Trait CtrFlavor

pub trait CtrFlavor<B: ArrayLength<u8>> {
    type CtrNonce: Clone;
    type Backend: Counter;

    const NAME: &'static str;

    // Required methods
    fn remaining(cn: &Self::CtrNonce) -> Option<usize>;
    fn next_block(cn: &mut Self::CtrNonce) -> GenericArray<u8, B>;
    fn current_block(cn: &Self::CtrNonce) -> GenericArray<u8, B>;
    fn from_nonce(block: &GenericArray<u8, B>) -> Self::CtrNonce;
    fn set_from_backend(cn: &mut Self::CtrNonce, v: Self::Backend);
    fn as_backend(cn: &Self::CtrNonce) -> Self::Backend;
}

Trait implemented by different CTR flavors.

Required Associated Constants

const NAME: &'static str

Flavor name

Required Associated Types

type CtrNonce: Clone

Inner representation of nonce.

type Backend: Counter

Backend numeric type

Required Methods

fn remaining(cn: &Self::CtrNonce) -> Option<usize>

Return number of remaining blocks.

If result does not fit into usize, returns None.

fn next_block(cn: &mut Self::CtrNonce) -> GenericArray<u8, B>

Generate block for given nonce and current counter value.

fn current_block(cn: &Self::CtrNonce) -> GenericArray<u8, B>

Generate block for given nonce and current counter value.

fn from_nonce(block: &GenericArray<u8, B>) -> Self::CtrNonce

Initialize from bytes.

fn set_from_backend(cn: &mut Self::CtrNonce, v: Self::Backend)

Convert from a backend value

fn as_backend(cn: &Self::CtrNonce) -> Self::Backend

Convert to a backend value

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<B> CtrFlavor<B> for Ctr32BE

where B: ArrayLength<u8> + PartialDiv<U4>, PartialQuot<B, U4>: ArrayLength<u32>,

const NAME: &'static str = "32BE"

type CtrNonce = CtrNonce32<<B as PartialDiv<UInt<UInt<UInt<UTerm, B1>, B0>, B0>>>::Output>

type Backend = u32

impl<B> CtrFlavor<B> for Ctr32LE

where B: ArrayLength<u8> + PartialDiv<U4>, PartialQuot<B, U4>: ArrayLength<u32>,

const NAME: &'static str = "32LE"

type CtrNonce = CtrNonce32<<B as PartialDiv<UInt<UInt<UInt<UTerm, B1>, B0>, B0>>>::Output>

type Backend = u32

impl<B> CtrFlavor<B> for Ctr64BE

where B: ArrayLength<u8> + PartialDiv<U8>, PartialQuot<B, U8>: ArrayLength<u64>,

const NAME: &'static str = "64BE"

type CtrNonce = CtrNonce64<<B as PartialDiv<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>>>::Output>

type Backend = u64

impl<B> CtrFlavor<B> for Ctr64LE

where B: ArrayLength<u8> + PartialDiv<U8>, PartialQuot<B, U8>: ArrayLength<u64>,

const NAME: &'static str = "64LE"

type CtrNonce = CtrNonce64<<B as PartialDiv<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>>>::Output>

type Backend = u64

impl<B> CtrFlavor<B> for Ctr128BE

where B: ArrayLength<u8> + PartialDiv<U16>, PartialQuot<B, U16>: ArrayLength<u128>,

const NAME: &'static str = "128BE"

type CtrNonce = CtrNonce128<<B as PartialDiv<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>>>::Output>

type Backend = u128

impl<B> CtrFlavor<B> for Ctr128LE

where B: ArrayLength<u8> + PartialDiv<U16>, PartialQuot<B, U16>: ArrayLength<u128>,

const NAME: &'static str = "128LE"

type CtrNonce = CtrNonce128<<B as PartialDiv<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>>>::Output>

type Backend = u128