2 /* Copyright (C) 1995-1997 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
70 /* SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_MALLOC_FAILURE);
71 * SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
72 * SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
73 * SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_MALLOC_FAILURE);
74 * SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
78 static int ssl3_get_client_hello(SSL *s);
79 static int ssl3_send_server_hello(SSL *s);
80 static int ssl3_send_server_key_exchange(SSL *s);
81 static int ssl3_send_certificate_request(SSL *s);
82 static int ssl3_send_server_done(SSL *s);
83 static int ssl3_get_cert_verify(SSL *s);
84 static int ssl3_get_client_key_exchange(SSL *s);
85 static int ssl3_get_client_certificate(SSL *s);
86 static int ssl3_send_hello_request(SSL *s);
90 static int ssl3_get_client_hello();
91 static int ssl3_send_server_hello();
92 static int ssl3_send_server_key_exchange();
93 static int ssl3_send_certificate_request();
94 static int ssl3_send_server_done();
95 static int ssl3_get_cert_verify();
96 static int ssl3_get_client_key_exchange();
97 static int ssl3_get_client_certificate();
98 static int ssl3_send_hello_request();
99 static SSL_METHOD *ssl3_get_server_method();
103 static SSL_METHOD *ssl3_get_server_method(ver)
107 return(SSLv3_server_method());
112 SSL_METHOD *SSLv3_server_method()
115 static SSL_METHOD SSLv3_server_data;
120 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
122 SSLv3_server_data.ssl_accept=ssl3_accept;
123 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
125 return(&SSLv3_server_data);
132 unsigned long l,Time=time(NULL);
138 int new_state,state,skip=0;
140 RAND_seed((unsigned char *)&Time,sizeof(Time));
144 if (s->info_callback != NULL)
146 else if (s->ctx->info_callback != NULL)
147 cb=s->ctx->info_callback;
149 /* init things to blank */
150 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
154 /* FIX THIS EAY EAY EAY */
155 /* we don't actually need a cert, we just need a cert or a DH_tmp */
156 if (((s->session == NULL) || (s->session->cert == NULL)) &&
159 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
171 case SSL_ST_RENEGOTIATE:
173 /* s->state=SSL_ST_ACCEPT; */
177 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
178 case SSL_ST_OK|SSL_ST_ACCEPT:
180 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
183 s->type=SSL_ST_ACCEPT;
185 if (s->init_buf == NULL)
187 if ((buf=BUF_MEM_new()) == NULL)
192 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
200 if (!ssl3_setup_buffers(s))
206 /* Ok, we now need to push on a buffering BIO so that
207 * the output is sent in a way that TCP likes :-)
211 bbio=BIO_new(BIO_f_buffer());
214 SSLerr(SSL_F_SSL3_ACCEPT,ERR_LIB_BUF);
223 if (!BIO_set_write_buffer_size(bbio,16*1024))
225 SSLerr(SSL_F_SSL3_ACCEPT,ERR_LIB_BUF);
230 s->wbio=BIO_push(bbio,s->wbio);
232 s->ctx->sess_accept++;
235 if (s->state != SSL_ST_RENEGOTIATE)
237 s->state=SSL3_ST_SR_CLNT_HELLO_A;
238 ssl3_init_finished_mac(s);
242 s->state=SSL3_ST_SW_HELLO_REQ_A;
246 case SSL3_ST_SW_HELLO_REQ_A:
247 case SSL3_ST_SW_HELLO_REQ_B:
250 ret=ssl3_send_hello_request(s);
251 if (ret <= 0) goto end;
252 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
253 s->state=SSL3_ST_SW_FLUSH;
256 ssl3_init_finished_mac(s);
259 case SSL3_ST_SW_HELLO_REQ_C:
260 /* remove buffering on output */
261 under=BIO_pop(s->wbio);
274 case SSL3_ST_SR_CLNT_HELLO_A:
275 case SSL3_ST_SR_CLNT_HELLO_B:
276 case SSL3_ST_SR_CLNT_HELLO_C:
279 ret=ssl3_get_client_hello(s);
280 if (ret <= 0) goto end;
281 s->state=SSL3_ST_SW_SRVR_HELLO_A;
285 case SSL3_ST_SW_SRVR_HELLO_A:
286 case SSL3_ST_SW_SRVR_HELLO_B:
287 ret=ssl3_send_server_hello(s);
288 if (ret <= 0) goto end;
291 s->state=SSL3_ST_SW_CHANGE_A;
293 s->state=SSL3_ST_SW_CERT_A;
297 case SSL3_ST_SW_CERT_A:
298 case SSL3_ST_SW_CERT_B:
299 /* Check if it is anon DH */
300 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
302 ret=ssl3_send_server_certificate(s);
303 if (ret <= 0) goto end;
307 s->state=SSL3_ST_SW_KEY_EXCH_A;
311 case SSL3_ST_SW_KEY_EXCH_A:
312 case SSL3_ST_SW_KEY_EXCH_B:
313 l=s->s3->tmp.new_cipher->algorithms;
314 if (s->session->cert == NULL)
318 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
319 s->session->cert=s->cert;
323 CRYPTO_add(&s->ctx->default_cert->references,1,CRYPTO_LOCK_SSL_CERT);
324 s->session->cert=s->ctx->default_cert;
329 /* clear this, it may get reset by
330 * send_server_key_exchange */
331 if (s->ctx->options & SSL_OP_EPHEMERAL_RSA)
332 s->s3->tmp.use_rsa_tmp=1;
334 s->s3->tmp.use_rsa_tmp=0;
336 /* only send if a DH key exchange, fortezza or
337 * RSA but we have a sign only certificate */
338 if ( s->s3->tmp.use_rsa_tmp ||
339 (l & (SSL_DH|SSL_kFZA)) ||
341 ((ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)||
343 (EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > 512)
349 ret=ssl3_send_server_key_exchange(s);
350 if (ret <= 0) goto end;
355 s->state=SSL3_ST_SW_CERT_REQ_A;
359 case SSL3_ST_SW_CERT_REQ_A:
360 case SSL3_ST_SW_CERT_REQ_B:
361 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
362 ((s->session->peer != NULL) &&
363 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
365 /* no cert request */
367 s->state=SSL3_ST_SW_SRVR_DONE_A;
371 ret=ssl3_send_certificate_request(s);
372 if (ret <= 0) goto end;
373 s->state=SSL3_ST_SW_SRVR_DONE_A;
378 case SSL3_ST_SW_SRVR_DONE_A:
379 case SSL3_ST_SW_SRVR_DONE_B:
380 ret=ssl3_send_server_done(s);
381 if (ret <= 0) goto end;
382 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
383 s->state=SSL3_ST_SW_FLUSH;
387 case SSL3_ST_SW_FLUSH:
388 /* number of bytes to be flushed */
389 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
392 s->rwstate=SSL_WRITING;
393 num1=BIO_flush(s->wbio);
394 if (num1 <= 0) { ret= -1; goto end; }
395 s->rwstate=SSL_NOTHING;
398 s->state=s->s3->tmp.next_state;
401 case SSL3_ST_SR_CERT_A:
402 case SSL3_ST_SR_CERT_B:
403 /* could be sent for a DH cert, even if we
404 * have not asked for it :-) */
405 ret=ssl3_get_client_certificate(s);
406 if (ret <= 0) goto end;
408 s->state=SSL3_ST_SR_KEY_EXCH_A;
411 case SSL3_ST_SR_KEY_EXCH_A:
412 case SSL3_ST_SR_KEY_EXCH_B:
413 ret=ssl3_get_client_key_exchange(s);
414 if (ret <= 0) goto end;
415 s->state=SSL3_ST_SR_CERT_VRFY_A;
418 /* We need to get hashes here so if there is
419 * a client cert, it can be verified */
420 ssl3_final_finish_mac(s,&(s->s3->finish_dgst1),
421 NULL,&(s->s3->tmp.finish_md1[0]));
422 ssl3_final_finish_mac(s,&(s->s3->finish_dgst2),
423 NULL,&(s->s3->tmp.finish_md2[0]));
427 case SSL3_ST_SR_CERT_VRFY_A:
428 case SSL3_ST_SR_CERT_VRFY_B:
430 /* we should decide if we expected this one */
431 ret=ssl3_get_cert_verify(s);
432 if (ret <= 0) goto end;
434 s->state=SSL3_ST_SR_FINISHED_A;
438 case SSL3_ST_SR_FINISHED_A:
439 case SSL3_ST_SR_FINISHED_B:
440 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
441 SSL3_ST_SR_FINISHED_B,
442 &(ssl3_client_finished_const[0]));
443 if (ret <= 0) goto end;
447 s->state=SSL3_ST_SW_CHANGE_A;
451 case SSL3_ST_SW_CHANGE_A:
452 case SSL3_ST_SW_CHANGE_B:
454 s->session->cipher=s->s3->tmp.new_cipher;
455 if (!ssl3_setup_key_block(s)) { ret= -1; goto end; }
457 ret=ssl3_send_change_cipher_spec(s,
458 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
460 if (ret <= 0) goto end;
461 s->state=SSL3_ST_SW_FINISHED_A;
464 if (!ssl3_change_cipher_state(s,
465 SSL3_CHANGE_CIPHER_SERVER_WRITE))
473 case SSL3_ST_SW_FINISHED_A:
474 case SSL3_ST_SW_FINISHED_B:
475 ret=ssl3_send_finished(s,
476 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
477 &(ssl3_server_finished_const[0]));
478 if (ret <= 0) goto end;
479 s->state=SSL3_ST_SW_FLUSH;
481 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
483 s->s3->tmp.next_state=SSL_ST_OK;
488 /* clean a few things up */
489 ssl3_cleanup_key_block(s);
491 BUF_MEM_free(s->init_buf);
494 /* remove buffering on output */
495 under=BIO_pop(s->wbio);
506 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
508 s->ctx->sess_accept_good++;
510 s->handshake_func=ssl3_accept;
513 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
519 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
525 if (!s->s3->tmp.reuse_message && !skip)
527 if (s->debug) BIO_flush(s->wbio);
529 if ((cb != NULL) && (s->state != state))
533 cb(s,SSL_CB_ACCEPT_LOOP,1);
540 /* BIO_flush(s->wbio); */
543 cb(s,SSL_CB_ACCEPT_EXIT,ret);
548 static int ssl3_send_hello_request(s)
553 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
555 p=(unsigned char *)s->init_buf->data;
556 *(p++)=SSL3_MT_CLIENT_REQUEST;
561 s->state=SSL3_ST_SW_HELLO_REQ_B;
562 /* number of bytes to write */
567 /* SSL3_ST_SW_HELLO_REQ_B */
568 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
571 static int ssl3_get_client_hello(s)
574 int i,j,ok,al,ret= -1;
581 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
584 s->state=SSL3_ST_SR_CLNT_HELLO_B;
586 n=ssl3_get_message(s,
587 SSL3_ST_SR_CLNT_HELLO_B,
588 SSL3_ST_SR_CLNT_HELLO_C,
589 SSL3_MT_CLIENT_HELLO,
590 SSL3_RT_MAX_PLAIN_LENGTH,
593 if (!ok) return((int)n);
594 d=p=(unsigned char *)s->init_buf->data;
596 if (p[0] != SSL3_VERSION_MAJOR)
598 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
603 /* load the client random */
604 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
607 /* get the session-id */
613 if (!ssl_get_new_session(s,1))
618 i=ssl_get_prev_session(s,j,p);
620 { /* previous session */
625 if (!ssl_get_new_session(s,1))
632 if ((i == 0) && (j != 0))
634 /* we need a cipher if we are not resuming a session */
635 al=SSL3_AD_ILLEGAL_PARAMETER;
636 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
641 /* not enough data */
642 al=SSL3_AD_ILLEGAL_PARAMETER;
643 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
646 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
653 /* If it is a hit, check that the cipher is in the list */
654 if ((s->hit) && (i > 0))
657 id=s->session->cipher->id;
659 for (i=0; i<sk_num(ciphers); i++)
661 c=(SSL_CIPHER *)sk_value(ciphers,i);
670 if ((s->ctx->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_num(ciphers) == 1))
672 /* Very bad for multi-threading.... */
674 (SSL_CIPHER *)sk_value(ciphers,0);
678 /* we need to have the cipher in the cipher
679 * list if we are asked to reuse it */
680 al=SSL3_AD_ILLEGAL_PARAMETER;
681 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
690 if (p[j] == 0) break;
696 al=SSL3_AD_ILLEGAL_PARAMETER;
697 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
703 /* wrong number of bytes,
704 * there could be more to follow */
705 al=SSL3_AD_ILLEGAL_PARAMETER;
706 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
710 /* do nothing with compression */
712 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
717 if (s->session->ciphers != NULL)
718 sk_free(s->session->ciphers);
719 s->session->ciphers=ciphers;
722 al=SSL3_AD_HANDSHAKE_FAILURE;
723 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
727 c=ssl3_choose_cipher(s,s->session->ciphers,
728 ssl_get_ciphers_by_id(s));
732 al=SSL3_AD_HANDSHAKE_FAILURE;
733 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
736 s->s3->tmp.new_cipher=c;
740 /* Session-id reuse */
741 #ifdef REUSE_CIPHER_BUG
746 if (s->ctx->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
748 sk=s->session->ciphers;
749 for (i=0; i<sk_num(sk); i++)
751 c=(SSL_CIPHER *)sk_value(sk,i);
752 if (c->algorithms & SSL_eNULL)
754 if (c->algorithms & SSL_EXP)
758 s->s3->tmp.new_cipher=nc;
760 s->s3->tmp.new_cipher=ec;
762 s->s3->tmp.new_cipher=s->session->cipher;
766 s->s3->tmp.new_cipher=s->session->cipher;
769 /* we now have the following setup.
771 * cipher_list - our prefered list of ciphers
772 * ciphers - the clients prefered list of ciphers
773 * compression - basically ignored right now
774 * ssl version is set - sslv3
775 * s->session - The ssl session has been setup.
776 * s->hit - sesson reuse flag
777 * s->tmp.new_cipher - the new cipher to use.
784 ssl3_send_alert(s,SSL3_AL_FATAL,al);
787 if (ciphers != NULL) sk_free(ciphers);
791 static int ssl3_send_server_hello(s)
797 unsigned long l,Time;
799 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
801 buf=(unsigned char *)s->init_buf->data;
802 p=s->s3->server_random;
803 Time=time(NULL); /* Time */
805 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
806 /* Do the message type and length last */
809 *(p++)=SSL3_VERSION_MAJOR;
810 *(p++)=SSL3_VERSION_MINOR;
813 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
816 /* now in theory we have 3 options to sending back the
817 * session id. If it is a re-use, we send back the
818 * old session-id, if it is a new session, we send
819 * back the new session-id or we send back a 0 length
820 * session-id if we want it to be single use.
821 * Currently I will not implement the '0' length session-id
824 sl=s->session->session_id_length;
826 memcpy(p,s->session->session_id,sl);
830 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
833 /* put the compression method */
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(s)
857 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
859 p=(unsigned char *)s->init_buf->data;
862 *(p++)=SSL3_MT_SERVER_DONE;
867 s->state=SSL3_ST_SW_SRVR_DONE_B;
868 /* number of bytes to write */
873 /* SSL3_ST_CW_CLNT_HELLO_B */
874 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
877 static int ssl3_send_server_key_exchange(s)
884 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
900 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
902 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
903 cert=s->session->cert;
907 r[0]=r[1]=r[2]=r[3]=NULL;
913 if ((rsa == NULL) && (s->ctx->default_cert->rsa_tmp_cb != NULL))
915 rsa=s->ctx->default_cert->rsa_tmp_cb(s,
916 (s->s3->tmp.new_cipher->algorithms|
918 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
923 al=SSL3_AD_HANDSHAKE_FAILURE;
924 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
929 s->s3->tmp.use_rsa_tmp=1;
937 if ((dhp == NULL) && (cert->dh_tmp_cb != NULL))
938 dhp=cert->dh_tmp_cb(s,
939 (s->s3->tmp.new_cipher->algorithms|
943 al=SSL3_AD_HANDSHAKE_FAILURE;
944 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
947 if ((dh=DHparams_dup(dhp)) == NULL)
949 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
954 if (((dhp->pub_key == NULL) ||
955 (dhp->priv_key == NULL) ||
956 (s->ctx->options & SSL_OP_SINGLE_DH_USE)) &&
957 (!DH_generate_key(dh)))
959 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
964 dh->pub_key=BN_dup(dhp->pub_key);
965 dh->priv_key=BN_dup(dhp->priv_key);
966 if ((dh->pub_key == NULL) ||
967 (dh->priv_key == NULL))
969 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
980 al=SSL3_AD_HANDSHAKE_FAILURE;
981 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
984 for (i=0; r[i] != NULL; i++)
986 nr[i]=BN_num_bytes(r[i]);
990 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
992 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
995 al=SSL3_AD_HANDSHAKE_FAILURE;
998 kn=EVP_PKEY_size(pkey);
1006 if (!BUF_MEM_grow(buf,n+4+kn))
1008 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1011 d=(unsigned char *)s->init_buf->data;
1014 for (i=0; r[i] != NULL; i++)
1024 /* n is the length of the params, they start at &(d[4])
1025 * and p points to the space at the end. */
1027 if (pkey->type == EVP_PKEY_RSA)
1031 for (num=2; num > 0; num--)
1033 EVP_DigestInit(&md_ctx,(num == 2)?EVP_md5():EVP_sha1());
1034 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1035 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1036 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1037 EVP_DigestFinal(&md_ctx,q,
1038 (unsigned int *)&i);
1042 i=RSA_private_encrypt(j,md_buf,&(p[2]),
1043 pkey->pkey.rsa,RSA_PKCS1_PADDING);
1046 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1054 #if !defined(NO_DSA)
1055 if (pkey->type == EVP_PKEY_DSA)
1058 EVP_SignInit(&md_ctx,EVP_dss1());
1059 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1060 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1061 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1062 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1063 (unsigned int *)&i,pkey))
1065 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1074 /* Is this error check actually needed? */
1075 al=SSL3_AD_HANDSHAKE_FAILURE;
1076 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1081 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1084 /* we should now have things packed up, so lets send
1090 /* SSL3_ST_SW_KEY_EXCH_B */
1091 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1093 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1098 static int ssl3_send_certificate_request(s)
1101 unsigned char *p,*d;
1107 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1111 d=p=(unsigned char *)&(buf->data[4]);
1113 /* get the list of acceptable cert types */
1115 n=ssl3_get_req_cert_type(s,p);
1124 sk=SSL_get_client_CA_list(s);
1128 for (i=0; i<sk_num(sk); i++)
1130 name=(X509_NAME *)sk_value(sk,i);
1131 j=i2d_X509_NAME(name,NULL);
1132 if (!BUF_MEM_grow(buf,4+n+j+2))
1134 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1137 p=(unsigned char *)&(buf->data[4+n]);
1138 if (!(s->ctx->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1141 i2d_X509_NAME(name,&p);
1148 i2d_X509_NAME(name,&p);
1149 j-=2; s2n(j,d); j+=2;
1155 /* else no CA names */
1156 p=(unsigned char *)&(buf->data[4+off]);
1159 d=(unsigned char *)buf->data;
1160 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1163 /* we should now have things packed up, so lets send
1170 /* SSL3_ST_SW_CERT_REQ_B */
1171 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1176 static int ssl3_get_client_key_exchange(s)
1185 EVP_PKEY *pkey=NULL;
1188 n=ssl3_get_message(s,
1189 SSL3_ST_SR_KEY_EXCH_A,
1190 SSL3_ST_SR_KEY_EXCH_B,
1191 SSL3_MT_CLIENT_KEY_EXCHANGE,
1195 if (!ok) return((int)n);
1196 p=(unsigned char *)s->init_buf->data;
1198 l=s->s3->tmp.new_cipher->algorithms;
1203 /* FIX THIS UP EAY EAY EAY EAY */
1204 if (s->s3->tmp.use_rsa_tmp)
1206 if ((s->session->cert != NULL) &&
1207 (s->session->cert->rsa_tmp != NULL))
1208 rsa=s->session->cert->rsa_tmp;
1209 else if ((s->ctx->default_cert != NULL) &&
1210 (s->ctx->default_cert->rsa_tmp != NULL))
1211 rsa=s->ctx->default_cert->rsa_tmp;
1212 /* Don't do a callback because rsa_tmp should
1213 * be sent already */
1216 al=SSL3_AD_HANDSHAKE_FAILURE;
1217 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1224 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1225 if ( (pkey == NULL) ||
1226 (pkey->type != EVP_PKEY_RSA) ||
1227 (pkey->pkey.rsa == NULL))
1229 al=SSL3_AD_HANDSHAKE_FAILURE;
1230 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1236 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1238 /* If a bad decrypt, use a dud master key */
1239 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1245 RAND_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1246 i=SSL_MAX_MASTER_KEY_LENGTH;
1249 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1251 al=SSL_AD_DECODE_ERROR;
1252 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1256 if ((p[0] != (s->version>>8)) || (p[1] != (s->version & 0xff)))
1258 al=SSL_AD_DECODE_ERROR;
1259 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1264 s->session->master_key_length=
1265 ssl3_generate_master_secret(s,
1266 s->session->master_key,
1273 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1279 if (!(s->ctx->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1281 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1291 if (n == 0L) /* the parameters are in the cert */
1293 al=SSL3_AD_HANDSHAKE_FAILURE;
1294 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1299 if (s->s3->tmp.dh == NULL)
1301 al=SSL3_AD_HANDSHAKE_FAILURE;
1302 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1306 dh_srvr=s->s3->tmp.dh;
1309 pub=BN_bin2bn(p,i,NULL);
1312 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1315 i=DH_compute_key(p,pub,dh_srvr);
1319 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1323 DH_free(s->s3->tmp.dh);
1328 s->session->master_key_length=
1329 ssl3_generate_master_secret(s,
1330 s->session->master_key,p,i);
1335 al=SSL3_AD_HANDSHAKE_FAILURE;
1336 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1342 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1347 static int ssl3_get_cert_verify(s)
1350 EVP_PKEY *pkey=NULL;
1357 n=ssl3_get_message(s,
1358 SSL3_ST_SR_CERT_VRFY_A,
1359 SSL3_ST_SR_CERT_VRFY_B,
1364 if (!ok) return((int)n);
1366 if (s->session->peer != NULL)
1368 peer=s->session->peer;
1369 pkey=X509_get_pubkey(peer);
1370 type=X509_certificate_type(peer,pkey);
1378 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1380 s->s3->tmp.reuse_message=1;
1381 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1383 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1384 al=SSL3_AD_UNEXPECTED_MESSAGE;
1393 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1394 al=SSL3_AD_UNEXPECTED_MESSAGE;
1398 if (!(type & EVP_PKT_SIGN))
1400 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1401 al=SSL3_AD_ILLEGAL_PARAMETER;
1405 if (s->s3->change_cipher_spec)
1407 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1408 al=SSL3_AD_UNEXPECTED_MESSAGE;
1412 /* we now have a signature that we need to verify */
1413 p=(unsigned char *)s->init_buf->data;
1418 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1419 al=SSL3_AD_ILLEGAL_PARAMETER;
1423 j=EVP_PKEY_size(pkey);
1424 if ((i > j) || (n > j) || (n <= 0))
1426 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1427 al=SSL3_AD_ILLEGAL_PARAMETER;
1432 if (pkey->type == EVP_PKEY_RSA)
1434 i=RSA_public_decrypt(i,p,p,pkey->pkey.rsa,RSA_PKCS1_PADDING);
1437 al=SSL3_AD_ILLEGAL_PARAMETER;
1438 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1441 if ((i != (MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH)) ||
1442 memcmp(&(s->s3->tmp.finish_md1[0]),
1443 p,MD5_DIGEST_LENGTH) ||
1444 memcmp(&(s->s3->tmp.finish_md2[0]),
1445 &(p[MD5_DIGEST_LENGTH]),SHA_DIGEST_LENGTH))
1447 al=SSL3_AD_ILLEGAL_PARAMETER;
1448 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1455 if (pkey->type == EVP_PKEY_DSA)
1457 j=DSA_verify(pkey->save_type,s->s3->tmp.finish_md2,
1458 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1462 al=SSL3_AD_ILLEGAL_PARAMETER;
1463 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1470 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1471 al=SSL3_AD_UNSUPPORTED_CERTIFICATE;
1480 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1486 static int ssl3_get_client_certificate(s)
1489 int i,ok,al,ret= -1;
1491 unsigned long l,nc,llen,n;
1492 unsigned char *p,*d,*q;
1495 n=ssl3_get_message(s,
1499 #if defined(MSDOS) && !defined(WIN32)
1500 1024*30, /* 30k max cert list :-) */
1502 1024*100, /* 100k max cert list :-) */
1506 if (!ok) return((int)n);
1508 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1510 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1511 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1513 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1514 al=SSL3_AD_NO_CERTIFICATE;
1517 s->s3->tmp.reuse_message=1;
1521 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1523 al=SSL3_AD_UNEXPECTED_MESSAGE;
1524 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1527 d=p=(unsigned char *)s->init_buf->data;
1529 if ((sk=sk_new_null()) == NULL)
1531 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1538 al=SSL3_AD_ILLEGAL_PARAMETER;
1539 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1542 for (nc=0; nc<llen; )
1545 if ((l+nc+3) > llen)
1547 al=SSL3_AD_ILLEGAL_PARAMETER;
1548 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1553 x=d2i_X509(NULL,&p,l);
1556 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1561 al=SSL3_AD_ILLEGAL_PARAMETER;
1562 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1565 if (!sk_push(sk,(char *)x))
1567 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1574 if (sk_num(sk) <= 0)
1576 al=SSL3_AD_ILLEGAL_PARAMETER;
1577 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_PASSED);
1580 i=ssl_verify_cert_chain(s,sk);
1583 al=ssl_verify_alarm_type(s->verify_result);
1584 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1588 /* This should not be needed */
1589 if (s->session->peer != NULL)
1590 X509_free(s->session->peer);
1592 s->session->peer=(X509 *)sk_shift(sk);
1598 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1601 if (x != NULL) X509_free(x);
1602 if (sk != NULL) sk_pop_free(sk,X509_free);
1606 int ssl3_send_server_certificate(s)
1612 if (s->state == SSL3_ST_SW_CERT_A)
1614 x=ssl_get_server_send_cert(s);
1617 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1621 l=ssl3_output_cert_chain(s,x);
1622 s->state=SSL3_ST_SW_CERT_B;
1627 /* SSL3_ST_SW_CERT_B */
1628 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));