Java生成SM2证书基于BouncyCastle(cer)

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【SM2证书】利用BC的X509v3CertificateBuilder组装X509国密证书

整理中。完全是Java代码调用BouncCastle生成的哦。先来个图看下 签名算法  和  公钥参数都是 符合SM2算法的

2018年6月22日更新:CRL分布点，添加证书策略，颁发者密钥标识，使用者密钥标识，密钥用法，增强密钥用法，基本约束

可以先加QQ 783021975 咨询相关问题。

2017年8月17日10:37:14 增加生成cer证书代码

       /**
     * 国密证书签名算法标识
     */
    private static String  SignAlgor = "1.2.156.10197.1.501";
        /**
     * 生成国密ROOT证书方法
     * @param pageCert.getCn()+","+
     * @throws Exception
     */
    public static void genSM2CertByRoot() throws Exception {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        org.bouncycastle.jce.provider.BouncyCastleProvider bouncyCastleProvider = new org.bouncycastle.jce.provider.BouncyCastleProvider();
        Security.addProvider(bouncyCastleProvider);
        //证书的名称
                String fileName = "root"+new Date().getTime()/1000;
        String path  = "保存的路径";
        String rootCertPath = path+fileName+".cer";
        try {
            KeyPair kp = KeyGenUtil.getKeyPair2SM2(path,fileName);//这块就是生成SM2公私钥对  https://zb.oschina.net/service/70e3fdaf699a724b
            System.out.println("=====公钥算法====="+kp.getPublic().getAlgorithm());
            BCECPrivateKey bcecPrivateKey = (BCECPrivateKey) kp.getPrivate();//使用ECPrivateKey  PrivateKey都可以
            BCECPublicKey bcecPublicKey = (BCECPublicKey) kp.getPublic();//使用ECPublicKey  PublicKey都可以
            //申请服务器证书信息  我是通过网页得到传递的参数 。如果测试 写死即可。这一步没有什么的。
            X500Principal principal = new X500Principal("CN=小帅丶博客,O=小帅丶博客");
            //X500Principal principal = new X500Principal("CN="+pageCert.getCn()+",O="+pageCert.getO());
            X509V3CertificateGenerator certGen = new X509V3CertificateGenerator();
            certGen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis()));
            certGen.setIssuerDN(principal);certGen.setNotBefore(new Date());
            certGen.setNotAfter(CertAuthAssist.getYearLater(5));
            certGen.setSubjectDN(principal);
            certGen.setSignatureAlgorithm(SignAlgor);
            certGen.setPublicKey(bcecPublicKey);
            //添加CRL分布点 QQ:783021975
        certGen.addExtension(Extension.cRLDistributionPoints, true, XSCertExtension.getCRLDIstPoint());
        //添加证书策略 QQ:783021975
        certGen.addExtension(Extension.certificatePolicies, true, new DERSequence(XSCertExtension.getPolicyInfo()));
        //颁发者密钥标识
        DigestCalculator calculator = new BcDigestCalculatorProvider().get(new AlgorithmIdentifier(OIWObjectIdentifiers.idSHA1));
        X509ExtensionUtils extensionUtils = new X509ExtensionUtils(calculator );
        certGen.addExtension(Extension.authorityKeyIdentifier, false, extensionUtils.createAuthorityKeyIdentifier(publicKeyInfo));
        //使用者密钥标识
        certGen.addExtension(Extension.subjectKeyIdentifier, false,extensionUtils.createSubjectKeyIdentifier(publicKeyInfo));
        //密钥用法 QQ:783021975
        certGen.addExtension(Extension.keyUsage,true,XSCertExtension.getKeyUsage());
        //增强密钥用法 QQ:783021975
        certGen.addExtension(Extension.extendedKeyUsage,true,XSCertExtension.getExtendKeyUsage());
        //基本约束
        BasicConstraints basicConstraints = new BasicConstraints(0);
        certGen.addExtension(Extension.basicConstraints, true, basicConstraints);
            X509Certificate rootCert = certGen.generateX509Certificate(bcecPrivateKey, "BC");
            FileOutputStream outputStream = new FileOutputStream(rootCertPath);
            outputStream.write(rootCert.getEncoded());outputStream.close();
            } catch (Exception e) {
                logger.info("======根证书申请失败"+e.getMessage());return null;
        }
}

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CertAuthAssist.getYearLater()方法：

/**
     * 计算当前时间的N年后
     * @param later 正整数
     * @return
     */
    public static Date getYearLater(int later) {
        Date date = new Date();
        try {
            Calendar calendar = Calendar.getInstance();
            calendar.add(Calendar.YEAR,later);
            date = calendar.getTime();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        return date;
    }

本项目支持  

1.生成RSA算法cer证书

2.SM2算法cer证书。

3.生成根证书。子证书。三级证书

4.字符串公私钥转 公私钥对象 支持SM2算法

需要用到的BC包

    <!-- https://mvnrepository.com/artifact/org.bouncycastle/bcpkix-jdk15on -->  
             <dependency>  
                <groupId>org.bouncycastle</groupId>  
                <artifactId>bcpkix-jdk15on</artifactId>  
                <version>1.57</version>  
            </dependency>   
            <!-- https://mvnrepository.com/artifact/org.bouncycastle/bcmail-jdk16 -->  
            <dependency>  
                <groupId>org.bouncycastle</groupId>  
                <artifactId>bcmail-jdk15on</artifactId>  
                <version>1.56</version>  
            </dependency>  

模块说明