Annotation of src/usr.bin/ssh/cipher.h, Revision 1.47
1.47 ! markus 1: /* $OpenBSD: cipher.h,v 1.46 2014/06/24 01:13:21 djm Exp $ */
1.32 stevesk 2:
1.1 deraadt 3: /*
1.9 deraadt 4: * Author: Tatu Ylonen <ylo@cs.hut.fi>
5: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6: * All rights reserved
1.16 markus 7: *
1.19 deraadt 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".
1.20 markus 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.
1.9 deraadt 35: */
1.1 deraadt 36:
37: #ifndef CIPHER_H
38: #define CIPHER_H
39:
1.46 djm 40: #include <sys/types.h>
1.31 markus 41: #include <openssl/evp.h>
1.42 djm 42: #include "cipher-chachapoly.h"
1.45 markus 43: #include "cipher-aesctr.h"
1.42 djm 44:
1.20 markus 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
1.35 markus 50: #define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */
1.9 deraadt 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 */
1.1 deraadt 58: #define SSH_CIPHER_BLOWFISH 6
1.12 markus 59: #define SSH_CIPHER_RESERVED 7
1.20 markus 60: #define SSH_CIPHER_MAX 31
1.12 markus 61:
1.30 markus 62: #define CIPHER_ENCRYPT 1
63: #define CIPHER_DECRYPT 0
64:
1.46 djm 65: struct sshcipher;
66: struct sshcipher_ctx {
1.30 markus 67: int plaintext;
1.39 markus 68: int encrypt;
1.31 markus 69: EVP_CIPHER_CTX evp;
1.42 djm 70: struct chachapoly_ctx cp_ctx; /* XXX union with evp? */
1.45 markus 71: struct aesctr_ctx ac_ctx; /* XXX union with evp? */
1.46 djm 72: const struct sshcipher *cipher;
1.20 markus 73: };
74:
1.47 ! markus 75: typedef struct sshcipher Cipher;
! 76: typedef struct sshcipher_ctx CipherContext;
1.46 djm 77:
1.28 markus 78: u_int cipher_mask_ssh1(int);
1.46 djm 79: const struct sshcipher *cipher_by_name(const char *);
80: const struct sshcipher *cipher_by_number(int);
1.28 markus 81: int cipher_number(const char *);
82: char *cipher_name(int);
1.47 ! markus 83: const char *cipher_warning_message(const struct sshcipher_ctx *);
1.28 markus 84: int ciphers_valid(const char *);
1.42 djm 85: char *cipher_alg_list(char, int);
1.46 djm 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 *,
1.39 markus 89: u_int, u_int, u_int);
1.46 djm 90: int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
1.42 djm 91: const u_char *, u_int);
1.46 djm 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 *);
101:
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 *);
1.9 deraadt 108: #endif /* CIPHER_H */
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