由于等保和多個系統(tǒng)間的數(shù)據(jù)傳輸加密, 寫了一個共有的前端與后端, 后端與后端,的通用算法SM2簡單加密,? 不需要驗簽, 幾行代碼搞定.?

引包, 測試好幾遍, 這個包適合jdk1.8使用

1、后端代碼示例

引包,

        <dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk18on</artifactId>
            <version>1.72</version>
        </dependency>

沒有意外就應該直接能用下面代碼了

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 org.junit.Test;

import java.math.BigInteger;
import java.security.*;
import java.security.spec.ECGenParameterSpec;


/**
 * 簡單的sm2
 */
public class SimpSM2Util {

    /**
     * SM2加密算法
     * @param publicKey     公鑰
     * @param data          明文數(shù)據(jù)
     * @return
     */
    public static String encrypt(String publicKey, String data) {
        // 獲取一條SM2曲線參數(shù)
        X9ECParameters sm2ECParameters = GMNamedCurves.getByName("sm2p256v1");
        // 構造ECC算法參數(shù)，曲線方程、橢圓曲線G點、大整數(shù)N
        ECDomainParameters domainParameters = new ECDomainParameters(sm2ECParameters.getCurve(), sm2ECParameters.getG(), sm2ECParameters.getN());
        //提取公鑰點
        ECPoint pukPoint = sm2ECParameters.getCurve().decodePoint(Hex.decode(publicKey));
        // 公鑰前面的02或者03表示是壓縮公鑰，04表示未壓縮公鑰, 04的時候，可以去掉前面的04
        ECPublicKeyParameters publicKeyParameters = new ECPublicKeyParameters(pukPoint, domainParameters);

        SM2Engine sm2Engine = new SM2Engine(SM2Engine.Mode.C1C3C2);
        // 設置sm2為加密模式
        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加密時出現(xiàn)異常:"+e.getMessage());
        }
        return Hex.toHexString(arrayOfBytes);

    }

    /**
     * SM2解密算法
     * @param privateKey        私鑰
     * @param cipherData        密文數(shù)據(jù)
     * @return
     */
    public static String decrypt(String privateKey, String cipherData) {
        // 使用BC庫加解密時密文以04開頭，傳入的密文前面沒有04則補上
        if (!cipherData.startsWith("04")){
            cipherData = "04" + cipherData;
        }
        byte[] cipherDataByte = Hex.decode(cipherData);
        BigInteger privateKeyD = new BigInteger(privateKey, 16);
        //獲取一條SM2曲線參數(shù)
        X9ECParameters sm2ECParameters = GMNamedCurves.getByName("sm2p256v1");
        //構造domain參數(shù)
        ECDomainParameters domainParameters = new ECDomainParameters(sm2ECParameters.getCurve(), sm2ECParameters.getG(), sm2ECParameters.getN());
        ECPrivateKeyParameters privateKeyParameters = new ECPrivateKeyParameters(privateKeyD, domainParameters);

        SM2Engine sm2Engine = new SM2Engine(SM2Engine.Mode.C1C3C2);
        // 設置sm2為解密模式
        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解密時出現(xiàn)異常:"+e.getMessage());
        }
        return result;
    }

    /*@Test  
    // 生成密鑰
    public void createKey() throws Exception{
        //String M="encryption standard111111111111111111111111111111";
        SimpSM2Util sm2 = new SimpSM2Util();
        ECGenParameterSpec sm2Spec = new ECGenParameterSpec("sm2p256v1");
        // 獲取一個橢圓曲線類型的密鑰對生成器
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC", new BouncyCastleProvider());
        // 使用SM2參數(shù)初始化生成器
        kpg.initialize(sm2Spec);
        // 獲取密鑰對
        KeyPair keyPair = kpg.generateKeyPair();
        PublicKey publicKey = keyPair.getPublic();
        BCECPublicKey p=(BCECPublicKey)publicKey;
        System.out.println("publicKey："+Hex.toHexString(p.getQ().getEncoded(false)));

        PrivateKey privateKey = keyPair.getPrivate();
        BCECPrivateKey s=(BCECPrivateKey)privateKey;
        System.out.println("privateKey："+Hex.toHexString(s.getD().toByteArray()));

    }*/
}

? ? publicKey：04aa909915f87880507e3de515220cc8f82b1c5693f56a0475b3b48ff7448c229734cd724e603000dd78569faa9fbc1eeb93a6d836190a0ee734e2d9e74d804f28
? ? privateKey：00a684d832831d5371d2ff9de6a021a33fb396451e74e0ffe0d415c298b36876fe

加密:? SimpSM2Util.encrypt("共有密鑰", "明文");?

解密:? SimpSM2Util.decrypt("私有密鑰", "密文");

后端代碼使用一個工具類, 可參考

import org.bouncycastle.crypto.engines.SM2Engine;

/**
 * 簡單單例SM2加解密, 配合前端
 */
public class LoSM2 {

    private static String ECNameModel = "sm2p256v1";
    private static SM2Engine.Mode CipherMode = SM2Engine.Mode.C1C3C2;
    private final String privateKey;
    private final String publicKey;

    private LoSM2(String privateKey, String publicKey){
        this.privateKey = privateKey;
        this.publicKey = publicKey;
    }

    private volatile static LoSM2 instance = null;

    public static LoSM2 getInstance(){
        if(instance == null){
            throw new RuntimeException("請InitKey初始化密鑰!!!");
        }
        return instance;
    }

    /**
     * SM2初始密鑰(私鑰,公鑰)
     * @param privateKey
     * @param publicKey
     * @return
     */
    public static LoSM2 InitKey(String privateKey, String publicKey) {
        if(instance == null){
            synchronized(LoSM2.class){
                if(instance == null){
                    instance = new LoSM2(privateKey, publicKey);
                }
            }
        }
        return instance;
    }

    private static class SM2SimpSelfLoader {
        private static final LoSM2 instance = InitKey("", "");
    }

    private static boolean IsInitKey(){
        if(instance == null) {
            throw new RuntimeException("請InitKey初始化密鑰!!!");
        }else {
            return true;
        }
    }

    /**
     * SM2加密
     * @param cleartext          明文數(shù)據(jù)
     */
    public String encrypt(String cleartext) {
        if(!IsInitKey())
            return "";
        return SimpSM2Util.encrypt(instance.publicKey, cleartext);        
    }

    /**
     * SM2解密
     * @param cipherData        密文數(shù)據(jù)
     */
    public static String decrypt(String cipherData) {
        if(!IsInitKey())
            return "";
        return SimpSM2Util.decrypt(instance.privateKey, cipherData);
    }

}

2、前端代碼示例

安裝sm-crypto包:? ?npm install --save?sm-crypto

前端加解密更簡單,? 引包后就能用

let txt='簡單加密不要驗簽'  //要加密的字段
const sm2 = require('sm-crypto').sm2
const cipherMode = 1;// 1 - C1C3C2，0 - C1C2C3，默認為1
var publicKey =  "04aa909915f87880507e3de515220cc8f82b1c5693f56a0475b3b48ff7448c229734cd724e603000dd78569faa9fbc1eeb93a6d836190a0ee734e2d9e74d804f28";
// 加密結果            
let encryptData = sm2.doEncrypt(txt, publicKey, cipherMode);
// 解密
sm2.doDecrypt(txt, privateKey, cipherMode);

適合簡單的傳輸加密

3、避坑指南

在引用?bcprov-jdk18on 包的時候, 有可能存在版本沖突, 或本地安全問題,? 這個是我在返回切換工程遇到的問題?

可以嘗試把?bcprov-jdk18on-1.72.jar 加入mvn的import的sdks里面

還可以試試?mvn idea:module

或者試試? mvn: idea:idea文章來源地址http://www.zghlxwxcb.cn/news/detail-592598.html

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