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)); }