1 /* $OpenBSD: ssh.h,v 1.88 2018/06/06 18:29:18 markus Exp $ */
4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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".
15 /* Cipher used for encrypting authentication files. */
16 #define SSH_AUTHFILE_CIPHER SSH_CIPHER_3DES
18 /* Default port number. */
19 #define SSH_DEFAULT_PORT 22
22 * Maximum number of certificate files that can be specified
23 * in configuration files or on the command line.
25 #define SSH_MAX_CERTIFICATE_FILES 100
28 * Maximum number of RSA authentication identity files that can be specified
29 * in configuration files or on the command line.
31 #define SSH_MAX_IDENTITY_FILES 100
34 * Major protocol version. Different version indicates major incompatibility
35 * that prevents communication.
37 * Minor protocol version. Different version indicates minor incompatibility
38 * that does not prevent interoperation.
40 #define PROTOCOL_MAJOR_1 1
41 #define PROTOCOL_MINOR_1 5
43 /* We support only SSH2 */
44 #define PROTOCOL_MAJOR_2 2
45 #define PROTOCOL_MINOR_2 0
48 * Name for the service. The port named by this service overrides the
49 * default port if present.
51 #define SSH_SERVICE_NAME "ssh"
54 * Name of the environment variable containing the process ID of the
55 * authentication agent.
57 #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID"
60 * Name of the environment variable containing the pathname of the
61 * authentication socket.
63 #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK"
66 * Environment variable for overwriting the default location of askpass
68 #define SSH_ASKPASS_ENV "SSH_ASKPASS"
71 * Force host key length and server key length to differ by at least this
72 * many bits. This is to make double encryption with rsaref work.
74 #define SSH_KEY_BITS_RESERVED 128
77 * Length of the session key in bytes. (Specified as 256 bits in the
80 #define SSH_SESSION_KEY_LENGTH 32
82 /* Used to identify ``EscapeChar none'' */
83 #define SSH_ESCAPECHAR_NONE -2
86 * unprivileged user when UsePrivilegeSeparation=yes;
87 * sshd will change its privileges to this user and its
90 #ifndef SSH_PRIVSEP_USER
91 #define SSH_PRIVSEP_USER "sshd"
94 /* Listen backlog for sshd, ssh-agent and forwarding sockets */
95 #define SSH_LISTEN_BACKLOG 128