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/* $Id: openssl-compat.h,v 1.7 2007/03/05 07:25:20 dtucker Exp $ */
/*
* Copyright (c) 2005 Darren Tucker <dtucker@zip.com.au>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
#include <openssl/evp.h>
#if OPENSSL_VERSION_NUMBER < 0x00906000L
# define SSH_OLD_EVP
# define EVP_CIPHER_CTX_get_app_data(e) ((e)->app_data)
#endif
#if (OPENSSL_VERSION_NUMBER < 0x00907000L) || defined(OPENSSL_LOBOTOMISED_AES)
# define USE_BUILTIN_RIJNDAEL
#endif
#ifdef USE_BUILTIN_RIJNDAEL
# define EVP_aes_128_cbc evp_rijndael
# define EVP_aes_192_cbc evp_rijndael
# define EVP_aes_256_cbc evp_rijndael
extern const EVP_CIPHER *evp_rijndael(void);
extern void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
#endif
#if !defined(EVP_CTRL_SET_ACSS_MODE)
# if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
# define USE_CIPHER_ACSS 1
extern const EVP_CIPHER *evp_acss(void);
# define EVP_acss evp_acss
# else
# define EVP_acss NULL
# endif
#endif
/* OpenSSL 0.9.8e returns cipher key len not context key len */
#if (OPENSSL_VERSION_NUMBER == 0x0090805fL)
# define EVP_CIPHER_CTX_key_length(c) ((c)->key_len)
#endif
/*
* We overload some of the OpenSSL crypto functions with ssh_* equivalents
* which cater for older and/or less featureful OpenSSL version.
*
* In order for the compat library to call the real functions, it must
* define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and
* implement the ssh_* equivalents.
*/
#ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS
# ifdef SSH_OLD_EVP
# ifdef EVP_Cipher
# undef EVP_Cipher
# endif
# define EVP_CipherInit(a,b,c,d,e) ssh_EVP_CipherInit((a),(b),(c),(d),(e))
# define EVP_Cipher(a,b,c,d) ssh_EVP_Cipher((a),(b),(c),(d))
# define EVP_CIPHER_CTX_cleanup(a) ssh_EVP_CIPHER_CTX_cleanup((a))
# endif /* SSH_OLD_EVP */
# ifdef USE_OPENSSL_ENGINE
# ifdef SSLeay_add_all_algorithms
# undef SSLeay_add_all_algorithms
# endif
# define SSLeay_add_all_algorithms() ssh_SSLeay_add_all_algorithms()
#endif
int ssh_EVP_CipherInit(EVP_CIPHER_CTX *, const EVP_CIPHER *, unsigned char *,
unsigned char *, int);
int ssh_EVP_Cipher(EVP_CIPHER_CTX *, char *, char *, int);
int ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *);
void ssh_SSLeay_add_all_algorithms(void);
#endif /* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */
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