use sha2::{Sha256, Digest};
fn sha256(input: &str) -> String {
// 1. Create a Sha256 hasher
let mut hasher = Sha256::new();
// 2. Feed input bytes
hasher.update(input.as_bytes());
// 3. Finalize and get the hash bytes (GenericArray<u8, 32>)
let result = hasher.finalize();
// 4. Convert each byte to two‑digit hex and collect into a String
result.iter().map(|b| format!("{:02x}", b)).collect::<String>()
}
fn main() {
let input = "Rust programming language";
let hash = sha256(input);
println!("Input: {}", input);
println!("Hash: {}", hash);
}
/*
run:
Input: Rust programming language
Hash: df7b36e38addb3eee57d78dde9070c4b9c53ecbe38b546b5937a21e4e58a3a6a
*/
