In Wikipedia pseudo code of SHA-512 the padding section says pad 1 bit then 0 bits. It then goes on to say append length without 1 or 0 padding. What does that mean?
append length of message (without the '1' bit or padding), in bits, as 64-bit big-endian integer
The appending of message length in sha-2 as a 64 bit integer without 1 and 0 padding is a bit confusing. How is it different from SHA-1?