sm2加密 后端代码好说,主要是前端js加密代码,困扰了很长时间,在此记录一下。
先看下后端代码
maven引入:
<dependency>
<groupId>org.bouncycastlegroupId>
<artifactId>bcprov-jdk15onartifactId>
<version>1.70version>
dependency>
工具类(从别处引荐的轮子)
import org.bouncycastle.asn1.gm.GMNamedCurves;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
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.jce.spec.ECParameterSpec;
import org.bouncycastle.jce.spec.ECPrivateKeySpec;
import org.bouncycastle.jce.spec.ECPublicKeySpec;
import org.bouncycastle.util.encoders.Hex;
import java.math.BigInteger;
import java.security.*;
import java.security.spec.ECGenParameterSpec;
/**
* @ClassName SM2Utils
* @Description SM2算法工具类
* @Author pxd
* @Version 1.0
*/
class SM2Utils {
/**
* @Description 生成秘钥对
* @Author pxd
* @return KeyPair
*/
public static KeyPair createECKeyPair() {
//使用标准名称创建EC参数生成的参数规范
final ECGenParameterSpec sm2Spec = new ECGenParameterSpec("sm2p256v1");
// 获取一个椭圆曲线类型的密钥对生成器
final KeyPairGenerator kpg;
try {
kpg = KeyPairGenerator.getInstance("EC", new BouncyCastleProvider());
// 使用SM2算法域参数集初始化密钥生成器(默认使用以最高优先级安装的提供者的 SecureRandom 的实现作为随机源)
// kpg.initialize(sm2Spec);
// 使用SM2的算法域参数集和指定的随机源初始化密钥生成器
kpg.initialize(sm2Spec, new SecureRandom());
// 通过密钥生成器生成密钥对
return kpg.generateKeyPair();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* @Description 公钥加密
* @Author pxd
* @param publicKeyHex SM2十六进制公钥
* @param data 明文数据
* @return String
*/
public static String encrypt(String publicKeyHex, String data) {
return encrypt(getECPublicKeyByPublicKeyHex(publicKeyHex), data, 1);
}
/**
* @Description 公钥加密
* @Author pxd
* @param publicKey SM2公钥
* @param data 明文数据
* @param modeType 加密模式
* @return String
*/
public static String encrypt(BCECPublicKey publicKey, String data, int modeType) {
//加密模式
SM2Engine.Mode mode = SM2Engine.Mode.C1C3C2;
if (modeType != 1) {
mode = SM2Engine.Mode.C1C2C3;
}
//通过公钥对象获取公钥的基本域参数。
ECParameterSpec ecParameterSpec = publicKey.getParameters();
ECDomainParameters ecDomainParameters = new ECDomainParameters(ecParameterSpec.getCurve(),
ecParameterSpec.getG(), ecParameterSpec.getN());
//通过公钥值和公钥基本参数创建公钥参数对象
ECPublicKeyParameters ecPublicKeyParameters = new ECPublicKeyParameters(publicKey.getQ(), ecDomainParameters);
//根据加密模式实例化SM2公钥加密引擎
SM2Engine sm2Engine = new SM2Engine(mode);
//初始化加密引擎
sm2Engine.init(true, new ParametersWithRandom(ecPublicKeyParameters, new SecureRandom()));
byte[] arrayOfBytes = null;
try {
//将明文字符串转换为指定编码的字节串
byte[] in = data.getBytes("utf-8");
//通过加密引擎对字节数串行加密
arrayOfBytes = sm2Engine.processBlock(in, 0, in.length);
} catch (Exception e) {
System.out.println("SM2加密时出现异常:" + e.getMessage());
e.printStackTrace();
}
//将加密后的字节串转换为十六进制字符串
return Hex.toHexString(arrayOfBytes);
}
/**
* @Description 私钥解密
* @Author pxd
* @param privateKeyHex SM2十六进制私钥
* @param cipherData 密文数据
* @return String
*/
public static String decrypt(String privateKeyHex, String cipherData) {
return decrypt(getBCECPrivateKeyByPrivateKeyHex(privateKeyHex), cipherData, 1);
}
/**
* @Description 私钥解密
* @Author pxd
* @param privateKey SM私钥
* @param cipherData 密文数据
* @param modeType 解密模式
* @return
*/
public static String decrypt(BCECPrivateKey privateKey, String cipherData, int modeType) {
//解密模式
SM2Engine.Mode mode = SM2Engine.Mode.C1C3C2;
if (modeType != 1)
mode = SM2Engine.Mode.C1C2C3;
//将十六进制字符串密文转换为字节数组(需要与加密一致,加密是:加密后的字节数组转换为了十六进制字符串)
byte[] cipherDataByte = Hex.decode(cipherData);
//通过私钥对象获取私钥的基本域参数。
ECParameterSpec ecParameterSpec = privateKey.getParameters();
ECDomainParameters ecDomainParameters = new ECDomainParameters(ecParameterSpec.getCurve(),
ecParameterSpec.getG(), ecParameterSpec.getN());
//通过私钥值和私钥钥基本参数创建私钥参数对象
ECPrivateKeyParameters ecPrivateKeyParameters = new ECPrivateKeyParameters(privateKey.getD(),
ecDomainParameters);
//通过解密模式创建解密引擎并初始化
SM2Engine sm2Engine = new SM2Engine(mode);
sm2Engine.init(false, ecPrivateKeyParameters);
String result = null;
try {
//通过解密引擎对密文字节串进行解密
byte[] arrayOfBytes = sm2Engine.processBlock(cipherDataByte, 0, cipherDataByte.length);
//将解密后的字节串转换为utf8字符编码的字符串(需要与明文加密时字符串转换成字节串所指定的字符编码保持一致)
result = new String(arrayOfBytes, "utf-8");
} catch (Exception e) {
System.out.println("SM2解密时出现异常" + e.getMessage());
}
return result;
}
//椭圆曲线ECParameters ASN.1 结构
private static X9ECParameters x9ECParameters = GMNamedCurves.getByName("sm2p256v1");
//椭圆曲线公钥或私钥的基本域参数。
private static ECParameterSpec ecDomainParameters = new ECParameterSpec(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN());
/**
* @Description 公钥字符串转换为 BCECPublicKey 公钥对象
* @Author pxd
* @param pubKeyHex 64字节十六进制公钥字符串(如果公钥字符串为65字节首个字节为0x04:表示该公钥为非压缩格式,操作时需要删除)
* @return BCECPublicKey SM2公钥对象
*/
public static BCECPublicKey getECPublicKeyByPublicKeyHex(String pubKeyHex) {
//截取64字节有效的SM2公钥(如果公钥首个字节为0x04)
if (pubKeyHex.length() > 128) {
pubKeyHex = pubKeyHex.substring(pubKeyHex.length() - 128);
}
//将公钥拆分为x,y分量(各32字节)
String stringX = pubKeyHex.substring(0, 64);
String stringY = pubKeyHex.substring(stringX.length());
//将公钥x、y分量转换为BigInteger类型
BigInteger x = new BigInteger(stringX, 16);
BigInteger y = new BigInteger(stringY, 16);
//通过公钥x、y分量创建椭圆曲线公钥规范
ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(x9ECParameters.getCurve().createPoint(x, y), ecDomainParameters);
//通过椭圆曲线公钥规范,创建出椭圆曲线公钥对象(可用于SM2加密及验签)
return new BCECPublicKey("EC", ecPublicKeySpec, BouncyCastleProvider.CONFIGURATION);
}
/**
* @Description 私钥字符串转换为 BCECPrivateKey 私钥对象
* @Author pxd
* @param privateKeyHex 32字节十六进制私钥字符串
* @return BCECPrivateKey SM2私钥对象
*/
public static BCECPrivateKey getBCECPrivateKeyByPrivateKeyHex(String privateKeyHex) {
//将十六进制私钥字符串转换为BigInteger对象
BigInteger d = new BigInteger(privateKeyHex, 16);
//通过私钥和私钥域参数集创建椭圆曲线私钥规范
ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(d, ecDomainParameters);
//通过椭圆曲线私钥规范,创建出椭圆曲线私钥对象(可用于SM2解密和签名)
return new BCECPrivateKey("EC", ecPrivateKeySpec, BouncyCastleProvider.CONFIGURATION);
}
public static void main(String[] args) {
String publicKeyHex = "04ff3b41a0ba4bc06b0636645ebdba6d643e7baa61a54aaf75abeb6e242cdd8bfe91b6d8ae77c70e7b251fe26b71e672eca4a935d58e89fdb86f4a51bbc50d5e38";
String privateKeyHex = "d26ce8f1a1c31c62a8feef696524c57e8c40a6a22d4dd08d0ca8f7acb16d77cc";
/* KeyPair keyPair = createECKeyPair();
PublicKey publicKey = keyPair.getPublic();
if (publicKey instanceof BCECPublicKey) {
//获取65字节非压缩缩的十六进制公钥串(0x04)
publicKeyHex = Hex.toHexString(((BCECPublicKey) publicKey).getQ().getEncoded(false));
System.out.println("---->SM2公钥:" + publicKeyHex);
}
PrivateKey privateKey = keyPair.getPrivate();
if (privateKey instanceof BCECPrivateKey) {
//获取32字节十六进制私钥串
privateKeyHex = ((BCECPrivateKey) privateKey).getD().toString(16);
System.out.println("---->SM2私钥:" + privateKeyHex);
}*/
/**
* 公钥加密
*/
String data = "000000";
//将十六进制公钥串转换为 BCECPublicKey 公钥对象
String encryptData = encrypt(publicKeyHex, data);
System.out.println("---->加密结果:" + encryptData);
/**
* 私钥解密
*/
//将十六进制私钥串转换为 BCECPrivateKey 私钥对象
data = decrypt(privateKeyHex, "0425ebe06a2e987037a80b2f5c1a606069dfa949eddaf45c30955150adf11258fd2ad67bc5894c8c8544f73dbe543331a6f376a2c03d42f83c6d6822a74374523dd5506f63ddd5247c98d3d6a66f57066f4473819b664231d48fb53d3b62098a92f9abb1c91dd1");
System.out.println("---->解密结果:" + data);
}
}
js代码(两个文件)
crypto-js.js
sm2.js
下面链接获取,太长 没法直接粘。。。
https://download.csdn.net/download/qq_44985319/87721316
使用
// 最后一个参数 1 c1c3c2 0 c1c2c3 需与后端解密时传参对应
var a=sm2Encrypt("需要加密的内容","前两位带着04的公钥",1);