/* $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 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(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 */