Class ToolECDSA

security/src/main/java/pro/tools/security/ToolECDSA.java:36–231

ECDSA安全编码组件 @author SeanDragon

 * @author SeanDragon
 */
public final class ToolECDSA {
    private ToolECDSA() {
        throw new UnsupportedOperationException("我是工具类，别初始化我。。。");
    }

    /**
     * 数字签名 密钥算法
     */
    private static final String KEY_ALGORITHM = "ECDSA";

    /**
     * 数字签名 签名/验证算法
     * <p>
     * Bouncy Castle支持以下7种算法
     * NONEwithECDSA
     * RIPEMD160withECDSA
     * SHA1withECDSA
     * SHA224withECDSA
     * SHA256withECDSA
     * SHA384withECDSA
     * SHA512withECDSA
     */
    private static final String SIGNATURE_ALGORITHM = "SHA512withECDSA";

    /**
     * 公钥
     */
    private static final String PUBLIC_KEY = "ECDSAPublicKey";

    /**
     * 私钥
     */
    private static final String PRIVATE_KEY = "ECDSAPrivateKey";

    /**
     * 初始化密钥
     *
     * @return Map 密钥Map
     *
     * @throws Exception
     */
    public static Map<String, Object> initKey() throws NoSuchAlgorithmException, InvalidAlgorithmParameterException {
        // 加入BouncyCastleProvider支持
        Security.addProvider(new BouncyCastleProvider());

        BigInteger p = new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839");

        ECFieldFp ecFieldFp = new ECFieldFp(p);

        BigInteger a = new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16);

        BigInteger b = new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16);

        EllipticCurve ellipticCurve = new EllipticCurve(ecFieldFp, a, b);

        BigInteger x = new BigInteger("110282003749548856476348533541186204577905061504881242240149511594420911");

        BigInteger y = new BigInteger("869078407435509378747351873793058868500210384946040694651368759217025454");