Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1 | /* $OpenBSD: cipher.h,v 1.47 2015/01/14 10:24:42 markus Exp $ */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2 | |
| 3 | /* |
| 4 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 5 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 6 | * All rights reserved |
| 7 | * |
| 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". |
| 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. |
| 35 | */ |
| 36 | |
| 37 | #ifndef CIPHER_H |
| 38 | #define CIPHER_H |
| 39 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 40 | #include <sys/types.h> |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 41 | #include <openssl/evp.h> |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 42 | #include "cipher-chachapoly.h" |
| 43 | #include "cipher-aesctr.h" |
| 44 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 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_INVALID -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 | #define CIPHER_ENCRYPT 1 |
| 63 | #define CIPHER_DECRYPT 0 |
| 64 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 65 | struct sshcipher; |
| 66 | struct sshcipher_ctx { |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 67 | int plaintext; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 68 | int encrypt; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 69 | EVP_CIPHER_CTX evp; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 70 | struct chachapoly_ctx cp_ctx; /* XXX union with evp? */ |
| 71 | struct aesctr_ctx ac_ctx; /* XXX union with evp? */ |
| 72 | const struct sshcipher *cipher; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 73 | }; |
| 74 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 75 | typedef struct sshcipher Cipher; |
| 76 | typedef struct sshcipher_ctx CipherContext; |
| 77 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 78 | u_int cipher_mask_ssh1(int); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 79 | const struct sshcipher *cipher_by_name(const char *); |
| 80 | const struct sshcipher *cipher_by_number(int); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 81 | int cipher_number(const char *); |
| 82 | char *cipher_name(int); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 83 | const char *cipher_warning_message(const struct sshcipher_ctx *); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 84 | int ciphers_valid(const char *); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 85 | char *cipher_alg_list(char, int); |
| 86 | int cipher_init(struct sshcipher_ctx *, const struct sshcipher *, |
| 87 | const u_char *, u_int, const u_char *, u_int, int); |
| 88 | int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *, |
| 89 | u_int, u_int, u_int); |
| 90 | int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int, |
| 91 | const u_char *, u_int); |
| 92 | int cipher_cleanup(struct sshcipher_ctx *); |
| 93 | int cipher_set_key_string(struct sshcipher_ctx *, const struct sshcipher *, |
| 94 | const char *, int); |
| 95 | u_int cipher_blocksize(const struct sshcipher *); |
| 96 | u_int cipher_keylen(const struct sshcipher *); |
| 97 | u_int cipher_seclen(const struct sshcipher *); |
| 98 | u_int cipher_authlen(const struct sshcipher *); |
| 99 | u_int cipher_ivlen(const struct sshcipher *); |
| 100 | u_int cipher_is_cbc(const struct sshcipher *); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 101 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 102 | u_int cipher_get_number(const struct sshcipher *); |
| 103 | int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int); |
| 104 | int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *); |
| 105 | int cipher_get_keyiv_len(const struct sshcipher_ctx *); |
| 106 | int cipher_get_keycontext(const struct sshcipher_ctx *, u_char *); |
| 107 | void cipher_set_keycontext(struct sshcipher_ctx *, const u_char *); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 108 | #endif /* CIPHER_H */ |