Java BC包做sm2加密方法 ，签名验签方法

package com.sdyy.common.bc_sm2;


import org.bouncycastle.jcajce.provider.asymmetric.x509.CertificateFactory;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Base64;
import org.bouncycastle.util.encoders.Hex;


import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.nio.charset.StandardCharsets;
import java.security.*;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Enumeration;

/**
 * @创建人 
 * @创建时间 2020/5/7
 * @描述
 */
public class BcUtils {
//    private static String sm2PfxLocation = ConfigService.getConfig("SM2_PFX_LOCATION");
    private static String certStr = "MIIBszCCAV6gAwIBAgIGAWEmMrj+MAwGCCqBHM9VAYN1BQAwHzELMAkGA1UEBhMC\n" +
        "Q04xEDAOBgNVBAMTB0F1dG9DQUQwHhcNMTgwMTI0MDMyNTEyWhcNMzUwODA1MTYw\n"；
    public static void main(String[] args) throws Exception{
        String orgData = "123123123";//要签名的数据
        String algorithm = "SM3withSM2";
        String yqData = "123123123";//要签名的数据
        String pfxFile = "D:/ESM.pfx";//sm2证书对应的pfx
        String password = "111111"; //pfx访问密码
        Security.addProvider(new BouncyCastleProvider());
        FileInputStream fis = new FileInputStream(pfxFile);
        KeyStore ks2 = KeyStore.getInstance("PKCS12", "BC");
        ks2.load(fis, password.toCharArray());
        Enumeration enum1 = ks2.aliases();
        String keyAlias = null;
        if (enum1.hasMoreElements())
        {
            keyAlias = (String)enum1.nextElement();
        }
        Signature sig = Signature.getInstance(algorithm, "BC");
        sig.initSign((PrivateKey) ks2.getKey(keyAlias, null), new SecureRandom());
        sig.update(orgData.getBytes());
        byte[] rs = sig.sign();
        String str = Hex.toHexString(rs);
        System.out.println(str);
        //验证签名
        sm2VerifySignedData(rs,certStr,yqData);
    }
    /**
     *sm2对签名后的数据进行验签
     * @param rs 签名产生签名值
     * @param certKey 证书串，及公钥
     * @param signValue 签名原文
     * @return
     */
    public static void sm2VerifySignedData(byte[] rs,String certKey,String signValue){
        try {
           CertificateFactory factory = new CertificateFactory();
           X509Certificate certificate = (X509Certificate) factory.engineGenerateCertificate(new ByteArrayInputStream(Base64.decode(certKey)));
           System.out.println(certificate.getSigAlgName());
            // 验证签名
           Signature signature = Signature.getInstance(certificate.getSigAlgName(), new BouncyCastleProvider());
           signature.initVerify(certificate);
           signature.update(signValue.getBytes(StandardCharsets.UTF_8));
           System.out.println(signature.verify(rs));
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    //bc包sm2签名

    /**
     * bc包sm2签名
     * @param data 待签数据
     * @param pfxFile pfx文件地址（sm2证书对应的pfx）
     * @param password pfx访问密码
     * @return 签名值
     */
    public static byte[] sm2SignData(String data,String pfxFile,String password){
        try {
            String algorithm = "SM3withSM2";
            Security.addProvider(new BouncyCastleProvider());
            FileInputStream fis = new FileInputStream(pfxFile);
            KeyStore ks2 = KeyStore.getInstance("PKCS12", "BC");
            ks2.load(fis, password.toCharArray());
            Enumeration enum1 = ks2.aliases();
            String keyAlias = null;
            if (enum1.hasMoreElements())
            {
                keyAlias = (String)enum1.nextElement();
            }
            Signature sig = Signature.getInstance(algorithm, "BC");
            sig.initSign((PrivateKey) ks2.getKey(keyAlias, null), new SecureRandom());
            sig.update(data.getBytes());
            byte[] rs = sig.sign();
            String str = Hex.toHexString(rs);
            System.out.println(str);
            return rs;
        }catch (Exception e){
            e.printStackTrace();
        }
        return null;
    }
}