1 files changed, 173 insertions, 0 deletions

diff --git a/src/escrow/plugin_gnsrecord_escrow.c b/src/escrow/plugin_gnsrecord_escrow.c
new file mode 100644
index 000000000..82ed3af96
--- /dev/null
+++ b/src/escrow/plugin_gnsrecord_escrow.c
@@ -0,0 +1,173 @@
+/*
+     This file is part of GNUnet
+     Copyright (C) 2020 GNUnet e.V.
+
+     GNUnet is free software: you can redistribute it and/or modify it
+     under the terms of the GNU Affero General Public License as published
+     by the Free Software Foundation, either version 3 of the License,
+     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
+     Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+/**
+ * @file escrow/plugin_gnsrecord_escrow.c
+ * @brief gnsrecord plugin to provide the API for escrow records
+ *
+ * @author Johannes Späth
+ */
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+
+#include "gnunet_gnsrecord_lib.h"
+#include "gnunet_gnsrecord_plugin.h"
+
+/**
+ * Convert the 'value' of a record to a string.
+ *
+ * @param cls closure, unused
+ * @param type type of the record
+ * @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 *
+value_to_string (void *cls, uint32_t type, const void *data, size_t data_size)
+{
+  switch (type)
+  {
+  case GNUNET_GNSRECORD_TYPE_ESCROW_KEYSHARE:
+    return GNUNET_STRINGS_data_to_string_alloc (data, data_size);
+  
+  default:
+    return NULL;
+  }
+}
+
+/**
+ * Convert human-readable version of a 'value' of a record to the binary
+ * representation.
+ *
+ * @param cls closure, unused
+ * @param type type of the record
+ * @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
+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_GNSRECORD_TYPE_ESCROW_KEYSHARE:
+      return GNUNET_STRINGS_string_to_data (s, strlen (s), *data, *data_size);
+
+    default:
+      return GNUNET_SYSERR;
+  }
+}
+
+
+/**
+ * Mapping of record type numbers to human-readable
+ * record type names.
+ */
+static struct
+{
+  const char *name;
+  uint32_t number;
+} name_map[] = {
+  { "GNUNET_GNSRECORD_TYPE_ESCROW_KEYSHARE", GNUNET_GNSRECORD_TYPE_ESCROW_KEYSHARE },
+  { NULL, UINT32_MAX }
+};
+
+
+/**
+ * Convert a type name (i.e. "AAAA") to the corresponding number.
+ *
+ * @param cls closure, unused
+ * @param dns_typename name to convert
+ * @return corresponding number, UINT32_MAX on error
+ */
+static uint32_t
+typename_to_number (void *cls, const char *dns_typename)
+{
+  unsigned int i;
+
+  i = 0;
+  while ((NULL != name_map[i].name) &&
+         (0 != strcasecmp (dns_typename, name_map[i].name)))
+    i++;
+  return name_map[i].number;
+}
+
+
+/**
+ * Convert a type number (i.e. 1) to the corresponding type string (i.e. "A")
+ *
+ * @param cls closure, unused
+ * @param type number of a type to convert
+ * @return corresponding typestring, NULL on error
+ */
+static const char *
+number_to_typename (void *cls, uint32_t type)
+{
+  unsigned int i;
+
+  i = 0;
+  while ((NULL != name_map[i].name) && (type != name_map[i].number))
+    i++;
+  return name_map[i].name;
+}
+
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls NULL
+ * @return the exported block API
+ */
+void *
+libgnunet_plugin_gnsrecord_escrow_init (void *cls)
+{
+  struct GNUNET_GNSRECORD_PluginFunctions *api;
+
+  api = GNUNET_new (struct GNUNET_GNSRECORD_PluginFunctions);
+  api->value_to_string = &value_to_string;
+  api->string_to_value = &string_to_value;
+  api->typename_to_number = &typename_to_number;
+  api->number_to_typename = &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_gnsrecord_escrow_done (void *cls)
+{
+  struct GNUNET_GNSRECORD_PluginFunctions *api = cls;
+
+  GNUNET_free (api);
+  return NULL;
+}
+
+
+/* end of plugin_gnsrecord_escrow.c */