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1 | /* $OpenBSD: ssh.h,v 1.77 2006/03/25 22:22:43 djm 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 | #ifndef SSH_H | |
16 | #define SSH_H | |
17 | ||
18 | #include <netinet/in.h> /* For struct sockaddr_in */ | |
19 | #include <pwd.h> /* For struct pw */ | |
20 | #include <stdarg.h> /* For va_list */ | |
21 | #include <syslog.h> /* For LOG_AUTH and friends */ | |
22 | #include <sys/socket.h> /* For struct sockaddr_storage */ | |
23 | #ifdef HAVE_SYS_SELECT_H | |
24 | # include <sys/select.h> | |
25 | #endif | |
26 | ||
27 | /* Cipher used for encrypting authentication files. */ | |
28 | #define SSH_AUTHFILE_CIPHER SSH_CIPHER_3DES | |
29 | ||
30 | /* Default port number. */ | |
31 | #define SSH_DEFAULT_PORT 22 | |
32 | ||
33 | /* Maximum number of TCP/IP ports forwarded per direction. */ | |
34 | #define SSH_MAX_FORWARDS_PER_DIRECTION 100 | |
35 | ||
36 | /* | |
37 | * Maximum number of RSA authentication identity files that can be specified | |
38 | * in configuration files or on the command line. | |
39 | */ | |
40 | #define SSH_MAX_IDENTITY_FILES 100 | |
41 | ||
42 | /* | |
43 | * Maximum length of lines in authorized_keys file. | |
44 | * Current value permits 16kbit RSA and RSA1 keys and 8kbit DSA keys, with | |
45 | * some room for options and comments. | |
46 | */ | |
47 | #define SSH_MAX_PUBKEY_BYTES 8192 | |
48 | ||
49 | /* | |
50 | * Major protocol version. Different version indicates major incompatibility | |
51 | * that prevents communication. | |
52 | * | |
53 | * Minor protocol version. Different version indicates minor incompatibility | |
54 | * that does not prevent interoperation. | |
55 | */ | |
56 | #define PROTOCOL_MAJOR_1 1 | |
57 | #define PROTOCOL_MINOR_1 5 | |
58 | ||
59 | /* We support both SSH1 and SSH2 */ | |
60 | #define PROTOCOL_MAJOR_2 2 | |
61 | #define PROTOCOL_MINOR_2 0 | |
62 | ||
63 | /* | |
64 | * Name for the service. The port named by this service overrides the | |
65 | * default port if present. | |
66 | */ | |
67 | #define SSH_SERVICE_NAME "ssh" | |
68 | ||
69 | /* | |
70 | * Name of the environment variable containing the process ID of the | |
71 | * authentication agent. | |
72 | */ | |
73 | #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID" | |
74 | ||
75 | /* | |
76 | * Name of the environment variable containing the pathname of the | |
77 | * authentication socket. | |
78 | */ | |
79 | #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK" | |
80 | ||
81 | /* | |
82 | * Environment variable for overwriting the default location of askpass | |
83 | */ | |
84 | #define SSH_ASKPASS_ENV "SSH_ASKPASS" | |
85 | ||
86 | /* | |
87 | * Force host key length and server key length to differ by at least this | |
88 | * many bits. This is to make double encryption with rsaref work. | |
89 | */ | |
90 | #define SSH_KEY_BITS_RESERVED 128 | |
91 | ||
92 | /* | |
93 | * Length of the session key in bytes. (Specified as 256 bits in the | |
94 | * protocol.) | |
95 | */ | |
96 | #define SSH_SESSION_KEY_LENGTH 32 | |
97 | ||
98 | /* Used to identify ``EscapeChar none'' */ | |
99 | #define SSH_ESCAPECHAR_NONE -2 | |
100 | ||
101 | /* | |
102 | * unprivileged user when UsePrivilegeSeparation=yes; | |
103 | * sshd will change its privileges to this user and its | |
104 | * primary group. | |
105 | */ | |
106 | #ifndef SSH_PRIVSEP_USER | |
107 | #define SSH_PRIVSEP_USER "sshd" | |
108 | #endif | |
109 | ||
110 | /* Minimum modulus size (n) for RSA keys. */ | |
111 | #define SSH_RSA_MINIMUM_MODULUS_SIZE 768 | |
112 | ||
113 | /* Listen backlog for sshd, ssh-agent and forwarding sockets */ | |
114 | #define SSH_LISTEN_BACKLOG 128 | |
115 | ||
116 | #endif /* SSH_H */ |