BUILD: Move reclaim to service

1 files changed, 0 insertions, 1004 deletions

diff --git a/src/reclaim/reclaim_credential.c b/src/reclaim/reclaim_credential.c
deleted file mode 100644
index 1aad261a1..000000000
--- a/src/reclaim/reclaim_credential.c
+++ /dev/null
@@ -1,1004 +0,0 @@
-/*
-   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 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 reclaim/reclaim_credential.c
- * @brief helper library to manage identity attribute credentials
- * @author Martin Schanzenbach
- */
-#include "platform.h"
-#include "gnunet_util_lib.h"
-#include "gnunet_reclaim_plugin.h"
-#include "reclaim_credential.h"
-
-
-/**
- * Handle for a plugin
- */
-struct Plugin
-{
-  /**
-   * Name of the plugin
-   */
-  char *library_name;
-
-  /**
-   * Plugin API
-   */
-  struct GNUNET_RECLAIM_CredentialPluginFunctions *api;
-};
-
-
-/**
- * Plugins
- */
-static struct Plugin **credential_plugins;
-
-
-/**
- * Number of plugins
- */
-static unsigned int num_plugins;
-
-
-/**
- * Init canary
- */
-static int initialized;
-
-
-/**
- * Add a plugin
- *
- * @param cls closure
- * @param library_name name of the API library
- * @param lib_ret the plugin API pointer
- */
-static void
-add_plugin (void *cls, const char *library_name, void *lib_ret)
-{
-  struct GNUNET_RECLAIM_CredentialPluginFunctions *api = lib_ret;
-  struct Plugin *plugin;
-
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-              "Loading credential plugin `%s'\n",
-              library_name);
-  plugin = GNUNET_new (struct Plugin);
-  plugin->api = api;
-  plugin->library_name = GNUNET_strdup (library_name);
-  GNUNET_array_append (credential_plugins, num_plugins, plugin);
-}
-
-
-/**
- * Load plugins
- */
-static void
-init ()
-{
-  if (GNUNET_YES == initialized)
-    return;
-  initialized = GNUNET_YES;
-  GNUNET_PLUGIN_load_all_in_context (GNUNET_OS_project_data_default (),
-                                     "libgnunet_plugin_reclaim_credential_",
-                                     NULL,
-                                     &add_plugin,
-                                     NULL);
-}
-
-
-/**
- * Dual function to #init().
- */
-void __attribute__ ((destructor))
-RECLAIM_CREDENTIAL_fini ()
-{
-  struct Plugin *plugin;
-  const struct GNUNET_OS_ProjectData *pd = GNUNET_OS_project_data_get ();
-  const struct GNUNET_OS_ProjectData *dpd = GNUNET_OS_project_data_default ();
-
-  if (pd != dpd)
-    GNUNET_OS_init (dpd);
-
-  for (unsigned int i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    GNUNET_break (NULL ==
-                  GNUNET_PLUGIN_unload (plugin->library_name,
-                                        plugin->api));
-    GNUNET_free (plugin->library_name);
-    GNUNET_free (plugin);
-  }
-  GNUNET_free (credential_plugins);
-
-  if (pd != dpd)
-    GNUNET_OS_init (pd);
-
-  credential_plugins = NULL;
-}
-
-
-/**
- * Convert an credential type name to the corresponding number
- *
- * @param typename name to convert
- * @return corresponding number, UINT32_MAX on error
- */
-uint32_t
-GNUNET_RECLAIM_credential_typename_to_number (const char *typename)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  uint32_t ret;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (UINT32_MAX !=
-        (ret = plugin->api->typename_to_number (plugin->api->cls,
-                                                typename)))
-      return ret;
-  }
-  return UINT32_MAX;
-}
-
-
-/**
- * Convert an credential type number to the corresponding credential type string
- *
- * @param type number of a type
- * @return corresponding typestring, NULL on error
- */
-const char *
-GNUNET_RECLAIM_credential_number_to_typename (uint32_t type)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  const char *ret;
-
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL !=
-        (ret = plugin->api->number_to_typename (plugin->api->cls, type)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-/**
- * Convert human-readable version of a 'claim' of an credential 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_RECLAIM_credential_string_to_value (uint32_t type,
-                                           const char *s,
-                                           void **data,
-                                           size_t *data_size)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (GNUNET_OK == plugin->api->string_to_value (plugin->api->cls,
-                                                   type,
-                                                   s,
-                                                   data,
-                                                   data_size))
-      return GNUNET_OK;
-  }
-  return GNUNET_SYSERR;
-}
-
-
-/**
- * Convert the 'claim' of an credential to a string
- *
- * @param type the type of credential
- * @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_RECLAIM_credential_value_to_string (uint32_t type,
-                                           const void *data,
-                                           size_t data_size)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  char *ret;
-
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL != (ret = plugin->api->value_to_string (plugin->api->cls,
-                                                     type,
-                                                     data,
-                                                     data_size)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-struct GNUNET_RECLAIM_Credential *
-GNUNET_RECLAIM_credential_new (const char *attr_name,
-                               uint32_t type,
-                               const void *data,
-                               size_t data_size)
-{
-  struct GNUNET_RECLAIM_Credential *attr;
-  char *write_ptr;
-  char *attr_name_tmp = GNUNET_strdup (attr_name);
-
-  GNUNET_STRINGS_utf8_tolower (attr_name, attr_name_tmp);
-
-  attr = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Credential)
-                        + strlen (attr_name_tmp) + 1 + data_size);
-  attr->type = type;
-  attr->data_size = data_size;
-  attr->flag = 0;
-  write_ptr = (char *) &attr[1];
-  GNUNET_memcpy (write_ptr, attr_name_tmp, strlen (attr_name_tmp) + 1);
-  attr->name = write_ptr;
-  write_ptr += strlen (attr->name) + 1;
-  GNUNET_memcpy (write_ptr, data, data_size);
-  attr->data = write_ptr;
-  GNUNET_free (attr_name_tmp);
-  return attr;
-}
-
-
-/**
- * Get required size for serialization buffer
- *
- * @param attrs the attribute list to serialize
- * @return the required buffer size
- */
-size_t
-GNUNET_RECLAIM_credential_list_serialize_get_size (
-  const struct GNUNET_RECLAIM_CredentialList *credentials)
-{
-  struct GNUNET_RECLAIM_CredentialListEntry *le;
-  size_t len = 0;
-
-  for (le = credentials->list_head; NULL != le; le = le->next)
-  {
-    GNUNET_assert (NULL != le->credential);
-    len += GNUNET_RECLAIM_credential_serialize_get_size (le->credential);
-    len += sizeof(struct GNUNET_RECLAIM_CredentialListEntry);
-  }
-  return len;
-}
-
-
-size_t
-GNUNET_RECLAIM_credential_list_serialize (
-  const struct GNUNET_RECLAIM_CredentialList *credentials,
-  char *result)
-{
-  struct GNUNET_RECLAIM_CredentialListEntry *le;
-  size_t len;
-  size_t total_len;
-  char *write_ptr;
-  write_ptr = result;
-  total_len = 0;
-  for (le = credentials->list_head; NULL != le; le = le->next)
-  {
-    GNUNET_assert (NULL != le->credential);
-    len = GNUNET_RECLAIM_credential_serialize (le->credential, write_ptr);
-    total_len += len;
-    write_ptr += len;
-  }
-  return total_len;
-}
-
-
-struct GNUNET_RECLAIM_CredentialList *
-GNUNET_RECLAIM_credential_list_deserialize (const char *data, size_t data_size)
-{
-  struct GNUNET_RECLAIM_CredentialList *al;
-  struct GNUNET_RECLAIM_CredentialListEntry *ale;
-  size_t att_len;
-  const char *read_ptr;
-
-  al = GNUNET_new (struct GNUNET_RECLAIM_CredentialList);
-
-  if ((data_size < sizeof(struct
-                          Credential)
-       + sizeof(struct GNUNET_RECLAIM_CredentialListEntry)))
-    return al;
-
-  read_ptr = data;
-  while (((data + data_size) - read_ptr) >= sizeof(struct Credential))
-  {
-    ale = GNUNET_new (struct GNUNET_RECLAIM_CredentialListEntry);
-    ale->credential =
-      GNUNET_RECLAIM_credential_deserialize (read_ptr,
-                                             data_size - (read_ptr - data));
-    if (NULL == ale->credential)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                  "Failed to deserialize malformed credential.\n");
-      GNUNET_free (ale);
-      return al;
-    }
-    GNUNET_CONTAINER_DLL_insert (al->list_head, al->list_tail, ale);
-    att_len = GNUNET_RECLAIM_credential_serialize_get_size (ale->credential);
-    read_ptr += att_len;
-  }
-  return al;
-}
-
-
-/**
- * Make a (deep) copy of the credential list
- * @param attrs claim list to copy
- * @return copied claim list
- */
-struct GNUNET_RECLAIM_CredentialList *
-GNUNET_RECLAIM_credential_list_dup (
-  const struct GNUNET_RECLAIM_CredentialList *al)
-{
-  struct GNUNET_RECLAIM_CredentialListEntry *ale;
-  struct GNUNET_RECLAIM_CredentialListEntry *result_ale;
-  struct GNUNET_RECLAIM_CredentialList *result;
-
-  result = GNUNET_new (struct GNUNET_RECLAIM_CredentialList);
-  for (ale = al->list_head; NULL != ale; ale = ale->next)
-  {
-    result_ale = GNUNET_new (struct GNUNET_RECLAIM_CredentialListEntry);
-    GNUNET_assert (NULL != ale->credential);
-    result_ale->credential =
-      GNUNET_RECLAIM_credential_new (ale->credential->name,
-                                     ale->credential->type,
-                                     ale->credential->data,
-                                     ale->credential->data_size);
-    result_ale->credential->id = ale->credential->id;
-    GNUNET_CONTAINER_DLL_insert (result->list_head,
-                                 result->list_tail,
-                                 result_ale);
-  }
-  return result;
-}
-
-
-void
-GNUNET_RECLAIM_credential_list_destroy (
-  struct GNUNET_RECLAIM_CredentialList *credentials)
-{
-  struct GNUNET_RECLAIM_CredentialListEntry *ale;
-  struct GNUNET_RECLAIM_CredentialListEntry *tmp_ale;
-
-  for (ale = credentials->list_head; NULL != ale;)
-  {
-    if (NULL != ale->credential)
-      GNUNET_free (ale->credential);
-    tmp_ale = ale;
-    ale = ale->next;
-    GNUNET_free (tmp_ale);
-  }
-  GNUNET_free (credentials);
-}
-
-
-/**
- * Get required size for serialization buffer
- *
- * @param attr the credential to serialize
- * @return the required buffer size
- */
-size_t
-GNUNET_RECLAIM_credential_serialize_get_size (
-  const struct GNUNET_RECLAIM_Credential *credential)
-{
-  return sizeof(struct Credential) + strlen (credential->name)
-         + credential->data_size;
-}
-
-
-size_t
-GNUNET_RECLAIM_credential_serialize (
-  const struct GNUNET_RECLAIM_Credential *credential,
-  char *result)
-{
-  size_t data_len_ser;
-  size_t name_len;
-  struct Credential *atts;
-  char *write_ptr;
-
-  atts = (struct Credential *) result;
-  atts->credential_type = htonl (credential->type);
-  atts->credential_flag = htonl (credential->flag);
-  atts->credential_id = credential->id;
-  name_len = strlen (credential->name);
-  atts->name_len = htons (name_len);
-  write_ptr = (char *) &atts[1];
-  GNUNET_memcpy (write_ptr, credential->name, name_len);
-  write_ptr += name_len;
-  // TODO plugin-ize
-  // data_len_ser = plugin->serialize_attribute_value (attr,
-  //                                                  &attr_ser[1]);
-  data_len_ser = credential->data_size;
-  GNUNET_memcpy (write_ptr, credential->data, credential->data_size);
-  atts->data_size = htons (data_len_ser);
-
-  return sizeof(struct Credential) + strlen (credential->name)
-         + credential->data_size;
-}
-
-
-/**
- * Deserialize an credential
- *
- * @param data the serialized credential
- * @param data_size the length of the serialized data
- *
- * @return a GNUNET_IDENTITY_PROVIDER_Attribute, must be free'd by caller
- */
-struct GNUNET_RECLAIM_Credential *
-GNUNET_RECLAIM_credential_deserialize (const char *data, size_t data_size)
-{
-  struct GNUNET_RECLAIM_Credential *credential;
-  struct Credential *atts;
-  size_t data_len;
-  size_t name_len;
-  char *write_ptr;
-
-  if (data_size < sizeof(struct Credential))
-    return NULL;
-
-  atts = (struct Credential *) data;
-  data_len = ntohs (atts->data_size);
-  name_len = ntohs (atts->name_len);
-  if (data_size < sizeof(struct Credential) + data_len + name_len)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Buffer too small to deserialize\n");
-    return NULL;
-  }
-  credential = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Credential)
-                              + data_len + name_len + 1);
-  credential->type = ntohl (atts->credential_type);
-  credential->flag = ntohl (atts->credential_flag);
-  credential->id = atts->credential_id;
-  credential->data_size = data_len;
-
-  write_ptr = (char *) &credential[1];
-  GNUNET_memcpy (write_ptr, &atts[1], name_len);
-  write_ptr[name_len] = '\0';
-  credential->name = write_ptr;
-
-  write_ptr += name_len + 1;
-  GNUNET_memcpy (write_ptr, (char *) &atts[1] + name_len,
-                 credential->data_size);
-  credential->data = write_ptr;
-  return credential;
-}
-
-
-struct GNUNET_RECLAIM_AttributeList*
-GNUNET_RECLAIM_credential_get_attributes (const struct
-                                          GNUNET_RECLAIM_Credential *credential)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  struct GNUNET_RECLAIM_AttributeList *ret;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL !=
-        (ret = plugin->api->get_attributes (plugin->api->cls,
-                                            credential)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-char*
-GNUNET_RECLAIM_credential_get_issuer (const struct
-                                      GNUNET_RECLAIM_Credential *credential)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  char *ret;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL !=
-        (ret = plugin->api->get_issuer (plugin->api->cls,
-                                        credential)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-int
-GNUNET_RECLAIM_credential_get_expiration (const struct
-                                          GNUNET_RECLAIM_Credential *credential,
-                                          struct GNUNET_TIME_Absolute*exp)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (GNUNET_OK !=  plugin->api->get_expiration (plugin->api->cls,
-                                                   credential,
-                                                   exp))
-      continue;
-    return GNUNET_OK;
-  }
-  return GNUNET_SYSERR;
-}
-
-
-/**
- * Convert an presentation type name to the corresponding number
- *
- * @param typename name to convert
- * @return corresponding number, UINT32_MAX on error
- */
-uint32_t
-GNUNET_RECLAIM_presentation_typename_to_number (const char *typename)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  uint32_t ret;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (UINT32_MAX !=
-        (ret = plugin->api->typename_to_number_p (plugin->api->cls,
-                                                  typename)))
-      return ret;
-  }
-  return UINT32_MAX;
-}
-
-
-const char *
-GNUNET_RECLAIM_presentation_number_to_typename (uint32_t type)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  const char *ret;
-
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL !=
-        (ret = plugin->api->number_to_typename_p (plugin->api->cls, type)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-/**
- * Convert human-readable version of a 'claim' of an presentation 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_RECLAIM_presentation_string_to_value (uint32_t type,
-                                             const char *s,
-                                             void **data,
-                                             size_t *data_size)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (GNUNET_OK == plugin->api->string_to_value_p (plugin->api->cls,
-                                                     type,
-                                                     s,
-                                                     data,
-                                                     data_size))
-      return GNUNET_OK;
-  }
-  return GNUNET_SYSERR;
-}
-
-
-/**
- * Convert the 'claim' of an presentation to a string
- *
- * @param type the type of presentation
- * @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_RECLAIM_presentation_value_to_string (uint32_t type,
-                                             const void *data,
-                                             size_t data_size)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  char *ret;
-
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL != (ret = plugin->api->value_to_string_p (plugin->api->cls,
-                                                       type,
-                                                       data,
-                                                       data_size)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-struct GNUNET_RECLAIM_Presentation *
-GNUNET_RECLAIM_presentation_new (uint32_t type,
-                                 const void *data,
-                                 size_t data_size)
-{
-  struct GNUNET_RECLAIM_Presentation *attr;
-  char *write_ptr;
-
-  attr = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Presentation)
-                        + data_size);
-  attr->type = type;
-  attr->data_size = data_size;
-  write_ptr = (char *) &attr[1];
-  GNUNET_memcpy (write_ptr, data, data_size);
-  attr->data = write_ptr;
-  return attr;
-}
-
-
-/**
- * Get required size for serialization buffer
- *
- * @param attrs the attribute list to serialize
- * @return the required buffer size
- */
-size_t
-GNUNET_RECLAIM_presentation_list_serialize_get_size (
-  const struct GNUNET_RECLAIM_PresentationList *presentations)
-{
-  struct GNUNET_RECLAIM_PresentationListEntry *le;
-  size_t len = 0;
-
-  for (le = presentations->list_head; NULL != le; le = le->next)
-  {
-    GNUNET_assert (NULL != le->presentation);
-    len += GNUNET_RECLAIM_presentation_serialize_get_size (le->presentation);
-  }
-  return len;
-}
-
-
-size_t
-GNUNET_RECLAIM_presentation_list_serialize (
-  const struct GNUNET_RECLAIM_PresentationList *presentations,
-  char *result)
-{
-  struct GNUNET_RECLAIM_PresentationListEntry *le;
-  size_t len;
-  size_t total_len;
-  char *write_ptr;
-  write_ptr = result;
-  total_len = 0;
-  for (le = presentations->list_head; NULL != le; le = le->next)
-  {
-    GNUNET_assert (NULL != le->presentation);
-    len = GNUNET_RECLAIM_presentation_serialize (le->presentation, write_ptr);
-    total_len += len;
-    write_ptr += len;
-  }
-  return total_len;
-}
-
-
-/**
- * Deserialize an presentation 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_RECLAIM_PresentationList *
-GNUNET_RECLAIM_presentation_list_deserialize (const char *data, size_t
-                                              data_size)
-{
-  struct GNUNET_RECLAIM_PresentationList *al;
-  struct GNUNET_RECLAIM_PresentationListEntry *ale;
-  size_t att_len;
-  const char *read_ptr;
-
-  al = GNUNET_new (struct GNUNET_RECLAIM_PresentationList);
-
-  if (data_size < sizeof(struct Presentation))
-    return al;
-
-  read_ptr = data;
-  while (((data + data_size) - read_ptr) >= sizeof(struct Presentation))
-  {
-    ale = GNUNET_new (struct GNUNET_RECLAIM_PresentationListEntry);
-    ale->presentation =
-      GNUNET_RECLAIM_presentation_deserialize (read_ptr,
-                                               data_size - (read_ptr - data));
-    if (NULL == ale->presentation)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                  "Failed to deserialize malformed presentation.\n");
-      GNUNET_free (ale);
-      return al;
-    }
-    GNUNET_CONTAINER_DLL_insert (al->list_head, al->list_tail, ale);
-    att_len = GNUNET_RECLAIM_presentation_serialize_get_size (
-      ale->presentation);
-    read_ptr += att_len;
-  }
-  return al;
-}
-
-
-/**
- * Make a (deep) copy of the presentation list
- * @param attrs claim list to copy
- * @return copied claim list
- */
-struct GNUNET_RECLAIM_PresentationList *
-GNUNET_RECLAIM_presentation_list_dup (
-  const struct GNUNET_RECLAIM_PresentationList *al)
-{
-  struct GNUNET_RECLAIM_PresentationListEntry *ale;
-  struct GNUNET_RECLAIM_PresentationListEntry *result_ale;
-  struct GNUNET_RECLAIM_PresentationList *result;
-
-  result = GNUNET_new (struct GNUNET_RECLAIM_PresentationList);
-  for (ale = al->list_head; NULL != ale; ale = ale->next)
-  {
-    result_ale = GNUNET_new (struct GNUNET_RECLAIM_PresentationListEntry);
-    GNUNET_assert (NULL != ale->presentation);
-    result_ale->presentation =
-      GNUNET_RECLAIM_presentation_new (ale->presentation->type,
-                                       ale->presentation->data,
-                                       ale->presentation->data_size);
-    result_ale->presentation->credential_id = ale->presentation->credential_id;
-    GNUNET_CONTAINER_DLL_insert (result->list_head,
-                                 result->list_tail,
-                                 result_ale);
-  }
-  return result;
-}
-
-
-void
-GNUNET_RECLAIM_presentation_list_destroy (
-  struct GNUNET_RECLAIM_PresentationList *presentations)
-{
-  struct GNUNET_RECLAIM_PresentationListEntry *ale;
-  struct GNUNET_RECLAIM_PresentationListEntry *tmp_ale;
-
-  for (ale = presentations->list_head; NULL != ale;)
-  {
-    if (NULL != ale->presentation)
-      GNUNET_free (ale->presentation);
-    tmp_ale = ale;
-    ale = ale->next;
-    GNUNET_free (tmp_ale);
-  }
-  GNUNET_free (presentations);
-}
-
-
-/**
- * Get required size for serialization buffer
- *
- * @param attr the presentation to serialize
- * @return the required buffer size
- */
-size_t
-GNUNET_RECLAIM_presentation_serialize_get_size (
-  const struct GNUNET_RECLAIM_Presentation *presentation)
-{
-  return sizeof(struct Presentation) + presentation->data_size;
-}
-
-
-size_t
-GNUNET_RECLAIM_presentation_serialize (
-  const struct GNUNET_RECLAIM_Presentation *presentation,
-  char *result)
-{
-  struct Presentation *atts;
-  char *write_ptr;
-
-  atts = (struct Presentation *) result;
-  atts->presentation_type = htonl (presentation->type);
-  atts->credential_id = presentation->credential_id;
-  write_ptr = (char *) &atts[1];
-  GNUNET_memcpy (write_ptr, presentation->data, presentation->data_size);
-  atts->data_size = htons (presentation->data_size);
-
-  return sizeof(struct Presentation) + presentation->data_size;
-}
-
-
-/**
- * Deserialize an presentation
- *
- * @param data the serialized presentation
- * @param data_size the length of the serialized data
- *
- * @return a GNUNET_IDENTITY_PROVIDER_Attribute, must be free'd by caller
- */
-struct GNUNET_RECLAIM_Presentation *
-GNUNET_RECLAIM_presentation_deserialize (const char *data, size_t data_size)
-{
-  struct GNUNET_RECLAIM_Presentation *presentation;
-  struct Presentation *atts;
-  size_t data_len;
-  char *write_ptr;
-
-  if (data_size < sizeof(struct Presentation))
-    return NULL;
-
-  atts = (struct Presentation *) data;
-  data_len = ntohs (atts->data_size);
-  if (data_size < sizeof(struct Presentation) + data_len)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Buffer too small to deserialize\n");
-    return NULL;
-  }
-  presentation = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Presentation)
-                                + data_len);
-  presentation->type = ntohl (atts->presentation_type);
-  presentation->credential_id = atts->credential_id;
-  presentation->data_size = data_len;
-
-  write_ptr = (char *) &presentation[1];
-  GNUNET_memcpy (write_ptr, &atts[1], data_len);
-  presentation->data = write_ptr;
-  return presentation;
-}
-
-
-struct GNUNET_RECLAIM_AttributeList*
-GNUNET_RECLAIM_presentation_get_attributes (const struct
-                                            GNUNET_RECLAIM_Presentation *
-                                            presentation)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  struct GNUNET_RECLAIM_AttributeList *ret;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL !=
-        (ret = plugin->api->get_attributes_p (plugin->api->cls,
-                                              presentation)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-char*
-GNUNET_RECLAIM_presentation_get_issuer (const struct
-                                        GNUNET_RECLAIM_Presentation *
-                                        presentation)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  char *ret;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (NULL !=
-        (ret = plugin->api->get_issuer_p (plugin->api->cls,
-                                          presentation)))
-      return ret;
-  }
-  return NULL;
-}
-
-
-int
-GNUNET_RECLAIM_presentation_get_expiration (const struct
-                                            GNUNET_RECLAIM_Presentation *
-                                            presentation,
-                                            struct GNUNET_TIME_Absolute*exp)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (GNUNET_OK !=  plugin->api->get_expiration_p (plugin->api->cls,
-                                                     presentation,
-                                                     exp))
-      continue;
-    return GNUNET_OK;
-  }
-  return GNUNET_SYSERR;
-}
-
-
-/**
- * Create a presentation from a credential and a lift of (selected)
- * attributes in the credential.
- *
- * @param cred the credential to use
- * @param attrs the attributes to present from the credential
- * @return the credential presentation presenting the attributes according
- *         to the presentation mechanism of the credential
- *         or NULL on error.
- */
-int
-GNUNET_RECLAIM_credential_get_presentation (
-  const struct GNUNET_RECLAIM_Credential *cred,
-  const struct GNUNET_RECLAIM_AttributeList *attrs,
-  struct GNUNET_RECLAIM_Presentation **presentation)
-{
-  unsigned int i;
-  struct Plugin *plugin;
-  init ();
-  for (i = 0; i < num_plugins; i++)
-  {
-    plugin = credential_plugins[i];
-    if (GNUNET_OK !=  plugin->api->create_presentation (plugin->api->cls,
-                                                        cred,
-                                                        attrs,
-                                                        presentation))
-      continue;
-    (*presentation)->credential_id = cred->id;
-    return GNUNET_OK;
-  }
-  return GNUNET_SYSERR;
-}