1 .\" $OpenBSD: ssh-add.1,v 1.39 2003/06/10 09:12:11 jmc Exp $
5 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
6 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
7 .\" All rights reserved
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".
16 .\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
17 .\" Copyright (c) 1999 Aaron Campbell. All rights reserved.
18 .\" Copyright (c) 1999 Theo de Raadt. All rights reserved.
20 .\" Redistribution and use in source and binary forms, with or without
21 .\" modification, are permitted provided that the following conditions
23 .\" 1. Redistributions of source code must retain the above copyright
24 .\" notice, this list of conditions and the following disclaimer.
25 .\" 2. Redistributions in binary form must reproduce the above copyright
26 .\" notice, this list of conditions and the following disclaimer in the
27 .\" documentation and/or other materials provided with the distribution.
29 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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40 .Dd September 25, 1999
45 .Nd adds RSA or DSA identities to the authentication agent
57 adds RSA or DSA identities to the authentication agent,
59 When run without arguments, it adds the files
60 .Pa $HOME/.ssh/id_rsa ,
63 .Pa $HOME/.ssh/identity .
64 Alternative file names can be given on the command line.
65 If any file requires a passphrase,
67 asks for the passphrase from the user.
68 The passphrase is read from the user's tty.
70 retries the last passphrase if multiple identity files are given.
72 The authentication agent must be running and must be an ancestor of
73 the current process for
77 The options are as follows:
80 Lists fingerprints of all identities currently represented by the agent.
82 Lists public key parameters of all identities currently represented by the agent.
84 Instead of adding the identity, removes the identity from the agent.
86 Deletes all identities from the agent.
88 Lock the agent with a password.
92 Set a maximum lifetime when adding identities to an agent.
93 The lifetime may be specified in seconds or in a time format
97 Indicates that added identities should be subject to confirmation before
98 being used for authentication.
99 Confirmation is performed by the
101 program mentioned below.
102 Successful confirmation is signaled by a zero exit status from the
104 program, rather than text entered into the requester.
109 Remove key in smartcard
114 .It Ev "DISPLAY" and "SSH_ASKPASS"
117 needs a passphrase, it will read the passphrase from the current
118 terminal if it was run from a terminal.
121 does not have a terminal associated with it but
125 are set, it will execute the program specified by
127 and open an X11 window to read the passphrase.
128 This is particularly useful when calling
133 (Note that on some machines it
134 may be necessary to redirect the input from
138 Identifies the path of a unix-domain socket used to communicate with the
143 .It Pa $HOME/.ssh/identity
144 Contains the protocol version 1 RSA authentication identity of the user.
145 .It Pa $HOME/.ssh/id_dsa
146 Contains the protocol version 2 DSA authentication identity of the user.
147 .It Pa $HOME/.ssh/id_rsa
148 Contains the protocol version 2 RSA authentication identity of the user.
151 Identity files should not be readable by anyone but the user.
154 ignores identity files if they are accessible by others.
156 Exit status is 0 on success, 1 if the specified command fails,
159 is unable to contact the authentication agent.
166 OpenSSH is a derivative of the original and free
167 ssh 1.2.12 release by Tatu Ylonen.
168 Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
169 Theo de Raadt and Dug Song
170 removed many bugs, re-added newer features and
172 Markus Friedl contributed the support for SSH
173 protocol versions 1.5 and 2.0.