Damien Miller | 690d989 | 2013-11-08 12:16:49 +1100 | [diff] [blame] | 1 | /* $OpenBSD: cipher.h,v 1.41 2013/11/07 11:58:27 dtucker Exp $ */ |
Ben Lindstrom | 05764b9 | 2002-03-05 01:53:02 +0000 | [diff] [blame] | 2 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 3 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 4 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 5 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 6 | * All rights reserved |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 7 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 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". |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 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. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 35 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 36 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 37 | #ifndef CIPHER_H |
| 38 | #define CIPHER_H |
| 39 | |
Damien Miller | 21cf4e0 | 2002-02-19 15:26:42 +1100 | [diff] [blame] | 40 | #include <openssl/evp.h> |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 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 |
Darren Tucker | 5cb30ad | 2004-08-12 22:40:24 +1000 | [diff] [blame] | 46 | #define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 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 */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 54 | #define SSH_CIPHER_BLOWFISH 6 |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 55 | #define SSH_CIPHER_RESERVED 7 |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 56 | #define SSH_CIPHER_MAX 31 |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 57 | |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 58 | #define CIPHER_ENCRYPT 1 |
| 59 | #define CIPHER_DECRYPT 0 |
| 60 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 61 | typedef struct Cipher Cipher; |
| 62 | typedef struct CipherContext CipherContext; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 63 | |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 64 | struct Cipher; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 65 | struct CipherContext { |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 66 | int plaintext; |
Damien Miller | 1d75abf | 2013-01-09 16:12:19 +1100 | [diff] [blame] | 67 | int encrypt; |
Damien Miller | 21cf4e0 | 2002-02-19 15:26:42 +1100 | [diff] [blame] | 68 | EVP_CIPHER_CTX evp; |
Damien Miller | ea11119 | 2013-04-23 19:24:32 +1000 | [diff] [blame] | 69 | const Cipher *cipher; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 70 | }; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 71 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 72 | u_int cipher_mask_ssh1(int); |
Damien Miller | ea11119 | 2013-04-23 19:24:32 +1000 | [diff] [blame] | 73 | const Cipher *cipher_by_name(const char *); |
| 74 | const Cipher *cipher_by_number(int); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 75 | int cipher_number(const char *); |
| 76 | char *cipher_name(int); |
| 77 | int ciphers_valid(const char *); |
Damien Miller | 690d989 | 2013-11-08 12:16:49 +1100 | [diff] [blame] | 78 | char *cipher_alg_list(char); |
Damien Miller | ea11119 | 2013-04-23 19:24:32 +1000 | [diff] [blame] | 79 | void cipher_init(CipherContext *, const Cipher *, const u_char *, u_int, |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 80 | const u_char *, u_int, int); |
Damien Miller | 1d75abf | 2013-01-09 16:12:19 +1100 | [diff] [blame] | 81 | void cipher_crypt(CipherContext *, u_char *, const u_char *, |
| 82 | u_int, u_int, u_int); |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 83 | void cipher_cleanup(CipherContext *); |
Damien Miller | ea11119 | 2013-04-23 19:24:32 +1000 | [diff] [blame] | 84 | void cipher_set_key_string(CipherContext *, const Cipher *, const char *, int); |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 85 | u_int cipher_blocksize(const Cipher *); |
| 86 | u_int cipher_keylen(const Cipher *); |
Damien Miller | 1d75abf | 2013-01-09 16:12:19 +1100 | [diff] [blame] | 87 | u_int cipher_authlen(const Cipher *); |
| 88 | u_int cipher_ivlen(const Cipher *); |
Damien Miller | 13ae44c | 2009-01-28 16:38:41 +1100 | [diff] [blame] | 89 | u_int cipher_is_cbc(const Cipher *); |
Ben Lindstrom | 212faca | 2002-03-22 01:39:44 +0000 | [diff] [blame] | 90 | |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 91 | u_int cipher_get_number(const Cipher *); |
Ben Lindstrom | 212faca | 2002-03-22 01:39:44 +0000 | [diff] [blame] | 92 | void cipher_get_keyiv(CipherContext *, u_char *, u_int); |
| 93 | void cipher_set_keyiv(CipherContext *, u_char *); |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 94 | int cipher_get_keyiv_len(const CipherContext *); |
| 95 | int cipher_get_keycontext(const CipherContext *, u_char *); |
Ben Lindstrom | 212faca | 2002-03-22 01:39:44 +0000 | [diff] [blame] | 96 | void cipher_set_keycontext(CipherContext *, u_char *); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 97 | #endif /* CIPHER_H */ |