1 /* $OpenBSD: ssh.h,v 1.89 2018/12/27 03:25:25 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 /* 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 /* 22 * Maximum number of certificate files that can be specified 23 * in configuration files or on the command line. 24 */ 25 #define SSH_MAX_CERTIFICATE_FILES 100 26 27 /* 28 * Maximum number of RSA authentication identity files that can be specified 29 * in configuration files or on the command line. 30 */ 31 #define SSH_MAX_IDENTITY_FILES 100 32 33 /* 34 * Major protocol version. Different version indicates major incompatibility 35 * that prevents communication. 36 * 37 * Minor protocol version. Different version indicates minor incompatibility 38 * that does not prevent interoperation. 39 */ 40 #define PROTOCOL_MAJOR_1 1 41 #define PROTOCOL_MINOR_1 5 42 43 /* We support only SSH2 */ 44 #define PROTOCOL_MAJOR_2 2 45 #define PROTOCOL_MINOR_2 0 46 47 /* 48 * Name for the service. The port named by this service overrides the 49 * default port if present. 50 */ 51 #define SSH_SERVICE_NAME "ssh" 52 53 /* 54 * Name of the environment variable containing the process ID of the 55 * authentication agent. 56 */ 57 #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID" 58 59 /* 60 * Name of the environment variable containing the pathname of the 61 * authentication socket. 62 */ 63 #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK" 64 65 /* 66 * Environment variable for overwriting the default location of askpass 67 */ 68 #define SSH_ASKPASS_ENV "SSH_ASKPASS" 69 70 /* 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. 73 */ 74 #define SSH_KEY_BITS_RESERVED 128 75 76 /* 77 * Length of the session key in bytes. (Specified as 256 bits in the 78 * protocol.) 79 */ 80 #define SSH_SESSION_KEY_LENGTH 32 81 82 /* Used to identify ``EscapeChar none'' */ 83 #define SSH_ESCAPECHAR_NONE -2 84 85 /* 86 * unprivileged user when UsePrivilegeSeparation=yes; 87 * sshd will change its privileges to this user and its 88 * primary group. 89 */ 90 #ifndef SSH_PRIVSEP_USER 91 #define SSH_PRIVSEP_USER "sshd" 92 #endif 93 94 /* Listen backlog for sshd, ssh-agent and forwarding sockets */ 95 #define SSH_LISTEN_BACKLOG 128 96 97 /* Limits for banner exchange */ 98 #define SSH_MAX_BANNER_LEN 8192 99 #define SSH_MAX_PRE_BANNER_LINES 1024 100