Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1 | /* $OpenBSD: ssh.h,v 1.79 2010/06/25 07:14:46 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 RSA authentication identity files that can be specified |
| 23 | * in configuration files or on the command line. |
| 24 | */ |
| 25 | #define SSH_MAX_IDENTITY_FILES 100 |
| 26 | |
| 27 | /* |
| 28 | * Maximum length of lines in authorized_keys file. |
| 29 | * Current value permits 16kbit RSA and RSA1 keys and 8kbit DSA keys, with |
| 30 | * some room for options and comments. |
| 31 | */ |
| 32 | #define SSH_MAX_PUBKEY_BYTES 8192 |
| 33 | |
| 34 | /* |
| 35 | * Major protocol version. Different version indicates major incompatibility |
| 36 | * that prevents communication. |
| 37 | * |
| 38 | * Minor protocol version. Different version indicates minor incompatibility |
| 39 | * that does not prevent interoperation. |
| 40 | */ |
| 41 | #define PROTOCOL_MAJOR_1 1 |
| 42 | #define PROTOCOL_MINOR_1 5 |
| 43 | |
| 44 | /* We support both SSH1 and SSH2 */ |
| 45 | #define PROTOCOL_MAJOR_2 2 |
| 46 | #define PROTOCOL_MINOR_2 0 |
| 47 | |
| 48 | /* |
| 49 | * Name for the service. The port named by this service overrides the |
| 50 | * default port if present. |
| 51 | */ |
| 52 | #define SSH_SERVICE_NAME "ssh" |
| 53 | |
| 54 | /* |
| 55 | * Name of the environment variable containing the process ID of the |
| 56 | * authentication agent. |
| 57 | */ |
| 58 | #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID" |
| 59 | |
| 60 | /* |
| 61 | * Name of the environment variable containing the pathname of the |
| 62 | * authentication socket. |
| 63 | */ |
| 64 | #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK" |
| 65 | |
| 66 | /* |
| 67 | * Environment variable for overwriting the default location of askpass |
| 68 | */ |
| 69 | #define SSH_ASKPASS_ENV "SSH_ASKPASS" |
| 70 | |
| 71 | /* |
| 72 | * Force host key length and server key length to differ by at least this |
| 73 | * many bits. This is to make double encryption with rsaref work. |
| 74 | */ |
| 75 | #define SSH_KEY_BITS_RESERVED 128 |
| 76 | |
| 77 | /* |
| 78 | * Length of the session key in bytes. (Specified as 256 bits in the |
| 79 | * protocol.) |
| 80 | */ |
| 81 | #define SSH_SESSION_KEY_LENGTH 32 |
| 82 | |
| 83 | /* Used to identify ``EscapeChar none'' */ |
| 84 | #define SSH_ESCAPECHAR_NONE -2 |
| 85 | |
| 86 | /* |
| 87 | * unprivileged user when UsePrivilegeSeparation=yes; |
| 88 | * sshd will change its privileges to this user and its |
| 89 | * primary group. |
| 90 | */ |
| 91 | #ifndef SSH_PRIVSEP_USER |
| 92 | #define SSH_PRIVSEP_USER "sshd" |
| 93 | #endif |
| 94 | |
| 95 | /* Minimum modulus size (n) for RSA keys. */ |
| 96 | #define SSH_RSA_MINIMUM_MODULUS_SIZE 768 |
| 97 | |
| 98 | /* Listen backlog for sshd, ssh-agent and forwarding sockets */ |
| 99 | #define SSH_LISTEN_BACKLOG 128 |