public override EncryptResult Encrypt(EncryptOptions options, CancellationToken cancellationToken = default)
{
Argument.AssertNotNull(options, nameof(options));
ThrowIfTimeInvalid();
EncryptionAlgorithm algorithm = options.Algorithm;
if (algorithm.GetAesCbcEncryptionAlgorithm() is AesCbc aesCbc)
{
// Make sure the IV is initialized.
options.Initialize();
using ICryptoTransform encryptor = aesCbc.CreateEncryptor(KeyMaterial.K, options.Iv);
byte[] plaintext = options.Plaintext;
byte[] ciphertext = encryptor.TransformFinalBlock(plaintext, 0, plaintext.Length);
return(new EncryptResult
{
Algorithm = algorithm,
KeyId = KeyMaterial.Id,
Ciphertext = ciphertext,
Iv = options.Iv,
});
}
else
{
KeysEventSource.Singleton.AlgorithmNotSupported(nameof(Encrypt), algorithm);
return(null);
}
}
public override EncryptResult Encrypt(EncryptOptions options, CancellationToken cancellationToken = default)
{
Argument.AssertNotNull(options, nameof(options));
ThrowIfTimeInvalid();
EncryptionAlgorithm algorithm = options.Algorithm;
if (algorithm.GetAesCbcEncryptionAlgorithm() is AesCbc aesCbc)
{
// Make sure the IV is initialized.
options.Initialize();
using ICryptoTransform encryptor = aesCbc.CreateEncryptor(KeyMaterial.K, options.Iv);
byte[] plaintext = options.Plaintext;
byte[] ciphertext = encryptor.TransformFinalBlock(plaintext, 0, plaintext.Length);
return(new EncryptResult
{
Algorithm = algorithm,
KeyId = KeyMaterial.Id,
Ciphertext = ciphertext,
Iv = options.Iv,
});
}
else if (algorithm.IsAesGcm() && AesGcmProxy.TryCreate(KeyMaterial.K, out AesGcmProxy aesGcm))
{
using (aesGcm)
{
byte[] plaintext = options.Plaintext;
byte[] ciphertext = new byte[plaintext.Length];
byte[] tag = new byte[AesGcmProxy.NonceByteSize];
// Generate an nonce only for local AES-GCM; Managed HSM will do it service-side and err if serialized.
byte[] iv = Crypto.GenerateIv(AesGcmProxy.NonceByteSize);
aesGcm.Encrypt(iv, plaintext, ciphertext, tag, options.AdditionalAuthenticatedData);
return(new EncryptResult
{
Algorithm = algorithm,
KeyId = KeyMaterial.Id,
Ciphertext = ciphertext,
Iv = iv,
AuthenticationTag = tag,
AdditionalAuthenticatedData = options.AdditionalAuthenticatedData,
});
}
}
else
{
KeysEventSource.Singleton.AlgorithmNotSupported(nameof(Encrypt), algorithm);
return(null);
}
}
public virtual async Task <Response <EncryptResult> > EncryptAsync(EncryptOptions options, CancellationToken cancellationToken = default)
{
using DiagnosticScope scope = Pipeline.CreateScope($"{nameof(RemoteCryptographyClient)}.{nameof(Encrypt)}");
scope.AddAttribute("key", _keyId);
scope.Start();
try
{
// Make sure the IV is initialized.
// TODO: Remove this call once the service will initialized it: https://github.com/Azure/azure-sdk-for-net/issues/16175
options.Initialize();
return(await Pipeline.SendRequestAsync(RequestMethod.Post, options, () => new EncryptResult { Algorithm = options.Algorithm }, cancellationToken, "/encrypt").ConfigureAwait(false));
}
catch (Exception e)
{
scope.Failed(e);
throw;
}
}
