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         Log_OC.d(TAG, "onAttach");
 113         super.onAttach(activity);
 114         if (!(activity instanceof OnSslUntrustedCertListener)) {
 115             throw new IllegalArgumentException("The host activity must implement " + OnSslUntrustedCertListener.class.getCanonicalName());
 116         }
 117     }
 118
 119
 120     @Override
 121     public void onCreate(Bundle savedInstanceState) {
 122         Log_OC.d(TAG, "onCreate, savedInstanceState is " + savedInstanceState);
 123         super.onCreate(savedInstanceState);
 124         setRetainInstance(true);    // force to keep the state of the fragment on configuration changes (such as device rotations)
 125         setCancelable(false);
 126         mView = null;
 127     }
 128
 129     @Override
 130     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 131         Log_OC.d(TAG, "onCreateView, savedInsanceState is " + savedInstanceState);
 132         // Create a view by inflating desired layout
 133         if (mView == null) {
 134             mView = inflater.inflate(R.layout.ssl_untrusted_cert_layout, container,  false);
 135             mView.findViewById(R.id.details_scroll).setVisibility(View.GONE);
 136             mErrorViewAdapter.updateErrorView(mView);
 137         } else {
 138             ((ViewGroup)mView.getParent()).removeView(mView);
 139         }
 140
 141         Button ok = (Button) mView.findViewById(R.id.ok);
 142         ok.setOnClickListener(new OnCertificateTrusted());
 143
 144         Button cancel = (Button) mView.findViewById(R.id.cancel);
 145         cancel.setOnClickListener(new OnCertificateNotTrusted());
 146
 147         Button details = (Button) mView.findViewById(R.id.details_btn);
 148         details.setOnClickListener(new OnClickListener() {
 149
 150             @Override
 151             public void onClick(View v) {
 152                 View detailsScroll = mView.findViewById(R.id.details_scroll);
 153                 if (detailsScroll.getVisibility() == View.VISIBLE) {
 154                     detailsScroll.setVisibility(View.GONE);
 155                     ((Button) v).setText(R.string.ssl_validator_btn_details_see);
 156
 157                 } else {
 158                     detailsScroll.setVisibility(View.VISIBLE);
 159                     ((Button) v).setText(R.string.ssl_validator_btn_details_hide);
 160                     mCertificateViewAdapter.updateCertificateView(mView);
 161                 }
 162             }
 163
 164         });
 165
 166         return mView;
 167     }
 168
 169
 170     @Override
 171     public Dialog onCreateDialog(Bundle savedInstanceState) {
 172         Log_OC.d(TAG, "onCreateDialog, savedInstanceState is " + savedInstanceState);
 173         final Dialog dialog = super.onCreateDialog(savedInstanceState);
 174         dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
 175         return dialog;
 176     }
 177
 178     @Override
 179     public void onDestroyView() {
 180         Log_OC.d(TAG, "onDestroyView");
 181         if (getDialog() != null && getRetainInstance())
 182             getDialog().setDismissMessage(null);
 183         super.onDestroyView();
 184     }
 185
 186     private class OnCertificateNotTrusted implements OnClickListener {
 187
 188         @Override
 189         public void onClick(View v) {
 190             getDialog().cancel();
 191             if (mHandler != null) {
 192                 mHandler.cancel();
 193             }
 194             ((OnSslUntrustedCertListener)getSherlockActivity()).onCancelCertificate();
 195         }
 196     }
 197
 198
 199     private class OnCertificateTrusted implements OnClickListener {
 200
 201         @Override
 202         public void onClick(View v) {
 203             dismiss();
 204             if (mHandler != null) {
 205                 mHandler.proceed();
 206             }
 207             if (m509Certificate != null) {
 208                 Activity activity = getSherlockActivity();
 209                 try {
 210                     NetworkUtils.addCertToKnownServersStore(m509Certificate, activity);   // TODO make this asynchronously, it can take some time
 211                     ((OnSslUntrustedCertListener)activity).onSavedCertificate();
 212
 213                 } catch (GeneralSecurityException e) {
 214                     ((OnSslUntrustedCertListener)activity).onFailedSavingCertificate();
 215                     Log_OC.e(TAG, "Server certificate could not be saved in the known-servers trust store ", e);
 216
 217                 } catch (IOException e) {
 218                     ((OnSslUntrustedCertListener)activity).onFailedSavingCertificate();
 219                     Log_OC.e(TAG, "Server certificate could not be saved in the known-servers trust store ", e);
 220                 }
 221             }
 222         }
 223
 224     }
 225
 226
 227     public interface OnSslUntrustedCertListener {
 228         public void onSavedCertificate();
 229         public void onFailedSavingCertificate();
 230         public void onCancelCertificate();
 231     }
 232
 233     public interface ErrorViewAdapter {
 234         void updateErrorView(View mView);
 235     }
 236
 237     public interface CertificateViewAdapter {
 238         void updateCertificateView(View mView);
 239     }
 240
 241 }