public void DecryptAes256Ctr_decrypts_one_block()
{
var ciphertext = NistCiphertext.Take(16).ToArray();
var plaintext = NistPlaintext.Take(16).ToArray();
Assert.Equal(plaintext, Util.DecryptAes256Ctr(ciphertext, NistKey, NistCtr));
}
public void ComputeAesCtrKey_returns_key()
{
// Calculated with the original Js code
var ctrKey = "1fad494b86d62e89f945e8cfb9925e341fad494b86d62e89f945e8cfb9925e34".DecodeHex();
Assert.Equal(ctrKey, Util.ComputeAesCtrKey(TestData.Key));
}
public void IncrementCounter_adds_one(string initial, string expected)
{
var counter = initial.DecodeHex();
Util.IncrementCounter(counter);
Assert.Equal(expected.DecodeHex(), counter);
}
public void Decrypt_returns_plaintext()
{
// Calculated with the original Js code
var plaintext = Util.Decrypt(
"awNZM8agxVecKpRoC821Oq6NlvVwm6KpPGW+cLdzRoc2Mg5vqPQzoONwww==".Decode64(),
TestData.Key).ToUtf8();
Assert.Equal("{\"date\":\"2016-08-30T15:05:42.874Z\"}", plaintext);
}
public void ComputeKey_returns_key()
{
var key = Util.ComputeKey(
TestData.Passphrase,
"f78e6ffce8e57501a02c9be303db2c68".ToBytes(),
1000);
Assert.Equal(TestData.Key, key);
}
public void DecryptAes256Ctr_decrypts_unaligned_input()
{
for (var i = 1; i < NistCiphertext.Length - 1; i += 1)
{
var ciphertext = NistCiphertext.Take(i).ToArray();
var plaintext = NistPlaintext.Take(i).ToArray();
Assert.Equal(plaintext, Util.DecryptAes256Ctr(ciphertext, NistKey, NistCtr));
}
}
public void DecryptAes256Ctr_decrypts_empty_input()
{
Assert.Equal(new byte[0], Util.DecryptAes256Ctr(new byte[0], NistKey, NistCtr));
}
public void DecryptAes256Ctr_decrypts_multiple_blocks()
{
Assert.Equal(NistPlaintext, Util.DecryptAes256Ctr(NistCiphertext, NistKey, NistCtr));
}
