Struct CtChoice 

pub struct CtChoice(Word);

A boolean value returned by constant-time const fns.

Tuple Fields

0: Word

Implementations

impl CtChoice

pub const FALSE: Self

The falsy value.

pub const TRUE: Self

The truthy value.

pub(crate) const fn from_mask(value: Word) -> Self

Returns the truthy value if value == Word::MAX, and the falsy value if value == 0. Panics for other values.

pub(crate) const fn from_lsb(value: Word) -> Self

Returns the truthy value if value == 1, and the falsy value if value == 0. Panics for other values.

pub(crate) const fn from_usize_being_nonzero(value: usize) -> Self

Returns the truthy value if value != 0, and the falsy value otherwise.

pub(crate) const fn from_usize_equality(x: usize, y: usize) -> Self

Returns the truthy value if x == y, and the falsy value otherwise.

pub(crate) const fn from_usize_lt(x: usize, y: usize) -> Self

Returns the truthy value if x < y, and the falsy value otherwise.

pub(crate) const fn not(&self) -> Self

pub(crate) const fn or(&self, other: Self) -> Self

pub(crate) const fn and(&self, other: Self) -> Self

pub(crate) const fn select(&self, a: Word, b: Word) -> Word

Return b if self is truthy, otherwise return a.

pub(crate) const fn if_true(&self, x: Word) -> Word

Return x if self is truthy, otherwise return 0.

pub(crate) const fn is_true_vartime(&self) -> bool

pub(crate) const fn to_u8(self) -> u8

Trait Implementations

impl Clone for CtChoice

fn clone(&self) -> CtChoice

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CtChoice

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

Formats the value using the given formatter.

impl From<CtChoice> for Choice

fn from(choice: CtChoice) -> Self

Converts to this type from the input type.

impl From<CtChoice> for bool

fn from(choice: CtChoice) -> Self

Converts to this type from the input type.

impl Copy for CtChoice