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#![cfg_attr(feature = "dev", feature(plugin))]
#![cfg_attr(feature = "dev", plugin(clippy))]
#![allow(non_upper_case_globals)]
use std::mem::size_of;
#[link(name = "scrypt")]
extern "C" {
pub fn crypto_scrypt(
passwd: *const u8,
passwdlen: usize,
salt: *const u8,
saltlen: usize,
N: u64,
r: u32,
p: u32,
buf: *mut u8,
buflen: usize,
) -> ::std::os::raw::c_int;
}
#[derive(Clone, Copy, Debug)]
pub struct ScryptParams {
pub n: u64,
pub r: u32,
pub p: u32,
}
impl ScryptParams {
pub fn new(n: u64, r: u32, p: u32) -> ScryptParams {
assert!(r > 0);
assert!(p > 0);
assert!(n > 0);
assert!(size_of::<usize>() >= size_of::<u32>() || (r <= std::usize::MAX as u32 && p < std::usize::MAX as u32));
ScryptParams { n,r, p }
}
}
pub fn scrypt(passwd: &[u8], salt: &[u8], params: &ScryptParams, output: &mut [u8]) {
unsafe {
crypto_scrypt(
passwd.as_ptr(),
passwd.len(),
salt.as_ptr(),
salt.len(),
params.n,
params.r,
params.p,
output.as_mut_ptr(),
output.len(),
);
}
}
#[cfg(test)]
mod tests {
extern crate hex;
use super::*;
use tests::hex::{decode, encode};
const SALT: &str = "fd4acb81182a2c8fa959d180967b374277f2ccf2f7f401cb08d042cc785464b4";
fn to_bytes<A, T>(slice: &[T]) -> A
where
A: AsMut<[T]> + Default,
T: Clone,
{
let mut arr = Default::default();
<A as AsMut<[T]>>::as_mut(&mut arr).clone_from_slice(slice);
arr
}
#[test]
fn test_scrypt_128() {
let salt: [u8; 32] = to_bytes(&decode(SALT).unwrap());
let passwd = "1234567890";
let mut buf = [0u8; 16];
let params = ScryptParams { n: 2, r: 8, p: 1 };
scrypt(passwd.as_bytes(), &salt, ¶ms, &mut buf);
assert_eq!("52a5dacfcf80e5111d2c7fbed177113a", encode(buf.as_ref()));
}
#[test]
fn test_scrypt_256() {
let salt: [u8; 32] = to_bytes(&decode(SALT).unwrap());
let passwd = "1234567890";
let mut buf = [0u8; 32];
let params = ScryptParams { n: 2, r: 8, p: 1 };
scrypt(passwd.as_bytes(), &salt, ¶ms, &mut buf);
assert_eq!(
"52a5dacfcf80e5111d2c7fbed177113a1b48a882b066a017f2c856086680fac7",
encode(buf.as_ref())
);
}
#[test]
fn test_scrypt_512() {
let salt: [u8; 32] = to_bytes(&decode(SALT).unwrap());
let passwd = "1234567890";
let mut buf = [0u8; 64];
let params = ScryptParams { n: 2, r: 8, p: 1 };
scrypt(passwd.as_bytes(), &salt, ¶ms, &mut buf);
assert_eq!(
"52a5dacfcf80e5111d2c7fbed177113a1b48a882b066a017f2c856086680fac7\
43ae0dd1ba325be061003ec144f1cad75ddbadd7bb01d22970b9904720b6ba27",
encode(buf.as_ref())
);
}
}