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// Copyright (c) 2017 Martijn Rijkeboer <mrr@sru-systems.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::fmt;
use super::error::Error;
use super::result::Result;
/// The Argon2 version.
#[derive(Clone, Copy, Debug, Eq, PartialEq, PartialOrd, Ord)]
pub enum Version {
/// Version 0x10.
Version10 = 0x10,
/// Version 0x13 (Recommended).
Version13 = 0x13,
}
impl Version {
/// Gets the u32 representation of the version.
pub fn as_u32(&self) -> u32 {
*self as u32
}
/// Attempts to create a version from a string slice.
pub fn from_str(str: &str) -> Result<Version> {
match str {
"16" => Ok(Version::Version10),
"19" => Ok(Version::Version13),
_ => Err(Error::DecodingFail),
}
}
/// Attempts to create a version from an u32.
pub fn from_u32(val: u32) -> Result<Version> {
match val {
0x10 => Ok(Version::Version10),
0x13 => Ok(Version::Version13),
_ => Err(Error::IncorrectVersion),
}
}
}
impl Default for Version {
fn default() -> Version {
Version::Version13
}
}
impl fmt::Display for Version {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.as_u32())
}
}
#[cfg(test)]
mod tests {
use error::Error;
use super::*;
#[test]
fn as_u32_returns_correct_u32() {
assert_eq!(Version::Version10.as_u32(), 0x10);
assert_eq!(Version::Version13.as_u32(), 0x13);
}
#[test]
fn default_returns_correct_version() {
assert_eq!(Version::default(), Version::Version13);
}
#[test]
fn display_returns_correct_string() {
assert_eq!(format!("{}", Version::Version10), "16");
assert_eq!(format!("{}", Version::Version13), "19");
}
#[test]
fn from_str_returns_correct_result() {
assert_eq!(Version::from_str("16"), Ok(Version::Version10));
assert_eq!(Version::from_str("19"), Ok(Version::Version13));
assert_eq!(Version::from_str("11"), Err(Error::DecodingFail));
}
#[test]
fn from_u32_returns_correct_result() {
assert_eq!(Version::from_u32(0x10), Ok(Version::Version10));
assert_eq!(Version::from_u32(0x13), Ok(Version::Version13));
assert_eq!(Version::from_u32(0), Err(Error::IncorrectVersion));
}
}
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