piston-mc 0.1.2-beta

A library for interacting with mojangs piston-mc api
Documentation 
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#![doc = include_str!("../.wiki/ShaValidation.md")]

use sha1::{Digest, Sha1};
use std::fs::File;
use std::io::{BufReader, Read};
use std::path::Path;

#[derive(Debug, thiserror::Error)]
pub enum SHAError {
    #[error("SHA validation failed for file: {0}")]
    FailedValidation(String),
}

pub fn validate_file(path: impl AsRef<Path>, hash: impl AsRef<str>) -> bool {
    let Ok(file) = File::open(path.as_ref()) else {
        return false;
    };

    let mut reader = BufReader::new(file);
    let mut hasher = Sha1::new();
    let mut buffer = [0u8; 8192];

    loop {
        match reader.read(&mut buffer) {
            Ok(0) => break,
            Ok(n) => hasher.update(&buffer[..n]),
            Err(_) => return false,
        }
    }

    let result = hasher.finalize();
    let computed: String = result.iter().map(|b| format!("{:02x}", b)).collect();
    computed.eq_ignore_ascii_case(hash.as_ref())
}