1 .\" $OpenBSD: ssh-add.1,v 1.52 2010/03/05 10:28:21 djm 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.
32 .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 .Dd $Mdocdate: March 5 2010 $
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
64 After loading a private key,
66 will try to load corresponding certificate information from the
67 filename obtained by appending
69 to the name of the private key file.
70 Alternative file names can be given on the command line.
72 If any file requires a passphrase,
74 asks for the passphrase from the user.
75 The passphrase is read from the user's tty.
77 retries the last passphrase if multiple identity files are given.
79 The authentication agent must be running and the
81 environment variable must contain the name of its socket for
85 The options are as follows:
88 Indicates that added identities should be subject to confirmation before
89 being used for authentication.
90 Confirmation is performed by the
92 program mentioned below.
93 Successful confirmation is signaled by a zero exit status from the
95 program, rather than text entered into the requester.
97 Deletes all identities from the agent.
99 Instead of adding identities, removes identities from the agent.
102 has been run without arguments, the keys for the default identities will
104 Otherwise, the argument list will be interpreted as a list of paths to
105 public key files and matching keys will be removed from the agent.
106 If no public key is found at a given path,
112 Remove keys provided by the PKCS#11 shared library
115 Lists public key parameters of all identities currently represented
118 Lists fingerprints of all identities currently represented by the agent.
120 Add keys provided by the PKCS#11 shared library
123 Set a maximum lifetime when adding identities to an agent.
124 The lifetime may be specified in seconds or in a time format
130 Lock the agent with a password.
134 .It Ev "DISPLAY" and "SSH_ASKPASS"
137 needs a passphrase, it will read the passphrase from the current
138 terminal if it was run from a terminal.
141 does not have a terminal associated with it but
145 are set, it will execute the program specified by
147 and open an X11 window to read the passphrase.
148 This is particularly useful when calling
153 (Note that on some machines it
154 may be necessary to redirect the input from
158 Identifies the path of a
160 socket used to communicate with the agent.
164 .It Pa ~/.ssh/identity
165 Contains the protocol version 1 RSA authentication identity of the user.
167 Contains the protocol version 2 DSA authentication identity of the user.
169 Contains the protocol version 2 RSA authentication identity of the user.
172 Identity files should not be readable by anyone but the user.
175 ignores identity files if they are accessible by others.
177 Exit status is 0 on success, 1 if the specified command fails,
180 is unable to contact the authentication agent.
187 OpenSSH is a derivative of the original and free
188 ssh 1.2.12 release by Tatu Ylonen.
189 Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
190 Theo de Raadt and Dug Song
191 removed many bugs, re-added newer features and
193 Markus Friedl contributed the support for SSH
194 protocol versions 1.5 and 2.0.