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Add tests and benchmark for MontgomeryPoint.ct_eq().

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Isis Lovecruft 2017-10-05 01:26:15 +00:00
parent d39cb275c5
commit 7e4fd5677c
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1 changed files with 32 additions and 0 deletions
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32
src/montgomery.rs
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@ -425,6 +425,7 @@ impl<'a, 'b> Mul<&'b MontgomeryPoint> for &'a Scalar {
#[cfg(test)]
mod test {
use constants::ED25519_BASEPOINT_TABLE;
use constants::BASE_COMPRESSED_MONTGOMERY;
use edwards::Identity;
use super::*;
@ -481,6 +482,26 @@ mod test {
assert_eq!(p.to_montgomery().compress(), q.compress());
}
#[test]
fn montgomery_ct_eq_ne() {
let mut csprng: OsRng = OsRng::new().unwrap();
let s1: Scalar = Scalar::random(&mut csprng);
let s2: Scalar = Scalar::random(&mut csprng);
let p1: MontgomeryPoint = (&s1 * &ED25519_BASEPOINT_TABLE).to_montgomery();
let p2: MontgomeryPoint = (&s2 * &ED25519_BASEPOINT_TABLE).to_montgomery();
assert_eq!(p1.ct_eq(&p2), 0);
}
#[test]
fn montgomery_ct_eq_eq() {
let mut csprng: OsRng = OsRng::new().unwrap();
let s1: Scalar = Scalar::random(&mut csprng);
let p1: MontgomeryPoint = (&s1 * &ED25519_BASEPOINT_TABLE).to_montgomery();
assert_eq!(p1.ct_eq(&p1), 1);
}
#[test]
fn differential_add_matches_edwards_model() {
let mut csprng: OsRng = OsRng::new().unwrap();
@ -532,6 +553,17 @@ mod bench {
use test::Bencher;
use super::*;
#[bench]
fn montgomery_ct_eq(b: &mut Bencher) {
let mut csprng: OsRng = OsRng::new().unwrap();
let s1: Scalar = Scalar::random(&mut csprng);
let s2: Scalar = Scalar::random(&mut csprng);
let p1: MontgomeryPoint = (&s1 * &ED25519_BASEPOINT_TABLE).to_montgomery();
let p2: MontgomeryPoint = (&s2 * &ED25519_BASEPOINT_TABLE).to_montgomery();
b.iter(| | p1.ct_eq(&p2))
}
#[bench]
fn montgomery_decompress(b: &mut Bencher) {
b.iter(| | BASE_COMPRESSED_MONTGOMERY.decompress());