messenger_api_message.h

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/*
   This file is part of GNUnet.
   Copyright (C) 2020 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
 */
#ifndef GNUNET_MESSENGER_API_MESSAGE_H
#define GNUNET_MESSENGER_API_MESSAGE_H

#include "platform.h"
#include "gnunet_crypto_lib.h"
#include "gnunet_identity_service.h"
#include "gnunet_mq_lib.h"
#include "gnunet_signatures.h"

#include "gnunet_messenger_service.h"

#include "messenger_api_ego.h"

struct GNUNET_MESSENGER_Message*
create_message (enum GNUNET_MESSENGER_MessageKind kind);

struct GNUNET_MESSENGER_Message*
copy_message (const struct GNUNET_MESSENGER_Message *message);

void
destroy_message (struct GNUNET_MESSENGER_Message *message);

uint16_t
get_message_kind_size (enum GNUNET_MESSENGER_MessageKind kind);

uint16_t
get_message_size (const struct GNUNET_MESSENGER_Message *message);

void
encode_message (const struct GNUNET_MESSENGER_Message *message, uint16_t length, char *buffer);

int
decode_message (struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer);

void
hash_message (uint16_t length, const char *buffer, struct GNUNET_HashCode *hash);

void
sign_message (struct GNUNET_MESSENGER_Message *message, uint16_t length, char *buffer,
              const struct GNUNET_HashCode *hash, const struct GNUNET_MESSENGER_Ego *ego);

int
verify_message (const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash,
                const struct GNUNET_IDENTITY_PublicKey *key);

int
encrypt_message (struct GNUNET_MESSENGER_Message *message, const struct GNUNET_IDENTITY_PublicKey *key);

int
decrypt_message (struct GNUNET_MESSENGER_Message *message, const struct GNUNET_IDENTITY_PrivateKey *key);

#define GNUNET_MESSENGER_PACK_MODE_ENVELOPE 0x1
#define GNUNET_MESSENGER_PACK_MODE_UNKNOWN 0x0

struct GNUNET_MQ_Envelope*
pack_message (struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash,
              const struct GNUNET_MESSENGER_Ego *ego, int mode);

#endif //GNUNET_MESSENGER_API_MESSAGE_H