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Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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source-engine/thirdparty/openssl/ssl/s2_clnt.c

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/* 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 const 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 const 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);
}
# if 0
s->hit = (*(p++)) ? 1 : 0;
/*
* Some [PPC?] compilers fail to increment p in above statement, e.g.
* one provided with Rhapsody 5.5, but most recent example XL C 11.1
* for AIX, even without optimization flag...
*/
# else
s->hit = (*p) ? 1 : 0;
p++;
# 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) {
/* SERVER-HELLO */
s->msg_callback(0, s->version, 0, buf, (size_t)len, s,
s->msg_callback_arg);
}
/* 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_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, NULL, 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_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) {
/* REQUEST-CERTIFICATE */
s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s,
s->msg_callback_arg);
}
/* 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);
i = i2d_X509(s->session->sess_cert->peer_key->x509, &p);
/*
* Don't update the signature if it fails - FIXME: probably should
* handle this better
*/
if (i > 0)
EVP_SignUpdate(&ctx, buf, (unsigned int)i);
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) {
/* SERVER-VERIFY */
s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg);
}
p += 1;
if (CRYPTO_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) {
/* SERVER-FINISHED */
s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s,
s->msg_callback_arg);
}
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