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.
242 lines
6.7 KiB
Groff
242 lines
6.7 KiB
Groff
.\" Copyright (c) 2001 - 2006 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 May 1, 2006
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.Dt KRB5_VERIFY_USER 3
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.Os HEIMDAL
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.Sh NAME
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.Nm krb5_verify_user ,
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.Nm krb5_verify_user_lrealm ,
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.Nm krb5_verify_user_opt ,
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.Nm krb5_verify_opt_init ,
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.Nm krb5_verify_opt_alloc ,
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.Nm krb5_verify_opt_free ,
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.Nm krb5_verify_opt_set_ccache ,
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.Nm krb5_verify_opt_set_flags ,
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.Nm krb5_verify_opt_set_service ,
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.Nm krb5_verify_opt_set_secure ,
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.Nm krb5_verify_opt_set_keytab
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.Nd Heimdal password verifying functions
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.Sh LIBRARY
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Kerberos 5 Library (libkrb5, -lkrb5)
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.Sh SYNOPSIS
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.In krb5.h
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.Ft krb5_error_code
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.Fn "krb5_verify_user" "krb5_context context" " krb5_principal principal" "krb5_ccache ccache" "const char *password" "krb5_boolean secure" "const char *service"
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.Ft krb5_error_code
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.Fn "krb5_verify_user_lrealm" "krb5_context context" "krb5_principal principal" "krb5_ccache ccache" "const char *password" "krb5_boolean secure" "const char *service"
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.Ft void
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.Fn krb5_verify_opt_init "krb5_verify_opt *opt"
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.Ft void
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.Fn krb5_verify_opt_alloc "krb5_verify_opt **opt"
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.Ft void
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.Fn krb5_verify_opt_free "krb5_verify_opt *opt"
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.Ft void
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.Fn krb5_verify_opt_set_ccache "krb5_verify_opt *opt" "krb5_ccache ccache"
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.Ft void
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.Fn krb5_verify_opt_set_keytab "krb5_verify_opt *opt" "krb5_keytab keytab"
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.Ft void
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.Fn krb5_verify_opt_set_secure "krb5_verify_opt *opt" "krb5_boolean secure"
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.Ft void
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.Fn krb5_verify_opt_set_service "krb5_verify_opt *opt" "const char *service"
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.Ft void
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.Fn krb5_verify_opt_set_flags "krb5_verify_opt *opt" "unsigned int flags"
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.Ft krb5_error_code
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.Fo krb5_verify_user_opt
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.Fa "krb5_context context"
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.Fa "krb5_principal principal"
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.Fa "const char *password"
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.Fa "krb5_verify_opt *opt"
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.Fc
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.Sh DESCRIPTION
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The
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.Nm krb5_verify_user
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function verifies the password supplied by a user.
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The principal whose password will be verified is specified in
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.Fa principal .
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New tickets will be obtained as a side-effect and stored in
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.Fa ccache
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(if
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.Dv NULL ,
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the default ccache is used).
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.Fn krb5_verify_user
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will call
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.Fn krb5_cc_initialize
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on the given
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.Fa ccache ,
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so
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.Fa ccache
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must only initialized with
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.Fn krb5_cc_resolve
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or
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.Fn krb5_cc_gen_new .
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If the password is not supplied in
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.Fa password
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(and is given as
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.Dv NULL )
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the user will be prompted for it.
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If
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.Fa secure
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the ticket will be verified against the locally stored service key
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.Fa service
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(by default
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.Ql host
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if given as
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.Dv NULL
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).
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.Pp
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The
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.Fn krb5_verify_user_lrealm
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function does the same, except that it ignores the realm in
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.Fa principal
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and tries all the local realms (see
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.Xr krb5.conf 5 ) .
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After a successful return, the principal is set to the authenticated
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realm. If the call fails, the principal will not be meaningful, and
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should only be freed with
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.Xr krb5_free_principal 3 .
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.Pp
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.Fn krb5_verify_opt_alloc
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and
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.Fn krb5_verify_opt_free
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allocates and frees a
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.Li krb5_verify_opt .
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You should use the the alloc and free function instead of allocation
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the structure yourself, this is because in a future release the
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structure wont be exported.
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.Pp
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.Fn krb5_verify_opt_init
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resets all opt to default values.
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.Pp
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None of the krb5_verify_opt_set function makes a copy of the data
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structure that they are called with. It's up the caller to free them
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after the
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.Fn krb5_verify_user_opt
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is called.
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.Pp
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.Fn krb5_verify_opt_set_ccache
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sets the
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.Fa ccache
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that user of
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.Fa opt
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will use. If not set, the default credential cache will be used.
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.Pp
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.Fn krb5_verify_opt_set_keytab
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sets the
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.Fa keytab
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that user of
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.Fa opt
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will use. If not set, the default keytab will be used.
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.Pp
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.Fn krb5_verify_opt_set_secure
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if
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.Fa secure
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if true, the password verification will require that the ticket will
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be verified against the locally stored service key. If not set,
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default value is true.
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.Pp
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.Fn krb5_verify_opt_set_service
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sets the
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.Fa service
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principal that user of
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.Fa opt
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will use. If not set, the
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.Ql host
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service will be used.
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.Pp
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.Fn krb5_verify_opt_set_flags
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sets
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.Fa flags
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that user of
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.Fa opt
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will use.
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If the flag
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.Dv KRB5_VERIFY_LREALMS
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is used, the
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.Fa principal
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will be modified like
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.Fn krb5_verify_user_lrealm
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modifies it.
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.Pp
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.Fn krb5_verify_user_opt
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function verifies the
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.Fa password
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supplied by a user.
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The principal whose password will be verified is specified in
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.Fa principal .
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Options the to the verification process is pass in in
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.Fa opt .
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.Sh EXAMPLES
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Here is a example program that verifies a password. it uses the
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.Ql host/`hostname`
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service principal in
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.Pa krb5.keytab .
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.Bd -literal
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#include <krb5.h>
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int
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main(int argc, char **argv)
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{
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char *user;
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krb5_error_code error;
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krb5_principal princ;
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krb5_context context;
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if (argc != 2)
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errx(1, "usage: verify_passwd <principal-name>");
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user = argv[1];
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if (krb5_init_context(&context) < 0)
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errx(1, "krb5_init_context");
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if ((error = krb5_parse_name(context, user, &princ)) != 0)
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krb5_err(context, 1, error, "krb5_parse_name");
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error = krb5_verify_user(context, princ, NULL, NULL, TRUE, NULL);
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if (error)
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krb5_err(context, 1, error, "krb5_verify_user");
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return 0;
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}
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.Ed
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.Sh SEE ALSO
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.Xr krb5_cc_gen_new 3 ,
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.Xr krb5_cc_initialize 3 ,
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.Xr krb5_cc_resolve 3 ,
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.Xr krb5_err 3 ,
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.Xr krb5_free_principal 3 ,
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.Xr krb5_init_context 3 ,
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.Xr krb5_kt_default 3 ,
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.Xr krb5.conf 5
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