首先,需要知道是什么是https
百度一波:
HTTPS（全称：Hyper Text Transfer Protocol over Secure Socket Layer 或 Hypertext Transfer Protocol Secure，超文本传输安全协议），是以安全为目标的HTTP通道，简单讲是HTTP的安全版。即HTTP下加入SSL层，HTTPS的安全基础是SSL，因此加密的详细内容就需要SSL。 它是一个URI scheme（抽象标识符体系），句法类同http:体系。用于安全的HTTP数据传输。https:URL表明它使用了HTTP，但HTTPS存在不同于HTTP的默认端口及一个加密/身份验证层（在HTTP与TCP之间）。这个系统的最初研发由网景公司(Netscape)进行，并内置于其浏览器Netscape Navigator中，提供了身份验证与加密通讯方法。现在它被广泛用于万维网上安全敏感的通讯，例如交易支付方面。
上面说得也很详细,也需要注意的一点是:HTTPS存在不同于HTTP的默认[端口],这个端口号是不一样的,它是443
然后再知道什么是Retrofit
百度一波:
Retrofit是Square公司开源的一个高质量高效率的HTTP库，github上面star数量最多的Android网络库就是这个。底层封装了okhttp，JakeWharton大神的经典作品之一。
怎么用
约等于百度哈~详细就不说了
在这里我们只说怎么配置证书
首先
问你们的后端人员要一个证书
然后
把证书扔进你的asset目录
紧接着
获取你目录下的证书
private static KeyStore getKeyStore(String fileName) {
KeyStore keyStore = null;
try {
AssetManager assetManager = MyApp.getAppContext().getAssets();
CertificateFactory cf = CertificateFactory.getInstance("X.509");
InputStream caInput = assetManager.open(fileName);
Certificate ca;
try {
ca = cf.generateCertificate(caInput);
Log.e("SslUtils", "ca=" + ((X509Certificate) ca).getSubjectDN());
} finally {
caInput.close();
}
keyStore = KeyStore.getInstance("BKS");
keyStore.load(null, null);
keyStore.setCertificateEntry("ca", ca);
} catch (Exception e) {
Log.e("SslUtils", "Error during getting keystore", e);
}
return keyStore;
}
再然后
public static SSLContext getSslContextForCertificateFile(String fileName) {
try {
KeyStore keyStore = getKeyStore(fileName);
SSLContext sslContext = SSLContext.getInstance("SSL");
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
trustManagerFactory.init(keyStore);
sslContext.init(null, trustManagerFactory.getTrustManagers(), new SecureRandom());
return sslContext;
} catch (Exception e) {
String msg = "Error during creating SslContext for certificate from assets";
Log.e("SslUtils", msg, e);
throw new RuntimeException(msg);
}
}
最后
final SSLContext sslContext;
try {
sslContext = AppUtil.getSslContextForCertificateFile("xxx.bks");
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(
TrustManagerFactory.getDefaultAlgorithm());
trustManagerFactory.init((KeyStore) null);
TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
throw new IllegalStateException("Unexpected default trust managers:"
+ Arrays.toString(trustManagers));
}
X509TrustManager trustManager = (X509TrustManager) trustManagers[0];
mOkHttpClient = new OkHttpClient.Builder()
.cache(cache)
.hostnameVerifier((hostname, session) -> true)//校验IP
.sslSocketFactory(sslContext.getSocketFactory(), trustManager)
.connectTimeout(20, TimeUnit.SECONDS)
.writeTimeout(20, TimeUnit.SECONDS)
.readTimeout(20, TimeUnit.SECONDS)
.cookieJar(cookieJar)//cookie持久化
.build();
} catch (Exception pE) {
pE.printStackTrace();
}
}
- 当然这是其中一种方式,还有别的方式,其实不太建议:
public class SSLSocketFactoryUtils {
/*
* 默认信任所有的证书
* todo 最好加上证书认证，主流App都有自己的证书
* */
public static SSLSocketFactory createSSLSocketFactory() {
SSLSocketFactory sslSocketFactory = null;
try {
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, new TrustManager[]{createTrustAllManager()}, new SecureRandom());
sslSocketFactory = sslContext.getSocketFactory();
} catch (Exception e) {
}
return sslSocketFactory;
}
public static X509TrustManager createTrustAllManager() {
X509TrustManager tm = null;
try {
tm = new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
//do nothing，接受任意客户端证书
}
public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
//do nothing，接受任意服务端证书
}
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
};
} catch (Exception e) {
}
return tm;
}
public static class TrustAllHostnameVerifier implements HostnameVerifier {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
}
}
然后
mOkHttpClient = new OkHttpClient.Builder()
.cache(cache)
.hostnameVerifier((hostname, session) -> true)//校验IP
.sslSocketFactory(SSLSocketFactoryUtils.createSSLSocketFactory(), SSLSocketFactoryUtils.createTrustAllManager())
// .addNetworkInterceptor(reWriteCacheControlInterceptor)
.addInterceptor(reWriteCacheControlInterceptor)
.connectTimeout(20, TimeUnit.SECONDS)
.writeTimeout(20, TimeUnit.SECONDS)
.readTimeout(20, TimeUnit.SECONDS)
.cookieJar(cookieJar)//cookie持久化
.build();
这种方式挺不安全的
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