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
60 #define NETSCAPE_HANG_BUG
64 #include <openssl/buffer.h>
65 #include <openssl/rand.h>
66 #include <openssl/objects.h>
67 #include <openssl/evp.h>
68 #include <openssl/x509.h>
71 #ifndef OPENSSL_NO_KRB5
73 #endif /* OPENSSL_NO_KRB5 */
75 static SSL_METHOD *ssl3_get_server_method(int ver);
76 static int ssl3_get_client_hello(SSL *s);
77 static int ssl3_check_client_hello(SSL *s);
78 static int ssl3_send_server_hello(SSL *s);
79 static int ssl3_send_server_key_exchange(SSL *s);
80 static int ssl3_send_certificate_request(SSL *s);
81 static int ssl3_send_server_done(SSL *s);
82 static int ssl3_get_client_key_exchange(SSL *s);
83 static int ssl3_get_client_certificate(SSL *s);
84 static int ssl3_get_cert_verify(SSL *s);
85 static int ssl3_send_hello_request(SSL *s);
87 static SSL_METHOD *ssl3_get_server_method(int ver)
89 if (ver == SSL3_VERSION)
90 return(SSLv3_server_method());
95 SSL_METHOD *SSLv3_server_method(void)
98 static SSL_METHOD SSLv3_server_data;
102 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
104 SSLv3_server_data.ssl_accept=ssl3_accept;
105 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
108 return(&SSLv3_server_data);
111 int ssl3_accept(SSL *s)
114 unsigned long l,Time=time(NULL);
118 int new_state,state,skip=0;
120 RAND_add(&Time,sizeof(Time),0);
124 if (s->info_callback != NULL)
126 else if (s->ctx->info_callback != NULL)
127 cb=s->ctx->info_callback;
129 /* init things to blank */
130 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
135 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
145 case SSL_ST_RENEGOTIATE:
147 /* s->state=SSL_ST_ACCEPT; */
151 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
152 case SSL_ST_OK|SSL_ST_ACCEPT:
155 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
157 if ((s->version>>8) != 3)
159 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
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 ssl3_init_finished_mac(s);
195 s->state=SSL3_ST_SR_CLNT_HELLO_A;
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;
265 /* clear this, it may get reset by
266 * send_server_key_exchange */
267 if ((s->options & SSL_OP_EPHEMERAL_RSA)
268 #ifndef OPENSSL_NO_KRB5
270 #endif /* OPENSSL_NO_KRB5 */
272 s->s3->tmp.use_rsa_tmp=1;
274 s->s3->tmp.use_rsa_tmp=0;
276 /* only send if a DH key exchange, fortezza or
277 * RSA but we have a sign only certificate */
278 if (s->s3->tmp.use_rsa_tmp
279 || (l & (SSL_DH|SSL_kFZA))
281 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
282 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
283 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
289 ret=ssl3_send_server_key_exchange(s);
290 if (ret <= 0) goto end;
295 s->state=SSL3_ST_SW_CERT_REQ_A;
299 case SSL3_ST_SW_CERT_REQ_A:
300 case SSL3_ST_SW_CERT_REQ_B:
301 if (/* don't request cert unless asked for it: */
302 !(s->verify_mode & SSL_VERIFY_PEER) ||
303 /* if SSL_VERIFY_CLIENT_ONCE is set,
304 * don't request cert during re-negotiation: */
305 ((s->session->peer != NULL) &&
306 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
307 /* never request cert in anonymous ciphersuites
308 * (see section "Certificate request" in SSL 3 drafts
309 * and in RFC 2246): */
310 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
311 /* ... except when the application insists on verification
312 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
313 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)))
315 /* no cert request */
317 s->s3->tmp.cert_request=0;
318 s->state=SSL3_ST_SW_SRVR_DONE_A;
322 s->s3->tmp.cert_request=1;
323 ret=ssl3_send_certificate_request(s);
324 if (ret <= 0) goto end;
325 #ifndef NETSCAPE_HANG_BUG
326 s->state=SSL3_ST_SW_SRVR_DONE_A;
328 s->state=SSL3_ST_SW_FLUSH;
329 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
335 case SSL3_ST_SW_SRVR_DONE_A:
336 case SSL3_ST_SW_SRVR_DONE_B:
337 ret=ssl3_send_server_done(s);
338 if (ret <= 0) goto end;
339 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
340 s->state=SSL3_ST_SW_FLUSH;
344 case SSL3_ST_SW_FLUSH:
345 /* number of bytes to be flushed */
346 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
349 s->rwstate=SSL_WRITING;
350 num1=BIO_flush(s->wbio);
351 if (num1 <= 0) { ret= -1; goto end; }
352 s->rwstate=SSL_NOTHING;
355 s->state=s->s3->tmp.next_state;
358 case SSL3_ST_SR_CERT_A:
359 case SSL3_ST_SR_CERT_B:
360 /* Check for second client hello (MS SGC) */
361 ret = ssl3_check_client_hello(s);
365 s->state = SSL3_ST_SR_CLNT_HELLO_C;
367 /* could be sent for a DH cert, even if we
368 * have not asked for it :-) */
369 ret=ssl3_get_client_certificate(s);
370 if (ret <= 0) goto end;
372 s->state=SSL3_ST_SR_KEY_EXCH_A;
376 case SSL3_ST_SR_KEY_EXCH_A:
377 case SSL3_ST_SR_KEY_EXCH_B:
378 ret=ssl3_get_client_key_exchange(s);
379 if (ret <= 0) goto end;
380 s->state=SSL3_ST_SR_CERT_VRFY_A;
383 /* We need to get hashes here so if there is
384 * a client cert, it can be verified */
385 s->method->ssl3_enc->cert_verify_mac(s,
386 &(s->s3->finish_dgst1),
387 &(s->s3->tmp.cert_verify_md[0]));
388 s->method->ssl3_enc->cert_verify_mac(s,
389 &(s->s3->finish_dgst2),
390 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
394 case SSL3_ST_SR_CERT_VRFY_A:
395 case SSL3_ST_SR_CERT_VRFY_B:
397 /* we should decide if we expected this one */
398 ret=ssl3_get_cert_verify(s);
399 if (ret <= 0) goto end;
401 s->state=SSL3_ST_SR_FINISHED_A;
405 case SSL3_ST_SR_FINISHED_A:
406 case SSL3_ST_SR_FINISHED_B:
407 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
408 SSL3_ST_SR_FINISHED_B);
409 if (ret <= 0) goto end;
413 s->state=SSL3_ST_SW_CHANGE_A;
417 case SSL3_ST_SW_CHANGE_A:
418 case SSL3_ST_SW_CHANGE_B:
420 s->session->cipher=s->s3->tmp.new_cipher;
421 if (!s->method->ssl3_enc->setup_key_block(s))
422 { ret= -1; goto end; }
424 ret=ssl3_send_change_cipher_spec(s,
425 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
427 if (ret <= 0) goto end;
428 s->state=SSL3_ST_SW_FINISHED_A;
431 if (!s->method->ssl3_enc->change_cipher_state(s,
432 SSL3_CHANGE_CIPHER_SERVER_WRITE))
440 case SSL3_ST_SW_FINISHED_A:
441 case SSL3_ST_SW_FINISHED_B:
442 ret=ssl3_send_finished(s,
443 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
444 s->method->ssl3_enc->server_finished_label,
445 s->method->ssl3_enc->server_finished_label_len);
446 if (ret <= 0) goto end;
447 s->state=SSL3_ST_SW_FLUSH;
449 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
451 s->s3->tmp.next_state=SSL_ST_OK;
456 /* clean a few things up */
457 ssl3_cleanup_key_block(s);
459 BUF_MEM_free(s->init_buf);
462 /* remove buffering on output */
463 ssl_free_wbio_buffer(s);
468 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
470 s->ctx->stats.sess_accept_good++;
472 s->handshake_func=ssl3_accept;
475 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
481 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
487 if (!s->s3->tmp.reuse_message && !skip)
491 if ((ret=BIO_flush(s->wbio)) <= 0)
496 if ((cb != NULL) && (s->state != state))
500 cb(s,SSL_CB_ACCEPT_LOOP,1);
507 /* BIO_flush(s->wbio); */
510 cb(s,SSL_CB_ACCEPT_EXIT,ret);
515 static int ssl3_send_hello_request(SSL *s)
519 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
521 p=(unsigned char *)s->init_buf->data;
522 *(p++)=SSL3_MT_HELLO_REQUEST;
527 s->state=SSL3_ST_SW_HELLO_REQ_B;
528 /* number of bytes to write */
533 /* SSL3_ST_SW_HELLO_REQ_B */
534 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
537 static int ssl3_check_client_hello(SSL *s)
542 n=ssl3_get_message(s,
546 SSL3_RT_MAX_PLAIN_LENGTH,
548 if (!ok) return((int)n);
549 s->s3->tmp.reuse_message = 1;
550 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
552 /* Throw away what we have done so far in the current handshake,
553 * which will now be aborted. (A full SSL_clear would be too much.)
554 * I hope that tmp.dh is the only thing that may need to be cleared
555 * when a handshake is not completed ... */
556 #ifndef OPENSSL_NO_DH
557 if (s->s3->tmp.dh != NULL)
559 DH_free(s->s3->tmp.dh);
560 s->s3->tmp.dh = NULL;
568 static int ssl3_get_client_hello(SSL *s)
570 int i,j,ok,al,ret= -1;
573 unsigned char *p,*d,*q;
576 STACK_OF(SSL_CIPHER) *ciphers=NULL;
578 /* We do this so that we will respond with our native type.
579 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
580 * This down switching should be handled by a different method.
581 * If we are SSLv3, we will respond with SSLv3, even if prompted with
584 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
587 s->state=SSL3_ST_SR_CLNT_HELLO_B;
589 n=ssl3_get_message(s,
590 SSL3_ST_SR_CLNT_HELLO_B,
591 SSL3_ST_SR_CLNT_HELLO_C,
592 SSL3_MT_CLIENT_HELLO,
593 SSL3_RT_MAX_PLAIN_LENGTH,
596 if (!ok) return((int)n);
597 d=p=(unsigned char *)s->init_buf->data;
599 /* use version from inside client hello, not from record header
600 * (may differ: see RFC 2246, Appendix E, second paragraph) */
601 s->client_version=(((int)p[0])<<8)|(int)p[1];
604 /* load the client random */
605 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
608 /* get the session-id */
614 if (!ssl_get_new_session(s,1))
619 i=ssl_get_prev_session(s,p,j);
621 { /* previous session */
628 if (!ssl_get_new_session(s,1))
635 if ((i == 0) && (j != 0))
637 /* we need a cipher if we are not resuming a session */
638 al=SSL_AD_ILLEGAL_PARAMETER;
639 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
644 /* not enough data */
645 al=SSL_AD_DECODE_ERROR;
646 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
649 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
656 /* If it is a hit, check that the cipher is in the list */
657 if ((s->hit) && (i > 0))
660 id=s->session->cipher->id;
663 printf("client sent %d ciphers\n",sk_num(ciphers));
665 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
667 c=sk_SSL_CIPHER_value(ciphers,i);
669 printf("client [%2d of %2d]:%s\n",
670 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
680 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
682 /* Very bad for multi-threading.... */
683 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
688 /* we need to have the cipher in the cipher
689 * list if we are asked to reuse it */
690 al=SSL_AD_ILLEGAL_PARAMETER;
691 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
702 if (p[j] == 0) break;
709 al=SSL_AD_DECODE_ERROR;
710 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
714 /* Worst case, we will use the NULL compression, but if we have other
715 * options, we will now look for them. We have i-1 compression
716 * algorithms from the client, starting at q. */
717 s->s3->tmp.new_compression=NULL;
718 if (s->ctx->comp_methods != NULL)
719 { /* See if we have a match */
722 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
725 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
738 s->s3->tmp.new_compression=comp;
743 /* TLS does not mind if there is extra stuff */
744 if (s->version == SSL3_VERSION)
748 /* wrong number of bytes,
749 * there could be more to follow */
750 al=SSL_AD_DECODE_ERROR;
751 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
756 /* Given s->session->ciphers and SSL_get_ciphers, we must
761 s->session->compress_meth=(comp == NULL)?0:comp->id;
762 if (s->session->ciphers != NULL)
763 sk_SSL_CIPHER_free(s->session->ciphers);
764 s->session->ciphers=ciphers;
767 al=SSL_AD_ILLEGAL_PARAMETER;
768 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
772 c=ssl3_choose_cipher(s,s->session->ciphers,
777 al=SSL_AD_HANDSHAKE_FAILURE;
778 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
781 s->s3->tmp.new_cipher=c;
785 /* Session-id reuse */
786 #ifdef REUSE_CIPHER_BUG
787 STACK_OF(SSL_CIPHER) *sk;
791 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
793 sk=s->session->ciphers;
794 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
796 c=sk_SSL_CIPHER_value(sk,i);
797 if (c->algorithms & SSL_eNULL)
799 if (SSL_C_IS_EXPORT(c))
803 s->s3->tmp.new_cipher=nc;
805 s->s3->tmp.new_cipher=ec;
807 s->s3->tmp.new_cipher=s->session->cipher;
811 s->s3->tmp.new_cipher=s->session->cipher;
814 /* we now have the following setup.
816 * cipher_list - our prefered list of ciphers
817 * ciphers - the clients prefered list of ciphers
818 * compression - basically ignored right now
819 * ssl version is set - sslv3
820 * s->session - The ssl session has been setup.
821 * s->hit - session reuse flag
822 * s->tmp.new_cipher - the new cipher to use.
829 ssl3_send_alert(s,SSL3_AL_FATAL,al);
832 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
836 static int ssl3_send_server_hello(SSL *s)
841 unsigned long l,Time;
843 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
845 buf=(unsigned char *)s->init_buf->data;
846 p=s->s3->server_random;
847 Time=time(NULL); /* Time */
849 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
850 /* Do the message type and length last */
853 *(p++)=s->version>>8;
854 *(p++)=s->version&0xff;
857 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
860 /* now in theory we have 3 options to sending back the
861 * session id. If it is a re-use, we send back the
862 * old session-id, if it is a new session, we send
863 * back the new session-id or we send back a 0 length
864 * session-id if we want it to be single use.
865 * Currently I will not implement the '0' length session-id
866 * 12-Jan-98 - I'll now support the '0' length stuff.
868 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
869 s->session->session_id_length=0;
871 sl=s->session->session_id_length;
873 memcpy(p,s->session->session_id,sl);
877 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
880 /* put the compression method */
881 if (s->s3->tmp.new_compression == NULL)
884 *(p++)=s->s3->tmp.new_compression->id;
889 *(d++)=SSL3_MT_SERVER_HELLO;
892 s->state=SSL3_ST_CW_CLNT_HELLO_B;
893 /* number of bytes to write */
898 /* SSL3_ST_CW_CLNT_HELLO_B */
899 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
902 static int ssl3_send_server_done(SSL *s)
906 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
908 p=(unsigned char *)s->init_buf->data;
911 *(p++)=SSL3_MT_SERVER_DONE;
916 s->state=SSL3_ST_SW_SRVR_DONE_B;
917 /* number of bytes to write */
922 /* SSL3_ST_CW_CLNT_HELLO_B */
923 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
926 static int ssl3_send_server_key_exchange(SSL *s)
928 #ifndef OPENSSL_NO_RSA
932 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
935 #ifndef OPENSSL_NO_DH
949 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
951 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
956 r[0]=r[1]=r[2]=r[3]=NULL;
958 #ifndef OPENSSL_NO_RSA
962 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
964 rsa=s->cert->rsa_tmp_cb(s,
965 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
966 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
969 al=SSL_AD_HANDSHAKE_FAILURE;
970 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
973 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
978 al=SSL_AD_HANDSHAKE_FAILURE;
979 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
984 s->s3->tmp.use_rsa_tmp=1;
988 #ifndef OPENSSL_NO_DH
992 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
993 dhp=s->cert->dh_tmp_cb(s,
994 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
995 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
998 al=SSL_AD_HANDSHAKE_FAILURE;
999 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1003 if (s->s3->tmp.dh != NULL)
1006 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1010 if ((dh=DHparams_dup(dhp)) == NULL)
1012 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1017 if ((dhp->pub_key == NULL ||
1018 dhp->priv_key == NULL ||
1019 (s->options & SSL_OP_SINGLE_DH_USE)))
1021 if(!DH_generate_key(dh))
1023 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1030 dh->pub_key=BN_dup(dhp->pub_key);
1031 dh->priv_key=BN_dup(dhp->priv_key);
1032 if ((dh->pub_key == NULL) ||
1033 (dh->priv_key == NULL))
1035 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1046 al=SSL_AD_HANDSHAKE_FAILURE;
1047 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1050 for (i=0; r[i] != NULL; i++)
1052 nr[i]=BN_num_bytes(r[i]);
1056 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1058 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1061 al=SSL_AD_DECODE_ERROR;
1064 kn=EVP_PKEY_size(pkey);
1072 if (!BUF_MEM_grow(buf,n+4+kn))
1074 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1077 d=(unsigned char *)s->init_buf->data;
1080 for (i=0; r[i] != NULL; i++)
1090 /* n is the length of the params, they start at &(d[4])
1091 * and p points to the space at the end. */
1092 #ifndef OPENSSL_NO_RSA
1093 if (pkey->type == EVP_PKEY_RSA)
1097 for (num=2; num > 0; num--)
1099 EVP_DigestInit(&md_ctx,(num == 2)
1100 ?s->ctx->md5:s->ctx->sha1);
1101 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1102 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1103 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1104 EVP_DigestFinal(&md_ctx,q,
1105 (unsigned int *)&i);
1109 if (RSA_sign(NID_md5_sha1, md_buf, j,
1110 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1112 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1120 #if !defined(OPENSSL_NO_DSA)
1121 if (pkey->type == EVP_PKEY_DSA)
1124 EVP_SignInit(&md_ctx,EVP_dss1());
1125 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1126 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1127 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1128 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1129 (unsigned int *)&i,pkey))
1131 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1140 /* Is this error check actually needed? */
1141 al=SSL_AD_HANDSHAKE_FAILURE;
1142 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1147 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1150 /* we should now have things packed up, so lets send
1156 s->state = SSL3_ST_SW_KEY_EXCH_B;
1157 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1159 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1164 static int ssl3_send_certificate_request(SSL *s)
1166 unsigned char *p,*d;
1168 STACK_OF(X509_NAME) *sk=NULL;
1172 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1176 d=p=(unsigned char *)&(buf->data[4]);
1178 /* get the list of acceptable cert types */
1180 n=ssl3_get_req_cert_type(s,p);
1189 sk=SSL_get_client_CA_list(s);
1193 for (i=0; i<sk_X509_NAME_num(sk); i++)
1195 name=sk_X509_NAME_value(sk,i);
1196 j=i2d_X509_NAME(name,NULL);
1197 if (!BUF_MEM_grow(buf,4+n+j+2))
1199 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1202 p=(unsigned char *)&(buf->data[4+n]);
1203 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1206 i2d_X509_NAME(name,&p);
1213 i2d_X509_NAME(name,&p);
1214 j-=2; s2n(j,d); j+=2;
1220 /* else no CA names */
1221 p=(unsigned char *)&(buf->data[4+off]);
1224 d=(unsigned char *)buf->data;
1225 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1228 /* we should now have things packed up, so lets send
1233 #ifdef NETSCAPE_HANG_BUG
1234 p=(unsigned char *)s->init_buf->data + s->init_num;
1237 *(p++)=SSL3_MT_SERVER_DONE;
1246 /* SSL3_ST_SW_CERT_REQ_B */
1247 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1252 static int ssl3_get_client_key_exchange(SSL *s)
1258 #ifndef OPENSSL_NO_RSA
1260 EVP_PKEY *pkey=NULL;
1262 #ifndef OPENSSL_NO_DH
1266 #ifndef OPENSSL_NO_KRB5
1268 #endif /* OPENSSL_NO_KRB5 */
1270 n=ssl3_get_message(s,
1271 SSL3_ST_SR_KEY_EXCH_A,
1272 SSL3_ST_SR_KEY_EXCH_B,
1273 SSL3_MT_CLIENT_KEY_EXCHANGE,
1277 if (!ok) return((int)n);
1278 p=(unsigned char *)s->init_buf->data;
1280 l=s->s3->tmp.new_cipher->algorithms;
1282 #ifndef OPENSSL_NO_RSA
1285 /* FIX THIS UP EAY EAY EAY EAY */
1286 if (s->s3->tmp.use_rsa_tmp)
1288 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1289 rsa=s->cert->rsa_tmp;
1290 /* Don't do a callback because rsa_tmp should
1291 * be sent already */
1294 al=SSL_AD_HANDSHAKE_FAILURE;
1295 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1302 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1303 if ( (pkey == NULL) ||
1304 (pkey->type != EVP_PKEY_RSA) ||
1305 (pkey->pkey.rsa == NULL))
1307 al=SSL_AD_HANDSHAKE_FAILURE;
1308 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1315 if (s->version > SSL3_VERSION)
1320 if (!(s->options & SSL_OP_TLS_D5_BUG))
1322 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1332 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1336 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1338 al=SSL_AD_DECODE_ERROR;
1339 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1342 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1344 /* The premaster secret must contain the same version number as the
1345 * ClientHello to detect version rollback attacks (strangely, the
1346 * protocol does not offer such protection for DH ciphersuites).
1347 * However, buggy clients exist that send the negotiated protocol
1348 * version instead if the server does not support the requested
1350 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1351 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1352 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1354 al=SSL_AD_DECODE_ERROR;
1355 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1365 /* Some decryption failure -- use random value instead as countermeasure
1366 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1367 * (see RFC 2246, section 7.4.7.1).
1368 * But note that due to length and protocol version checking, the
1369 * attack is impractical anyway (see section 5 in D. Bleichenbacher:
1370 * "Chosen Ciphertext Attacks Against Protocols Based on the RSA
1371 * Encryption Standard PKCS #1", CRYPTO '98, LNCS 1462, pp. 1-12).
1374 i = SSL_MAX_MASTER_KEY_LENGTH;
1375 p[0] = s->client_version >> 8;
1376 p[1] = s->client_version & 0xff;
1377 RAND_pseudo_bytes(p+2, i-2); /* should be RAND_bytes, but we cannot work around a failure */
1381 s->session->master_key_length=
1382 s->method->ssl3_enc->generate_master_secret(s,
1383 s->session->master_key,
1389 #ifndef OPENSSL_NO_DH
1390 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1395 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1397 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1407 if (n == 0L) /* the parameters are in the cert */
1409 al=SSL_AD_HANDSHAKE_FAILURE;
1410 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1415 if (s->s3->tmp.dh == NULL)
1417 al=SSL_AD_HANDSHAKE_FAILURE;
1418 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1422 dh_srvr=s->s3->tmp.dh;
1425 pub=BN_bin2bn(p,i,NULL);
1428 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1432 i=DH_compute_key(p,pub,dh_srvr);
1436 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1440 DH_free(s->s3->tmp.dh);
1445 s->session->master_key_length=
1446 s->method->ssl3_enc->generate_master_secret(s,
1447 s->session->master_key,p,i);
1452 #ifndef OPENSSL_NO_KRB5
1455 krb5_error_code krb5rc;
1456 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1458 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1459 if ((krb5rc = kssl_sget_tkt(kssl_ctx,
1460 s->init_buf->data, s->init_buf->length,
1464 printf("kssl_sget_tkt rtn %d [%d]\n",
1465 krb5rc, kssl_err.reason);
1467 printf("kssl_err text= %s\n", kssl_err.text);
1468 #endif /* KSSL_DEBUG */
1469 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1475 kssl_ctx_show(kssl_ctx);
1476 #endif /* KSSL_DEBUG */
1478 /* 19991013 VRS - 3DES is kind of bogus here,
1479 ** at least until Kerberos supports 3DES. The only
1480 ** real secret is the 8-byte Kerberos session key;
1481 ** the other key material (client_random, server_random)
1482 ** could be sniffed. Nonces may help against replays though.
1484 ** Alternate code for Kerberos Purists:
1486 ** memcpy(s->session->master_key, kssl_ctx->key, kssl_ctx->length);
1487 ** s->session->master_key_length = kssl_ctx->length;
1489 s->session->master_key_length=
1490 s->method->ssl3_enc->generate_master_secret(s,
1491 s->session->master_key, kssl_ctx->key, kssl_ctx->length);
1492 /* Was doing kssl_ctx_free() here, but it caused problems for apache.
1493 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
1494 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
1498 #endif /* OPENSSL_NO_KRB5 */
1500 al=SSL_AD_HANDSHAKE_FAILURE;
1501 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1507 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1508 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA)
1514 static int ssl3_get_cert_verify(SSL *s)
1516 EVP_PKEY *pkey=NULL;
1523 n=ssl3_get_message(s,
1524 SSL3_ST_SR_CERT_VRFY_A,
1525 SSL3_ST_SR_CERT_VRFY_B,
1530 if (!ok) return((int)n);
1532 if (s->session->peer != NULL)
1534 peer=s->session->peer;
1535 pkey=X509_get_pubkey(peer);
1536 type=X509_certificate_type(peer,pkey);
1544 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1546 s->s3->tmp.reuse_message=1;
1547 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1549 al=SSL_AD_UNEXPECTED_MESSAGE;
1550 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1559 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1560 al=SSL_AD_UNEXPECTED_MESSAGE;
1564 if (!(type & EVP_PKT_SIGN))
1566 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1567 al=SSL_AD_ILLEGAL_PARAMETER;
1571 if (s->s3->change_cipher_spec)
1573 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1574 al=SSL_AD_UNEXPECTED_MESSAGE;
1578 /* we now have a signature that we need to verify */
1579 p=(unsigned char *)s->init_buf->data;
1584 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1585 al=SSL_AD_DECODE_ERROR;
1589 j=EVP_PKEY_size(pkey);
1590 if ((i > j) || (n > j) || (n <= 0))
1592 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1593 al=SSL_AD_DECODE_ERROR;
1597 #ifndef OPENSSL_NO_RSA
1598 if (pkey->type == EVP_PKEY_RSA)
1600 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1601 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1605 al=SSL_AD_DECRYPT_ERROR;
1606 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1611 al=SSL_AD_DECRYPT_ERROR;
1612 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1618 #ifndef OPENSSL_NO_DSA
1619 if (pkey->type == EVP_PKEY_DSA)
1621 j=DSA_verify(pkey->save_type,
1622 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1623 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1627 al=SSL_AD_DECRYPT_ERROR;
1628 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1635 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
1636 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1645 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1648 EVP_PKEY_free(pkey);
1652 static int ssl3_get_client_certificate(SSL *s)
1654 int i,ok,al,ret= -1;
1656 unsigned long l,nc,llen,n;
1657 unsigned char *p,*d,*q;
1658 STACK_OF(X509) *sk=NULL;
1660 n=ssl3_get_message(s,
1664 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
1665 1024*30, /* 30k max cert list :-) */
1667 1024*100, /* 100k max cert list :-) */
1671 if (!ok) return((int)n);
1673 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1675 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1676 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1678 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1679 al=SSL_AD_HANDSHAKE_FAILURE;
1682 /* If tls asked for a client cert, the client must return a 0 list */
1683 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1685 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1686 al=SSL_AD_UNEXPECTED_MESSAGE;
1689 s->s3->tmp.reuse_message=1;
1693 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1695 al=SSL_AD_UNEXPECTED_MESSAGE;
1696 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1699 d=p=(unsigned char *)s->init_buf->data;
1701 if ((sk=sk_X509_new_null()) == NULL)
1703 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1710 al=SSL_AD_DECODE_ERROR;
1711 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1714 for (nc=0; nc<llen; )
1717 if ((l+nc+3) > llen)
1719 al=SSL_AD_DECODE_ERROR;
1720 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1725 x=d2i_X509(NULL,&p,l);
1728 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1733 al=SSL_AD_DECODE_ERROR;
1734 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1737 if (!sk_X509_push(sk,x))
1739 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1746 if (sk_X509_num(sk) <= 0)
1748 /* TLS does not mind 0 certs returned */
1749 if (s->version == SSL3_VERSION)
1751 al=SSL_AD_HANDSHAKE_FAILURE;
1752 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1755 /* Fail for TLS only if we required a certificate */
1756 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1757 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1759 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1760 al=SSL_AD_HANDSHAKE_FAILURE;
1766 i=ssl_verify_cert_chain(s,sk);
1769 al=ssl_verify_alarm_type(s->verify_result);
1770 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1775 if (s->session->peer != NULL) /* This should not be needed */
1776 X509_free(s->session->peer);
1777 s->session->peer=sk_X509_shift(sk);
1778 s->session->verify_result = s->verify_result;
1780 /* With the current implementation, sess_cert will always be NULL
1781 * when we arrive here. */
1782 if (s->session->sess_cert == NULL)
1784 s->session->sess_cert = ssl_sess_cert_new();
1785 if (s->session->sess_cert == NULL)
1787 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1791 if (s->session->sess_cert->cert_chain != NULL)
1792 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1793 s->session->sess_cert->cert_chain=sk;
1794 /* Inconsistency alert: cert_chain does *not* include the
1795 * peer's own certificate, while we do include it in s3_clnt.c */
1803 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1806 if (x != NULL) X509_free(x);
1807 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1811 int ssl3_send_server_certificate(SSL *s)
1816 if (s->state == SSL3_ST_SW_CERT_A)
1818 x=ssl_get_server_send_cert(s);
1820 /* VRS: allow null cert if auth == KRB5 */
1821 (s->s3->tmp.new_cipher->algorithms
1822 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
1823 != (SSL_aKRB5|SSL_kKRB5))
1825 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
1829 l=ssl3_output_cert_chain(s,x);
1830 s->state=SSL3_ST_SW_CERT_B;
1835 /* SSL3_ST_SW_CERT_B */
1836 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));