Struct libss::gf256::GF256

pub struct GF256(pub u8);

Represents an element in the field GF(2**8) without the use of lookup tables. This module uses subtle to hopefully achieve constant time guarantees, however this code has not been audited and should not be used in production.

Methods

impl GF256

pub fn pow(self, elem: u8) -> Self

Trait Implementations

impl Field for GF256

fn zero() -> Self

Returns the zero element of the field (additive identity)

fn one() -> Self

Returns the zero element of the field (multiplicative identity)

fn is_zero(&self) -> bool

Returns true if this element is the additive identity

fn square(&mut self)

Squares the element

fn inverse(&self) -> Option<Self>

Returns multiplicative inverse (self^254)

impl Eq for GF256

impl PartialEq<GF256> for GF256

fn eq(&self, other: &GF256) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use]

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Copy for GF256

impl Clone for GF256

fn clone(&self) -> GF256

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GF256

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Display for GF256

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Sub<GF256> for GF256

type Output = GF256

The resulting type after applying the - operator.

fn sub(self, other: GF256) -> GF256

Performs the - operation.

impl Add<GF256> for GF256

type Output = GF256

The resulting type after applying the + operator.

fn add(self, other: GF256) -> GF256

Performs the + operation.

impl Mul<GF256> for GF256

type Output = GF256

The resulting type after applying the * operator.

fn mul(self, rhs: GF256) -> GF256

Performs the * operation.

impl Div<GF256> for GF256

type Output = Self

The resulting type after applying the / operator.

fn div(self, rhs: Self) -> Self

Performs the / operation.

impl Neg for GF256

type Output = GF256

The resulting type after applying the - operator.

fn neg(self) -> GF256

Performs the unary - operation.

impl AddAssign<GF256> for GF256

fn add_assign(&mut self, other: GF256)

Performs the += operation.

impl SubAssign<GF256> for GF256

fn sub_assign(&mut self, other: GF256)

Performs the -= operation.

impl MulAssign<GF256> for GF256

fn mul_assign(&mut self, rhs: GF256)

Performs the *= operation.

impl DivAssign<GF256> for GF256

fn div_assign(&mut self, rhs: GF256)

Performs the /= operation.

impl Rand for GF256

fn rand<R: Rng>(rng: &mut R) -> GF256

Generates a random instance of this type using the specified source of randomness.

impl ConstantTimeEq for GF256

fn ct_eq(&self, other: &Self) -> Choice

Determine if two items are equal.

impl ConditionallySelectable for GF256

fn conditional_select(a: &Self, b: &Self, choice: Choice) -> Self

Select a or b according to choice.

fn conditional_assign(&mut self, other: &Self, choice: Choice)

Conditionally assign other to self, according to choice.

fn conditional_swap(a: &mut Self, b: &mut Self, choice: Choice)

Conditionally swap self and other if choice == 1; otherwise, reassign both unto themselves.