lib/kadm5/context_s.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 "kadm5_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 static kadm5_ret_t
  39 kadm5_s_lock(void *server_handle)
  40 {
  41     kadm5_server_context *context = server_handle;
  42     kadm5_ret_t ret;
  43
  44     if (context->keep_open) {
  45         /*
  46          * We open/close around every operation, but we retain the DB
  47          * open if the DB was locked with a prior call to kadm5_lock(),
  48          * so if it's open here that must be because the DB is locked.
  49          */
  50         heim_assert(context->db->lock_count > 0,
  51                     "Internal error in tracking HDB locks");
  52         return KADM5_ALREADY_LOCKED;
  53     }
  54
  55     ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
  56     if (ret)
  57         return ret;
  58
  59     ret = context->db->hdb_lock(context->context, context->db, HDB_WLOCK);
  60     if (ret) {
  61         (void) context->db->hdb_close(context->context, context->db);
  62         return ret;
  63     }
  64
  65     /*
  66      * Attempt to recover the log.  This will generally fail on slaves,
  67      * and we can't tell if we're on a slave here.
  68      *
  69      * Perhaps we could set a flag in the kadm5_server_context to
  70      * indicate whether a read has been done without recovering the log,
  71      * in which case we could fail any subsequent writes.
  72      */
  73     if (kadm5_log_init(context) == 0)
  74         (void) kadm5_log_end(context);
  75
  76     context->keep_open = 1;
  77     return 0;
  78 }
  79
  80 static kadm5_ret_t
  81 kadm5_s_unlock(void *server_handle)
  82 {
  83     kadm5_server_context *context = server_handle;
  84     kadm5_ret_t ret;
  85
  86     if (!context->keep_open)
  87         return KADM5_NOT_LOCKED;
  88
  89     context->keep_open = 0;
  90     ret = context->db->hdb_unlock(context->context, context->db);
  91     (void) context->db->hdb_close(context->context, context->db);
  92     return ret;
  93 }
  94
  95 static void
  96 set_funcs(kadm5_server_context *c)
  97 {
  98 #define SET(C, F) (C)->funcs.F = kadm5_s_ ## F
  99     SET(c, chpass_principal);
 100     SET(c, chpass_principal_with_key);
 101     SET(c, create_principal);
 102     SET(c, delete_principal);
 103     SET(c, destroy);
 104     SET(c, flush);
 105     SET(c, get_principal);
 106     SET(c, get_principals);
 107     SET(c, get_privs);
 108     SET(c, modify_principal);
 109     SET(c, prune_principal);
 110     SET(c, randkey_principal);
 111     SET(c, rename_principal);
 112     SET(c, lock);
 113     SET(c, unlock);
 114     SET(c, setkey_principal_3);
 115     SET(c, iter_principals);
 116     SET(c, dup_context);
 117 }
 118
 119 #ifndef NO_UNIX_SOCKETS
 120
 121 static void
 122 set_socket_name(krb5_context context, struct sockaddr_un *un)
 123 {
 124     const char *fn = kadm5_log_signal_socket(context);
 125
 126     memset(un, 0, sizeof(*un));
 127     un->sun_family = AF_UNIX;
 128     strlcpy (un->sun_path, fn, sizeof(un->sun_path));
 129
 130 }
 131 #else
 132
 133 static void
 134 set_socket_info(krb5_context context, struct addrinfo **info)
 135 {
 136     kadm5_log_signal_socket_info(context, 0, info);
 137 }
 138
 139 #endif
 140
 141 static kadm5_ret_t
 142 find_db_spec(kadm5_server_context *ctx)
 143 {
 144     krb5_context context = ctx->context;
 145     struct hdb_dbinfo *info, *d;
 146     krb5_error_code ret;
 147     int aret;
 148
 149     if (ctx->config.realm) {
 150         /* fetch the databases */
 151         ret = hdb_get_dbinfo(context, &info);
 152         if (ret)
 153             return ret;
 154
 155         d = NULL;
 156         while ((d = hdb_dbinfo_get_next(info, d)) != NULL) {
 157             const char *p = hdb_dbinfo_get_realm(context, d);
 158
 159             /* match default (realm-less) */
 160             if(p != NULL && strcmp(ctx->config.realm, p) != 0)
 161                 continue;
 162
 163             p = hdb_dbinfo_get_dbname(context, d);
 164             if (p) {
 165                 ctx->config.dbname = strdup(p);
 166                 if (ctx->config.dbname == NULL) {
 167                     hdb_free_dbinfo(context, &info);
 168                     return krb5_enomem(context);
 169                 }
 170             }
 171
 172             p = hdb_dbinfo_get_acl_file(context, d);
 173             if (p) {
 174                 ctx->config.acl_file = strdup(p);
 175                 if (ctx->config.acl_file == NULL) {
 176                     hdb_free_dbinfo(context, &info);
 177                     return krb5_enomem(context);
 178                 }
 179             }
 180
 181             p = hdb_dbinfo_get_mkey_file(context, d);
 182             if (p) {
 183                 ctx->config.stash_file = strdup(p);
 184                 if (ctx->config.stash_file == NULL) {
 185                     hdb_free_dbinfo(context, &info);
 186                     return krb5_enomem(context);
 187                 }
 188             }
 189
 190             p = hdb_dbinfo_get_log_file(context, d);
 191             if (p) {
 192                 ctx->log_context.log_file = strdup(p);
 193                 if (ctx->log_context.log_file == NULL) {
 194                     hdb_free_dbinfo(context, &info);
 195                     return krb5_enomem(context);
 196                 }
 197             }
 198             break;
 199         }
 200         hdb_free_dbinfo(context, &info);
 201     }
 202
 203     /* If any of the values was unset, pick up the default value */
 204
 205     if (ctx->config.dbname == NULL) {
 206         ctx->config.dbname = strdup(hdb_default_db(context));
 207         if (ctx->config.dbname == NULL)
 208             return krb5_enomem(context);
 209     }
 210     if (ctx->config.acl_file == NULL) {
 211         aret = asprintf(&ctx->config.acl_file, "%s/kadmind.acl",
 212                         hdb_db_dir(context));
 213         if (aret == -1)
 214             return krb5_enomem(context);
 215     }
 216     if (ctx->config.stash_file == NULL) {
 217         aret = asprintf(&ctx->config.stash_file, "%s/m-key",
 218                         hdb_db_dir(context));
 219         if (aret == -1)
 220             return krb5_enomem(context);
 221     }
 222     if (ctx->log_context.log_file == NULL) {
 223         aret = asprintf(&ctx->log_context.log_file, "%s/log",
 224                         hdb_db_dir(context));
 225         if (aret == -1)
 226             return krb5_enomem(context);
 227     }
 228
 229 #ifndef NO_UNIX_SOCKETS
 230     set_socket_name(context, &ctx->log_context.socket_name);
 231 #else
 232     set_socket_info(context, &ctx->log_context.socket_info);
 233 #endif
 234
 235     return 0;
 236 }
 237
 238 kadm5_ret_t
 239 _kadm5_s_init_context(kadm5_server_context **ctx,
 240                       kadm5_config_params *params,
 241                       krb5_context context)
 242 {
 243     kadm5_ret_t ret = 0;
 244
 245     *ctx = calloc(1, sizeof(**ctx));
 246     if (*ctx == NULL)
 247         return krb5_enomem(context);
 248     (*ctx)->log_context.socket_fd = rk_INVALID_SOCKET;
 249
 250     set_funcs(*ctx);
 251     (*ctx)->context = context;
 252     krb5_add_et_list (context, initialize_kadm5_error_table_r);
 253
 254 #define is_set(M) (params && params->mask & KADM5_CONFIG_ ## M)
 255     if (params)
 256         (*ctx)->config.mask = params->mask;
 257     if (is_set(REALM)) {
 258         (*ctx)->config.realm = strdup(params->realm);
 259         if ((*ctx)->config.realm == NULL)
 260             return krb5_enomem(context);
 261     } else {
 262         ret = krb5_get_default_realm(context, &(*ctx)->config.realm);
 263         if (ret)
 264             return ret;
 265     }
 266     if (is_set(DBNAME)) {
 267         (*ctx)->config.dbname = strdup(params->dbname);
 268         if ((*ctx)->config.dbname == NULL)
 269             return krb5_enomem(context);
 270     }
 271     if (is_set(ACL_FILE)) {
 272         (*ctx)->config.acl_file = strdup(params->acl_file);
 273         if ((*ctx)->config.acl_file == NULL)
 274             return krb5_enomem(context);
 275     }
 276     if (is_set(STASH_FILE)) {
 277         (*ctx)->config.stash_file = strdup(params->stash_file);
 278         if ((*ctx)->config.stash_file == NULL)
 279             return krb5_enomem(context);
 280     }
 281
 282     ret = find_db_spec(*ctx);
 283     if (ret == 0)
 284         ret = _kadm5_s_init_hooks(*ctx);
 285     if (ret != 0) {
 286         kadm5_s_destroy(*ctx);
 287         *ctx = NULL;
 288         return ret;
 289     }
 290
 291     /* PROFILE can't be specified for now */
 292     /* KADMIND_PORT is supposed to be used on the server also,
 293        but this doesn't make sense */
 294     /* ADMIN_SERVER is client only */
 295     /* ADNAME is not used at all (as far as I can tell) */
 296     /* ADB_LOCKFILE ditto */
 297     /* DICT_FILE */
 298     /* ADMIN_KEYTAB */
 299     /* MKEY_FROM_KEYBOARD is not supported */
 300     /* MKEY_NAME neither */
 301     /* ENCTYPE */
 302     /* MAX_LIFE */
 303     /* MAX_RLIFE */
 304     /* EXPIRATION */
 305     /* FLAGS */
 306     /* ENCTYPES */
 307
 308     return 0;
 309 }
 310
 311 HDB *
 312 _kadm5_s_get_db(void *server_handle)
 313 {
 314     kadm5_server_context *context = server_handle;
 315     return context->db;
 316 }