2003-04-14 Havoc Pennington <hp@redhat.com>

	* dbus/dbus-userdb.c: user database abstraction, mostly to get
	caching, but at some point we might want to be able to use a
	different database.

	* bus/dispatch.c (bus_dispatch_sha1_test): add a test that uses
	SHA1 conf file to test the sha1 auth mechanism, since the regular
	test always uses EXTERNAL when available.

	* configure.in,
	test/data/valid-config-files/debug-allow-all-sha1.conf.in:
	add conf file that requires use of sha1 auth

1 files changed, 228 insertions, 0 deletions

diff --git a/dbus/dbus-userdb.c b/dbus/dbus-userdb.c
new file mode 100644
index 00000000..871fa5bd
--- /dev/null
+++ b/dbus/dbus-userdb.c
@@ -0,0 +1,228 @@
+/* -*- mode: C; c-file-style: "gnu" -*- */
+/* dbus-userdb.c User database abstraction
+ * 
+ * Copyright (C) 2003  Red Hat, Inc.
+ *
+ * Licensed under the Academic Free License version 1.2
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#include "dbus-userdb.h"
+#include "dbus-hash.h"
+#include "dbus-test.h"
+#include "dbus-internals.h"
+#include <string.h>
+
+typedef struct DBusUserEntry DBusUserEntry;
+
+struct DBusUserEntry
+{
+  dbus_uid_t  uid;
+
+  dbus_gid_t *group_ids;
+  int         n_group_ids;
+};
+
+struct DBusUserDatabase
+{
+  int refcount;
+
+  DBusHashTable *users;
+};
+
+static void
+free_user_entry (void *data)
+{
+  DBusUserEntry *entry = data;
+
+  if (entry == NULL) /* hash table will pass NULL */
+    return;
+
+  dbus_free (entry->group_ids);
+  
+  dbus_free (entry);
+}
+
+static DBusUserEntry*
+_dbus_user_database_lookup (DBusUserDatabase *db,
+                            dbus_uid_t        uid,
+                            DBusError        *error)
+{
+  DBusUserEntry *entry;
+
+  _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+  
+  entry = _dbus_hash_table_lookup_ulong (db->users, uid);
+  if (entry)
+    return entry;
+  else
+    {
+      entry = dbus_new0 (DBusUserEntry, 1);
+      if (entry == NULL)
+        {
+          dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+          return NULL;
+        }
+
+      if (!_dbus_get_groups (uid, &entry->group_ids, &entry->n_group_ids, error))
+        {
+          _DBUS_ASSERT_ERROR_IS_SET (error);
+          free_user_entry (entry);
+          return NULL;
+        }
+
+      if (!_dbus_hash_table_insert_ulong (db->users, entry->uid, entry))
+        {
+          dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+          free_user_entry (entry);
+          return NULL;
+        }
+
+      return entry;
+    }
+}
+
+/**
+ * @addtogroup DBusInternalsUtils
+ * @{
+ */
+
+/**
+ * Creates a new user database object used to look up and
+ * cache user information.
+ * @returns new database, or #NULL on out of memory
+ */
+DBusUserDatabase*
+_dbus_user_database_new (void)
+{
+  DBusUserDatabase *db;
+  
+  db = dbus_new0 (DBusUserDatabase, 1);
+  if (db == NULL)
+    return NULL;
+
+  db->refcount = 1;
+
+  db->users = _dbus_hash_table_new (DBUS_HASH_ULONG,
+                                    NULL, free_user_entry);
+
+  if (db->users == NULL)
+    goto failed;
+  
+  return db;
+  
+ failed:
+  _dbus_user_database_unref (db);
+  return NULL;
+}
+
+/**
+ * Increments refcount of user database.
+ * @param db the database
+ */
+void
+_dbus_user_database_ref (DBusUserDatabase  *db)
+{
+  _dbus_assert (db->refcount > 0);
+
+  db->refcount += 1;
+}
+
+/**
+ * Decrements refcount of user database.
+ * @param db the database
+ */
+void
+_dbus_user_database_unref (DBusUserDatabase  *db)
+{
+  _dbus_assert (db->refcount > 0);
+
+  db->refcount -= 1;
+  if (db->refcount == 0)
+    {
+      if (db->users)
+        _dbus_hash_table_unref (db->users);
+      
+      dbus_free (db);
+    }
+}
+
+/**
+ * Gets all groups for a particular user. Returns #FALSE
+ * if no memory, or user isn't known, but always initializes
+ * group_ids to a NULL array. Sets error to the reason
+ * for returning #FALSE.
+ *
+ * @param db the user database object
+ * @param uid the user ID
+ * @param group_ids return location for array of group IDs
+ * @param n_group_ids return location for length of returned array
+ * @param error return location for error
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+_dbus_user_database_get_groups (DBusUserDatabase  *db,
+                                dbus_uid_t         uid,
+                                dbus_gid_t       **group_ids,
+                                int               *n_group_ids,
+                                DBusError         *error)
+{
+  DBusUserEntry *entry;
+  
+  _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+  *group_ids = NULL;
+  *n_group_ids = 0;
+  
+  entry = _dbus_user_database_lookup (db, uid, error);
+  if (entry == NULL)
+    {
+      _DBUS_ASSERT_ERROR_IS_SET (error);
+      return FALSE;
+    }
+
+  if (entry->n_group_ids > 0)
+    {
+      *group_ids = dbus_new (dbus_gid_t, entry->n_group_ids);
+      if (*group_ids == NULL)
+        {
+          dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+          return FALSE;
+        }
+
+      *n_group_ids = entry->n_group_ids;
+
+      memcpy (*group_ids, entry->group_ids, entry->n_group_ids * sizeof (dbus_gid_t));
+    }
+
+  return TRUE;
+}
+
+/** @} */
+
+#ifdef DBUS_BUILD_TESTS
+/**
+ * Unit test for dbus-userdb.c.
+ * 
+ * @returns #TRUE on success.
+ */
+dbus_bool_t
+_dbus_userdb_test (const char *test_data_dir)
+{
+
+  return TRUE;
+}
+#endif /* DBUS_BUILD_TESTS */