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/*
* Copyright (c) 2005, PADL Software Pty Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of PADL Software nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "kcm_locl.h"
/*
* Get a new ticket using a keytab/cached key and swap it into
* an existing redentials cache
*/
krb5_error_code
kcm_ccache_acquire(krb5_context context,
kcm_ccache ccache,
krb5_creds **credp)
{
krb5_error_code ret = 0;
krb5_creds cred;
krb5_const_realm realm;
krb5_get_init_creds_opt *opt = NULL;
krb5_ccache_data ccdata;
char *in_tkt_service = NULL;
const char *estr;
*credp = NULL;
memset(&cred, 0, sizeof(cred));
KCM_ASSERT_VALID(ccache);
/* We need a cached key or keytab to acquire credentials */
if (ccache->flags & KCM_FLAGS_USE_CACHED_KEY) {
if (ccache->key.keyblock.keyvalue.length == 0)
krb5_abortx(context,
"kcm_ccache_acquire: KCM_FLAGS_USE_CACHED_KEY without key");
} else if (ccache->flags & KCM_FLAGS_USE_KEYTAB) {
if (ccache->key.keytab == NULL)
krb5_abortx(context,
"kcm_ccache_acquire: KCM_FLAGS_USE_KEYTAB without keytab");
} else {
kcm_log(0, "Cannot acquire initial credentials for cache %s without key",
ccache->name);
return KRB5_FCC_INTERNAL;
}
HEIMDAL_MUTEX_lock(&ccache->mutex);
/* Fake up an internal ccache */
kcm_internal_ccache(context, ccache, &ccdata);
/* Now, actually acquire the creds */
if (ccache->server != NULL) {
ret = krb5_unparse_name(context, ccache->server, &in_tkt_service);
if (ret) {
estr = krb5_get_error_message(context, ret);
kcm_log(0, "Failed to unparse service principal name for cache %s: %s",
ccache->name, estr);
krb5_free_error_message(context, estr);
goto out;
}
}
realm = krb5_principal_get_realm(context, ccache->client);
ret = krb5_get_init_creds_opt_alloc(context, &opt);
if (ret)
goto out;
krb5_get_init_creds_opt_set_default_flags(context, "kcm", realm, opt);
if (ccache->tkt_life != 0)
krb5_get_init_creds_opt_set_tkt_life(opt, ccache->tkt_life);
if (ccache->renew_life != 0)
krb5_get_init_creds_opt_set_renew_life(opt, ccache->renew_life);
if (ccache->flags & KCM_FLAGS_USE_CACHED_KEY) {
ret = krb5_get_init_creds_keyblock(context,
&cred,
ccache->client,
&ccache->key.keyblock,
0,
in_tkt_service,
opt);
} else {
/* loosely based on lib/krb5/init_creds_pw.c */
ret = krb5_get_init_creds_keytab(context,
&cred,
ccache->client,
ccache->key.keytab,
0,
in_tkt_service,
opt);
}
if (ret) {
estr = krb5_get_error_message(context, ret);
kcm_log(0, "Failed to acquire credentials for cache %s: %s",
ccache->name, estr);
krb5_free_error_message(context, estr);
goto out;
}
/* Swap them in */
kcm_ccache_remove_creds_internal(context, ccache);
ret = kcm_ccache_store_cred_internal(context, ccache, &cred, 0, credp);
if (ret) {
estr = krb5_get_error_message(context, ret);
kcm_log(0, "Failed to store credentials for cache %s: %s",
ccache->name, estr);
krb5_free_error_message(context, estr);
krb5_free_cred_contents(context, &cred);
goto out;
}
out:
free(in_tkt_service);
if (opt)
krb5_get_init_creds_opt_free(context, opt);
HEIMDAL_MUTEX_unlock(&ccache->mutex);
return ret;
}
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