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         return ret;
  62
  63     context->keep_open = 1;
  64     return 0;
  65 }
  66
  67 static kadm5_ret_t
  68 kadm5_s_unlock(void *server_handle)
  69 {
  70     kadm5_server_context *context = server_handle;
  71     kadm5_ret_t ret;
  72
  73     if (!context->keep_open)
  74         return KADM5_NOT_LOCKED;
  75
  76     context->keep_open = 0;
  77     ret = context->db->hdb_unlock(context->context, context->db);
  78     (void) context->db->hdb_close(context->context, context->db);
  79     return ret;
  80 }
  81
  82 static void
  83 set_funcs(kadm5_server_context *c)
  84 {
  85 #define SET(C, F) (C)->funcs.F = kadm5_s_ ## F
  86     SET(c, chpass_principal);
  87     SET(c, chpass_principal_with_key);
  88     SET(c, create_principal);
  89     SET(c, delete_principal);
  90     SET(c, destroy);
  91     SET(c, flush);
  92     SET(c, get_principal);
  93     SET(c, get_principals);
  94     SET(c, get_privs);
  95     SET(c, modify_principal);
  96     SET(c, randkey_principal);
  97     SET(c, rename_principal);
  98     SET(c, lock);
  99     SET(c, unlock);
 100 }
 101
 102 #ifndef NO_UNIX_SOCKETS
 103
 104 static void
 105 set_socket_name(krb5_context context, struct sockaddr_un *un)
 106 {
 107     const char *fn = kadm5_log_signal_socket(context);
 108
 109     memset(un, 0, sizeof(*un));
 110     un->sun_family = AF_UNIX;
 111     strlcpy (un->sun_path, fn, sizeof(un->sun_path));
 112
 113 }
 114 #else
 115
 116 static void
 117 set_socket_info(krb5_context context, struct addrinfo **info)
 118 {
 119     kadm5_log_signal_socket_info(context, 0, info);
 120 }
 121
 122 #endif
 123
 124 static kadm5_ret_t
 125 find_db_spec(kadm5_server_context *ctx)
 126 {
 127     krb5_context context = ctx->context;
 128     struct hdb_dbinfo *info, *d;
 129     krb5_error_code ret;
 130     int aret;
 131
 132     if (ctx->config.realm) {
 133         /* fetch the databases */
 134         ret = hdb_get_dbinfo(context, &info);
 135         if (ret)
 136             return ret;
 137
 138         d = NULL;
 139         while ((d = hdb_dbinfo_get_next(info, d)) != NULL) {
 140             const char *p = hdb_dbinfo_get_realm(context, d);
 141
 142             /* match default (realm-less) */
 143             if(p != NULL && strcmp(ctx->config.realm, p) != 0)
 144                 continue;
 145
 146             p = hdb_dbinfo_get_dbname(context, d);
 147             if (p)
 148                 ctx->config.dbname = strdup(p);
 149
 150             p = hdb_dbinfo_get_acl_file(context, d);
 151             if (p)
 152                 ctx->config.acl_file = strdup(p);
 153
 154             p = hdb_dbinfo_get_mkey_file(context, d);
 155             if (p)
 156                 ctx->config.stash_file = strdup(p);
 157
 158             p = hdb_dbinfo_get_log_file(context, d);
 159             if (p)
 160                 ctx->log_context.log_file = strdup(p);
 161             break;
 162         }
 163         hdb_free_dbinfo(context, &info);
 164     }
 165
 166     /* If any of the values was unset, pick up the default value */
 167
 168     if (ctx->config.dbname == NULL)
 169         ctx->config.dbname = strdup(hdb_default_db(context));
 170     if (ctx->config.acl_file == NULL) {
 171         aret = asprintf(&ctx->config.acl_file, "%s/kadmind.acl",
 172                         hdb_db_dir(context));
 173         if (aret == -1)
 174             return ENOMEM;
 175     }
 176     if (ctx->config.stash_file == NULL) {
 177         aret = asprintf(&ctx->config.stash_file, "%s/m-key",
 178                         hdb_db_dir(context));
 179         if (aret == -1)
 180             return ENOMEM;
 181     }
 182     if (ctx->log_context.log_file == NULL) {
 183         aret = asprintf(&ctx->log_context.log_file, "%s/log",
 184                         hdb_db_dir(context));
 185         if (aret == -1)
 186             return ENOMEM;
 187     }
 188
 189 #ifndef NO_UNIX_SOCKETS
 190     set_socket_name(context, &ctx->log_context.socket_name);
 191 #else
 192     set_socket_info(context, &ctx->log_context.socket_info);
 193 #endif
 194
 195     return 0;
 196 }
 197
 198 kadm5_ret_t
 199 _kadm5_s_init_context(kadm5_server_context **ctx,
 200                       kadm5_config_params *params,
 201                       krb5_context context)
 202 {
 203     *ctx = malloc(sizeof(**ctx));
 204     if(*ctx == NULL)
 205         return ENOMEM;
 206     memset(*ctx, 0, sizeof(**ctx));
 207     set_funcs(*ctx);
 208     (*ctx)->context = context;
 209     krb5_add_et_list (context, initialize_kadm5_error_table_r);
 210 #define is_set(M) (params && params->mask & KADM5_CONFIG_ ## M)
 211     if(is_set(REALM))
 212         (*ctx)->config.realm = strdup(params->realm);
 213     else
 214         krb5_get_default_realm(context, &(*ctx)->config.realm);
 215     if(is_set(DBNAME))
 216         (*ctx)->config.dbname = strdup(params->dbname);
 217     if(is_set(ACL_FILE))
 218         (*ctx)->config.acl_file = strdup(params->acl_file);
 219     if(is_set(STASH_FILE))
 220         (*ctx)->config.stash_file = strdup(params->stash_file);
 221
 222     find_db_spec(*ctx);
 223
 224     /* PROFILE can't be specified for now */
 225     /* KADMIND_PORT is supposed to be used on the server also,
 226        but this doesn't make sense */
 227     /* ADMIN_SERVER is client only */
 228     /* ADNAME is not used at all (as far as I can tell) */
 229     /* ADB_LOCKFILE ditto */
 230     /* DICT_FILE */
 231     /* ADMIN_KEYTAB */
 232     /* MKEY_FROM_KEYBOARD is not supported */
 233     /* MKEY_NAME neither */
 234     /* ENCTYPE */
 235     /* MAX_LIFE */
 236     /* MAX_RLIFE */
 237     /* EXPIRATION */
 238     /* FLAGS */
 239     /* ENCTYPES */
 240
 241     return 0;
 242 }
 243
 244 HDB *
 245 _kadm5_s_get_db(void *server_handle)
 246 {
 247     kadm5_server_context *context = server_handle;
 248     return context->db;
 249 }