[openssh.git] / cipher.h

/* $OpenBSD: cipher.h,v 1.37 2009/01/26 09:58:15 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_INVALID	-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		0

typedef 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(const Cipher *);
u_int	 cipher_keylen(const Cipher *);
u_int	 cipher_is_cbc(const Cipher *);

u_int	 cipher_get_number(const Cipher *);
void	 cipher_get_keyiv(CipherContext *, u_char *, u_int);
void	 cipher_set_keyiv(CipherContext *, u_char *);
int	 cipher_get_keyiv_len(const CipherContext *);
int	 cipher_get_keycontext(const CipherContext *, u_char *);
void	 cipher_set_keycontext(CipherContext *, u_char *);
#endif				/* CIPHER_H */
Commit	Line	Data
608bcf58	1	/* $OpenBSD: cipher.h,v 1.37 2009/01/26 09:58:15 markus Exp $ */
93c3b6de	2
8efc0c15	3	/*
5260325f	4	* Author: Tatu Ylonen <ylo@cs.hut.fi>
5260325f	5	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5260325f	6	* All rights reserved
6ae2364d	7	*
bcbf86ec	8	* As far as I am concerned, the code I have written for this software
	9	* can be used freely for any purpose. Any derived versions of this
	10	* software must be clearly marked as such, and if the derived work is
	11	* incompatible with the protocol description in the RFC file, it must be
	12	* called by a name other than "ssh" or "Secure Shell".
94ec8c6b	13	*
	14	* Copyright (c) 2000 Markus Friedl. All rights reserved.
	15	*
	16	* Redistribution and use in source and binary forms, with or without
	17	* modification, are permitted provided that the following conditions
	18	* are met:
	19	* 1. Redistributions of source code must retain the above copyright
	20	* notice, this list of conditions and the following disclaimer.
	21	* 2. Redistributions in binary form must reproduce the above copyright
	22	* notice, this list of conditions and the following disclaimer in the
	23	* documentation and/or other materials provided with the distribution.
	24	*
	25	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	26	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	27	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	28	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	29	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	30	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	31	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	32	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	33	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	34	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
5260325f	35	*/
8efc0c15	36
8efc0c15	37	#ifndef CIPHER_H
	38	#define CIPHER_H
	39
70fc1609	40	#include <openssl/evp.h>
94ec8c6b	41	/*
	42	* Cipher types for SSH-1. New types can be added, but old types should not
	43	* be removed for compatibility. The maximum allowed value is 31.
	44	*/
	45	#define SSH_CIPHER_SSH2 -3
d77347cc	46	#define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */
5260325f	47	#define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
	48	#define SSH_CIPHER_NONE 0 /* no encryption */
	49	#define SSH_CIPHER_IDEA 1 /* IDEA CFB */
	50	#define SSH_CIPHER_DES 2 /* DES CBC */
	51	#define SSH_CIPHER_3DES 3 /* 3DES CBC */
	52	#define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
	53	#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
8efc0c15	54	#define SSH_CIPHER_BLOWFISH 6
7368a6c8	55	#define SSH_CIPHER_RESERVED 7
94ec8c6b	56	#define SSH_CIPHER_MAX 31
7368a6c8	57
3ee832e5	58	#define CIPHER_ENCRYPT 1
	59	#define CIPHER_DECRYPT 0
	60
94ec8c6b	61	typedef struct Cipher Cipher;
94ec8c6b	62	typedef struct CipherContext CipherContext;
8efc0c15	63
3ee832e5	64	struct Cipher;
94ec8c6b	65	struct CipherContext {
3ee832e5	66	int plaintext;
70fc1609	67	EVP_CIPHER_CTX evp;
94ec8c6b	68	Cipher *cipher;
94ec8c6b	69	};
8efc0c15	70
255cabd9	71	u_int cipher_mask_ssh1(int);
	72	Cipher cipher_by_name(const char );
	73	Cipher *cipher_by_number(int);
	74	int cipher_number(const char *);
	75	char *cipher_name(int);
	76	int ciphers_valid(const char *);
	77	void cipher_init(CipherContext , Cipher , const u_char *, u_int,
3ee832e5	78	const u_char *, u_int, int);
	79	void cipher_crypt(CipherContext , u_char , const u_char *, u_int);
	80	void cipher_cleanup(CipherContext *);
	81	void cipher_set_key_string(CipherContext , Cipher , const char *, int);
b6c7b7b7	82	u_int cipher_blocksize(const Cipher *);
b6c7b7b7	83	u_int cipher_keylen(const Cipher *);
608bcf58	84	u_int cipher_is_cbc(const Cipher *);
bf8269a9	85
b6c7b7b7	86	u_int cipher_get_number(const Cipher *);
bf8269a9	87	void cipher_get_keyiv(CipherContext , u_char , u_int);
bf8269a9	88	void cipher_set_keyiv(CipherContext , u_char );
b6c7b7b7	89	int cipher_get_keyiv_len(const CipherContext *);
b6c7b7b7	90	int cipher_get_keycontext(const CipherContext , u_char );
bf8269a9	91	void cipher_set_keycontext(CipherContext , u_char );
5260325f	92	#endif /* CIPHER_H */