Adding a custom certificate to an OkHttp Client

问题

I am trying to make Android app, where I can get and parse HTML (from site which doesnt have API). I am using OkHttp. The site has untrusted (but valid) certificate. I am getting:

java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.

I've already set up the official way (https://developer.android.com/training/articles/security-ssl#java) and now I need to link it with OkHttpClient.

I tried

    OkHttpClient client = new OkHttpClient;

    OkHttpClient.Builder builder = client.newBuilder();
    builder.sslSocketFactory(sslcontext.getSocketFactory()).build();

But it doesnt work, and also it is deprecated. Thanks

回答1:

You need to use sslSocketFactory(SSLSocketFactory sslSocketFactory, X509TrustManager trustManager) which is not deprecated.

Use this variable (which creates a trust manager that does not validate certificate chains):

TrustManager[] trustAllCerts = new TrustManager[] {
    new X509TrustManager() {
        @Override
        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return new java.security.cert.X509Certificate[]{};
        }
    }
};

and pass to sslSocketFactory() in this way:

builder.sslSocketFactory(sslSocketFactory, (X509TrustManager)trustAllCerts[0]);

also apply this to verify every host:

builder.hostnameVerifier(new HostnameVerifier() {
    @Override
    public boolean verify(String hostname, SSLSession session) {
        return true;
    }
});

回答2:

See this documented example for adding a known trusted certificate

https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/CustomTrust.java

  public CustomTrust() {
    X509TrustManager trustManager;
    SSLSocketFactory sslSocketFactory;
    try {
      trustManager = trustManagerForCertificates(trustedCertificatesInputStream());
      SSLContext sslContext = SSLContext.getInstance("TLS");
      sslContext.init(null, new TrustManager[] { trustManager }, null);
      sslSocketFactory = sslContext.getSocketFactory();
    } catch (GeneralSecurityException e) {
      throw new RuntimeException(e);
    }

    client = new OkHttpClient.Builder()
        .sslSocketFactory(sslSocketFactory, trustManager)
        .build();
  }

来源：https://stackoverflow.com/questions/53304082/adding-a-custom-certificate-to-an-okhttp-client

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java

android

ssl

okhttp