[−][src]Trait subtle::ConstantTimeEq
An Eq-like trait that produces a Choice instead of a bool.
Example
use subtle::ConstantTimeEq; let x: u8 = 5; let y: u8 = 13; assert_eq!(x.ct_eq(&y).unwrap_u8(), 0); assert_eq!(x.ct_eq(&x).unwrap_u8(), 1);
Required methods
pub fn ct_eq(&self, other: &Self) -> Choice[src]
Determine if two items are equal.
The ct_eq function should execute in constant time.
Returns
Choice(1u8)ifself == other;Choice(0u8)ifself != other.
Implementations on Foreign Types
impl<T: ConstantTimeEq> ConstantTimeEq for [T][src]
pub fn ct_eq(&self, _rhs: &[T]) -> Choice[src]
Check whether two slices of ConstantTimeEq types are equal.
Note
This function short-circuits if the lengths of the input slices are different. Otherwise, it should execute in time independent of the slice contents.
Since arrays coerce to slices, this function works with fixed-size arrays:
let a: [u8; 8] = [0,1,2,3,4,5,6,7]; let b: [u8; 8] = [0,1,2,3,0,1,2,3]; let a_eq_a = a.ct_eq(&a); let a_eq_b = a.ct_eq(&b); assert_eq!(a_eq_a.unwrap_u8(), 1); assert_eq!(a_eq_b.unwrap_u8(), 0);