private static byte[] smethod_5(byte[] byte_0, string string_0)
{
if (byte_0 != null && string_0 != null)
{
byte[] array = new byte[byte_0.Length];
byte[] array2 = AuthCode.smethod_2(AuthCode.encoding_0.GetBytes(string_0), 256);
long num = 0L;
long num2 = 0L;
for (long num3 = 0L; num3 < (long)byte_0.Length; num3 += 1L)
{
num = (num + 1L) % (long)array2.Length;
num2 = (num2 + (long)array2[(int)(checked ((IntPtr)num))]) % (long)array2.Length;
checked
{
byte b = array2[(int)((IntPtr)num)];
array2[(int)((IntPtr)num)] = array2[(int)((IntPtr)num2)];
array2[(int)((IntPtr)num2)] = b;
byte b2 = byte_0[(int)((IntPtr)num3)];
byte b3 = array2[(int)(unchecked (array2[(int)(checked ((IntPtr)num))] + array2[(int)(checked ((IntPtr)num2))])) % array2.Length];
array[(int)((IntPtr)num3)] = (byte)(b2 ^ b3);
}
}
return(array);
}
return(null);
}
