Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright 2014 Zhenguo Jin
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.content.Context;

import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.Signature;

import java.io.ByteArrayInputStream;

import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

import javax.security.auth.x500.X500Principal;

public class Main {
    private final static X500Principal DEBUG_DN = new X500Principal("CN=Android Debug,O=Android,C=US");

    public static boolean isDebuggable(Context ctx) {
        boolean debuggable = false;
        try {
            PackageInfo pinfo = ctx.getPackageManager().getPackageInfo(ctx.getPackageName(),
                    PackageManager.GET_SIGNATURES);
            Signature signatures[] = pinfo.signatures;
            for (int i = 0; i < signatures.length; i++) {
                CertificateFactory cf = CertificateFactory.getInstance("X.509");//No i18n
                ByteArrayInputStream stream = new ByteArrayInputStream(signatures[i].toByteArray());
                X509Certificate cert = (X509Certificate) cf.generateCertificate(stream);
                debuggable = cert.getSubjectX500Principal().equals(DEBUG_DN);
                if (debuggable) {
                    break;
                }
            }

        } catch (NameNotFoundException e) {
        } catch (CertificateException e) {
        }
        return debuggable;
    }
}