src/com/owncloud/android/ui/dialog/SslUntrustedCertDialog.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2014 ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17 package com.owncloud.android.ui.dialog;
  18
  19 import java.io.IOException;
  20 import java.security.GeneralSecurityException;
  21 import java.security.cert.X509Certificate;
  22
  23 import android.app.Activity;
  24 import android.app.Dialog;
  25 import android.net.http.SslError;
  26 import android.os.Bundle;
  27 import android.view.LayoutInflater;
  28 import android.view.View;
  29 import android.view.ViewGroup;
  30 import android.view.Window;
  31 import android.view.View.OnClickListener;
  32 import android.webkit.SslErrorHandler;
  33 import android.widget.Button;
  34
  35 import com.actionbarsherlock.app.SherlockDialogFragment;
  36 import com.owncloud.android.R;
  37 import com.owncloud.android.lib.common.network.CertificateCombinedException;
  38 import com.owncloud.android.lib.common.network.NetworkUtils;
  39 import com.owncloud.android.ui.adapter.CertificateCombinedExceptionViewAdapter;
  40 import com.owncloud.android.ui.adapter.SslCertificateViewAdapter;
  41 import com.owncloud.android.ui.adapter.SslErrorViewAdapter;
  42 import com.owncloud.android.ui.adapter.X509CertificateViewAdapter;
  43 import com.owncloud.android.utils.Log_OC;
  44
  45 /**
  46  * Dialog to show information about an untrusted certificate and allow the user
  47  * to decide trust on it or not.
  48  *
  49  * Abstract implementation of common functionality for different dialogs that
  50  * get the information about the error and the certificate from different classes.
  51  *
  52  * @author masensio
  53  * @author David A. Velasco
  54  */
  55 public class SslUntrustedCertDialog extends SherlockDialogFragment {
  56
  57     private final static String TAG = SslUntrustedCertDialog.class.getSimpleName();
  58
  59     protected View mView = null;
  60     protected SslErrorHandler mHandler = null;
  61     protected X509Certificate m509Certificate = null;
  62
  63     private ErrorViewAdapter mErrorViewAdapter = null;
  64     private CertificateViewAdapter mCertificateViewAdapter = null;
  65
  66     public static SslUntrustedCertDialog newInstanceForEmptySslError(SslError error, SslErrorHandler handler) {
  67         if (error == null) {
  68             throw new IllegalArgumentException("Trying to create instance with parameter error == null");
  69         }
  70         if (handler == null) {
  71             throw new IllegalArgumentException("Trying to create instance with parameter handler == null");
  72         }
  73         SslUntrustedCertDialog dialog = new SslUntrustedCertDialog();
  74         dialog.mHandler = handler;
  75         dialog.mErrorViewAdapter = new SslErrorViewAdapter(error);
  76         dialog.mCertificateViewAdapter = new SslCertificateViewAdapter(error.getCertificate());
  77         return dialog;
  78     }
  79
  80     public static SslUntrustedCertDialog newInstanceForFullSslError(CertificateCombinedException sslException) {
  81         if (sslException == null) {
  82             throw new IllegalArgumentException("Trying to create instance with parameter sslException == null");
  83         }
  84         SslUntrustedCertDialog dialog = new SslUntrustedCertDialog();
  85         dialog.m509Certificate = sslException.getServerCertificate();
  86         dialog.mErrorViewAdapter = new CertificateCombinedExceptionViewAdapter(sslException);
  87         dialog.mCertificateViewAdapter = new X509CertificateViewAdapter(sslException.getServerCertificate());
  88         return dialog;
  89     }
  90
  91     public static SslUntrustedCertDialog newInstanceForFullSslError(X509Certificate cert, SslError error, SslErrorHandler handler) {
  92         if (cert == null) {
  93             throw new IllegalArgumentException("Trying to create instance with parameter cert == null");
  94         }
  95         if (error == null) {
  96             throw new IllegalArgumentException("Trying to create instance with parameter error == null");
  97         }
  98         if (handler == null) {
  99             throw new IllegalArgumentException("Trying to create instance with parameter handler == null");
 100         }
 101         SslUntrustedCertDialog dialog = new SslUntrustedCertDialog();
 102         dialog.m509Certificate = cert;
 103         dialog.mHandler = handler;
 104         dialog.mErrorViewAdapter = new SslErrorViewAdapter(error);
 105         dialog.mCertificateViewAdapter = new X509CertificateViewAdapter(cert);
 106         return dialog;
 107     }
 108
 109
 110     @Override
 111     public void onAttach(Activity activity) {
 112         super.onAttach(activity);
 113         if (!(activity instanceof OnSslUntrustedCertListener)) {
 114             throw new IllegalArgumentException("The host activity must implement " + OnSslUntrustedCertListener.class.getCanonicalName());
 115         }
 116     }
 117
 118
 119     @Override
 120     public void onCreate(Bundle savedInstanceState) {
 121         super.onCreate(savedInstanceState);
 122         setRetainInstance(true);    // force to keep the state of the fragment on configuration changes (such as device rotations)
 123         setCancelable(false);
 124         mView = null;
 125     }
 126
 127     @Override
 128     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 129         // Create a view by inflating desired layout
 130         if (mView == null) {
 131             mView = inflater.inflate(R.layout.ssl_untrusted_cert_layout, container,  false);
 132             mView.findViewById(R.id.details_scroll).setVisibility(View.GONE);
 133             mErrorViewAdapter.updateErrorView(mView);
 134         } else {
 135             ((ViewGroup)mView.getParent()).removeView(mView);
 136         }
 137
 138         Button ok = (Button) mView.findViewById(R.id.ok);
 139         ok.setOnClickListener(new OnCertificateTrusted());
 140
 141         Button cancel = (Button) mView.findViewById(R.id.cancel);
 142         cancel.setOnClickListener(new OnCertificateNotTrusted());
 143
 144         Button details = (Button) mView.findViewById(R.id.details_btn);
 145         details.setOnClickListener(new OnClickListener() {
 146
 147             @Override
 148             public void onClick(View v) {
 149                 View detailsScroll = mView.findViewById(R.id.details_scroll);
 150                 if (detailsScroll.getVisibility() == View.VISIBLE) {
 151                     detailsScroll.setVisibility(View.GONE);
 152                     ((Button) v).setText(R.string.ssl_validator_btn_details_see);
 153
 154                 } else {
 155                     detailsScroll.setVisibility(View.VISIBLE);
 156                     ((Button) v).setText(R.string.ssl_validator_btn_details_hide);
 157                     mCertificateViewAdapter.updateCertificateView(mView);
 158                 }
 159             }
 160
 161         });
 162
 163         return mView;
 164     }
 165
 166
 167     @Override
 168     public Dialog onCreateDialog(Bundle savedInstanceState) {
 169         final Dialog dialog = super.onCreateDialog(savedInstanceState);
 170         dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
 171         return dialog;
 172     }
 173
 174     @Override
 175     public void onDestroyView() {
 176         if (getDialog() != null && getRetainInstance())
 177             getDialog().setDismissMessage(null);
 178         super.onDestroyView();
 179     }
 180
 181     private class OnCertificateNotTrusted implements OnClickListener {
 182
 183         @Override
 184         public void onClick(View v) {
 185             getDialog().cancel();
 186             if (mHandler != null) {
 187                 mHandler.cancel();
 188             }
 189             ((OnSslUntrustedCertListener)getSherlockActivity()).onCancelCertificate();
 190         }
 191     }
 192
 193
 194     private class OnCertificateTrusted implements OnClickListener {
 195
 196         @Override
 197         public void onClick(View v) {
 198             dismiss();
 199             if (mHandler != null) {
 200                 mHandler.proceed();
 201             }
 202             if (m509Certificate != null) {
 203                 Activity activity = getSherlockActivity();
 204                 try {
 205                     NetworkUtils.addCertToKnownServersStore(m509Certificate, activity);   // TODO make this asynchronously, it can take some time
 206                     ((OnSslUntrustedCertListener)activity).onSavedCertificate();
 207
 208                 } catch (GeneralSecurityException e) {
 209                     ((OnSslUntrustedCertListener)activity).onFailedSavingCertificate();
 210                     Log_OC.e(TAG, "Server certificate could not be saved in the known-servers trust store ", e);
 211
 212                 } catch (IOException e) {
 213                     ((OnSslUntrustedCertListener)activity).onFailedSavingCertificate();
 214                     Log_OC.e(TAG, "Server certificate could not be saved in the known-servers trust store ", e);
 215                 }
 216             }
 217         }
 218
 219     }
 220
 221
 222     public interface OnSslUntrustedCertListener {
 223         public void onSavedCertificate();
 224         public void onFailedSavingCertificate();
 225         public void onCancelCertificate();
 226     }
 227
 228     public interface ErrorViewAdapter {
 229         void updateErrorView(View mView);
 230     }
 231
 232     public interface CertificateViewAdapter {
 233         void updateCertificateView(View mView);
 234     }
 235
 236 }