public static SafeHashHandle BCryptCreateHash(this SafeAlgorithmHandle hAlgorithm, byte[] pbSecret, int dwFlags)
{
SafeHashHandle hHash = null;
NTSTATUS ntStatus = Interop.BCryptCreateHash(hAlgorithm, out hHash, IntPtr.Zero, 0, pbSecret, pbSecret == null ? 0 : pbSecret.Length, dwFlags);
if (ntStatus != NTSTATUS.STATUS_SUCCESS)
{
throw CreateCryptographicException(ntStatus);
}
return(hHash);
}
public static SafeHashHandle BCryptTryCreateReusableHash(this SafeAlgorithmHandle hAlgorithm, byte[] pbSecret)
{
const int BCRYPT_HASH_REUSABLE_FLAG = 0x00000020;
SafeHashHandle hHash = null;
NTSTATUS ntStatus = Interop.BCryptCreateHash(hAlgorithm, out hHash, IntPtr.Zero, 0, pbSecret, pbSecret == null ? 0 : pbSecret.Length, BCRYPT_HASH_REUSABLE_FLAG);
if (ntStatus == NTSTATUS.STATUS_INVALID_PARAMETER)
{
return(null); // Pre-Win8 OS's do not support BCRYPT_HASH_REUSABLE_FLAG.
}
if (ntStatus != NTSTATUS.STATUS_SUCCESS)
{
throw CreateCryptographicException(ntStatus);
}
return(hHash);
}
