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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2004-2022. All Rights Reserved.
%%
%% 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.
%%
%% %CopyrightEnd%
%%
%%
-module(crypto_prop_generators).
-export([text_plain/0,
cipher/0,
key/1,
iv/1,
iolist/0,
mybinary/1,
padding/0,
non_aead_ciphers/0,
block_size/1,
key_length/1,
iv_length/1
]).
-include_lib("common_test/include/ct_property_test.hrl").
%%%================================================================
%%% Generators
text_plain() -> iolist().
cipher() -> oneof(non_aead_ciphers()).
key(Cipher) ->
%% Can't be shrunk
crypto:strong_rand_bytes( key_length(Cipher) ).
iv(Cipher) ->
%% Can't be shrunk
crypto:strong_rand_bytes( iv_length(Cipher) ).
iolist() -> frequency([{5, list( oneof([list(byte()),
binary(),
list(binary())]))},
{1, mybinary(50000)}
]).
mybinary(MaxSize) -> ?LET(Sz, integer(0,MaxSize), binary(Sz)).
padding() -> oneof([pkcs_padding, none,
zero, random,
undefined]).
%%%================================================================
non_aead_ciphers() ->
[C || C <- crypto:supports(ciphers),
C =/= chacha20_poly1305,
begin
#{mode := Mode} = crypto:cipher_info(C),
not lists:member(Mode, [ccm_mode, gcm_mode])
end].
block_size(Cipher) -> maps:get(block_size, crypto:cipher_info(Cipher)).
key_length(Cipher) -> maps:get(key_length, crypto:cipher_info(Cipher)).
iv_length(Cipher) -> maps:get(iv_length, crypto:cipher_info(Cipher)).
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