- 问题描述
一些通过CA认证的，https是可以直接访问的，但一些自签名证书，用retrofit直接访问则会走到onFailure里,错误信息是无法通过证书验证。
onFailure: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
比如下面这样。
String baseUrl = "https://kyfw.12306.cn/";
OkHttpClient.Builder clientBuilder = new OkHttpClient.Builder();
Retrofit retrofit = new Retrofit.Builder().baseUrl(baseUrl).client(clientBuilder.build()).build();
HttpsInterf httpsInterf = retrofit.create(HttpsInterf.class);
Call<ResponseBody> responseBodyCall = httpsInterf.get();
responseBodyCall.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
Log.d("ZFDT", "onResponse: " + response.body().toString());
}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
Log.d("ZFDT", "onFailure: " + t.getLocalizedMessage());
}
});
- 解决办法：
- 首先把证书放到assets下面。如果你是chrome浏览器的话，请按CTRL+SHIFT+I打开开发者工具，点击Security->View certificate->详细信息->复制到文件
image.png
- 增加下面的方法
/**
* 通过okhttpClient来设置证书
* @param clientBuilder OKhttpClient.builder
* @param certificates 读取证书的InputStream
*/
public void setCertificates(OkHttpClient.Builder clientBuilder, InputStream... certificates) {
try {
CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
keyStore.load(null);
int index = 0;
for (InputStream certificate : certificates) {
String certificateAlias = Integer.toString(index++);
keyStore.setCertificateEntry(certificateAlias, certificateFactory
.generateCertificate(certificate));
try {
if (certificate != null)
certificate.close();
} catch (IOException e) {
}
}
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(
TrustManagerFactory.getDefaultAlgorithm());
trustManagerFactory.init(keyStore);
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];
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, trustManagerFactory.getTrustManagers(), new SecureRandom());
SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
clientBuilder.sslSocketFactory(sslSocketFactory, trustManager);
} catch (Exception e) {
e.printStackTrace();
}
}
- 在建立retrofit实例前，调用上面的方法即可。
String baseUrl = "https://kyfw.12306.cn/";
OkHttpClient.Builder clientBuilder = new OkHttpClient.Builder();
try {
setCertificates(clientBuilder,getAssets().open("https12306.cer"));
} catch (IOException e) {
e.printStackTrace();
}
Retrofit retrofit = new Retrofit.Builder().baseUrl(baseUrl).client(clientBuilder.build()).build();
HttpsInterf httpsInterf = retrofit.create(HttpsInterf.class);
Call<ResponseBody> responseBodyCall = httpsInterf.get();
responseBodyCall.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
Log.d("ZFDT", "onResponse: " + response.body().toString());
}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
Log.d("ZFDT", "onFailure: " + t.getLocalizedMessage());
}
});
