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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_ng_api).
-compile(export_all).
-include_lib("common_test/include/ct_property_test.hrl").
-include("crypto_prop_generators.hrl").
%%%================================================================
%%% Properties:
prop__crypto_one_time() ->
numtests(10000,
?FORALL({TextPlain, Cipher, Key, IV, Padding}, ?LET(Ciph,cipher(),
{text_plain(), Ciph, key(Ciph), iv(Ciph), padding()}),
begin
R = equal(TextPlain,
full_blocks(TextPlain, Cipher, Padding),
decrypt_encrypt_one_time(Cipher, Key, IV, TextPlain, Padding)),
prt_inf(Cipher, TextPlain, R)
end
)
).
prop__crypto_init_update_final() ->
numtests(10000,
?FORALL({TextPlain, Cipher, Key, IV, Padding}, ?LET(Ciph,cipher(),
{text_plain(), Ciph, key(Ciph), iv(Ciph), padding()}),
begin
R = equal(TextPlain,
full_blocks(TextPlain, Cipher, Padding),
decrypt_encrypt_init_update_final(Cipher, Key, IV, TextPlain, Padding)),
prt_inf(Cipher, TextPlain, R)
end
)
).
prt_inf(Cipher, TextPlain, R) ->
aggregate(ct_property_test:title("text lengths",
ct_property_test:print_frequency_ranges(),
fun ct:pal/2),
[iolist_size(TextPlain)],
aggregate(ct_property_test:title("ciphers",
ct_property_test:print_frequency(),
fun ct:pal/2),
[Cipher],
R)).
%%%================================================================
%%% Lib
equal(_, _, correct_exception) -> true;
equal(_, T, T) -> true;
equal(F, Tp, Td) ->
ct:pal("Full: ~p~n"
"Block: ~p~n"
"Decr: ~p~n",
[F, Tp, Td]),
false.
decrypt_encrypt_one_time(Cipher, Key, IV, TextPlain, Padding) ->
io:format("~p:~p Cipher: ~p, BlockSize: ~p, Key: ~p, IV: ~p, TextPlain: ~p (~p chunks), Padding: ~p",
[?MODULE,?LINE, Cipher, block_size(Cipher), size(Key), size(IV), size(iolist_to_binary(TextPlain)),
num_chunks(TextPlain), Padding]),
Sblock = block_size(Cipher),
ExcessBytesLastBlock = size(iolist_to_binary(TextPlain)) rem Sblock,
PadSize = if
(Padding == zero) ; (Padding == random) ->
(Sblock - ExcessBytesLastBlock) rem Sblock;
true ->
0
end,
try
crypto:crypto_one_time(Cipher, Key, IV, TextPlain, [{encrypt,true},{padding,Padding}])
of
TextCrypto ->
io:format("~p:~p PadSize: ~p, TextCrypto: ~p",
[?MODULE,?LINE, PadSize, size(TextCrypto)]),
TextDecryptPadded =
crypto:crypto_one_time(Cipher, Key, IV, TextCrypto, [{encrypt,false},{padding,Padding}]),
io:format("~p:~p TextDecryptPadded: ~p",
[?MODULE,?LINE, size(TextDecryptPadded)]),
element(1, split_binary(TextDecryptPadded, size(TextDecryptPadded) - PadSize))
catch
error:{error,{"api_ng.c",Line},Msg} when ExcessBytesLastBlock>0,
Padding == none ->
case Msg of
"Padding 'none' but unfilled last block"++_ ->
io:format("~p:~p Correct exception: ~p",
[?MODULE,?LINE, {error,{"api_ng.c",Line},Msg}]),
correct_exception;
_ ->
error({error,{"api_ng.c",Line},Msg})
end
end.
decrypt_encrypt_init_update_final(Cipher, Key, IV, TextPlain, Padding) when is_binary(TextPlain) ->
decrypt_encrypt_init_update_final(Cipher, Key, IV, [TextPlain], Padding);
decrypt_encrypt_init_update_final(Cipher, Key, IV, TextPlain, Padding) ->
io:format("~p:~p Cipher: ~p, BlockSize: ~p, Key: ~p, IV: ~p, TextPlain: ~p (~p chunks), Padding: ~p",
[?MODULE,?LINE, Cipher, block_size(Cipher), size(Key), size(IV), size(iolist_to_binary(TextPlain)),
num_chunks(TextPlain), Padding]),
Sblock = block_size(Cipher),
ExcessBytesLastBlock = size(iolist_to_binary(TextPlain)) rem Sblock,
Cenc = crypto:crypto_init(Cipher, Key, IV, [{encrypt,true},{padding,Padding}]),
TextOut = lists:foldl(fun(TextIn, TextOutAcc) ->
[crypto:crypto_update(Cenc,TextIn) | TextOutAcc]
end, [], TextPlain),
try
Rf = crypto:crypto_final(Cenc),
Rps = maps:get(padding_size,crypto:crypto_get_data(Cenc)),
{Rps,Rf}
of
{PadSize0,LastTextOut} ->
TextCrypto = lists:reverse([LastTextOut|TextOut]),
io:format("~p:~p PadSize0: ~p, TextCrypto: ~p",
[?MODULE,?LINE, PadSize0, size(iolist_to_binary(TextCrypto))]),
PadSize = case Padding of
pkcs_padding -> 0;
none -> 0;
undefined -> 0;
_ -> PadSize0
end,
Cdec = crypto:crypto_init(Cipher, Key, IV, [{encrypt,false},{padding,Padding}]),
TextDec = lists:foldl(fun(TextC, TextDecAcc) ->
[crypto:crypto_update(Cdec,TextC) | TextDecAcc]
end, [], TextCrypto),
LastDecOut = crypto:crypto_final(Cdec),
TextDecryptPadded = iolist_to_binary(lists:reverse([LastDecOut|TextDec])),
io:format("~p:~p TextDecryptPadded: ~p",
[?MODULE,?LINE, size(TextDecryptPadded)]),
element(1, split_binary(TextDecryptPadded, size(TextDecryptPadded) - PadSize))
catch
error:{error,{"api_ng.c",Line},Msg} when ExcessBytesLastBlock>0,
Padding == none ->
io:format("~p:~p Correct exception: ~p",
[?MODULE,?LINE, {error,{"api_ng.c",Line},Msg}]),
correct_exception
end.
full_blocks(TextPlain, Cipher, Pad) when Pad == undefined ; Pad == none ->
TextPlainBin = iolist_to_binary(TextPlain),
{Head,_Tail} = split_binary(TextPlainBin, (size(TextPlainBin) - num_rest_bytes(TextPlainBin,Cipher))),
Head;
full_blocks(TextPlain, _Cipher, _) ->
iolist_to_binary(TextPlain).
num_chunks(B) when is_binary(B) -> 1;
num_chunks(L) when is_list(L) -> length(L).
num_rest_bytes(Bin, Cipher) -> size(Bin) rem block_size(Cipher).
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