HDB keytab backend
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6871 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
185
lib/hdb/keytab.c
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185
lib/hdb/keytab.c
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/*
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* Copyright (c) 1999 Kungliga Tekniska H<>gskolan
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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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#include "hdb_locl.h"
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/* keytab backend for HDB databases */
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RCSID("$Id$");
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struct hdb_data {
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char *dbname;
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char *mkey;
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HDB *db;
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};
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static krb5_error_code
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hdb_resolve(krb5_context context, const char *name, krb5_keytab id)
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{
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krb5_error_code ret;
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struct hdb_data *d;
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const char *db, *mkey;
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d = malloc(sizeof(*d));
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if(d == NULL)
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return ENOMEM;
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db = name;
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mkey = strchr(name, ':');
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if(mkey == NULL || mkey[1] == '\0') {
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if(*name == '\0')
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d->dbname = NULL;
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else {
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d->dbname = strdup(name);
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if(d->dbname == NULL) {
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free(d);
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return ENOMEM;
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}
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}
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d->mkey = NULL;
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} else {
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if((mkey - db) == 0) {
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d->dbname = NULL;
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} else {
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d->dbname = malloc(mkey - db);
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if(d->dbname == NULL) {
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free(d);
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return ENOMEM;
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}
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strncpy(d->dbname, db, mkey - db);
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d->dbname[mkey - db] = '\0';
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}
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d->mkey = strdup(mkey + 1);
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if(d->mkey == NULL) {
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free(d->dbname);
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free(d);
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return ENOMEM;
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}
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}
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ret = hdb_create(context, &d->db, d->dbname);
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if(ret) {
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free(d->dbname);
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free(d->mkey);
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free(d);
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return ret;
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}
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ret = hdb_set_master_keyfile (context, d->db, d->mkey);
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if(ret) {
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(*d->db->destroy)(context, d->db);
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free(d->dbname);
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free(d->mkey);
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free(d);
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return ret;
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}
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id->data = d;
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return 0;
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}
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static krb5_error_code
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hdb_close(krb5_context context, krb5_keytab id)
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{
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struct hdb_data *d = id->data;
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(*d->db->destroy)(context, d->db);
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free(d);
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return 0;
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}
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static krb5_error_code
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hdb_get_name(krb5_context context,
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krb5_keytab id,
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char *name,
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size_t namesize)
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{
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struct hdb_data *d = id->data;
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snprintf(name, namesize, "%s%s%s",
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d->dbname ? d->dbname : "",
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(d->dbname || d->mkey) ? ":" : "",
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d->mkey ? d->mkey : "");
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return 0;
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}
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static krb5_error_code
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hdb_get_entry(krb5_context context,
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krb5_keytab id,
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krb5_const_principal principal,
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krb5_kvno kvno,
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krb5_enctype enctype,
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krb5_keytab_entry *entry)
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{
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hdb_entry ent;
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krb5_error_code ret;
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struct hdb_data *d = id->data;
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int i;
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ret = (*d->db->open)(context, d->db, O_RDONLY, 0);
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if (ret)
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return ret;
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ent.principal = (krb5_principal)principal;
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ret = (*d->db->fetch)(context, d->db, HDB_F_DECRYPT, &ent);
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(*d->db->close)(context, d->db);
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if(ret)
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return ret;
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if(kvno && ent.kvno != kvno) {
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hdb_free_entry(context, &ent);
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return KRB5_KT_NOTFOUND;
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}
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if(enctype == 0)
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if(ent.keys.len > 0)
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enctype = ent.keys.val[0].key.keytype;
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ret = KRB5_KT_NOTFOUND;
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for(i = 0; i < ent.keys.len; i++) {
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if(ent.keys.val[i].key.keytype == enctype) {
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krb5_copy_principal(context, principal, &entry->principal);
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entry->vno = ent.kvno;
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krb5_copy_keyblock_contents(context,
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&ent.keys.val[i].key,
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&entry->keyblock);
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ret = 0;
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break;
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}
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}
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hdb_free_entry(context, &ent);
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return ret;
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}
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krb5_kt_ops hdb_kt_ops = {
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"HDB",
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hdb_resolve,
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hdb_get_name,
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hdb_close,
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hdb_get_entry,
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NULL, /* start_seq_get */
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NULL, /* next_entry */
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NULL, /* end_seq_get */
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NULL, /* add */
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NULL /* remove */
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};
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