/*
  This file is part of TALER
  (C) 2014 GNUnet e.V.

  TALER 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, or (at your option) any later version.

  TALER 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
  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
*/
/**
 * @file taler-mint-httpd_keys.c
 * @brief Handle /keys requests
 * @author Florian Dold
 * @author Benedikt Mueller
 * @author Christian Grothoff
 */
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include "mint.h"
#include "taler-mint-httpd_keys.h"
#include "taler-mint-httpd_keystate.h"


/**
 * Function to call to handle the request by sending
 * back static data from the @a rh.
 *
 * @param rh context of the handler
 * @param connection the MHD connection to handle
 * @param[IN|OUT] connection_cls the connection's closure (can be updated)
 * @param upload_data upload data
 * @param[IN|OUT] upload_data_size number of bytes (left) in @a upload_data
 * @return MHD result code
 */
int
TALER_MINT_handler_keys (struct RequestHandler *rh,
                         struct MHD_Connection *connection,
                         void **connection_cls,
                         const char *upload_data,
                         size_t *upload_data_size)
{
  struct MintKeyState *key_state;
  struct MHD_Response *response;
  int ret;

  key_state = TALER_MINT_key_state_acquire ();
  response = MHD_create_response_from_buffer (strlen (key_state->keys_json),
                                              key_state->keys_json,
                                              MHD_RESPMEM_MUST_COPY);
  TALER_MINT_key_state_release (key_state);
  if (NULL == response)
  {
    GNUNET_break (0);
    return MHD_NO;
  }
  (void) MHD_add_response_header (response,
                                  "Content-Type",
                                  rh->mime_type);
  ret = MHD_queue_response (connection,
                            rh->response_code,
                            response);
  MHD_destroy_response (response);
  return ret;
}




/**
 * Sign the message in @a purpose with the mint's signing
 * key.
 *
 * @param purpose the message to sign
 * @param[OUT] sig signature over purpose using current signing key
 */
void
TALER_MINT_keys_sign (const struct GNUNET_CRYPTO_EccSignaturePurpose *purpose,
                      struct GNUNET_CRYPTO_EddsaSignature *sig)

{
  struct MintKeyState *key_state;

  key_state = TALER_MINT_key_state_acquire ();
  GNUNET_assert (GNUNET_OK ==
                 GNUNET_CRYPTO_eddsa_sign (&key_state->current_sign_key_issue.signkey_priv,
                                           purpose,
                                           sig));

  TALER_MINT_key_state_release (key_state);
}


/* end of taler-mint-httpd_keys.c */