public override unsafe bool TryCreateSignature(ReadOnlySpan <byte> hash, Span <byte> destination, out int bytesWritten)
{
Span <byte> stackBuf = stackalloc byte[WindowsMaxQSize];
ReadOnlySpan <byte> source = AdjustHashSizeIfNecessary(hash, stackBuf);
using (SafeNCryptKeyHandle keyHandle = GetDuplicatedKeyHandle())
{
return(CngCommon.TrySignHash(keyHandle, source, destination, AsymmetricPaddingMode.None, null, out bytesWritten));
}
}
public override unsafe bool TryCreateSignature(ReadOnlySpan <byte> hash, Span <byte> destination, out int bytesWritten)
{
byte[] arrayToReturnToArrayPool = AdjustHashSizeIfNecessaryWithArrayPool(ref hash);
try
{
using (SafeNCryptKeyHandle keyHandle = GetDuplicatedKeyHandle())
{
return(CngCommon.TrySignHash(keyHandle, hash, destination, AsymmetricPaddingMode.None, null, out bytesWritten));
}
}
finally
{
if (arrayToReturnToArrayPool != null)
{
Array.Clear(arrayToReturnToArrayPool, 0, hash.Length);
ArrayPool <byte> .Shared.Return(arrayToReturnToArrayPool);
}
}
}
public override unsafe bool TryCreateSignature(ReadOnlySpan <byte> hash, Span <byte> destination, out int bytesWritten)
#endif
{
Span <byte> stackBuf = stackalloc byte[WindowsMaxQSize];
ReadOnlySpan <byte> source = AdjustHashSizeIfNecessary(hash, stackBuf);
using (SafeNCryptKeyHandle keyHandle = GetDuplicatedKeyHandle())
{
if (!CngCommon.TrySignHash(keyHandle, source, destination, AsymmetricPaddingMode.None, null, out bytesWritten))
{
bytesWritten = 0;
return(false);
}
}
#if INTERNAL_ASYMMETRIC_IMPLEMENTATIONS
if (signatureFormat == DSASignatureFormat.IeeeP1363FixedFieldConcatenation)
{
return(true);
}
if (signatureFormat != DSASignatureFormat.Rfc3279DerSequence)
{
Debug.Fail($"Missing internal implementation handler for signature format {signatureFormat}");
throw new CryptographicException(
SR.Cryptography_UnknownSignatureFormat,
signatureFormat.ToString());
}
return(AsymmetricAlgorithmHelpers.TryConvertIeee1363ToDer(
destination.Slice(0, bytesWritten),
destination,
out bytesWritten));
#else
return(true);
#endif
}