1 /* $OpenBSD: cipher.h,v 1.33 2002/03/18 17:13:15 markus Exp $ */ 2 3 #ifndef _CIPHER_H 4 #define _CIPHER_H 5 6 #pragma ident "%Z%%M% %I% %E% SMI" 7 8 #ifdef __cplusplus 9 extern "C" { 10 #endif 11 12 13 /* 14 * Author: Tatu Ylonen <ylo@cs.hut.fi> 15 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 16 * All rights reserved 17 * 18 * As far as I am concerned, the code I have written for this software 19 * can be used freely for any purpose. Any derived versions of this 20 * software must be clearly marked as such, and if the derived work is 21 * incompatible with the protocol description in the RFC file, it must be 22 * called by a name other than "ssh" or "Secure Shell". 23 * 24 * Copyright (c) 2000 Markus Friedl. All rights reserved. 25 * 26 * Redistribution and use in source and binary forms, with or without 27 * modification, are permitted provided that the following conditions 28 * are met: 29 * 1. Redistributions of source code must retain the above copyright 30 * notice, this list of conditions and the following disclaimer. 31 * 2. Redistributions in binary form must reproduce the above copyright 32 * notice, this list of conditions and the following disclaimer in the 33 * documentation and/or other materials provided with the distribution. 34 * 35 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 36 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 38 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 39 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 40 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 44 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45 */ 46 47 #include <openssl/evp.h> 48 /* 49 * Cipher types for SSH-1. New types can be added, but old types should not 50 * be removed for compatibility. The maximum allowed value is 31. 51 */ 52 #define SSH_CIPHER_SSH2 -3 53 #define SSH_CIPHER_ILLEGAL -2 /* No valid cipher selected. */ 54 #define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */ 55 #define SSH_CIPHER_NONE 0 /* no encryption */ 56 #define SSH_CIPHER_IDEA 1 /* IDEA CFB */ 57 #define SSH_CIPHER_DES 2 /* DES CBC */ 58 #define SSH_CIPHER_3DES 3 /* 3DES CBC */ 59 #define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */ 60 #define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */ 61 #define SSH_CIPHER_BLOWFISH 6 62 #define SSH_CIPHER_RESERVED 7 63 #define SSH_CIPHER_MAX 31 64 65 #define CIPHER_ENCRYPT 1 66 #define CIPHER_DECRYPT 0 67 68 typedef struct Cipher Cipher; 69 typedef struct CipherContext CipherContext; 70 71 struct Cipher; 72 struct CipherContext { 73 int plaintext; 74 EVP_CIPHER_CTX evp; 75 Cipher *cipher; 76 }; 77 78 u_int cipher_mask_ssh1(int); 79 Cipher *cipher_by_name(const char *); 80 Cipher *cipher_by_number(int); 81 int cipher_number(const char *); 82 char *cipher_name(int); 83 int ciphers_valid(const char *); 84 void cipher_init(CipherContext *, Cipher *, const u_char *, u_int, 85 const u_char *, u_int, int); 86 void cipher_crypt(CipherContext *, u_char *, const u_char *, u_int); 87 void cipher_cleanup(CipherContext *); 88 void cipher_set_key_string(CipherContext *, Cipher *, const char *, int); 89 u_int cipher_blocksize(Cipher *); 90 u_int cipher_keylen(Cipher *); 91 92 u_int cipher_get_number(Cipher *); 93 void cipher_get_keyiv(CipherContext *, u_char *, u_int); 94 void cipher_set_keyiv(CipherContext *, u_char *); 95 int cipher_get_keyiv_len(CipherContext *); 96 int cipher_get_keycontext(CipherContext *, u_char *); 97 void cipher_set_keycontext(CipherContext *, u_char *); 98 99 #ifdef __cplusplus 100 } 101 #endif 102 103 #endif /* _CIPHER_H */ 104