source-engine/thirdparty/openssl/ssl/s23_lib.c

/* ssl/s23_lib.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.]
 */

#include <stdio.h>
#include <openssl/objects.h>
#include "ssl_locl.h"

long ssl23_default_timeout(void)
{
    return (300);
}

int ssl23_num_ciphers(void)
{
    return (ssl3_num_ciphers()
#ifndef OPENSSL_NO_SSL2
            + ssl2_num_ciphers()
#endif
        );
}

const SSL_CIPHER *ssl23_get_cipher(unsigned int u)
{
    unsigned int uu = ssl3_num_ciphers();

    if (u < uu)
        return (ssl3_get_cipher(u));
    else
#ifndef OPENSSL_NO_SSL2
        return (ssl2_get_cipher(u - uu));
#else
        return (NULL);
#endif
}

/*
 * This function needs to check if the ciphers required are actually
 * available
 */
const SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p)
{
    const SSL_CIPHER *cp;

    cp = ssl3_get_cipher_by_char(p);
#ifndef OPENSSL_NO_SSL2
    if (cp == NULL)
        cp = ssl2_get_cipher_by_char(p);
#endif
    return (cp);
}

int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
{
    long l;

    /* We can write SSLv2 and SSLv3 ciphers */
    /* but no ECC ciphers */
    if (c->algorithm_mkey == SSL_kECDHr ||
        c->algorithm_mkey == SSL_kECDHe ||
        c->algorithm_mkey == SSL_kEECDH ||
        c->algorithm_auth == SSL_aECDH || c->algorithm_auth == SSL_aECDSA)
        return 0;
    if (p != NULL) {
        l = c->id;
        p[0] = ((unsigned char)(l >> 16L)) & 0xFF;
        p[1] = ((unsigned char)(l >> 8L)) & 0xFF;
        p[2] = ((unsigned char)(l)) & 0xFF;
    }
    return (3);
}

int ssl23_read(SSL *s, void *buf, int len)
{
    int n;

    clear_sys_error();
    if (SSL_in_init(s) && (!s->in_handshake)) {
        n = s->handshake_func(s);
        if (n < 0)
            return (n);
        if (n == 0) {
            SSLerr(SSL_F_SSL23_READ, SSL_R_SSL_HANDSHAKE_FAILURE);
            return (-1);
        }
        return (SSL_read(s, buf, len));
    } else {
        ssl_undefined_function(s);
        return (-1);
    }
}

int ssl23_peek(SSL *s, void *buf, int len)
{
    int n;

    clear_sys_error();
    if (SSL_in_init(s) && (!s->in_handshake)) {
        n = s->handshake_func(s);
        if (n < 0)
            return (n);
        if (n == 0) {
            SSLerr(SSL_F_SSL23_PEEK, SSL_R_SSL_HANDSHAKE_FAILURE);
            return (-1);
        }
        return (SSL_peek(s, buf, len));
    } else {
        ssl_undefined_function(s);
        return (-1);
    }
}

int ssl23_write(SSL *s, const void *buf, int len)
{
    int n;

    clear_sys_error();
    if (SSL_in_init(s) && (!s->in_handshake)) {
        n = s->handshake_func(s);
        if (n < 0)
            return (n);
        if (n == 0) {
            SSLerr(SSL_F_SSL23_WRITE, SSL_R_SSL_HANDSHAKE_FAILURE);
            return (-1);
        }
        return (SSL_write(s, buf, len));
    } else {
        ssl_undefined_function(s);
        return (-1);
    }
}