ae77177087
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.
160 lines
5.2 KiB
Groff
160 lines
5.2 KiB
Groff
.\" Copyright (c) 2003 - 2004 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 February 29, 2004
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.Dt KADM5_PWCHECK 3
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.Os HEIMDAL
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.Sh NAME
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.Nm krb5_pwcheck ,
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.Nm kadm5_setup_passwd_quality_check ,
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.Nm kadm5_add_passwd_quality_verifier ,
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.Nm kadm5_check_password_quality
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.Nd Heimdal warning and error functions
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.Sh LIBRARY
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Kerberos 5 Library (libkadm5srv, -lkadm5srv)
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.Sh SYNOPSIS
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.In kadm5-protos.h
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.In kadm5-pwcheck.h
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.Ft void
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.Fo kadm5_setup_passwd_quality_check
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.Fa "krb5_context context"
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.Fa "const char *check_library"
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.Fa "const char *check_function"
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.Fc
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.Ft "krb5_error_code"
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.Fo kadm5_add_passwd_quality_verifier
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.Fa "krb5_context context"
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.Fa "const char *check_library"
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.Fc
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.Ft "const char *"
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.Fo kadm5_check_password_quality
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.Fa "krb5_context context"
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.Fa "krb5_principal principal"
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.Fa "krb5_data *pwd_data"
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.Fc
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.Ft int
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.Fo "(*kadm5_passwd_quality_check_func)"
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.Fa "krb5_context context"
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.Fa "krb5_principal principal"
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.Fa "krb5_data *password"
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.Fa "const char *tuning"
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.Fa "char *message"
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.Fa "size_t length"
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.Fc
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.Sh DESCRIPTION
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These functions perform the quality check for the heimdal database
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library.
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.Pp
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There are two versions of the shared object API; the old version (0)
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is deprecated, but still supported. The new version (1) supports
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multiple password quality checking policies in the same shared object.
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See below for details.
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.Pp
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The password quality checker will run all policies that are
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configured by the user. If any policy rejects the password, the password
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will be rejected.
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.Pp
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Policy names are of the form
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.Ql module-name:policy-name
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or, if the the policy name is unique enough, just
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.Ql policy-name .
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.Sh IMPLEMENTING A PASSWORD QUALITY CHECKING SHARED OBJECT
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(This refers to the version 1 API only.)
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.Pp
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Module shared objects may conveniently be compiled and linked with
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.Xr libtool 1 .
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An object needs to export a symbol called
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.Ql kadm5_password_verifier
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of the type
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.Ft "struct kadm5_pw_policy_verifier" .
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.Pp
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Its
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.Ft name
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and
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.Ft vendor
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fields should contain the obvious information.
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.Ft name
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must match the
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.Ql module-name
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portion of the policy name (the part before the colon), if the policy name
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contains a colon, or the policy will not be run.
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.Ft version
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should be
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.Dv KADM5_PASSWD_VERSION_V1 .
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.Pp
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.Ft funcs
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contains an array of
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.Ft "struct kadm5_pw_policy_check_func"
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structures that is terminated with an entry whose
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.Ft name
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component is
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.Dv NULL .
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The
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.Ft name
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field of the array must match the
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.Ql policy-name
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portion of a policy name (the part after the colon, or the complete policy
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name if there is no colon) specified by the user or the policy will not be
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run. The
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.Ft func
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fields of the array elements are functions that are exported by the
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module to be called to check the password. They get the following
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arguments: the Kerberos context, principal, password, a tuning parameter, and
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a pointer to a message buffer and its length. The tuning parameter
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for the quality check function is currently always
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.Dv NULL .
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If the password is acceptable, the function returns zero. Otherwise
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it returns non-zero and fills in the message buffer with an
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appropriate explanation.
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.Sh RUNNING THE CHECKS
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.Nm kadm5_setup_passwd_quality_check
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sets up type 0 checks. It sets up all type 0 checks defined in
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.Xr krb5.conf 5
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if called with the last two arguments null.
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.Pp
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.Nm kadm5_add_passwd_quality_verifier
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sets up type 1 checks. It sets up all type 1 tests defined in
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.Xr krb5.conf 5
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if called with a null second argument.
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.Nm kadm5_check_password_quality
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runs the checks in the order in which they are defined in
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.Xr krb5.conf 5
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and the order in which they occur in a
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module's
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.Ft funcs
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array until one returns non-zero.
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.Sh SEE ALSO
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.Xr libtool 1 ,
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.Xr krb5 3 ,
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.Xr krb5.conf 5
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