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Altera_Forum
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12 years ago

working on hashing algorithm SHA-2

I am working on implementing the hashing algorithm SHA-2(256) , while working on the algorithm I faced some problems on the padding section, actually according to the algo provided by wikipedia shows...
Altera_Forum's avatar
Altera_Forum
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12 years ago

When you cut your data in words of 512 bits, if you have enough unused bits in the last word (65 or more) then you don't need to add a separate 512-bit word. Just pad that last data word with the '1', if necessary some '0's, and the 64-bit length value.