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);
114 int new_state,state,skip=0;
116 RAND_seed(&Time,sizeof(Time));
120 if (s->info_callback != NULL)
122 else if (s->ctx->info_callback != NULL)
123 cb=s->ctx->info_callback;
125 /* init things to blank */
126 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
130 /* FIX THIS EAY EAY EAY */
131 /* we don't actually need a cert, we just need a cert or a DH_tmp */
132 if (((s->session == NULL) || (s->session->cert == NULL)) &&
135 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
147 case SSL_ST_RENEGOTIATE:
149 /* s->state=SSL_ST_ACCEPT; */
153 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
154 case SSL_ST_OK|SSL_ST_ACCEPT:
157 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
159 if ((s->version>>8) != 3)
161 /* s->version=SSL3_VERSION; */
162 s->type=SSL_ST_ACCEPT;
164 if (s->init_buf == NULL)
166 if ((buf=BUF_MEM_new()) == NULL)
171 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
179 if (!ssl3_setup_buffers(s))
185 /* Ok, we now need to push on a buffering BIO so that
186 * the output is sent in a way that TCP likes :-)
188 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
192 if (s->state != SSL_ST_RENEGOTIATE)
194 s->state=SSL3_ST_SR_CLNT_HELLO_A;
195 ssl3_init_finished_mac(s);
196 s->ctx->stats.sess_accept++;
200 s->ctx->stats.sess_accept_renegotiate++;
201 s->state=SSL3_ST_SW_HELLO_REQ_A;
205 case SSL3_ST_SW_HELLO_REQ_A:
206 case SSL3_ST_SW_HELLO_REQ_B:
209 ret=ssl3_send_hello_request(s);
210 if (ret <= 0) goto end;
211 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
212 s->state=SSL3_ST_SW_FLUSH;
215 ssl3_init_finished_mac(s);
218 case SSL3_ST_SW_HELLO_REQ_C:
224 case SSL3_ST_SR_CLNT_HELLO_A:
225 case SSL3_ST_SR_CLNT_HELLO_B:
226 case SSL3_ST_SR_CLNT_HELLO_C:
229 ret=ssl3_get_client_hello(s);
230 if (ret <= 0) goto end;
231 s->state=SSL3_ST_SW_SRVR_HELLO_A;
235 case SSL3_ST_SW_SRVR_HELLO_A:
236 case SSL3_ST_SW_SRVR_HELLO_B:
237 ret=ssl3_send_server_hello(s);
238 if (ret <= 0) goto end;
241 s->state=SSL3_ST_SW_CHANGE_A;
243 s->state=SSL3_ST_SW_CERT_A;
247 case SSL3_ST_SW_CERT_A:
248 case SSL3_ST_SW_CERT_B:
249 /* Check if it is anon DH */
250 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
252 ret=ssl3_send_server_certificate(s);
253 if (ret <= 0) goto end;
257 s->state=SSL3_ST_SW_KEY_EXCH_A;
261 case SSL3_ST_SW_KEY_EXCH_A:
262 case SSL3_ST_SW_KEY_EXCH_B:
263 l=s->s3->tmp.new_cipher->algorithms;
264 if (s->session->cert == NULL)
268 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
269 s->session->cert=s->cert;
274 /* clear this, it may get reset by
275 * send_server_key_exchange */
276 if (s->options & SSL_OP_EPHEMERAL_RSA)
277 s->s3->tmp.use_rsa_tmp=1;
279 s->s3->tmp.use_rsa_tmp=0;
281 /* only send if a DH key exchange, fortezza or
282 * RSA but we have a sign only certificate */
283 if (s->s3->tmp.use_rsa_tmp
284 || (l & (SSL_DH|SSL_kFZA))
286 && (ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
288 && EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
294 ret=ssl3_send_server_key_exchange(s);
295 if (ret <= 0) goto end;
300 s->state=SSL3_ST_SW_CERT_REQ_A;
304 case SSL3_ST_SW_CERT_REQ_A:
305 case SSL3_ST_SW_CERT_REQ_B:
306 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
307 ((s->session->peer != NULL) &&
308 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
310 /* no cert request */
312 s->s3->tmp.cert_request=0;
313 s->state=SSL3_ST_SW_SRVR_DONE_A;
317 s->s3->tmp.cert_request=1;
318 ret=ssl3_send_certificate_request(s);
319 if (ret <= 0) goto end;
320 s->state=SSL3_ST_SW_SRVR_DONE_A;
325 case SSL3_ST_SW_SRVR_DONE_A:
326 case SSL3_ST_SW_SRVR_DONE_B:
327 ret=ssl3_send_server_done(s);
328 if (ret <= 0) goto end;
329 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
330 s->state=SSL3_ST_SW_FLUSH;
334 case SSL3_ST_SW_FLUSH:
335 /* number of bytes to be flushed */
336 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
339 s->rwstate=SSL_WRITING;
340 num1=BIO_flush(s->wbio);
341 if (num1 <= 0) { ret= -1; goto end; }
342 s->rwstate=SSL_NOTHING;
345 s->state=s->s3->tmp.next_state;
348 case SSL3_ST_SR_CERT_A:
349 case SSL3_ST_SR_CERT_B:
350 /* could be sent for a DH cert, even if we
351 * have not asked for it :-) */
352 ret=ssl3_get_client_certificate(s);
353 if (ret <= 0) goto end;
355 s->state=SSL3_ST_SR_KEY_EXCH_A;
358 case SSL3_ST_SR_KEY_EXCH_A:
359 case SSL3_ST_SR_KEY_EXCH_B:
360 ret=ssl3_get_client_key_exchange(s);
361 if (ret <= 0) goto end;
362 s->state=SSL3_ST_SR_CERT_VRFY_A;
365 /* We need to get hashes here so if there is
366 * a client cert, it can be verified */
367 s->method->ssl3_enc->cert_verify_mac(s,
368 &(s->s3->finish_dgst1),
369 &(s->s3->tmp.finish_md[0]));
370 s->method->ssl3_enc->cert_verify_mac(s,
371 &(s->s3->finish_dgst2),
372 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]));
376 case SSL3_ST_SR_CERT_VRFY_A:
377 case SSL3_ST_SR_CERT_VRFY_B:
379 /* we should decide if we expected this one */
380 ret=ssl3_get_cert_verify(s);
381 if (ret <= 0) goto end;
383 s->state=SSL3_ST_SR_FINISHED_A;
387 case SSL3_ST_SR_FINISHED_A:
388 case SSL3_ST_SR_FINISHED_B:
389 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
390 SSL3_ST_SR_FINISHED_B);
391 if (ret <= 0) goto end;
395 s->state=SSL3_ST_SW_CHANGE_A;
399 case SSL3_ST_SW_CHANGE_A:
400 case SSL3_ST_SW_CHANGE_B:
402 s->session->cipher=s->s3->tmp.new_cipher;
403 if (!s->method->ssl3_enc->setup_key_block(s))
404 { ret= -1; goto end; }
406 ret=ssl3_send_change_cipher_spec(s,
407 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
409 if (ret <= 0) goto end;
410 s->state=SSL3_ST_SW_FINISHED_A;
413 if (!s->method->ssl3_enc->change_cipher_state(s,
414 SSL3_CHANGE_CIPHER_SERVER_WRITE))
422 case SSL3_ST_SW_FINISHED_A:
423 case SSL3_ST_SW_FINISHED_B:
424 ret=ssl3_send_finished(s,
425 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
426 s->method->ssl3_enc->server_finished,
427 s->method->ssl3_enc->server_finished_len);
428 if (ret <= 0) goto end;
429 s->state=SSL3_ST_SW_FLUSH;
431 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
433 s->s3->tmp.next_state=SSL_ST_OK;
438 /* clean a few things up */
439 ssl3_cleanup_key_block(s);
441 BUF_MEM_free(s->init_buf);
444 /* remove buffering on output */
445 ssl_free_wbio_buffer(s);
450 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
452 s->ctx->stats.sess_accept_good++;
454 s->handshake_func=ssl3_accept;
457 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
463 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
469 if (!s->s3->tmp.reuse_message && !skip)
473 if ((ret=BIO_flush(s->wbio)) <= 0)
478 if ((cb != NULL) && (s->state != state))
482 cb(s,SSL_CB_ACCEPT_LOOP,1);
489 /* BIO_flush(s->wbio); */
492 cb(s,SSL_CB_ACCEPT_EXIT,ret);
497 static int ssl3_send_hello_request(SSL *s)
501 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
503 p=(unsigned char *)s->init_buf->data;
504 *(p++)=SSL3_MT_CLIENT_REQUEST;
509 s->state=SSL3_ST_SW_HELLO_REQ_B;
510 /* number of bytes to write */
515 /* SSL3_ST_SW_HELLO_REQ_B */
516 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
519 static int ssl3_get_client_hello(SSL *s)
521 int i,j,ok,al,ret= -1;
524 unsigned char *p,*d,*q;
527 STACK_OF(SSL_CIPHER) *ciphers=NULL;
529 /* We do this so that we will respond with our native type.
530 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
531 * This down switching should be handled by a different method.
532 * If we are SSLv3, we will respond with SSLv3, even if prompted with
535 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
538 s->state=SSL3_ST_SR_CLNT_HELLO_B;
540 n=ssl3_get_message(s,
541 SSL3_ST_SR_CLNT_HELLO_B,
542 SSL3_ST_SR_CLNT_HELLO_C,
543 SSL3_MT_CLIENT_HELLO,
544 SSL3_RT_MAX_PLAIN_LENGTH,
547 if (!ok) return((int)n);
548 d=p=(unsigned char *)s->init_buf->data;
550 /* The version number has already been checked in ssl3_get_message.
551 * I a native TLSv1/SSLv3 method, the match must be correct except
552 * perhaps for the first message */
553 /* s->client_version=(((int)p[0])<<8)|(int)p[1]; */
556 /* load the client random */
557 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
560 /* get the session-id */
566 if (!ssl_get_new_session(s,1))
571 i=ssl_get_prev_session(s,p,j);
573 { /* previous session */
578 if (!ssl_get_new_session(s,1))
585 if ((i == 0) && (j != 0))
587 /* we need a cipher if we are not resuming a session */
588 al=SSL_AD_ILLEGAL_PARAMETER;
589 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
594 /* not enough data */
595 al=SSL_AD_DECODE_ERROR;
596 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
599 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
606 /* If it is a hit, check that the cipher is in the list */
607 if ((s->hit) && (i > 0))
610 id=s->session->cipher->id;
613 printf("client sent %d ciphers\n",sk_num(ciphers));
615 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
617 c=sk_SSL_CIPHER_value(ciphers,i);
619 printf("client [%2d of %2d]:%s\n",
620 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
630 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
632 /* Very bad for multi-threading.... */
633 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
638 /* we need to have the cipher in the cipher
639 * list if we are asked to reuse it */
640 al=SSL_AD_ILLEGAL_PARAMETER;
641 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
652 if (p[j] == 0) break;
659 al=SSL_AD_DECODE_ERROR;
660 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
664 /* Worst case, we will use the NULL compression, but if we have other
665 * options, we will now look for them. We have i-1 compression
666 * algorithms from the client, starting at q. */
667 s->s3->tmp.new_compression=NULL;
668 if (s->ctx->comp_methods != NULL)
669 { /* See if we have a match */
672 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
675 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
688 s->s3->tmp.new_compression=comp;
693 /* TLS does not mind if there is extra stuff */
694 if (s->version == SSL3_VERSION)
698 /* wrong number of bytes,
699 * there could be more to follow */
700 al=SSL_AD_DECODE_ERROR;
701 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
706 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
711 s->session->compress_meth=(comp == NULL)?0:comp->id;
712 if (s->session->ciphers != NULL)
713 sk_SSL_CIPHER_free(s->session->ciphers);
714 s->session->ciphers=ciphers;
717 al=SSL_AD_ILLEGAL_PARAMETER;
718 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
722 c=ssl3_choose_cipher(s,s->session->ciphers,
723 ssl_get_ciphers_by_id(s));
727 al=SSL_AD_HANDSHAKE_FAILURE;
728 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
731 s->s3->tmp.new_cipher=c;
735 /* Session-id reuse */
736 #ifdef REUSE_CIPHER_BUG
737 STACK_OF(SSL_CIPHER) *sk;
741 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
743 sk=s->session->ciphers;
744 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
746 c=sk_SSL_CIPHER_value(sk,i);
747 if (c->algorithms & SSL_eNULL)
749 if (SSL_C_IS_EXPORT(c))
753 s->s3->tmp.new_cipher=nc;
755 s->s3->tmp.new_cipher=ec;
757 s->s3->tmp.new_cipher=s->session->cipher;
761 s->s3->tmp.new_cipher=s->session->cipher;
764 /* we now have the following setup.
766 * cipher_list - our prefered list of ciphers
767 * ciphers - the clients prefered list of ciphers
768 * compression - basically ignored right now
769 * ssl version is set - sslv3
770 * s->session - The ssl session has been setup.
771 * s->hit - sesson reuse flag
772 * s->tmp.new_cipher - the new cipher to use.
779 ssl3_send_alert(s,SSL3_AL_FATAL,al);
782 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
786 static int ssl3_send_server_hello(SSL *s)
791 unsigned long l,Time;
793 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
795 buf=(unsigned char *)s->init_buf->data;
796 p=s->s3->server_random;
797 Time=time(NULL); /* Time */
799 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
800 /* Do the message type and length last */
803 *(p++)=s->version>>8;
804 *(p++)=s->version&0xff;
807 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
810 /* now in theory we have 3 options to sending back the
811 * session id. If it is a re-use, we send back the
812 * old session-id, if it is a new session, we send
813 * back the new session-id or we send back a 0 length
814 * session-id if we want it to be single use.
815 * Currently I will not implement the '0' length session-id
816 * 12-Jan-98 - I'll now support the '0' length stuff.
818 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
819 s->session->session_id_length=0;
821 sl=s->session->session_id_length;
823 memcpy(p,s->session->session_id,sl);
827 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
830 /* put the compression method */
831 if (s->s3->tmp.new_compression == NULL)
834 *(p++)=s->s3->tmp.new_compression->id;
839 *(d++)=SSL3_MT_SERVER_HELLO;
842 s->state=SSL3_ST_CW_CLNT_HELLO_B;
843 /* number of bytes to write */
848 /* SSL3_ST_CW_CLNT_HELLO_B */
849 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
852 static int ssl3_send_server_done(SSL *s)
856 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
858 p=(unsigned char *)s->init_buf->data;
861 *(p++)=SSL3_MT_SERVER_DONE;
866 s->state=SSL3_ST_SW_SRVR_DONE_B;
867 /* number of bytes to write */
872 /* SSL3_ST_CW_CLNT_HELLO_B */
873 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
876 static int ssl3_send_server_key_exchange(SSL *s)
882 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
898 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
900 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
901 cert=s->session->cert;
905 r[0]=r[1]=r[2]=r[3]=NULL;
911 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
913 rsa=s->cert->rsa_tmp_cb(s,
914 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
915 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
916 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
921 al=SSL_AD_HANDSHAKE_FAILURE;
922 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
927 s->s3->tmp.use_rsa_tmp=1;
935 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
936 dhp=s->cert->dh_tmp_cb(s,
937 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
938 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
941 al=SSL_AD_HANDSHAKE_FAILURE;
942 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
945 if ((dh=DHparams_dup(dhp)) == NULL)
947 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
952 if ((dhp->pub_key == NULL ||
953 dhp->priv_key == NULL ||
954 (s->options & SSL_OP_SINGLE_DH_USE)))
956 if(!DH_generate_key(dh))
958 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
965 dh->pub_key=BN_dup(dhp->pub_key);
966 dh->priv_key=BN_dup(dhp->priv_key);
967 if ((dh->pub_key == NULL) ||
968 (dh->priv_key == NULL))
970 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
981 al=SSL_AD_HANDSHAKE_FAILURE;
982 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
985 for (i=0; r[i] != NULL; i++)
987 nr[i]=BN_num_bytes(r[i]);
991 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
993 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
996 al=SSL_AD_DECODE_ERROR;
999 kn=EVP_PKEY_size(pkey);
1007 if (!BUF_MEM_grow(buf,n+4+kn))
1009 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1012 d=(unsigned char *)s->init_buf->data;
1015 for (i=0; r[i] != NULL; i++)
1025 /* n is the length of the params, they start at &(d[4])
1026 * and p points to the space at the end. */
1028 if (pkey->type == EVP_PKEY_RSA)
1032 for (num=2; num > 0; num--)
1034 EVP_DigestInit(&md_ctx,(num == 2)
1035 ?s->ctx->md5:s->ctx->sha1);
1036 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1037 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1038 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1039 EVP_DigestFinal(&md_ctx,q,
1040 (unsigned int *)&i);
1044 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1045 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1048 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1056 #if !defined(NO_DSA)
1057 if (pkey->type == EVP_PKEY_DSA)
1060 EVP_SignInit(&md_ctx,EVP_dss1());
1061 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1062 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1063 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1064 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1065 (unsigned int *)&i,pkey))
1067 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1076 /* Is this error check actually needed? */
1077 al=SSL_AD_HANDSHAKE_FAILURE;
1078 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1083 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1086 /* we should now have things packed up, so lets send
1092 /* SSL3_ST_SW_KEY_EXCH_B */
1093 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1095 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1100 static int ssl3_send_certificate_request(SSL *s)
1102 unsigned char *p,*d;
1104 STACK_OF(X509_NAME) *sk=NULL;
1108 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1112 d=p=(unsigned char *)&(buf->data[4]);
1114 /* get the list of acceptable cert types */
1116 n=ssl3_get_req_cert_type(s,p);
1125 sk=SSL_get_client_CA_list(s);
1129 for (i=0; i<sk_X509_NAME_num(sk); i++)
1131 name=sk_X509_NAME_value(sk,i);
1132 j=i2d_X509_NAME(name,NULL);
1133 if (!BUF_MEM_grow(buf,4+n+j+2))
1135 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1138 p=(unsigned char *)&(buf->data[4+n]);
1139 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1142 i2d_X509_NAME(name,&p);
1149 i2d_X509_NAME(name,&p);
1150 j-=2; s2n(j,d); j+=2;
1156 /* else no CA names */
1157 p=(unsigned char *)&(buf->data[4+off]);
1160 d=(unsigned char *)buf->data;
1161 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1164 /* we should now have things packed up, so lets send
1171 /* SSL3_ST_SW_CERT_REQ_B */
1172 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1177 static int ssl3_get_client_key_exchange(SSL *s)
1185 EVP_PKEY *pkey=NULL;
1192 n=ssl3_get_message(s,
1193 SSL3_ST_SR_KEY_EXCH_A,
1194 SSL3_ST_SR_KEY_EXCH_B,
1195 SSL3_MT_CLIENT_KEY_EXCHANGE,
1199 if (!ok) return((int)n);
1200 p=(unsigned char *)s->init_buf->data;
1202 l=s->s3->tmp.new_cipher->algorithms;
1207 /* FIX THIS UP EAY EAY EAY EAY */
1208 if (s->s3->tmp.use_rsa_tmp)
1210 if ((s->session->cert != NULL) &&
1211 (s->session->cert->rsa_tmp != NULL))
1212 rsa=s->session->cert->rsa_tmp;
1213 else if ((s->cert != NULL) &&
1214 (s->cert->rsa_tmp != NULL))
1215 rsa=s->cert->rsa_tmp;
1216 /* Don't do a callback because rsa_tmp should
1217 * be sent already */
1220 al=SSL_AD_HANDSHAKE_FAILURE;
1221 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1228 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1229 if ( (pkey == NULL) ||
1230 (pkey->type != EVP_PKEY_RSA) ||
1231 (pkey->pkey.rsa == NULL))
1233 al=SSL_AD_HANDSHAKE_FAILURE;
1234 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1241 if (s->version > SSL3_VERSION)
1246 if (!(s->options & SSL_OP_TLS_D5_BUG))
1248 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1258 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1261 /* If a bad decrypt, use a random master key */
1262 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1263 ((p[0] != (s->client_version>>8)) ||
1264 (p[1] != (s->client_version & 0xff))))
1268 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1269 (p[0] == (s->version>>8)) &&
1272 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1277 p[0]=(s->version>>8);
1278 p[1]=(s->version & 0xff);
1279 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1280 i=SSL_MAX_MASTER_KEY_LENGTH;
1282 /* else, an SSLeay bug, ssl only server, tls client */
1285 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1287 al=SSL_AD_DECODE_ERROR;
1288 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1292 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1294 al=SSL_AD_DECODE_ERROR;
1295 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1300 s->session->master_key_length=
1301 s->method->ssl3_enc->generate_master_secret(s,
1302 s->session->master_key,
1309 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1314 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1316 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1326 if (n == 0L) /* the parameters are in the cert */
1328 al=SSL_AD_HANDSHAKE_FAILURE;
1329 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1334 if (s->s3->tmp.dh == NULL)
1336 al=SSL_AD_HANDSHAKE_FAILURE;
1337 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1341 dh_srvr=s->s3->tmp.dh;
1344 pub=BN_bin2bn(p,i,NULL);
1347 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1351 i=DH_compute_key(p,pub,dh_srvr);
1355 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1359 DH_free(s->s3->tmp.dh);
1364 s->session->master_key_length=
1365 s->method->ssl3_enc->generate_master_secret(s,
1366 s->session->master_key,p,i);
1371 al=SSL_AD_HANDSHAKE_FAILURE;
1372 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1378 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1379 #if !defined(NO_DH) || !defined(NO_RSA)
1385 static int ssl3_get_cert_verify(SSL *s)
1387 EVP_PKEY *pkey=NULL;
1394 n=ssl3_get_message(s,
1395 SSL3_ST_SR_CERT_VRFY_A,
1396 SSL3_ST_SR_CERT_VRFY_B,
1401 if (!ok) return((int)n);
1403 if (s->session->peer != NULL)
1405 peer=s->session->peer;
1406 pkey=X509_get_pubkey(peer);
1407 type=X509_certificate_type(peer,pkey);
1415 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1417 s->s3->tmp.reuse_message=1;
1418 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1420 al=SSL_AD_UNEXPECTED_MESSAGE;
1421 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1430 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1431 al=SSL_AD_UNEXPECTED_MESSAGE;
1435 if (!(type & EVP_PKT_SIGN))
1437 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1438 al=SSL_AD_ILLEGAL_PARAMETER;
1442 if (s->s3->change_cipher_spec)
1444 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1445 al=SSL_AD_UNEXPECTED_MESSAGE;
1449 /* we now have a signature that we need to verify */
1450 p=(unsigned char *)s->init_buf->data;
1455 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1456 al=SSL_AD_DECODE_ERROR;
1460 j=EVP_PKEY_size(pkey);
1461 if ((i > j) || (n > j) || (n <= 0))
1463 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1464 al=SSL_AD_DECODE_ERROR;
1469 if (pkey->type == EVP_PKEY_RSA)
1471 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1474 al=SSL_AD_DECRYPT_ERROR;
1475 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1478 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1479 memcmp(&(s->s3->tmp.finish_md[0]),p,
1480 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH))
1482 al=SSL_AD_DECRYPT_ERROR;
1483 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1490 if (pkey->type == EVP_PKEY_DSA)
1492 j=DSA_verify(pkey->save_type,
1493 &(s->s3->tmp.finish_md[MD5_DIGEST_LENGTH]),
1494 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1498 al=SSL_AD_DECRYPT_ERROR;
1499 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1506 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1507 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1516 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1519 EVP_PKEY_free(pkey);
1523 static int ssl3_get_client_certificate(SSL *s)
1525 int i,ok,al,ret= -1;
1527 unsigned long l,nc,llen,n;
1528 unsigned char *p,*d,*q;
1529 STACK_OF(X509) *sk=NULL;
1531 n=ssl3_get_message(s,
1535 #if defined(MSDOS) && !defined(WIN32)
1536 1024*30, /* 30k max cert list :-) */
1538 1024*100, /* 100k max cert list :-) */
1542 if (!ok) return((int)n);
1544 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1546 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1547 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1549 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1550 al=SSL_AD_HANDSHAKE_FAILURE;
1553 /* If tls asked for a client cert we must return a 0 list */
1554 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1556 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1557 al=SSL_AD_UNEXPECTED_MESSAGE;
1560 s->s3->tmp.reuse_message=1;
1564 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1566 al=SSL_AD_UNEXPECTED_MESSAGE;
1567 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1570 d=p=(unsigned char *)s->init_buf->data;
1572 if ((sk=sk_X509_new_null()) == NULL)
1574 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1581 al=SSL_AD_DECODE_ERROR;
1582 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1585 for (nc=0; nc<llen; )
1588 if ((l+nc+3) > llen)
1590 al=SSL_AD_DECODE_ERROR;
1591 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1596 x=d2i_X509(NULL,&p,l);
1599 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1604 al=SSL_AD_DECODE_ERROR;
1605 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1608 if (!sk_X509_push(sk,x))
1610 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1617 if (sk_X509_num(sk) <= 0)
1619 /* TLS does not mind 0 certs returned */
1620 if (s->version == SSL3_VERSION)
1622 al=SSL_AD_HANDSHAKE_FAILURE;
1623 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1626 /* Fail for TLS only if we required a certificate */
1627 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1628 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1630 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1631 al=SSL_AD_HANDSHAKE_FAILURE;
1637 i=ssl_verify_cert_chain(s,sk);
1640 al=ssl_verify_alarm_type(s->verify_result);
1641 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1646 /* This should not be needed */
1647 if (s->session->peer != NULL)
1648 X509_free(s->session->peer);
1649 s->session->peer=sk_X509_shift(sk);
1651 s->session->cert->cert_chain=sk;
1659 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1662 if (x != NULL) X509_free(x);
1663 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1667 int ssl3_send_server_certificate(SSL *s)
1672 if (s->state == SSL3_ST_SW_CERT_A)
1674 x=ssl_get_server_send_cert(s);
1677 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1681 l=ssl3_output_cert_chain(s,x);
1682 s->state=SSL3_ST_SW_CERT_B;
1687 /* SSL3_ST_SW_CERT_B */
1688 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));