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1 | .\" $OpenBSD: ssh-add.1,v 1.39 2003/06/10 09:12:11 jmc Exp $ | |
2 | .\" | |
3 | .\" -*- nroff -*- | |
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 | .\" 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. | |
19 | .\" | |
20 | .\" Redistribution and use in source and binary forms, with or without | |
21 | .\" modification, are permitted provided that the following conditions | |
22 | .\" are met: | |
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. | |
28 | .\" | |
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. | |
39 | .\" | |
40 | .Dd September 25, 1999 | |
41 | .Dt SSH-ADD 1 | |
42 | .Os | |
43 | .Sh NAME | |
44 | .Nm ssh-add | |
45 | .Nd adds RSA or DSA identities to the authentication agent | |
46 | .Sh SYNOPSIS | |
47 | .Nm ssh-add | |
48 | .Op Fl lLdDxXc | |
49 | .Op Fl t Ar life | |
50 | .Op Ar | |
51 | .Nm ssh-add | |
52 | .Fl s Ar reader | |
53 | .Nm ssh-add | |
54 | .Fl e Ar reader | |
55 | .Sh DESCRIPTION | |
56 | .Nm | |
57 | adds RSA or DSA identities to the authentication agent, | |
58 | .Xr ssh-agent 1 . | |
59 | When run without arguments, it adds the files | |
60 | .Pa $HOME/.ssh/id_rsa , | |
61 | .Pa $HOME/.ssh/id_dsa | |
62 | and | |
63 | .Pa $HOME/.ssh/identity . | |
64 | Alternative file names can be given on the command line. | |
65 | If any file requires a passphrase, | |
66 | .Nm | |
67 | asks for the passphrase from the user. | |
68 | The passphrase is read from the user's tty. | |
69 | .Nm | |
70 | retries the last passphrase if multiple identity files are given. | |
71 | .Pp | |
72 | The authentication agent must be running and must be an ancestor of | |
73 | the current process for | |
74 | .Nm | |
75 | to work. | |
76 | .Pp | |
77 | The options are as follows: | |
78 | .Bl -tag -width Ds | |
79 | .It Fl l | |
80 | Lists fingerprints of all identities currently represented by the agent. | |
81 | .It Fl L | |
82 | Lists public key parameters of all identities currently represented by the agent. | |
83 | .It Fl d | |
84 | Instead of adding the identity, removes the identity from the agent. | |
85 | .It Fl D | |
86 | Deletes all identities from the agent. | |
87 | .It Fl x | |
88 | Lock the agent with a password. | |
89 | .It Fl X | |
90 | Unlock the agent. | |
91 | .It Fl t Ar life | |
92 | Set a maximum lifetime when adding identities to an agent. | |
93 | The lifetime may be specified in seconds or in a time format | |
94 | specified in | |
95 | .Xr sshd_config 5 . | |
96 | .It Fl c | |
97 | Indicates that added identities should be subject to confirmation before | |
98 | being used for authentication. | |
99 | Confirmation is performed by the | |
100 | .Ev SSH_ASKPASS | |
101 | program mentioned below. | |
102 | Successful confirmation is signaled by a zero exit status from the | |
103 | .Ev SSH_ASKPASS | |
104 | program, rather than text entered into the requester. | |
105 | .It Fl s Ar reader | |
106 | Add key in smartcard | |
107 | .Ar reader . | |
108 | .It Fl e Ar reader | |
109 | Remove key in smartcard | |
110 | .Ar reader . | |
111 | .El | |
112 | .Sh ENVIRONMENT | |
113 | .Bl -tag -width Ds | |
114 | .It Ev "DISPLAY" and "SSH_ASKPASS" | |
115 | If | |
116 | .Nm | |
117 | needs a passphrase, it will read the passphrase from the current | |
118 | terminal if it was run from a terminal. | |
119 | If | |
120 | .Nm | |
121 | does not have a terminal associated with it but | |
122 | .Ev DISPLAY | |
123 | and | |
124 | .Ev SSH_ASKPASS | |
125 | are set, it will execute the program specified by | |
126 | .Ev SSH_ASKPASS | |
127 | and open an X11 window to read the passphrase. | |
128 | This is particularly useful when calling | |
129 | .Nm | |
130 | from a | |
131 | .Pa .Xsession | |
132 | or related script. | |
133 | (Note that on some machines it | |
134 | may be necessary to redirect the input from | |
135 | .Pa /dev/null | |
136 | to make this work.) | |
137 | .It Ev SSH_AUTH_SOCK | |
138 | Identifies the path of a unix-domain socket used to communicate with the | |
139 | agent. | |
140 | .El | |
141 | .Sh FILES | |
142 | .Bl -tag -width Ds | |
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. | |
149 | .El | |
150 | .Pp | |
151 | Identity files should not be readable by anyone but the user. | |
152 | Note that | |
153 | .Nm | |
154 | ignores identity files if they are accessible by others. | |
155 | .Sh DIAGNOSTICS | |
156 | Exit status is 0 on success, 1 if the specified command fails, | |
157 | and 2 if | |
158 | .Nm | |
159 | is unable to contact the authentication agent. | |
160 | .Sh SEE ALSO | |
161 | .Xr ssh 1 , | |
162 | .Xr ssh-agent 1 , | |
163 | .Xr ssh-keygen 1 , | |
164 | .Xr sshd 8 | |
165 | .Sh AUTHORS | |
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 | |
171 | created OpenSSH. | |
172 | Markus Friedl contributed the support for SSH | |
173 | protocol versions 1.5 and 2.0. |