lib/hdb/common.c

   1 /*
   2  * Copyright (c) 1997 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "hdb_locl.h"
  40
  41 RCSID("$Id$");
  42
  43 int
  44 hdb_principal2key(krb5_context context, krb5_principal p, krb5_data *key)
  45 {
  46     Principal new;
  47     size_t len;
  48     unsigned char *buf;
  49     int ret;
  50
  51     ret = copy_Principal(p, &new);
  52     if(ret)
  53         goto out;
  54     new.name.name_type = 0;
  55     len = length_Principal(&new);
  56     buf  = malloc(len);
  57     if(buf == NULL){
  58         ret = ENOMEM;
  59         goto out;
  60     }
  61     ret = encode_Principal(buf + len - 1, len, &new, &len);
  62     if(ret){
  63         free(buf);
  64         goto out;
  65     }
  66     key->data = buf;
  67     key->length = len;
  68 out:
  69     free_Principal(&new);
  70     return ret;
  71 }
  72
  73 int
  74 hdb_key2principal(krb5_context context, krb5_data *key, krb5_principal p)
  75 {
  76     size_t len;
  77     return decode_Principal(key->data, key->length, p, &len);
  78 }
  79
  80 int
  81 hdb_entry2value(krb5_context context, hdb_entry *ent, krb5_data *value)
  82 {
  83     unsigned char *buf;
  84     size_t len;
  85     int ret;
  86     len = length_hdb_entry(ent);
  87     buf = malloc(len);
  88     if(buf == NULL)
  89         return ENOMEM;
  90     ret = encode_hdb_entry(buf + len - 1, len, ent, &len);
  91     if(ret){
  92         free(buf);
  93         return ret;
  94     }
  95     value->data = buf;
  96     value->length = len;
  97     return 0;
  98 }
  99
 100 int
 101 hdb_value2entry(krb5_context context, krb5_data *value, hdb_entry *ent)
 102 {
 103     size_t len;
 104     return decode_hdb_entry(value->data, value->length, ent, &len);
 105 }
 106
 107 krb5_error_code
 108 _hdb_fetch(krb5_context context, HDB *db, hdb_entry *entry)
 109 {
 110     krb5_data key, value;
 111     int code;
 112
 113     hdb_principal2key(context, entry->principal, &key);
 114     code = db->_get(context, db, key, &value);
 115     krb5_data_free(&key);
 116     if(code)
 117         return code;
 118     hdb_value2entry(context, &value, entry);
 119     krb5_data_free(&value);
 120     return 0;
 121 }
 122
 123 krb5_error_code
 124 _hdb_store(krb5_context context, HDB *db, int replace, hdb_entry *entry)
 125 {
 126     krb5_data key, value;
 127     int code;
 128
 129     hdb_principal2key(context, entry->principal, &key);
 130     hdb_entry2value(context, entry, &value);
 131     code = db->_put(context, db, replace, key, value);
 132     krb5_data_free(&value);
 133     krb5_data_free(&key);
 134     return code;
 135 }
 136
 137 krb5_error_code
 138 _hdb_delete(krb5_context context, HDB *db, hdb_entry *entry)
 139 {
 140     krb5_data key;
 141     int code;
 142
 143     hdb_principal2key(context, entry->principal, &key);
 144     code = db->_del(context, db, key);
 145     krb5_data_free(&key);
 146     return code;
 147 }
 148