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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build amd64 || arm64 || ppc64le || s390x

package nistec

import (
	"fmt"
	"testing"
)

func TestP256PrecomputedTable(t *testing.T) {
	base := NewP256Point().SetGenerator()

for i := 0; i < 43; i++ {
		t.Run(fmt.Sprintf("table[%d]", i), func(t *testing.T) {
			testP256AffineTable(t, base, &p256Precomputed[i])
		})

for k := 0; k < 6; k++ {
			base.Double(base)
		}
	}
}

func testP256AffineTable(t *testing.T, base *P256Point, table *p256AffineTable) {
	p := NewP256Point()
	zInv := new(p256Element)
	zInvSq := new(p256Element)

for j := 0; j < 32; j++ {
		p.Add(p, base)

// Convert p to affine coordinates.
		p256Inverse(zInv, &p.z)
		p256Sqr(zInvSq, zInv, 1)
		p256Mul(zInv, zInv, zInvSq)

p256Mul(&p.x, &p.x, zInvSq)
		p256Mul(&p.y, &p.y, zInv)
		p.z = p256One

if p256Equal(&table[j].x, &p.x) != 1 || p256Equal(&table[j].y, &p.y) != 1 {
			t.Fatalf("incorrect table entry at index %d", j)
		}
	}
}

Batal

⬅ internal 19 item

Nama	Tipe	Ukuran	Diubah	Aksi
📁fiat	dir	—	2024-02-02 18:09	📂 Buka
🔵generate.go	go	19.7 KB	2024-02-02 18:09	✏️ 👁️
🔵nistec.go	go	699 B	2024-02-02 18:09	✏️ 👁️
🔵nistec_test.go	go	8.4 KB	2024-02-02 18:09	✏️ 👁️
🔵p224.go	go	15.9 KB	2024-02-02 18:09	✏️ 👁️
🔵p224_sqrt.go	go	3.1 KB	2024-02-02 18:09	✏️ 👁️
🔵p256.go	go	17.2 KB	2024-02-02 18:09	✏️ 👁️
🔵p256_asm.go	go	21.4 KB	2024-02-02 18:09	✏️ 👁️
📄p256_asm_amd64.s	s	39.8 KB	2024-02-02 18:09	✏️ 👁️
📄p256_asm_arm64.s	s	29.7 KB	2024-02-02 18:09	✏️ 👁️
📄p256_asm_ppc64le.s	s	56.5 KB	2024-02-02 18:09	✏️ 👁️
📄p256_asm_s390x.s	s	55.3 KB	2024-02-02 18:09	✏️ 👁️
📄p256_asm_table.bin	bin	86 KB	2024-02-02 18:09	✏️ 👁️
🔵p256_asm_table_test.go	go	1.1 KB	2024-02-02 18:09	✏️ 👁️
🔵p256_ordinv.go	go	3 KB	2024-02-02 18:09	✏️ 👁️
🔵p256_ordinv_noasm.go	go	313 B	2024-02-02 18:09	✏️ 👁️
🔵p256_ordinv_test.go	go	2.2 KB	2024-02-02 18:09	✏️ 👁️
🔵p384.go	go	18 KB	2024-02-02 18:09	✏️ 👁️
🔵p521.go	go	17 KB	2024-02-02 18:09	✏️ 👁️

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