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Add in tests for beforenm/afternm to the EQC model.

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This commit is contained in:
Jesper Louis Andersen 2014-12-18 08:48:05 +01:00
parent 159e8f6750
commit 2a23a16ed3
1 changed files with 60 additions and 0 deletions
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60
eqc_test/enacl_eqc.erl
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@ -148,8 +148,12 @@ prop_box_correct() ->
begin
case v_iodata(Msg) andalso nonce_valid(Nonce) andalso keypair_valid(PK1, SK1) andalso keypair_valid(PK2, SK2) of
true ->
Key = enacl:box_beforenm(PK2, SK1),
Key = enacl:box_beforenm(PK1, SK2),
CipherText = enacl:box(Msg, Nonce, PK2, SK1),
CipherText = enacl:box_afternm(Msg, Nonce, Key),
{ok, DecodedMsg} = enacl:box_open(CipherText, Nonce, PK1, SK2),
{ok, DecodedMsg} = enacl:box_open_afternm(CipherText, Nonce, Key),
equals(iolist_to_binary(Msg), DecodedMsg);
false ->
case box(Msg, Nonce, PK2, SK1) of
@ -171,8 +175,10 @@ prop_box_failure_integrity() ->
andalso keypair_valid(PK1, SK1)
andalso keypair_valid(PK2, SK2) of
true ->
Key = enacl:box_beforenm(PK2, SK1),
CipherText = enacl:box(Msg, Nonce, PK2, SK1),
Err = enacl:box_open([<<"x">>, CipherText], Nonce, PK1, SK2),
Err = enacl:box_open_afternm([<<"x">>, CipherText], Nonce, Key),
equals(Err, {error, failed_verification});
false ->
case box(Msg, Nonce, PK2, SK1) of
@ -183,6 +189,60 @@ prop_box_failure_integrity() ->
end
end).
%% PRECOMPUTATIONS
beforenm_key() ->
?LET([{PK1, SK1}, {PK2, SK2}], [fault_rate(1, 40, keypair()), fault_rate(1, 40, keypair())],
case keypair_valid(PK1, SK1) andalso keypair_valid(PK2, SK2) of
true ->
enacl:box_beforenm(PK1, SK2);
false ->
oneof([
elements([a,b,c]),
real(),
?SUCHTHAT(X, binary(), byte_size(X) /= enacl:box_beforenm_bytes())
])
end).
v_key(K) when is_binary(K) -> byte_size(K) == enacl:box_beforenm_bytes();
v_key(_) -> false.
prop_beforenm_correct() ->
?FORALL([{PK1, SK1}, {PK2, SK2}], [fault_rate(1, 40, keypair()), fault_rate(1, 40, keypair())],
case keypair_valid(PK1, SK1) andalso keypair_valid(PK2, SK2) of
true ->
equals(enacl:box_beforenm(PK1, SK2), enacl:box_beforenm(PK2, SK1));
false ->
badargs(fun() ->
K = enacl:box_beforenm(PK1, SK2),
K = enacl:box_beforenm(PK2, SK1)
end)
end).
prop_afternm_correct() ->
?FORALL([Msg, Nonce, Key],
[fault_rate(1, 40, g_iodata()),
fault_rate(1, 40, nonce()),
fault_rate(1, 40, beforenm_key())],
begin
case v_iodata(Msg) andalso nonce_valid(Nonce) andalso v_key(Key) of
true ->
CipherText = enacl:box_afternm(Msg, Nonce, Key),
equals({ok, iolist_to_binary(Msg)}, enacl:box_open_afternm(CipherText, Nonce, Key));
false ->
try enacl:box_afternm(Msg, Nonce, Key) of
CipherText ->
try enacl:box_open_afternm(Msg, Nonce, Key) of
{ok, _M} -> false;
{error, failed_validation} -> false
catch
error:badarg -> true
end
catch
error:badarg -> true
end
end
end).
%% SIGNATURES
%% ----------