[System.Security.SecuritySafeCritical] // overrides public transparent member
protected override void Dispose(bool disposing)
{
if (_safeHashHandle != null && !_safeHashHandle.IsClosed)
{
_safeHashHandle.Dispose();
}
// call the base class's Dispose
base.Dispose(disposing);
}
public override void Dispose(bool disposing)
{
if (disposing)
{
_hHash?.Dispose();
_hProv?.Dispose();
}
}
private void DestroyHash()
{
SafeHashHandle hHash = _hHash;
_hHash = null;
if (hHash != null)
{
hHash.Dispose();
}
}
public override bool TryFinalizeHashAndReset(Span<byte> destination, out int bytesWritten)
{
int hashSize = HashSizeInBytes;
if (!Interop.Advapi32.CryptGetHashParam(_hHash, Interop.Advapi32.CryptHashProperty.HP_HASHVAL, destination, ref hashSize, 0))
{
int hr = Marshal.GetHRForLastWin32Error();
throw new CryptographicException(hr);
}
bytesWritten = hashSize;
//reinitialize
_hHash.Dispose();
if (!Interop.Advapi32.CryptCreateHash(_hProv, _calgHash, SafeKeyHandle.InvalidHandle, (int)Interop.Advapi32.CryptCreateHashFlags.None, out _hHash))
{
int hr = Marshal.GetHRForLastWin32Error();
throw new CryptographicException(hr);
}
_hHash.SetParent(_hProv);
return true;
}
public override bool TryFinalizeHashAndReset(Span <byte> destination, out int bytesWritten)
{
if (destination.Length < HashSizeInBytes)
{
bytesWritten = 0;
return(false);
}
int hashSize = HashSizeInBytes;
if (!Interop.Advapi32.CryptGetHashParam(_hHash, Interop.Advapi32.CryptHashProperty.HP_HASHVAL, destination, ref hashSize, 0))
{
int hr = Interop.CPError.GetHRForLastWin32Error();
throw new CryptographicException(hr);
}
bytesWritten = hashSize;
//reinitialize
_hHash.Dispose();
_hKey.Dispose();
_hProv.Dispose();
SetKey();
return(true);
}