[gssapi-openssh.git] / openssh / cipher.h

/*
 * 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.
 */

/* RCSID("$OpenBSD: cipher.h,v 1.29 2001/08/23 11:31:59 markus Exp $"); */

#ifndef CIPHER_H
#define CIPHER_H

#include <openssl/des.h>
#include <openssl/blowfish.h>
#include <openssl/rc4.h>
#include <openssl/cast.h>
#include "rijndael.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

typedef struct Cipher Cipher;
typedef struct CipherContext CipherContext;

struct CipherContext {
	union {
		struct {
			des_key_schedule key;
			des_cblock iv;
		}	des;
		struct {
			des_key_schedule key1;
			des_key_schedule key2;
			des_key_schedule key3;
			des_cblock iv1;
			des_cblock iv2;
			des_cblock iv3;
		}       des3;
		struct {
			struct bf_key_st key;
			u_char iv[8];
		}       bf;
		struct {
			CAST_KEY key;
			u_char iv[8];
		} cast;
		struct {
			u_char iv[16];
			rijndael_ctx enc;
			rijndael_ctx dec;
		} rijndael;
		RC4_KEY rc4;
	}       u;
	Cipher *cipher;
};
struct Cipher {
	char	*name;
	int	number;		/* for ssh1 only */
	u_int	block_size;
	u_int	key_len;
	void	(*setkey)(CipherContext *, const u_char *, u_int);
	void	(*setiv)(CipherContext *, const u_char *, u_int);
	void	(*encrypt)(CipherContext *, u_char *, const u_char *, u_int);
	void	(*decrypt)(CipherContext *, u_char *, const u_char *, u_int);
};

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);
void	 cipher_encrypt(CipherContext *, u_char *, const u_char *, u_int);
void	 cipher_decrypt(CipherContext *, u_char *, const u_char *, u_int);
void	 cipher_set_key_string(CipherContext *, Cipher *, const char *);

#endif				/* CIPHER_H */
Commit	Line	Data
3c0ef626	1	/*
	2	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	3	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	4	* All rights reserved
	5	*
	6	* As far as I am concerned, the code I have written for this software
	7	* can be used freely for any purpose. Any derived versions of this
	8	* software must be clearly marked as such, and if the derived work is
	9	* incompatible with the protocol description in the RFC file, it must be
	10	* called by a name other than "ssh" or "Secure Shell".
	11	*
	12	* Copyright (c) 2000 Markus Friedl. All rights reserved.
	13	*
	14	* Redistribution and use in source and binary forms, with or without
	15	* modification, are permitted provided that the following conditions
	16	* are met:
	17	* 1. Redistributions of source code must retain the above copyright
	18	* notice, this list of conditions and the following disclaimer.
	19	* 2. Redistributions in binary form must reproduce the above copyright
	20	* notice, this list of conditions and the following disclaimer in the
	21	* documentation and/or other materials provided with the distribution.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	24	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	25	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	26	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	27	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	28	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	29	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	30	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	31	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	32	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	33	*/
	34
	35	/* RCSID("$OpenBSD: cipher.h,v 1.29 2001/08/23 11:31:59 markus Exp $"); */
	36
	37	#ifndef CIPHER_H
	38	#define CIPHER_H
	39
	40	#include <openssl/des.h>
	41	#include <openssl/blowfish.h>
	42	#include <openssl/rc4.h>
	43	#include <openssl/cast.h>
	44	#include "rijndael.h"
	45	/*
	46	* Cipher types for SSH-1. New types can be added, but old types should not
	47	* be removed for compatibility. The maximum allowed value is 31.
	48	*/
	49	#define SSH_CIPHER_SSH2 -3
	50	#define SSH_CIPHER_ILLEGAL -2 /* No valid cipher selected. */
	51	#define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
	52	#define SSH_CIPHER_NONE 0 /* no encryption */
	53	#define SSH_CIPHER_IDEA 1 /* IDEA CFB */
	54	#define SSH_CIPHER_DES 2 /* DES CBC */
	55	#define SSH_CIPHER_3DES 3 /* 3DES CBC */
	56	#define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
	57	#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
	58	#define SSH_CIPHER_BLOWFISH 6
	59	#define SSH_CIPHER_RESERVED 7
	60	#define SSH_CIPHER_MAX 31
	61
	62	typedef struct Cipher Cipher;
	63	typedef struct CipherContext CipherContext;
	64
65	struct CipherContext {
66	union {
67	struct {
68	des_key_schedule key;
69	des_cblock iv;
70	} des;
71	struct {
72	des_key_schedule key1;
73	des_key_schedule key2;
74	des_key_schedule key3;
75	des_cblock iv1;
76	des_cblock iv2;
77	des_cblock iv3;
78	} des3;
79	struct {
80	struct bf_key_st key;
81	u_char iv[8];
82	} bf;
83	struct {
84	CAST_KEY key;
85	u_char iv[8];
86	} cast;
87	struct {
88	u_char iv[16];
89	rijndael_ctx enc;
90	rijndael_ctx dec;
91	} rijndael;
92	RC4_KEY rc4;
93	} u;
94	Cipher *cipher;
95	};
96	struct Cipher {
97	char *name;
98	int number; /* for ssh1 only */
99	u_int block_size;
100	u_int key_len;
101	void (setkey)(CipherContext , const u_char *, u_int);
102	void (setiv)(CipherContext , const u_char *, u_int);
103	void (encrypt)(CipherContext , u_char , const u_char , u_int);
104	void (decrypt)(CipherContext , u_char , const u_char , u_int);
105	};
106
107	u_int cipher_mask_ssh1(int);
108	Cipher cipher_by_name(const char );
109	Cipher *cipher_by_number(int);
110	int cipher_number(const char *);
111	char *cipher_name(int);
112	int ciphers_valid(const char *);
113	void cipher_init(CipherContext , Cipher , const u_char *, u_int,
114	const u_char *, u_int);
115	void cipher_encrypt(CipherContext , u_char , const u_char *, u_int);
116	void cipher_decrypt(CipherContext , u_char , const u_char *, u_int);
117	void cipher_set_key_string(CipherContext , Cipher , const char *);
118
119	#endif /* CIPHER_H */