.\" Copyright (c) 1996, 2000 Kungliga Tekniska Högskolan .\" (Royal Institute of Technology, Stockholm, Sweden). .\" 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. .\" .\" 3. Neither the name of the Institute nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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. .\" .\" $Id$ .\" .Dd November 17, 1996 .Dt OTP 1 .Os KTH-KRB .Sh NAME .Nm otp .Nd manages one-time passwords .Sh SYNOPSIS .Nm otp .Op Fl dhlor .Op Fl f Ar algorithm .Op Fl u Ar user .Ar sequence-number .Ar seed .Sh DESCRIPTION The .Nm program initializes and updates your current series of one-time passwords (OTPs). .Pp Use this to set a new series of one-time passwords. Only perform this on the console or over an encrypted link as you will have to supply your pass-phrase. The other two parameters are .Ar sequence-number and .Ar seed . .Pp Options are: .Bl -tag -width Ds .It Fl d To delete a one-time password. .It Fl f Choose a different .Ar algorithm from the default md5. Pick any of: md4, md5, and sha. .It Fl h For getting a help message. .It Fl l List the current table of one-time passwords. .It Fl o To open (unlock) the otp-entry for a user. .It Fl r To renew a one-time password series. This operation can be performed over an potentially eavesdropped link because you do not supply the pass-phrase. First you need to supply the current one-time password and then the new one corresponding to the supplied .Ar sequence-number and .Ar seed . .It Fl u To choose a different .Ar user to set one-time passwords for. This only works when running .Nm as root. .El .Sh SEE ALSO .Xr otpprint 1