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; */
147 case SSL3_ST_SR_MS_SGC:
150 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
151 case SSL_ST_OK|SSL_ST_ACCEPT:
154 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
156 if ((s->version>>8) != 3)
158 /* s->version=SSL3_VERSION; */
159 s->type=SSL_ST_ACCEPT;
161 if (s->init_buf == NULL)
163 if ((buf=BUF_MEM_new()) == NULL)
168 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
176 if (!ssl3_setup_buffers(s))
182 /* Ok, we now need to push on a buffering BIO so that
183 * the output is sent in a way that TCP likes :-)
185 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
189 if (s->state != SSL_ST_RENEGOTIATE)
191 if(s->state != SSL3_ST_SR_MS_SGC) ssl3_init_finished_mac(s);
192 s->state=SSL3_ST_SR_CLNT_HELLO_A;
193 s->ctx->stats.sess_accept++;
197 s->ctx->stats.sess_accept_renegotiate++;
198 s->state=SSL3_ST_SW_HELLO_REQ_A;
202 case SSL3_ST_SW_HELLO_REQ_A:
203 case SSL3_ST_SW_HELLO_REQ_B:
206 ret=ssl3_send_hello_request(s);
207 if (ret <= 0) goto end;
208 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
209 s->state=SSL3_ST_SW_FLUSH;
212 ssl3_init_finished_mac(s);
215 case SSL3_ST_SW_HELLO_REQ_C:
221 case SSL3_ST_SR_CLNT_HELLO_A:
222 case SSL3_ST_SR_CLNT_HELLO_B:
223 case SSL3_ST_SR_CLNT_HELLO_C:
226 ret=ssl3_get_client_hello(s);
227 if (ret <= 0) goto end;
228 s->state=SSL3_ST_SW_SRVR_HELLO_A;
232 case SSL3_ST_SW_SRVR_HELLO_A:
233 case SSL3_ST_SW_SRVR_HELLO_B:
234 ret=ssl3_send_server_hello(s);
235 if (ret <= 0) goto end;
238 s->state=SSL3_ST_SW_CHANGE_A;
240 s->state=SSL3_ST_SW_CERT_A;
244 case SSL3_ST_SW_CERT_A:
245 case SSL3_ST_SW_CERT_B:
246 /* Check if it is anon DH */
247 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
249 ret=ssl3_send_server_certificate(s);
250 if (ret <= 0) goto end;
254 s->state=SSL3_ST_SW_KEY_EXCH_A;
258 case SSL3_ST_SW_KEY_EXCH_A:
259 case SSL3_ST_SW_KEY_EXCH_B:
260 l=s->s3->tmp.new_cipher->algorithms;
262 /* clear this, it may get reset by
263 * send_server_key_exchange */
264 if (s->options & SSL_OP_EPHEMERAL_RSA)
265 s->s3->tmp.use_rsa_tmp=1;
267 s->s3->tmp.use_rsa_tmp=0;
269 /* only send if a DH key exchange, fortezza or
270 * RSA but we have a sign only certificate */
271 if (s->s3->tmp.use_rsa_tmp
272 || (l & (SSL_DH|SSL_kFZA))
274 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
275 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
276 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
282 ret=ssl3_send_server_key_exchange(s);
283 if (ret <= 0) goto end;
288 s->state=SSL3_ST_SW_CERT_REQ_A;
292 case SSL3_ST_SW_CERT_REQ_A:
293 case SSL3_ST_SW_CERT_REQ_B:
294 if (/* don't request cert unless asked for it: */
295 !(s->verify_mode & SSL_VERIFY_PEER) ||
296 /* if SSL_VERIFY_CLIENT_ONCE is set,
297 * don't request cert during re-negotiation: */
298 ((s->session->peer != NULL) &&
299 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
300 /* never request cert in anonymous ciphersuites
301 * (see section "Certificate request" in SSL 3 drafts
302 * and in RFC 2246): */
303 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
304 /* ... except when the application insists on verification
305 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
306 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)))
308 /* no cert request */
310 s->s3->tmp.cert_request=0;
311 s->state=SSL3_ST_SW_SRVR_DONE_A;
315 s->s3->tmp.cert_request=1;
316 ret=ssl3_send_certificate_request(s);
317 if (ret <= 0) goto end;
318 #ifndef NETSCAPE_HANG_BUG
319 s->state=SSL3_ST_SW_SRVR_DONE_A;
321 s->state=SSL3_ST_SW_FLUSH;
322 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
328 case SSL3_ST_SW_SRVR_DONE_A:
329 case SSL3_ST_SW_SRVR_DONE_B:
330 ret=ssl3_send_server_done(s);
331 if (ret <= 0) goto end;
332 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
333 s->state=SSL3_ST_SW_FLUSH;
337 case SSL3_ST_SW_FLUSH:
338 /* number of bytes to be flushed */
339 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
342 s->rwstate=SSL_WRITING;
343 num1=BIO_flush(s->wbio);
344 if (num1 <= 0) { ret= -1; goto end; }
345 s->rwstate=SSL_NOTHING;
348 s->state=s->s3->tmp.next_state;
351 case SSL3_ST_SR_CERT_A:
352 case SSL3_ST_SR_CERT_B:
353 /* Check for second client hello if MS SGC */
354 ret = ssl3_check_client_hello(s);
355 if(ret <= 0) goto end;
356 if(ret == 2) s->state = SSL3_ST_SR_MS_SGC;
358 /* could be sent for a DH cert, even if we
359 * have not asked for it :-) */
360 ret=ssl3_get_client_certificate(s);
361 if (ret <= 0) goto end;
363 s->state=SSL3_ST_SR_KEY_EXCH_A;
367 case SSL3_ST_SR_KEY_EXCH_A:
368 case SSL3_ST_SR_KEY_EXCH_B:
369 ret=ssl3_get_client_key_exchange(s);
370 if (ret <= 0) goto end;
371 s->state=SSL3_ST_SR_CERT_VRFY_A;
374 /* We need to get hashes here so if there is
375 * a client cert, it can be verified */
376 s->method->ssl3_enc->cert_verify_mac(s,
377 &(s->s3->finish_dgst1),
378 &(s->s3->tmp.cert_verify_md[0]));
379 s->method->ssl3_enc->cert_verify_mac(s,
380 &(s->s3->finish_dgst2),
381 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
385 case SSL3_ST_SR_CERT_VRFY_A:
386 case SSL3_ST_SR_CERT_VRFY_B:
388 /* we should decide if we expected this one */
389 ret=ssl3_get_cert_verify(s);
390 if (ret <= 0) goto end;
392 s->state=SSL3_ST_SR_FINISHED_A;
396 case SSL3_ST_SR_FINISHED_A:
397 case SSL3_ST_SR_FINISHED_B:
398 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
399 SSL3_ST_SR_FINISHED_B);
400 if (ret <= 0) goto end;
404 s->state=SSL3_ST_SW_CHANGE_A;
408 case SSL3_ST_SW_CHANGE_A:
409 case SSL3_ST_SW_CHANGE_B:
411 s->session->cipher=s->s3->tmp.new_cipher;
412 if (!s->method->ssl3_enc->setup_key_block(s))
413 { ret= -1; goto end; }
415 ret=ssl3_send_change_cipher_spec(s,
416 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
418 if (ret <= 0) goto end;
419 s->state=SSL3_ST_SW_FINISHED_A;
422 if (!s->method->ssl3_enc->change_cipher_state(s,
423 SSL3_CHANGE_CIPHER_SERVER_WRITE))
431 case SSL3_ST_SW_FINISHED_A:
432 case SSL3_ST_SW_FINISHED_B:
433 ret=ssl3_send_finished(s,
434 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
435 s->method->ssl3_enc->server_finished_label,
436 s->method->ssl3_enc->server_finished_label_len);
437 if (ret <= 0) goto end;
438 s->state=SSL3_ST_SW_FLUSH;
440 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
442 s->s3->tmp.next_state=SSL_ST_OK;
447 /* clean a few things up */
448 ssl3_cleanup_key_block(s);
450 BUF_MEM_free(s->init_buf);
453 /* remove buffering on output */
454 ssl_free_wbio_buffer(s);
459 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
461 s->ctx->stats.sess_accept_good++;
463 s->handshake_func=ssl3_accept;
466 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
472 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
478 if (!s->s3->tmp.reuse_message && !skip)
482 if ((ret=BIO_flush(s->wbio)) <= 0)
487 if ((cb != NULL) && (s->state != state))
491 cb(s,SSL_CB_ACCEPT_LOOP,1);
498 /* BIO_flush(s->wbio); */
501 cb(s,SSL_CB_ACCEPT_EXIT,ret);
506 static int ssl3_send_hello_request(SSL *s)
510 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
512 p=(unsigned char *)s->init_buf->data;
513 *(p++)=SSL3_MT_HELLO_REQUEST;
518 s->state=SSL3_ST_SW_HELLO_REQ_B;
519 /* number of bytes to write */
524 /* SSL3_ST_SW_HELLO_REQ_B */
525 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
528 static int ssl3_check_client_hello(SSL *s)
533 n=ssl3_get_message(s,
537 SSL3_RT_MAX_PLAIN_LENGTH,
539 if (!ok) return((int)n);
540 s->s3->tmp.reuse_message = 1;
541 if(s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) return 2;
545 static int ssl3_get_client_hello(SSL *s)
547 int i,j,ok,al,ret= -1;
550 unsigned char *p,*d,*q;
553 STACK_OF(SSL_CIPHER) *ciphers=NULL;
555 /* We do this so that we will respond with our native type.
556 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
557 * This down switching should be handled by a different method.
558 * If we are SSLv3, we will respond with SSLv3, even if prompted with
561 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
564 s->state=SSL3_ST_SR_CLNT_HELLO_B;
566 n=ssl3_get_message(s,
567 SSL3_ST_SR_CLNT_HELLO_B,
568 SSL3_ST_SR_CLNT_HELLO_C,
569 SSL3_MT_CLIENT_HELLO,
570 SSL3_RT_MAX_PLAIN_LENGTH,
573 if (!ok) return((int)n);
574 d=p=(unsigned char *)s->init_buf->data;
576 /* use version from inside client hello, not from record header
577 * (may differ: see RFC 2246, Appendix E, second paragraph) */
578 s->client_version=(((int)p[0])<<8)|(int)p[1];
581 /* load the client random */
582 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
585 /* get the session-id */
591 if (!ssl_get_new_session(s,1))
596 i=ssl_get_prev_session(s,p,j);
598 { /* previous session */
605 if (!ssl_get_new_session(s,1))
612 if ((i == 0) && (j != 0))
614 /* we need a cipher if we are not resuming a session */
615 al=SSL_AD_ILLEGAL_PARAMETER;
616 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
621 /* not enough data */
622 al=SSL_AD_DECODE_ERROR;
623 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
626 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
633 /* If it is a hit, check that the cipher is in the list */
634 if ((s->hit) && (i > 0))
637 id=s->session->cipher->id;
640 printf("client sent %d ciphers\n",sk_num(ciphers));
642 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
644 c=sk_SSL_CIPHER_value(ciphers,i);
646 printf("client [%2d of %2d]:%s\n",
647 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
657 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
659 /* Very bad for multi-threading.... */
660 s->session->cipher=sk_SSL_CIPHER_value(ciphers,
665 /* we need to have the cipher in the cipher
666 * list if we are asked to reuse it */
667 al=SSL_AD_ILLEGAL_PARAMETER;
668 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
679 if (p[j] == 0) break;
686 al=SSL_AD_DECODE_ERROR;
687 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
691 /* Worst case, we will use the NULL compression, but if we have other
692 * options, we will now look for them. We have i-1 compression
693 * algorithms from the client, starting at q. */
694 s->s3->tmp.new_compression=NULL;
695 if (s->ctx->comp_methods != NULL)
696 { /* See if we have a match */
699 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
702 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
715 s->s3->tmp.new_compression=comp;
720 /* TLS does not mind if there is extra stuff */
721 if (s->version == SSL3_VERSION)
725 /* wrong number of bytes,
726 * there could be more to follow */
727 al=SSL_AD_DECODE_ERROR;
728 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
733 /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must
738 s->session->compress_meth=(comp == NULL)?0:comp->id;
739 if (s->session->ciphers != NULL)
740 sk_SSL_CIPHER_free(s->session->ciphers);
741 s->session->ciphers=ciphers;
744 al=SSL_AD_ILLEGAL_PARAMETER;
745 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
749 c=ssl3_choose_cipher(s,s->session->ciphers,
750 ssl_get_ciphers_by_id(s));
754 al=SSL_AD_HANDSHAKE_FAILURE;
755 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
758 s->s3->tmp.new_cipher=c;
762 /* Session-id reuse */
763 #ifdef REUSE_CIPHER_BUG
764 STACK_OF(SSL_CIPHER) *sk;
768 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
770 sk=s->session->ciphers;
771 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
773 c=sk_SSL_CIPHER_value(sk,i);
774 if (c->algorithms & SSL_eNULL)
776 if (SSL_C_IS_EXPORT(c))
780 s->s3->tmp.new_cipher=nc;
782 s->s3->tmp.new_cipher=ec;
784 s->s3->tmp.new_cipher=s->session->cipher;
788 s->s3->tmp.new_cipher=s->session->cipher;
791 /* we now have the following setup.
793 * cipher_list - our prefered list of ciphers
794 * ciphers - the clients prefered list of ciphers
795 * compression - basically ignored right now
796 * ssl version is set - sslv3
797 * s->session - The ssl session has been setup.
798 * s->hit - session reuse flag
799 * s->tmp.new_cipher - the new cipher to use.
806 ssl3_send_alert(s,SSL3_AL_FATAL,al);
809 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
813 static int ssl3_send_server_hello(SSL *s)
818 unsigned long l,Time;
820 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
822 buf=(unsigned char *)s->init_buf->data;
823 p=s->s3->server_random;
824 Time=time(NULL); /* Time */
826 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
827 /* Do the message type and length last */
830 *(p++)=s->version>>8;
831 *(p++)=s->version&0xff;
834 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
837 /* now in theory we have 3 options to sending back the
838 * session id. If it is a re-use, we send back the
839 * old session-id, if it is a new session, we send
840 * back the new session-id or we send back a 0 length
841 * session-id if we want it to be single use.
842 * Currently I will not implement the '0' length session-id
843 * 12-Jan-98 - I'll now support the '0' length stuff.
845 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
846 s->session->session_id_length=0;
848 sl=s->session->session_id_length;
850 memcpy(p,s->session->session_id,sl);
854 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
857 /* put the compression method */
858 if (s->s3->tmp.new_compression == NULL)
861 *(p++)=s->s3->tmp.new_compression->id;
866 *(d++)=SSL3_MT_SERVER_HELLO;
869 s->state=SSL3_ST_CW_CLNT_HELLO_B;
870 /* number of bytes to write */
875 /* SSL3_ST_CW_CLNT_HELLO_B */
876 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
879 static int ssl3_send_server_done(SSL *s)
883 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
885 p=(unsigned char *)s->init_buf->data;
888 *(p++)=SSL3_MT_SERVER_DONE;
893 s->state=SSL3_ST_SW_SRVR_DONE_B;
894 /* number of bytes to write */
899 /* SSL3_ST_CW_CLNT_HELLO_B */
900 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
903 static int ssl3_send_server_key_exchange(SSL *s)
909 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
926 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
928 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
933 r[0]=r[1]=r[2]=r[3]=NULL;
939 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
941 rsa=s->cert->rsa_tmp_cb(s,
942 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
943 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
944 CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA);
949 al=SSL_AD_HANDSHAKE_FAILURE;
950 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
955 s->s3->tmp.use_rsa_tmp=1;
963 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
964 dhp=s->cert->dh_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_MISSING_TMP_DH_KEY);
974 if (s->s3->tmp.dh != NULL)
977 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, SSL_R_INTERNAL_ERROR);
981 if ((dh=DHparams_dup(dhp)) == NULL)
983 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
988 if ((dhp->pub_key == NULL ||
989 dhp->priv_key == NULL ||
990 (s->options & SSL_OP_SINGLE_DH_USE)))
992 if(!DH_generate_key(dh))
994 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1001 dh->pub_key=BN_dup(dhp->pub_key);
1002 dh->priv_key=BN_dup(dhp->priv_key);
1003 if ((dh->pub_key == NULL) ||
1004 (dh->priv_key == NULL))
1006 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1017 al=SSL_AD_HANDSHAKE_FAILURE;
1018 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1021 for (i=0; r[i] != NULL; i++)
1023 nr[i]=BN_num_bytes(r[i]);
1027 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1029 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1032 al=SSL_AD_DECODE_ERROR;
1035 kn=EVP_PKEY_size(pkey);
1043 if (!BUF_MEM_grow(buf,n+4+kn))
1045 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1048 d=(unsigned char *)s->init_buf->data;
1051 for (i=0; r[i] != NULL; i++)
1061 /* n is the length of the params, they start at &(d[4])
1062 * and p points to the space at the end. */
1064 if (pkey->type == EVP_PKEY_RSA)
1068 for (num=2; num > 0; num--)
1070 EVP_DigestInit(&md_ctx,(num == 2)
1071 ?s->ctx->md5:s->ctx->sha1);
1072 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1073 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1074 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1075 EVP_DigestFinal(&md_ctx,q,
1076 (unsigned int *)&i);
1080 if (RSA_sign(NID_md5_sha1, md_buf, j,
1081 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1083 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1091 #if !defined(NO_DSA)
1092 if (pkey->type == EVP_PKEY_DSA)
1095 EVP_SignInit(&md_ctx,EVP_dss1());
1096 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1097 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1098 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1099 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1100 (unsigned int *)&i,pkey))
1102 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1111 /* Is this error check actually needed? */
1112 al=SSL_AD_HANDSHAKE_FAILURE;
1113 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1118 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1121 /* we should now have things packed up, so lets send
1127 s->state = SSL3_ST_SW_KEY_EXCH_B;
1128 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1130 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1135 static int ssl3_send_certificate_request(SSL *s)
1137 unsigned char *p,*d;
1139 STACK_OF(X509_NAME) *sk=NULL;
1143 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1147 d=p=(unsigned char *)&(buf->data[4]);
1149 /* get the list of acceptable cert types */
1151 n=ssl3_get_req_cert_type(s,p);
1160 sk=SSL_get_client_CA_list(s);
1164 for (i=0; i<sk_X509_NAME_num(sk); i++)
1166 name=sk_X509_NAME_value(sk,i);
1167 j=i2d_X509_NAME(name,NULL);
1168 if (!BUF_MEM_grow(buf,4+n+j+2))
1170 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1173 p=(unsigned char *)&(buf->data[4+n]);
1174 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1177 i2d_X509_NAME(name,&p);
1184 i2d_X509_NAME(name,&p);
1185 j-=2; s2n(j,d); j+=2;
1191 /* else no CA names */
1192 p=(unsigned char *)&(buf->data[4+off]);
1195 d=(unsigned char *)buf->data;
1196 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1199 /* we should now have things packed up, so lets send
1204 #ifdef NETSCAPE_HANG_BUG
1205 p=(unsigned char *)s->init_buf->data + s->init_num;
1208 *(p++)=SSL3_MT_SERVER_DONE;
1217 /* SSL3_ST_SW_CERT_REQ_B */
1218 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1223 static int ssl3_get_client_key_exchange(SSL *s)
1231 EVP_PKEY *pkey=NULL;
1238 n=ssl3_get_message(s,
1239 SSL3_ST_SR_KEY_EXCH_A,
1240 SSL3_ST_SR_KEY_EXCH_B,
1241 SSL3_MT_CLIENT_KEY_EXCHANGE,
1245 if (!ok) return((int)n);
1246 p=(unsigned char *)s->init_buf->data;
1248 l=s->s3->tmp.new_cipher->algorithms;
1253 /* FIX THIS UP EAY EAY EAY EAY */
1254 if (s->s3->tmp.use_rsa_tmp)
1256 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1257 rsa=s->cert->rsa_tmp;
1258 /* Don't do a callback because rsa_tmp should
1259 * be sent already */
1262 al=SSL_AD_HANDSHAKE_FAILURE;
1263 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1270 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1271 if ( (pkey == NULL) ||
1272 (pkey->type != EVP_PKEY_RSA) ||
1273 (pkey->pkey.rsa == NULL))
1275 al=SSL_AD_HANDSHAKE_FAILURE;
1276 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1283 if (s->version > SSL3_VERSION)
1288 if (!(s->options & SSL_OP_TLS_D5_BUG))
1290 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1300 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1303 /* If a bad decrypt, use a random master key */
1304 if ((i != SSL_MAX_MASTER_KEY_LENGTH) ||
1305 ((p[0] != (s->client_version>>8)) ||
1306 (p[1] != (s->client_version & 0xff))))
1310 if ((i == SSL_MAX_MASTER_KEY_LENGTH) &&
1311 (p[0] == (s->version>>8)) &&
1314 if (s->options & SSL_OP_TLS_ROLLBACK_BUG)
1319 p[0]=(s->version>>8);
1320 p[1]=(s->version & 0xff);
1321 RAND_pseudo_bytes(&(p[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1322 i=SSL_MAX_MASTER_KEY_LENGTH;
1324 /* else, an SSLeay bug, ssl only server, tls client */
1327 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1329 al=SSL_AD_DECODE_ERROR;
1330 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1334 if ((p[0] != (s->client_version>>8)) || (p[1] != (s->client_version & 0xff)))
1336 al=SSL_AD_DECODE_ERROR;
1337 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1342 s->session->master_key_length=
1343 s->method->ssl3_enc->generate_master_secret(s,
1344 s->session->master_key,
1351 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1356 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1358 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1368 if (n == 0L) /* the parameters are in the cert */
1370 al=SSL_AD_HANDSHAKE_FAILURE;
1371 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1376 if (s->s3->tmp.dh == NULL)
1378 al=SSL_AD_HANDSHAKE_FAILURE;
1379 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1383 dh_srvr=s->s3->tmp.dh;
1386 pub=BN_bin2bn(p,i,NULL);
1389 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1393 i=DH_compute_key(p,pub,dh_srvr);
1397 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1401 DH_free(s->s3->tmp.dh);
1406 s->session->master_key_length=
1407 s->method->ssl3_enc->generate_master_secret(s,
1408 s->session->master_key,p,i);
1413 al=SSL_AD_HANDSHAKE_FAILURE;
1414 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE);
1420 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1421 #if !defined(NO_DH) || !defined(NO_RSA)
1427 static int ssl3_get_cert_verify(SSL *s)
1429 EVP_PKEY *pkey=NULL;
1436 n=ssl3_get_message(s,
1437 SSL3_ST_SR_CERT_VRFY_A,
1438 SSL3_ST_SR_CERT_VRFY_B,
1443 if (!ok) return((int)n);
1445 if (s->session->peer != NULL)
1447 peer=s->session->peer;
1448 pkey=X509_get_pubkey(peer);
1449 type=X509_certificate_type(peer,pkey);
1457 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
1459 s->s3->tmp.reuse_message=1;
1460 if ((peer != NULL) && (type | EVP_PKT_SIGN))
1462 al=SSL_AD_UNEXPECTED_MESSAGE;
1463 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
1472 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
1473 al=SSL_AD_UNEXPECTED_MESSAGE;
1477 if (!(type & EVP_PKT_SIGN))
1479 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
1480 al=SSL_AD_ILLEGAL_PARAMETER;
1484 if (s->s3->change_cipher_spec)
1486 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
1487 al=SSL_AD_UNEXPECTED_MESSAGE;
1491 /* we now have a signature that we need to verify */
1492 p=(unsigned char *)s->init_buf->data;
1497 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
1498 al=SSL_AD_DECODE_ERROR;
1502 j=EVP_PKEY_size(pkey);
1503 if ((i > j) || (n > j) || (n <= 0))
1505 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
1506 al=SSL_AD_DECODE_ERROR;
1511 if (pkey->type == EVP_PKEY_RSA)
1513 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
1514 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
1518 al=SSL_AD_DECRYPT_ERROR;
1519 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
1524 al=SSL_AD_DECRYPT_ERROR;
1525 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
1532 if (pkey->type == EVP_PKEY_DSA)
1534 j=DSA_verify(pkey->save_type,
1535 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
1536 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
1540 al=SSL_AD_DECRYPT_ERROR;
1541 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
1548 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR);
1549 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
1558 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1561 EVP_PKEY_free(pkey);
1565 static int ssl3_get_client_certificate(SSL *s)
1567 int i,ok,al,ret= -1;
1569 unsigned long l,nc,llen,n;
1570 unsigned char *p,*d,*q;
1571 STACK_OF(X509) *sk=NULL;
1573 n=ssl3_get_message(s,
1577 #if defined(MSDOS) && !defined(WIN32)
1578 1024*30, /* 30k max cert list :-) */
1580 1024*100, /* 100k max cert list :-) */
1584 if (!ok) return((int)n);
1586 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
1588 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
1589 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1591 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1592 al=SSL_AD_HANDSHAKE_FAILURE;
1595 /* If tls asked for a client cert, the client must return a 0 list */
1596 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
1598 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
1599 al=SSL_AD_UNEXPECTED_MESSAGE;
1602 s->s3->tmp.reuse_message=1;
1606 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1608 al=SSL_AD_UNEXPECTED_MESSAGE;
1609 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
1612 d=p=(unsigned char *)s->init_buf->data;
1614 if ((sk=sk_X509_new_null()) == NULL)
1616 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1623 al=SSL_AD_DECODE_ERROR;
1624 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1627 for (nc=0; nc<llen; )
1630 if ((l+nc+3) > llen)
1632 al=SSL_AD_DECODE_ERROR;
1633 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1638 x=d2i_X509(NULL,&p,l);
1641 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
1646 al=SSL_AD_DECODE_ERROR;
1647 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1650 if (!sk_X509_push(sk,x))
1652 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1659 if (sk_X509_num(sk) <= 0)
1661 /* TLS does not mind 0 certs returned */
1662 if (s->version == SSL3_VERSION)
1664 al=SSL_AD_HANDSHAKE_FAILURE;
1665 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
1668 /* Fail for TLS only if we required a certificate */
1669 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
1670 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
1672 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1673 al=SSL_AD_HANDSHAKE_FAILURE;
1679 i=ssl_verify_cert_chain(s,sk);
1682 al=ssl_verify_alarm_type(s->verify_result);
1683 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
1688 if (s->session->peer != NULL) /* This should not be needed */
1689 X509_free(s->session->peer);
1690 s->session->peer=sk_X509_shift(sk);
1691 s->session->verify_result = s->verify_result;
1693 /* With the current implementation, sess_cert will always be NULL
1694 * when we arrive here. */
1695 if (s->session->sess_cert == NULL)
1697 s->session->sess_cert = ssl_sess_cert_new();
1698 if (s->session->sess_cert == NULL)
1700 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1704 if (s->session->sess_cert->cert_chain != NULL)
1705 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
1706 s->session->sess_cert->cert_chain=sk;
1714 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1717 if (x != NULL) X509_free(x);
1718 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
1722 int ssl3_send_server_certificate(SSL *s)
1727 if (s->state == SSL3_ST_SW_CERT_A)
1729 x=ssl_get_server_send_cert(s);
1732 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR);
1736 l=ssl3_output_cert_chain(s,x);
1737 s->state=SSL3_ST_SW_CERT_B;
1742 /* SSL3_ST_SW_CERT_B */
1743 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));