java Android OKHttp HTTPS 请求证书验证 PEM证书（1）

地址：http://blog.csdn.net/doubleping/article/details/53331864

调用new CustomTrust() 即可产生OkHttpClient

关键点：

1、将pem证书放入Raw或者assets目录。

2、证书的KeyStore读取方式。

3、HostnameVerifier过滤验证。

讲解： Pem 有多个 Certificate ，用CertificateFactory 读取 inputstream 为context.getResources().openRawResource(R.raw.a223)

1、证书读取详细：

private SSLContext trustManagerForCertificates(InputStream in)
throws GeneralSecurityException, IOException {
CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
Collection<? extends Certificate> certificates = certificateFactory.generateCertificates(in);
if (certificates.isEmpty()) {
throw new IllegalArgumentException("expected non-empty set of trusted certificates");
}

// Put the certificates a key store.
char[] password = CLIENT_KET_PASSWORD.toCharArray(); // Any password will work.
KeyStore keyStore = newEmptyKeyStore(password);
int index = 0;
for (Certificate certificate : certificates) {
String certificateAlias = Integer.toString(index++);
keyStore.setCertificateEntry(certificateAlias, certificate);
}

//  keyStore.load(in,CLIENT_KET_PASSWORD.toCharArray());
// Use it to build an X509 trust manager.
KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(
KeyManagerFactory.getDefaultAlgorithm());
keyManagerFactory.init(keyStore, password);
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));
}

SSLContext ssContext = SSLContext.getInstance("SSL");
ssContext.init(keyManagerFactory.getKeyManagers(),trustManagers,null);
//return (X509TrustManager) trustManagers[0];
return  ssContext;
}

private KeyStore newEmptyKeyStore(char[] password) throws GeneralSecurityException {
try {
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
InputStream in = null; // By convention, 'null' creates an empty key store.
keyStore.load(in, password);
return keyStore;
} catch (IOException e) {
throw new AssertionError(e);
}
}

2、SSLContext创建

关键：必须重写 HostnameVerifier 不然会出现javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated.错误，因为OKhttp 拥有默认的验证。

try {
//  trustManager = trustManagerForCertificates(trustedCertificatesInputStream());
SSLContext sslContext =  trustManagerForCertificates(trustedCertificatesInputStream()); //SSLContext.getInstance("TLS");
sslSocketFactory = sslContext.getSocketFactory();
} catch (GeneralSecurityException e) {
throw new RuntimeException(e);
} catch (IOException e) {
e.printStackTrace();
}
client = new OkHttpClient.Builder()
.sslSocketFactory(sslSocketFactory).hostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
})
.build();

所有代码：将证书路径改动一下就可以直接使用了

import android.content.Context;

import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.util.Arrays;
import java.util.Collection;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;

import okhttp3.CertificatePinner;
import okhttp3.OkHttpClient;

public final class CustomTrust {
public static final String tag = "CustomTrust";
private static final String CLIENT_KET_PASSWORD = "2342342342344433";
public final OkHttpClient client;
Context context;
public CustomTrust(Context context)  {
this.context = context;
X509TrustManager trustManager;
SSLSocketFactory sslSocketFactory=null;

try {
//  trustManager = trustManagerForCertificates(trustedCertificatesInputStream());
SSLContext sslContext =  trustManagerForCertificates(trustedCertificatesInputStream()); //SSLContext.getInstance("TLS");
sslSocketFactory = sslContext.getSocketFactory();
} catch (GeneralSecurityException e) {
throw new RuntimeException(e);
} catch (IOException e) {
e.printStackTrace();
}
client = new OkHttpClient.Builder()
.sslSocketFactory(sslSocketFactory).hostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
})
.build();
}

/**
* Returns an input stream containing one or more certificate PEM files. This implementation just
* embeds the PEM files in Java strings; most applications will instead read this from a resource
* file that gets bundled with the application.
*/
private InputStream trustedCertificatesInputStream() {
// PEM files for root certificates of Comodo and Entrust. These two CAs are sufficient to view
// https://publicobject.com (Comodo) and https://squareup.com (Entrust). But they aren't
// sufficient to connect to most HTTPS sites including https://godaddy.com and https://visa.com. // Typically developers will need to get a PEM file from their organization's TLS administrator.

return context.getResources().openRawResource(R.raw.qwww2) ;

/*return new Buffer()
.writeUtf8(comodoRsaCertificationAuthority)
.writeUtf8(entrustRootCertificateAuthority)
.inputStream();*/
}

/**
* Returns a trust manager that trusts {@code certificates} and none other. HTTPS services whose
* certificates have not been signed by these certificates will fail with a {@code
* SSLHandshakeException}.
*
* <p>This can be used to replace the host platform's built-in trusted certificates with a custom
* set. This is useful in development where certificate authority-trusted certificates aren't
* available. Or in production, to avoid reliance on third-party certificate authorities.
*
* <p>See also {@link CertificatePinner}, which can limit trusted certificates while still using
* the host platform's built-in trust store.
*
* <h3>Warning: Customizing Trusted Certificates is Dangerous!</h3>
*
* <p>Relying on your own trusted certificates limits your server team's ability to update their
* TLS certificates. By installing a specific set of trusted certificates, you take on additional
* operational complexity and limit your ability to migrate between certificate authorities. Do
* not use custom trusted certificates in production without the blessing of your server's TLS
* administrator.
*/
private SSLContext trustManagerForCertificates(InputStream in)
throws GeneralSecurityException, IOException {
CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
Collection<? extends Certificate> certificates = certificateFactory.generateCertificates(in);
if (certificates.isEmpty()) {
throw new IllegalArgumentException("expected non-empty set of trusted certificates");
}

// Put the certificates a key store.
char[] password = CLIENT_KET_PASSWORD.toCharArray(); // Any password will work.
KeyStore keyStore = newEmptyKeyStore(password);
int index = 0;
for (Certificate certificate : certificates) {
String certificateAlias = Integer.toString(index++);
keyStore.setCertificateEntry(certificateAlias, certificate);
}

//  keyStore.load(in,CLIENT_KET_PASSWORD.toCharArray());
// Use it to build an X509 trust manager.
KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(
KeyManagerFactory.getDefaultAlgorithm());
keyManagerFactory.init(keyStore, password);
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));
}

SSLContext ssContext = SSLContext.getInstance("SSL");
ssContext.init(keyManagerFactory.getKeyManagers(),trustManagers,null);
//return (X509TrustManager) trustManagers[0];
return  ssContext;
}

private KeyStore newEmptyKeyStore(char[] password) throws GeneralSecurityException {
try {
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
InputStream in = null; // By convention, 'null' creates an empty key store.
keyStore.load(in, password);
return keyStore;
} catch (IOException e) {
throw new AssertionError(e);
}
}

//  public static void main(String... args) throws Exception {
//    new CustomTrust().run();
//  }
}