public void Decrypt_throws_on_mismatching_mac()
{
var key = "SLBgfXoityZsz4ZWvpEPULPZMYGH6vSqh3PXTe5DmyM=".Decode64();
var iv = "XZ2vMa5oFCcp7BUAfPowvA==".Decode64();
var ciphertext = "1/GDPwJWo+2Iacio0UkRfR0zXXUufGjMIxD+y/A/YfQPKKep69B0nfbueqZJ1nA1pv15qVounBVJLhetVMGW7mKSxdVtTYObe0Uiqm/C9/s=".Decode64();
var mac = "mismatching MAC, mismatching MAC".ToBytes();
var cs = new CipherString(mode: CipherMode.Aes256CbcHmacSha256, iv: iv, ciphertext: ciphertext, mac: mac);
Exceptions.AssertThrowsCrypto(() => cs.Decrypt(key), "MAC doesn't match");
}
public void DecryptAes256_throws_on_invalid_input(string ciphertext, string iv, string key)
{
foreach (var cipherMode in new[] { CipherMode.ECB, CipherMode.CBC })
{
foreach (var padding in new[] { PaddingMode.None, PaddingMode.PKCS7 })
{
Exceptions.AssertThrowsCrypto(() => Crypto.DecryptAes256(ciphertext.ToBytes(),
iv.ToBytes(),
key.ToBytes(),
cipherMode,
padding));
}
}
}
static void Check(byte[] ciphertext, byte[] nonce, byte[] key)
{
Exceptions.AssertThrowsCrypto(() => Crypto.DecryptXChaCha20Poly1305(ciphertext, nonce, key),
"Tag doesn't match, the data is corrupted or the key is incorrect");
}