2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
112 #define REUSE_CIPHER_BUG
113 #define NETSCAPE_HANG_BUG
117 #include <openssl/buffer.h>
118 #include <openssl/rand.h>
119 #include <openssl/objects.h>
120 #include <openssl/evp.h>
121 #include <openssl/x509.h>
122 #include <openssl/krb5_asn.h>
123 #include "ssl_locl.h"
124 #include "kssl_lcl.h"
125 #include <openssl/md5.h>
127 static SSL_METHOD *ssl3_get_server_method(int ver);
128 static int ssl3_get_client_hello(SSL *s);
129 static int ssl3_check_client_hello(SSL *s);
130 static int ssl3_send_server_hello(SSL *s);
131 static int ssl3_send_server_key_exchange(SSL *s);
132 static int ssl3_send_certificate_request(SSL *s);
133 static int ssl3_send_server_done(SSL *s);
134 static int ssl3_get_client_key_exchange(SSL *s);
135 static int ssl3_get_client_certificate(SSL *s);
136 static int ssl3_get_cert_verify(SSL *s);
137 static int ssl3_send_hello_request(SSL *s);
139 static SSL_METHOD *ssl3_get_server_method(int ver)
141 if (ver == SSL3_VERSION)
142 return(SSLv3_server_method());
147 SSL_METHOD *SSLv3_server_method(void)
150 static SSL_METHOD SSLv3_server_data;
154 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
156 SSLv3_server_data.ssl_accept=ssl3_accept;
157 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
160 return(&SSLv3_server_data);
163 int ssl3_accept(SSL *s)
166 unsigned long l,Time=time(NULL);
167 void (*cb)(const SSL *ssl,int type,int val)=NULL;
170 int new_state,state,skip=0;
172 RAND_add(&Time,sizeof(Time),0);
176 if (s->info_callback != NULL)
178 else if (s->ctx->info_callback != NULL)
179 cb=s->ctx->info_callback;
181 /* init things to blank */
183 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
187 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
197 case SSL_ST_RENEGOTIATE:
199 /* s->state=SSL_ST_ACCEPT; */
203 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
204 case SSL_ST_OK|SSL_ST_ACCEPT:
207 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
209 if ((s->version>>8) != 3)
211 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
214 s->type=SSL_ST_ACCEPT;
216 if (s->init_buf == NULL)
218 if ((buf=BUF_MEM_new()) == NULL)
223 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
231 if (!ssl3_setup_buffers(s))
239 if (s->state != SSL_ST_RENEGOTIATE)
241 /* Ok, we now need to push on a buffering BIO so that
242 * the output is sent in a way that TCP likes :-)
244 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
246 ssl3_init_finished_mac(s);
247 s->state=SSL3_ST_SR_CLNT_HELLO_A;
248 s->ctx->stats.sess_accept++;
252 /* s->state == SSL_ST_RENEGOTIATE,
253 * we will just send a HelloRequest */
254 s->ctx->stats.sess_accept_renegotiate++;
255 s->state=SSL3_ST_SW_HELLO_REQ_A;
259 case SSL3_ST_SW_HELLO_REQ_A:
260 case SSL3_ST_SW_HELLO_REQ_B:
263 ret=ssl3_send_hello_request(s);
264 if (ret <= 0) goto end;
265 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
266 s->state=SSL3_ST_SW_FLUSH;
269 ssl3_init_finished_mac(s);
272 case SSL3_ST_SW_HELLO_REQ_C:
276 case SSL3_ST_SR_CLNT_HELLO_A:
277 case SSL3_ST_SR_CLNT_HELLO_B:
278 case SSL3_ST_SR_CLNT_HELLO_C:
281 ret=ssl3_get_client_hello(s);
282 if (ret <= 0) goto end;
284 s->state=SSL3_ST_SW_SRVR_HELLO_A;
288 case SSL3_ST_SW_SRVR_HELLO_A:
289 case SSL3_ST_SW_SRVR_HELLO_B:
290 ret=ssl3_send_server_hello(s);
291 if (ret <= 0) goto end;
294 s->state=SSL3_ST_SW_CHANGE_A;
296 s->state=SSL3_ST_SW_CERT_A;
300 case SSL3_ST_SW_CERT_A:
301 case SSL3_ST_SW_CERT_B:
302 /* Check if it is anon DH */
303 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
305 ret=ssl3_send_server_certificate(s);
306 if (ret <= 0) goto end;
310 s->state=SSL3_ST_SW_KEY_EXCH_A;
314 case SSL3_ST_SW_KEY_EXCH_A:
315 case SSL3_ST_SW_KEY_EXCH_B:
316 l=s->s3->tmp.new_cipher->algorithms;
318 /* clear this, it may get reset by
319 * send_server_key_exchange */
320 if ((s->options & SSL_OP_EPHEMERAL_RSA)
321 #ifndef OPENSSL_NO_KRB5
323 #endif /* OPENSSL_NO_KRB5 */
325 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
326 * even when forbidden by protocol specs
327 * (handshake may fail as clients are not required to
328 * be able to handle this) */
329 s->s3->tmp.use_rsa_tmp=1;
331 s->s3->tmp.use_rsa_tmp=0;
333 /* only send if a DH key exchange, fortezza or
334 * RSA but we have a sign only certificate */
335 if (s->s3->tmp.use_rsa_tmp
336 || (l & (SSL_DH|SSL_kFZA))
338 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
339 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
340 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
346 ret=ssl3_send_server_key_exchange(s);
347 if (ret <= 0) goto end;
352 s->state=SSL3_ST_SW_CERT_REQ_A;
356 case SSL3_ST_SW_CERT_REQ_A:
357 case SSL3_ST_SW_CERT_REQ_B:
358 if (/* don't request cert unless asked for it: */
359 !(s->verify_mode & SSL_VERIFY_PEER) ||
360 /* if SSL_VERIFY_CLIENT_ONCE is set,
361 * don't request cert during re-negotiation: */
362 ((s->session->peer != NULL) &&
363 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
364 /* never request cert in anonymous ciphersuites
365 * (see section "Certificate request" in SSL 3 drafts
366 * and in RFC 2246): */
367 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
368 /* ... except when the application insists on verification
369 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
370 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
371 /* never request cert in Kerberos ciphersuites */
372 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
374 /* no cert request */
376 s->s3->tmp.cert_request=0;
377 s->state=SSL3_ST_SW_SRVR_DONE_A;
381 s->s3->tmp.cert_request=1;
382 ret=ssl3_send_certificate_request(s);
383 if (ret <= 0) goto end;
384 #ifndef NETSCAPE_HANG_BUG
385 s->state=SSL3_ST_SW_SRVR_DONE_A;
387 s->state=SSL3_ST_SW_FLUSH;
388 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
394 case SSL3_ST_SW_SRVR_DONE_A:
395 case SSL3_ST_SW_SRVR_DONE_B:
396 ret=ssl3_send_server_done(s);
397 if (ret <= 0) goto end;
398 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
399 s->state=SSL3_ST_SW_FLUSH;
403 case SSL3_ST_SW_FLUSH:
404 /* number of bytes to be flushed */
405 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
408 s->rwstate=SSL_WRITING;
409 num1=BIO_flush(s->wbio);
410 if (num1 <= 0) { ret= -1; goto end; }
411 s->rwstate=SSL_NOTHING;
414 s->state=s->s3->tmp.next_state;
417 case SSL3_ST_SR_CERT_A:
418 case SSL3_ST_SR_CERT_B:
419 /* Check for second client hello (MS SGC) */
420 ret = ssl3_check_client_hello(s);
424 s->state = SSL3_ST_SR_CLNT_HELLO_C;
426 /* could be sent for a DH cert, even if we
427 * have not asked for it :-) */
428 ret=ssl3_get_client_certificate(s);
429 if (ret <= 0) goto end;
431 s->state=SSL3_ST_SR_KEY_EXCH_A;
435 case SSL3_ST_SR_KEY_EXCH_A:
436 case SSL3_ST_SR_KEY_EXCH_B:
437 ret=ssl3_get_client_key_exchange(s);
438 if (ret <= 0) goto end;
439 s->state=SSL3_ST_SR_CERT_VRFY_A;
442 /* We need to get hashes here so if there is
443 * a client cert, it can be verified */
444 s->method->ssl3_enc->cert_verify_mac(s,
445 &(s->s3->finish_dgst1),
446 &(s->s3->tmp.cert_verify_md[0]));
447 s->method->ssl3_enc->cert_verify_mac(s,
448 &(s->s3->finish_dgst2),
449 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
453 case SSL3_ST_SR_CERT_VRFY_A:
454 case SSL3_ST_SR_CERT_VRFY_B:
456 /* we should decide if we expected this one */
457 ret=ssl3_get_cert_verify(s);
458 if (ret <= 0) goto end;
460 s->state=SSL3_ST_SR_FINISHED_A;
464 case SSL3_ST_SR_FINISHED_A:
465 case SSL3_ST_SR_FINISHED_B:
466 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
467 SSL3_ST_SR_FINISHED_B);
468 if (ret <= 0) goto end;
472 s->state=SSL3_ST_SW_CHANGE_A;
476 case SSL3_ST_SW_CHANGE_A:
477 case SSL3_ST_SW_CHANGE_B:
479 s->session->cipher=s->s3->tmp.new_cipher;
480 if (!s->method->ssl3_enc->setup_key_block(s))
481 { ret= -1; goto end; }
483 ret=ssl3_send_change_cipher_spec(s,
484 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
486 if (ret <= 0) goto end;
487 s->state=SSL3_ST_SW_FINISHED_A;
490 if (!s->method->ssl3_enc->change_cipher_state(s,
491 SSL3_CHANGE_CIPHER_SERVER_WRITE))
499 case SSL3_ST_SW_FINISHED_A:
500 case SSL3_ST_SW_FINISHED_B:
501 ret=ssl3_send_finished(s,
502 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
503 s->method->ssl3_enc->server_finished_label,
504 s->method->ssl3_enc->server_finished_label_len);
505 if (ret <= 0) goto end;
506 s->state=SSL3_ST_SW_FLUSH;
508 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
510 s->s3->tmp.next_state=SSL_ST_OK;
515 /* clean a few things up */
516 ssl3_cleanup_key_block(s);
518 BUF_MEM_free(s->init_buf);
521 /* remove buffering on output */
522 ssl_free_wbio_buffer(s);
526 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
528 /* actually not necessarily a 'new' session unless
529 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
533 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
535 s->ctx->stats.sess_accept_good++;
537 s->handshake_func=ssl3_accept;
539 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
547 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
553 if (!s->s3->tmp.reuse_message && !skip)
557 if ((ret=BIO_flush(s->wbio)) <= 0)
562 if ((cb != NULL) && (s->state != state))
566 cb(s,SSL_CB_ACCEPT_LOOP,1);
573 /* BIO_flush(s->wbio); */
577 cb(s,SSL_CB_ACCEPT_EXIT,ret);
581 static int ssl3_send_hello_request(SSL *s)
585 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
587 p=(unsigned char *)s->init_buf->data;
588 *(p++)=SSL3_MT_HELLO_REQUEST;
593 s->state=SSL3_ST_SW_HELLO_REQ_B;
594 /* number of bytes to write */
599 /* SSL3_ST_SW_HELLO_REQ_B */
600 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
603 static int ssl3_check_client_hello(SSL *s)
608 /* this function is called when we really expect a Certificate message,
609 * so permit appropriate message length */
610 n=ssl3_get_message(s,
616 if (!ok) return((int)n);
617 s->s3->tmp.reuse_message = 1;
618 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
620 /* Throw away what we have done so far in the current handshake,
621 * which will now be aborted. (A full SSL_clear would be too much.)
622 * I hope that tmp.dh is the only thing that may need to be cleared
623 * when a handshake is not completed ... */
624 #ifndef OPENSSL_NO_DH
625 if (s->s3->tmp.dh != NULL)
627 DH_free(s->s3->tmp.dh);
628 s->s3->tmp.dh = NULL;
636 static int ssl3_get_client_hello(SSL *s)
638 int i,j,ok,al,ret= -1;
641 unsigned char *p,*d,*q;
644 STACK_OF(SSL_CIPHER) *ciphers=NULL;
646 /* We do this so that we will respond with our native type.
647 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
648 * This down switching should be handled by a different method.
649 * If we are SSLv3, we will respond with SSLv3, even if prompted with
652 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
655 s->state=SSL3_ST_SR_CLNT_HELLO_B;
657 n=ssl3_get_message(s,
658 SSL3_ST_SR_CLNT_HELLO_B,
659 SSL3_ST_SR_CLNT_HELLO_C,
660 SSL3_MT_CLIENT_HELLO,
661 SSL3_RT_MAX_PLAIN_LENGTH,
664 if (!ok) return((int)n);
665 d=p=(unsigned char *)s->init_msg;
667 /* use version from inside client hello, not from record header
668 * (may differ: see RFC 2246, Appendix E, second paragraph) */
669 s->client_version=(((int)p[0])<<8)|(int)p[1];
672 if (s->client_version < s->version)
674 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
675 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
677 /* similar to ssl3_get_record, send alert using remote version number */
678 s->version = s->client_version;
680 al = SSL_AD_PROTOCOL_VERSION;
684 /* load the client random */
685 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
688 /* get the session-id */
692 /* Versions before 0.9.7 always allow session reuse during renegotiation
693 * (i.e. when s->new_session is true), option
694 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
695 * Maybe this optional behaviour should always have been the default,
696 * but we cannot safely change the default behaviour (or new applications
697 * might be written that become totally unsecure when compiled with
698 * an earlier library version)
700 if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
702 if (!ssl_get_new_session(s,1))
707 i=ssl_get_prev_session(s,p,j);
709 { /* previous session */
716 if (!ssl_get_new_session(s,1))
723 if ((i == 0) && (j != 0))
725 /* we need a cipher if we are not resuming a session */
726 al=SSL_AD_ILLEGAL_PARAMETER;
727 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
732 /* not enough data */
733 al=SSL_AD_DECODE_ERROR;
734 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
737 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
744 /* If it is a hit, check that the cipher is in the list */
745 if ((s->hit) && (i > 0))
748 id=s->session->cipher->id;
751 printf("client sent %d ciphers\n",sk_num(ciphers));
753 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
755 c=sk_SSL_CIPHER_value(ciphers,i);
757 printf("client [%2d of %2d]:%s\n",
758 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
768 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
770 /* Very bad for multi-threading.... */
771 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
776 /* we need to have the cipher in the cipher
777 * list if we are asked to reuse it */
778 al=SSL_AD_ILLEGAL_PARAMETER;
779 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
789 /* not enough data */
790 al=SSL_AD_DECODE_ERROR;
791 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
797 if (p[j] == 0) break;
804 al=SSL_AD_DECODE_ERROR;
805 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
809 /* Worst case, we will use the NULL compression, but if we have other
810 * options, we will now look for them. We have i-1 compression
811 * algorithms from the client, starting at q. */
812 s->s3->tmp.new_compression=NULL;
813 if (s->ctx->comp_methods != NULL)
814 { /* See if we have a match */
817 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
820 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
833 s->s3->tmp.new_compression=comp;
838 /* TLS does not mind if there is extra stuff */
839 if (s->version == SSL3_VERSION)
843 /* wrong number of bytes,
844 * there could be more to follow */
845 al=SSL_AD_DECODE_ERROR;
846 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
851 /* Given s->session->ciphers and SSL_get_ciphers, we must
856 s->session->compress_meth=(comp == NULL)?0:comp->id;
857 if (s->session->ciphers != NULL)
858 sk_SSL_CIPHER_free(s->session->ciphers);
859 s->session->ciphers=ciphers;
862 al=SSL_AD_ILLEGAL_PARAMETER;
863 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
867 c=ssl3_choose_cipher(s,s->session->ciphers,
872 al=SSL_AD_HANDSHAKE_FAILURE;
873 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
876 s->s3->tmp.new_cipher=c;
880 /* Session-id reuse */
881 #ifdef REUSE_CIPHER_BUG
882 STACK_OF(SSL_CIPHER) *sk;
886 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
888 sk=s->session->ciphers;
889 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
891 c=sk_SSL_CIPHER_value(sk,i);
892 if (c->algorithms & SSL_eNULL)
894 if (SSL_C_IS_EXPORT(c))
898 s->s3->tmp.new_cipher=nc;
900 s->s3->tmp.new_cipher=ec;
902 s->s3->tmp.new_cipher=s->session->cipher;
906 s->s3->tmp.new_cipher=s->session->cipher;
909 /* we now have the following setup.
911 * cipher_list - our prefered list of ciphers
912 * ciphers - the clients prefered list of ciphers
913 * compression - basically ignored right now
914 * ssl version is set - sslv3
915 * s->session - The ssl session has been setup.
916 * s->hit - session reuse flag
917 * s->tmp.new_cipher - the new cipher to use.
924 ssl3_send_alert(s,SSL3_AL_FATAL,al);
927 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
931 static int ssl3_send_server_hello(SSL *s)
936 unsigned long l,Time;
938 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
940 buf=(unsigned char *)s->init_buf->data;
941 p=s->s3->server_random;
942 Time=time(NULL); /* Time */
944 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
945 /* Do the message type and length last */
948 *(p++)=s->version>>8;
949 *(p++)=s->version&0xff;
952 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
955 /* now in theory we have 3 options to sending back the
956 * session id. If it is a re-use, we send back the
957 * old session-id, if it is a new session, we send
958 * back the new session-id or we send back a 0 length
959 * session-id if we want it to be single use.
960 * Currently I will not implement the '0' length session-id
961 * 12-Jan-98 - I'll now support the '0' length stuff.
963 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
964 s->session->session_id_length=0;
966 sl=s->session->session_id_length;
968 memcpy(p,s->session->session_id,sl);
972 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
975 /* put the compression method */
976 if (s->s3->tmp.new_compression == NULL)
979 *(p++)=s->s3->tmp.new_compression->id;
984 *(d++)=SSL3_MT_SERVER_HELLO;
987 s->state=SSL3_ST_CW_CLNT_HELLO_B;
988 /* number of bytes to write */
993 /* SSL3_ST_CW_CLNT_HELLO_B */
994 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
997 static int ssl3_send_server_done(SSL *s)
1001 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1003 p=(unsigned char *)s->init_buf->data;
1006 *(p++)=SSL3_MT_SERVER_DONE;
1011 s->state=SSL3_ST_SW_SRVR_DONE_B;
1012 /* number of bytes to write */
1017 /* SSL3_ST_CW_CLNT_HELLO_B */
1018 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1021 static int ssl3_send_server_key_exchange(SSL *s)
1023 #ifndef OPENSSL_NO_RSA
1027 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1030 #ifndef OPENSSL_NO_DH
1034 unsigned char *p,*d;
1044 EVP_MD_CTX_init(&md_ctx);
1045 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1047 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
1052 r[0]=r[1]=r[2]=r[3]=NULL;
1054 #ifndef OPENSSL_NO_RSA
1055 if (type & SSL_kRSA)
1058 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1060 rsa=s->cert->rsa_tmp_cb(s,
1061 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1062 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1065 al=SSL_AD_HANDSHAKE_FAILURE;
1066 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1074 al=SSL_AD_HANDSHAKE_FAILURE;
1075 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1080 s->s3->tmp.use_rsa_tmp=1;
1084 #ifndef OPENSSL_NO_DH
1085 if (type & SSL_kEDH)
1088 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1089 dhp=s->cert->dh_tmp_cb(s,
1090 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1091 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1094 al=SSL_AD_HANDSHAKE_FAILURE;
1095 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1099 if (s->s3->tmp.dh != NULL)
1102 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1106 if ((dh=DHparams_dup(dhp)) == NULL)
1108 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1113 if ((dhp->pub_key == NULL ||
1114 dhp->priv_key == NULL ||
1115 (s->options & SSL_OP_SINGLE_DH_USE)))
1117 if(!DH_generate_key(dh))
1119 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1126 dh->pub_key=BN_dup(dhp->pub_key);
1127 dh->priv_key=BN_dup(dhp->priv_key);
1128 if ((dh->pub_key == NULL) ||
1129 (dh->priv_key == NULL))
1131 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1142 al=SSL_AD_HANDSHAKE_FAILURE;
1143 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1146 for (i=0; r[i] != NULL; i++)
1148 nr[i]=BN_num_bytes(r[i]);
1152 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1154 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1157 al=SSL_AD_DECODE_ERROR;
1160 kn=EVP_PKEY_size(pkey);
1168 if (!BUF_MEM_grow(buf,n+4+kn))
1170 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1173 d=(unsigned char *)s->init_buf->data;
1176 for (i=0; r[i] != NULL; i++)
1186 /* n is the length of the params, they start at &(d[4])
1187 * and p points to the space at the end. */
1188 #ifndef OPENSSL_NO_RSA
1189 if (pkey->type == EVP_PKEY_RSA)
1193 for (num=2; num > 0; num--)
1195 EVP_DigestInit_ex(&md_ctx,(num == 2)
1196 ?s->ctx->md5:s->ctx->sha1, NULL);
1197 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1198 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1199 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1200 EVP_DigestFinal_ex(&md_ctx,q,
1201 (unsigned int *)&i);
1205 if (RSA_sign(NID_md5_sha1, md_buf, j,
1206 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1208 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1216 #if !defined(OPENSSL_NO_DSA)
1217 if (pkey->type == EVP_PKEY_DSA)
1220 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1221 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1222 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1223 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1224 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1225 (unsigned int *)&i,pkey))
1227 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1236 /* Is this error check actually needed? */
1237 al=SSL_AD_HANDSHAKE_FAILURE;
1238 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1243 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1246 /* we should now have things packed up, so lets send
1252 s->state = SSL3_ST_SW_KEY_EXCH_B;
1253 EVP_MD_CTX_cleanup(&md_ctx);
1254 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1256 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1258 EVP_MD_CTX_cleanup(&md_ctx);
1262 static int ssl3_send_certificate_request(SSL *s)
1264 unsigned char *p,*d;
1266 STACK_OF(X509_NAME) *sk=NULL;
1270 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1274 d=p=(unsigned char *)&(buf->data[4]);
1276 /* get the list of acceptable cert types */
1278 n=ssl3_get_req_cert_type(s,p);
1287 sk=SSL_get_client_CA_list(s);
1291 for (i=0; i<sk_X509_NAME_num(sk); i++)
1293 name=sk_X509_NAME_value(sk,i);
1294 j=i2d_X509_NAME(name,NULL);
1295 if (!BUF_MEM_grow(buf,4+n+j+2))
1297 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1300 p=(unsigned char *)&(buf->data[4+n]);
1301 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1304 i2d_X509_NAME(name,&p);
1311 i2d_X509_NAME(name,&p);
1312 j-=2; s2n(j,d); j+=2;
1318 /* else no CA names */
1319 p=(unsigned char *)&(buf->data[4+off]);
1322 d=(unsigned char *)buf->data;
1323 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1326 /* we should now have things packed up, so lets send
1331 #ifdef NETSCAPE_HANG_BUG
1332 p=(unsigned char *)s->init_buf->data + s->init_num;
1335 *(p++)=SSL3_MT_SERVER_DONE;
1344 /* SSL3_ST_SW_CERT_REQ_B */
1345 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1350 static int ssl3_get_client_key_exchange(SSL *s)
1356 #ifndef OPENSSL_NO_RSA
1358 EVP_PKEY *pkey=NULL;
1360 #ifndef OPENSSL_NO_DH
1364 #ifndef OPENSSL_NO_KRB5
1366 #endif /* OPENSSL_NO_KRB5 */
1368 n=ssl3_get_message(s,
1369 SSL3_ST_SR_KEY_EXCH_A,
1370 SSL3_ST_SR_KEY_EXCH_B,
1371 SSL3_MT_CLIENT_KEY_EXCHANGE,
1375 if (!ok) return((int)n);
1376 p=(unsigned char *)s->init_msg;
1378 l=s->s3->tmp.new_cipher->algorithms;
1380 #ifndef OPENSSL_NO_RSA
1383 /* FIX THIS UP EAY EAY EAY EAY */
1384 if (s->s3->tmp.use_rsa_tmp)
1386 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1387 rsa=s->cert->rsa_tmp;
1388 /* Don't do a callback because rsa_tmp should
1389 * be sent already */
1392 al=SSL_AD_HANDSHAKE_FAILURE;
1393 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1400 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1401 if ( (pkey == NULL) ||
1402 (pkey->type != EVP_PKEY_RSA) ||
1403 (pkey->pkey.rsa == NULL))
1405 al=SSL_AD_HANDSHAKE_FAILURE;
1406 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1413 if (s->version > SSL3_VERSION)
1418 if (!(s->options & SSL_OP_TLS_D5_BUG))
1420 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1430 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1434 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1436 al=SSL_AD_DECODE_ERROR;
1437 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1440 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1442 /* The premaster secret must contain the same version number as the
1443 * ClientHello to detect version rollback attacks (strangely, the
1444 * protocol does not offer such protection for DH ciphersuites).
1445 * However, buggy clients exist that send the negotiated protocol
1446 * version instead if the server does not support the requested
1448 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1449 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1450 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1452 al=SSL_AD_DECODE_ERROR;
1453 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1463 /* Some decryption failure -- use random value instead as countermeasure
1464 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1465 * (see RFC 2246, section 7.4.7.1).
1466 * But note that due to length and protocol version checking, the
1467 * attack is impractical anyway (see section 5 in D. Bleichenbacher:
1468 * "Chosen Ciphertext Attacks Against Protocols Based on the RSA
1469 * Encryption Standard PKCS #1", CRYPTO '98, LNCS 1462, pp. 1-12).
1472 i = SSL_MAX_MASTER_KEY_LENGTH;
1473 p[0] = s->client_version >> 8;
1474 p[1] = s->client_version & 0xff;
1475 RAND_pseudo_bytes(p+2, i-2); /* should be RAND_bytes, but we cannot work around a failure */
1479 s->session->master_key_length=
1480 s->method->ssl3_enc->generate_master_secret(s,
1481 s->session->master_key,
1487 #ifndef OPENSSL_NO_DH
1488 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1493 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1495 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1505 if (n == 0L) /* the parameters are in the cert */
1507 al=SSL_AD_HANDSHAKE_FAILURE;
1508 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1513 if (s->s3->tmp.dh == NULL)
1515 al=SSL_AD_HANDSHAKE_FAILURE;
1516 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1520 dh_srvr=s->s3->tmp.dh;
1523 pub=BN_bin2bn(p,i,NULL);
1526 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1530 i=DH_compute_key(p,pub,dh_srvr);
1534 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1538 DH_free(s->s3->tmp.dh);
1543 s->session->master_key_length=
1544 s->method->ssl3_enc->generate_master_secret(s,
1545 s->session->master_key,p,i);
1550 #ifndef OPENSSL_NO_KRB5
1553 krb5_error_code krb5rc;
1554 krb5_data enc_ticket;
1555 krb5_data authenticator;
1557 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1558 EVP_CIPHER_CTX ciph_ctx;
1559 EVP_CIPHER *enc = NULL;
1560 unsigned char iv[EVP_MAX_IV_LENGTH];
1561 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1562 + EVP_MAX_IV_LENGTH + 1];
1563 int padl, outl = sizeof(pms);
1564 krb5_timestamp authtime = 0;
1565 krb5_ticket_times ttimes;
1567 EVP_CIPHER_CTX_init(&ciph_ctx);
1569 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1572 enc_ticket.length = i;
1573 enc_ticket.data = (char *)p;
1574 p+=enc_ticket.length;
1577 authenticator.length = i;
1578 authenticator.data = (char *)p;
1579 p+=authenticator.length;
1583 enc_pms.data = (char *)p;
1586 if (n != enc_ticket.length + authenticator.length +
1589 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1590 SSL_R_DATA_LENGTH_TOO_LONG);
1594 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1598 printf("kssl_sget_tkt rtn %d [%d]\n",
1599 krb5rc, kssl_err.reason);
1601 printf("kssl_err text= %s\n", kssl_err.text);
1602 #endif /* KSSL_DEBUG */
1603 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1608 /* Note: no authenticator is not considered an error,
1609 ** but will return authtime == 0.
1611 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
1612 &authtime, &kssl_err)) != 0)
1615 printf("kssl_check_authent rtn %d [%d]\n",
1616 krb5rc, kssl_err.reason);
1618 printf("kssl_err text= %s\n", kssl_err.text);
1619 #endif /* KSSL_DEBUG */
1620 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1625 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
1627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, krb5rc);
1632 kssl_ctx_show(kssl_ctx);
1633 #endif /* KSSL_DEBUG */
1635 enc = kssl_map_enc(kssl_ctx->enctype);
1639 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1641 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
1643 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1644 SSL_R_DECRYPTION_FAILED);
1647 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
1648 (unsigned char *)enc_pms.data, enc_pms.length))
1650 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1651 SSL_R_DECRYPTION_FAILED);
1654 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1656 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1657 SSL_R_DATA_LENGTH_TOO_LONG);
1660 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
1662 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1663 SSL_R_DECRYPTION_FAILED);
1667 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1669 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1670 SSL_R_DATA_LENGTH_TOO_LONG);
1673 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1675 s->session->master_key_length=
1676 s->method->ssl3_enc->generate_master_secret(s,
1677 s->session->master_key, pms, outl);
1679 if (kssl_ctx->client_princ)
1681 int len = strlen(kssl_ctx->client_princ);
1682 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
1684 s->session->krb5_client_princ_len = len;
1685 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
1690 /* Was doing kssl_ctx_free() here,
1691 ** but it caused problems for apache.
1692 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
1693 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
1697 #endif /* OPENSSL_NO_KRB5 */
1699 al=SSL_AD_HANDSHAKE_FAILURE;
1700 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1701 SSL_R_UNKNOWN_CIPHER_TYPE);
1707 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1708 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA)
1714 static int ssl3_get_cert_verify(SSL *s)
1716 EVP_PKEY *pkey=NULL;
1723 n=ssl3_get_message(s,
1724 SSL3_ST_SR_CERT_VRFY_A,
1725 SSL3_ST_SR_CERT_VRFY_B,
1730 if (!ok) return((int)n);
1732 if (s->session->peer != NULL)
1734 peer=s->session->peer;
1735 pkey=X509_get_pubkey(peer);
1736 type=X509_certificate_type(peer,pkey);
1744 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1746 s->s3->tmp.reuse_message=1;
1747 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1749 al=SSL_AD_UNEXPECTED_MESSAGE;
1750 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1759 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1760 al=SSL_AD_UNEXPECTED_MESSAGE;
1764 if (!(type & EVP_PKT_SIGN))
1766 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1767 al=SSL_AD_ILLEGAL_PARAMETER;
1771 if (s->s3->change_cipher_spec)
1773 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1774 al=SSL_AD_UNEXPECTED_MESSAGE;
1778 /* we now have a signature that we need to verify */
1779 p=(unsigned char *)s->init_msg;
1784 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1785 al=SSL_AD_DECODE_ERROR;
1789 j=EVP_PKEY_size(pkey);
1790 if ((i > j) || (n > j) || (n <= 0))
1792 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1793 al=SSL_AD_DECODE_ERROR;
1797 #ifndef OPENSSL_NO_RSA
1798 if (pkey->type == EVP_PKEY_RSA)
1800 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1801 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1805 al=SSL_AD_DECRYPT_ERROR;
1806 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1811 al=SSL_AD_DECRYPT_ERROR;
1812 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1818 #ifndef OPENSSL_NO_DSA
1819 if (pkey->type == EVP_PKEY_DSA)
1821 j=DSA_verify(pkey->save_type,
1822 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1823 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1827 al=SSL_AD_DECRYPT_ERROR;
1828 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1835 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
1836 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1845 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1848 EVP_PKEY_free(pkey);
1852 static int ssl3_get_client_certificate(SSL *s)
1854 int i,ok,al,ret= -1;
1856 unsigned long l,nc,llen,n;
1857 unsigned char *p,*d,*q;
1858 STACK_OF(X509) *sk=NULL;
1860 n=ssl3_get_message(s,
1867 if (!ok) return((int)n);
1869 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1871 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1872 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1874 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1875 al=SSL_AD_HANDSHAKE_FAILURE;
1878 /* If tls asked for a client cert, the client must return a 0 list */
1879 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1881 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1882 al=SSL_AD_UNEXPECTED_MESSAGE;
1885 s->s3->tmp.reuse_message=1;
1889 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1891 al=SSL_AD_UNEXPECTED_MESSAGE;
1892 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1895 d=p=(unsigned char *)s->init_msg;
1897 if ((sk=sk_X509_new_null()) == NULL)
1899 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1906 al=SSL_AD_DECODE_ERROR;
1907 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1910 for (nc=0; nc<llen; )
1913 if ((l+nc+3) > llen)
1915 al=SSL_AD_DECODE_ERROR;
1916 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1921 x=d2i_X509(NULL,&p,l);
1924 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1929 al=SSL_AD_DECODE_ERROR;
1930 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1933 if (!sk_X509_push(sk,x))
1935 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1942 if (sk_X509_num(sk) <= 0)
1944 /* TLS does not mind 0 certs returned */
1945 if (s->version == SSL3_VERSION)
1947 al=SSL_AD_HANDSHAKE_FAILURE;
1948 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1951 /* Fail for TLS only if we required a certificate */
1952 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1953 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1955 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1956 al=SSL_AD_HANDSHAKE_FAILURE;
1962 i=ssl_verify_cert_chain(s,sk);
1965 al=ssl_verify_alarm_type(s->verify_result);
1966 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1971 if (s->session->peer != NULL) /* This should not be needed */
1972 X509_free(s->session->peer);
1973 s->session->peer=sk_X509_shift(sk);
1974 s->session->verify_result = s->verify_result;
1976 /* With the current implementation, sess_cert will always be NULL
1977 * when we arrive here. */
1978 if (s->session->sess_cert == NULL)
1980 s->session->sess_cert = ssl_sess_cert_new();
1981 if (s->session->sess_cert == NULL)
1983 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1987 if (s->session->sess_cert->cert_chain != NULL)
1988 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1989 s->session->sess_cert->cert_chain=sk;
1990 /* Inconsistency alert: cert_chain does *not* include the
1991 * peer's own certificate, while we do include it in s3_clnt.c */
1999 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2002 if (x != NULL) X509_free(x);
2003 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
2007 int ssl3_send_server_certificate(SSL *s)
2012 if (s->state == SSL3_ST_SW_CERT_A)
2014 x=ssl_get_server_send_cert(s);
2016 /* VRS: allow null cert if auth == KRB5 */
2017 (s->s3->tmp.new_cipher->algorithms
2018 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
2019 != (SSL_aKRB5|SSL_kKRB5))
2021 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2025 l=ssl3_output_cert_chain(s,x);
2026 s->state=SSL3_ST_SW_CERT_B;
2031 /* SSL3_ST_SW_CERT_B */
2032 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));