1 files changed, 184 insertions, 0 deletions

diff --git a/src/identity-attribute/plugin_identity_attribute_gnuid.c b/src/identity-attribute/plugin_identity_attribute_gnuid.c
new file mode 100644
index 000000000..006b45ea2
--- /dev/null
+++ b/src/identity-attribute/plugin_identity_attribute_gnuid.c
@@ -0,0 +1,184 @@
+/*
+     This file is part of GNUnet
+     Copyright (C) 2013, 2014, 2016 GNUnet e.V.
+
+     GNUnet 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 3, or (at your
+     option) any later version.
+
+     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+     Boston, MA 02110-1301, USA.
+*/
+
+/**
+ * @file identity-attribute/plugin_identity_attribute_gnuid.c
+ * @brief identity attribute plugin to provide the API for fundamental 
+ *                 attribute types.
+ *
+ * @author Martin Schanzenbach
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_identity_attribute_plugin.h"
+#include <inttypes.h>
+
+
+/**
+ * Convert the 'value' of an attribute to a string.
+ *
+ * @param cls closure, unused
+ * @param type type of the attribute
+ * @param data value in binary encoding
+ * @param data_size number of bytes in @a data
+ * @return NULL on error, otherwise human-readable representation of the value
+ */
+static char *
+gnuid_value_to_string (void *cls,
+                     uint32_t type,
+                     const void *data,
+                     size_t data_size)
+{
+
+  switch (type)
+  {
+  case GNUNET_IDENTITY_ATTRIBUTE_TYPE_STRING:
+    return GNUNET_strndup (data, data_size);
+  default:
+    return NULL;
+  }
+}
+
+
+/**
+ * Convert human-readable version of a 'value' of an attribute to the binary
+ * representation.
+ *
+ * @param cls closure, unused
+ * @param type type of the attribute
+ * @param s human-readable string
+ * @param data set to value in binary encoding (will be allocated)
+ * @param data_size set to number of bytes in @a data
+ * @return #GNUNET_OK on success
+ */
+static int
+gnuid_string_to_value (void *cls,
+                     uint32_t type,
+                     const char *s,
+                     void **data,
+                     size_t *data_size)
+{
+  if (NULL == s)
+    return GNUNET_SYSERR;
+  switch (type)
+  {
+
+    case GNUNET_IDENTITY_ATTRIBUTE_TYPE_STRING:
+      *data = GNUNET_strdup (s);
+      *data_size = strlen (s);
+      return GNUNET_OK;
+    default:
+      return GNUNET_SYSERR;
+  }
+}
+
+
+/**
+ * Mapping of attribute type numbers to human-readable
+ * attribute type names.
+ */
+static struct {
+  const char *name;
+  uint32_t number;
+} gnuid_name_map[] = {
+  { "STRING",  GNUNET_IDENTITY_ATTRIBUTE_TYPE_STRING },
+  { NULL, UINT32_MAX }
+};
+
+
+/**
+ * Convert a type name to the corresponding number.
+ *
+ * @param cls closure, unused
+ * @param gnuid_typename name to convert
+ * @return corresponding number, UINT32_MAX on error
+ */
+static uint32_t
+gnuid_typename_to_number (void *cls,
+                        const char *gnuid_typename)
+{
+  unsigned int i;
+
+  i=0;
+  while ( (NULL != gnuid_name_map[i].name) &&
+          (0 != strcasecmp (gnuid_typename,
+                            gnuid_name_map[i].name)) )
+    i++;
+  return gnuid_name_map[i].number;
+}
+
+
+/**
+ * Convert a type number (i.e. 1) to the corresponding type string
+ *
+ * @param cls closure, unused
+ * @param type number of a type to convert
+ * @return corresponding typestring, NULL on error
+ */
+static const char *
+gnuid_number_to_typename (void *cls,
+                        uint32_t type)
+{
+  unsigned int i;
+
+  i=0;
+  while ( (NULL != gnuid_name_map[i].name) &&
+          (type != gnuid_name_map[i].number) )
+    i++;
+  return gnuid_name_map[i].name;
+}
+
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls NULL
+ * @return the exported block API
+ */
+void *
+libgnunet_plugin_identity_attribute_gnuid_init (void *cls)
+{
+  struct GNUNET_IDENTITY_ATTRIBUTE_PluginFunctions *api;
+
+  api = GNUNET_new (struct GNUNET_IDENTITY_ATTRIBUTE_PluginFunctions);
+  api->value_to_string = &gnuid_value_to_string;
+  api->string_to_value = &gnuid_string_to_value;
+  api->typename_to_number = &gnuid_typename_to_number;
+  api->number_to_typename = &gnuid_number_to_typename;
+  return api;
+}
+
+
+/**
+ * Exit point from the plugin.
+ *
+ * @param cls the return value from #libgnunet_plugin_block_test_init()
+ * @return NULL
+ */
+void *
+libgnunet_plugin_identity_attribute_gnuid_done (void *cls)
+{
+  struct GNUNET_IDENTITY_ATTRIBUTE_PluginFunctions *api = cls;
+
+  GNUNET_free (api);
+  return NULL;
+}
+
+/* end of plugin_identity_attribute_type_gnuid.c */