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mod general;
mod ascon;
use std::{ io, fmt };
use std::error::Error;
pub use self::general::General;
pub use self::ascon::Ascon;
#[derive(Debug)]
pub enum DecryptFail {
LengthError,
AuthenticationFail,
Other(io::Error)
}
pub trait AeadCipher {
fn new(key: &[u8]) -> Self;
fn key_length() -> usize;
fn tag_length() -> usize;
fn nonce_length() -> usize;
fn with_aad(&mut self, aad: &[u8]) -> &mut Self;
fn encrypt(&mut self, nonce: &[u8], data: &[u8]) -> Vec<u8>;
fn decrypt(&mut self, nonce: &[u8], data: &[u8]) -> Result<Vec<u8>, DecryptFail>;
}
impl fmt::Display for DecryptFail {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.description())
}
}
impl Error for DecryptFail {
fn description(&self) -> &str {
match *self {
DecryptFail::LengthError => "Ciphertext length error.",
DecryptFail::AuthenticationFail => "Tag authentication fail.",
DecryptFail::Other(ref err) => err.description()
}
}
}
impl From<io::Error> for DecryptFail {
fn from(err: io::Error) -> DecryptFail {
DecryptFail::Other(err)
}
}