1 /* $OpenBSD: ssh.h,v 1.75 2003/12/02 17:01:15 markus 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 * Major protocol version. Different version indicates major incompatibility 44 * that prevents communication. 45 * 46 * Minor protocol version. Different version indicates minor incompatibility 47 * that does not prevent interoperation. 48 */ 49 #define PROTOCOL_MAJOR_1 1 50 #define PROTOCOL_MINOR_1 5 51 52 /* We support both SSH1 and SSH2 */ 53 #define PROTOCOL_MAJOR_2 2 54 #define PROTOCOL_MINOR_2 0 55 56 /* 57 * Name for the service. The port named by this service overrides the 58 * default port if present. 59 */ 60 #define SSH_SERVICE_NAME "ssh" 61 62 /* 63 * Name of the environment variable containing the process ID of the 64 * authentication agent. 65 */ 66 #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID" 67 68 /* 69 * Name of the environment variable containing the pathname of the 70 * authentication socket. 71 */ 72 #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK" 73 74 /* 75 * Environment variable for overwriting the default location of askpass 76 */ 77 #define SSH_ASKPASS_ENV "SSH_ASKPASS" 78 79 /* 80 * Force host key length and server key length to differ by at least this 81 * many bits. This is to make double encryption with rsaref work. 82 */ 83 #define SSH_KEY_BITS_RESERVED 128 84 85 /* 86 * Length of the session key in bytes. (Specified as 256 bits in the 87 * protocol.) 88 */ 89 #define SSH_SESSION_KEY_LENGTH 32 90 91 /* Used to identify ``EscapeChar none'' */ 92 #define SSH_ESCAPECHAR_NONE -2 93 94 /* 95 * unprivileged user when UsePrivilegeSeparation=yes; 96 * sshd will change its privileges to this user and its 97 * primary group. 98 */ 99 #ifndef SSH_PRIVSEP_USER 100 #define SSH_PRIVSEP_USER "sshd" 101 #endif 102 103 /* Minimum modulus size (n) for RSA keys. */ 104 #define SSH_RSA_MINIMUM_MODULUS_SIZE 768 105 106 /* Listen backlog for sshd, ssh-agent and forwarding sockets */ 107 #define SSH_LISTEN_BACKLOG 128 108 109 #endif /* SSH_H */ 110