secp256r1.java

java写的椭圆曲线加密(ECC)算法源码

package ecc.elliptic;
import java.math.BigInteger;
public class secp256r1 implements ECParameters {
    private static final BigInteger p 
	= new BigInteger("FFFFFFFF"+"00000001"+"00000000"+"00000000"+
			 "00000000"+"FFFFFFFF"+"FFFFFFFF"+"FFFFFFFF", 16);
    
    private static final BigInteger a 
	= new BigInteger("FFFFFFFF"+"00000001"+"00000000"+"00000000"+
			 "00000000"+"FFFFFFFF"+"FFFFFFFF"+"FFFFFFFC", 16);
    
    private static final BigInteger b 
	= new BigInteger("5AC635D8"+"AA3A93E7"+"B3EBBD55"+"769886BC"+
			 "651D06B0"+"CC53B0F6"+"3BCE3C3E"+"27D2604B", 16);
    
    private static final BigInteger S 
	= new BigInteger("C49D3608"+"86E70493"+"6A6678E1"+"139D26B7"+
			 "819F7E90", 16);
    
    private static final BigInteger gx
	= new BigInteger("6B17D1F2"+"E12C4247"+"F8BCE6E5"+"63A440F2"+
			 "77037D81"+"2DEB33A0"+"F4A13945"+"D898C296", 16);

    private static final BigInteger gy
	= new BigInteger("4FE342E2"+"FE1A7F9B"+"8EE7EB4A"+"7C0F9E16"+
			 "2BCE3357"+"6B315ECE"+"CBB64068"+"37BF51F5", 16);
    
    private static final BigInteger n
	= new BigInteger("FFFFFFFF"+"00000000"+"FFFFFFFF"+"FFFFFFFF"+
			 "BCE6FAAD"+"A7179E84"+"F3B9CAC2"+"FC632551", 16);
    
    public BigInteger a() {
	return a;
    }

    public BigInteger b() {
	return b;
    }

    public BigInteger p() {
	return p;
    }

    public BigInteger generatorX() {
	return gx;
    }

    public BigInteger generatorY() {
	return gy;
    }

    public BigInteger order() {
	return n;
    }

    public String toString(){
	return "secp256r1";
    }

    public static void main(String[] args) {
	System.out.println("a:  "+a);
	System.out.println("b:  "+b);
	System.out.println("p:  "+p);
	System.out.println("gx: "+gx);
	System.out.println("gy: "+gy);
	System.out.println("n:  "+n);
	System.out.println("p.toByteArray().length: "+p.toByteArray().length);
    }
}