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#![no_std]
pub extern crate generic_array;
#[cfg(feature = "std")]
extern crate std;
use generic_array::{GenericArray, ArrayLength};
use generic_array::typenum::Unsigned;
mod errors;
#[cfg(feature = "dev")]
pub mod dev;
pub use errors::InvalidKeyLength;
type ParBlocks<B, P> = GenericArray<GenericArray<u8, B>, P>;
pub trait BlockCipher: core::marker::Sized {
type KeySize: ArrayLength<u8>;
type BlockSize: ArrayLength<u8>;
type ParBlocks: ArrayLength<GenericArray<u8, Self::BlockSize>>;
fn new(key: &GenericArray<u8, Self::KeySize>) -> Self;
fn new_varkey(key: &[u8]) -> Result<Self, InvalidKeyLength> {
if key.len() != Self::KeySize::to_usize() {
Err(InvalidKeyLength)
} else {
Ok(Self::new(GenericArray::from_slice(key)))
}
}
fn encrypt_block(&self, block: &mut GenericArray<u8, Self::BlockSize>);
fn decrypt_block(&self, block: &mut GenericArray<u8, Self::BlockSize>);
#[inline]
fn encrypt_blocks(&self,
blocks: &mut ParBlocks<Self::BlockSize, Self::ParBlocks>)
{
for block in blocks.iter_mut() { self.encrypt_block(block); }
}
#[inline]
fn decrypt_blocks(&self,
blocks: &mut ParBlocks<Self::BlockSize, Self::ParBlocks>)
{
for block in blocks.iter_mut() { self.decrypt_block(block); }
}
}