1 files changed, 277 insertions, 0 deletions

diff --git a/src/include/gnunet_identity_attribute_lib.h b/src/include/gnunet_identity_attribute_lib.h
new file mode 100644
index 000000000..316b0bf95
--- /dev/null
+++ b/src/include/gnunet_identity_attribute_lib.h
@@ -0,0 +1,277 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2017 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.
+*/
+
+/**
+ * @author Martin Schanzenbach
+ *
+ * @file
+ * Identity attribute definitions
+ *
+ * @defgroup identity-provider  Identity Provider service
+ * @{
+ */
+#ifndef GNUNET_IDENTITY_ATTRIBUTE_LIB_H
+#define GNUNET_IDENTITY_ATTRIBUTE_LIB_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0                           /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+#include "gnunet_util_lib.h"
+
+
+/**
+ * No value attribute.
+ */
+#define GNUNET_IDENTITY_ATTRIBUTE_TYPE_NONE 0
+
+/**
+ * String attribute.
+ */
+#define GNUNET_IDENTITY_ATTRIBUTE_TYPE_STRING 1
+
+
+
+/**
+ * An attribute.
+ */
+struct GNUNET_IDENTITY_ATTRIBUTE_Claim
+{
+  /**
+   * The name of the attribute. Note "name" must never be individually
+   * free'd
+   */
+  const char* name;
+
+  /**
+   * Type of Claim
+   */
+  uint32_t type;
+
+  /**
+   * Version
+   */
+  uint32_t version;
+
+  /**
+   * Number of bytes in @e data.
+   */
+  size_t data_size;
+
+  /**
+   * Binary value stored as attribute value.  Note: "data" must never
+   * be individually 'malloc'ed, but instead always points into some
+   * existing data area.
+   */
+  const void *data;
+
+};
+
+struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList
+{
+  /**
+   * List head
+   */
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *list_head;
+
+  /**
+   * List tail
+   */
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *list_tail;
+};
+
+struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry
+{
+  /**
+   * DLL
+   */
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *prev;
+
+  /**
+   * DLL
+   */
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *next;
+
+  /**
+   * The attribute claim
+   */
+  struct GNUNET_IDENTITY_ATTRIBUTE_Claim *claim;
+};
+
+/**
+ * Create a new attribute claim.
+ *
+ * @param attr_name the attribute name
+ * @param type the attribute type
+ * @param data the attribute value
+ * @param data_size the attribute value size
+ * @return the new attribute
+ */
+struct GNUNET_IDENTITY_ATTRIBUTE_Claim *
+GNUNET_IDENTITY_ATTRIBUTE_claim_new (const char* attr_name,
+                                     uint32_t type,
+                                     const void* data,
+                                     size_t data_size);
+
+
+/**
+ * Get required size for serialization buffer
+ *
+ * @param attrs the attribute list to serialize
+ *
+ * @return the required buffer size
+ */
+size_t
+GNUNET_IDENTITY_ATTRIBUTE_list_serialize_get_size (const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs);
+
+void
+GNUNET_IDENTITY_ATTRIBUTE_list_destroy (struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs);
+
+
+/**
+ * Serialize an attribute list
+ *
+ * @param attrs the attribute list to serialize
+ * @param result the serialized attribute
+ *
+ * @return length of serialized data
+ */
+size_t
+GNUNET_IDENTITY_ATTRIBUTE_list_serialize (const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs,
+                     char *result);
+
+/**
+ * Deserialize an attribute list
+ *
+ * @param data the serialized attribute list
+ * @param data_size the length of the serialized data
+ *
+ * @return a GNUNET_IDENTITY_PROVIDER_AttributeList, must be free'd by caller
+ */
+struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *
+GNUNET_IDENTITY_ATTRIBUTE_list_deserialize (const char* data,
+                            size_t data_size);
+
+
+/**
+ * Get required size for serialization buffer
+ *
+ * @param attr the attribute to serialize
+ *
+ * @return the required buffer size
+ */
+size_t
+GNUNET_IDENTITY_ATTRIBUTE_serialize_get_size (const struct GNUNET_IDENTITY_ATTRIBUTE_Claim *attr);
+
+
+
+/**
+ * Serialize an attribute
+ *
+ * @param attr the attribute to serialize
+ * @param result the serialized attribute
+ *
+ * @return length of serialized data
+ */
+size_t
+GNUNET_IDENTITY_ATTRIBUTE_serialize (const struct GNUNET_IDENTITY_ATTRIBUTE_Claim *attr,
+                     char *result);
+
+/**
+ * Deserialize an attribute
+ *
+ * @param data the serialized attribute
+ * @param data_size the length of the serialized data
+ *
+ * @return a GNUNET_IDENTITY_PROVIDER_Attribute, must be free'd by caller
+ */
+struct GNUNET_IDENTITY_ATTRIBUTE_Claim *
+GNUNET_IDENTITY_ATTRIBUTE_deserialize (const char* data,
+                       size_t data_size);
+
+struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList*
+GNUNET_IDENTITY_ATTRIBUTE_list_dup (const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs);
+
+/**
+ * Convert a type name to the corresponding number
+ *
+ * @param typename name to convert
+ * @return corresponding number, UINT32_MAX on error
+ */
+uint32_t
+GNUNET_IDENTITY_ATTRIBUTE_typename_to_number (const char *typename);
+
+/**
+ * Convert human-readable version of a 'claim' of an attribute to the binary
+ * representation
+ *
+ * @param type type of the claim
+ * @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
+ */
+int
+GNUNET_IDENTITY_ATTRIBUTE_string_to_value (uint32_t type,
+                                           const char *s,
+                                           void **data,
+                                           size_t *data_size);
+
+/**
+ * Convert the 'claim' of an attribute to a string
+ *
+ * @param type the type of attribute
+ * @param data claim in binary encoding
+ * @param data_size number of bytes in @a data
+ * @return NULL on error, otherwise human-readable representation of the claim
+ */
+char *
+GNUNET_IDENTITY_ATTRIBUTE_value_to_string (uint32_t type,
+                                           const void* data,
+                                           size_t data_size);
+
+/**
+ * Convert a type number to the corresponding type string
+ *
+ * @param type number of a type
+ * @return corresponding typestring, NULL on error
+ */
+const char*
+GNUNET_IDENTITY_ATTRIBUTE_number_to_typename (uint32_t type);
+
+
+#if 0                           /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+
+/* ifndef GNUNET_IDENTITY_ATTRIBUTE_LIB_H */
+#endif
+
+/** @} */ /* end of group identity */
+
+/* end of gnunet_identity_attribute_lib.h */