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>
69 #include <openssl/krb5_asn.h>
71 #ifndef OPENSSL_NO_KRB5
73 #endif /* OPENSSL_NO_KRB5 */
74 #include <openssl/md5.h>
76 static SSL_METHOD *ssl3_get_server_method(int ver);
77 static int ssl3_get_client_hello(SSL *s);
78 static int ssl3_check_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_client_key_exchange(SSL *s);
84 static int ssl3_get_client_certificate(SSL *s);
85 static int ssl3_get_cert_verify(SSL *s);
86 static int ssl3_send_hello_request(SSL *s);
88 static SSL_METHOD *ssl3_get_server_method(int ver)
90 if (ver == SSL3_VERSION)
91 return(SSLv3_server_method());
96 SSL_METHOD *SSLv3_server_method(void)
99 static SSL_METHOD SSLv3_server_data;
103 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
105 SSLv3_server_data.ssl_accept=ssl3_accept;
106 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
109 return(&SSLv3_server_data);
112 int ssl3_accept(SSL *s)
115 unsigned long l,Time=time(NULL);
119 int new_state,state,skip=0;
121 RAND_add(&Time,sizeof(Time),0);
125 if (s->info_callback != NULL)
127 else if (s->ctx->info_callback != NULL)
128 cb=s->ctx->info_callback;
130 /* init things to blank */
131 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
136 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
146 case SSL_ST_RENEGOTIATE:
148 /* s->state=SSL_ST_ACCEPT; */
152 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
153 case SSL_ST_OK|SSL_ST_ACCEPT:
156 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
158 if ((s->version>>8) != 3)
160 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
163 s->type=SSL_ST_ACCEPT;
165 if (s->init_buf == NULL)
167 if ((buf=BUF_MEM_new()) == NULL)
172 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
180 if (!ssl3_setup_buffers(s))
186 /* Ok, we now need to push on a buffering BIO so that
187 * the output is sent in a way that TCP likes :-)
189 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
193 if (s->state != SSL_ST_RENEGOTIATE)
195 ssl3_init_finished_mac(s);
196 s->state=SSL3_ST_SR_CLNT_HELLO_A;
197 s->ctx->stats.sess_accept++;
201 s->ctx->stats.sess_accept_renegotiate++;
202 s->state=SSL3_ST_SW_HELLO_REQ_A;
206 case SSL3_ST_SW_HELLO_REQ_A:
207 case SSL3_ST_SW_HELLO_REQ_B:
210 ret=ssl3_send_hello_request(s);
211 if (ret <= 0) goto end;
212 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
213 s->state=SSL3_ST_SW_FLUSH;
216 ssl3_init_finished_mac(s);
219 case SSL3_ST_SW_HELLO_REQ_C:
225 case SSL3_ST_SR_CLNT_HELLO_A:
226 case SSL3_ST_SR_CLNT_HELLO_B:
227 case SSL3_ST_SR_CLNT_HELLO_C:
230 ret=ssl3_get_client_hello(s);
231 if (ret <= 0) goto end;
232 s->state=SSL3_ST_SW_SRVR_HELLO_A;
236 case SSL3_ST_SW_SRVR_HELLO_A:
237 case SSL3_ST_SW_SRVR_HELLO_B:
238 ret=ssl3_send_server_hello(s);
239 if (ret <= 0) goto end;
242 s->state=SSL3_ST_SW_CHANGE_A;
244 s->state=SSL3_ST_SW_CERT_A;
248 case SSL3_ST_SW_CERT_A:
249 case SSL3_ST_SW_CERT_B:
250 /* Check if it is anon DH */
251 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
253 ret=ssl3_send_server_certificate(s);
254 if (ret <= 0) goto end;
258 s->state=SSL3_ST_SW_KEY_EXCH_A;
262 case SSL3_ST_SW_KEY_EXCH_A:
263 case SSL3_ST_SW_KEY_EXCH_B:
264 l=s->s3->tmp.new_cipher->algorithms;
266 /* clear this, it may get reset by
267 * send_server_key_exchange */
268 if ((s->options & SSL_OP_EPHEMERAL_RSA)
269 #ifndef OPENSSL_NO_KRB5
271 #endif /* OPENSSL_NO_KRB5 */
273 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
274 * even when forbidden by protocol specs
275 * (handshake may fail as clients are not required to
276 * be able to handle this) */
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 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
287 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
288 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
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 (/* don't request cert unless asked for it: */
307 !(s->verify_mode & SSL_VERIFY_PEER) ||
308 /* if SSL_VERIFY_CLIENT_ONCE is set,
309 * don't request cert during re-negotiation: */
310 ((s->session->peer != NULL) &&
311 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
312 /* never request cert in anonymous ciphersuites
313 * (see section "Certificate request" in SSL 3 drafts
314 * and in RFC 2246): */
315 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
316 /* ... except when the application insists on verification
317 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
318 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
319 /* never request cert in Kerberos ciphersuites */
320 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
322 /* no cert request */
324 s->s3->tmp.cert_request=0;
325 s->state=SSL3_ST_SW_SRVR_DONE_A;
329 s->s3->tmp.cert_request=1;
330 ret=ssl3_send_certificate_request(s);
331 if (ret <= 0) goto end;
332 #ifndef NETSCAPE_HANG_BUG
333 s->state=SSL3_ST_SW_SRVR_DONE_A;
335 s->state=SSL3_ST_SW_FLUSH;
336 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
342 case SSL3_ST_SW_SRVR_DONE_A:
343 case SSL3_ST_SW_SRVR_DONE_B:
344 ret=ssl3_send_server_done(s);
345 if (ret <= 0) goto end;
346 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
347 s->state=SSL3_ST_SW_FLUSH;
351 case SSL3_ST_SW_FLUSH:
352 /* number of bytes to be flushed */
353 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
356 s->rwstate=SSL_WRITING;
357 num1=BIO_flush(s->wbio);
358 if (num1 <= 0) { ret= -1; goto end; }
359 s->rwstate=SSL_NOTHING;
362 s->state=s->s3->tmp.next_state;
365 case SSL3_ST_SR_CERT_A:
366 case SSL3_ST_SR_CERT_B:
367 /* Check for second client hello (MS SGC) */
368 ret = ssl3_check_client_hello(s);
372 s->state = SSL3_ST_SR_CLNT_HELLO_C;
374 /* could be sent for a DH cert, even if we
375 * have not asked for it :-) */
376 ret=ssl3_get_client_certificate(s);
377 if (ret <= 0) goto end;
379 s->state=SSL3_ST_SR_KEY_EXCH_A;
383 case SSL3_ST_SR_KEY_EXCH_A:
384 case SSL3_ST_SR_KEY_EXCH_B:
385 ret=ssl3_get_client_key_exchange(s);
386 if (ret <= 0) goto end;
387 s->state=SSL3_ST_SR_CERT_VRFY_A;
390 /* We need to get hashes here so if there is
391 * a client cert, it can be verified */
392 s->method->ssl3_enc->cert_verify_mac(s,
393 &(s->s3->finish_dgst1),
394 &(s->s3->tmp.cert_verify_md[0]));
395 s->method->ssl3_enc->cert_verify_mac(s,
396 &(s->s3->finish_dgst2),
397 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
401 case SSL3_ST_SR_CERT_VRFY_A:
402 case SSL3_ST_SR_CERT_VRFY_B:
404 /* we should decide if we expected this one */
405 ret=ssl3_get_cert_verify(s);
406 if (ret <= 0) goto end;
408 s->state=SSL3_ST_SR_FINISHED_A;
412 case SSL3_ST_SR_FINISHED_A:
413 case SSL3_ST_SR_FINISHED_B:
414 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
415 SSL3_ST_SR_FINISHED_B);
416 if (ret <= 0) goto end;
420 s->state=SSL3_ST_SW_CHANGE_A;
424 case SSL3_ST_SW_CHANGE_A:
425 case SSL3_ST_SW_CHANGE_B:
427 s->session->cipher=s->s3->tmp.new_cipher;
428 if (!s->method->ssl3_enc->setup_key_block(s))
429 { ret= -1; goto end; }
431 ret=ssl3_send_change_cipher_spec(s,
432 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
434 if (ret <= 0) goto end;
435 s->state=SSL3_ST_SW_FINISHED_A;
438 if (!s->method->ssl3_enc->change_cipher_state(s,
439 SSL3_CHANGE_CIPHER_SERVER_WRITE))
447 case SSL3_ST_SW_FINISHED_A:
448 case SSL3_ST_SW_FINISHED_B:
449 ret=ssl3_send_finished(s,
450 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
451 s->method->ssl3_enc->server_finished_label,
452 s->method->ssl3_enc->server_finished_label_len);
453 if (ret <= 0) goto end;
454 s->state=SSL3_ST_SW_FLUSH;
456 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
458 s->s3->tmp.next_state=SSL_ST_OK;
463 /* clean a few things up */
464 ssl3_cleanup_key_block(s);
466 BUF_MEM_free(s->init_buf);
469 /* remove buffering on output */
470 ssl_free_wbio_buffer(s);
475 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
477 s->ctx->stats.sess_accept_good++;
479 s->handshake_func=ssl3_accept;
482 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
488 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
494 if (!s->s3->tmp.reuse_message && !skip)
498 if ((ret=BIO_flush(s->wbio)) <= 0)
503 if ((cb != NULL) && (s->state != state))
507 cb(s,SSL_CB_ACCEPT_LOOP,1);
514 /* BIO_flush(s->wbio); */
517 cb(s,SSL_CB_ACCEPT_EXIT,ret);
522 static int ssl3_send_hello_request(SSL *s)
526 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
528 p=(unsigned char *)s->init_buf->data;
529 *(p++)=SSL3_MT_HELLO_REQUEST;
534 s->state=SSL3_ST_SW_HELLO_REQ_B;
535 /* number of bytes to write */
540 /* SSL3_ST_SW_HELLO_REQ_B */
541 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
544 static int ssl3_check_client_hello(SSL *s)
549 n=ssl3_get_message(s,
553 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
554 1024*30, /* 30k max cert list :-) */
556 1024*100, /* 100k max cert list :-) */
559 if (!ok) return((int)n);
560 s->s3->tmp.reuse_message = 1;
561 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
563 /* Throw away what we have done so far in the current handshake,
564 * which will now be aborted. (A full SSL_clear would be too much.)
565 * I hope that tmp.dh is the only thing that may need to be cleared
566 * when a handshake is not completed ... */
567 #ifndef OPENSSL_NO_DH
568 if (s->s3->tmp.dh != NULL)
570 DH_free(s->s3->tmp.dh);
571 s->s3->tmp.dh = NULL;
579 static int ssl3_get_client_hello(SSL *s)
581 int i,j,ok,al,ret= -1;
584 unsigned char *p,*d,*q;
587 STACK_OF(SSL_CIPHER) *ciphers=NULL;
589 /* We do this so that we will respond with our native type.
590 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
591 * This down switching should be handled by a different method.
592 * If we are SSLv3, we will respond with SSLv3, even if prompted with
595 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
598 s->state=SSL3_ST_SR_CLNT_HELLO_B;
600 n=ssl3_get_message(s,
601 SSL3_ST_SR_CLNT_HELLO_B,
602 SSL3_ST_SR_CLNT_HELLO_C,
603 SSL3_MT_CLIENT_HELLO,
604 SSL3_RT_MAX_PLAIN_LENGTH,
607 if (!ok) return((int)n);
608 d=p=(unsigned char *)s->init_buf->data;
610 /* use version from inside client hello, not from record header
611 * (may differ: see RFC 2246, Appendix E, second paragraph) */
612 s->client_version=(((int)p[0])<<8)|(int)p[1];
615 /* load the client random */
616 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
619 /* get the session-id */
625 if (!ssl_get_new_session(s,1))
630 i=ssl_get_prev_session(s,p,j);
632 { /* previous session */
639 if (!ssl_get_new_session(s,1))
646 if ((i == 0) && (j != 0))
648 /* we need a cipher if we are not resuming a session */
649 al=SSL_AD_ILLEGAL_PARAMETER;
650 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
655 /* not enough data */
656 al=SSL_AD_DECODE_ERROR;
657 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
660 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
667 /* If it is a hit, check that the cipher is in the list */
668 if ((s->hit) && (i > 0))
671 id=s->session->cipher->id;
674 printf("client sent %d ciphers\n",sk_num(ciphers));
676 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
678 c=sk_SSL_CIPHER_value(ciphers,i);
680 printf("client [%2d of %2d]:%s\n",
681 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
691 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
693 /* Very bad for multi-threading.... */
694 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
699 /* we need to have the cipher in the cipher
700 * list if we are asked to reuse it */
701 al=SSL_AD_ILLEGAL_PARAMETER;
702 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
713 if (p[j] == 0) break;
720 al=SSL_AD_DECODE_ERROR;
721 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
725 /* Worst case, we will use the NULL compression, but if we have other
726 * options, we will now look for them. We have i-1 compression
727 * algorithms from the client, starting at q. */
728 s->s3->tmp.new_compression=NULL;
729 if (s->ctx->comp_methods != NULL)
730 { /* See if we have a match */
733 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
736 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
749 s->s3->tmp.new_compression=comp;
754 /* TLS does not mind if there is extra stuff */
755 if (s->version == SSL3_VERSION)
759 /* wrong number of bytes,
760 * there could be more to follow */
761 al=SSL_AD_DECODE_ERROR;
762 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
767 /* Given s->session->ciphers and SSL_get_ciphers, we must
772 s->session->compress_meth=(comp == NULL)?0:comp->id;
773 if (s->session->ciphers != NULL)
774 sk_SSL_CIPHER_free(s->session->ciphers);
775 s->session->ciphers=ciphers;
778 al=SSL_AD_ILLEGAL_PARAMETER;
779 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
783 c=ssl3_choose_cipher(s,s->session->ciphers,
788 al=SSL_AD_HANDSHAKE_FAILURE;
789 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
792 s->s3->tmp.new_cipher=c;
796 /* Session-id reuse */
797 #ifdef REUSE_CIPHER_BUG
798 STACK_OF(SSL_CIPHER) *sk;
802 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
804 sk=s->session->ciphers;
805 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
807 c=sk_SSL_CIPHER_value(sk,i);
808 if (c->algorithms & SSL_eNULL)
810 if (SSL_C_IS_EXPORT(c))
814 s->s3->tmp.new_cipher=nc;
816 s->s3->tmp.new_cipher=ec;
818 s->s3->tmp.new_cipher=s->session->cipher;
822 s->s3->tmp.new_cipher=s->session->cipher;
825 /* we now have the following setup.
827 * cipher_list - our prefered list of ciphers
828 * ciphers - the clients prefered list of ciphers
829 * compression - basically ignored right now
830 * ssl version is set - sslv3
831 * s->session - The ssl session has been setup.
832 * s->hit - session reuse flag
833 * s->tmp.new_cipher - the new cipher to use.
840 ssl3_send_alert(s,SSL3_AL_FATAL,al);
843 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
847 static int ssl3_send_server_hello(SSL *s)
852 unsigned long l,Time;
854 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
856 buf=(unsigned char *)s->init_buf->data;
857 p=s->s3->server_random;
858 Time=time(NULL); /* Time */
860 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
861 /* Do the message type and length last */
864 *(p++)=s->version>>8;
865 *(p++)=s->version&0xff;
868 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
871 /* now in theory we have 3 options to sending back the
872 * session id. If it is a re-use, we send back the
873 * old session-id, if it is a new session, we send
874 * back the new session-id or we send back a 0 length
875 * session-id if we want it to be single use.
876 * Currently I will not implement the '0' length session-id
877 * 12-Jan-98 - I'll now support the '0' length stuff.
879 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
880 s->session->session_id_length=0;
882 sl=s->session->session_id_length;
884 memcpy(p,s->session->session_id,sl);
888 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
891 /* put the compression method */
892 if (s->s3->tmp.new_compression == NULL)
895 *(p++)=s->s3->tmp.new_compression->id;
900 *(d++)=SSL3_MT_SERVER_HELLO;
903 s->state=SSL3_ST_CW_CLNT_HELLO_B;
904 /* number of bytes to write */
909 /* SSL3_ST_CW_CLNT_HELLO_B */
910 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
913 static int ssl3_send_server_done(SSL *s)
917 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
919 p=(unsigned char *)s->init_buf->data;
922 *(p++)=SSL3_MT_SERVER_DONE;
927 s->state=SSL3_ST_SW_SRVR_DONE_B;
928 /* number of bytes to write */
933 /* SSL3_ST_CW_CLNT_HELLO_B */
934 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
937 static int ssl3_send_server_key_exchange(SSL *s)
939 #ifndef OPENSSL_NO_RSA
943 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
946 #ifndef OPENSSL_NO_DH
960 EVP_MD_CTX_init(&md_ctx);
961 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
963 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
968 r[0]=r[1]=r[2]=r[3]=NULL;
970 #ifndef OPENSSL_NO_RSA
974 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
976 rsa=s->cert->rsa_tmp_cb(s,
977 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
978 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
981 al=SSL_AD_HANDSHAKE_FAILURE;
982 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
990 al=SSL_AD_HANDSHAKE_FAILURE;
991 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
996 s->s3->tmp.use_rsa_tmp=1;
1000 #ifndef OPENSSL_NO_DH
1001 if (type & SSL_kEDH)
1004 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1005 dhp=s->cert->dh_tmp_cb(s,
1006 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1007 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1010 al=SSL_AD_HANDSHAKE_FAILURE;
1011 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1015 if (s->s3->tmp.dh != NULL)
1018 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1022 if ((dh=DHparams_dup(dhp)) == NULL)
1024 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1029 if ((dhp->pub_key == NULL ||
1030 dhp->priv_key == NULL ||
1031 (s->options & SSL_OP_SINGLE_DH_USE)))
1033 if(!DH_generate_key(dh))
1035 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1042 dh->pub_key=BN_dup(dhp->pub_key);
1043 dh->priv_key=BN_dup(dhp->priv_key);
1044 if ((dh->pub_key == NULL) ||
1045 (dh->priv_key == NULL))
1047 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1058 al=SSL_AD_HANDSHAKE_FAILURE;
1059 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1062 for (i=0; r[i] != NULL; i++)
1064 nr[i]=BN_num_bytes(r[i]);
1068 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1070 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1073 al=SSL_AD_DECODE_ERROR;
1076 kn=EVP_PKEY_size(pkey);
1084 if (!BUF_MEM_grow(buf,n+4+kn))
1086 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1089 d=(unsigned char *)s->init_buf->data;
1092 for (i=0; r[i] != NULL; i++)
1102 /* n is the length of the params, they start at &(d[4])
1103 * and p points to the space at the end. */
1104 #ifndef OPENSSL_NO_RSA
1105 if (pkey->type == EVP_PKEY_RSA)
1109 for (num=2; num > 0; num--)
1111 EVP_DigestInit(&md_ctx,(num == 2)
1112 ?s->ctx->md5:s->ctx->sha1);
1113 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1114 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1115 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1116 EVP_DigestFinal(&md_ctx,q,
1117 (unsigned int *)&i);
1121 if (RSA_sign(NID_md5_sha1, md_buf, j,
1122 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1124 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1132 #if !defined(OPENSSL_NO_DSA)
1133 if (pkey->type == EVP_PKEY_DSA)
1136 EVP_SignInit(&md_ctx,EVP_dss1());
1137 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1138 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1139 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1140 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1141 (unsigned int *)&i,pkey))
1143 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1152 /* Is this error check actually needed? */
1153 al=SSL_AD_HANDSHAKE_FAILURE;
1154 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1159 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1162 /* we should now have things packed up, so lets send
1168 s->state = SSL3_ST_SW_KEY_EXCH_B;
1169 EVP_MD_CTX_cleanup(&md_ctx);
1170 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1172 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1174 EVP_MD_CTX_cleanup(&md_ctx);
1178 static int ssl3_send_certificate_request(SSL *s)
1180 unsigned char *p,*d;
1182 STACK_OF(X509_NAME) *sk=NULL;
1186 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1190 d=p=(unsigned char *)&(buf->data[4]);
1192 /* get the list of acceptable cert types */
1194 n=ssl3_get_req_cert_type(s,p);
1203 sk=SSL_get_client_CA_list(s);
1207 for (i=0; i<sk_X509_NAME_num(sk); i++)
1209 name=sk_X509_NAME_value(sk,i);
1210 j=i2d_X509_NAME(name,NULL);
1211 if (!BUF_MEM_grow(buf,4+n+j+2))
1213 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1216 p=(unsigned char *)&(buf->data[4+n]);
1217 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1220 i2d_X509_NAME(name,&p);
1227 i2d_X509_NAME(name,&p);
1228 j-=2; s2n(j,d); j+=2;
1234 /* else no CA names */
1235 p=(unsigned char *)&(buf->data[4+off]);
1238 d=(unsigned char *)buf->data;
1239 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1242 /* we should now have things packed up, so lets send
1247 #ifdef NETSCAPE_HANG_BUG
1248 p=(unsigned char *)s->init_buf->data + s->init_num;
1251 *(p++)=SSL3_MT_SERVER_DONE;
1260 /* SSL3_ST_SW_CERT_REQ_B */
1261 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1266 static int ssl3_get_client_key_exchange(SSL *s)
1272 #ifndef OPENSSL_NO_RSA
1274 EVP_PKEY *pkey=NULL;
1276 #ifndef OPENSSL_NO_DH
1280 #ifndef OPENSSL_NO_KRB5
1282 #endif /* OPENSSL_NO_KRB5 */
1284 n=ssl3_get_message(s,
1285 SSL3_ST_SR_KEY_EXCH_A,
1286 SSL3_ST_SR_KEY_EXCH_B,
1287 SSL3_MT_CLIENT_KEY_EXCHANGE,
1291 if (!ok) return((int)n);
1292 p=(unsigned char *)s->init_buf->data;
1294 l=s->s3->tmp.new_cipher->algorithms;
1296 #ifndef OPENSSL_NO_RSA
1299 /* FIX THIS UP EAY EAY EAY EAY */
1300 if (s->s3->tmp.use_rsa_tmp)
1302 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1303 rsa=s->cert->rsa_tmp;
1304 /* Don't do a callback because rsa_tmp should
1305 * be sent already */
1308 al=SSL_AD_HANDSHAKE_FAILURE;
1309 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1316 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1317 if ( (pkey == NULL) ||
1318 (pkey->type != EVP_PKEY_RSA) ||
1319 (pkey->pkey.rsa == NULL))
1321 al=SSL_AD_HANDSHAKE_FAILURE;
1322 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1329 if (s->version > SSL3_VERSION)
1334 if (!(s->options & SSL_OP_TLS_D5_BUG))
1336 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1346 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1350 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1352 al=SSL_AD_DECODE_ERROR;
1353 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1356 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1358 /* The premaster secret must contain the same version number as the
1359 * ClientHello to detect version rollback attacks (strangely, the
1360 * protocol does not offer such protection for DH ciphersuites).
1361 * However, buggy clients exist that send the negotiated protocol
1362 * version instead if the server does not support the requested
1364 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1365 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1366 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1368 al=SSL_AD_DECODE_ERROR;
1369 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1379 /* Some decryption failure -- use random value instead as countermeasure
1380 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1381 * (see RFC 2246, section 7.4.7.1).
1382 * But note that due to length and protocol version checking, the
1383 * attack is impractical anyway (see section 5 in D. Bleichenbacher:
1384 * "Chosen Ciphertext Attacks Against Protocols Based on the RSA
1385 * Encryption Standard PKCS #1", CRYPTO '98, LNCS 1462, pp. 1-12).
1388 i = SSL_MAX_MASTER_KEY_LENGTH;
1389 p[0] = s->client_version >> 8;
1390 p[1] = s->client_version & 0xff;
1391 RAND_pseudo_bytes(p+2, i-2); /* should be RAND_bytes, but we cannot work around a failure */
1395 s->session->master_key_length=
1396 s->method->ssl3_enc->generate_master_secret(s,
1397 s->session->master_key,
1403 #ifndef OPENSSL_NO_DH
1404 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1409 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1411 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1421 if (n == 0L) /* the parameters are in the cert */
1423 al=SSL_AD_HANDSHAKE_FAILURE;
1424 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1429 if (s->s3->tmp.dh == NULL)
1431 al=SSL_AD_HANDSHAKE_FAILURE;
1432 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1436 dh_srvr=s->s3->tmp.dh;
1439 pub=BN_bin2bn(p,i,NULL);
1442 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1446 i=DH_compute_key(p,pub,dh_srvr);
1450 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1454 DH_free(s->s3->tmp.dh);
1459 s->session->master_key_length=
1460 s->method->ssl3_enc->generate_master_secret(s,
1461 s->session->master_key,p,i);
1466 #ifndef OPENSSL_NO_KRB5
1469 krb5_error_code krb5rc;
1470 krb5_data enc_ticket;
1471 krb5_data authenticator;
1473 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1474 EVP_CIPHER_CTX ciph_ctx;
1475 EVP_CIPHER *enc = NULL;
1476 unsigned char iv[EVP_MAX_IV_LENGTH];
1477 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1478 + EVP_MAX_IV_LENGTH + 1];
1479 int padl, outl = sizeof(pms);
1480 krb5_timestamp authtime = 0;
1481 krb5_ticket_times ttimes;
1483 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1486 enc_ticket.length = i;
1487 enc_ticket.data = p;
1488 p+=enc_ticket.length;
1491 authenticator.length = i;
1492 authenticator.data = p;
1493 p+=authenticator.length;
1500 if ((unsigned long)n != enc_ticket.length + authenticator.length +
1503 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1504 SSL_R_DATA_LENGTH_TOO_LONG);
1508 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1512 printf("kssl_sget_tkt rtn %d [%d]\n",
1513 krb5rc, kssl_err.reason);
1515 printf("kssl_err text= %s\n", kssl_err.text);
1516 #endif /* KSSL_DEBUG */
1517 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1522 /* Note: no authenticator is not considered an error,
1523 ** but will return authtime == 0.
1525 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
1526 &authtime, &kssl_err)) != 0)
1529 printf("kssl_check_authent rtn %d [%d]\n",
1530 krb5rc, kssl_err.reason);
1532 printf("kssl_err text= %s\n", kssl_err.text);
1533 #endif /* KSSL_DEBUG */
1534 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1539 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
1541 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, krb5rc);
1546 kssl_ctx_show(kssl_ctx);
1547 #endif /* KSSL_DEBUG */
1549 enc = kssl_map_enc(kssl_ctx->enctype);
1553 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1555 if (!EVP_DecryptInit(&ciph_ctx,enc,kssl_ctx->key,iv))
1557 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1558 SSL_R_DECRYPTION_FAILED);
1561 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
1562 enc_pms.data, enc_pms.length))
1564 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1565 SSL_R_DECRYPTION_FAILED);
1568 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1570 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1571 SSL_R_DATA_LENGTH_TOO_LONG);
1574 if (!EVP_DecryptFinal(&ciph_ctx,&(pms[outl]),&padl))
1576 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1577 SSL_R_DECRYPTION_FAILED);
1581 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
1583 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1584 SSL_R_DATA_LENGTH_TOO_LONG);
1587 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1589 s->session->master_key_length=
1590 s->method->ssl3_enc->generate_master_secret(s,
1591 s->session->master_key, pms, outl);
1593 if (kssl_ctx->client_princ)
1595 int len = strlen(kssl_ctx->client_princ);
1596 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
1598 s->session->krb5_client_princ_len = len;
1599 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
1604 /* Was doing kssl_ctx_free() here,
1605 ** but it caused problems for apache.
1606 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
1607 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
1611 #endif /* OPENSSL_NO_KRB5 */
1613 al=SSL_AD_HANDSHAKE_FAILURE;
1614 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1615 SSL_R_UNKNOWN_CIPHER_TYPE);
1621 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1622 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA)
1628 static int ssl3_get_cert_verify(SSL *s)
1630 EVP_PKEY *pkey=NULL;
1637 n=ssl3_get_message(s,
1638 SSL3_ST_SR_CERT_VRFY_A,
1639 SSL3_ST_SR_CERT_VRFY_B,
1644 if (!ok) return((int)n);
1646 if (s->session->peer != NULL)
1648 peer=s->session->peer;
1649 pkey=X509_get_pubkey(peer);
1650 type=X509_certificate_type(peer,pkey);
1658 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1660 s->s3->tmp.reuse_message=1;
1661 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1663 al=SSL_AD_UNEXPECTED_MESSAGE;
1664 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1673 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1674 al=SSL_AD_UNEXPECTED_MESSAGE;
1678 if (!(type & EVP_PKT_SIGN))
1680 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1681 al=SSL_AD_ILLEGAL_PARAMETER;
1685 if (s->s3->change_cipher_spec)
1687 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1688 al=SSL_AD_UNEXPECTED_MESSAGE;
1692 /* we now have a signature that we need to verify */
1693 p=(unsigned char *)s->init_buf->data;
1698 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1699 al=SSL_AD_DECODE_ERROR;
1703 j=EVP_PKEY_size(pkey);
1704 if ((i > j) || (n > j) || (n <= 0))
1706 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1707 al=SSL_AD_DECODE_ERROR;
1711 #ifndef OPENSSL_NO_RSA
1712 if (pkey->type == EVP_PKEY_RSA)
1714 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1715 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1719 al=SSL_AD_DECRYPT_ERROR;
1720 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1725 al=SSL_AD_DECRYPT_ERROR;
1726 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1732 #ifndef OPENSSL_NO_DSA
1733 if (pkey->type == EVP_PKEY_DSA)
1735 j=DSA_verify(pkey->save_type,
1736 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1737 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1741 al=SSL_AD_DECRYPT_ERROR;
1742 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1749 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
1750 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1759 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1762 EVP_PKEY_free(pkey);
1766 static int ssl3_get_client_certificate(SSL *s)
1768 int i,ok,al,ret= -1;
1770 unsigned long l,nc,llen,n;
1771 unsigned char *p,*d,*q;
1772 STACK_OF(X509) *sk=NULL;
1774 n=ssl3_get_message(s,
1778 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
1779 1024*30, /* 30k max cert list :-) */
1781 1024*100, /* 100k max cert list :-) */
1785 if (!ok) return((int)n);
1787 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1789 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1790 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1792 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1793 al=SSL_AD_HANDSHAKE_FAILURE;
1796 /* If tls asked for a client cert, the client must return a 0 list */
1797 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1799 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1800 al=SSL_AD_UNEXPECTED_MESSAGE;
1803 s->s3->tmp.reuse_message=1;
1807 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1809 al=SSL_AD_UNEXPECTED_MESSAGE;
1810 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1813 d=p=(unsigned char *)s->init_buf->data;
1815 if ((sk=sk_X509_new_null()) == NULL)
1817 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1824 al=SSL_AD_DECODE_ERROR;
1825 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1828 for (nc=0; nc<llen; )
1831 if ((l+nc+3) > llen)
1833 al=SSL_AD_DECODE_ERROR;
1834 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1839 x=d2i_X509(NULL,&p,l);
1842 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1847 al=SSL_AD_DECODE_ERROR;
1848 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1851 if (!sk_X509_push(sk,x))
1853 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1860 if (sk_X509_num(sk) <= 0)
1862 /* TLS does not mind 0 certs returned */
1863 if (s->version == SSL3_VERSION)
1865 al=SSL_AD_HANDSHAKE_FAILURE;
1866 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1869 /* Fail for TLS only if we required a certificate */
1870 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1871 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1873 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1874 al=SSL_AD_HANDSHAKE_FAILURE;
1880 i=ssl_verify_cert_chain(s,sk);
1883 al=ssl_verify_alarm_type(s->verify_result);
1884 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1889 if (s->session->peer != NULL) /* This should not be needed */
1890 X509_free(s->session->peer);
1891 s->session->peer=sk_X509_shift(sk);
1892 s->session->verify_result = s->verify_result;
1894 /* With the current implementation, sess_cert will always be NULL
1895 * when we arrive here. */
1896 if (s->session->sess_cert == NULL)
1898 s->session->sess_cert = ssl_sess_cert_new();
1899 if (s->session->sess_cert == NULL)
1901 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1905 if (s->session->sess_cert->cert_chain != NULL)
1906 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1907 s->session->sess_cert->cert_chain=sk;
1908 /* Inconsistency alert: cert_chain does *not* include the
1909 * peer's own certificate, while we do include it in s3_clnt.c */
1917 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1920 if (x != NULL) X509_free(x);
1921 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1925 int ssl3_send_server_certificate(SSL *s)
1930 if (s->state == SSL3_ST_SW_CERT_A)
1932 x=ssl_get_server_send_cert(s);
1934 /* VRS: allow null cert if auth == KRB5 */
1935 (s->s3->tmp.new_cipher->algorithms
1936 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
1937 != (SSL_aKRB5|SSL_kKRB5))
1939 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
1943 l=ssl3_output_cert_chain(s,x);
1944 s->state=SSL3_ST_SW_CERT_B;
1949 /* SSL3_ST_SW_CERT_B */
1950 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));