Fix rekey, improve coverage

ChaChaPoly key is expected to be 256 bits long. It's safe to disregard the MAC portion.
2021-04-27 15:37:48 +01:00
parent 991d7390ea
commit ffde489e53
3 changed files with 20 additions and 0 deletions
@@ -44,6 +44,13 @@ chachapoly_test() ->
        enoise_crypto:decrypt('ChaChaPoly', Key, Nonce, AD, <<CipherText/binary, MAC/binary>>),

    ?assertMatch(PlainText, PlainText0),
+
+    Key1 = enoise_crypto:rekey('ChaChaPoly', Key),
+    <<CipherText1:CTLen/binary, MAC1:MACLen/binary>> =
+        enoise_crypto:encrypt('ChaChaPoly', Key1, Nonce, AD, PlainText),
+    <<PlainText1:PTLen/binary>> =
+        enoise_crypto:decrypt('ChaChaPoly', Key1, Nonce, AD, <<CipherText1/binary, MAC1/binary>>),
+    ?assertMatch(PlainText, PlainText1),
    ok.

 blake2b_test() ->