crypto/heimdal-0.6.3/lib/hdb/common.c

   1 /*
   2  * Copyright (c) 1997-2002 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. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "hdb_locl.h"
  35
  36 RCSID("$Id: common.c,v 1.12 2003/01/14 06:54:32 lha Exp $");
  37
  38 int
  39 hdb_principal2key(krb5_context context, krb5_principal p, krb5_data *key)
  40 {
  41     Principal new;
  42     size_t len;
  43     int ret;
  44
  45     ret = copy_Principal(p, &new);
  46     if(ret)
  47         return ret;
  48     new.name.name_type = 0;
  49
  50     ASN1_MALLOC_ENCODE(Principal, key->data, key->length, &new, &len, ret);
  51     free_Principal(&new);
  52     return ret;
  53 }
  54
  55 int
  56 hdb_key2principal(krb5_context context, krb5_data *key, krb5_principal p)
  57 {
  58     return decode_Principal(key->data, key->length, p, NULL);
  59 }
  60
  61 int
  62 hdb_entry2value(krb5_context context, hdb_entry *ent, krb5_data *value)
  63 {
  64     size_t len;
  65     int ret;
  66
  67     ASN1_MALLOC_ENCODE(hdb_entry, value->data, value->length, ent, &len, ret);
  68     return ret;
  69 }
  70
  71 int
  72 hdb_value2entry(krb5_context context, krb5_data *value, hdb_entry *ent)
  73 {
  74     return decode_hdb_entry(value->data, value->length, ent, NULL);
  75 }
  76
  77 krb5_error_code
  78 _hdb_fetch(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry)
  79 {
  80     krb5_data key, value;
  81     int code;
  82
  83     hdb_principal2key(context, entry->principal, &key);
  84     code = db->_get(context, db, key, &value);
  85     krb5_data_free(&key);
  86     if(code)
  87         return code;
  88     code = hdb_value2entry(context, &value, entry);
  89     krb5_data_free(&value);
  90     if (code)
  91         return code;
  92     if (db->master_key_set && (flags & HDB_F_DECRYPT)) {
  93         code = hdb_unseal_keys (context, db, entry);
  94         if (code)
  95             hdb_free_entry(context, entry);
  96     }
  97     return code;
  98 }
  99
 100 krb5_error_code
 101 _hdb_store(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry)
 102 {
 103     krb5_data key, value;
 104     int code;
 105
 106     if(entry->generation == NULL) {
 107         struct timeval t;
 108         entry->generation = malloc(sizeof(*entry->generation));
 109         if(entry->generation == NULL) {
 110             krb5_set_error_string(context, "malloc: out of memory");
 111             return ENOMEM;
 112         }
 113         gettimeofday(&t, NULL);
 114         entry->generation->time = t.tv_sec;
 115         entry->generation->usec = t.tv_usec;
 116         entry->generation->gen = 0;
 117     } else
 118         entry->generation->gen++;
 119     hdb_principal2key(context, entry->principal, &key);
 120     code = hdb_seal_keys(context, db, entry);
 121     if (code) {
 122         krb5_data_free(&key);
 123         return code;
 124     }
 125     hdb_entry2value(context, entry, &value);
 126     code = db->_put(context, db, flags & HDB_F_REPLACE, key, value);
 127     krb5_data_free(&value);
 128     krb5_data_free(&key);
 129     return code;
 130 }
 131
 132 krb5_error_code
 133 _hdb_remove(krb5_context context, HDB *db, hdb_entry *entry)
 134 {
 135     krb5_data key;
 136     int code;
 137
 138     hdb_principal2key(context, entry->principal, &key);
 139     code = db->_del(context, db, key);
 140     krb5_data_free(&key);
 141     return code;
 142 }
 143