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(X509_NAME **a,X509_NAME **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_seed(&Time,sizeof(Time));
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,
329 s->method->ssl3_enc->client_finished_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_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);
768 sc=ssl_sess_cert_new();
769 if (sc == NULL) goto err;
771 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
772 s->session->sess_cert=sc;
775 x=sk_X509_value(sk,0);
778 pkey=X509_get_pubkey(x);
780 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
784 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
788 i=ssl_cert_type(x,pkey);
793 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
797 sc->peer_cert_type=i;
798 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
799 if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
800 * We just created sc a couple of
802 X509_free(sc->peer_pkeys[i].x509);
803 sc->peer_pkeys[i].x509=x;
804 sc->peer_key= &(sc->peer_pkeys[i]);
806 if (s->session->peer != NULL)
807 X509_free(s->session->peer);
808 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
817 ssl3_send_alert(s,SSL3_AL_FATAL,al);
822 sk_X509_pop_free(sk,X509_free);
826 static int ssl3_get_key_exchange(SSL *s)
829 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
832 unsigned char *param,*p;
833 int al,i,j,param_len,ok;
843 n=ssl3_get_message(s,
844 SSL3_ST_CR_KEY_EXCH_A,
845 SSL3_ST_CR_KEY_EXCH_B,
850 if (!ok) return((int)n);
852 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
854 s->s3->tmp.reuse_message=1;
858 param=p=(unsigned char *)s->init_buf->data;
860 if (s->session->sess_cert != NULL)
863 if (s->session->sess_cert->peer_rsa_tmp != NULL)
865 RSA_free(s->session->sess_cert->peer_rsa_tmp);
866 s->session->sess_cert->peer_rsa_tmp=NULL;
870 if (s->session->sess_cert->peer_dh_tmp)
872 DH_free(s->session->sess_cert->peer_dh_tmp);
873 s->session->sess_cert->peer_dh_tmp=NULL;
879 s->session->sess_cert=ssl_sess_cert_new();
883 alg=s->s3->tmp.new_cipher->algorithms;
888 if ((rsa=RSA_new()) == NULL)
890 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
897 al=SSL_AD_DECODE_ERROR;
898 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
901 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
912 al=SSL_AD_DECODE_ERROR;
913 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
916 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
918 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
924 /* this should be because we are using an export cipher */
926 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
929 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
932 s->session->sess_cert->peer_rsa_tmp=rsa;
940 if ((dh=DH_new()) == NULL)
942 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
949 al=SSL_AD_DECODE_ERROR;
950 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
953 if (!(dh->p=BN_bin2bn(p,i,NULL)))
955 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
964 al=SSL_AD_DECODE_ERROR;
965 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
968 if (!(dh->g=BN_bin2bn(p,i,NULL)))
970 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
979 al=SSL_AD_DECODE_ERROR;
980 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
983 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
985 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
993 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
998 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1000 /* else anonymous DH, so no certificate or pkey. */
1002 s->session->sess_cert->peer_dh_tmp=dh;
1005 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1007 al=SSL_AD_ILLEGAL_PARAMETER;
1008 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1014 al=SSL_AD_HANDSHAKE_FAILURE;
1015 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1020 /* p points to the next byte, there are 'n' bytes left */
1023 /* if it was signed, check the signature */
1028 j=EVP_PKEY_size(pkey);
1030 if ((i != n) || (n > j) || (n <= 0))
1032 /* wrong packet length */
1033 al=SSL_AD_DECODE_ERROR;
1034 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1039 if (pkey->type == EVP_PKEY_RSA)
1045 for (num=2; num > 0; num--)
1047 EVP_DigestInit(&md_ctx,(num == 2)
1048 ?s->ctx->md5:s->ctx->sha1);
1049 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1050 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1051 EVP_DigestUpdate(&md_ctx,param,param_len);
1052 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1056 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1060 al=SSL_AD_DECRYPT_ERROR;
1061 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1067 al=SSL_AD_DECRYPT_ERROR;
1068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1075 if (pkey->type == EVP_PKEY_DSA)
1078 EVP_VerifyInit(&md_ctx,EVP_dss1());
1079 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1080 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1081 EVP_VerifyUpdate(&md_ctx,param,param_len);
1082 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1085 al=SSL_AD_DECRYPT_ERROR;
1086 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1093 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1099 /* still data left over */
1100 if (!(alg & SSL_aNULL))
1102 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1107 al=SSL_AD_DECODE_ERROR;
1108 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1112 EVP_PKEY_free(pkey);
1115 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1117 EVP_PKEY_free(pkey);
1129 static int ssl3_get_certificate_request(SSL *s)
1132 unsigned long n,nc,l;
1133 unsigned int llen,ctype_num,i;
1135 unsigned char *p,*d,*q;
1136 STACK_OF(X509_NAME) *ca_sk=NULL;
1138 n=ssl3_get_message(s,
1139 SSL3_ST_CR_CERT_REQ_A,
1140 SSL3_ST_CR_CERT_REQ_B,
1142 #if defined(MSDOS) && !defined(WIN32)
1143 1024*30, /* 30k max cert list :-) */
1145 1024*100, /* 100k max cert list :-) */
1149 if (!ok) return((int)n);
1151 s->s3->tmp.cert_req=0;
1153 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1155 s->s3->tmp.reuse_message=1;
1159 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1161 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1162 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1166 /* TLS does not like anon-DH with client cert */
1167 if (s->version > SSL3_VERSION)
1169 l=s->s3->tmp.new_cipher->algorithms;
1172 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1173 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1178 d=p=(unsigned char *)s->init_buf->data;
1180 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1182 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1186 /* get the certificate types */
1188 if (ctype_num > SSL3_CT_NUMBER)
1189 ctype_num=SSL3_CT_NUMBER;
1190 for (i=0; i<ctype_num; i++)
1191 s->s3->tmp.ctype[i]= p[i];
1194 /* get the CA RDNs */
1199 out=fopen("/tmp/vsign.der","w");
1200 fwrite(p,1,llen,out);
1205 if ((llen+ctype_num+2+1) != n)
1207 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1208 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1212 for (nc=0; nc<llen; )
1215 if ((l+nc+2) > llen)
1217 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1218 goto cont; /* netscape bugs */
1219 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1220 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1226 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1228 /* If netscape tollerance is on, ignore errors */
1229 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1233 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1234 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1241 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1242 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1245 if (!sk_X509_NAME_push(ca_sk,xn))
1247 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1261 /* we should setup a certficate to return.... */
1262 s->s3->tmp.cert_req=1;
1263 s->s3->tmp.ctype_num=ctype_num;
1264 if (s->s3->tmp.ca_names != NULL)
1265 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1266 s->s3->tmp.ca_names=ca_sk;
1271 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1275 static int ca_dn_cmp(X509_NAME **a, X509_NAME **b)
1277 return(X509_NAME_cmp(*a,*b));
1280 static int ssl3_get_server_done(SSL *s)
1285 n=ssl3_get_message(s,
1286 SSL3_ST_CR_SRVR_DONE_A,
1287 SSL3_ST_CR_SRVR_DONE_B,
1288 SSL3_MT_SERVER_DONE,
1289 30, /* should be very small, like 0 :-) */
1292 if (!ok) return((int)n);
1295 /* should contain no data */
1296 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1297 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1303 static int ssl3_send_client_key_exchange(SSL *s)
1305 unsigned char *p,*d;
1310 EVP_PKEY *pkey=NULL;
1313 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1315 d=(unsigned char *)s->init_buf->data;
1318 l=s->s3->tmp.new_cipher->algorithms;
1324 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1326 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1327 rsa=s->session->sess_cert->peer_rsa_tmp;
1330 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1331 if ((pkey == NULL) ||
1332 (pkey->type != EVP_PKEY_RSA) ||
1333 (pkey->pkey.rsa == NULL))
1335 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1339 EVP_PKEY_free(pkey);
1342 tmp_buf[0]=s->client_version>>8;
1343 tmp_buf[1]=s->client_version&0xff;
1344 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1346 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1349 /* Fix buf for TLS and beyond */
1350 if (s->version > SSL3_VERSION)
1352 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1353 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1355 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1356 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1360 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1364 /* Fix buf for TLS and beyond */
1365 if (s->version > SSL3_VERSION)
1371 s->session->master_key_length=
1372 s->method->ssl3_enc->generate_master_secret(s,
1373 s->session->master_key,
1374 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1375 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1380 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1382 DH *dh_srvr,*dh_clnt;
1384 if (s->session->sess_cert->peer_dh_tmp != NULL)
1385 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1388 /* we get them from the cert */
1389 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1390 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1394 /* generate a new random key */
1395 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1397 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1400 if (!DH_generate_key(dh_clnt))
1402 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1406 /* use the 'p' output buffer for the DH key, but
1407 * make sure to clear it out afterwards */
1409 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1413 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1417 /* generate master key from the result */
1418 s->session->master_key_length=
1419 s->method->ssl3_enc->generate_master_secret(s,
1420 s->session->master_key,p,n);
1424 /* send off the data */
1425 n=BN_num_bytes(dh_clnt->pub_key);
1427 BN_bn2bin(dh_clnt->pub_key,p);
1432 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1437 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1438 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1442 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1445 s->state=SSL3_ST_CW_KEY_EXCH_B;
1446 /* number of bytes to write */
1451 /* SSL3_ST_CW_KEY_EXCH_B */
1452 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1457 static int ssl3_send_client_verify(SSL *s)
1459 unsigned char *p,*d;
1460 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1470 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1472 d=(unsigned char *)s->init_buf->data;
1474 pkey=s->cert->key->privatekey;
1476 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1477 &(data[MD5_DIGEST_LENGTH]));
1480 if (pkey->type == EVP_PKEY_RSA)
1482 s->method->ssl3_enc->cert_verify_mac(s,
1483 &(s->s3->finish_dgst1),&(data[0]));
1484 if (RSA_sign(NID_md5_sha1, data,
1485 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1486 &(p[2]), &i, pkey->pkey.rsa) <= 0 )
1488 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1497 if (pkey->type == EVP_PKEY_DSA)
1499 if (!DSA_sign(pkey->save_type,
1500 &(data[MD5_DIGEST_LENGTH]),
1501 SHA_DIGEST_LENGTH,&(p[2]),
1502 (unsigned int *)&j,pkey->pkey.dsa))
1504 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1513 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1516 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1519 s->init_num=(int)n+4;
1522 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1527 static int ssl3_send_client_certificate(SSL *s)
1530 EVP_PKEY *pkey=NULL;
1534 if (s->state == SSL3_ST_CW_CERT_A)
1536 if ((s->cert == NULL) ||
1537 (s->cert->key->x509 == NULL) ||
1538 (s->cert->key->privatekey == NULL))
1539 s->state=SSL3_ST_CW_CERT_B;
1541 s->state=SSL3_ST_CW_CERT_C;
1544 /* We need to get a client cert */
1545 if (s->state == SSL3_ST_CW_CERT_B)
1547 /* If we get an error, we need to
1548 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1549 * We then get retied later */
1551 if (s->ctx->client_cert_cb != NULL)
1552 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1555 s->rwstate=SSL_X509_LOOKUP;
1558 s->rwstate=SSL_NOTHING;
1559 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1561 s->state=SSL3_ST_CW_CERT_B;
1562 if ( !SSL_use_certificate(s,x509) ||
1563 !SSL_use_PrivateKey(s,pkey))
1569 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1572 if (x509 != NULL) X509_free(x509);
1573 if (pkey != NULL) EVP_PKEY_free(pkey);
1576 if (s->version == SSL3_VERSION)
1578 s->s3->tmp.cert_req=0;
1579 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1584 s->s3->tmp.cert_req=2;
1588 /* Ok, we have a cert */
1589 s->state=SSL3_ST_CW_CERT_C;
1592 if (s->state == SSL3_ST_CW_CERT_C)
1594 s->state=SSL3_ST_CW_CERT_D;
1595 l=ssl3_output_cert_chain(s,
1596 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1600 /* SSL3_ST_CW_CERT_D */
1601 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1604 #define has_bits(i,m) (((i)&(m)) == (m))
1606 static int ssl3_check_cert_and_algorithm(SSL *s)
1610 EVP_PKEY *pkey=NULL;
1619 sc=s->session->sess_cert;
1623 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1627 algs=s->s3->tmp.new_cipher->algorithms;
1629 /* we don't have a certificate */
1630 if (algs & (SSL_aDH|SSL_aNULL))
1634 rsa=s->session->sess_cert->peer_rsa_tmp;
1637 dh=s->session->sess_cert->peer_dh_tmp;
1640 /* This is the passed certificate */
1642 idx=sc->peer_cert_type;
1643 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1644 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1645 EVP_PKEY_free(pkey);
1648 /* Check that we have a certificate if we require one */
1649 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1651 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1655 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1657 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1662 if ((algs & SSL_kRSA) &&
1663 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1665 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1670 if ((algs & SSL_kEDH) &&
1671 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1673 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1676 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1678 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1682 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1684 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1690 if (SSL_IS_EXPORT(algs) && !has_bits(i,EVP_PKT_EXP))
1693 if (algs & SSL_kRSA)
1696 || RSA_size(rsa) > SSL_EXPORT_PKEYLENGTH(algs))
1698 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1705 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1708 || DH_size(dh) > SSL_EXPORT_PKEYLENGTH(algs))
1710 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1717 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1723 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);