/* ssl/s2_clnt.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include "ssl_locl.h" #ifndef NO_SSL2 #include #include #include #include #include #include "cryptlib.h" static SSL_METHOD *ssl2_get_client_method(int ver); static int get_server_finished(SSL *s); static int get_server_verify(SSL *s); static int get_server_hello(SSL *s); static int client_hello(SSL *s); static int client_master_key(SSL *s); static int client_finished(SSL *s); static int client_certificate(SSL *s); static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, unsigned char *to,int padding); #define BREAK break static SSL_METHOD *ssl2_get_client_method(int ver) { if (ver == SSL2_VERSION) return(SSLv2_client_method()); else return(NULL); } SSL_METHOD *SSLv2_client_method(void) { static int init=1; static SSL_METHOD SSLv2_client_data; if (init) { CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD); if (init) { memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(), sizeof(SSL_METHOD)); SSLv2_client_data.ssl_connect=ssl2_connect; SSLv2_client_data.get_ssl_method=ssl2_get_client_method; init=0; } CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD); } return(&SSLv2_client_data); } int ssl2_connect(SSL *s) { unsigned long l=time(NULL); BUF_MEM *buf=NULL; int ret= -1; void (*cb)()=NULL; int new_state,state; RAND_add(&l,sizeof(l),0); ERR_clear_error(); clear_sys_error(); if (s->info_callback != NULL) cb=s->info_callback; else if (s->ctx->info_callback != NULL) cb=s->ctx->info_callback; /* init things to blank */ s->in_handshake++; if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); for (;;) { state=s->state; switch (s->state) { case SSL_ST_BEFORE: case SSL_ST_CONNECT: case SSL_ST_BEFORE|SSL_ST_CONNECT: case SSL_ST_OK|SSL_ST_CONNECT: s->server=0; if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); s->version=SSL2_VERSION; s->type=SSL_ST_CONNECT; buf=s->init_buf; if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) { ret= -1; goto end; } if (!BUF_MEM_grow(buf, SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { ret= -1; goto end; } s->init_buf=buf; s->init_num=0; s->state=SSL2_ST_SEND_CLIENT_HELLO_A; s->ctx->stats.sess_connect++; s->handshake_func=ssl2_connect; BREAK; case SSL2_ST_SEND_CLIENT_HELLO_A: case SSL2_ST_SEND_CLIENT_HELLO_B: s->shutdown=0; ret=client_hello(s); if (ret <= 0) goto end; s->init_num=0; s->state=SSL2_ST_GET_SERVER_HELLO_A; BREAK; case SSL2_ST_GET_SERVER_HELLO_A: case SSL2_ST_GET_SERVER_HELLO_B: ret=get_server_hello(s); if (ret <= 0) goto end; s->init_num=0; if (!s->hit) /* new session */ { s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A; BREAK; } else { s->state=SSL2_ST_CLIENT_START_ENCRYPTION; break; } case SSL2_ST_SEND_CLIENT_MASTER_KEY_A: case SSL2_ST_SEND_CLIENT_MASTER_KEY_B: ret=client_master_key(s); if (ret <= 0) goto end; s->init_num=0; s->state=SSL2_ST_CLIENT_START_ENCRYPTION; break; case SSL2_ST_CLIENT_START_ENCRYPTION: /* Ok, we now have all the stuff needed to * start encrypting, so lets fire it up :-) */ if (!ssl2_enc_init(s,1)) { ret= -1; goto end; } s->s2->clear_text=0; s->state=SSL2_ST_SEND_CLIENT_FINISHED_A; break; case SSL2_ST_SEND_CLIENT_FINISHED_A: case SSL2_ST_SEND_CLIENT_FINISHED_B: ret=client_finished(s); if (ret <= 0) goto end; s->init_num=0; s->state=SSL2_ST_GET_SERVER_VERIFY_A; break; case SSL2_ST_GET_SERVER_VERIFY_A: case SSL2_ST_GET_SERVER_VERIFY_B: ret=get_server_verify(s); if (ret <= 0) goto end; s->init_num=0; s->state=SSL2_ST_GET_SERVER_FINISHED_A; break; case SSL2_ST_GET_SERVER_FINISHED_A: case SSL2_ST_GET_SERVER_FINISHED_B: ret=get_server_finished(s); if (ret <= 0) goto end; break; case SSL2_ST_SEND_CLIENT_CERTIFICATE_A: case SSL2_ST_SEND_CLIENT_CERTIFICATE_B: case SSL2_ST_SEND_CLIENT_CERTIFICATE_C: case SSL2_ST_SEND_CLIENT_CERTIFICATE_D: case SSL2_ST_X509_GET_CLIENT_CERTIFICATE: ret=client_certificate(s); if (ret <= 0) goto end; s->init_num=0; s->state=SSL2_ST_GET_SERVER_FINISHED_A; break; case SSL_ST_OK: if (s->init_buf != NULL) { BUF_MEM_free(s->init_buf); s->init_buf=NULL; } s->init_num=0; /* ERR_clear_error();*/ /* If we want to cache session-ids in the client * and we successfully add the session-id to the * cache, and there is a callback, then pass it out. * 26/11/96 - eay - only add if not a re-used session. */ ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); if (s->hit) s->ctx->stats.sess_hit++; ret=1; /* s->server=0; */ s->ctx->stats.sess_connect_good++; if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); goto end; /* break; */ default: SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE); return(-1); /* break; */ } if ((cb != NULL) && (s->state != state)) { new_state=s->state; s->state=state; cb(s,SSL_CB_CONNECT_LOOP,1); s->state=new_state; } } end: s->in_handshake--; if (cb != NULL) cb(s,SSL_CB_CONNECT_EXIT,ret); return(ret); } static int get_server_hello(SSL *s) { unsigned char *buf; unsigned char *p; int i,j; unsigned long len; STACK_OF(SSL_CIPHER) *sk=NULL,*cl; buf=(unsigned char *)s->init_buf->data; p=buf; if (s->state == SSL2_ST_GET_SERVER_HELLO_A) { i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num); if (i < (11-s->init_num)) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); s->init_num = 11; if (*(p++) != SSL2_MT_SERVER_HELLO) { if (p[-1] != SSL2_MT_ERROR) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_READ_WRONG_PACKET_TYPE); } else SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_PEER_ERROR); return(-1); } #ifdef __APPLE_CC__ /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug * workaround. */ s->hit=(i=*(p++))?1:0; #else s->hit=(*(p++))?1:0; #endif s->s2->tmp.cert_type= *(p++); n2s(p,i); if (i < s->version) s->version=i; n2s(p,i); s->s2->tmp.cert_length=i; n2s(p,i); s->s2->tmp.csl=i; n2s(p,i); s->s2->tmp.conn_id_length=i; s->state=SSL2_ST_GET_SERVER_HELLO_B; } /* SSL2_ST_GET_SERVER_HELLO_B */ len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length; if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG); return -1; } j = (int)len - s->init_num; i = ssl2_read(s,(char *)&(buf[s->init_num]),j); if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); /* things are looking good */ p = buf + 11; if (s->hit) { if (s->s2->tmp.cert_length != 0) { SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO); return(-1); } if (s->s2->tmp.cert_type != 0) { if (!(s->options & SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) { SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO); return(-1); } } if (s->s2->tmp.csl != 0) { SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO); return(-1); } } else { #ifdef undef /* very bad */ memset(s->session->session_id,0, SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES); s->session->session_id_length=0; */ #endif /* we need to do this in case we were trying to reuse a * client session but others are already reusing it. * If this was a new 'blank' session ID, the session-id * length will still be 0 */ if (s->session->session_id_length > 0) { if (!ssl_get_new_session(s,0)) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); return(-1); } } if (ssl2_set_certificate(s,s->s2->tmp.cert_type, s->s2->tmp.cert_length,p) <= 0) { ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); return(-1); } p+=s->s2->tmp.cert_length; if (s->s2->tmp.csl == 0) { ssl2_return_error(s,SSL2_PE_NO_CIPHER); SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST); return(-1); } /* We have just received a list of ciphers back from the * server. We need to get the ones that match, then select * the one we want the most :-). */ /* load the ciphers */ sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl, &s->session->ciphers); p+=s->s2->tmp.csl; if (sk == NULL) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); return(-1); } sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp); /* get the array of ciphers we will accept */ cl=ssl_get_ciphers_by_id(s); /* In theory we could have ciphers sent back that we * don't want to use but that does not matter since we * will check against the list we originally sent and * for performance reasons we should not bother to match * the two lists up just to check. */ for (i=0; i= 0) break; } if (i >= sk_SSL_CIPHER_num(cl)) { ssl2_return_error(s,SSL2_PE_NO_CIPHER); SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH); return(-1); } s->session->cipher=sk_SSL_CIPHER_value(cl,i); if (s->session->peer != NULL) /* can't happen*/ { ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_INTERNAL_ERROR); return(-1); } s->session->peer = s->session->sess_cert->peer_key->x509; /* peer_key->x509 has been set by ssl2_set_certificate. */ CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); } if (s->session->peer != s->session->sess_cert->peer_key->x509) /* can't happen */ { ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_INTERNAL_ERROR); return(-1); } s->s2->conn_id_length=s->s2->tmp.conn_id_length; if (s->s2->conn_id_length > sizeof s->s2->conn_id) { ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG); return -1; } memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length); return(1); } static int client_hello(SSL *s) { unsigned char *buf; unsigned char *p,*d; /* CIPHER **cipher;*/ int i,n,j; buf=(unsigned char *)s->init_buf->data; if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) { if ((s->session == NULL) || (s->session->ssl_version != s->version)) { if (!ssl_get_new_session(s,0)) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); return(-1); } } /* else use the pre-loaded session */ p=buf; /* header */ d=p+9; /* data section */ *(p++)=SSL2_MT_CLIENT_HELLO; /* type */ s2n(SSL2_VERSION,p); /* version */ n=j=0; n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d); d+=n; if (n == 0) { SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); return(-1); } s2n(n,p); /* cipher spec num bytes */ if ((s->session->session_id_length > 0) && (s->session->session_id_length <= SSL2_MAX_SSL_SESSION_ID_LENGTH)) { i=s->session->session_id_length; s2n(i,p); /* session id length */ memcpy(d,s->session->session_id,(unsigned int)i); d+=i; } else { s2n(0,p); } s->s2->challenge_length=SSL2_CHALLENGE_LENGTH; s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */ /*challenge id data*/ RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH); memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH); d+=SSL2_CHALLENGE_LENGTH; s->state=SSL2_ST_SEND_CLIENT_HELLO_B; s->init_num=d-buf; s->init_off=0; } /* SSL2_ST_SEND_CLIENT_HELLO_B */ return(ssl2_do_write(s)); } static int client_master_key(SSL *s) { unsigned char *buf; unsigned char *p,*d; int clear,enc,karg,i; SSL_SESSION *sess; const EVP_CIPHER *c; const EVP_MD *md; buf=(unsigned char *)s->init_buf->data; if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) { if (!ssl_cipher_get_evp(s->session,&c,&md,NULL)) { ssl2_return_error(s,SSL2_PE_NO_CIPHER); SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); return(-1); } sess=s->session; p=buf; d=p+10; *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */ i=ssl_put_cipher_by_char(s,sess->cipher,p); p+=i; /* make key_arg data */ i=EVP_CIPHER_iv_length(c); sess->key_arg_length=i; if (i > SSL_MAX_KEY_ARG_LENGTH) { ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_INTERNAL_ERROR); return -1; } if (i > 0) RAND_pseudo_bytes(sess->key_arg,i); /* make a master key */ i=EVP_CIPHER_key_length(c); sess->master_key_length=i; if (i > 0) { if (i > sizeof sess->master_key) { ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_INTERNAL_ERROR); return -1; } if (RAND_bytes(sess->master_key,i) <= 0) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); return(-1); } } if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) enc=8; else if (SSL_C_IS_EXPORT(sess->cipher)) enc=5; else enc=i; if (i < enc) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR); return(-1); } clear=i-enc; s2n(clear,p); memcpy(d,sess->master_key,(unsigned int)clear); d+=clear; enc=ssl_rsa_public_encrypt(sess->sess_cert,enc, &(sess->master_key[clear]),d, (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); if (enc <= 0) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR); return(-1); } #ifdef PKCS1_CHECK if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++; if (s->options & SSL_OP_PKCS1_CHECK_2) sess->master_key[clear]++; #endif s2n(enc,p); d+=enc; karg=sess->key_arg_length; s2n(karg,p); /* key arg size */ if (karg > sizeof sess->key_arg) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_INTERNAL_ERROR); return -1; } memcpy(d,sess->key_arg,(unsigned int)karg); d+=karg; s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B; s->init_num=d-buf; s->init_off=0; } /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */ return(ssl2_do_write(s)); } static int client_finished(SSL *s) { unsigned char *p; if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) { p=(unsigned char *)s->init_buf->data; *(p++)=SSL2_MT_CLIENT_FINISHED; if (s->s2->conn_id_length > sizeof s->s2->conn_id) { SSLerr(SSL_F_CLIENT_FINISHED, SSL_R_INTERNAL_ERROR); return -1; } memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length); s->state=SSL2_ST_SEND_CLIENT_FINISHED_B; s->init_num=s->s2->conn_id_length+1; s->init_off=0; } return(ssl2_do_write(s)); } /* read the data and then respond */ static int client_certificate(SSL *s) { unsigned char *buf; unsigned char *p,*d; int i; unsigned int n; int cert_ch_len; unsigned char *cert_ch; buf=(unsigned char *)s->init_buf->data; /* We have a cert associated with the SSL, so attach it to * the session if it does not have one */ if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) { i=ssl2_read(s,(char *)&(buf[s->init_num]), SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num); if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num)) return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i)); s->init_num += i; /* type=buf[0]; */ /* type eq x509 */ if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) { ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE); return(-1); } if ((s->cert == NULL) || (s->cert->key->x509 == NULL) || (s->cert->key->privatekey == NULL)) { s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE; } else s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; } cert_ch = buf + 2; cert_ch_len = s->init_num - 2; if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) { X509 *x509=NULL; EVP_PKEY *pkey=NULL; /* If we get an error we need to * ssl->rwstate=SSL_X509_LOOKUP; * return(error); * We should then be retried when things are ok and we * can get a cert or not */ i=0; if (s->ctx->client_cert_cb != NULL) { i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); } if (i < 0) { s->rwstate=SSL_X509_LOOKUP; return(-1); } s->rwstate=SSL_NOTHING; if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; if ( !SSL_use_certificate(s,x509) || !SSL_use_PrivateKey(s,pkey)) { i=0; } X509_free(x509); EVP_PKEY_free(pkey); } else if (i == 1) { if (x509 != NULL) X509_free(x509); if (pkey != NULL) EVP_PKEY_free(pkey); SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); i=0; } if (i == 0) { /* We have no client certificate to respond with * so send the correct error message back */ s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B; p=buf; *(p++)=SSL2_MT_ERROR; s2n(SSL2_PE_NO_CERTIFICATE,p); s->init_off=0; s->init_num=3; /* Write is done at the end */ } } if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) { return(ssl2_do_write(s)); } if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) { EVP_MD_CTX ctx; /* ok, now we calculate the checksum * do it first so we can reuse buf :-) */ p=buf; EVP_SignInit(&ctx,s->ctx->rsa_md5); EVP_SignUpdate(&ctx,s->s2->key_material, (unsigned int)s->s2->key_material_length); EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len); n=i2d_X509(s->session->sess_cert->peer_key->x509,&p); EVP_SignUpdate(&ctx,buf,(unsigned int)n); p=buf; d=p+6; *(p++)=SSL2_MT_CLIENT_CERTIFICATE; *(p++)=SSL2_CT_X509_CERTIFICATE; n=i2d_X509(s->cert->key->x509,&d); s2n(n,p); if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey)) { /* this is not good. If things have failed it * means there so something wrong with the key. * We will continue with a 0 length signature */ } memset(&ctx,0,sizeof(ctx)); s2n(n,p); d+=n; s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D; s->init_num=d-buf; s->init_off=0; } /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */ return(ssl2_do_write(s)); } static int get_server_verify(SSL *s) { unsigned char *p; int i, n, len; p=(unsigned char *)s->init_buf->data; if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) { i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); if (i < (1-s->init_num)) return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); s->init_num += i; s->state= SSL2_ST_GET_SERVER_VERIFY_B; if (*p != SSL2_MT_SERVER_VERIFY) { if (p[0] != SSL2_MT_ERROR) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_READ_WRONG_PACKET_TYPE); } else SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_PEER_ERROR); return(-1); } } p=(unsigned char *)s->init_buf->data; len = 1 + s->s2->challenge_length; n = len - s->init_num; i = ssl2_read(s,(char *)&(p[s->init_num]),n); if (i < n) return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); p += 1; if (memcmp(p,s->s2->challenge,(unsigned int)s->s2->challenge_length) != 0) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT); return(-1); } return(1); } static int get_server_finished(SSL *s) { unsigned char *buf; unsigned char *p; int i, n, len; buf=(unsigned char *)s->init_buf->data; p=buf; if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) { i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num); if (i < (1-s->init_num)) return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); s->init_num += i; if (*p == SSL2_MT_REQUEST_CERTIFICATE) { s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A; return(1); } else if (*p != SSL2_MT_SERVER_FINISHED) { if (p[0] != SSL2_MT_ERROR) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); } else SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR); return(-1); } s->state=SSL2_ST_GET_SERVER_FINISHED_B; } len = 1 + SSL2_SSL_SESSION_ID_LENGTH; n = len - s->init_num; i = ssl2_read(s,(char *)&(buf[s->init_num]), n); if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */ return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); s->init_num += i; if (!s->hit) /* new session */ { /* new session-id */ /* Make sure we were not trying to re-use an old SSL_SESSION * or bad things can happen */ /* ZZZZZZZZZZZZZ */ s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; memcpy(s->session->session_id,p,SSL2_SSL_SESSION_ID_LENGTH); } else { if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) { if ((s->session->session_id_length > sizeof s->session->session_id) || (0 != memcmp(buf, s->session->session_id, (unsigned int)s->session->session_id_length))) { ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT); return(-1); } } } s->state = SSL_ST_OK; return(1); } /* loads in the certificate from the server */ int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data) { STACK_OF(X509) *sk=NULL; EVP_PKEY *pkey=NULL; SESS_CERT *sc=NULL; int i; X509 *x509=NULL; int ret=0; x509=d2i_X509(NULL,&data,(long)len); if (x509 == NULL) { SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB); goto err; } if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509)) { SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE); goto err; } i=ssl_verify_cert_chain(s,sk); if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)) { SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); goto err; } ERR_clear_error(); /* but we keep s->verify_result */ s->session->verify_result = s->verify_result; /* server's cert for this session */ sc=ssl_sess_cert_new(); if (sc == NULL) { ret= -1; goto err; } if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); s->session->sess_cert=sc; sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509; sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]); pkey=X509_get_pubkey(x509); x509=NULL; if (pkey == NULL) { SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY); goto err; } if (pkey->type != EVP_PKEY_RSA) { SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA); goto err; } if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE)) goto err; ret=1; err: sk_X509_free(sk); X509_free(x509); EVP_PKEY_free(pkey); return(ret); } static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, unsigned char *to, int padding) { EVP_PKEY *pkey=NULL; int i= -1; if ((sc == NULL) || (sc->peer_key->x509 == NULL) || ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL)) { SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY); return(-1); } if (pkey->type != EVP_PKEY_RSA) { SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); goto end; } /* we have the public key */ i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding); if (i < 0) SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB); end: EVP_PKEY_free(pkey); return(i); } #else /* !NO_SSL2 */ # if PEDANTIC static void *dummy=&dummy; # endif #endif