1 /* 2 * Copyright (c) 1997-2002 Kungliga Tekniska H�gskolan 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 } 143 144