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.
173 lines
5.6 KiB
Groff
173 lines
5.6 KiB
Groff
.\" Copyright (c) 2003 - 2005 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 April 20, 2005
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.Dt GSSAPI 3
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.Os
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.Sh NAME
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.Nm gssapi
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.Nd Generic Security Service Application Program Interface library
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.Sh LIBRARY
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GSS-API Library (libgssapi, -lgssapi)
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.Sh DESCRIPTION
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The Generic Security Service Application Program Interface (GSS-API)
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provides security services to callers in a generic fashion,
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supportable with a range of underlying mechanisms and technologies and
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hence allowing source-level portability of applications to different
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environments.
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.Pp
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The GSS-API implementation in Heimdal implements the Kerberos 5 and
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the SPNEGO GSS-API security mechanisms.
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.Sh LIST OF FUNCTIONS
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These functions constitute the gssapi library,
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.Em libgssapi .
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Declarations for these functions may be obtained from the include file
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.Pa gssapi.h .
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.Bl -column -compact
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.It Sy Name/Page
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.It Xr gss_accept_sec_context 3
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.It Xr gss_acquire_cred 3
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.It Xr gss_add_cred 3
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.It Xr gss_add_oid_set_member 3
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.It Xr gss_canonicalize_name 3
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.It Xr gss_compare_name 3
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.It Xr gss_context_time 3
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.It Xr gss_create_empty_oid_set 3
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.It Xr gss_delete_sec_context 3
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.It Xr gss_display_name 3
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.It Xr gss_display_status 3
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.It Xr gss_duplicate_name 3
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.It Xr gss_export_name 3
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.It Xr gss_export_sec_context 3
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.It Xr gss_get_mic 3
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.It Xr gss_import_name 3
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.It Xr gss_import_sec_context 3
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.It Xr gss_indicate_mechs 3
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.It Xr gss_init_sec_context 3
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.It Xr gss_inquire_context 3
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.It Xr gss_inquire_cred 3
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.It Xr gss_inquire_cred_by_mech 3
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.It Xr gss_inquire_mechs_for_name 3
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.It Xr gss_inquire_names_for_mech 3
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.It Xr gss_krb5_ccache_name 3
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.It Xr gss_krb5_compat_des3_mic 3
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.It Xr gss_krb5_copy_ccache 3
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.It Xr gss_krb5_extract_authz_data_from_sec_context 3
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.It Xr gss_krb5_import_ccache 3
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.It Xr gss_process_context_token 3
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.It Xr gss_release_buffer 3
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.It Xr gss_release_cred 3
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.It Xr gss_release_name 3
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.It Xr gss_release_oid_set 3
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.It Xr gss_seal 3
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.It Xr gss_sign 3
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.It Xr gss_test_oid_set_member 3
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.It Xr gss_unseal 3
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.It Xr gss_unwrap 3
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.It Xr gss_verify 3
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.It Xr gss_verify_mic 3
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.It Xr gss_wrap 3
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.It Xr gss_wrap_size_limit 3
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.El
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.Sh COMPATIBILITY
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The
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.Nm Heimdal
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GSS-API implementation had a bug in releases before 0.6 that made it
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fail to inter-operate when using DES3 with other GSS-API
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implementations when using
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.Fn gss_get_mic
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/
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.Fn gss_verify_mic .
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It is possible to modify the behavior of the generator of the MIC with
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the
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.Pa krb5.conf
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configuration file so that old clients/servers will still
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work.
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.Pp
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New clients/servers will try both the old and new MIC in Heimdal 0.6.
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In 0.7 it will check only if configured - the compatibility code will
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be removed in 0.8.
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.Pp
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Heimdal 0.6 still generates by default the broken GSS-API DES3 mic,
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this will change in 0.7 to generate correct des3 mic.
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.Pp
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To turn on compatibility with older clients and servers, change the
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.Nm [gssapi]
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.Ar broken_des3_mic
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in
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.Pa krb5.conf
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that contains a list of globbing expressions that will be matched
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against the server name.
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To turn off generation of the old (incompatible) mic of the MIC use
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.Nm [gssapi]
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.Ar correct_des3_mic .
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.Pp
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If a match for a entry is in both
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.Nm [gssapi]
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.Ar correct_des3_mic
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and
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.Nm [gssapi]
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.Ar broken_des3_mic ,
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the later will override.
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.Pp
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This config option modifies behaviour for both clients and servers.
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.Pp
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Microsoft implemented SPNEGO to Windows2000, however, they managed to
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get it wrong, their implementation didn't fill in the MechListMIC in
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the reply token with the right content.
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There is a work around for this problem, but not all implementation
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support it.
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.Pp
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Heimdal defaults to correct SPNEGO when the the kerberos
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implementation uses CFX, or when it is configured by the user.
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To turn on compatibility with peers, use option
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.Nm [gssapi]
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.Ar require_mechlist_mic .
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.Sh EXAMPLES
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.Bd -literal -offset indent
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[gssapi]
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broken_des3_mic = cvs/*@SU.SE
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broken_des3_mic = host/*@E.KTH.SE
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correct_des3_mic = host/*@SU.SE
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require_mechlist_mic = host/*@SU.SE
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.Ed
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.Sh BUGS
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All of 0.5.x versions of
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.Nm heimdal
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had broken token delegations in the client side, the server side was
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correct.
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.Sh SEE ALSO
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.Xr krb5 3 ,
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.Xr krb5.conf 5 ,
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.Xr kerberos 8
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