146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/*
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* Copyright (c) 2005, PADL Software Pty Ltd.
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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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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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#include "kcm_locl.h"
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/*
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* Get a new ticket using a keytab/cached key and swap it into
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* an existing redentials cache
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*/
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krb5_error_code
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kcm_ccache_acquire(krb5_context context,
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kcm_ccache ccache,
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krb5_creds **credp)
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{
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krb5_error_code ret = 0;
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krb5_creds cred;
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krb5_const_realm realm;
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krb5_get_init_creds_opt *opt = NULL;
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krb5_ccache_data ccdata;
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char *in_tkt_service = NULL;
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memset(&cred, 0, sizeof(cred));
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KCM_ASSERT_VALID(ccache);
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/* We need a cached key or keytab to acquire credentials */
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if (ccache->flags & KCM_FLAGS_USE_CACHED_KEY) {
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if (ccache->key.keyblock.keyvalue.length == 0)
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krb5_abortx(context,
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"kcm_ccache_acquire: KCM_FLAGS_USE_CACHED_KEY without key");
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} else if (ccache->flags & KCM_FLAGS_USE_KEYTAB) {
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if (ccache->key.keytab == NULL)
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krb5_abortx(context,
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"kcm_ccache_acquire: KCM_FLAGS_USE_KEYTAB without keytab");
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} else {
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kcm_log(0, "Cannot acquire initial credentials for cache %s without key",
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ccache->name);
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return KRB5_FCC_INTERNAL;
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}
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HEIMDAL_MUTEX_lock(&ccache->mutex);
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/* Fake up an internal ccache */
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kcm_internal_ccache(context, ccache, &ccdata);
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/* Now, actually acquire the creds */
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if (ccache->server != NULL) {
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ret = krb5_unparse_name(context, ccache->server, &in_tkt_service);
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if (ret) {
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kcm_log(0, "Failed to unparse service principal name for cache %s: %s",
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ccache->name, krb5_get_err_text(context, ret));
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return ret;
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}
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}
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realm = krb5_principal_get_realm(context, ccache->client);
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ret = krb5_get_init_creds_opt_alloc(context, &opt);
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if (ret)
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goto out;
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krb5_get_init_creds_opt_set_default_flags(context, "kcm", realm, opt);
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if (ccache->tkt_life != 0)
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krb5_get_init_creds_opt_set_tkt_life(opt, ccache->tkt_life);
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if (ccache->renew_life != 0)
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krb5_get_init_creds_opt_set_renew_life(opt, ccache->renew_life);
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if (ccache->flags & KCM_FLAGS_USE_CACHED_KEY) {
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ret = krb5_get_init_creds_keyblock(context,
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&cred,
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ccache->client,
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&ccache->key.keyblock,
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0,
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in_tkt_service,
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opt);
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} else {
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/* loosely based on lib/krb5/init_creds_pw.c */
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ret = krb5_get_init_creds_keytab(context,
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&cred,
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ccache->client,
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ccache->key.keytab,
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0,
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in_tkt_service,
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opt);
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}
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if (ret) {
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kcm_log(0, "Failed to acquire credentials for cache %s: %s",
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ccache->name, krb5_get_err_text(context, ret));
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if (in_tkt_service != NULL)
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free(in_tkt_service);
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goto out;
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}
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if (in_tkt_service != NULL)
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free(in_tkt_service);
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/* Swap them in */
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kcm_ccache_remove_creds_internal(context, ccache);
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ret = kcm_ccache_store_cred_internal(context, ccache, &cred, 0, credp);
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if (ret) {
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kcm_log(0, "Failed to store credentials for cache %s: %s",
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ccache->name, krb5_get_err_text(context, ret));
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krb5_free_cred_contents(context, &cred);
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goto out;
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}
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out:
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if (opt)
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krb5_get_init_creds_opt_free(context, opt);
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HEIMDAL_MUTEX_unlock(&ccache->mutex);
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return ret;
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}
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