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.]
59 #define REUSE_CIPHER_BUG
62 #include <openssl/buffer.h>
63 #include <openssl/rand.h>
64 #include <openssl/objects.h>
65 #include <openssl/md5.h>
66 #include <openssl/sha.h>
67 #include <openssl/evp.h>
68 #include <openssl/x509.h>
71 static SSL_METHOD *ssl3_get_server_method(int ver);
72 static int ssl3_get_client_hello(SSL *s);
73 static int ssl3_send_server_hello(SSL *s);
74 static int ssl3_send_server_key_exchange(SSL *s);
75 static int ssl3_send_certificate_request(SSL *s);
76 static int ssl3_send_server_done(SSL *s);
77 static int ssl3_get_cert_verify(SSL *s);
78 static int ssl3_get_client_key_exchange(SSL *s);
79 static int ssl3_get_client_certificate(SSL *s);
80 static int ssl3_send_hello_request(SSL *s);
82 static SSL_METHOD *ssl3_get_server_method(int ver)
84 if (ver == SSL3_VERSION)
85 return(SSLv3_server_method());
90 SSL_METHOD *SSLv3_server_method(void)
93 static SSL_METHOD SSLv3_server_data;
97 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
99 SSLv3_server_data.ssl_accept=ssl3_accept;
100 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
103 return(&SSLv3_server_data);
106 int ssl3_accept(SSL *s)
109 unsigned long l,Time=time(NULL);
113 int new_state,state,skip=0;
115 RAND_seed(&Time,sizeof(Time));
119 if (s->info_callback != NULL)
121 else if (s->ctx->info_callback != NULL)
122 cb=s->ctx->info_callback;
124 /* init things to blank */
125 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
130 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
140 case SSL_ST_RENEGOTIATE:
142 /* s->state=SSL_ST_ACCEPT; */
146 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
147 case SSL_ST_OK|SSL_ST_ACCEPT:
150 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
152 if ((s->version>>8) != 3)
154 /* s->version=SSL3_VERSION; */
155 s->type=SSL_ST_ACCEPT;
157 if (s->init_buf == NULL)
159 if ((buf=BUF_MEM_new()) == NULL)
164 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
172 if (!ssl3_setup_buffers(s))
178 /* Ok, we now need to push on a buffering BIO so that
179 * the output is sent in a way that TCP likes :-)
181 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
185 if (s->state != SSL_ST_RENEGOTIATE)
187 s->state=SSL3_ST_SR_CLNT_HELLO_A;
188 ssl3_init_finished_mac(s);
189 s->ctx->stats.sess_accept++;
193 s->ctx->stats.sess_accept_renegotiate++;
194 s->state=SSL3_ST_SW_HELLO_REQ_A;
198 case SSL3_ST_SW_HELLO_REQ_A:
199 case SSL3_ST_SW_HELLO_REQ_B:
202 ret=ssl3_send_hello_request(s);
203 if (ret <= 0) goto end;
204 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
205 s->state=SSL3_ST_SW_FLUSH;
208 ssl3_init_finished_mac(s);
211 case SSL3_ST_SW_HELLO_REQ_C:
217 case SSL3_ST_SR_CLNT_HELLO_A:
218 case SSL3_ST_SR_CLNT_HELLO_B:
219 case SSL3_ST_SR_CLNT_HELLO_C:
222 ret=ssl3_get_client_hello(s);
223 if (ret <= 0) goto end;
224 s->state=SSL3_ST_SW_SRVR_HELLO_A;
228 case SSL3_ST_SW_SRVR_HELLO_A:
229 case SSL3_ST_SW_SRVR_HELLO_B:
230 ret=ssl3_send_server_hello(s);
231 if (ret <= 0) goto end;
234 s->state=SSL3_ST_SW_CHANGE_A;
236 s->state=SSL3_ST_SW_CERT_A;
240 case SSL3_ST_SW_CERT_A:
241 case SSL3_ST_SW_CERT_B:
242 /* Check if it is anon DH */
243 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
245 ret=ssl3_send_server_certificate(s);
246 if (ret <= 0) goto end;
250 s->state=SSL3_ST_SW_KEY_EXCH_A;
254 case SSL3_ST_SW_KEY_EXCH_A:
255 case SSL3_ST_SW_KEY_EXCH_B:
256 l=s->s3->tmp.new_cipher->algorithms;
258 /* clear this, it may get reset by
259 * send_server_key_exchange */
260 if (s->options & SSL_OP_EPHEMERAL_RSA)
261 s->s3->tmp.use_rsa_tmp=1;
263 s->s3->tmp.use_rsa_tmp=0;
265 /* only send if a DH key exchange, fortezza or
266 * RSA but we have a sign only certificate */
267 if (s->s3->tmp.use_rsa_tmp
268 || (l & (SSL_DH|SSL_kFZA))
270 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
272 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
278 ret=ssl3_send_server_key_exchange(s);
279 if (ret <= 0) goto end;
284 s->state=SSL3_ST_SW_CERT_REQ_A;
288 case SSL3_ST_SW_CERT_REQ_A:
289 case SSL3_ST_SW_CERT_REQ_B:
290 if (/* don't request cert unless asked for it: */
291 !(s->verify_mode & SSL_VERIFY_PEER) ||
292 /* if SSL_VERIFY_CLIENT_ONCE is set,
293 * don't request cert during re-negotiation: */
294 ((s->session->peer != NULL) &&
295 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
296 /* never request cert in anonymous ciphersuites
297 * (see section "Certificate request" in SSL 3 drafts
298 * and in RFC 2246): */
299 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
300 /* ... except when the application insists on verification
301 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
302 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)))
304 /* no cert request */
306 s->s3->tmp.cert_request=0;
307 s->state=SSL3_ST_SW_SRVR_DONE_A;
311 s->s3->tmp.cert_request=1;
312 ret=ssl3_send_certificate_request(s);
313 if (ret <= 0) goto end;
314 s->state=SSL3_ST_SW_SRVR_DONE_A;
319 case SSL3_ST_SW_SRVR_DONE_A:
320 case SSL3_ST_SW_SRVR_DONE_B:
321 ret=ssl3_send_server_done(s);
322 if (ret <= 0) goto end;
323 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
324 s->state=SSL3_ST_SW_FLUSH;
328 case SSL3_ST_SW_FLUSH:
329 /* number of bytes to be flushed */
330 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
333 s->rwstate=SSL_WRITING;
334 num1=BIO_flush(s->wbio);
335 if (num1 <= 0) { ret= -1; goto end; }
336 s->rwstate=SSL_NOTHING;
339 s->state=s->s3->tmp.next_state;
342 case SSL3_ST_SR_CERT_A:
343 case SSL3_ST_SR_CERT_B:
344 /* could be sent for a DH cert, even if we
345 * have not asked for it :-) */
346 ret=ssl3_get_client_certificate(s);
347 if (ret <= 0) goto end;
349 s->state=SSL3_ST_SR_KEY_EXCH_A;
352 case SSL3_ST_SR_KEY_EXCH_A:
353 case SSL3_ST_SR_KEY_EXCH_B:
354 ret=ssl3_get_client_key_exchange(s);
355 if (ret <= 0) goto end;
356 s->state=SSL3_ST_SR_CERT_VRFY_A;
359 /* We need to get hashes here so if there is
360 * a client cert, it can be verified */
361 s->method->ssl3_enc->cert_verify_mac(s,
362 &(s->s3->finish_dgst1),
363 &(s->s3->tmp.finish_md[0]));
364 s->method->ssl3_enc->cert_verify_mac(s,
365 &(s->s3->finish_dgst2),
366 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
370 case SSL3_ST_SR_CERT_VRFY_A:
371 case SSL3_ST_SR_CERT_VRFY_B:
373 /* we should decide if we expected this one */
374 ret=ssl3_get_cert_verify(s);
375 if (ret <= 0) goto end;
377 s->state=SSL3_ST_SR_FINISHED_A;
381 case SSL3_ST_SR_FINISHED_A:
382 case SSL3_ST_SR_FINISHED_B:
383 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
384 SSL3_ST_SR_FINISHED_B);
385 if (ret <= 0) goto end;
389 s->state=SSL3_ST_SW_CHANGE_A;
393 case SSL3_ST_SW_CHANGE_A:
394 case SSL3_ST_SW_CHANGE_B:
396 s->session->cipher=s->s3->tmp.new_cipher;
397 if (!s->method->ssl3_enc->setup_key_block(s))
398 { ret= -1; goto end; }
400 ret=ssl3_send_change_cipher_spec(s,
401 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
403 if (ret <= 0) goto end;
404 s->state=SSL3_ST_SW_FINISHED_A;
407 if (!s->method->ssl3_enc->change_cipher_state(s,
408 SSL3_CHANGE_CIPHER_SERVER_WRITE))
416 case SSL3_ST_SW_FINISHED_A:
417 case SSL3_ST_SW_FINISHED_B:
418 ret=ssl3_send_finished(s,
419 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
420 s->method->ssl3_enc->server_finished,
421 s->method->ssl3_enc->server_finished_len);
422 if (ret <= 0) goto end;
423 s->state=SSL3_ST_SW_FLUSH;
425 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
427 s->s3->tmp.next_state=SSL_ST_OK;
432 /* clean a few things up */
433 ssl3_cleanup_key_block(s);
435 BUF_MEM_free(s->init_buf);
438 /* remove buffering on output */
439 ssl_free_wbio_buffer(s);
444 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
446 s->ctx->stats.sess_accept_good++;
448 s->handshake_func=ssl3_accept;
451 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
457 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
463 if (!s->s3->tmp.reuse_message && !skip)
467 if ((ret=BIO_flush(s->wbio)) <= 0)
472 if ((cb != NULL) && (s->state != state))
476 cb(s,SSL_CB_ACCEPT_LOOP,1);
483 /* BIO_flush(s->wbio); */
486 cb(s,SSL_CB_ACCEPT_EXIT,ret);
491 static int ssl3_send_hello_request(SSL *s)
495 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
497 p=(unsigned char *)s->init_buf->data;
498 *(p++)=SSL3_MT_CLIENT_REQUEST;
503 s->state=SSL3_ST_SW_HELLO_REQ_B;
504 /* number of bytes to write */
509 /* SSL3_ST_SW_HELLO_REQ_B */
510 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
513 static int ssl3_get_client_hello(SSL *s)
515 int i,j,ok,al,ret= -1;
518 unsigned char *p,*d,*q;
521 STACK_OF(SSL_CIPHER) *ciphers=NULL;
523 /* We do this so that we will respond with our native type.
524 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
525 * This down switching should be handled by a different method.
526 * If we are SSLv3, we will respond with SSLv3, even if prompted with
529 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
532 s->state=SSL3_ST_SR_CLNT_HELLO_B;
534 n=ssl3_get_message(s,
535 SSL3_ST_SR_CLNT_HELLO_B,
536 SSL3_ST_SR_CLNT_HELLO_C,
537 SSL3_MT_CLIENT_HELLO,
538 SSL3_RT_MAX_PLAIN_LENGTH,
541 if (!ok) return((int)n);
542 d=p=(unsigned char *)s->init_buf->data;
544 /* use version from inside client hello, not from record header
545 * (may differ: see RFC 2246, Appendix E, second paragraph) */
546 s->client_version=(((int)p[0])<<8)|(int)p[1];
549 /* load the client random */
550 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
553 /* get the session-id */
559 if (!ssl_get_new_session(s,1))
564 i=ssl_get_prev_session(s,p,j);
566 { /* previous session */
573 if (!ssl_get_new_session(s,1))
580 if ((i == 0) && (j != 0))
582 /* we need a cipher if we are not resuming a session */
583 al=SSL_AD_ILLEGAL_PARAMETER;
584 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
589 /* not enough data */
590 al=SSL_AD_DECODE_ERROR;
591 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
594 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
601 /* If it is a hit, check that the cipher is in the list */
602 if ((s->hit) && (i > 0))
605 id=s->session->cipher->id;
608 printf("client sent %d ciphers\n",sk_num(ciphers));
610 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
612 c=sk_SSL_CIPHER_value(ciphers,i);
614 printf("client [%2d of %2d]:%s\n",
615 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
625 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
627 /* Very bad for multi-threading.... */
628 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
633 /* we need to have the cipher in the cipher
634 * list if we are asked to reuse it */
635 al=SSL_AD_ILLEGAL_PARAMETER;
636 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
647 if (p[j] == 0) break;
654 al=SSL_AD_DECODE_ERROR;
655 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
659 /* Worst case, we will use the NULL compression, but if we have other
660 * options, we will now look for them. We have i-1 compression
661 * algorithms from the client, starting at q. */
662 s->s3->tmp.new_compression=NULL;
663 if (s->ctx->comp_methods != NULL)
664 { /* See if we have a match */
667 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
670 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
683 s->s3->tmp.new_compression=comp;
688 /* TLS does not mind if there is extra stuff */
689 if (s->version == SSL3_VERSION)
693 /* wrong number of bytes,
694 * there could be more to follow */
695 al=SSL_AD_DECODE_ERROR;
696 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
701 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
706 s->session->compress_meth=(comp == NULL)?0:comp->id;
707 if (s->session->ciphers != NULL)
708 sk_SSL_CIPHER_free(s->session->ciphers);
709 s->session->ciphers=ciphers;
712 al=SSL_AD_ILLEGAL_PARAMETER;
713 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
717 c=ssl3_choose_cipher(s,s->session->ciphers,
718 ssl_get_ciphers_by_id(s));
722 al=SSL_AD_HANDSHAKE_FAILURE;
723 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
726 s->s3->tmp.new_cipher=c;
730 /* Session-id reuse */
731 #ifdef REUSE_CIPHER_BUG
732 STACK_OF(SSL_CIPHER) *sk;
736 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
738 sk=s->session->ciphers;
739 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
741 c=sk_SSL_CIPHER_value(sk,i);
742 if (c->algorithms & SSL_eNULL)
744 if (SSL_C_IS_EXPORT(c))
748 s->s3->tmp.new_cipher=nc;
750 s->s3->tmp.new_cipher=ec;
752 s->s3->tmp.new_cipher=s->session->cipher;
756 s->s3->tmp.new_cipher=s->session->cipher;
759 /* we now have the following setup.
761 * cipher_list - our prefered list of ciphers
762 * ciphers - the clients prefered list of ciphers
763 * compression - basically ignored right now
764 * ssl version is set - sslv3
765 * s->session - The ssl session has been setup.
766 * s->hit - sesson reuse flag
767 * s->tmp.new_cipher - the new cipher to use.
774 ssl3_send_alert(s,SSL3_AL_FATAL,al);
777 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
781 static int ssl3_send_server_hello(SSL *s)
786 unsigned long l,Time;
788 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
790 buf=(unsigned char *)s->init_buf->data;
791 p=s->s3->server_random;
792 Time=time(NULL); /* Time */
794 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
795 /* Do the message type and length last */
798 *(p++)=s->version>>8;
799 *(p++)=s->version&0xff;
802 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
805 /* now in theory we have 3 options to sending back the
806 * session id. If it is a re-use, we send back the
807 * old session-id, if it is a new session, we send
808 * back the new session-id or we send back a 0 length
809 * session-id if we want it to be single use.
810 * Currently I will not implement the '0' length session-id
811 * 12-Jan-98 - I'll now support the '0' length stuff.
813 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
814 s->session->session_id_length=0;
816 sl=s->session->session_id_length;
818 memcpy(p,s->session->session_id,sl);
822 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
825 /* put the compression method */
826 if (s->s3->tmp.new_compression == NULL)
829 *(p++)=s->s3->tmp.new_compression->id;
834 *(d++)=SSL3_MT_SERVER_HELLO;
837 s->state=SSL3_ST_CW_CLNT_HELLO_B;
838 /* number of bytes to write */
843 /* SSL3_ST_CW_CLNT_HELLO_B */
844 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
847 static int ssl3_send_server_done(SSL *s)
851 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
853 p=(unsigned char *)s->init_buf->data;
856 *(p++)=SSL3_MT_SERVER_DONE;
861 s->state=SSL3_ST_SW_SRVR_DONE_B;
862 /* number of bytes to write */
867 /* SSL3_ST_CW_CLNT_HELLO_B */
868 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
871 static int ssl3_send_server_key_exchange(SSL *s)
877 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
894 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
896 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
901 r[0]=r[1]=r[2]=r[3]=NULL;
907 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
909 rsa=s->cert->rsa_tmp_cb(s,
910 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
911 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
912 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
917 al=SSL_AD_HANDSHAKE_FAILURE;
918 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
923 s->s3->tmp.use_rsa_tmp=1;
931 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
932 dhp=s->cert->dh_tmp_cb(s,
933 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
934 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
937 al=SSL_AD_HANDSHAKE_FAILURE;
938 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
941 if ((dh=DHparams_dup(dhp)) == NULL)
943 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
948 if ((dhp->pub_key == NULL ||
949 dhp->priv_key == NULL ||
950 (s->options & SSL_OP_SINGLE_DH_USE)))
952 if(!DH_generate_key(dh))
954 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
961 dh->pub_key=BN_dup(dhp->pub_key);
962 dh->priv_key=BN_dup(dhp->priv_key);
963 if ((dh->pub_key == NULL) ||
964 (dh->priv_key == NULL))
966 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
977 al=SSL_AD_HANDSHAKE_FAILURE;
978 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
981 for (i=0; r[i] != NULL; i++)
983 nr[i]=BN_num_bytes(r[i]);
987 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
989 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
992 al=SSL_AD_DECODE_ERROR;
995 kn=EVP_PKEY_size(pkey);
1003 if (!BUF_MEM_grow(buf,n+4+kn))
1005 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1008 d=(unsigned char *)s->init_buf->data;
1011 for (i=0; r[i] != NULL; i++)
1021 /* n is the length of the params, they start at &(d[4])
1022 * and p points to the space at the end. */
1024 if (pkey->type == EVP_PKEY_RSA)
1028 for (num=2; num > 0; num--)
1030 EVP_DigestInit(&md_ctx,(num == 2)
1031 ?s->ctx->md5:s->ctx->sha1);
1032 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1033 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1034 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1035 EVP_DigestFinal(&md_ctx,q,
1036 (unsigned int *)&i);
1040 if (RSA_sign(NID_md5_sha1, md_buf, j,
1041 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1043 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1051 #if !defined(NO_DSA)
1052 if (pkey->type == EVP_PKEY_DSA)
1055 EVP_SignInit(&md_ctx,EVP_dss1());
1056 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1057 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1058 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1059 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1060 (unsigned int *)&i,pkey))
1062 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1071 /* Is this error check actually needed? */
1072 al=SSL_AD_HANDSHAKE_FAILURE;
1073 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1078 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1081 /* we should now have things packed up, so lets send
1087 /* SSL3_ST_SW_KEY_EXCH_B */
1088 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1090 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1095 static int ssl3_send_certificate_request(SSL *s)
1097 unsigned char *p,*d;
1099 STACK_OF(X509_NAME) *sk=NULL;
1103 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1107 d=p=(unsigned char *)&(buf->data[4]);
1109 /* get the list of acceptable cert types */
1111 n=ssl3_get_req_cert_type(s,p);
1120 sk=SSL_get_client_CA_list(s);
1124 for (i=0; i<sk_X509_NAME_num(sk); i++)
1126 name=sk_X509_NAME_value(sk,i);
1127 j=i2d_X509_NAME(name,NULL);
1128 if (!BUF_MEM_grow(buf,4+n+j+2))
1130 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1133 p=(unsigned char *)&(buf->data[4+n]);
1134 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1137 i2d_X509_NAME(name,&p);
1144 i2d_X509_NAME(name,&p);
1145 j-=2; s2n(j,d); j+=2;
1151 /* else no CA names */
1152 p=(unsigned char *)&(buf->data[4+off]);
1155 d=(unsigned char *)buf->data;
1156 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1159 /* we should now have things packed up, so lets send
1166 /* SSL3_ST_SW_CERT_REQ_B */
1167 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1172 static int ssl3_get_client_key_exchange(SSL *s)
1180 EVP_PKEY *pkey=NULL;
1187 n=ssl3_get_message(s,
1188 SSL3_ST_SR_KEY_EXCH_A,
1189 SSL3_ST_SR_KEY_EXCH_B,
1190 SSL3_MT_CLIENT_KEY_EXCHANGE,
1194 if (!ok) return((int)n);
1195 p=(unsigned char *)s->init_buf->data;
1197 l=s->s3->tmp.new_cipher->algorithms;
1202 /* FIX THIS UP EAY EAY EAY EAY */
1203 if (s->s3->tmp.use_rsa_tmp)
1205 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1206 rsa=s->cert->rsa_tmp;
1207 /* Don't do a callback because rsa_tmp should
1208 * be sent already */
1211 al=SSL_AD_HANDSHAKE_FAILURE;
1212 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1219 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1220 if ( (pkey == NULL) ||
1221 (pkey->type != EVP_PKEY_RSA) ||
1222 (pkey->pkey.rsa == NULL))
1224 al=SSL_AD_HANDSHAKE_FAILURE;
1225 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1232 if (s->version > SSL3_VERSION)
1237 if (!(s->options & SSL_OP_TLS_D5_BUG))
1239 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1249 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1252 /* If a bad decrypt, use a random master key */
1253 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1254 ((p[0] != (s->client_version>>8)) ||
1255 (p[1] != (s->client_version & 0xff))))
1259 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1260 (p[0] == (s->version>>8)) &&
1263 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1268 p[0]=(s->version>>8);
1269 p[1]=(s->version & 0xff);
1270 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1271 i=SSL_MAX_MASTER_KEY_LENGTH;
1273 /* else, an SSLeay bug, ssl only server, tls client */
1276 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1278 al=SSL_AD_DECODE_ERROR;
1279 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1283 if ((p[0] != (s->client_version>>8)) || (p[1] != (s->client_version & 0xff)))
1285 al=SSL_AD_DECODE_ERROR;
1286 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1291 s->session->master_key_length=
1292 s->method->ssl3_enc->generate_master_secret(s,
1293 s->session->master_key,
1300 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1305 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1307 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1317 if (n == 0L) /* the parameters are in the cert */
1319 al=SSL_AD_HANDSHAKE_FAILURE;
1320 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1325 if (s->s3->tmp.dh == NULL)
1327 al=SSL_AD_HANDSHAKE_FAILURE;
1328 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1332 dh_srvr=s->s3->tmp.dh;
1335 pub=BN_bin2bn(p,i,NULL);
1338 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1342 i=DH_compute_key(p,pub,dh_srvr);
1346 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1350 DH_free(s->s3->tmp.dh);
1355 s->session->master_key_length=
1356 s->method->ssl3_enc->generate_master_secret(s,
1357 s->session->master_key,p,i);
1362 al=SSL_AD_HANDSHAKE_FAILURE;
1363 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1369 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1370 #if !defined(NO_DH) || !defined(NO_RSA)
1376 static int ssl3_get_cert_verify(SSL *s)
1378 EVP_PKEY *pkey=NULL;
1385 n=ssl3_get_message(s,
1386 SSL3_ST_SR_CERT_VRFY_A,
1387 SSL3_ST_SR_CERT_VRFY_B,
1392 if (!ok) return((int)n);
1394 if (s->session->peer != NULL)
1396 peer=s->session->peer;
1397 pkey=X509_get_pubkey(peer);
1398 type=X509_certificate_type(peer,pkey);
1406 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1408 s->s3->tmp.reuse_message=1;
1409 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1411 al=SSL_AD_UNEXPECTED_MESSAGE;
1412 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1421 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1422 al=SSL_AD_UNEXPECTED_MESSAGE;
1426 if (!(type & EVP_PKT_SIGN))
1428 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1429 al=SSL_AD_ILLEGAL_PARAMETER;
1433 if (s->s3->change_cipher_spec)
1435 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1436 al=SSL_AD_UNEXPECTED_MESSAGE;
1440 /* we now have a signature that we need to verify */
1441 p=(unsigned char *)s->init_buf->data;
1446 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1447 al=SSL_AD_DECODE_ERROR;
1451 j=EVP_PKEY_size(pkey);
1452 if ((i > j) || (n > j) || (n <= 0))
1454 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1455 al=SSL_AD_DECODE_ERROR;
1460 if (pkey->type == EVP_PKEY_RSA)
1462 i=RSA_verify(NID_md5_sha1, s->s3->tmp.finish_md,
1463 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1467 al=SSL_AD_DECRYPT_ERROR;
1468 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1473 al=SSL_AD_DECRYPT_ERROR;
1474 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1481 if (pkey->type == EVP_PKEY_DSA)
1483 j=DSA_verify(pkey->save_type,
1484 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1485 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1489 al=SSL_AD_DECRYPT_ERROR;
1490 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1497 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1498 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1507 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1510 EVP_PKEY_free(pkey);
1514 static int ssl3_get_client_certificate(SSL *s)
1516 int i,ok,al,ret= -1;
1518 unsigned long l,nc,llen,n;
1519 unsigned char *p,*d,*q;
1520 STACK_OF(X509) *sk=NULL;
1522 n=ssl3_get_message(s,
1526 #if defined(MSDOS) && !defined(WIN32)
1527 1024*30, /* 30k max cert list :-) */
1529 1024*100, /* 100k max cert list :-) */
1533 if (!ok) return((int)n);
1535 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1537 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1538 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1540 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1541 al=SSL_AD_HANDSHAKE_FAILURE;
1544 /* If tls asked for a client cert, the client must return a 0 list */
1545 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1547 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1548 al=SSL_AD_UNEXPECTED_MESSAGE;
1551 s->s3->tmp.reuse_message=1;
1555 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1557 al=SSL_AD_UNEXPECTED_MESSAGE;
1558 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1561 d=p=(unsigned char *)s->init_buf->data;
1563 if ((sk=sk_X509_new_null()) == NULL)
1565 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1572 al=SSL_AD_DECODE_ERROR;
1573 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1576 for (nc=0; nc<llen; )
1579 if ((l+nc+3) > llen)
1581 al=SSL_AD_DECODE_ERROR;
1582 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1587 x=d2i_X509(NULL,&p,l);
1590 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1595 al=SSL_AD_DECODE_ERROR;
1596 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1599 if (!sk_X509_push(sk,x))
1601 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1608 if (sk_X509_num(sk) <= 0)
1610 /* TLS does not mind 0 certs returned */
1611 if (s->version == SSL3_VERSION)
1613 al=SSL_AD_HANDSHAKE_FAILURE;
1614 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1617 /* Fail for TLS only if we required a certificate */
1618 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1619 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1621 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1622 al=SSL_AD_HANDSHAKE_FAILURE;
1628 i=ssl_verify_cert_chain(s,sk);
1631 al=ssl_verify_alarm_type(s->verify_result);
1632 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1637 if (s->session->peer != NULL) /* This should not be needed */
1638 X509_free(s->session->peer);
1639 s->session->peer=sk_X509_shift(sk);
1640 s->session->verify_result = s->verify_result;
1642 /* With the current implementation, sess_cert will always be NULL
1643 * when we arrive here. */
1644 if (s->session->sess_cert == NULL)
1646 s->session->sess_cert = ssl_sess_cert_new();
1647 if (s->session->sess_cert == NULL)
1649 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1653 if (s->session->sess_cert->cert_chain != NULL)
1654 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1655 s->session->sess_cert->cert_chain=sk;
1663 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1666 if (x != NULL) X509_free(x);
1667 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1671 int ssl3_send_server_certificate(SSL *s)
1676 if (s->state == SSL3_ST_SW_CERT_A)
1678 x=ssl_get_server_send_cert(s);
1681 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1685 l=ssl3_output_cert_chain(s,x);
1686 s->state=SSL3_ST_SW_CERT_B;
1691 /* SSL3_ST_SW_CERT_B */
1692 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));