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.]
60 #ifndef OPENSSL_NO_SSL2
62 #include <openssl/bio.h>
63 #include <openssl/rand.h>
64 #include <openssl/objects.h>
65 #include <openssl/evp.h>
67 static SSL_METHOD *ssl2_get_server_method(int ver);
68 static int get_client_master_key(SSL *s);
69 static int get_client_hello(SSL *s);
70 static int server_hello(SSL *s);
71 static int get_client_finished(SSL *s);
72 static int server_verify(SSL *s);
73 static int server_finish(SSL *s);
74 static int request_certificate(SSL *s);
75 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
76 unsigned char *to,int padding);
79 static SSL_METHOD *ssl2_get_server_method(int ver)
81 if (ver == SSL2_VERSION)
82 return(SSLv2_server_method());
87 SSL_METHOD *SSLv2_server_method(void)
90 static SSL_METHOD SSLv2_server_data;
94 memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(),
96 SSLv2_server_data.ssl_accept=ssl2_accept;
97 SSLv2_server_data.get_ssl_method=ssl2_get_server_method;
100 return(&SSLv2_server_data);
103 int ssl2_accept(SSL *s)
105 unsigned long l=time(NULL);
112 RAND_add(&l,sizeof(l),0);
116 if (s->info_callback != NULL)
118 else if (s->ctx->info_callback != NULL)
119 cb=s->ctx->info_callback;
121 /* init things to blank */
123 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
127 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
140 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
141 case SSL_ST_OK|SSL_ST_ACCEPT:
144 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
146 s->version=SSL2_VERSION;
147 s->type=SSL_ST_ACCEPT;
150 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
151 { ret= -1; goto end; }
152 if (!BUF_MEM_grow(buf,(int)
153 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
154 { ret= -1; goto end; }
157 s->ctx->stats.sess_accept++;
158 s->handshake_func=ssl2_accept;
159 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
162 case SSL2_ST_GET_CLIENT_HELLO_A:
163 case SSL2_ST_GET_CLIENT_HELLO_B:
164 case SSL2_ST_GET_CLIENT_HELLO_C:
166 ret=get_client_hello(s);
167 if (ret <= 0) goto end;
169 s->state=SSL2_ST_SEND_SERVER_HELLO_A;
172 case SSL2_ST_SEND_SERVER_HELLO_A:
173 case SSL2_ST_SEND_SERVER_HELLO_B:
175 if (ret <= 0) goto end;
179 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
184 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
187 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
188 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
189 ret=get_client_master_key(s);
190 if (ret <= 0) goto end;
192 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
195 case SSL2_ST_SERVER_START_ENCRYPTION:
196 /* Ok we how have sent all the stuff needed to
197 * start encrypting, the next packet back will
199 if (!ssl2_enc_init(s,0))
200 { ret= -1; goto end; }
202 s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
205 case SSL2_ST_SEND_SERVER_VERIFY_A:
206 case SSL2_ST_SEND_SERVER_VERIFY_B:
207 ret=server_verify(s);
208 if (ret <= 0) goto end;
212 /* If we are in here, we have been
213 * buffering the output, so we need to
214 * flush it and remove buffering from
216 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
221 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
225 case SSL2_ST_SEND_SERVER_VERIFY_C:
226 /* get the number of bytes to write */
227 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
230 s->rwstate=SSL_WRITING;
231 num1=BIO_flush(s->wbio);
232 if (num1 <= 0) { ret= -1; goto end; }
233 s->rwstate=SSL_NOTHING;
236 /* flushed and now remove buffering */
237 s->wbio=BIO_pop(s->wbio);
239 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
242 case SSL2_ST_GET_CLIENT_FINISHED_A:
243 case SSL2_ST_GET_CLIENT_FINISHED_B:
244 ret=get_client_finished(s);
248 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
251 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
252 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
253 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
254 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
255 /* don't do a 'request certificate' if we
256 * don't want to, or we already have one, and
257 * we only want to do it once. */
258 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
259 ((s->session->peer != NULL) &&
260 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
262 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
267 ret=request_certificate(s);
268 if (ret <= 0) goto end;
270 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
274 case SSL2_ST_SEND_SERVER_FINISHED_A:
275 case SSL2_ST_SEND_SERVER_FINISHED_B:
276 ret=server_finish(s);
277 if (ret <= 0) goto end;
283 BUF_MEM_free(s->init_buf);
284 ssl_free_wbio_buffer(s);
287 /* ERR_clear_error();*/
289 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
291 s->ctx->stats.sess_accept_good++;
295 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
301 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
307 if ((cb != NULL) && (s->state != state))
311 cb(s,SSL_CB_ACCEPT_LOOP,1);
318 cb(s,SSL_CB_ACCEPT_EXIT,ret);
322 static int get_client_master_key(SSL *s)
324 int is_export,i,n,keya,ek;
330 p=(unsigned char *)s->init_buf->data;
331 if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
333 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
335 if (i < (10-s->init_num))
336 return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
337 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
339 if (p[-1] != SSL2_MT_ERROR)
341 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
342 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
345 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
350 cp=ssl2_get_cipher_by_char(p);
353 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
354 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
355 SSL_R_NO_CIPHER_MATCH);
358 s->session->cipher= cp;
361 n2s(p,i); s->s2->tmp.clear=i;
362 n2s(p,i); s->s2->tmp.enc=i;
363 n2s(p,i); s->session->key_arg_length=i;
364 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
368 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
369 p=(unsigned char *)s->init_buf->data;
370 keya=s->session->key_arg_length;
371 n=s->s2->tmp.clear+s->s2->tmp.enc+keya - s->init_num;
372 i=ssl2_read(s,(char *)&(p[s->init_num]),n);
373 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
375 memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
378 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
380 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
381 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
384 i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
385 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
386 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
388 is_export=SSL_C_IS_EXPORT(s->session->cipher);
390 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
392 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
393 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
397 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
407 /* If a bad decrypt, continue with protocol but with a
408 * random master secret (Bleichenbacher attack) */
410 ((!is_export && (i != EVP_CIPHER_key_length(c)))
411 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
412 EVP_CIPHER_key_length(c))))))
418 i=EVP_CIPHER_key_length(c);
419 RAND_pseudo_bytes(p,i);
425 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
427 /* incorrect number of key bytes for non export cipher */
428 else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
429 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
430 EVP_CIPHER_key_length(c)))))
433 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
437 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
442 if (is_export) i+=s->s2->tmp.clear;
443 s->session->master_key_length=i;
444 memcpy(s->session->master_key,p,(unsigned int)i);
448 static int get_client_hello(SSL *s)
452 STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
453 STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
454 STACK_OF(SSL_CIPHER) *prio, *allow;
457 /* This is a bit of a hack to check for the correct packet
458 * type the first time round. */
459 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
462 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
465 p=(unsigned char *)s->init_buf->data;
466 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
468 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
469 if (i < (9-s->init_num))
470 return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
472 if (*(p++) != SSL2_MT_CLIENT_HELLO)
474 if (p[-1] != SSL2_MT_ERROR)
476 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
477 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
480 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
484 if (i < s->version) s->version=i;
485 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
486 n2s(p,i); s->s2->tmp.session_id_length=i;
487 n2s(p,i); s->s2->challenge_length=i;
488 if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
489 (i > SSL2_MAX_CHALLENGE_LENGTH))
491 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
494 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
498 /* SSL2_ST_GET_CLIENT_HELLO_C */
499 p=(unsigned char *)s->init_buf->data;
500 n=s->s2->tmp.cipher_spec_length+s->s2->challenge_length+
501 s->s2->tmp.session_id_length-s->init_num;
502 i=ssl2_read(s,(char *)&(p[s->init_num]),n);
503 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
505 /* get session-id before cipher stuff so we can get out session
506 * structure if it is cached */
508 if ((s->s2->tmp.session_id_length != 0) &&
509 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
511 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
512 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
516 if (s->s2->tmp.session_id_length == 0)
518 if (!ssl_get_new_session(s,1))
520 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
526 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
527 s->s2->tmp.session_id_length);
529 { /* previous session */
534 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
541 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
542 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
546 if (!ssl_get_new_session(s,1))
548 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
556 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
557 &s->session->ciphers);
558 if (cs == NULL) goto mem_err;
560 cl=SSL_get_ciphers(s);
562 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
564 prio=sk_SSL_CIPHER_dup(cl);
565 if (prio == NULL) goto mem_err;
573 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
575 if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
577 sk_SSL_CIPHER_delete(prio,z);
581 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
583 sk_SSL_CIPHER_free(s->session->ciphers);
584 s->session->ciphers = prio;
586 /* s->session->ciphers should now have a list of
587 * ciphers that are on both the client and server.
588 * This list is ordered by the order the client sent
589 * the ciphers or in the order of the server's preference
590 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
593 p+=s->s2->tmp.cipher_spec_length;
594 /* done cipher selection */
596 /* session id extracted already */
597 p+=s->s2->tmp.session_id_length;
600 memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
603 SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
607 static int server_hello(SSL *s)
611 STACK_OF(SSL_CIPHER) *sk;
613 p=(unsigned char *)s->init_buf->data;
614 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
617 *(p++)=SSL2_MT_SERVER_HELLO; /* type */
619 *(p++)=(unsigned char)hit;
623 if (s->session->sess_cert != NULL)
624 /* This can't really happen because get_client_hello
625 * has called ssl_get_new_session, which does not set
627 ssl_sess_cert_free(s->session->sess_cert);
628 s->session->sess_cert = ssl_sess_cert_new();
629 if (s->session->sess_cert == NULL)
631 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
635 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
636 * depending on whether it survived in the internal cache
637 * or was retrieved from an external cache.
638 * If it is NULL, we cannot put any useful data in it anyway,
639 * so we don't touch it.
642 #else /* That's what used to be done when cert_st and sess_cert_st were
645 { /* else add cert to session */
646 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
647 if (s->session->sess_cert != NULL)
648 ssl_cert_free(s->session->sess_cert);
649 s->session->sess_cert=s->cert;
651 else /* We have a session id-cache hit, if the
652 * session-id has no certificate listed against
653 * the 'cert' structure, grab the 'old' one
654 * listed against the SSL connection */
656 if (s->session->sess_cert == NULL)
658 CRYPTO_add(&s->cert->references,1,
659 CRYPTO_LOCK_SSL_CERT);
660 s->session->sess_cert=s->cert;
667 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
668 SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
674 *(p++)=0; /* no certificate type */
675 s2n(s->version,p); /* version */
676 s2n(0,p); /* cert len */
677 s2n(0,p); /* ciphers len */
682 /* put certificate type */
683 *(p++)=SSL2_CT_X509_CERTIFICATE;
684 s2n(s->version,p); /* version */
685 n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
686 s2n(n,p); /* certificate length */
687 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
690 /* lets send out the ciphers we like in the
692 sk= s->session->ciphers;
693 n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
695 s2n(n,p); /* add cipher length */
698 /* make and send conn_id */
699 s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
700 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
701 RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
702 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
703 d+=SSL2_CONNECTION_ID_LENGTH;
705 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
706 s->init_num=d-(unsigned char *)s->init_buf->data;
709 /* SSL2_ST_SEND_SERVER_HELLO_B */
710 /* If we are using TCP/IP, the performance is bad if we do 2
711 * writes without a read between them. This occurs when
712 * Session-id reuse is used, so I will put in a buffering module
716 if (!ssl_init_wbio_buffer(s,1)) return(-1);
719 return(ssl2_do_write(s));
722 static int get_client_finished(SSL *s)
727 p=(unsigned char *)s->init_buf->data;
728 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
730 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
731 if (i < 1-s->init_num)
732 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
734 if (*p != SSL2_MT_CLIENT_FINISHED)
736 if (*p != SSL2_MT_ERROR)
738 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
739 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
742 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
746 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
749 /* SSL2_ST_GET_CLIENT_FINISHED_B */
750 i=ssl2_read(s,(char *)&(p[s->init_num]),s->s2->conn_id_length-s->init_num);
751 if (i < (int)s->s2->conn_id_length-s->init_num)
753 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
755 if (memcmp(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length) != 0)
757 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
758 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
764 static int server_verify(SSL *s)
768 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
770 p=(unsigned char *)s->init_buf->data;
771 *(p++)=SSL2_MT_SERVER_VERIFY;
772 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
773 /* p+=s->s2->challenge_length; */
775 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
776 s->init_num=s->s2->challenge_length+1;
779 return(ssl2_do_write(s));
782 static int server_finish(SSL *s)
786 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
788 p=(unsigned char *)s->init_buf->data;
789 *(p++)=SSL2_MT_SERVER_FINISHED;
791 memcpy(p,s->session->session_id,
792 (unsigned int)s->session->session_id_length);
793 /* p+=s->session->session_id_length; */
795 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
796 s->init_num=s->session->session_id_length+1;
800 /* SSL2_ST_SEND_SERVER_FINISHED_B */
801 return(ssl2_do_write(s));
804 /* send the request and check the response */
805 static int request_certificate(SSL *s)
807 unsigned char *p,*p2,*buf2;
809 int i,j,ctype,ret= -1;
811 STACK_OF(X509) *sk=NULL;
814 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
816 p=(unsigned char *)s->init_buf->data;
817 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
818 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
819 RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
820 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
822 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
823 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
827 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
837 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
840 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
842 p=(unsigned char *)s->init_buf->data;
843 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num);
846 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
850 if ((*p == SSL2_MT_ERROR) && (i >= 3))
853 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
855 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
856 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
862 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (i < 6))
864 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
865 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
868 /* ok we have a response */
869 /* certificate type, there is only one right now. */
871 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
873 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
874 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
877 n2s(p,i); s->s2->tmp.clen=i;
878 n2s(p,i); s->s2->tmp.rlen=i;
879 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
883 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
884 p=(unsigned char *)s->init_buf->data;
885 j=s->s2->tmp.clen+s->s2->tmp.rlen-s->init_num;
886 i=ssl2_read(s,(char *)&(p[s->init_num]),j);
889 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
893 x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
896 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
900 if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
902 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
906 i=ssl_verify_cert_chain(s,sk);
908 if (i) /* we like the packet, now check the chksum */
913 EVP_MD_CTX_init(&ctx);
914 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
915 EVP_VerifyUpdate(&ctx,s->s2->key_material,
916 (unsigned int)s->s2->key_material_length);
917 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
919 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
920 buf2=OPENSSL_malloc((unsigned int)i);
923 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
927 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
928 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
931 pkey=X509_get_pubkey(x509);
932 if (pkey == NULL) goto end;
933 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
935 EVP_MD_CTX_cleanup(&ctx);
939 if (s->session->peer != NULL)
940 X509_free(s->session->peer);
941 s->session->peer=x509;
942 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
943 s->session->verify_result = s->verify_result;
949 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
956 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
964 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
965 unsigned char *to, int padding)
970 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
972 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
975 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
977 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
980 rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
982 /* we have the public key */
983 i=RSA_private_decrypt(len,from,to,rsa,padding);
985 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
988 #else /* !OPENSSL_NO_SSL2 */
991 static void *dummy=&dummy;