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/* Copyright 2015 OpenMarket Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef OLM_SESSION_HH_
#define OLM_SESSION_HH_
#include "olm/ratchet.hh"
namespace olm {
class Account;
struct RemoteKey {
std::uint32_t id;
Curve25519PublicKey key;
};
enum struct MessageType {
PRE_KEY = 0,
MESSAGE = 1,
};
struct Session {
Session();
Ratchet ratchet;
ErrorCode last_error;
bool received_message;
RemoteKey alice_identity_key;
Curve25519PublicKey alice_base_key;
std::uint32_t bob_one_time_key_id;
std::size_t new_outbound_session_random_length();
std::size_t new_outbound_session(
Account const & local_account,
Curve25519PublicKey const & identity_key,
RemoteKey const & one_time_key,
std::uint8_t const * random, std::size_t random_length
);
std::size_t new_inbound_session(
Account & local_account,
std::uint8_t const * one_time_key_message, std::size_t message_length
);
bool matches_inbound_session(
std::uint8_t const * one_time_key_message, std::size_t message_length
);
MessageType encrypt_message_type();
std::size_t encrypt_message_length(
std::size_t plaintext_length
);
std::size_t encrypt_random_length();
std::size_t encrypt(
std::uint8_t const * plaintext, std::size_t plaintext_length,
std::uint8_t const * random, std::size_t random_length,
std::uint8_t * message, std::size_t message_length
);
std::size_t decrypt_max_plaintext_length(
MessageType message_type,
std::uint8_t const * message, std::size_t message_length
);
std::size_t decrypt(
MessageType message_type,
std::uint8_t const * message, std::size_t message_length,
std::uint8_t * plaintext, std::size_t max_plaintext_length
);
};
std::size_t pickle_length(
Session const & value
);
std::uint8_t * pickle(
std::uint8_t * pos,
Session const & value
);
std::uint8_t const * unpickle(
std::uint8_t const * pos, std::uint8_t const * end,
Session & value
);
} // namespace olm
#endif /* OLM_SESSION_HH_ */
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