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authorSchanzenbach, Martin <martin.schanzenbach@aisec.fraunhofer.de>2018-08-16 18:48:04 +0200
committerSchanzenbach, Martin <martin.schanzenbach@aisec.fraunhofer.de>2018-08-16 18:48:04 +0200
commit1940b899b3620786b0265144ab756a3f05bcc8b0 (patch)
tree92e16378a5b6f6211bf937597b429b6c092b04bb /src/zklaim/plugin_reclaim_attribute_zklaim.c
parent5ef8d3c6cbe7970bc9c9e54b4ab23c8727200b15 (diff)
start zklaim service
Diffstat (limited to 'src/zklaim/plugin_reclaim_attribute_zklaim.c')
-rw-r--r--src/zklaim/plugin_reclaim_attribute_zklaim.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/src/zklaim/plugin_reclaim_attribute_zklaim.c b/src/zklaim/plugin_reclaim_attribute_zklaim.c
new file mode 100644
index 000000000..a79576cb1
--- /dev/null
+++ b/src/zklaim/plugin_reclaim_attribute_zklaim.c
@@ -0,0 +1,181 @@
+/*
+ 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 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/>.
+*/
+
+/**
+ * @file zklaim/plugin_reclaim_attribute_zklaim.c
+ * @brief identity attribute plugin to provide the API for ZKlaims
+ *
+ * @author Martin Schanzenbach
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_reclaim_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 *
+zklaim_value_to_string (void *cls,
+ uint32_t type,
+ const void *data,
+ size_t data_size)
+{
+
+ switch (type)
+ {
+ case GNUNET_RECLAIM_ATTRIBUTE_TYPE_ZKLAIM:
+ 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
+zklaim_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_RECLAIM_ATTRIBUTE_TYPE_ZKLAIM:
+ *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;
+} zklaim_name_map[] = {
+ { "ZKLAIM", GNUNET_RECLAIM_ATTRIBUTE_TYPE_ZKLAIM },
+ { NULL, UINT32_MAX }
+};
+
+
+/**
+ * Convert a type name to the corresponding number.
+ *
+ * @param cls closure, unused
+ * @param zklaim_typename name to convert
+ * @return corresponding number, UINT32_MAX on error
+ */
+static uint32_t
+zklaim_typename_to_number (void *cls,
+ const char *zklaim_typename)
+{
+ unsigned int i;
+
+ i=0;
+ while ( (NULL != zklaim_name_map[i].name) &&
+ (0 != strcasecmp (zklaim_typename,
+ zklaim_name_map[i].name)) )
+ i++;
+ return zklaim_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 *
+zklaim_number_to_typename (void *cls,
+ uint32_t type)
+{
+ unsigned int i;
+
+ i=0;
+ while ( (NULL != zklaim_name_map[i].name) &&
+ (type != zklaim_name_map[i].number) )
+ i++;
+ return zklaim_name_map[i].name;
+}
+
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls NULL
+ * @return the exported block API
+ */
+void *
+libgnunet_plugin_reclaim_attribute_zklaim_init (void *cls)
+{
+ struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api;
+
+ api = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions);
+ api->value_to_string = &zklaim_value_to_string;
+ api->string_to_value = &zklaim_string_to_value;
+ api->typename_to_number = &zklaim_typename_to_number;
+ api->number_to_typename = &zklaim_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_reclaim_attribute_zklaim_done (void *cls)
+{
+ struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api = cls;
+
+ GNUNET_free (api);
+ return NULL;
+}
+
+/* end of plugin_reclaim_attribute_type_zklaim.c */