diff options
Diffstat (limited to 'third_party/heimdal/kcm/acquire.c')
| -rw-r--r-- | third_party/heimdal/kcm/acquire.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/third_party/heimdal/kcm/acquire.c b/third_party/heimdal/kcm/acquire.c new file mode 100644 index 0000000..a5450c0 --- /dev/null +++ b/third_party/heimdal/kcm/acquire.c @@ -0,0 +1,149 @@ +/* + * 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; +} |