BouncyCastle包用例

椭圆曲线test

import java.math.*;
import java.util.Scanner;

import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.math.ec.*;

public class testECC {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		BigInteger p = scan.nextBigInteger();
		BigInteger a = scan.nextBigInteger();
		BigInteger b = scan.nextBigInteger();
		BigInteger gx = scan.nextBigInteger();
		BigInteger gy = scan.nextBigInteger();
		BigInteger n = scan.nextBigInteger();
		BigInteger k = scan.nextBigInteger();
		ECCurve.Fp curve = new ECCurve.Fp(p, a, b);
		ECPoint G = curve.createPoint(gx,gy);
		ECDomainParameters ecc_para = new ECDomainParameters(curve,G,n);
		
		System.out.println(G.toString());  //十六机制坐标表示
		System.out.println(G.getXCoord().toBigInteger().toString(10)+" "+G.getYCoord().toBigInteger().toString(10));
		ECPoint point = G.multiply(k).normalize();  //normalize（）函数的作用是将其转化为仿射坐标系的坐标表示，单位向量为（1，1）
		System.out.println(point.getXCoord().toBigInteger().toString(10));
		point.normalize();
		System.out.println(point);
		
	}
}

Overview (Bouncy Castle Library 1.37 API Specification) (berkeley.edu)