/// <summary>
/// Decrypts the specified cipher text.
/// </summary>
/// <param name="algorithm">The <see cref="EncryptionAlgorithm"/> to use.</param>
/// <param name="ciphertext">The encrypted data to decrypt.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/> to cancel the operation.</param>
/// <returns>
/// The result of the decrypt operation. The returned <see cref="DecryptResult"/> contains the encrypted data
/// along with information regarding the algorithm and key used to decrypt it.
/// </returns>
/// <exception cref="ArgumentException">The specified <paramref name="algorithm"/> does not match the key corresponding to the key identifier.</exception>
/// <exception cref="CryptographicException">The local cryptographic provider threw an exception.</exception>
/// <exception cref="InvalidOperationException">The key is invalid for the current operation.</exception>
/// <exception cref="NotSupportedException">The operation is not supported with the specified key.</exception>
public virtual async Task <DecryptResult> DecryptAsync(EncryptionAlgorithm algorithm, byte[] ciphertext, CancellationToken cancellationToken = default)
{
DecryptResult result = null;
if (_provider.SupportsOperation(KeyOperation.Decrypt))
{
result = await _provider.DecryptAsync(algorithm, ciphertext, cancellationToken).ConfigureAwait(false);
}
return(result ?? throw LocalCryptographyProvider.CreateOperationNotSupported(nameof(KeyOperation.Decrypt)));
}
/// <summary>
/// Decrypts ciphertext.
/// </summary>
/// <param name="parameters">A <see cref="DecryptParameters"/> containing the data to decrypt and other parameters for algorithm-dependent decryption.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/> to cancel the operation.</param>
/// <returns>
/// The result of the decrypt operation. The returned <see cref="DecryptResult"/> contains the encrypted data
/// along with information regarding the algorithm and key used to decrypt it.
/// </returns>
/// <exception cref="ArgumentException">The specified algorithm does not match the key corresponding to the key identifier.</exception>
/// <exception cref="ArgumentNullException"><paramref name="parameters"/> is null.</exception>
/// <exception cref="CryptographicException">The local cryptographic provider threw an exception.</exception>
/// <exception cref="InvalidOperationException">The key is invalid for the current operation.</exception>
/// <exception cref="NotSupportedException">The operation is not supported with the specified key.</exception>
public virtual async Task <DecryptResult> DecryptAsync(DecryptParameters parameters, CancellationToken cancellationToken = default)
{
Argument.AssertNotNull(parameters, nameof(parameters));
DecryptResult result = null;
if (_provider.SupportsOperation(KeyOperation.Decrypt))
{
result = await _provider.DecryptAsync(parameters, cancellationToken).ConfigureAwait(false);
}
return(result ?? throw LocalCryptographyProvider.CreateOperationNotSupported(nameof(KeyOperation.Decrypt)));
}
/// <summary>
/// Decrypts the specified cipher text.
/// </summary>
/// <param name="algorithm">The algorithm to use</param>
/// <param name="ciphertext">The encrypted data to decrypt</param>
/// <param name="iv">
/// The initialization vector. This should only be specified when using symmetric encryption algorithms,
/// otherwise the caller must omit the parameter or pass null.
/// </param>
/// <param name="authenticationData">
/// The authentication data. This should only be specified when using authenticated symmetric encryption algorithms,
/// otherwise the caller must omit the parameter or pass null.
/// </param>
/// <param name="authenticationTag">The authentication tag. This should only be specified when using authenticated
/// symmetric encryption algorithms, otherwise the caller must omit the parameter or pass null.
/// </param>
/// <param name="cancellationToken">Cancellation token</param>
/// <returns>
/// The result of the decrypt operation. The returned <see cref="DecryptResult"/> contains the encrypted data
/// along with information regarding the algorithm and key used to decrypt it.
/// </returns>
public virtual async Task <DecryptResult> DecryptAsync(EncryptionAlgorithm algorithm, byte[] ciphertext, byte[] iv = default, byte[] authenticationData = default, byte[] authenticationTag = default, CancellationToken cancellationToken = default)
{
using DiagnosticScope scope = _pipeline.CreateScope("Azure.Security.KeyVault.Keys.Cryptography.CryptographyClient.Decrypt");
scope.AddAttribute("key", _keyId);
scope.Start();
try
{
return(await _cryptoProvider.DecryptAsync(algorithm, ciphertext, iv, authenticationData, authenticationTag, cancellationToken).ConfigureAwait(false));
}
catch (Exception e)
{
scope.Failed(e);
throw;
}
}
public async Task <IActionResult> Decrypt(string ciphertext)
{
var result = await _cryptographyProvider.DecryptAsync(ciphertext);
return(Json(result));
}