建设公司网站怎么弄,北京软件编程培训机构,ok卡怎么在京东网上商城,网上商城网站建设方案书目录 一、SM2国密加解密算法1.1、pom文件引入依赖包1.2、SM2加解密工具类1.3、测试类 一、SM2国密加解密算法
1.1、pom文件引入依赖包 dependencygroupIdorg.bouncycastle/groupIdartifactIdbcprov-jdk18on/artifactIdversiondependencygroupIdorg.bouncycastle/groupIdartifactIdbcprov-jdk18on/artifactIdversion1.72/version/dependency1.2、SM2加解密工具类 SM2加解密工具类 package com.xz.utils;
import org.bouncycastle.asn1.gm.GMNamedCurves;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.params.*;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPrivateKey;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPublicKey;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.util.encoders.Hex;import java.math.BigInteger;
import java.security.*;
import java.security.spec.ECGenParameterSpec;
import java.util.HashMap;
import java.util.Map;/*** 适用于前后端公用的SM2秘钥生成、加解密工具类*/
public class SimpSM2Util {/*** 公钥常量*/public static final String KEY_PUBLIC_KEY publicKey;/*** 私钥返回值常量*/public static final String KEY_PRIVATE_KEY privateKey;/*** SM2加密算法* param publicKey 公钥* param data 明文数据* return*/public static String encrypt(String publicKey, String data) {// 获取一条SM2曲线参数X9ECParameters sm2ECParameters GMNamedCurves.getByName(sm2p256v1);// 构造ECC算法参数曲线方程、椭圆曲线G点、大整数NECDomainParameters domainParameters new ECDomainParameters(sm2ECParameters.getCurve(), sm2ECParameters.getG(), sm2ECParameters.getN());//提取公钥点ECPoint pukPoint sm2ECParameters.getCurve().decodePoint(Hex.decode(publicKey));// 公钥前面的02或者03表示是压缩公钥04表示未压缩公钥, 04的时候可以去掉前面的04ECPublicKeyParameters publicKeyParameters new ECPublicKeyParameters(pukPoint, domainParameters);SM2Engine sm2Engine new SM2Engine(SM2Engine.Mode.C1C3C2);// 设置sm2为加密模式sm2Engine.init(true, new ParametersWithRandom(publicKeyParameters, new SecureRandom()));byte[] arrayOfBytes null;try {byte[] in data.getBytes();arrayOfBytes sm2Engine.processBlock(in, 0, in.length);} catch (Exception e) {System.out.println(SM2加密时出现异常:e.getMessage());}return Hex.toHexString(arrayOfBytes);}/*** SM2解密算法* param privateKey 私钥* param cipherData 密文数据* return*/public static String decrypt(String privateKey, String cipherData) {// 使用BC库加解密时密文以04开头传入的密文前面没有04则补上if (!cipherData.startsWith(04)){cipherData 04 cipherData;}byte[] cipherDataByte Hex.decode(cipherData);BigInteger privateKeyD new BigInteger(privateKey, 16);//获取一条SM2曲线参数X9ECParameters sm2ECParameters GMNamedCurves.getByName(sm2p256v1);//构造domain参数ECDomainParameters domainParameters new ECDomainParameters(sm2ECParameters.getCurve(), sm2ECParameters.getG(), sm2ECParameters.getN());ECPrivateKeyParameters privateKeyParameters new ECPrivateKeyParameters(privateKeyD, domainParameters);SM2Engine sm2Engine new SM2Engine(SM2Engine.Mode.C1C3C2);// 设置sm2为解密模式sm2Engine.init(false, privateKeyParameters);String result ;try {byte[] arrayOfBytes sm2Engine.processBlock(cipherDataByte, 0, cipherDataByte.length);return new String(arrayOfBytes);} catch (Exception e) {System.out.println(SM2解密时出现异常:e.getMessage());}return result;}/*** 生成密钥*/public static MapString, String createKey() throws Exception{ECGenParameterSpec sm2Spec new ECGenParameterSpec(sm2p256v1);// 获取一个椭圆曲线类型的密钥对生成器KeyPairGenerator kpg KeyPairGenerator.getInstance(EC, new BouncyCastleProvider());// 使用SM2参数初始化生成器kpg.initialize(sm2Spec);// 获取密钥对KeyPair keyPair kpg.generateKeyPair();PublicKey publicKey keyPair.getPublic();BCECPublicKey p(BCECPublicKey)publicKey;System.out.println(publicKeyHex.toHexString(p.getQ().getEncoded(false)));PrivateKey privateKey keyPair.getPrivate();BCECPrivateKey s(BCECPrivateKey)privateKey;System.out.println(privateKeyHex.toHexString(s.getD().toByteArray()));MapString, String result new HashMap();result.put(KEY_PUBLIC_KEY, Hex.toHexString(p.getQ().getEncoded(false)));result.put(KEY_PRIVATE_KEY, Hex.toHexString(s.getD().toByteArray()));return result;}}1.3、测试类 测试类 public static void main(String[] args) throws Exception {MapString, String key createKey();String publicKey key.get(KEY_PUBLIC_KEY);System.out.println(公钥publicKey);String privateKey key.get(KEY_PRIVATE_KEY);System.out.println(私钥privateKey);String strhello java123456;System.out.println(加密前结果str);String encrypt encrypt(publicKey, str);System.out.println(加密后结果encrypt);String decrypt decrypt(privateKey, encrypt);System.out.println(解密后结果decrypt);
}测试结果如下图所示
