1 /* $NetBSD: ssh.h,v 1.3 2010/11/21 18:29:49 adam Exp $ */ 2 /* $OpenBSD: ssh.h,v 1.79 2010/06/25 07:14:46 djm Exp $ */ 3 4 /* 5 * Author: Tatu Ylonen <ylo@cs.hut.fi> 6 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 7 * All rights reserved 8 * 9 * As far as I am concerned, the code I have written for this software 10 * can be used freely for any purpose. Any derived versions of this 11 * software must be clearly marked as such, and if the derived work is 12 * incompatible with the protocol description in the RFC file, it must be 13 * called by a name other than "ssh" or "Secure Shell". 14 */ 15 16 /* Cipher used for encrypting authentication files. */ 17 #define SSH_AUTHFILE_CIPHER SSH_CIPHER_3DES 18 19 /* Default port number. */ 20 #define SSH_DEFAULT_PORT 22 21 22 /* 23 * Maximum number of RSA authentication identity files that can be specified 24 * in configuration files or on the command line. 25 */ 26 #define SSH_MAX_IDENTITY_FILES 100 27 28 /* 29 * Maximum length of lines in authorized_keys file. 30 * Current value permits 16kbit RSA and RSA1 keys and 8kbit DSA keys, with 31 * some room for options and comments. 32 */ 33 #define SSH_MAX_PUBKEY_BYTES 8192 34 35 /* 36 * Major protocol version. Different version indicates major incompatibility 37 * that prevents communication. 38 * 39 * Minor protocol version. Different version indicates minor incompatibility 40 * that does not prevent interoperation. 41 */ 42 #define PROTOCOL_MAJOR_1 1 43 #define PROTOCOL_MINOR_1 5 44 45 /* We support both SSH1 and SSH2 */ 46 #define PROTOCOL_MAJOR_2 2 47 #define PROTOCOL_MINOR_2 0 48 49 /* 50 * Name for the service. The port named by this service overrides the 51 * default port if present. 52 */ 53 #define SSH_SERVICE_NAME "ssh" 54 55 /* 56 * Name of the environment variable containing the process ID of the 57 * authentication agent. 58 */ 59 #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID" 60 61 /* 62 * Name of the environment variable containing the pathname of the 63 * authentication socket. 64 */ 65 #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK" 66 67 /* 68 * Environment variable for overwriting the default location of askpass 69 */ 70 #define SSH_ASKPASS_ENV "SSH_ASKPASS" 71 72 /* 73 * Force host key length and server key length to differ by at least this 74 * many bits. This is to make double encryption with rsaref work. 75 */ 76 #define SSH_KEY_BITS_RESERVED 128 77 78 /* 79 * Length of the session key in bytes. (Specified as 256 bits in the 80 * protocol.) 81 */ 82 #define SSH_SESSION_KEY_LENGTH 32 83 84 /* Used to identify ``EscapeChar none'' */ 85 #define SSH_ESCAPECHAR_NONE -2 86 87 /* Name of Kerberos service for SSH to use. */ 88 #define KRB4_SERVICE_NAME "rcmd" 89 90 /* 91 * unprivileged user when UsePrivilegeSeparation=yes; 92 * sshd will change its privileges to this user and its 93 * primary group. 94 */ 95 #define SSH_PRIVSEP_USER "sshd" 96 97 /* Minimum modulus size (n) for RSA keys. */ 98 #define SSH_RSA_MINIMUM_MODULUS_SIZE 768 99 100 /* Listen backlog for sshd, ssh-agent and forwarding sockets */ 101 #define SSH_LISTEN_BACKLOG 128 102