安卓OKHTTP库添加HTTPS证书验证

一、前言：

网传的使用sslSocketFactory方法的验证方式已经过时了，因为使用这个方法会使用反射机制寻找X509信任管理类，消耗了不必要的性能。

新的方法名称依然叫sslSocketFactory，但是会传入信任管理类数组中的第一条，这个博主已在OKHTTP的GITHUB样例源码中求证，请各位放心使用~

这里放上博主封装的工具，支持传入字符串证书、传入RAW资源目录下的证书、批量添加证书和信任所有证书的功能。

二、使用：

1、 okhttp调用：

  /**
     * 添加应用拦截器interceptor
     * @param interceptor
     * @return
     */
    @Singleton
    @Provides
    public OkHttpClient provideOkHttpClient(HttpInterceptor interceptor){
        HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();
       httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        //信任所有证书
        HTTPSCerUtils.setTrustAllCertificate(builder);
        return builder.
                connectTimeout(CONNECT_TIMEOUT, TimeUnit.SECONDS).
                readTimeout(READ_TIMEOUT, TimeUnit.SECONDS).
                writeTimeout(WRITE_TIMEOUT, TimeUnit.SECONDS).
                //添加拦截器
                addInterceptor(interceptor).
                retryOnConnectionFailure(true).
                build();
    }

2、调用方法：

//信任所有证书
HTTPSCerUtils.setTrustAllCertificate(okHttpBuilder);
 
//信任raw资源目录下的证书
HTTPSCerUtils.setCertificate(context, okHttpBuilder, R.raw.rootca);
 
//传入证书字符串
HTTPSCerUtils.setCertificate(context,okHttpBuilder,"!@$#@!$@#^@^#!");

3、工具类

public class HTTPSCerUtils {

    //信任所有证书
    public static void setTrustAllCertificate(OkHttpClient.Builder okHttpClientBuilder) {
        try {
            SSLContext sc = SSLContext.getInstance("TLS");
            X509TrustManager trustAllManager = new X509TrustManager() {
                @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];
                }
            };
            sc.init(null, new TrustManager[]{trustAllManager}, new SecureRandom());
            okHttpClientBuilder.sslSocketFactory(sc.getSocketFactory(), trustAllManager);
            //如果需要兼容安卓5.0以下，可以使用这句
            //okHttpClientBuilder.sslSocketFactory(new TLSSocketFactory(), trustAllManager);
            okHttpClientBuilder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //只信任指定证书（传入字符串）
    public static void setCertificate(Context context, OkHttpClient.Builder okHttpClientBuilder, String cerStr) {
        try {
            CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(cerStr.getBytes());
            Certificate ca = certificateFactory.generateCertificate(byteArrayInputStream);

            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);
            keyStore.setCertificateEntry("ca", ca);

            byteArrayInputStream.close();

            TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(keyStore);

            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, tmf.getTrustManagers(), new SecureRandom());
            okHttpClientBuilder.sslSocketFactory(sslContext.getSocketFactory(), (X509TrustManager) tmf.getTrustManagers()[0]);
            okHttpClientBuilder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //只信任指定证书（传入raw资源ID）
    public static void setCertificate(Context context, OkHttpClient.Builder okHttpClientBuilder, int cerResID) {
        try {
            CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
            InputStream inputStream = context.getResources().openRawResource(cerResID);
            Certificate ca = certificateFactory.generateCertificate(inputStream);

            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);
            keyStore.setCertificateEntry("ca", ca);

            inputStream.close();

            TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(keyStore);

            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, tmf.getTrustManagers(), new SecureRandom());
            okHttpClientBuilder.sslSocketFactory(sslContext.getSocketFactory(), (X509TrustManager) tmf.getTrustManagers()[0]);
            okHttpClientBuilder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //批量信任证书
    public static void setCertificates(Context context, OkHttpClient.Builder okHttpClientBuilder, int... cerResIDs) {
        try {
            CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");

            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);
            for (int i = 0; i < cerResIDs.length; i++) {
                Certificate ca = certificateFactory.generateCertificate(context.getResources().openRawResource(cerResIDs[i]));
                keyStore.setCertificateEntry("ca" + i, ca);
            }

            TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(keyStore);

            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, tmf.getTrustManagers(), new SecureRandom());
            okHttpClientBuilder.sslSocketFactory(sslContext.getSocketFactory(), (X509TrustManager) tmf.getTrustManagers()[0]);
            okHttpClientBuilder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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转载：https://blog.csdn.net/u014653815/article/details/83754057