we can use it for
172 renegotiation checks */
173 if(s->type == SSL_ST_CONNECT)
174 {
175 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
176 memcpy(s->s3->previous_client_finished,
177 s->s3->tmp.finish_md, i);
178 s->s3->previous_client_finished_len=i;
179 }
180 else
181 {
182 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
183 memcpy(s->s3->previous_server_finished,
184 s->s3->tmp.finish_md, i);
185 s->s3->previous_server_finished_len=i;
186 }
187
188#ifdef OPENSSL_SYS_WIN16
189 /* MSVC 1.5 does not clear the top bytes of the word unless
190 * I do this.
191 */
192 l&=0xffff;
193#endif
194
195 *(d++)=SSL3_MT_FINISHED;
196 l2n3(l,d);
197 s->init_num=(int)l+4;
198 s->init_off=0;
199
200 s->state=b;
201 }
202
203 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
204 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
205 }
206
207#ifndef OPENSSL_NO_NEXTPROTONEG
208/* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
209static void ssl3_take_mac(SSL *s) {
210 const char *sender;
211 int slen;
212
213 /* If no new cipher setup return immediately: other functions will
214 * set the appropriate error.
215 */
216 if (s->s3->tmp.new_cipher == NULL)
217 return;
218 if (s->state & SSL_ST_CONNECT)
219 {
220 sender=s->method->ssl3_enc->server_finished_label;
221 slen=s->method->ssl3_enc->server_finished_label_len;
222 }
223 else
224 {
225 sender=s->method->ssl3_enc->client_finished_label;
226 slen=s->method->ssl3_enc->client_finished_label_len;
227 }
228
229 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
230 sender,slen,s->s3->tmp.peer_finish_md);
231}
232#endif
233
234int ssl3_get_finished(SSL *s, int a, int b)
235 {
236 int al,i,ok;
237 long n;
238 unsigned char *p;
239
240#ifdef OPENSSL_NO_NEXTPROTONEG
241 /* the mac has already been generated when we received the change
242 * cipher spec message and is in s->s3->tmp.peer_finish_md. */
243#endif
244
245 n=s->method->ssl_get_message(s,
246 a,
247 b,
248 SSL3_MT_FINISHED,
249 64, /* should actually be 36+4 :-) */
250 &ok);
251
252 if (!ok) return((int)n);
253
254 /* If this occurs, we have missed a message */
255 if (!s->s3->change_cipher_spec)
256 {
257 al=SSL_AD_UNEXPECTED_MESSAGE;
258 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
259 goto f_err;
260 }
261 s->s3->change_cipher_spec=0;
262
263 p = (unsigned char *)s->init_msg;
264 i = s->s3->tmp.peer_finish_md_len;
265
266 if (i != n)
267 {
268 al=SSL_AD_DECODE_ERROR;
269 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
270 goto f_err;
271 }
272
273 if (timingsafe_bcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
274 {
275 al=SSL_AD_DECRYPT_ERROR;
276 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
277 goto f_err;
278 }
279
280 /* Copy the finished so we can use it for
281 renegotiation checks */
282 if(s->type == SSL_ST_ACCEPT)
283 {
284 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
285 memcpy(s->s3->previous_client_finished,
286 s->s3->tmp.peer_finish_md, i);
287 s->s3->previous_client_finished_len=i;
288 }
289 else
290 {
291 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
292 memcpy(s->s3->previous_server_finished,
293 s->s3->tmp.peer_finish_md, i);
294 s->s3->previous_server_finished_len=i;
295 }
296
297 return(1);
298f_err:
299 ssl3_send_alert(s,SSL3_AL_FATAL,al);
300 return(0);
301 }
302
303/* for these 2 messages, we need to
304 * ssl->enc_read_ctx re-init
305 * ssl->s3->read_sequence zero
306 * ssl->s3->read_mac_secret re-init
307 * ssl->session->read_sym_enc assign
308 * ssl->session->read_compression assign
309 * ssl->session->read_hash assign
310 */
311int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
312 {
313 unsigned char *p;
314
315 if (s->state == a)
316 {
317 p=(unsigned char *)s->init_buf->data;
318 *p=SSL3_MT_CCS;
319 s->init_num=1;
320 s->init_off=0;
321
322 s->state=b;
323 }
324
325 /* SSL3_ST_CW_CHANGE_B */
326 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
327 }
328
329static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
330 {
331 int n;
332 unsigned char *p;
333
334 n=i2d_X509(x,NULL);
335 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
336 {
337 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
338 return(-1);
339 }
340 p=(unsigned char *)&(buf->data[*l]);
341 l2n3(n,p);
342 i2d_X509(x,&p);
343 *l+=n+3;
344
345 return(0);
346 }
347
348unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
349 {
350 unsigned char *p;
351 int i;
352 unsigned long l=7;
353 BUF_MEM *buf;
354 int no_chain;
355
356 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
357 no_chain = 1;
358 else
359 no_chain = 0;
360
361 /* TLSv1 sends a chain with nothing in it, instead of an alert */
362 buf=s->init_buf;
363 if (!BUF_MEM_grow_clean(buf,10))
364 {
365 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
366 return(0);
367 }
368 if (x != NULL)
369 {
370 if (no_chain)
371 {
372 if (ssl3_add_cert_to_buf(buf, &l, x))
373 return(0);
374 }
375 else
376 {
377 X509_STORE_CTX xs_ctx;
378
379 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
380 {
381 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
382 return(0);
383 }
384 X509_verify_cert(&xs_ctx);
385 /* Don't leave errors in the queue */
386 ERR_clear_error();
387 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
388 {
389 x = sk_X509_value(xs_ctx.chain, i);
390
391 if (ssl3_add_cert_to_buf(buf, &l, x))
392 {
393 X509_STORE_CTX_cleanup(&xs_ctx);
394 return 0;
395 }
396 }
397 X509_STORE_CTX_cleanup(&xs_ctx);
398 }
399 }
400 /* Thawte special :-) */
401 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
402 {
403 x=sk_X509_value(s->ctx->extra_certs,i);
404 if (ssl3_add_cert_to_buf(buf, &l, x))
405 return(0);
406 }
407
408 l-=7;
409 p=(unsigned char *)&(buf->data[4]);
410 l2n3(l,p);
411 l+=3;
412 p=(unsigned char *)&(buf->data[0]);
413 *(p++)=SSL3_MT_CERTIFICATE;
414 l2n3(l,p);
415 l+=4;
416 return(l);
417 }
418
419/* Obtain handshake message of message type 'mt' (any if mt == -1),
420 * maximum acceptable body length 'max'.
421 * The first four bytes (msg_type and length) are read in state 'st1',
422 * the body is read in state 'stn'.
423 */
424long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
425 {
426 unsigned char *p;
427 unsigned long l;
428 long n;
429 int i,al;
430
431 if (s->s3->tmp.reuse_message)
432 {
433 s->s3->tmp.reuse_message=0;
434 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
435 {
436 al=SSL_AD_UNEXPECTED_MESSAGE;
437 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
438 goto f_err;
439 }
440 *ok=1;
441 s->init_msg = s->init_buf->data + 4;
442 s->init_num = (int)s->s3->tmp.message_size;
443 return s->init_num;
444 }
445
446 p=(unsigned char *)s->init_buf->data;
447
448 if (s->state == st1) /* s->init_num < 4 */
449 {
450 int skip_message;
451
452 do
453 {
454 while (s->init_num < 4)
455 {
456 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
457 &p[s->init_num],4 - s->init_num, 0);
458 if (i <= 0)
459 {
460 s->rwstate=SSL_READING;
461 *ok = 0;
462 return i;
463 }
464 s->init_num+=i;
465 }
466
467 skip_message = 0;
468 if (!s->server)
469 if (p[0] == SSL3_MT_HELLO_REQUEST)
470 /* The server may always send 'Hello Request' messages --
471 * we are doing a handshake anyway now, so ignore them
472 * if their format is correct. Does not count for
473 * 'Finished' MAC. */
474 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
475 {
476 s->init_num = 0;
477 skip_message = 1;
478
479 if (s->msg_callback)
480 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
481 }
482 }
483 while (skip_message);
484
485 /* s->init_num == 4 */
486
487 if ((mt >= 0) && (*p != mt))
488 {
489 al=SSL_AD_UNEXPECTED_MESSAGE;
490 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
491 goto f_err;
492 }
493 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
494 (st1 == SSL3_ST_SR_CERT_A) &&
495 (stn == SSL3_ST_SR_CERT_B))
496 {
497 /* At this point we have got an MS SGC second client
498 * hello (maybe we should always allow the client to
499 * start a new handshake?). We need to restart the mac.
500 * Don't increment {num,total}_renegotiations because
501 * we have not completed the handshake. */
502 ssl3_init_finished_mac(s);
503 }
504
505 s->s3->tmp.message_type= *(p++);
506
507 n2l3(p,l);
508 if (l > (unsigned long)max)
509 {
510 al=SSL_AD_ILLEGAL_PARAMETER;
511 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
512 goto f_err;
513 }
514 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
515 {
516 al=SSL_AD_ILLEGAL_PARAMETER;
517 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
518 goto f_err;
519 }
520 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
521 {
522 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
523 goto err;
524 }
525 s->s3->tmp.message_size=l;
526 s->state=stn;
527
528 s->init_msg = s->init_buf->data + 4;
529 s->init_num = 0;
530 }
531
532 /* next state (stn) */
533 p = s->init_msg;
534 n = s->s3->tmp.message_size - s->init_num;
535 while (n > 0)
536 {
537 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
538 if (i <= 0)
539 {
540 s->rwstate=SSL_READING;
541 *ok = 0;
542 return i;
543 }
544 s->init_num += i;
545 n -= i;
546 }
547#ifndef OPENSSL_NO_NEXTPROTONEG
548 /* If receiving Finished, record MAC of prior handshake messages for
549 * Finished verification. */
550 if (*s->init_buf->data == SSL3_MT_FINISHED)
551 ssl3_take_mac(s);
552#endif
553 /* Feed this message into MAC computation. */
554 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
555 if (s->msg_callback)
556 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
557 *ok=1;
558 return s->init_num;
559f_err:
560 ssl3_send_alert(s,SSL3_AL_FATAL,al);
561err:
562 *ok=0;
563 return(-1);
564 }
565
566int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
567 {
568 EVP_PKEY *pk;
569 int ret= -1,i;
570
571 if (pkey == NULL)
572 pk=X509_get_pubkey(x);
573 else
574 pk=pkey;
575 if (pk == NULL) goto err;
576
577 i=pk->type;
578 if (i == EVP_PKEY_RSA)
579 {
580 ret=SSL_PKEY_RSA_ENC;
581 }
582 else if (i == EVP_PKEY_DSA)
583 {
584 ret=SSL_PKEY_DSA_SIGN;
585 }
586#ifndef OPENSSL_NO_EC
587 else if (i == EVP_PKEY_EC)
588 {
589 ret = SSL_PKEY_ECC;
590 }
591#endif
592 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
593 {
594 ret = SSL_PKEY_GOST94;
595 }
596 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
597 {
598 ret = SSL_PKEY_GOST01;
599 }
600err:
601 if(!pkey) EVP_PKEY_free(pk);
602 return(ret);
603 }
604
605int ssl_verify_alarm_type(long type)
606 {
607 int al;
608
609 switch(type)
610 {
611 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
612 case X509_V_ERR_UNABLE_TO_GET_CRL:
613 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
614 al=SSL_AD_UNKNOWN_CA;
615 break;
616 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
617 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
618 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
619 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
620 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
621 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
622 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
623 case X509_V_ERR_CERT_NOT_YET_VALID:
624 case X509_V_ERR_CRL_NOT_YET_VALID:
625 case X509_V_ERR_CERT_UNTRUSTED:
626 case X509_V_ERR_CERT_REJECTED:
627 al=SSL_AD_BAD_CERTIFICATE;
628 break;
629 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
630 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
631 al=SSL_AD_DECRYPT_ERROR;
632 break;
633 case X509_V_ERR_CERT_HAS_EXPIRED:
634 case X509_V_ERR_CRL_HAS_EXPIRED:
635 al=SSL_AD_CERTIFICATE_EXPIRED;
636 break;
637 case X509_V_ERR_CERT_REVOKED:
638 al=SSL_AD_CERTIFICATE_REVOKED;
639 break;
640 case X509_V_ERR_OUT_OF_MEM:
641 al=SSL_AD_INTERNAL_ERROR;
642 break;
643 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
644 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
645 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
646 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
647 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
648 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
649 case X509_V_ERR_INVALID_CA:
650 al=SSL_AD_UNKNOWN_CA;
651 break;
652 case X509_V_ERR_APPLICATION_VERIFICATION:
653 al=SSL_AD_HANDSHAKE_FAILURE;
654 break;
655 case X509_V_ERR_INVALID_PURPOSE:
656 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
657 break;
658 default:
659 al=SSL_AD_CERTIFICATE_UNKNOWN;
660 break;
661 }
662 return(al);
663 }
664
665#ifndef OPENSSL_NO_BUF_FREELISTS
666/* On some platforms, malloc() performance is bad enough that you can't just
667 * free() and malloc() buffers all the time, so we need to use freelists from
668 * unused buffers. Currently, each freelist holds memory chunks of only a
669 * given size (list->chunklen); other sized chunks are freed and malloced.
670 * This doesn't help much if you're using many different SSL option settings
671 * with a given context. (The options affecting buffer size are
672 * max_send_fragment, read buffer vs write buffer,
673 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
674 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
675 * possible size is not an option, since max_send_fragment can take on many
676 * different values.
677 *
678 * If you are on a platform with a slow malloc(), and you're using SSL
679 * connections with many different settings for these options, and you need to
680 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
681 * - Link against a faster malloc implementation.
682 * - Use a separate SSL_CTX for each option set.
683 * - Improve this code.
684 */
685static void *
686freelist_extract(SSL_CTX *ctx, int for_read, int sz)
687 {
688 SSL3_BUF_FREELIST *list;
689 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
690 void *result = NULL;
691
692 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
693 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
694 if (list != NULL && sz == (int)list->chunklen)
695 ent = list->head;
696 if (ent != NULL)
697 {
698 list->head = ent->next;
699 result = ent;
700 if (--list->len == 0)
701 list->chunklen = 0;
702 }
703 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
704 if (!result)
705 result = OPENSSL_malloc(sz);
706 return result;
707}
708
709static void
710freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
711 {
712 SSL3_BUF_FREELIST *list;
713 SSL3_BUF_FREELIST_ENTRY *ent;
714
715 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
716 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
717 if (list != NULL &&
718 (sz == list->chunklen || list->chunklen == 0) &&
719 list->len < ctx->freelist_max_len &&
720 sz >= sizeof(*ent))
721 {
722 list->chunklen = sz;
723 ent = mem;
724 ent->next = list->head;
725 list->head = ent;
726 ++list->len;
727 mem = NULL;
728 }
729
730 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
731 if (mem)
732 OPENSSL_free(mem);
733 }
734#else
735#define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
736#define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
737#endif
738
739int ssl3_setup_read_buffer(SSL *s)
740 {
741 unsigned char *p;
742 size_t len,align=0,headerlen;
743
744 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
745 headerlen = DTLS1_RT_HEADER_LENGTH;
746 else
747 headerlen = SSL3_RT_HEADER_LENGTH;
748
749#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
750 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
751#endif
752
753 if (s->s3->rbuf.buf == NULL)
754 {
755 len = SSL3_RT_MAX_PLAIN_LENGTH
756 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
757 + headerlen + align;
758 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
759 {
760 s->s3->init_extra = 1;
761 len += SSL3_RT_MAX_EXTRA;
762 }
763#ifndef OPENSSL_NO_COMP
764 if (!(s->options & SSL_OP_NO_COMPRESSION))
765 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
766#endif
767 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
768 goto err;
769 s->s3->rbuf.buf = p;
770 s->s3->rbuf.len = len;
771 }
772
773 s->packet= &(s->s3->rbuf.buf[0]);
774 return 1;
775
776err:
777 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
778 return 0;
779 }
780
781int ssl3_setup_write_buffer(SSL *s)
782 {
783 unsigned char *p;
784 size_t len,align=0,headerlen;
785
786 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
787 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
788 else
789 headerlen = SSL3_RT_HEADER_LENGTH;
790
791#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
792 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
793#endif
794
795 if (s->s3->wbuf.buf == NULL)
796 {
797 len = s->max_send_fragment
798 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
799 + headerlen + align;
800#ifndef OPENSSL_NO_COMP
801 if (!(s->options & SSL_OP_NO_COMPRESSION))
802 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
803#endif
804 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
805 len += headerlen + align
806 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
807
808 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
809 goto err;
810 s->s3->wbuf.buf = p;
811 s->s3->wbuf.len = len;
812 }
813
814 return 1;
815
816err:
817 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
818 return 0;
819 }
820
821
822int ssl3_setup_buffers(SSL *s)
823 {
824 if (!ssl3_setup_read_buffer(s))
825 return 0;
826 if (!ssl3_setup_write_buffer(s))
827 return 0;
828 return 1;
829 }
830
831int ssl3_release_write_buffer(SSL *s)
832 {
833 if (s->s3->wbuf.buf != NULL)
834 {
835 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
836 s->s3->wbuf.buf = NULL;
837 }
838 return 1;
839 }
840
841int ssl3_release_read_buffer(SSL *s)
842 {
843 if (s->s3->rbuf.buf != NULL)
844 {
845 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
846 s->s3->rbuf.buf = NULL;
847 }
848 return 1;
849 }
850
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-10-28 07:12:18 +0000