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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_ACCOUNT_HH_
#define OLM_ACCOUNT_HH_
#include "olm/list.hh"
#include "olm/crypto.h"
#include "olm/error.h"
#include <cstdint>
namespace olm {
struct IdentityKeys {
_olm_ed25519_key_pair ed25519_key;
_olm_curve25519_key_pair curve25519_key;
};
struct OneTimeKey {
std::uint32_t id;
bool published;
_olm_curve25519_key_pair key;
};
static std::size_t const MAX_ONE_TIME_KEYS = 100;
struct Account {
Account();
IdentityKeys identity_keys;
List<OneTimeKey, MAX_ONE_TIME_KEYS> one_time_keys;
OneTimeKey current_fallback_key;
OneTimeKey prev_fallback_key;
std::uint32_t next_one_time_key_id;
OlmErrorCode last_error;
/** Number of random bytes needed to create a new account */
std::size_t new_account_random_length();
/** Create a new account. Returns std::size_t(-1) on error. If the number of
* random bytes is too small then last_error will be NOT_ENOUGH_RANDOM */
std::size_t new_account(
uint8_t const * random, std::size_t random_length
);
/** Number of bytes needed to output the identity keys for this account */
std::size_t get_identity_json_length();
/** Output the identity keys for this account as JSON in the following
* format:
*
* {"curve25519":"<43 base64 characters>"
* ,"ed25519":"<43 base64 characters>"
* }
*
*
* Returns the size of the JSON written or std::size_t(-1) on error.
* If the buffer is too small last_error will be OUTPUT_BUFFER_TOO_SMALL. */
std::size_t get_identity_json(
std::uint8_t * identity_json, std::size_t identity_json_length
);
/**
* The length of an ed25519 signature in bytes.
*/
std::size_t signature_length();
/**
* Signs a message with the ed25519 key for this account.
*/
std::size_t sign(
std::uint8_t const * message, std::size_t message_length,
std::uint8_t * signature, std::size_t signature_length
);
/** Number of bytes needed to output the one time keys for this account */
std::size_t get_one_time_keys_json_length();
/** Output the one time keys that haven't been published yet as JSON:
*
* {"curve25519":
* ["<6 byte key id>":"<43 base64 characters>"
* ,"<6 byte key id>":"<43 base64 characters>"
* ...
* ]
* }
*
* Returns the size of the JSON written or std::size_t(-1) on error.
* If the buffer is too small last_error will be OUTPUT_BUFFER_TOO_SMALL.
*/
std::size_t get_one_time_keys_json(
std::uint8_t * one_time_json, std::size_t one_time_json_length
);
/** Mark the current list of one_time_keys as being published. They
* will no longer be returned by get_one_time_keys_json_length(). */
std::size_t mark_keys_as_published();
/** The largest number of one time keys this account can store. */
std::size_t max_number_of_one_time_keys();
/** The number of random bytes needed to generate a given number of new one
* time keys. */
std::size_t generate_one_time_keys_random_length(
std::size_t number_of_keys
);
/** Generates a number of new one time keys. If the total number of keys
* stored by this account exceeds max_number_of_one_time_keys() then the
* old keys are discarded. Returns std::size_t(-1) on error. If the number
* of random bytes is too small then last_error will be NOT_ENOUGH_RANDOM */
std::size_t generate_one_time_keys(
std::size_t number_of_keys,
std::uint8_t const * random, std::size_t random_length
);
/** The number of random bytes needed to generate a fallback key. */
std::size_t generate_fallback_key_random_length();
/** Generates a new fallback key. Returns std::size_t(-1) on error. If the
* number of random bytes is too small then last_error will be
* NOT_ENOUGH_RANDOM */
std::size_t generate_fallback_key(
std::uint8_t const * random, std::size_t random_length
);
/** Number of bytes needed to output the one time keys for this account */
std::size_t get_fallback_key_json_length();
/** Output the fallback key as JSON:
*
* {"curve25519":
* ["<6 byte key id>":"<43 base64 characters>"
* ,"<6 byte key id>":"<43 base64 characters>"
* ...
* ]
* }
*
* Returns the size of the JSON written or std::size_t(-1) on error.
* If the buffer is too small last_error will be OUTPUT_BUFFER_TOO_SMALL.
*/
std::size_t get_fallback_key_json(
std::uint8_t * fallback_json, std::size_t fallback_json_length
);
/** Lookup a one time key with the given public key */
OneTimeKey const * lookup_key(
_olm_curve25519_public_key const & public_key
);
/** Remove a one time key with the given public key */
std::size_t remove_key(
_olm_curve25519_public_key const & public_key
);
};
std::size_t pickle_length(
Account const & value
);
std::uint8_t * pickle(
std::uint8_t * pos,
Account const & value
);
std::uint8_t const * unpickle(
std::uint8_t const * pos, std::uint8_t const * end,
Account & value
);
} // namespace olm
#endif /* OLM_ACCOUNT_HH_ */
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