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ssl连接工具类

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文章字数：632,阅读全文大约需要2分钟

该工具类主要收集了研究ssl连接时用到的相关知识点

主要内容

  1. 通过证书创建keystore
  2. 从keystore中取证书
  3. 通过证书、keystore等多种方式创建SSLSocketFactory
  4. 单向认证、双向认证
  5. 通过证书链创建SSLSocketFactory
  6. 通过trustStore验证证书及证书链
    …

代码

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import lombok.extern.slf4j.Slf4j;
import javax.net.ssl.*;
import java.io.*;
import java.net.Socket;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.security.KeyFactory;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.SecureRandom;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.security.spec.PKCS8EncodedKeySpec;

/***
 * ssl工具类
 * 
 * @author colin.cheng
 * @date 2021-02-03 14:39
 * @since 1.0.0
 */
@Slf4j
public class SslUtil {

    /**
     * 读取x509格式的证书
     * 
     * @param certPath
     * @return
     * @throws FileNotFoundException
     * @throws CertificateException
     */
    public static X509Certificate getX509Certificate(String certPath) throws Exception {
        try (InputStream inStream = new FileInputStream(certPath)) {
            return getX509Certificate(inStream);
        }
    }

    /**
     * 通过输入流获取证书
     * 
     * @param inStream
     * @return
     * @throws Exception
     */
    public static X509Certificate getX509Certificate(InputStream inStream) throws Exception {
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        X509Certificate caCert = (X509Certificate)cf.generateCertificate(inStream);
        return caCert;
    }

    /**
     * 从keystore中获取证书
     * 
     * @param keyStorePath keystore位置
     * @param keyStorePwd keyStore密码
     * @param keyStoreType keyStore类型
     * @param alias 证书存储的别名
     * @return
     * @throws Exception
     */
    public static Certificate getCertificate(String keyStorePath, String keyStorePwd, String keyStoreType, String alias)
        throws Exception {
        final KeyStore keyStore = getKeyStore(keyStorePath, keyStorePwd, keyStoreType);
        return keyStore.getCertificate(alias);
    }

    /**
     * 获取KeyStore
     * 
     * @param keyStorePath 路径
     * @param keyStorePwd 密码
     * @param keyStoreType 类型
     * @return
     */
    public static KeyStore getKeyStore(String keyStorePath, String keyStorePwd, String keyStoreType) throws Exception {
        try (InputStream inputStream = new FileInputStream(keyStorePath)) {
            KeyStore keyStore = KeyStore.getInstance(keyStoreType);
            keyStore.load(inputStream, keyStorePwd.toCharArray());
            return keyStore;
        }
    }

    /**
     * 加载DER格式的私钥证书
     * @param filename
     * @return
     * @throws Exception
     */
    public static PrivateKey getDERPrivateKey(String filename) throws Exception {
        byte[] keyBytes = Files.readAllBytes(Paths.get(filename));
        PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory kf = KeyFactory.getInstance("RSA");
        return kf.generatePrivate(spec);
    }

    /**
     * 根据证书库和受信证书库构建双向认证sslSocket工厂
     * 
     * @param p12TrustStore p12受信库
     * @param p12KeyStore p12证书库
     * @param ksPwd 证书库密码
     * @return
     * @throws Exception
     */
    public static SSLSocketFactory getSocketFactoryByPKCS12(String p12TrustStore, String tsPwd, String p12KeyStore,
        String ksPwd) throws Exception {
        final String P12_TYPE = "pkcs12";
        KeyStore trustStore = getKeyStore(p12TrustStore, tsPwd, P12_TYPE);
        TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        tmf.init(trustStore);
        KeyStore keyStore = getKeyStore(p12KeyStore, ksPwd, P12_TYPE);
        // 创建管理JKS密钥库的密钥管理器 (SunX509)
        KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
        // 使用密钥内容源初始化此工厂。 提供者通常使用 KeyStore 来获取在安全套接字协商期间所使用的密钥内容
        kmf.init(keyStore, ksPwd.toCharArray());
        // 初始sslcontext
        SSLContext sslContext = SSLContext.getInstance("TLSv1.2");
        sslContext.init(kmf.getKeyManagers(), tmf.getTrustManagers(), new SecureRandom());
        return sslContext.getSocketFactory();
    }

    /**
     * 通过证书链构造SSLSocketFactory（单向认证）
     * @param keyPath
     * @param pwd
     * @param ca
     * @param crt
     * @return
     * @throws Exception
     */
    public static SSLSocketFactory getSocketFactoryByCrtList(String keyPath, String pwd, String ca, String crt) throws Exception {
        final KeyStore keyStore = KeyStore.getInstance("pkcs12");
        keyStore.load(null);
        PrivateKey privateKey = getDERPrivateKey(keyPath);
        keyStore.setKeyEntry("cert", privateKey, pwd.toCharArray(), new Certificate[]{getX509Certificate(crt), getX509Certificate(ca)});
        // 创建管理JKS密钥库的密钥管理器 (SunX509)
        KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
        // 使用密钥内容源初始化此工厂。 提供者通常使用 KeyStore 来获取在安全套接字协商期间所使用的密钥内容
        kmf.init(keyStore, null);
        // 初始sslcontext
        SSLContext sslContext = SSLContext.getInstance("TLSv1.2");
        // 单向认证，不验证证书以及ip。方便测试
        final TrustManager trustManager = new X509ExtendedTrustManager(){

            @Override
            public void checkClientTrusted(X509Certificate[] chain, String authType, Socket socket) throws CertificateException {

            }

            @Override
            public void checkServerTrusted(X509Certificate[] chain, String authType, Socket socket) throws CertificateException {

            }

            @Override
            public void checkClientTrusted(X509Certificate[] chain, String authType, SSLEngine engine) throws CertificateException {

            }

            @Override
            public void checkServerTrusted(X509Certificate[] chain, String authType, SSLEngine engine) throws CertificateException {

            }

            @Override
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {

            }

            @Override
            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {

            }

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        };
        sslContext.init(kmf.getKeyManagers(), new TrustManager[] {trustManager}, new SecureRandom());
        return sslContext.getSocketFactory();
    }

    /**
     * 需要添加受信的证书
     * 
     * @param certAlias 证书别名
     * @param cert 证书
     * @param trustStore 受信库路径
     * @param pwd 受信库密码
     * @return
     */
    public static boolean trustCert(String certAlias, Certificate cert, String trustStore, String pwd,
        String storeType) {
        boolean isOk = true;
        try {
            initTrustStoreIfNotExist(trustStore, pwd, storeType);
        } catch (Exception e) {
            log.error("create trustStore error", e);
            isOk = false;
        }
        if (isOk) {
            try (FileInputStream ips = new FileInputStream(trustStore)) {
                KeyStore ks = KeyStore.getInstance(storeType);
                ks.load(ips, pwd.toCharArray());
                ks.deleteEntry(certAlias);
                ks.setCertificateEntry(certAlias, cert);
                try (FileOutputStream ops = new FileOutputStream(trustStore)) {
                    ks.store(ops, pwd.toCharArray());
                }
            } catch (Exception e) {
                log.error("authorization certificate error", e);
                isOk = false;
            }
        }
        return isOk;
    }

    /**
     * 如果不存在创建文件
     * 
     * @param trustStore 文件路径
     * @return 是否新建
     */
    public static void initTrustStoreIfNotExist(String trustStore, String pwd, String storeType) throws Exception {
        File trustStoreFile = new File(trustStore);
        if (!trustStoreFile.getParentFile().exists()) {
            trustStoreFile.getParentFile().mkdirs();
        }
        if (!trustStoreFile.exists()) {
            trustStoreFile.createNewFile();
            KeyStore ks = KeyStore.getInstance(storeType);
            try (FileOutputStream ops = new FileOutputStream(trustStoreFile)) {
                ks.load(null);
                ks.store(ops, pwd.toCharArray());
            }
        }
    }

    /**
     * 使用TrustStore检测证书（链）是否受信
     * 
     * @param crt
     * @param certPath
     * @return
     */
    public static boolean authCertByTrustStore(String crt, String... certPath) {
        boolean res = true;
        try {
            // 需要校验的证书
            X509Certificate[] crts = new X509Certificate[certPath.length];
            for (int i = 0; i < certPath.length; i++) {
                crts[i] = getX509Certificate(certPath[i]);
            }
            KeyStore trustStore = KeyStore.getInstance("pkcs12");
            trustStore.load(null);
            trustStore.setCertificateEntry("ca", getX509Certificate(crt));
            TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(trustStore);
            final TrustManager[] trustManagers = tmf.getTrustManagers();
            for (int i = 0; i < trustManagers.length; i++) {
                X509TrustManager manager = (X509TrustManager)trustManagers[i];
                // 检测不成功会抛出异常
//                manager.checkClientTrusted(new X509Certificate[] {certificate}, "RSA");
                manager.checkServerTrusted(crts, "RSA");
            }
        } catch (Exception e) {
            log.error("auth cert error ", e);
            res = false;
        }
        return res;
    }
}