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pub mod encryptor;
pub mod signer;

pub use crate::Error;
#[cfg(feature = "raw-crypto")]
pub use encryptor::CryptoAlgorithm;
#[cfg(feature = "raw-crypto")]
pub use signer::SignatureAlgorithm;

/// Return `FnOnce` signature definition for symmetric cryptography method.
/// Arguments sequence: Nonce, Key, Message.
///
pub type SymmetricCypherMethod = Box<dyn Fn(&[u8], &[u8], &[u8]) -> Result<Vec<u8>, Error>>;
/// Return `FnOnce` signature definition for assymmetric cryptography method.
/// Arguments sequence: Nonce, Key, Message.
///
pub type AssymetricCyptherMethod = Box<dyn Fn(&[u8], &[u8], &[u8], &[u8]) -> Result<Vec<u8>, Error>>;
/// Return `FnOnce` signature definition for signature signing method.
/// .0 == `key: &[u8]`; .1 == `message`;
///
pub type SigningMethod = Box<dyn Fn(&[u8], &[u8]) -> Result<Vec<u8>, Error>>;
/// Return `FnOnce` signature definition for signature validating method.
/// .0 == `key: &[u8]`; .1 == `message`; .2 == `signature`;
///
pub type ValidationMethod = Box<dyn Fn(&[u8], &[u8], &[u8]) -> Result<bool, Error>>;

/// Trait must be implemented for plugable cryptography.
/// Implemented by `CryptoAlgorithm` with `raw-crypto` feature.
///
pub trait Cypher {
    fn encryptor(&self) -> SymmetricCypherMethod;
    fn decryptor(&self) -> SymmetricCypherMethod;
    fn assymetric_encryptor(&self) -> AssymetricCyptherMethod;
}

/// Trait must be implemented for plugablu signatures.
/// Implemented by `SignatureAlgorithm` with `raw-crypto` feature.
///
pub trait Signer {
    fn signer(&self) -> SigningMethod;
    fn validator(&self) -> ValidationMethod;
}