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1 | /* $OpenBSD: ssh.h,v 1.78 2006/08/03 03:34:42 deraadt Exp $ */ | |
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 | ||
15 | /* Cipher used for encrypting authentication files. */ | |
16 | #define SSH_AUTHFILE_CIPHER SSH_CIPHER_3DES | |
17 | ||
18 | /* Default port number. */ | |
19 | #define SSH_DEFAULT_PORT 22 | |
20 | ||
21 | /* Maximum number of TCP/IP ports forwarded per direction. */ | |
22 | #define SSH_MAX_FORWARDS_PER_DIRECTION 100 | |
23 | ||
24 | /* | |
25 | * Maximum number of RSA authentication identity files that can be specified | |
26 | * in configuration files or on the command line. | |
27 | */ | |
28 | #define SSH_MAX_IDENTITY_FILES 100 | |
29 | ||
30 | /* | |
31 | * Maximum length of lines in authorized_keys file. | |
32 | * Current value permits 16kbit RSA and RSA1 keys and 8kbit DSA keys, with | |
33 | * some room for options and comments. | |
34 | */ | |
35 | #define SSH_MAX_PUBKEY_BYTES 8192 | |
36 | ||
37 | /* | |
38 | * Major protocol version. Different version indicates major incompatibility | |
39 | * that prevents communication. | |
40 | * | |
41 | * Minor protocol version. Different version indicates minor incompatibility | |
42 | * that does not prevent interoperation. | |
43 | */ | |
44 | #define PROTOCOL_MAJOR_1 1 | |
45 | #define PROTOCOL_MINOR_1 5 | |
46 | ||
47 | /* We support both SSH1 and SSH2 */ | |
48 | #define PROTOCOL_MAJOR_2 2 | |
49 | #define PROTOCOL_MINOR_2 0 | |
50 | ||
51 | /* | |
52 | * Name for the service. The port named by this service overrides the | |
53 | * default port if present. | |
54 | */ | |
55 | #define SSH_SERVICE_NAME "ssh" | |
56 | ||
57 | /* | |
58 | * Name of the environment variable containing the process ID of the | |
59 | * authentication agent. | |
60 | */ | |
61 | #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID" | |
62 | ||
63 | /* | |
64 | * Name of the environment variable containing the pathname of the | |
65 | * authentication socket. | |
66 | */ | |
67 | #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK" | |
68 | ||
69 | /* | |
70 | * Environment variable for overwriting the default location of askpass | |
71 | */ | |
72 | #define SSH_ASKPASS_ENV "SSH_ASKPASS" | |
73 | ||
74 | /* | |
75 | * Force host key length and server key length to differ by at least this | |
76 | * many bits. This is to make double encryption with rsaref work. | |
77 | */ | |
78 | #define SSH_KEY_BITS_RESERVED 128 | |
79 | ||
80 | /* | |
81 | * Length of the session key in bytes. (Specified as 256 bits in the | |
82 | * protocol.) | |
83 | */ | |
84 | #define SSH_SESSION_KEY_LENGTH 32 | |
85 | ||
86 | /* Used to identify ``EscapeChar none'' */ | |
87 | #define SSH_ESCAPECHAR_NONE -2 | |
88 | ||
89 | /* | |
90 | * unprivileged user when UsePrivilegeSeparation=yes; | |
91 | * sshd will change its privileges to this user and its | |
92 | * primary group. | |
93 | */ | |
94 | #ifndef SSH_PRIVSEP_USER | |
95 | #define SSH_PRIVSEP_USER "sshd" | |
96 | #endif | |
97 | ||
98 | /* Minimum modulus size (n) for RSA keys. */ | |
99 | #define SSH_RSA_MINIMUM_MODULUS_SIZE 768 | |
100 | ||
101 | /* Listen backlog for sshd, ssh-agent and forwarding sockets */ | |
102 | #define SSH_LISTEN_BACKLOG 128 |