Substraction of block bit position from 64
Michael2280309 opened this issue · 1 comments
Michael2280309 commented
The text block is a 64-bit integer. According to the initial permutation table we should have this algorithm:
- Get 58-th highest bit from text block. Thus we right shift block by (58-1) = 57 then bitwise AND-ing it with 1.
- But the code you wrote does right shifting by (64 - 58) = 6 positions. So we get the 7-th lower bit of the block instead of 58-th one.
Question: Are you considering the block to start from the lowest bit?
dhuertas commented
