saymrwulf/risc0-curve25519-dalek-source
1
0
Fork 0
mirror of https://github.com/saymrwulf/risc0-curve25519-dalek-source.git synced 2026-09-07 20:30:39 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Rename subtle::bytes_equal_ct() to bytes_equal().

Browse source
This commit is contained in:
Isis Lovecruft 2017-05-27 18:35:34 +00:00
parent 1c4f283be4
commit 648f95887a
Failed to extract signature
2 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/curve.rs
View file

@ -91,7 +91,7 @@ use constants;
use field::FieldElement; use field::FieldElement;
use scalar::Scalar; use scalar::Scalar;
use subtle::arrays_equal; use subtle::arrays_equal;
use subtle::bytes_equal_ct; use subtle::bytes_equal;
use subtle::CTAssignable; use subtle::CTAssignable;
use subtle::CTEq; use subtle::CTEq;
use subtle::CTNegatable; use subtle::CTNegatable;
@ -1081,7 +1081,7 @@ fn select_precomputed_point<T>(x: i8, points: &[T; 8]) -> T
for j in 1..9 { for j in 1..9 {
// Copy `points[j-1] == j*P` onto `t` in constant time if `|x| == j`. // Copy `points[j-1] == j*P` onto `t` in constant time if `|x| == j`.
t.conditional_assign(&points[j-1], t.conditional_assign(&points[j-1],
bytes_equal_ct(xabs as u8, j as u8)); bytes_equal(xabs as u8, j as u8));
} }
// Now t == |x| * P. // Now t == |x| * P.

4
src/subtle.rs
View file

@ -57,7 +57,7 @@ impl<T> CTNegatable for T
/// ///
/// Returns `1u8` if `a == b` and `0u8` otherwise. /// Returns `1u8` if `a == b` and `0u8` otherwise.
#[inline(always)] #[inline(always)]
pub fn bytes_equal_ct(a: u8, b: u8) -> u8 { pub fn bytes_equal(a: u8, b: u8) -> u8 {
let mut x: u8; let mut x: u8;
x = !(a ^ b); x = !(a ^ b);
@ -149,7 +149,7 @@ pub fn arrays_equal(a: &[u8], b: &[u8]) -> u8 {
for i in 0 .. a.len() { for i in 0 .. a.len() {
x |= a[i] ^ b[i]; x |= a[i] ^ b[i];
} }
bytes_equal_ct(x, 0) bytes_equal(x, 0)
} }
#[cfg(test)] #[cfg(test)]