diff options
Diffstat (limited to 'openssl/ssl/s2_clnt.c')
| -rw-r--r-- | openssl/ssl/s2_clnt.c | 1123 |
1 files changed, 1123 insertions, 0 deletions
diff --git a/openssl/ssl/s2_clnt.c b/openssl/ssl/s2_clnt.c new file mode 100644 index 000000000..782129cd5 --- /dev/null +++ b/openssl/ssl/s2_clnt.c @@ -0,0 +1,1123 @@ +/* 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 OPENSSL_NO_SSL2 +#include <stdio.h> +#include <openssl/rand.h> +#include <openssl/buffer.h> +#include <openssl/objects.h> +#include <openssl/evp.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); + } + +IMPLEMENT_ssl2_meth_func(SSLv2_client_method, + ssl_undefined_function, + ssl2_connect, + ssl2_get_client_method) + +int ssl2_connect(SSL *s) + { + unsigned long l=(unsigned long)time(NULL); + BUF_MEM *buf=NULL; + int ret= -1; + void (*cb)(const SSL *ssl,int type,int val)=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)) + { + if (buf == s->init_buf) + buf=NULL; + ret= -1; + goto end; + } + s->init_buf=buf; + buf=NULL; + 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 (buf != NULL) + BUF_MEM_free(buf); + 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, *prio, *allow; + + 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. <appro@fy.chalmers.se> */ + 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)); + if (s->msg_callback) + s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */ + + /* 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); + } + + (void)sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp); + + /* get the array of ciphers we will accept */ + cl=SSL_get_ciphers(s); + (void)sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp); + + /* + * If server preference flag set, choose the first + * (highest priority) cipher the server sends, otherwise + * client preference has priority. + */ + if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) + { + prio = sk; + allow = cl; + } + else + { + prio = cl; + allow = sk; + } + /* 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<sk_SSL_CIPHER_num(prio); i++) + { + if (sk_SSL_CIPHER_find(allow, + sk_SSL_CIPHER_value(prio,i)) >= 0) + break; + } + + if (i >= sk_SSL_CIPHER_num(prio)) + { + 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(prio,i); + + + if (s->session->peer != NULL) /* can't happen*/ + { + ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); + SSLerr(SSL_F_GET_SERVER_HELLO, ERR_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->sess_cert == NULL + || 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, ERR_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,0); + 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*/ + if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0) + return -1; + 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, ERR_R_INTERNAL_ERROR); + return -1; + } + if (i > 0) + if (RAND_pseudo_bytes(sess->key_arg,i) <= 0) + return -1; + + /* make a master key */ + i=EVP_CIPHER_key_length(c); + sess->master_key_length=i; + if (i > 0) + { + if (i > (int)sizeof(sess->master_key)) + { + ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); + SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_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 ((int)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 > (int)sizeof(sess->key_arg)) + { + ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); + SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_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, ERR_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; + if (s->msg_callback) + s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */ + + /* 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_MD_CTX_init(&ctx); + EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL); + EVP_SignUpdate(&ctx,s->s2->key_material, + 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 + */ + } + EVP_MD_CTX_cleanup(&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); + /* try to read the error message */ + i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); + return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); + } + 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)); + if (s->msg_callback) + s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */ + p += 1; + + if (memcmp(p,s->s2->challenge,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); + /* try to read the error message */ + i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); + return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); + } + 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->msg_callback) + s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */ + + 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+1,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 + 1, 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, const 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 <= 0)) + { + 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 /* !OPENSSL_NO_SSL2 */ + +# if PEDANTIC +static void *dummy=&dummy; +# endif + +#endif |