1 files changed, 267 insertions, 0 deletions

diff --git a/src/identity-provider/plugin_gnsrecord_identity_provider.c b/src/identity-provider/plugin_gnsrecord_identity_provider.c
new file mode 100644
index 000000000..6ed0b0852
--- /dev/null
+++ b/src/identity-provider/plugin_gnsrecord_identity_provider.c
@@ -0,0 +1,267 @@
+/*
+     This file is part of GNUnet
+     Copyright (C) 2013, 2014 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-provider/plugin_gnsrecord_identity_provider.c
+ * @brief gnsrecord plugin to provide the API for identity records
+ * @author Martin Schanzenbach
+ */
+#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)
+{
+  const struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe_privkey;
+  const struct GNUNET_CRYPTO_EcdsaPublicKey *audience_pubkey;
+  const char *scopes;
+  char *ecdhe_str;
+  char *aud_str;
+  char *result;
+
+  switch (type)
+  {
+    case GNUNET_GNSRECORD_TYPE_ID_ATTR:
+      return GNUNET_STRINGS_data_to_string_alloc (data, data_size);
+    case GNUNET_GNSRECORD_TYPE_ID_TOKEN: //DEPRECATED
+      return GNUNET_strndup (data, data_size);
+    case GNUNET_GNSRECORD_TYPE_ABE_KEY:
+    case GNUNET_GNSRECORD_TYPE_ABE_MASTER:
+      return GNUNET_STRINGS_data_to_string_alloc (data, data_size); 
+    case GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA: //DEPRECATED
+        ecdhe_privkey = data;
+        audience_pubkey = data+sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey);
+        scopes =  (char*) audience_pubkey+(sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
+        ecdhe_str = GNUNET_STRINGS_data_to_string_alloc (ecdhe_privkey,
+                                                        sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
+        aud_str = GNUNET_STRINGS_data_to_string_alloc (audience_pubkey,
+                                                       sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
+        GNUNET_asprintf (&result,
+                         "%s;%s;%s",
+                         ecdhe_str, aud_str, scopes);
+        GNUNET_free (aud_str);
+        GNUNET_free (ecdhe_str);
+        return result;
+
+    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)
+{
+  char* ecdhe_str;
+  char* aud_keystr;
+  char* write_ptr;
+  char* tmp_tok;
+  char* str;
+
+  if (NULL == s)
+    return GNUNET_SYSERR;
+  switch (type)
+  {
+    case GNUNET_GNSRECORD_TYPE_ID_ATTR:
+      return GNUNET_STRINGS_string_to_data (s,
+                                            strlen (s),
+                                            *data,
+                                            *data_size);
+    case GNUNET_GNSRECORD_TYPE_ID_TOKEN:
+      *data = GNUNET_strdup (s);
+      *data_size = strlen (s);
+      return GNUNET_OK;
+    case GNUNET_GNSRECORD_TYPE_ABE_KEY:
+    case GNUNET_GNSRECORD_TYPE_ABE_MASTER:
+      return GNUNET_STRINGS_string_to_data (s,
+                                            strlen (s),
+                                            *data,
+                                            *data_size);
+    case GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA:
+      tmp_tok = GNUNET_strdup (s);
+      ecdhe_str = strtok (tmp_tok, ";");
+      if (NULL == ecdhe_str)
+      {
+        GNUNET_free (tmp_tok);
+        return GNUNET_SYSERR;
+      }
+      aud_keystr = strtok (NULL, ";");
+      if (NULL == aud_keystr)
+      {
+        GNUNET_free (tmp_tok);
+        return GNUNET_SYSERR;
+      }
+      str = strtok (NULL, ";");
+      if (NULL == str)
+      {
+        GNUNET_free (tmp_tok);
+        return GNUNET_SYSERR;
+      }
+      *data_size = strlen (str) + 1
+        +sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey)
+        +sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
+      *data = GNUNET_malloc (*data_size);
+
+      write_ptr = *data;
+      GNUNET_STRINGS_string_to_data (ecdhe_str,
+                                     strlen (ecdhe_str),
+                                     write_ptr,
+                                     sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
+      write_ptr += sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey);
+      GNUNET_STRINGS_string_to_data (aud_keystr,
+                                     strlen (aud_keystr),
+                                     write_ptr,
+                                     sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
+      write_ptr += sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
+      GNUNET_memcpy (write_ptr, str, strlen (str) + 1); //with 0-Terminator
+      GNUNET_free (tmp_tok);
+      return GNUNET_OK;
+
+    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[] = {
+  { "ID_ATTR", GNUNET_GNSRECORD_TYPE_ID_ATTR },
+  { "ID_TOKEN", GNUNET_GNSRECORD_TYPE_ID_TOKEN },
+  { "ABE_KEY", GNUNET_GNSRECORD_TYPE_ABE_KEY },
+  { "ABE_MASTER", GNUNET_GNSRECORD_TYPE_ABE_MASTER },
+  { "ID_TOKEN_METADATA", GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA },
+  { 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_identity_provider_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_identity_provider_done (void *cls)
+{
+  struct GNUNET_GNSRECORD_PluginFunctions *api = cls;
+
+  GNUNET_free (api);
+  return NULL;
+}
+
+/* end of plugin_gnsrecord_dns.c */