public void EncryptDecryptRoundtrips(EncryptionAlgorithm algorithm)
{
// Use a 256-bit key which will be truncated based on the selected algorithm.
byte[] k = new byte[] { 0xe2, 0x7e, 0xd0, 0xc8, 0x45, 0x12, 0xbb, 0xd5, 0x5b, 0x6a, 0xf4, 0x34, 0xd2, 0x37, 0xc1, 0x1f, 0xeb, 0xa3, 0x11, 0x87, 0x0f, 0x80, 0xf2, 0xc2, 0xe3, 0x36, 0x42, 0x60, 0xf3, 0x1c, 0x82, 0xc8 };
byte[] iv = new byte[] { 0x89, 0xb8, 0xad, 0xbf, 0xb0, 0x73, 0x45, 0xe3, 0x59, 0x89, 0x32, 0xa0, 0x9c, 0x51, 0x74, 0x41 };
byte[] aad = Encoding.UTF8.GetBytes("test");
JsonWebKey key = new JsonWebKey(new[] { KeyOperation.Encrypt, KeyOperation.Decrypt })
{
K = k,
};
AesCryptographyProvider provider = new AesCryptographyProvider(key, null);
byte[] plaintext = Encoding.UTF8.GetBytes("plaintext");
if (algorithm.IsAesGcm())
{
iv = iv.Take(AesGcmProxy.NonceByteSize);
}
EncryptOptions encryptOptions = new EncryptOptions(algorithm, plaintext, iv, aad);
EncryptResult encrypted = provider.Encrypt(encryptOptions, default);
#if !NETCOREAPP3_1
if (algorithm.IsAesGcm())
{
Assert.IsNull(encrypted);
Assert.Ignore($"AES-GCM is not supported on {RuntimeInformation.FrameworkDescription} on {RuntimeInformation.OSDescription}");
}
#endif
Assert.IsNotNull(encrypted);
switch (algorithm.ToString())
{
// TODO: Move to new test to make sure CryptoClient and LocalCryptoClient initialize a null ICM for AES-CBC(PAD).
case EncryptionAlgorithm.A128CbcValue:
CollectionAssert.AreEqual(
new byte[] { 0x63, 0x23, 0x21, 0xaf, 0x94, 0xf9, 0xe1, 0x21, 0xc2, 0xbd, 0xb1, 0x1b, 0x04, 0x89, 0x8c, 0x3a },
encrypted.Ciphertext);
CollectionAssert.AreEqual(iv, encrypted.Iv);
Assert.IsNull(encrypted.AuthenticationTag);
Assert.IsNull(encrypted.AdditionalAuthenticatedData);
break;
case EncryptionAlgorithm.A192CbcValue:
CollectionAssert.AreEqual(
new byte[] { 0x95, 0x9d, 0x75, 0x91, 0x09, 0x8b, 0x70, 0x0b, 0x9c, 0xfe, 0xaf, 0xcd, 0x60, 0x1f, 0xaa, 0x79 },
encrypted.Ciphertext);
CollectionAssert.AreEqual(iv, encrypted.Iv);
Assert.IsNull(encrypted.AuthenticationTag);
Assert.IsNull(encrypted.AdditionalAuthenticatedData);
break;
case EncryptionAlgorithm.A256CbcValue:
CollectionAssert.AreEqual(
new byte[] { 0xf4, 0xe8, 0x5a, 0xa4, 0xa8, 0xb3, 0xff, 0xc3, 0x85, 0x89, 0x17, 0x9a, 0x70, 0x09, 0x96, 0x7f },
encrypted.Ciphertext);
CollectionAssert.AreEqual(iv, encrypted.Iv);
Assert.IsNull(encrypted.AuthenticationTag);
Assert.IsNull(encrypted.AdditionalAuthenticatedData);
break;
case EncryptionAlgorithm.A128CbcPadValue:
CollectionAssert.AreEqual(
new byte[] { 0xec, 0xb2, 0x63, 0x4c, 0xe0, 0x04, 0xe0, 0x31, 0x2d, 0x9a, 0x77, 0xb2, 0x11, 0xe5, 0x28, 0x7f },
encrypted.Ciphertext);
CollectionAssert.AreEqual(iv, encrypted.Iv);
Assert.IsNull(encrypted.AuthenticationTag);
Assert.IsNull(encrypted.AdditionalAuthenticatedData);
break;
case EncryptionAlgorithm.A192CbcPadValue:
CollectionAssert.AreEqual(
new byte[] { 0xc3, 0x4e, 0x1b, 0xe7, 0x6e, 0xa1, 0xf1, 0xc3, 0x24, 0xae, 0x05, 0x1b, 0x0e, 0x32, 0xac, 0xb4 },
encrypted.Ciphertext);
CollectionAssert.AreEqual(iv, encrypted.Iv);
Assert.IsNull(encrypted.AuthenticationTag);
Assert.IsNull(encrypted.AdditionalAuthenticatedData);
break;
case EncryptionAlgorithm.A256CbcPadValue:
CollectionAssert.AreEqual(
new byte[] { 0x4e, 0xbd, 0x78, 0xda, 0x90, 0x73, 0xc8, 0x97, 0x67, 0x2b, 0xa1, 0x0a, 0x41, 0x67, 0xf8, 0x99 },
encrypted.Ciphertext);
CollectionAssert.AreEqual(iv, encrypted.Iv);
Assert.IsNull(encrypted.AuthenticationTag);
Assert.IsNull(encrypted.AdditionalAuthenticatedData);
break;
case EncryptionAlgorithm.A128GcmValue:
case EncryptionAlgorithm.A192GcmValue:
case EncryptionAlgorithm.A256GcmValue:
Assert.IsNotNull(encrypted.Ciphertext);
Assert.IsNotNull(encrypted.Iv);
Assert.IsNotNull(encrypted.AuthenticationTag);
CollectionAssert.AreEqual(aad, encrypted.AdditionalAuthenticatedData);
break;
}
DecryptOptions decryptOptions = algorithm.IsAesGcm() ?
new DecryptOptions(algorithm, encrypted.Ciphertext, encrypted.Iv, encrypted.AuthenticationTag, encrypted.AdditionalAuthenticatedData) :
new DecryptOptions(algorithm, encrypted.Ciphertext, encrypted.Iv);
DecryptResult decrypted = provider.Decrypt(decryptOptions, default);
Assert.IsNotNull(decrypted);
// AES-CBC will be zero-padded.
StringAssert.StartsWith("plaintext", Encoding.UTF8.GetString(decrypted.Plaintext));
}
