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/*
This file is part of GNUnet
Copyright (C) 2010-2015 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/identity_attribute.c
* @brief helper library to manage identity attributes
* @author Martin Schanzenbach
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "identity_attribute.h"
/**
* Create a new attribute.
*
* @param 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_PROVIDER_Attribute *
attribute_new (const char* attr_name,
uint32_t attr_type,
const void* data,
size_t data_size)
{
struct GNUNET_IDENTITY_PROVIDER_Attribute *attr;
char *write_ptr;
attr = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_Attribute) +
strlen (attr_name) + 1 +
data_size);
attr->attribute_type = attr_type;
attr->data_size = data_size;
write_ptr = (char*)&attr[1];
GNUNET_memcpy (write_ptr,
attr_name,
strlen (attr_name) + 1);
attr->name = write_ptr;
write_ptr += strlen (attr->name) + 1;
GNUNET_memcpy (write_ptr,
data,
data_size);
attr->data = write_ptr;
return attr;
}
size_t
attribute_list_serialize_get_size (const struct GNUNET_IDENTITY_PROVIDER_AttributeList *attrs)
{
struct GNUNET_IDENTITY_PROVIDER_AttributeListEntry *le;
size_t len = 0;
for (le = attrs->list_head; NULL != le; le = le->next)
len += attribute_serialize_get_size (le->attribute);
return len;
}
size_t
attribute_list_serialize (const struct GNUNET_IDENTITY_PROVIDER_AttributeList *attrs,
char *result)
{
struct GNUNET_IDENTITY_PROVIDER_AttributeListEntry *le;
size_t len;
size_t total_len;
char* write_ptr;
write_ptr = result;
total_len = 0;
for (le = attrs->list_head; NULL != le; le = le->next)
{
len = attribute_serialize (le->attribute,
write_ptr);
total_len += len;
write_ptr += len;
}
return total_len;
}
struct GNUNET_IDENTITY_PROVIDER_AttributeList *
attribute_list_deserialize (const char* data,
size_t data_size)
{
struct GNUNET_IDENTITY_PROVIDER_AttributeList *attrs;
struct GNUNET_IDENTITY_PROVIDER_AttributeListEntry *le;
size_t attr_len;
const char* read_ptr;
if (data_size < sizeof (struct Attribute))
return NULL;
attrs = GNUNET_new (struct GNUNET_IDENTITY_PROVIDER_AttributeList);
read_ptr = data;
while (((data + data_size) - read_ptr) >= sizeof (struct Attribute))
{
le = GNUNET_new (struct GNUNET_IDENTITY_PROVIDER_AttributeListEntry);
le->attribute = attribute_deserialize (read_ptr,
data_size - (read_ptr - data));
attr_len = attribute_serialize_get_size (le->attribute);
read_ptr += attr_len;
}
return attrs;
}
size_t
attribute_serialize_get_size (const struct GNUNET_IDENTITY_PROVIDER_Attribute *attr)
{
return sizeof (struct Attribute)
+ strlen (attr->name)
+ attr->data_size; //TODO get data_size from plugin
}
size_t
attribute_serialize (const struct GNUNET_IDENTITY_PROVIDER_Attribute *attr,
char *result)
{
size_t data_len_ser;
size_t name_len;
struct Attribute *attr_ser;
char* write_ptr;
attr_ser = (struct Attribute*)result;
attr_ser->attribute_type = htons (attr->attribute_type);
name_len = strlen (attr->name);
attr_ser->name_len = htons (name_len);
write_ptr = (char*)&attr_ser[1];
GNUNET_memcpy (write_ptr, attr->name, name_len);
write_ptr += name_len;
//TODO plugin-ize
//data_len_ser = plugin->serialize_attribute_value (attr,
// &attr_ser[1]);
data_len_ser = attr->data_size;
GNUNET_memcpy (write_ptr, attr->data, attr->data_size);
attr_ser->data_size = htons (data_len_ser);
return sizeof (struct Attribute) + strlen (attr->name) + attr->data_size;
}
struct GNUNET_IDENTITY_PROVIDER_Attribute *
attribute_deserialize (const char* data,
size_t data_size)
{
struct GNUNET_IDENTITY_PROVIDER_Attribute *attr;
struct Attribute *attr_ser;
size_t data_len;
size_t name_len;
char* write_ptr;
if (data_size < sizeof (struct Attribute))
return NULL;
attr_ser = (struct Attribute*)data;
//TODO use plugin.
data_len = ntohs (attr_ser->data_size);
name_len = ntohs (attr_ser->name_len);
attr = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_Attribute)
+ data_len + name_len + 1);
attr->attribute_type = ntohs (attr_ser->attribute_type);
attr->data_size = ntohs (attr_ser->data_size);
write_ptr = (char*)&attr[1];
GNUNET_memcpy (write_ptr,
&attr_ser[1],
name_len);
write_ptr[name_len] = '\0';
attr->name = write_ptr;
write_ptr += name_len + 1;
GNUNET_memcpy (write_ptr,
(char*)&attr_ser[1] + name_len,
attr->data_size);
attr->data = write_ptr;
return attr;
}
/* end of identity_attribute.c */
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