crypto/external/bsd/openssh/dist/ssh.h

   1 /*      $NetBSD$        */
   2 /* $OpenBSD: ssh.h,v 1.78 2006/08/03 03:34:42 deraadt 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 /* Maximum number of TCP/IP ports forwarded per direction. */
  23 #define SSH_MAX_FORWARDS_PER_DIRECTION  100
  24
  25 /*
  26  * Maximum number of RSA authentication identity files that can be specified
  27  * in configuration files or on the command line.
  28  */
  29 #define SSH_MAX_IDENTITY_FILES          100
  30
  31 /*
  32  * Maximum length of lines in authorized_keys file.
  33  * Current value permits 16kbit RSA and RSA1 keys and 8kbit DSA keys, with
  34  * some room for options and comments.
  35  */
  36 #define SSH_MAX_PUBKEY_BYTES            8192
  37
  38 /*
  39  * Major protocol version.  Different version indicates major incompatibility
  40  * that prevents communication.
  41  *
  42  * Minor protocol version.  Different version indicates minor incompatibility
  43  * that does not prevent interoperation.
  44  */
  45 #define PROTOCOL_MAJOR_1        1
  46 #define PROTOCOL_MINOR_1        5
  47
  48 /* We support both SSH1 and SSH2 */
  49 #define PROTOCOL_MAJOR_2        2
  50 #define PROTOCOL_MINOR_2        0
  51
  52 /*
  53  * Name for the service.  The port named by this service overrides the
  54  * default port if present.
  55  */
  56 #define SSH_SERVICE_NAME        "ssh"
  57
  58 /*
  59  * Name of the environment variable containing the process ID of the
  60  * authentication agent.
  61  */
  62 #define SSH_AGENTPID_ENV_NAME   "SSH_AGENT_PID"
  63
  64 /*
  65  * Name of the environment variable containing the pathname of the
  66  * authentication socket.
  67  */
  68 #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK"
  69
  70 /*
  71  * Environment variable for overwriting the default location of askpass
  72  */
  73 #define SSH_ASKPASS_ENV         "SSH_ASKPASS"
  74
  75 /*
  76  * Force host key length and server key length to differ by at least this
  77  * many bits.  This is to make double encryption with rsaref work.
  78  */
  79 #define SSH_KEY_BITS_RESERVED           128
  80
  81 /*
  82  * Length of the session key in bytes.  (Specified as 256 bits in the
  83  * protocol.)
  84  */
  85 #define SSH_SESSION_KEY_LENGTH          32
  86
  87 /* Used to identify ``EscapeChar none'' */
  88 #define SSH_ESCAPECHAR_NONE             -2
  89
  90 /* Name of Kerberos service for SSH to use. */
  91 #define KRB4_SERVICE_NAME               "rcmd"
  92
  93 /*
  94  * unprivileged user when UsePrivilegeSeparation=yes;
  95  * sshd will change its privileges to this user and its
  96  * primary group.
  97  */
  98 #define SSH_PRIVSEP_USER                "sshd"
  99
 100 /* Minimum modulus size (n) for RSA keys. */
 101 #define SSH_RSA_MINIMUM_MODULUS_SIZE    768
 102
 103 /* Listen backlog for sshd, ssh-agent and forwarding sockets */
 104 #define SSH_LISTEN_BACKLOG              128