Annotation of src/usr.bin/ssh/cipher.h, Revision 1.21
1.1 deraadt 1: /*
1.9 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.16 markus 5: *
1.19 deraadt 6: * As far as I am concerned, the code I have written for this software
7: * can be used freely for any purpose. Any derived versions of this
8: * software must be clearly marked as such, and if the derived work is
9: * incompatible with the protocol description in the RFC file, it must be
10: * called by a name other than "ssh" or "Secure Shell".
1.20 markus 11: *
12: * Copyright (c) 2000 Markus Friedl. All rights reserved.
13: *
14: * Redistribution and use in source and binary forms, with or without
15: * modification, are permitted provided that the following conditions
16: * are met:
17: * 1. Redistributions of source code must retain the above copyright
18: * notice, this list of conditions and the following disclaimer.
19: * 2. Redistributions in binary form must reproduce the above copyright
20: * notice, this list of conditions and the following disclaimer in the
21: * documentation and/or other materials provided with the distribution.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.9 deraadt 33: */
1.1 deraadt 34:
1.21 ! markus 35: /* RCSID("$OpenBSD: cipher.h,v 1.20 2000/10/11 20:27:23 markus Exp $"); */
1.1 deraadt 36:
37: #ifndef CIPHER_H
38: #define CIPHER_H
39:
1.15 markus 40: #include <openssl/des.h>
41: #include <openssl/blowfish.h>
42: #include <openssl/rc4.h>
43: #include <openssl/cast.h>
1.20 markus 44: /*
45: * Cipher types for SSH-1. New types can be added, but old types should not
46: * be removed for compatibility. The maximum allowed value is 31.
47: */
48: #define SSH_CIPHER_SSH2 -3
1.17 markus 49: #define SSH_CIPHER_ILLEGAL -2 /* No valid cipher selected. */
1.9 deraadt 50: #define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
51: #define SSH_CIPHER_NONE 0 /* no encryption */
52: #define SSH_CIPHER_IDEA 1 /* IDEA CFB */
53: #define SSH_CIPHER_DES 2 /* DES CBC */
54: #define SSH_CIPHER_3DES 3 /* 3DES CBC */
55: #define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
56: #define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
1.1 deraadt 57: #define SSH_CIPHER_BLOWFISH 6
1.12 markus 58: #define SSH_CIPHER_RESERVED 7
1.20 markus 59: #define SSH_CIPHER_MAX 31
1.12 markus 60:
1.20 markus 61: typedef struct Cipher Cipher;
62: typedef struct CipherContext CipherContext;
1.1 deraadt 63:
1.20 markus 64: struct CipherContext {
1.9 deraadt 65: union {
66: struct {
1.20 markus 67: des_key_schedule key;
68: des_cblock iv;
69: } des;
70: struct {
1.9 deraadt 71: des_key_schedule key1;
72: des_key_schedule key2;
73: des_cblock iv2;
74: des_key_schedule key3;
75: des_cblock iv3;
76: } des3;
77: struct {
78: struct bf_key_st key;
1.20 markus 79: u_char iv[8];
1.9 deraadt 80: } bf;
1.12 markus 81: struct {
82: CAST_KEY key;
1.20 markus 83: u_char iv[8];
1.12 markus 84: } cast;
85: RC4_KEY rc4;
1.9 deraadt 86: } u;
1.20 markus 87: Cipher *cipher;
88: };
89: struct Cipher {
90: char *name;
91: int number; /* for ssh1 only */
92: u_int block_size;
93: u_int key_len;
94: void (*setkey)(CipherContext *, const u_char *, u_int);
95: void (*setiv)(CipherContext *, const u_char *, u_int);
96: void (*encrypt)(CipherContext *, u_char *, const u_char *, u_int);
97: void (*decrypt)(CipherContext *, u_char *, const u_char *, u_int);
98: };
99:
1.21 ! markus 100: unsigned int cipher_mask_ssh1(int client);
1.20 markus 101: Cipher *cipher_by_name(const char *name);
102: Cipher *cipher_by_number(int id);
103: int cipher_number(const char *name);
104: char *cipher_name(int id);
105: int ciphers_valid(const char *names);
106: void cipher_init(CipherContext *, Cipher *, const u_char *, u_int, const u_char *, u_int);
107: void cipher_encrypt(CipherContext *context, u_char *dest, const u_char *src, u_int len);
108: void cipher_decrypt(CipherContext *context, u_char *dest, const u_char *src, u_int len);
109: void cipher_set_key_string(CipherContext *context, Cipher *cipher, const char *passphrase);
1.1 deraadt 110:
1.9 deraadt 111: #endif /* CIPHER_H */
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