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/*
* This file is part of the SSH Library
*
* Copyright (c) 2003,2009 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The SSH Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SSH Library; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
/*
* crypto.h is an include file for internal cryptographic structures of libssh
*/
#ifndef _CRYPTO_H_
#define _CRYPTO_H_
#include "config.h"
#ifdef HAVE_LIBGCRYPT
#include <gcrypt.h>
#endif
#include "libssh/wrapper.h"
#ifdef cbc_encrypt
#undef cbc_encrypt
#endif
#ifdef cbc_decrypt
#undef cbc_decrypt
#endif
struct ssh_crypto_struct {
bignum e,f,x,k,y;
unsigned char session_id[SHA_DIGEST_LEN];
unsigned char encryptIV[SHA_DIGEST_LEN*2];
unsigned char decryptIV[SHA_DIGEST_LEN*2];
unsigned char decryptkey[SHA_DIGEST_LEN*2];
unsigned char encryptkey[SHA_DIGEST_LEN*2];
unsigned char encryptMAC[SHA_DIGEST_LEN];
unsigned char decryptMAC[SHA_DIGEST_LEN];
unsigned char hmacbuf[EVP_MAX_MD_SIZE];
struct crypto_struct *in_cipher, *out_cipher; /* the cipher structures/objects */
ssh_string server_pubkey;
const char *server_pubkey_type;
int do_compress_out; /* idem */
int do_compress_in; /* don't set them, set the option instead */
int delayed_compress_in; /* Use of zlib@openssh.org */
int delayed_compress_out;
void *compress_out_ctx; /* don't touch it */
void *compress_in_ctx; /* really, don't */
};
struct crypto_struct {
const char *name; /* ssh name of the algorithm */
unsigned int blocksize; /* blocksize of the algo */
unsigned int keylen; /* length of the key structure */
#ifdef HAVE_LIBGCRYPT
gcry_cipher_hd_t *key;
#elif defined HAVE_LIBCRYPTO
void *key; /* a key buffer allocated for the algo */
#endif
unsigned int keysize; /* bytes of key used. != keylen */
#ifdef HAVE_LIBGCRYPT
/* sets the new key for immediate use */
int (*set_encrypt_key)(struct crypto_struct *cipher, void *key, void *IV);
int (*set_decrypt_key)(struct crypto_struct *cipher, void *key, void *IV);
void (*cbc_encrypt)(struct crypto_struct *cipher, void *in, void *out,
unsigned long len);
void (*cbc_decrypt)(struct crypto_struct *cipher, void *in, void *out,
unsigned long len);
#elif defined HAVE_LIBCRYPTO
/* sets the new key for immediate use */
int (*set_encrypt_key)(struct crypto_struct *cipher, void *key);
int (*set_decrypt_key)(struct crypto_struct *cipher, void *key);
void (*cbc_encrypt)(struct crypto_struct *cipher, void *in, void *out,
unsigned long len, void *IV);
void (*cbc_decrypt)(struct crypto_struct *cipher, void *in, void *out,
unsigned long len, void *IV);
#endif
};
/* vim: set ts=2 sw=2 et cindent: */
#endif /* _CRYPTO_H_ */
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