/*
  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.h
 * @brief Handle /keys requests and manage key state
 * @author Florian Dold
 * @author Benedikt Mueller
 * @author Christian Grothoff
 */
#ifndef TALER_MINT_HTTPD_KEYS_H
#define TALER_MINT_HTTPD_KEYS_H

#include <gnunet/gnunet_util_lib.h>
#include <microhttpd.h>
#include <jansson.h>
#include "taler-mint-httpd.h"
#include "mint.h"
#include "key_io.h"
#include "taler-mint-httpd_keystate.h"


/**
 * Check if a coin is valid; that is, whether the denomination key exists,
 * is not expired, and the signature is correct.
 *
 * @param key_state the key state to use for checking the coin's validity
 * @param coin_public_info the coin public info to check for validity
 * @return #GNUNET_YES if the coin is valid,
 *         #GNUNET_NO if it is invalid
 *         #GNUNET_SYSERROR if an internal error occured
 */
int
TALER_MINT_test_coin_valid (const struct MintKeyState *key_state,
                            const struct TALER_CoinPublicInfo *coin_public_info);


/**
 * 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);



/**
 * Handle a "/keys" request
 *
 * @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);



#endif