.\" $OpenBSD: ssh-add.1,v 1.40 2003/11/25 23:10:08 matthieu Exp $ .\" .\" -*- nroff -*- .\" .\" Author: Tatu Ylonen <firstname.lastname@example.org> .\" Copyright (c) 1995 Tatu Ylonen <email@example.com>, Espoo, Finland .\" All rights reserved .\" .\" As far as I am concerned, the code I have written for this software .\" can be used freely for any purpose. Any derived versions of this .\" software must be clearly marked as such, and if the derived work is .\" incompatible with the protocol description in the RFC file, it must be .\" called by a name other than "ssh" or "Secure Shell". .\" .\" .\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved. .\" Copyright (c) 1999 Aaron Campbell. All rights reserved. .\" Copyright (c) 1999 Theo de Raadt. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd September 25, 1999 .Dt SSH-ADD 1 .Os .Sh NAME .Nm ssh-add .Nd adds RSA or DSA identities to the authentication agent .Sh SYNOPSIS .Nm ssh-add .Op Fl lLdDxXc .Op Fl t Ar life .Op Ar .Nm ssh-add .Fl s Ar reader .Nm ssh-add .Fl e Ar reader .Sh DESCRIPTION .Nm adds RSA or DSA identities to the authentication agent, .Xr ssh-agent 1 . When run without arguments, it adds the files .Pa $HOME/.ssh/id_rsa , .Pa $HOME/.ssh/id_dsa and .Pa $HOME/.ssh/identity . Alternative file names can be given on the command line. If any file requires a passphrase, .Nm asks for the passphrase from the user. The passphrase is read from the user's tty. .Nm retries the last passphrase if multiple identity files are given. .Pp The authentication agent must be running and the .Ev SSH_AUTH_SOCK environment variable must contain the name of its socket for .Nm to work. .Pp The options are as follows: .Bl -tag -width Ds .It Fl l Lists fingerprints of all identities currently represented by the agent. .It Fl L Lists public key parameters of all identities currently represented by the agent. .It Fl d Instead of adding the identity, removes the identity from the agent. .It Fl D Deletes all identities from the agent. .It Fl x Lock the agent with a password. .It Fl X Unlock the agent. .It Fl t Ar life Set a maximum lifetime when adding identities to an agent. The lifetime may be specified in seconds or in a time format specified in .Xr sshd_config 5 . .It Fl c Indicates that added identities should be subject to confirmation before being used for authentication. Confirmation is performed by the .Ev SSH_ASKPASS program mentioned below. Successful confirmation is signaled by a zero exit status from the .Ev SSH_ASKPASS program, rather than text entered into the requester. .It Fl s Ar reader Add key in smartcard .Ar reader . .It Fl e Ar reader Remove key in smartcard .Ar reader . .El .Sh ENVIRONMENT .Bl -tag -width Ds .It Ev "DISPLAY" and "SSH_ASKPASS" If .Nm needs a passphrase, it will read the passphrase from the current terminal if it was run from a terminal. If .Nm does not have a terminal associated with it but .Ev DISPLAY and .Ev SSH_ASKPASS are set, it will execute the program specified by .Ev SSH_ASKPASS and open an X11 window to read the passphrase. This is particularly useful when calling .Nm from a .Pa .Xsession or related script. (Note that on some machines it may be necessary to redirect the input from .Pa /dev/null to make this work.) .It Ev SSH_AUTH_SOCK Identifies the path of a unix-domain socket used to communicate with the agent. .El .Sh FILES .Bl -tag -width Ds .It Pa $HOME/.ssh/identity Contains the protocol version 1 RSA authentication identity of the user. .It Pa $HOME/.ssh/id_dsa Contains the protocol version 2 DSA authentication identity of the user. .It Pa $HOME/.ssh/id_rsa Contains the protocol version 2 RSA authentication identity of the user. .El .Pp Identity files should not be readable by anyone but the user. Note that .Nm ignores identity files if they are accessible by others. .Sh DIAGNOSTICS Exit status is 0 on success, 1 if the specified command fails, and 2 if .Nm is unable to contact the authentication agent. .Sh SEE ALSO .Xr ssh 1 , .Xr ssh-agent 1 , .Xr ssh-keygen 1 , .Xr sshd 8 .Sh AUTHORS OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen. Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH. Markus Friedl contributed the support for SSH protocol versions 1.5 and 2.0.