Trait CtSelect 

pub trait CtSelect: Sized {
    // Required method
    fn ct_select(&self, other: &Self, choice: Choice) -> Self;

    // Provided method
    fn ct_swap(&mut self, other: &mut Self, choice: Choice) { ... }
}

Constant-time selection: choose between two values based on a given Choice.

This crate provides built-in implementations for the following types:

• i8, i16, i32, i64, i128, isize
• u8, u16, u32, u64, u128, usize
• NonZeroI8, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI128, NonZeroI128
• NonZeroU8, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU128,, NonZeroUsize
• cmp::Ordering
• Choice
• [T; N] where T impls CtSelectArray, which the previously mentioned types all do, as well as any type which impls Clone + CtAssignSlice + CtSelect.

Required Methods

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

Select between self and other based on choice, returning a copy of the value.

Returns

• self if choice is Choice::FALSE.
• other if choice is Choice::TRUE.

Provided Methods

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

Conditionally swap self and other if choice is Choice::TRUE.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl CtSelect for Choice

Available on crate feature subtle only.

fn ct_select(&self, other: &Choice, choice: Choice) -> Choice

impl<T, const N: usize> CtSelect for [T; N]

where T: CtSelectArray<N>,

fn ct_select(&self, other: &[T; N], choice: Choice) -> [T; N]

impl<T> CtSelect for CtOption<T>

where T: CtSelect + Default + ConditionallySelectable,

Available on crate feature subtle only.

fn ct_select(&self, other: &CtOption<T>, choice: Choice) -> CtOption<T>

Implementors

impl CtSelect for Limb

impl CtSelect for Reciprocal

impl<T> CtSelect for Checked<T>

where T: CtSelect,

impl<T> CtSelect for crypto_bigint::CtOption<T>

where T: CtSelect,

impl<T> CtSelect for NonZero<T>

where T: CtSelect,

impl<T> CtSelect for Odd<T>

where T: CtSelect,

impl<T> CtSelect for T

where T: CtSelectUsingCtAssign,

impl<T> CtSelect for Wrapping<T>

where T: CtSelect,

impl<const LIMBS: usize> CtSelect for Int<LIMBS>

impl<const LIMBS: usize> CtSelect for Uint<LIMBS>