1 /* 2 * Copyright (c) 2005 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 struct hdb_dbinfo { 37 char *label; 38 char *realm; 39 char *dbname; 40 char *mkey_file; 41 char *acl_file; 42 char *log_file; 43 const krb5_config_binding *binding; 44 struct hdb_dbinfo *next; 45 }; 46 47 static int 48 get_dbinfo(krb5_context context, 49 const krb5_config_binding *db_binding, 50 const char *label, 51 struct hdb_dbinfo **db) 52 { 53 struct hdb_dbinfo *di; 54 const char *p; 55 56 *db = NULL; 57 58 p = krb5_config_get_string(context, db_binding, "dbname", NULL); 59 if(p == NULL) 60 return 0; 61 62 di = calloc(1, sizeof(*di)); 63 if (di == NULL) { 64 krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); 65 return ENOMEM; 66 } 67 di->label = strdup(label); 68 di->dbname = strdup(p); 69 70 p = krb5_config_get_string(context, db_binding, "realm", NULL); 71 if(p) 72 di->realm = strdup(p); 73 p = krb5_config_get_string(context, db_binding, "mkey_file", NULL); 74 if(p) 75 di->mkey_file = strdup(p); 76 p = krb5_config_get_string(context, db_binding, "acl_file", NULL); 77 if(p) 78 di->acl_file = strdup(p); 79 p = krb5_config_get_string(context, db_binding, "log_file", NULL); 80 if(p) 81 di->log_file = strdup(p); 82 83 di->binding = db_binding; 84 85 *db = di; 86 return 0; 87 } 88 89 90 int 91 hdb_get_dbinfo(krb5_context context, struct hdb_dbinfo **dbp) 92 { 93 const krb5_config_binding *db_binding; 94 struct hdb_dbinfo *di, **dt, *databases; 95 const char *default_dbname = HDB_DEFAULT_DB; 96 const char *default_mkey = HDB_DB_DIR "/m-key"; 97 const char *default_acl = HDB_DB_DIR "/kadmind.acl"; 98 const char *p; 99 int ret; 100 101 *dbp = NULL; 102 dt = NULL; 103 databases = NULL; 104 105 db_binding = krb5_config_get_list(context, NULL, 106 "kdc", 107 "database", 108 NULL); 109 if (db_binding) { 110 111 ret = get_dbinfo(context, db_binding, "default", &di); 112 if (ret == 0 && di) { 113 databases = di; 114 dt = &di->next; 115 } 116 117 for ( ; db_binding != NULL; db_binding = db_binding->next) { 118 119 if (db_binding->type != krb5_config_list) 120 continue; 121 122 ret = get_dbinfo(context, db_binding->u.list, 123 db_binding->name, &di); 124 if (ret) 125 krb5_err(context, 1, ret, "failed getting realm"); 126 127 if (di == NULL) 128 continue; 129 130 if (dt) 131 *dt = di; 132 else 133 databases = di; 134 dt = &di->next; 135 136 } 137 } 138 139 if(databases == NULL) { 140 /* if there are none specified, create one and use defaults */ 141 di = calloc(1, sizeof(*di)); 142 databases = di; 143 di->label = strdup("default"); 144 } 145 146 for(di = databases; di; di = di->next) { 147 if(di->dbname == NULL) { 148 di->dbname = strdup(default_dbname); 149 if (di->mkey_file == NULL) 150 di->mkey_file = strdup(default_mkey); 151 } 152 if(di->mkey_file == NULL) { 153 p = strrchr(di->dbname, '.'); 154 if(p == NULL || strchr(p, '/') != NULL) 155 /* final pathname component does not contain a . */ 156 asprintf(&di->mkey_file, "%s.mkey", di->dbname); 157 else 158 /* the filename is something.else, replace .else with 159 .mkey */ 160 asprintf(&di->mkey_file, "%.*s.mkey", 161 (int)(p - di->dbname), di->dbname); 162 } 163 if(di->acl_file == NULL) 164 di->acl_file = strdup(default_acl); 165 } 166 *dbp = databases; 167 return 0; 168 } 169 170 171 struct hdb_dbinfo * 172 hdb_dbinfo_get_next(struct hdb_dbinfo *dbp, struct hdb_dbinfo *dbprevp) 173 { 174 if (dbprevp == NULL) 175 return dbp; 176 else 177 return dbprevp->next; 178 } 179 180 const char * 181 hdb_dbinfo_get_label(krb5_context context, struct hdb_dbinfo *dbp) 182 { 183 return dbp->label; 184 } 185 186 const char * 187 hdb_dbinfo_get_realm(krb5_context context, struct hdb_dbinfo *dbp) 188 { 189 return dbp->realm; 190 } 191 192 const char * 193 hdb_dbinfo_get_dbname(krb5_context context, struct hdb_dbinfo *dbp) 194 { 195 return dbp->dbname; 196 } 197 198 const char * 199 hdb_dbinfo_get_mkey_file(krb5_context context, struct hdb_dbinfo *dbp) 200 { 201 return dbp->mkey_file; 202 } 203 204 const char * 205 hdb_dbinfo_get_acl_file(krb5_context context, struct hdb_dbinfo *dbp) 206 { 207 return dbp->acl_file; 208 } 209 210 const char * 211 hdb_dbinfo_get_log_file(krb5_context context, struct hdb_dbinfo *dbp) 212 { 213 return dbp->log_file; 214 } 215 216 const krb5_config_binding * 217 hdb_dbinfo_get_binding(krb5_context context, struct hdb_dbinfo *dbp) 218 { 219 return dbp->binding; 220 } 221 222 void 223 hdb_free_dbinfo(krb5_context context, struct hdb_dbinfo **dbp) 224 { 225 struct hdb_dbinfo *di, *ndi; 226 227 for(di = *dbp; di != NULL; di = ndi) { 228 ndi = di->next; 229 free (di->label); 230 free (di->realm); 231 free (di->dbname); 232 free (di->mkey_file); 233 free (di->acl_file); 234 free (di->log_file); 235 free(di); 236 } 237 *dbp = NULL; 238 } 239 240 /** 241 * Return the directory where the hdb database resides. 242 * 243 * @param context Kerberos 5 context. 244 * 245 * @return string pointing to directory. 246 */ 247 248 const char * 249 hdb_db_dir(krb5_context context) 250 { 251 return HDB_DB_DIR; 252 } 253 254 /** 255 * Return the default hdb database resides. 256 * 257 * @param context Kerberos 5 context. 258 * 259 * @return string pointing to directory. 260 */ 261 262 const char * 263 hdb_default_db(krb5_context context) 264 { 265 return HDB_DEFAULT_DB; 266 } 267