SecureStringExtensions.cs

	public static class SecureStringExtensions
	{
		public static string GetSHA512(this SecureString input)
		{
			using (var sha512 = SHA512.Create())
			{
				byte[] password = Encoding.UTF8.GetBytes(ToNormalString(input));
				byte[] hash = sha512.ComputeHash(password);
				return Encoding.UTF8.GetString(hash);
			}
		}


		private static string ToNormalString(SecureString value)
		{
			IntPtr valuePtr = IntPtr.Zero;
			try
			{
				valuePtr = Marshal.SecureStringToGlobalAllocUnicode(value);
				return Marshal.PtrToStringUni(valuePtr);
			}
			finally
			{
				Marshal.ZeroFreeGlobalAllocUnicode(valuePtr);
			}
		}
	}