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.
182 lines
5.0 KiB
Groff
182 lines
5.0 KiB
Groff
.\" Copyright (c) 2004 - 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 July 26, 2004
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.Dt KRB5_GET_CREDENTIALS 3
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.Os HEIMDAL
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.Sh NAME
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.Nm krb5_get_credentials ,
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.Nm krb5_get_credentials_with_flags ,
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.Nm krb5_get_kdc_cred ,
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.Nm krb5_get_renewed_creds
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.Nd get credentials from the KDC using krbtgt
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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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.Fo krb5_get_credentials
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.Fa "krb5_context context"
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.Fa "krb5_flags options"
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.Fa "krb5_ccache ccache"
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.Fa "krb5_creds *in_creds"
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.Fa "krb5_creds **out_creds"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_get_credentials_with_flags
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.Fa "krb5_context context"
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.Fa "krb5_flags options"
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.Fa "krb5_kdc_flags flags"
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.Fa "krb5_ccache ccache"
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.Fa "krb5_creds *in_creds"
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.Fa "krb5_creds **out_creds"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_get_kdc_cred
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.Fa "krb5_context context"
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.Fa "krb5_ccache id"
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.Fa "krb5_kdc_flags flags"
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.Fa "krb5_addresses *addresses"
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.Fa "Ticket *second_ticket"
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.Fa "krb5_creds *in_creds"
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.Fa "krb5_creds **out_creds"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_get_renewed_creds
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.Fa "krb5_context context"
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.Fa "krb5_creds *creds"
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.Fa "krb5_const_principal client"
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.Fa "krb5_ccache ccache"
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.Fa "const char *in_tkt_service"
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.Fc
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.Sh DESCRIPTION
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.Fn krb5_get_credentials_with_flags
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get credentials specified by
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.Fa in_creds->server
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and
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.Fa in_creds->client
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(the rest of the
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.Fa in_creds
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structure is ignored)
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by first looking in the
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.Fa ccache
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and if doesn't exists or is expired, fetch the credential from the KDC
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using the krbtgt in
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.Fa ccache .
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The credential is returned in
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.Fa out_creds
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and should be freed using the function
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.Fn krb5_free_creds .
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.Pp
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Valid flags to pass into
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.Fa options
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argument are:
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.Pp
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.Bl -tag -width "KRB5_GC_EXPIRED_OK" -compact
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.It KRB5_GC_CACHED
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Only check the
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.Fa ccache ,
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don't got out on network to fetch credential.
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.It KRB5_GC_USER_USER
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Request a user to user ticket.
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This option doesn't store the resulting user to user credential in
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the
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.Fa ccache .
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.It KRB5_GC_EXPIRED_OK
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returns the credential even if it is expired, default behavior is trying
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to refetch the credential from the KDC.
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.El
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.Pp
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.Fa Flags
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are KDCOptions, note the caller must fill in the bit-field and not
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use the integer associated structure.
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.Pp
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.Fn krb5_get_credentials
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works the same way as
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.Fn krb5_get_credentials_with_flags
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except that the
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.Fa flags
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field is missing.
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.Pp
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.Fn krb5_get_kdc_cred
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does the same as the functions above, but the caller must fill in all
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the information andits closer to the wire protocol.
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.Pp
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.Fn krb5_get_renewed_creds
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renews a credential given by
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.Fa in_tkt_service
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(if
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.Dv NULL
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the default
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.Li krbtgt )
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using the credential cache
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.Fa ccache .
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The result is stored in
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.Fa creds
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and should be freed using
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.Fa krb5_free_creds .
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.Sh EXAMPLES
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Here is a example function that get a credential from a credential cache
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.Fa id
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or the KDC and returns it to the caller.
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.Bd -literal
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#include <krb5.h>
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int
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getcred(krb5_context context, krb5_ccache id, krb5_creds **creds)
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{
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krb5_error_code ret;
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krb5_creds in;
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ret = krb5_parse_name(context, "client@EXAMPLE.COM",
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&in.client);
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if (ret)
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krb5_err(context, 1, ret, "krb5_parse_name");
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ret = krb5_parse_name(context, "host/server.example.com@EXAMPLE.COM",
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&in.server);
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if (ret)
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krb5_err(context, 1, ret, "krb5_parse_name");
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ret = krb5_get_credentials(context, 0, id, &in, creds);
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if (ret)
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krb5_err(context, 1, ret, "krb5_get_credentials");
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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 3 ,
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.Xr krb5_get_forwarded_creds 3 ,
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.Xr krb5.conf 5
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