213 lines
6.1 KiB
C
213 lines
6.1 KiB
C
/* ssl/s23_lib.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <openssl/objects.h>
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#include "ssl_locl.h"
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static int ssl23_num_ciphers(void );
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static SSL_CIPHER *ssl23_get_cipher(unsigned int u);
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static int ssl23_read(SSL *s, void *buf, int len);
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static int ssl23_write(SSL *s, const void *buf, int len);
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static long ssl23_default_timeout(void );
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static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
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static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p);
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char *SSL23_version_str="SSLv2/3 compatibility" OPENSSL_VERSION_PTEXT;
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static SSL_METHOD SSLv23_data= {
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TLS1_VERSION,
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tls1_new,
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tls1_clear,
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tls1_free,
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ssl_undefined_function,
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ssl_undefined_function,
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ssl23_read,
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(int (*)(struct ssl_st *, char *, int))ssl_undefined_function,
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ssl23_write,
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ssl_undefined_function,
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ssl_undefined_function,
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ssl_ok,
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ssl3_ctrl,
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ssl3_ctx_ctrl,
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ssl23_get_cipher_by_char,
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ssl23_put_cipher_by_char,
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ssl_undefined_function,
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ssl23_num_ciphers,
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ssl23_get_cipher,
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ssl_bad_method,
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ssl23_default_timeout,
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&ssl3_undef_enc_method,
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};
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static long ssl23_default_timeout(void)
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{
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return(300);
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}
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SSL_METHOD *sslv23_base_method(void)
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{
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return(&SSLv23_data);
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}
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static int ssl23_num_ciphers(void)
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{
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return(ssl3_num_ciphers()+ssl2_num_ciphers());
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}
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static SSL_CIPHER *ssl23_get_cipher(unsigned int u)
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{
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unsigned int uu=ssl3_num_ciphers();
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if (u < uu)
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return(ssl3_get_cipher(u));
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else
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return(ssl2_get_cipher(u-uu));
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}
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/* This function needs to check if the ciphers required are actually
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* available */
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static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p)
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{
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SSL_CIPHER c,*cp;
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unsigned long id;
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int n;
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n=ssl3_num_ciphers();
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id=0x03000000|((unsigned long)p[0]<<16L)|
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((unsigned long)p[1]<<8L)|(unsigned long)p[2];
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c.id=id;
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cp=ssl3_get_cipher_by_char(p);
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if (cp == NULL)
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cp=ssl2_get_cipher_by_char(p);
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return(cp);
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}
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static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
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{
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long l;
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/* We can write SSLv2 and SSLv3 ciphers */
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if (p != NULL)
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{
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l=c->id;
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p[0]=((unsigned char)(l>>16L))&0xFF;
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p[1]=((unsigned char)(l>> 8L))&0xFF;
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p[2]=((unsigned char)(l ))&0xFF;
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}
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return(3);
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}
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static int ssl23_read(SSL *s, void *buf, int len)
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{
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int n;
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#if 0
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if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
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{
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s->rwstate=SSL_NOTHING;
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return(0);
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}
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#endif
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clear_sys_error();
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if (SSL_in_init(s) && (!s->in_handshake))
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{
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n=s->handshake_func(s);
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if (n < 0) return(n);
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if (n == 0)
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{
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SSLerr(SSL_F_SSL23_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
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return(-1);
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}
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return(SSL_read(s,buf,len));
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}
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else
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{
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ssl_undefined_function(s);
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return(-1);
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}
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}
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static int ssl23_write(SSL *s, const void *buf, int len)
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{
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int n;
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#if 0
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if (s->shutdown & SSL_SENT_SHUTDOWN)
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{
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s->rwstate=SSL_NOTHING;
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return(0);
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}
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#endif
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clear_sys_error();
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if (SSL_in_init(s) && (!s->in_handshake))
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{
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n=s->handshake_func(s);
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if (n < 0) return(n);
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if (n == 0)
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{
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SSLerr(SSL_F_SSL23_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
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return(-1);
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}
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return(SSL_write(s,buf,len));
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}
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else
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{
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ssl_undefined_function(s);
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return(-1);
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}
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}
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