public Task <bool> VerifyAsync(byte[] digest, byte[] signature, string algorithm, CancellationToken token = default(CancellationToken))
{
if (_csp == null)
{
throw new ObjectDisposedException(string.Format("RsaKey {0} is disposed", Kid));
}
if (digest == null)
{
throw new ArgumentNullException("digest");
}
if (signature == null)
{
throw new ArgumentNullException("signature");
}
if (algorithm == null)
{
algorithm = DefaultSignatureAlgorithm;
}
AsymmetricSignatureAlgorithm algo = AlgorithmResolver.Default[algorithm] as AsymmetricSignatureAlgorithm;
ISignatureTransform transform = algo != null?algo.CreateSignatureTransform(_csp) : null;
if (algo == null || transform == null)
{
throw new NotSupportedException("algorithm is not supported");
}
try
{
var result = transform.Verify(digest, signature);
return(Task.FromResult(result));
}
catch (Exception ex)
{
return(TaskException.FromException <bool>(ex));
}
}
public Task <Tuple <byte[], string> > SignAsync(byte[] digest, string algorithm, CancellationToken token = default(CancellationToken))
{
if (_csp == null)
{
throw new ObjectDisposedException(string.Format("RsaKey {0} is disposed", Kid));
}
if (algorithm == null)
{
algorithm = DefaultSignatureAlgorithm;
}
if (digest == null)
{
throw new ArgumentNullException("digest");
}
// TODO: Not available via the RSA class
//if ( _csp.PublicOnly )
// throw new NotSupportedException( "Sign is not supported because no private key is available" );
AsymmetricSignatureAlgorithm algo = AlgorithmResolver.Default[algorithm] as AsymmetricSignatureAlgorithm;
ISignatureTransform transform = algo != null?algo.CreateSignatureTransform(_csp) : null;
if (algo == null || transform == null)
{
throw new NotSupportedException("algorithm is not supported");
}
try
{
var result = new Tuple <byte[], string>(transform.Sign(digest), algorithm);
return(Task.FromResult(result));
}
catch (Exception ex)
{
return(TaskException.FromException <Tuple <byte[], string> >(ex));
}
}