pub trait Secret {}

pub trait Pbkdf2Secret {
    fn salt(&self) -> &[u8];
    fn iterations(&self) -> usize;
    fn digest(&self) -> &[u8];
}

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Plain(pub String);

impl Secret for Plain {}

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Pbkdf2Sha1 {
    pub salt: Vec<u8>,
    pub iterations: usize,
    pub digest: Vec<u8>,
}

impl Secret for Pbkdf2Sha1 {}

impl Pbkdf2Secret for Pbkdf2Sha1 {
    fn salt(&self) -> &[u8] { &self.salt }
    fn iterations(&self) -> usize { self.iterations }
    fn digest(&self) -> &[u8] { &self.digest }
}

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Pbkdf2Sha256 {
    pub salt: Vec<u8>,
    pub iterations: usize,
    pub digest: Vec<u8>,
}

impl Secret for Pbkdf2Sha256 {}

impl Pbkdf2Secret for Pbkdf2Sha256 {
    fn salt(&self) -> &[u8] { &self.salt }
    fn iterations(&self) -> usize { self.iterations }
    fn digest(&self) -> &[u8] { &self.digest }
}