e7e0b34988
several new kerberos related libraries and applications to FreeBSD:
o kgetcred(1) allows one to manually get a ticket for a particular service.
o kf(1) securily forwards ticket to another host through an authenticated
and encrypted stream.
o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1)
and other user kerberos operations. klist and kswitch are just symlinks
to kcc(1) now.
o kswitch(1) allows you to easily switch between kerberos credentials if
you're running KCM.
o hxtool(1) is a certificate management tool to use with PKINIT.
o string2key(1) maps a password into key.
o kdigest(8) is a userland tool to access the KDC's digest interface.
o kimpersonate(8) creates a "fake" ticket for a service.
We also now install manpages for some lirbaries that were not installed
before, libheimntlm and libhx509.
- The new HEIMDAL version no longer supports Kerberos 4. All users are
recommended to switch to Kerberos 5.
- Weak ciphers are now disabled by default. To enable DES support (used
by telnet(8)), use "allow_weak_crypto" option in krb5.conf.
- libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings
disabled due to the function they use (krb5_get_err_text(3)) being
deprecated. I plan to work on this next.
- Heimdal's KDC now require sqlite to operate. We use the bundled version
and install it as libheimsqlite. If some other FreeBSD components will
require it in the future we can rename it to libbsdsqlite and use for these
components as well.
- This is not a latest Heimdal version, the new one was released while I was
working on the update. I will update it to 1.5.2 soon, as it fixes some
important bugs and security issues.
108 lines
4.1 KiB
Groff
108 lines
4.1 KiB
Groff
.\" Copyright (c) 2000 Kungliga Tekniska Högskolan
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.\" (Royal Institute of Technology, Stockholm, Sweden).
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" 3. Neither the name of the Institute nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id$
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.\"
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.Dd September 1, 2000
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.Dt KERBEROS 8
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.Os HEIMDAL
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.Sh NAME
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.Nm kerberos
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.Nd introduction to the Kerberos system
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.Sh DESCRIPTION
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Kerberos is a network authentication system. Its purpose is to
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securely authenticate users and services in an insecure network
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environment.
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.Pp
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This is done with a Kerberos server acting as a trusted third party,
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keeping a database with secret keys for all users and services
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(collectively called
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.Em principals ) .
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.Pp
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Each principal belongs to exactly one
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.Em realm ,
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which is the administrative domain in Kerberos. A realm usually
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corresponds to an organisation, and the realm should normally be
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derived from that organisation's domain name. A realm is served by one
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or more Kerberos servers.
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.Pp
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The authentication process involves exchange of
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.Sq tickets
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and
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.Sq authenticators
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which together prove the principal's identity.
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.Pp
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When you login to the Kerberos system, either through the normal
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system login or with the
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.Xr kinit 1
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program, you acquire a
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.Em ticket granting ticket
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which allows you to get new tickets for other services, such as
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.Ic telnet
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or
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.Ic ftp ,
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without giving your password.
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.Pp
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For more information on how Kerberos works, and other general Kerberos
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questions see the Kerberos FAQ at
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.Pa http://www.nrl.navy.mil/CCS/people/kenh/kerberos-faq.html .
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.Pp
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For setup instructions see the Heimdal Texinfo manual.
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.Sh SEE ALSO
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.Xr ftp 1 ,
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.Xr kdestroy 1 ,
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.Xr kinit 1 ,
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.Xr klist 1 ,
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.Xr kpasswd 1 ,
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.Xr telnet 1
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.Sh HISTORY
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The Kerberos authentication system was developed in the late 1980's as
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part of the Athena Project at the Massachusetts Institute of
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Technology. Versions one through three never reached outside MIT, but
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version 4 was (and still is) quite popular, especially in the academic
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community, but is also used in commercial products like the AFS
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filesystem.
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.Pp
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The problems with version 4 are that it has many limitations, the code
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was not too well written (since it had been developed over a long
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time), and it has a number of known security problems. To resolve many
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of these issues work on version five started, and resulted in IETF RFC
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1510 in 1993. IETF RFC 1510 was obsoleted in 2005 with IETF RFC 4120,
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also known as Kerberos clarifications. With the arrival of IETF RFC
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4120, the work on adding extensibility and internationalization have
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started (Kerberos extensions), and a new RFC will hopefully appear
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soon.
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.Pp
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This manual page is part of the
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.Nm Heimdal
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Kerberos 5 distribution, which has been in development at the Royal
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Institute of Technology in Stockholm, Sweden, since about 1997.
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