SHA-1 Algorithm Step-by-step implementation
What?
This repository contains simple implementation of the SHA1 hashing algorithm.
All steps a separated with comments to help understand what is really happening and letting you debug/log at the different stages of the process.
If you are looking for a more summarized view / pseudocode of the algorithm I'll recommend having a look at the SHA1 Wikipedia Page.
Why?
There is no specific reason as to why a SHA1 over SHA2 for example, I just found the overall algorithm to be interesting and a good exercise for people looking into a new programming / scripting language.
There is already a function/operator for...
The clear goal here is just about understanding, as such I found it better for people to see actual implementation of the binary operators (or, xor, and...), and to sometime split code that could be factorized. This is definitely not the best solution if you are looking for performances.
SHA1, Security, Bad
SHA1 as a hashing algorithm is deprecated, use SHA-256 instead.
Note: There are plenty use-case for hashing algorithm resulting
in plenty levels of speed<--->safety.
Very fast / less secure algorithm like CRC-32 are good to check for
corrupted data while slower / more secure algorithm like bcrypt are
best used for password hashing.