/*	$OpenBSD: cipher.h,v 1.33 2002/03/18 17:13:15 markus Exp $	*//* * Author: Tatu Ylonen <ylo@cs.hut.fi> * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland *                    All rights reserved * * As far as I am concerned, the code I have written for this software * can be used freely for any purpose.  Any derived versions of this * software must be clearly marked as such, and if the derived work is * incompatible with the protocol description in the RFC file, it must be * called by a name other than "ssh" or "Secure Shell". * * Copyright (c) 2000 Markus Friedl.  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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. */#ifndef CIPHER_H#define CIPHER_H#include <openssl/evp.h>/* * Cipher types for SSH-1.  New types can be added, but old types should not * be removed for compatibility.  The maximum allowed value is 31. */#define SSH_CIPHER_SSH2		-3#define SSH_CIPHER_ILLEGAL	-2	/* No valid cipher selected. */#define SSH_CIPHER_NOT_SET	-1	/* None selected (invalid number). */#define SSH_CIPHER_NONE		0	/* no encryption */#define SSH_CIPHER_IDEA		1	/* IDEA CFB */#define SSH_CIPHER_DES		2	/* DES CBC */#define SSH_CIPHER_3DES		3	/* 3DES CBC */#define SSH_CIPHER_BROKEN_TSS	4	/* TRI's Simple Stream encryption CBC */#define SSH_CIPHER_BROKEN_RC4	5	/* Alleged RC4 */#define SSH_CIPHER_BLOWFISH	6#define SSH_CIPHER_RESERVED	7#define SSH_CIPHER_MAX		31#define CIPHER_ENCRYPT		1#define CIPHER_DECRYPT		0typedef struct Cipher Cipher;typedef struct CipherContext CipherContext;struct Cipher;struct CipherContext {	int	plaintext;	EVP_CIPHER_CTX evp;	Cipher *cipher;};u_int	 cipher_mask_ssh1(int);Cipher	*cipher_by_name(const char *);Cipher	*cipher_by_number(int);int	 cipher_number(const char *);char	*cipher_name(int);int	 ciphers_valid(const char *);void	 cipher_init(CipherContext *, Cipher *, const u_char *, u_int,    const u_char *, u_int, int);void	 cipher_crypt(CipherContext *, u_char *, const u_char *, u_int);void	 cipher_cleanup(CipherContext *);void	 cipher_set_key_string(CipherContext *, Cipher *, const char *, int);u_int	 cipher_blocksize(Cipher *);u_int	 cipher_keylen(Cipher *);u_int	 cipher_get_number(Cipher *);void	 cipher_get_keyiv(CipherContext *, u_char *, u_int);void	 cipher_set_keyiv(CipherContext *, u_char *);int	 cipher_get_keyiv_len(CipherContext *);int	 cipher_get_keycontext(CipherContext *, u_char *);void	 cipher_set_keycontext(CipherContext *, u_char *);#endif				/* CIPHER_H */