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% 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.
-module(aegis_example_key_manager).
-behaviour(aegis_key_manager).
-export([
init/0,
generate_key/3,
unwrap_key/3
]).
init() ->
<<1:256>>.
generate_key(RootKey, #{} = _Db, _Options) ->
DbKey = crypto:strong_rand_bytes(32),
WrappedKey = aegis_keywrap:key_wrap(RootKey, DbKey),
%% just an example of how to represent the arbitrary options
AegisConfig = {<<"wrapped_key">>, WrappedKey},
{ok, DbKey, AegisConfig}.
unwrap_key(RootKey, #{} = _Db, AegisConfig) ->
{<<"wrapped_key">>, WrappedKey} = AegisConfig,
case aegis_keywrap:key_unwrap(RootKey, WrappedKey) of
fail ->
error(unwrap_failed);
DbKey ->
{ok, DbKey, AegisConfig}
end.
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