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.]
60 #include <openssl/buffer.h>
61 #include <openssl/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/md5.h>
64 #include <openssl/sha.h>
65 #include <openssl/evp.h>
68 static SSL_METHOD *ssl3_get_client_method(int ver);
69 static int ssl3_client_hello(SSL *s);
70 static int ssl3_get_server_hello(SSL *s);
71 static int ssl3_get_certificate_request(SSL *s);
72 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
73 static int ssl3_get_server_done(SSL *s);
74 static int ssl3_send_client_verify(SSL *s);
75 static int ssl3_send_client_certificate(SSL *s);
76 static int ssl3_send_client_key_exchange(SSL *s);
77 static int ssl3_get_key_exchange(SSL *s);
78 static int ssl3_get_server_certificate(SSL *s);
79 static int ssl3_check_cert_and_algorithm(SSL *s);
80 static SSL_METHOD *ssl3_get_client_method(int ver)
82 if (ver == SSL3_VERSION)
83 return(SSLv3_client_method());
88 SSL_METHOD *SSLv3_client_method(void)
91 static SSL_METHOD SSLv3_client_data;
96 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
98 SSLv3_client_data.ssl_connect=ssl3_connect;
99 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
101 return(&SSLv3_client_data);
104 int ssl3_connect(SSL *s)
107 unsigned long Time=time(NULL),l;
111 int new_state,state,skip=0;;
113 RAND_add(&Time,sizeof(Time),0);
117 if (s->info_callback != NULL)
119 else if (s->ctx->info_callback != NULL)
120 cb=s->ctx->info_callback;
122 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
131 case SSL_ST_RENEGOTIATE:
133 s->state=SSL_ST_CONNECT;
134 s->ctx->stats.sess_connect_renegotiate++;
138 case SSL_ST_BEFORE|SSL_ST_CONNECT:
139 case SSL_ST_OK|SSL_ST_CONNECT:
142 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
144 if ((s->version & 0xff00 ) != 0x0300)
146 /* s->version=SSL3_VERSION; */
147 s->type=SSL_ST_CONNECT;
149 if (s->init_buf == NULL)
151 if ((buf=BUF_MEM_new()) == NULL)
156 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
164 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
166 /* setup buffing BIO */
167 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
169 /* don't push the buffering BIO quite yet */
171 ssl3_init_finished_mac(s);
173 s->state=SSL3_ST_CW_CLNT_HELLO_A;
174 s->ctx->stats.sess_connect++;
178 case SSL3_ST_CW_CLNT_HELLO_A:
179 case SSL3_ST_CW_CLNT_HELLO_B:
182 ret=ssl3_client_hello(s);
183 if (ret <= 0) goto end;
184 s->state=SSL3_ST_CR_SRVR_HELLO_A;
187 /* turn on buffering for the next lot of output */
188 if (s->bbio != s->wbio)
189 s->wbio=BIO_push(s->bbio,s->wbio);
193 case SSL3_ST_CR_SRVR_HELLO_A:
194 case SSL3_ST_CR_SRVR_HELLO_B:
195 ret=ssl3_get_server_hello(s);
196 if (ret <= 0) goto end;
198 s->state=SSL3_ST_CR_FINISHED_A;
200 s->state=SSL3_ST_CR_CERT_A;
204 case SSL3_ST_CR_CERT_A:
205 case SSL3_ST_CR_CERT_B:
206 /* Check if it is anon DH */
207 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
209 ret=ssl3_get_server_certificate(s);
210 if (ret <= 0) goto end;
214 s->state=SSL3_ST_CR_KEY_EXCH_A;
218 case SSL3_ST_CR_KEY_EXCH_A:
219 case SSL3_ST_CR_KEY_EXCH_B:
220 ret=ssl3_get_key_exchange(s);
221 if (ret <= 0) goto end;
222 s->state=SSL3_ST_CR_CERT_REQ_A;
225 /* at this point we check that we have the
226 * required stuff from the server */
227 if (!ssl3_check_cert_and_algorithm(s))
234 case SSL3_ST_CR_CERT_REQ_A:
235 case SSL3_ST_CR_CERT_REQ_B:
236 ret=ssl3_get_certificate_request(s);
237 if (ret <= 0) goto end;
238 s->state=SSL3_ST_CR_SRVR_DONE_A;
242 case SSL3_ST_CR_SRVR_DONE_A:
243 case SSL3_ST_CR_SRVR_DONE_B:
244 ret=ssl3_get_server_done(s);
245 if (ret <= 0) goto end;
246 if (s->s3->tmp.cert_req)
247 s->state=SSL3_ST_CW_CERT_A;
249 s->state=SSL3_ST_CW_KEY_EXCH_A;
254 case SSL3_ST_CW_CERT_A:
255 case SSL3_ST_CW_CERT_B:
256 case SSL3_ST_CW_CERT_C:
257 case SSL3_ST_CW_CERT_D:
258 ret=ssl3_send_client_certificate(s);
259 if (ret <= 0) goto end;
260 s->state=SSL3_ST_CW_KEY_EXCH_A;
264 case SSL3_ST_CW_KEY_EXCH_A:
265 case SSL3_ST_CW_KEY_EXCH_B:
266 ret=ssl3_send_client_key_exchange(s);
267 if (ret <= 0) goto end;
268 l=s->s3->tmp.new_cipher->algorithms;
269 /* EAY EAY EAY need to check for DH fix cert
271 /* For TLS, cert_req is set to 2, so a cert chain
272 * of nothing is sent, but no verify packet is sent */
273 if (s->s3->tmp.cert_req == 1)
275 s->state=SSL3_ST_CW_CERT_VRFY_A;
279 s->state=SSL3_ST_CW_CHANGE_A;
280 s->s3->change_cipher_spec=0;
286 case SSL3_ST_CW_CERT_VRFY_A:
287 case SSL3_ST_CW_CERT_VRFY_B:
288 ret=ssl3_send_client_verify(s);
289 if (ret <= 0) goto end;
290 s->state=SSL3_ST_CW_CHANGE_A;
292 s->s3->change_cipher_spec=0;
295 case SSL3_ST_CW_CHANGE_A:
296 case SSL3_ST_CW_CHANGE_B:
297 ret=ssl3_send_change_cipher_spec(s,
298 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
299 if (ret <= 0) goto end;
300 s->state=SSL3_ST_CW_FINISHED_A;
303 s->session->cipher=s->s3->tmp.new_cipher;
304 if (s->s3->tmp.new_compression == NULL)
305 s->session->compress_meth=0;
307 s->session->compress_meth=
308 s->s3->tmp.new_compression->id;
309 if (!s->method->ssl3_enc->setup_key_block(s))
315 if (!s->method->ssl3_enc->change_cipher_state(s,
316 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
324 case SSL3_ST_CW_FINISHED_A:
325 case SSL3_ST_CW_FINISHED_B:
326 ret=ssl3_send_finished(s,
327 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
328 s->method->ssl3_enc->client_finished_label,
329 s->method->ssl3_enc->client_finished_label_len);
330 if (ret <= 0) goto end;
331 s->state=SSL3_ST_CW_FLUSH;
334 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
337 s->s3->tmp.next_state=SSL_ST_OK;
338 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
341 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
342 s->s3->delay_buf_pop_ret=0;
347 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
352 case SSL3_ST_CR_FINISHED_A:
353 case SSL3_ST_CR_FINISHED_B:
355 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
356 SSL3_ST_CR_FINISHED_B);
357 if (ret <= 0) goto end;
360 s->state=SSL3_ST_CW_CHANGE_A;
366 case SSL3_ST_CW_FLUSH:
367 /* number of bytes to be flushed */
368 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
371 s->rwstate=SSL_WRITING;
372 num1=BIO_flush(s->wbio);
373 if (num1 <= 0) { ret= -1; goto end; }
374 s->rwstate=SSL_NOTHING;
377 s->state=s->s3->tmp.next_state;
381 /* clean a few things up */
382 ssl3_cleanup_key_block(s);
384 if (s->init_buf != NULL)
386 BUF_MEM_free(s->init_buf);
390 /* If we are not 'joining' the last two packets,
391 * remove the buffering now */
392 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
393 ssl_free_wbio_buffer(s);
394 /* else do it later in ssl3_write */
399 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
400 if (s->hit) s->ctx->stats.sess_hit++;
404 s->handshake_func=ssl3_connect;
405 s->ctx->stats.sess_connect_good++;
407 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
413 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
419 /* did we do anything */
420 if (!s->s3->tmp.reuse_message && !skip)
424 if ((ret=BIO_flush(s->wbio)) <= 0)
428 if ((cb != NULL) && (s->state != state))
432 cb(s,SSL_CB_CONNECT_LOOP,1);
440 cb(s,SSL_CB_CONNECT_EXIT,ret);
446 static int ssl3_client_hello(SSL *s)
451 unsigned long Time,l;
454 buf=(unsigned char *)s->init_buf->data;
455 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
457 if ((s->session == NULL) ||
458 (s->session->ssl_version != s->version) ||
459 (s->session->not_resumable))
461 if (!ssl_get_new_session(s,0))
464 /* else use the pre-loaded session */
466 p=s->s3->client_random;
467 Time=time(NULL); /* Time */
469 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
471 /* Do the message type and length last */
474 *(p++)=s->version>>8;
475 *(p++)=s->version&0xff;
476 s->client_version=s->version;
479 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
486 i=s->session->session_id_length;
490 memcpy(p,s->session->session_id,i);
494 /* Ciphers supported */
495 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
498 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
505 if (s->ctx->comp_methods == NULL)
508 j=sk_SSL_COMP_num(s->ctx->comp_methods);
512 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
515 *(p++)=0; /* Add the NULL method */
519 *(d++)=SSL3_MT_CLIENT_HELLO;
522 s->state=SSL3_ST_CW_CLNT_HELLO_B;
523 /* number of bytes to write */
528 /* SSL3_ST_CW_CLNT_HELLO_B */
529 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
534 static int ssl3_get_server_hello(SSL *s)
536 STACK_OF(SSL_CIPHER) *sk;
544 n=ssl3_get_message(s,
545 SSL3_ST_CR_SRVR_HELLO_A,
546 SSL3_ST_CR_SRVR_HELLO_B,
547 SSL3_MT_SERVER_HELLO,
551 if (!ok) return((int)n);
552 d=p=(unsigned char *)s->init_buf->data;
554 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
556 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
557 s->version=(s->version&0xff00)|p[1];
558 al=SSL_AD_PROTOCOL_VERSION;
563 /* load the server hello data */
564 /* load the server random */
565 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
568 /* get the session-id */
571 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
573 /* SSLref returns 16 :-( */
574 if (j < SSL2_SSL_SESSION_ID_LENGTH)
576 al=SSL_AD_ILLEGAL_PARAMETER;
577 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
581 if (j != 0 && j == s->session->session_id_length
582 && memcmp(p,s->session->session_id,j) == 0)
584 if(s->sid_ctx_length != s->session->sid_ctx_length
585 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
587 al=SSL_AD_ILLEGAL_PARAMETER;
588 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
593 else /* a miss or crap from the other end */
595 /* If we were trying for session-id reuse, make a new
596 * SSL_SESSION so we don't stuff up other people */
598 if (s->session->session_id_length > 0)
600 if (!ssl_get_new_session(s,0))
602 al=SSL_AD_INTERNAL_ERROR;
606 s->session->session_id_length=j;
607 memcpy(s->session->session_id,p,j); /* j could be 0 */
610 c=ssl_get_cipher_by_char(s,p);
614 al=SSL_AD_ILLEGAL_PARAMETER;
615 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
618 p+=ssl_put_cipher_by_char(s,NULL,NULL);
620 sk=ssl_get_ciphers_by_id(s);
621 i=sk_SSL_CIPHER_find(sk,c);
624 /* we did not say we would use this cipher */
625 al=SSL_AD_ILLEGAL_PARAMETER;
626 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
630 if (s->hit && (s->session->cipher != c))
633 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
635 al=SSL_AD_ILLEGAL_PARAMETER;
636 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
640 s->s3->tmp.new_cipher=c;
642 /* lets get the compression algorithm */
648 comp=ssl3_comp_find(s->ctx->comp_methods,j);
650 if ((j != 0) && (comp == NULL))
652 al=SSL_AD_ILLEGAL_PARAMETER;
653 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
658 s->s3->tmp.new_compression=comp;
663 /* wrong packet length */
664 al=SSL_AD_DECODE_ERROR;
665 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
671 ssl3_send_alert(s,SSL3_AL_FATAL,al);
676 static int ssl3_get_server_certificate(SSL *s)
679 unsigned long n,nc,llen,l;
681 unsigned char *p,*d,*q;
682 STACK_OF(X509) *sk=NULL;
686 n=ssl3_get_message(s,
690 #if defined(MSDOS) && !defined(WIN32)
691 1024*30, /* 30k max cert list :-) */
693 1024*100, /* 100k max cert list :-) */
697 if (!ok) return((int)n);
699 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
701 s->s3->tmp.reuse_message=1;
705 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
707 al=SSL_AD_UNEXPECTED_MESSAGE;
708 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
711 d=p=(unsigned char *)s->init_buf->data;
713 if ((sk=sk_X509_new_null()) == NULL)
715 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
722 al=SSL_AD_DECODE_ERROR;
723 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
726 for (nc=0; nc<llen; )
731 al=SSL_AD_DECODE_ERROR;
732 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
737 x=d2i_X509(NULL,&q,l);
740 al=SSL_AD_BAD_CERTIFICATE;
741 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
746 al=SSL_AD_DECODE_ERROR;
747 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
750 if (!sk_X509_push(sk,x))
752 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
760 i=ssl_verify_cert_chain(s,sk);
761 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
763 al=ssl_verify_alarm_type(s->verify_result);
764 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
767 ERR_clear_error(); /* but we keep s->verify_result */
769 sc=ssl_sess_cert_new();
770 if (sc == NULL) goto err;
772 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
773 s->session->sess_cert=sc;
776 /* Inconsistency alert: cert_chain does include the peer's
777 * certificate, which we don't include in s3_srvr.c */
778 x=sk_X509_value(sk,0);
781 pkey=X509_get_pubkey(x);
783 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
787 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
791 i=ssl_cert_type(x,pkey);
796 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
800 sc->peer_cert_type=i;
801 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
802 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
803 * We just created sc a couple of
805 X509_free(sc->peer_pkeys[i].x509);
806 sc->peer_pkeys[i].x509=x;
807 sc->peer_key= &(sc->peer_pkeys[i]);
809 if (s->session->peer != NULL)
810 X509_free(s->session->peer);
811 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
820 ssl3_send_alert(s,SSL3_AL_FATAL,al);
825 sk_X509_pop_free(sk,X509_free);
829 static int ssl3_get_key_exchange(SSL *s)
832 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
835 unsigned char *param,*p;
836 int al,i,j,param_len,ok;
846 n=ssl3_get_message(s,
847 SSL3_ST_CR_KEY_EXCH_A,
848 SSL3_ST_CR_KEY_EXCH_B,
853 if (!ok) return((int)n);
855 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
857 s->s3->tmp.reuse_message=1;
861 param=p=(unsigned char *)s->init_buf->data;
863 if (s->session->sess_cert != NULL)
866 if (s->session->sess_cert->peer_rsa_tmp != NULL)
868 RSA_free(s->session->sess_cert->peer_rsa_tmp);
869 s->session->sess_cert->peer_rsa_tmp=NULL;
873 if (s->session->sess_cert->peer_dh_tmp)
875 DH_free(s->session->sess_cert->peer_dh_tmp);
876 s->session->sess_cert->peer_dh_tmp=NULL;
882 s->session->sess_cert=ssl_sess_cert_new();
886 alg=s->s3->tmp.new_cipher->algorithms;
891 if ((rsa=RSA_new()) == NULL)
893 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
900 al=SSL_AD_DECODE_ERROR;
901 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
904 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
906 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
915 al=SSL_AD_DECODE_ERROR;
916 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
919 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
921 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
927 /* this should be because we are using an export cipher */
929 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
932 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
935 s->session->sess_cert->peer_rsa_tmp=rsa;
943 else if (alg & SSL_kEDH)
945 if ((dh=DH_new()) == NULL)
947 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
954 al=SSL_AD_DECODE_ERROR;
955 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
958 if (!(dh->p=BN_bin2bn(p,i,NULL)))
960 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
969 al=SSL_AD_DECODE_ERROR;
970 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
973 if (!(dh->g=BN_bin2bn(p,i,NULL)))
975 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
984 al=SSL_AD_DECODE_ERROR;
985 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
988 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
990 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
998 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1004 else if (alg & SSL_aDSS)
1005 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1007 /* else anonymous DH, so no certificate or pkey. */
1009 s->session->sess_cert->peer_dh_tmp=dh;
1012 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1014 al=SSL_AD_ILLEGAL_PARAMETER;
1015 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1021 al=SSL_AD_HANDSHAKE_FAILURE;
1022 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1027 /* p points to the next byte, there are 'n' bytes left */
1030 /* if it was signed, check the signature */
1035 j=EVP_PKEY_size(pkey);
1037 if ((i != n) || (n > j) || (n <= 0))
1039 /* wrong packet length */
1040 al=SSL_AD_DECODE_ERROR;
1041 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1046 if (pkey->type == EVP_PKEY_RSA)
1052 for (num=2; num > 0; num--)
1054 EVP_DigestInit(&md_ctx,(num == 2)
1055 ?s->ctx->md5:s->ctx->sha1);
1056 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1057 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1058 EVP_DigestUpdate(&md_ctx,param,param_len);
1059 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1063 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1067 al=SSL_AD_DECRYPT_ERROR;
1068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1074 al=SSL_AD_DECRYPT_ERROR;
1075 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1082 if (pkey->type == EVP_PKEY_DSA)
1085 EVP_VerifyInit(&md_ctx,EVP_dss1());
1086 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1087 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1088 EVP_VerifyUpdate(&md_ctx,param,param_len);
1089 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1092 al=SSL_AD_DECRYPT_ERROR;
1093 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1100 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1106 /* still data left over */
1107 if (!(alg & SSL_aNULL))
1109 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1114 al=SSL_AD_DECODE_ERROR;
1115 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1119 EVP_PKEY_free(pkey);
1122 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1124 EVP_PKEY_free(pkey);
1136 static int ssl3_get_certificate_request(SSL *s)
1139 unsigned long n,nc,l;
1140 unsigned int llen,ctype_num,i;
1142 unsigned char *p,*d,*q;
1143 STACK_OF(X509_NAME) *ca_sk=NULL;
1145 n=ssl3_get_message(s,
1146 SSL3_ST_CR_CERT_REQ_A,
1147 SSL3_ST_CR_CERT_REQ_B,
1149 #if defined(MSDOS) && !defined(WIN32)
1150 1024*30, /* 30k max cert list :-) */
1152 1024*100, /* 100k max cert list :-) */
1156 if (!ok) return((int)n);
1158 s->s3->tmp.cert_req=0;
1160 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1162 s->s3->tmp.reuse_message=1;
1166 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1168 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1169 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1173 /* TLS does not like anon-DH with client cert */
1174 if (s->version > SSL3_VERSION)
1176 l=s->s3->tmp.new_cipher->algorithms;
1179 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1180 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1185 d=p=(unsigned char *)s->init_buf->data;
1187 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1189 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1193 /* get the certificate types */
1195 if (ctype_num > SSL3_CT_NUMBER)
1196 ctype_num=SSL3_CT_NUMBER;
1197 for (i=0; i<ctype_num; i++)
1198 s->s3->tmp.ctype[i]= p[i];
1201 /* get the CA RDNs */
1206 out=fopen("/tmp/vsign.der","w");
1207 fwrite(p,1,llen,out);
1212 if ((llen+ctype_num+2+1) != n)
1214 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1215 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1219 for (nc=0; nc<llen; )
1222 if ((l+nc+2) > llen)
1224 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1225 goto cont; /* netscape bugs */
1226 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1227 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1233 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1235 /* If netscape tolerance is on, ignore errors */
1236 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1240 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1241 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1248 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1249 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1252 if (!sk_X509_NAME_push(ca_sk,xn))
1254 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1268 /* we should setup a certificate to return.... */
1269 s->s3->tmp.cert_req=1;
1270 s->s3->tmp.ctype_num=ctype_num;
1271 if (s->s3->tmp.ca_names != NULL)
1272 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1273 s->s3->tmp.ca_names=ca_sk;
1278 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1282 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1284 return(X509_NAME_cmp(*a,*b));
1287 static int ssl3_get_server_done(SSL *s)
1292 n=ssl3_get_message(s,
1293 SSL3_ST_CR_SRVR_DONE_A,
1294 SSL3_ST_CR_SRVR_DONE_B,
1295 SSL3_MT_SERVER_DONE,
1296 30, /* should be very small, like 0 :-) */
1299 if (!ok) return((int)n);
1302 /* should contain no data */
1303 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1304 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1310 static int ssl3_send_client_key_exchange(SSL *s)
1312 unsigned char *p,*d;
1317 EVP_PKEY *pkey=NULL;
1320 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1322 d=(unsigned char *)s->init_buf->data;
1325 l=s->s3->tmp.new_cipher->algorithms;
1331 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1333 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1334 rsa=s->session->sess_cert->peer_rsa_tmp;
1337 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1338 if ((pkey == NULL) ||
1339 (pkey->type != EVP_PKEY_RSA) ||
1340 (pkey->pkey.rsa == NULL))
1342 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1346 EVP_PKEY_free(pkey);
1349 tmp_buf[0]=s->client_version>>8;
1350 tmp_buf[1]=s->client_version&0xff;
1351 if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1354 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1357 /* Fix buf for TLS and beyond */
1358 if (s->version > SSL3_VERSION)
1360 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1361 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1363 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1364 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1368 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1372 /* Fix buf for TLS and beyond */
1373 if (s->version > SSL3_VERSION)
1379 s->session->master_key_length=
1380 s->method->ssl3_enc->generate_master_secret(s,
1381 s->session->master_key,
1382 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1383 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1388 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1390 DH *dh_srvr,*dh_clnt;
1392 if (s->session->sess_cert->peer_dh_tmp != NULL)
1393 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1396 /* we get them from the cert */
1397 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1398 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1402 /* generate a new random key */
1403 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1405 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1408 if (!DH_generate_key(dh_clnt))
1410 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1414 /* use the 'p' output buffer for the DH key, but
1415 * make sure to clear it out afterwards */
1417 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1425 /* generate master key from the result */
1426 s->session->master_key_length=
1427 s->method->ssl3_enc->generate_master_secret(s,
1428 s->session->master_key,p,n);
1432 /* send off the data */
1433 n=BN_num_bytes(dh_clnt->pub_key);
1435 BN_bn2bin(dh_clnt->pub_key,p);
1440 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1445 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1446 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1450 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1453 s->state=SSL3_ST_CW_KEY_EXCH_B;
1454 /* number of bytes to write */
1459 /* SSL3_ST_CW_KEY_EXCH_B */
1460 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1465 static int ssl3_send_client_verify(SSL *s)
1467 unsigned char *p,*d;
1468 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1478 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1480 d=(unsigned char *)s->init_buf->data;
1482 pkey=s->cert->key->privatekey;
1484 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1485 &(data[MD5_DIGEST_LENGTH]));
1488 if (pkey->type == EVP_PKEY_RSA)
1490 s->method->ssl3_enc->cert_verify_mac(s,
1491 &(s->s3->finish_dgst1),&(data[0]));
1492 if (RSA_sign(NID_md5_sha1, data,
1493 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1494 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1496 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1505 if (pkey->type == EVP_PKEY_DSA)
1507 if (!DSA_sign(pkey->save_type,
1508 &(data[MD5_DIGEST_LENGTH]),
1509 SHA_DIGEST_LENGTH,&(p[2]),
1510 (unsigned int *)&j,pkey->pkey.dsa))
1512 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1521 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1524 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1527 s->init_num=(int)n+4;
1530 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1535 static int ssl3_send_client_certificate(SSL *s)
1538 EVP_PKEY *pkey=NULL;
1542 if (s->state == SSL3_ST_CW_CERT_A)
1544 if ((s->cert == NULL) ||
1545 (s->cert->key->x509 == NULL) ||
1546 (s->cert->key->privatekey == NULL))
1547 s->state=SSL3_ST_CW_CERT_B;
1549 s->state=SSL3_ST_CW_CERT_C;
1552 /* We need to get a client cert */
1553 if (s->state == SSL3_ST_CW_CERT_B)
1555 /* If we get an error, we need to
1556 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1557 * We then get retied later */
1559 if (s->ctx->client_cert_cb != NULL)
1560 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1563 s->rwstate=SSL_X509_LOOKUP;
1566 s->rwstate=SSL_NOTHING;
1567 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1569 s->state=SSL3_ST_CW_CERT_B;
1570 if ( !SSL_use_certificate(s,x509) ||
1571 !SSL_use_PrivateKey(s,pkey))
1577 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1580 if (x509 != NULL) X509_free(x509);
1581 if (pkey != NULL) EVP_PKEY_free(pkey);
1584 if (s->version == SSL3_VERSION)
1586 s->s3->tmp.cert_req=0;
1587 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1592 s->s3->tmp.cert_req=2;
1596 /* Ok, we have a cert */
1597 s->state=SSL3_ST_CW_CERT_C;
1600 if (s->state == SSL3_ST_CW_CERT_C)
1602 s->state=SSL3_ST_CW_CERT_D;
1603 l=ssl3_output_cert_chain(s,
1604 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1608 /* SSL3_ST_CW_CERT_D */
1609 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1612 #define has_bits(i,m) (((i)&(m)) == (m))
1614 static int ssl3_check_cert_and_algorithm(SSL *s)
1618 EVP_PKEY *pkey=NULL;
1627 sc=s->session->sess_cert;
1631 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1635 algs=s->s3->tmp.new_cipher->algorithms;
1637 /* we don't have a certificate */
1638 if (algs & (SSL_aDH|SSL_aNULL))
1642 rsa=s->session->sess_cert->peer_rsa_tmp;
1645 dh=s->session->sess_cert->peer_dh_tmp;
1648 /* This is the passed certificate */
1650 idx=sc->peer_cert_type;
1651 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1652 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1653 EVP_PKEY_free(pkey);
1656 /* Check that we have a certificate if we require one */
1657 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1659 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1663 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1665 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1670 if ((algs & SSL_kRSA) &&
1671 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1673 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1678 if ((algs & SSL_kEDH) &&
1679 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1681 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1684 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1686 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1690 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1692 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1698 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1701 if (algs & SSL_kRSA)
1704 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1706 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1713 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1716 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1718 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1725 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1731 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);