This is my implementation of SHA-1. This project's goal was to learn how Secure Hash Algorithm and its successors work and how to implement them using rust.

Comparison hash for test.txt was generated with a tool shipped with 7-zip and for test strings a web tool was used.

Warning

Do not use SHA-1 for authentication or to provide proof against tampering. It is not considered secure in that regard. Use SHA-2 or later instead. SHA-1 can be used for integrity checks for data that is transmitted or compressed but not for authenticity checks. In other words, do not use this in any application that needs security.

Example usage

Put lib.rs into a directory in your src. In this example the directory is named sha1.

Into your Cargo.toml you need to add the following:

[lib]
name = "sha1"
path = "src/sha1/lib.rs"

And into your code files that use this library, you need to add:

use sha1::*;

This library implements trait HashSHA1 for Strings, primitive strings, byte vectors, arrays and slices so you can call method sha1() for them directly.

// Simple main.rs example
use sha1::*;

fn main() {
    // Produces a lower case hexadecimal hash string from str "Testimerkkijono"
    let hash: String = "Testimerkkijono".sha1().to_lhex();

    println!("{hash}");
}