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Add constant for 4*d

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Henry de Valence 2017-01-31 17:19:34 -05:00
parent fb0c431184
commit 6fd3028956
1 changed files with 10 additions and 0 deletions
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10
src/constants.rs
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@ -29,6 +29,9 @@ pub const d: FieldElement = FieldElement([
pub const d2: FieldElement = FieldElement([ pub const d2: FieldElement = FieldElement([
-21827239, -5839606, -30745221, 13898782, 229458, -21827239, -5839606, -30745221, 13898782, 229458,
15978800, -12551817, -6495438, 29715968, 9444199, ]); 15978800, -12551817, -6495438, 29715968, 9444199, ]);
pub const d4: FieldElement = FieldElement([
23454405, -11679213, 5618422, -5756869, 458917,
-1596832, -25103633, -12990876, -7676928, -14666033 ]);
/// Precomputed value of one of the square roots of -1 (mod p) /// Precomputed value of one of the square roots of -1 (mod p)
pub const SQRT_M1: FieldElement = FieldElement([ pub const SQRT_M1: FieldElement = FieldElement([
@ -1520,6 +1523,13 @@ mod test {
assert_eq!(d2, constants::d2); assert_eq!(d2, constants::d2);
} }
#[test]
fn test_d4() {
let mut four = FieldElement::zero();
four[0] = 4;
assert_eq!(&constants::d * &four, constants::d4);
}
/// Test the values in the lookup table of precomputed multiples /// Test the values in the lookup table of precomputed multiples
/// of the basepoint. /// of the basepoint.
#[test] #[test]