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/md5.h>
68 #include <openssl/sha.h>
69 #include <openssl/evp.h>
70 #include <openssl/x509.h>
73 static SSL_METHOD *ssl3_get_server_method(int ver);
74 static int ssl3_get_client_hello(SSL *s);
75 static int ssl3_check_client_hello(SSL *s);
76 static int ssl3_send_server_hello(SSL *s);
77 static int ssl3_send_server_key_exchange(SSL *s);
78 static int ssl3_send_certificate_request(SSL *s);
79 static int ssl3_send_server_done(SSL *s);
80 static int ssl3_get_cert_verify(SSL *s);
81 static int ssl3_get_client_key_exchange(SSL *s);
82 static int ssl3_get_client_certificate(SSL *s);
83 static int ssl3_send_hello_request(SSL *s);
85 static SSL_METHOD *ssl3_get_server_method(int ver)
87 if (ver == SSL3_VERSION)
88 return(SSLv3_server_method());
93 SSL_METHOD *SSLv3_server_method(void)
96 static SSL_METHOD SSLv3_server_data;
100 memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(),
102 SSLv3_server_data.ssl_accept=ssl3_accept;
103 SSLv3_server_data.get_ssl_method=ssl3_get_server_method;
106 return(&SSLv3_server_data);
109 int ssl3_accept(SSL *s)
112 unsigned long l,Time=time(NULL);
116 int new_state,state,skip=0;
118 RAND_add(&Time,sizeof(Time),0);
122 if (s->info_callback != NULL)
124 else if (s->ctx->info_callback != NULL)
125 cb=s->ctx->info_callback;
127 /* init things to blank */
128 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
133 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
143 case SSL_ST_RENEGOTIATE:
145 /* s->state=SSL_ST_ACCEPT; */
149 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
150 case SSL_ST_OK|SSL_ST_ACCEPT:
153 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
155 if ((s->version>>8) != 3)
157 /* s->version=SSL3_VERSION; */
158 s->type=SSL_ST_ACCEPT;
160 if (s->init_buf == NULL)
162 if ((buf=BUF_MEM_new()) == NULL)
167 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
175 if (!ssl3_setup_buffers(s))
181 /* Ok, we now need to push on a buffering BIO so that
182 * the output is sent in a way that TCP likes :-)
184 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
188 if (s->state != SSL_ST_RENEGOTIATE)
190 ssl3_init_finished_mac(s);
191 s->state=SSL3_ST_SR_CLNT_HELLO_A;
192 s->ctx->stats.sess_accept++;
196 s->ctx->stats.sess_accept_renegotiate++;
197 s->state=SSL3_ST_SW_HELLO_REQ_A;
201 case SSL3_ST_SW_HELLO_REQ_A:
202 case SSL3_ST_SW_HELLO_REQ_B:
205 ret=ssl3_send_hello_request(s);
206 if (ret <= 0) goto end;
207 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
208 s->state=SSL3_ST_SW_FLUSH;
211 ssl3_init_finished_mac(s);
214 case SSL3_ST_SW_HELLO_REQ_C:
220 case SSL3_ST_SR_CLNT_HELLO_A:
221 case SSL3_ST_SR_CLNT_HELLO_B:
222 case SSL3_ST_SR_CLNT_HELLO_C:
225 ret=ssl3_get_client_hello(s);
226 if (ret <= 0) goto end;
227 s->state=SSL3_ST_SW_SRVR_HELLO_A;
231 case SSL3_ST_SW_SRVR_HELLO_A:
232 case SSL3_ST_SW_SRVR_HELLO_B:
233 ret=ssl3_send_server_hello(s);
234 if (ret <= 0) goto end;
237 s->state=SSL3_ST_SW_CHANGE_A;
239 s->state=SSL3_ST_SW_CERT_A;
243 case SSL3_ST_SW_CERT_A:
244 case SSL3_ST_SW_CERT_B:
245 /* Check if it is anon DH */
246 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
248 ret=ssl3_send_server_certificate(s);
249 if (ret <= 0) goto end;
253 s->state=SSL3_ST_SW_KEY_EXCH_A;
257 case SSL3_ST_SW_KEY_EXCH_A:
258 case SSL3_ST_SW_KEY_EXCH_B:
259 l=s->s3->tmp.new_cipher->algorithms;
261 /* clear this, it may get reset by
262 * send_server_key_exchange */
263 if (s->options & SSL_OP_EPHEMERAL_RSA)
264 s->s3->tmp.use_rsa_tmp=1;
266 s->s3->tmp.use_rsa_tmp=0;
268 /* only send if a DH key exchange, fortezza or
269 * RSA but we have a sign only certificate */
270 if (s->s3->tmp.use_rsa_tmp
271 || (l & (SSL_DH|SSL_kFZA))
273 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
274 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
275 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
281 ret=ssl3_send_server_key_exchange(s);
282 if (ret <= 0) goto end;
287 s->state=SSL3_ST_SW_CERT_REQ_A;
291 case SSL3_ST_SW_CERT_REQ_A:
292 case SSL3_ST_SW_CERT_REQ_B:
293 if (/* don't request cert unless asked for it: */
294 !(s->verify_mode & SSL_VERIFY_PEER) ||
295 /* if SSL_VERIFY_CLIENT_ONCE is set,
296 * don't request cert during re-negotiation: */
297 ((s->session->peer != NULL) &&
298 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
299 /* never request cert in anonymous ciphersuites
300 * (see section "Certificate request" in SSL 3 drafts
301 * and in RFC 2246): */
302 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
303 /* ... except when the application insists on verification
304 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
305 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)))
307 /* no cert request */
309 s->s3->tmp.cert_request=0;
310 s->state=SSL3_ST_SW_SRVR_DONE_A;
314 s->s3->tmp.cert_request=1;
315 ret=ssl3_send_certificate_request(s);
316 if (ret <= 0) goto end;
317 #ifndef NETSCAPE_HANG_BUG
318 s->state=SSL3_ST_SW_SRVR_DONE_A;
320 s->state=SSL3_ST_SW_FLUSH;
321 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
327 case SSL3_ST_SW_SRVR_DONE_A:
328 case SSL3_ST_SW_SRVR_DONE_B:
329 ret=ssl3_send_server_done(s);
330 if (ret <= 0) goto end;
331 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
332 s->state=SSL3_ST_SW_FLUSH;
336 case SSL3_ST_SW_FLUSH:
337 /* number of bytes to be flushed */
338 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
341 s->rwstate=SSL_WRITING;
342 num1=BIO_flush(s->wbio);
343 if (num1 <= 0) { ret= -1; goto end; }
344 s->rwstate=SSL_NOTHING;
347 s->state=s->s3->tmp.next_state;
350 case SSL3_ST_SR_CERT_A:
351 case SSL3_ST_SR_CERT_B:
352 /* Check for second client hello (MS SGC) */
353 ret = ssl3_check_client_hello(s);
357 s->state = SSL3_ST_SR_CLNT_HELLO_C;
359 /* could be sent for a DH cert, even if we
360 * have not asked for it :-) */
361 ret=ssl3_get_client_certificate(s);
362 if (ret <= 0) goto end;
364 s->state=SSL3_ST_SR_KEY_EXCH_A;
368 case SSL3_ST_SR_KEY_EXCH_A:
369 case SSL3_ST_SR_KEY_EXCH_B:
370 ret=ssl3_get_client_key_exchange(s);
371 if (ret <= 0) goto end;
372 s->state=SSL3_ST_SR_CERT_VRFY_A;
375 /* We need to get hashes here so if there is
376 * a client cert, it can be verified */
377 s->method->ssl3_enc->cert_verify_mac(s,
378 &(s->s3->finish_dgst1),
379 &(s->s3->tmp.cert_verify_md[0]));
380 s->method->ssl3_enc->cert_verify_mac(s,
381 &(s->s3->finish_dgst2),
382 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
386 case SSL3_ST_SR_CERT_VRFY_A:
387 case SSL3_ST_SR_CERT_VRFY_B:
389 /* we should decide if we expected this one */
390 ret=ssl3_get_cert_verify(s);
391 if (ret <= 0) goto end;
393 s->state=SSL3_ST_SR_FINISHED_A;
397 case SSL3_ST_SR_FINISHED_A:
398 case SSL3_ST_SR_FINISHED_B:
399 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
400 SSL3_ST_SR_FINISHED_B);
401 if (ret <= 0) goto end;
405 s->state=SSL3_ST_SW_CHANGE_A;
409 case SSL3_ST_SW_CHANGE_A:
410 case SSL3_ST_SW_CHANGE_B:
412 s->session->cipher=s->s3->tmp.new_cipher;
413 if (!s->method->ssl3_enc->setup_key_block(s))
414 { ret= -1; goto end; }
416 ret=ssl3_send_change_cipher_spec(s,
417 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
419 if (ret <= 0) goto end;
420 s->state=SSL3_ST_SW_FINISHED_A;
423 if (!s->method->ssl3_enc->change_cipher_state(s,
424 SSL3_CHANGE_CIPHER_SERVER_WRITE))
432 case SSL3_ST_SW_FINISHED_A:
433 case SSL3_ST_SW_FINISHED_B:
434 ret=ssl3_send_finished(s,
435 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
436 s->method->ssl3_enc->server_finished_label,
437 s->method->ssl3_enc->server_finished_label_len);
438 if (ret <= 0) goto end;
439 s->state=SSL3_ST_SW_FLUSH;
441 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
443 s->s3->tmp.next_state=SSL_ST_OK;
448 /* clean a few things up */
449 ssl3_cleanup_key_block(s);
451 BUF_MEM_free(s->init_buf);
454 /* remove buffering on output */
455 ssl_free_wbio_buffer(s);
460 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
462 s->ctx->stats.sess_accept_good++;
464 s->handshake_func=ssl3_accept;
467 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
473 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
479 if (!s->s3->tmp.reuse_message && !skip)
483 if ((ret=BIO_flush(s->wbio)) <= 0)
488 if ((cb != NULL) && (s->state != state))
492 cb(s,SSL_CB_ACCEPT_LOOP,1);
499 /* BIO_flush(s->wbio); */
502 cb(s,SSL_CB_ACCEPT_EXIT,ret);
507 static int ssl3_send_hello_request(SSL *s)
511 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
513 p=(unsigned char *)s->init_buf->data;
514 *(p++)=SSL3_MT_HELLO_REQUEST;
519 s->state=SSL3_ST_SW_HELLO_REQ_B;
520 /* number of bytes to write */
525 /* SSL3_ST_SW_HELLO_REQ_B */
526 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
529 static int ssl3_check_client_hello(SSL *s)
534 n=ssl3_get_message(s,
538 SSL3_RT_MAX_PLAIN_LENGTH,
540 if (!ok) return((int)n);
541 s->s3->tmp.reuse_message = 1;
542 if(s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) return 2;
546 static int ssl3_get_client_hello(SSL *s)
548 int i,j,ok,al,ret= -1;
551 unsigned char *p,*d,*q;
554 STACK_OF(SSL_CIPHER) *ciphers=NULL;
556 /* We do this so that we will respond with our native type.
557 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
558 * This down switching should be handled by a different method.
559 * If we are SSLv3, we will respond with SSLv3, even if prompted with
562 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
565 s->state=SSL3_ST_SR_CLNT_HELLO_B;
567 n=ssl3_get_message(s,
568 SSL3_ST_SR_CLNT_HELLO_B,
569 SSL3_ST_SR_CLNT_HELLO_C,
570 SSL3_MT_CLIENT_HELLO,
571 SSL3_RT_MAX_PLAIN_LENGTH,
574 if (!ok) return((int)n);
575 d=p=(unsigned char *)s->init_buf->data;
577 /* use version from inside client hello, not from record header
578 * (may differ: see RFC 2246, Appendix E, second paragraph) */
579 s->client_version=(((int)p[0])<<8)|(int)p[1];
582 /* load the client random */
583 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
586 /* get the session-id */
592 if (!ssl_get_new_session(s,1))
597 i=ssl_get_prev_session(s,p,j);
599 { /* previous session */
606 if (!ssl_get_new_session(s,1))
613 if ((i == 0) && (j != 0))
615 /* we need a cipher if we are not resuming a session */
616 al=SSL_AD_ILLEGAL_PARAMETER;
617 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
622 /* not enough data */
623 al=SSL_AD_DECODE_ERROR;
624 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
627 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
634 /* If it is a hit, check that the cipher is in the list */
635 if ((s->hit) && (i > 0))
638 id=s->session->cipher->id;
641 printf("client sent %d ciphers\n",sk_num(ciphers));
643 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
645 c=sk_SSL_CIPHER_value(ciphers,i);
647 printf("client [%2d of %2d]:%s\n",
648 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
658 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
660 /* Very bad for multi-threading.... */
661 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
666 /* we need to have the cipher in the cipher
667 * list if we are asked to reuse it */
668 al=SSL_AD_ILLEGAL_PARAMETER;
669 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
680 if (p[j] == 0) break;
687 al=SSL_AD_DECODE_ERROR;
688 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
692 /* Worst case, we will use the NULL compression, but if we have other
693 * options, we will now look for them. We have i-1 compression
694 * algorithms from the client, starting at q. */
695 s->s3->tmp.new_compression=NULL;
696 if (s->ctx->comp_methods != NULL)
697 { /* See if we have a match */
700 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
703 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
716 s->s3->tmp.new_compression=comp;
721 /* TLS does not mind if there is extra stuff */
722 if (s->version == SSL3_VERSION)
726 /* wrong number of bytes,
727 * there could be more to follow */
728 al=SSL_AD_DECODE_ERROR;
729 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
734 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
739 s->session->compress_meth=(comp == NULL)?0:comp->id;
740 if (s->session->ciphers != NULL)
741 sk_SSL_CIPHER_free(s->session->ciphers);
742 s->session->ciphers=ciphers;
745 al=SSL_AD_ILLEGAL_PARAMETER;
746 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
750 c=ssl3_choose_cipher(s,s->session->ciphers,
751 ssl_get_ciphers_by_id(s));
755 al=SSL_AD_HANDSHAKE_FAILURE;
756 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
759 s->s3->tmp.new_cipher=c;
763 /* Session-id reuse */
764 #ifdef REUSE_CIPHER_BUG
765 STACK_OF(SSL_CIPHER) *sk;
769 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
771 sk=s->session->ciphers;
772 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
774 c=sk_SSL_CIPHER_value(sk,i);
775 if (c->algorithms & SSL_eNULL)
777 if (SSL_C_IS_EXPORT(c))
781 s->s3->tmp.new_cipher=nc;
783 s->s3->tmp.new_cipher=ec;
785 s->s3->tmp.new_cipher=s->session->cipher;
789 s->s3->tmp.new_cipher=s->session->cipher;
792 /* we now have the following setup.
794 * cipher_list - our prefered list of ciphers
795 * ciphers - the clients prefered list of ciphers
796 * compression - basically ignored right now
797 * ssl version is set - sslv3
798 * s->session - The ssl session has been setup.
799 * s->hit - session reuse flag
800 * s->tmp.new_cipher - the new cipher to use.
807 ssl3_send_alert(s,SSL3_AL_FATAL,al);
810 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
814 static int ssl3_send_server_hello(SSL *s)
819 unsigned long l,Time;
821 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
823 buf=(unsigned char *)s->init_buf->data;
824 p=s->s3->server_random;
825 Time=time(NULL); /* Time */
827 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
828 /* Do the message type and length last */
831 *(p++)=s->version>>8;
832 *(p++)=s->version&0xff;
835 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
838 /* now in theory we have 3 options to sending back the
839 * session id. If it is a re-use, we send back the
840 * old session-id, if it is a new session, we send
841 * back the new session-id or we send back a 0 length
842 * session-id if we want it to be single use.
843 * Currently I will not implement the '0' length session-id
844 * 12-Jan-98 - I'll now support the '0' length stuff.
846 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
847 s->session->session_id_length=0;
849 sl=s->session->session_id_length;
851 memcpy(p,s->session->session_id,sl);
855 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
858 /* put the compression method */
859 if (s->s3->tmp.new_compression == NULL)
862 *(p++)=s->s3->tmp.new_compression->id;
867 *(d++)=SSL3_MT_SERVER_HELLO;
870 s->state=SSL3_ST_CW_CLNT_HELLO_B;
871 /* number of bytes to write */
876 /* SSL3_ST_CW_CLNT_HELLO_B */
877 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
880 static int ssl3_send_server_done(SSL *s)
884 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
886 p=(unsigned char *)s->init_buf->data;
889 *(p++)=SSL3_MT_SERVER_DONE;
894 s->state=SSL3_ST_SW_SRVR_DONE_B;
895 /* number of bytes to write */
900 /* SSL3_ST_CW_CLNT_HELLO_B */
901 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
904 static int ssl3_send_server_key_exchange(SSL *s)
910 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
927 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
929 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
934 r[0]=r[1]=r[2]=r[3]=NULL;
940 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
942 rsa=s->cert->rsa_tmp_cb(s,
943 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
944 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
945 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
950 al=SSL_AD_HANDSHAKE_FAILURE;
951 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
956 s->s3->tmp.use_rsa_tmp=1;
964 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
965 dhp=s->cert->dh_tmp_cb(s,
966 !SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
967 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
970 al=SSL_AD_HANDSHAKE_FAILURE;
971 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
975 if (s->s3->tmp.dh != NULL)
978 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, SSL_R_INTERNAL_ERROR);
982 if ((dh=DHparams_dup(dhp)) == NULL)
984 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
989 if ((dhp->pub_key == NULL ||
990 dhp->priv_key == NULL ||
991 (s->options & SSL_OP_SINGLE_DH_USE)))
993 if(!DH_generate_key(dh))
995 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1002 dh->pub_key=BN_dup(dhp->pub_key);
1003 dh->priv_key=BN_dup(dhp->priv_key);
1004 if ((dh->pub_key == NULL) ||
1005 (dh->priv_key == NULL))
1007 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1018 al=SSL_AD_HANDSHAKE_FAILURE;
1019 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1022 for (i=0; r[i] != NULL; i++)
1024 nr[i]=BN_num_bytes(r[i]);
1028 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1030 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1033 al=SSL_AD_DECODE_ERROR;
1036 kn=EVP_PKEY_size(pkey);
1044 if (!BUF_MEM_grow(buf,n+4+kn))
1046 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1049 d=(unsigned char *)s->init_buf->data;
1052 for (i=0; r[i] != NULL; i++)
1062 /* n is the length of the params, they start at &(d[4])
1063 * and p points to the space at the end. */
1065 if (pkey->type == EVP_PKEY_RSA)
1069 for (num=2; num > 0; num--)
1071 EVP_DigestInit(&md_ctx,(num == 2)
1072 ?s->ctx->md5:s->ctx->sha1);
1073 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1074 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1075 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1076 EVP_DigestFinal(&md_ctx,q,
1077 (unsigned int *)&i);
1081 if (RSA_sign(NID_md5_sha1, md_buf, j,
1082 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1084 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1092 #if !defined(NO_DSA)
1093 if (pkey->type == EVP_PKEY_DSA)
1096 EVP_SignInit(&md_ctx,EVP_dss1());
1097 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1098 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1099 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1100 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1101 (unsigned int *)&i,pkey))
1103 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1112 /* Is this error check actually needed? */
1113 al=SSL_AD_HANDSHAKE_FAILURE;
1114 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1119 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1122 /* we should now have things packed up, so lets send
1128 s->state = SSL3_ST_SW_KEY_EXCH_B;
1129 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1131 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1136 static int ssl3_send_certificate_request(SSL *s)
1138 unsigned char *p,*d;
1140 STACK_OF(X509_NAME) *sk=NULL;
1144 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1148 d=p=(unsigned char *)&(buf->data[4]);
1150 /* get the list of acceptable cert types */
1152 n=ssl3_get_req_cert_type(s,p);
1161 sk=SSL_get_client_CA_list(s);
1165 for (i=0; i<sk_X509_NAME_num(sk); i++)
1167 name=sk_X509_NAME_value(sk,i);
1168 j=i2d_X509_NAME(name,NULL);
1169 if (!BUF_MEM_grow(buf,4+n+j+2))
1171 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1174 p=(unsigned char *)&(buf->data[4+n]);
1175 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1178 i2d_X509_NAME(name,&p);
1185 i2d_X509_NAME(name,&p);
1186 j-=2; s2n(j,d); j+=2;
1192 /* else no CA names */
1193 p=(unsigned char *)&(buf->data[4+off]);
1196 d=(unsigned char *)buf->data;
1197 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1200 /* we should now have things packed up, so lets send
1205 #ifdef NETSCAPE_HANG_BUG
1206 p=(unsigned char *)s->init_buf->data + s->init_num;
1209 *(p++)=SSL3_MT_SERVER_DONE;
1218 /* SSL3_ST_SW_CERT_REQ_B */
1219 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1224 static int ssl3_get_client_key_exchange(SSL *s)
1232 EVP_PKEY *pkey=NULL;
1239 n=ssl3_get_message(s,
1240 SSL3_ST_SR_KEY_EXCH_A,
1241 SSL3_ST_SR_KEY_EXCH_B,
1242 SSL3_MT_CLIENT_KEY_EXCHANGE,
1246 if (!ok) return((int)n);
1247 p=(unsigned char *)s->init_buf->data;
1249 l=s->s3->tmp.new_cipher->algorithms;
1254 /* FIX THIS UP EAY EAY EAY EAY */
1255 if (s->s3->tmp.use_rsa_tmp)
1257 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1258 rsa=s->cert->rsa_tmp;
1259 /* Don't do a callback because rsa_tmp should
1260 * be sent already */
1263 al=SSL_AD_HANDSHAKE_FAILURE;
1264 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1271 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1272 if ( (pkey == NULL) ||
1273 (pkey->type != EVP_PKEY_RSA) ||
1274 (pkey->pkey.rsa == NULL))
1276 al=SSL_AD_HANDSHAKE_FAILURE;
1277 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1284 if (s->version > SSL3_VERSION)
1289 if (!(s->options & SSL_OP_TLS_D5_BUG))
1291 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1301 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1304 /* If a bad decrypt, use a random master key */
1305 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1306 ((p[0] != (s->client_version>>8)) ||
1307 (p[1] != (s->client_version & 0xff))))
1311 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1312 (p[0] == (s->version>>8)) &&
1315 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1320 p[0]=(s->version>>8);
1321 p[1]=(s->version & 0xff);
1322 RAND_pseudo_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1323 i=SSL_MAX_MASTER_KEY_LENGTH;
1325 /* else, an SSLeay bug, ssl only server, tls client */
1328 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1330 al=SSL_AD_DECODE_ERROR;
1331 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1335 if ((p[0] != (s->client_version>>8)) || (p[1] != (s->client_version & 0xff)))
1337 al=SSL_AD_DECODE_ERROR;
1338 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1343 s->session->master_key_length=
1344 s->method->ssl3_enc->generate_master_secret(s,
1345 s->session->master_key,
1352 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1357 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1359 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1369 if (n == 0L) /* the parameters are in the cert */
1371 al=SSL_AD_HANDSHAKE_FAILURE;
1372 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1377 if (s->s3->tmp.dh == NULL)
1379 al=SSL_AD_HANDSHAKE_FAILURE;
1380 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1384 dh_srvr=s->s3->tmp.dh;
1387 pub=BN_bin2bn(p,i,NULL);
1390 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1394 i=DH_compute_key(p,pub,dh_srvr);
1398 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1402 DH_free(s->s3->tmp.dh);
1407 s->session->master_key_length=
1408 s->method->ssl3_enc->generate_master_secret(s,
1409 s->session->master_key,p,i);
1414 al=SSL_AD_HANDSHAKE_FAILURE;
1415 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1421 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1422 #if !defined(NO_DH) || !defined(NO_RSA)
1428 static int ssl3_get_cert_verify(SSL *s)
1430 EVP_PKEY *pkey=NULL;
1437 n=ssl3_get_message(s,
1438 SSL3_ST_SR_CERT_VRFY_A,
1439 SSL3_ST_SR_CERT_VRFY_B,
1444 if (!ok) return((int)n);
1446 if (s->session->peer != NULL)
1448 peer=s->session->peer;
1449 pkey=X509_get_pubkey(peer);
1450 type=X509_certificate_type(peer,pkey);
1458 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1460 s->s3->tmp.reuse_message=1;
1461 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1463 al=SSL_AD_UNEXPECTED_MESSAGE;
1464 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1473 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1474 al=SSL_AD_UNEXPECTED_MESSAGE;
1478 if (!(type & EVP_PKT_SIGN))
1480 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1481 al=SSL_AD_ILLEGAL_PARAMETER;
1485 if (s->s3->change_cipher_spec)
1487 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1488 al=SSL_AD_UNEXPECTED_MESSAGE;
1492 /* we now have a signature that we need to verify */
1493 p=(unsigned char *)s->init_buf->data;
1498 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1499 al=SSL_AD_DECODE_ERROR;
1503 j=EVP_PKEY_size(pkey);
1504 if ((i > j) || (n > j) || (n <= 0))
1506 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1507 al=SSL_AD_DECODE_ERROR;
1512 if (pkey->type == EVP_PKEY_RSA)
1514 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1515 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1519 al=SSL_AD_DECRYPT_ERROR;
1520 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1525 al=SSL_AD_DECRYPT_ERROR;
1526 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1533 if (pkey->type == EVP_PKEY_DSA)
1535 j=DSA_verify(pkey->save_type,
1536 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1537 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1541 al=SSL_AD_DECRYPT_ERROR;
1542 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1549 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1550 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1559 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1562 EVP_PKEY_free(pkey);
1566 static int ssl3_get_client_certificate(SSL *s)
1568 int i,ok,al,ret= -1;
1570 unsigned long l,nc,llen,n;
1571 unsigned char *p,*d,*q;
1572 STACK_OF(X509) *sk=NULL;
1574 n=ssl3_get_message(s,
1578 #if defined(MSDOS) && !defined(WIN32)
1579 1024*30, /* 30k max cert list :-) */
1581 1024*100, /* 100k max cert list :-) */
1585 if (!ok) return((int)n);
1587 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1589 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1590 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1592 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1593 al=SSL_AD_HANDSHAKE_FAILURE;
1596 /* If tls asked for a client cert, the client must return a 0 list */
1597 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1599 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1600 al=SSL_AD_UNEXPECTED_MESSAGE;
1603 s->s3->tmp.reuse_message=1;
1607 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1609 al=SSL_AD_UNEXPECTED_MESSAGE;
1610 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1613 d=p=(unsigned char *)s->init_buf->data;
1615 if ((sk=sk_X509_new_null()) == NULL)
1617 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1624 al=SSL_AD_DECODE_ERROR;
1625 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1628 for (nc=0; nc<llen; )
1631 if ((l+nc+3) > llen)
1633 al=SSL_AD_DECODE_ERROR;
1634 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1639 x=d2i_X509(NULL,&p,l);
1642 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1647 al=SSL_AD_DECODE_ERROR;
1648 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1651 if (!sk_X509_push(sk,x))
1653 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1660 if (sk_X509_num(sk) <= 0)
1662 /* TLS does not mind 0 certs returned */
1663 if (s->version == SSL3_VERSION)
1665 al=SSL_AD_HANDSHAKE_FAILURE;
1666 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1669 /* Fail for TLS only if we required a certificate */
1670 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1671 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1673 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1674 al=SSL_AD_HANDSHAKE_FAILURE;
1680 i=ssl_verify_cert_chain(s,sk);
1683 al=ssl_verify_alarm_type(s->verify_result);
1684 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1689 if (s->session->peer != NULL) /* This should not be needed */
1690 X509_free(s->session->peer);
1691 s->session->peer=sk_X509_shift(sk);
1692 s->session->verify_result = s->verify_result;
1694 /* With the current implementation, sess_cert will always be NULL
1695 * when we arrive here. */
1696 if (s->session->sess_cert == NULL)
1698 s->session->sess_cert = ssl_sess_cert_new();
1699 if (s->session->sess_cert == NULL)
1701 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1705 if (s->session->sess_cert->cert_chain != NULL)
1706 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1707 s->session->sess_cert->cert_chain=sk;
1715 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1718 if (x != NULL) X509_free(x);
1719 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1723 int ssl3_send_server_certificate(SSL *s)
1728 if (s->state == SSL3_ST_SW_CERT_A)
1730 x=ssl_get_server_send_cert(s);
1733 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1737 l=ssl3_output_cert_chain(s,x);
1738 s->state=SSL3_ST_SW_CERT_B;
1743 /* SSL3_ST_SW_CERT_B */
1744 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));