Commit a14352b0b24b295e1857f306de5877680dd80d2b | zig

Implemented `neg()` method for `AffineCoordinates` struct of p256,
p384 and secp256k1 curves.

Resolves: #20505 (partially)

3 files changed, 12 insertions(+), 0 deletions(-)

lib/std/crypto/pcurves/p256.zig+4

...	...	@@ -471,6 +471,10 @@ pub const AffineCoordinates = struct {
471	471	/// Identity element in affine coordinates.
472	472	pub const identityElement = AffineCoordinates{ .x = P256.identityElement.x, .y = P256.identityElement.y };
473	473
	474	pub fn neg(p: AffineCoordinates) AffineCoordinates {
	475	return .{ .x = p.x, .y = p.y.neg() };
	476	}
	477
474	478	fn cMov(p: *AffineCoordinates, a: AffineCoordinates, c: u1) void {
475	479	p.x.cMov(a.x, c);
476	480	p.y.cMov(a.y, c);

lib/std/crypto/pcurves/p384.zig+4

...	...	@@ -471,6 +471,10 @@ pub const AffineCoordinates = struct {
471	471	/// Identity element in affine coordinates.
472	472	pub const identityElement = AffineCoordinates{ .x = P384.identityElement.x, .y = P384.identityElement.y };
473	473
	474	pub fn neg(p: AffineCoordinates) AffineCoordinates {
	475	return .{ .x = p.x, .y = p.y.neg() };
	476	}
	477
474	478	fn cMov(p: *AffineCoordinates, a: AffineCoordinates, c: u1) void {
475	479	p.x.cMov(a.x, c);
476	480	p.y.cMov(a.y, c);

lib/std/crypto/pcurves/secp256k1.zig+4

...	...	@@ -549,6 +549,10 @@ pub const AffineCoordinates = struct {
549	549	/// Identity element in affine coordinates.
550	550	pub const identityElement = AffineCoordinates{ .x = Secp256k1.identityElement.x, .y = Secp256k1.identityElement.y };
551	551
	552	pub fn neg(p: AffineCoordinates) AffineCoordinates {
	553	return .{ .x = p.x, .y = p.y.neg() };
	554	}
	555
552	556	fn cMov(p: *AffineCoordinates, a: AffineCoordinates, c: u1) void {
553	557	p.x.cMov(a.x, c);
554	558	p.y.cMov(a.y, c);