Use Document API on KitKat for file encrypt/decrypt

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/Constants.java

@@ -17,6 +17,7 @@
 
 package org.sufficientlysecure.keychain;
 
+import android.os.Build;
 import android.os.Environment;
 
 import org.spongycastle.bcpg.CompressionAlgorithmTags;
@@ -48,6 +49,8 @@ public final class Constants {
 
     public static final String CUSTOM_CONTACT_DATA_MIME_TYPE = "vnd.android.cursor.item/vnd.org.sufficientlysecure.keychain.key";
 
+    public static boolean KITKAT = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
+
     public static final class Path {
         public static final String APP_DIR = Environment.getExternalStorageDirectory()
                 + "/OpenKeychain";

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/FileHelper.java

@@ -17,12 +17,14 @@
 
 package org.sufficientlysecure.keychain.helper;
 
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Environment;
 import android.support.v4.app.Fragment;
 import android.widget.Toast;
@@ -82,6 +84,39 @@ public class FileHelper {
         }
     }
 
+
+    /**
+     * Opens the storage browser on Android 4.4 or later for opening a file
+     * @param fragment
+     * @param last default selected file
+     * @param mimeType can be text/plain for example
+     * @param requestCode used to identify the result coming back from storage browser onActivityResult() in your
+     */
+    @TargetApi(Build.VERSION_CODES.KITKAT)
+    public static void openDocument(Fragment fragment, Uri last, String mimeType, int requestCode) {
+        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+        intent.setData(last);
+        intent.setType(mimeType);
+        fragment.startActivityForResult(intent, requestCode);
+    }
+
+    /**
+     * Opens the storage browser on Android 4.4 or later for saving a file
+     * @param fragment
+     * @param last default selected file
+     * @param mimeType can be text/plain for example
+     * @param requestCode used to identify the result coming back from storage browser onActivityResult() in your
+     */
+    @TargetApi(Build.VERSION_CODES.KITKAT)
+    public static void saveDocument(Fragment fragment, Uri last, String mimeType, int requestCode) {
+        Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+        intent.setData(last);
+        intent.setType(mimeType);
+        fragment.startActivityForResult(intent, requestCode);
+    }
+
     private static Intent buildFileIntent(String filename, String mimeType) {
         Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
         intent.addCategory(Intent.CATEGORY_OPENABLE);

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentService.java

@@ -788,7 +788,7 @@ public class KeychainIntentService extends IntentService
 
                 // InputStream
                 InputStream in = getContentResolver().openInputStream(providerUri);
-                return new InputData(in, PgpHelper.getLengthOfStream(in));
+                return new InputData(in, 0);
 
             default:
                 throw new PgpGeneralException("No target choosen!");

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFileFragment.java

@@ -20,10 +20,13 @@ package org.sufficientlysecure.keychain.ui;
 import android.app.Activity;
 import android.app.ProgressDialog;
 import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.Messenger;
+import android.provider.OpenableColumns;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -57,7 +60,9 @@ public class DecryptFileFragment extends DecryptFragment {
     private View mDecryptButton;
 
     private String mInputFilename = null;
+    private Uri mInputUri = null;
     private String mOutputFilename = null;
+    private Uri mOutputUri = null;
 
     private FileDialogFragment mFileDialog;
 
@@ -74,9 +79,13 @@ public class DecryptFileFragment extends DecryptFragment {
         mDecryptButton = view.findViewById(R.id.decrypt_file_action_decrypt);
         mBrowse.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
+                if (Constants.KITKAT) {
+                    FileHelper.openDocument(DecryptFileFragment.this, mInputUri, "*/*", RESULT_CODE_FILE);
+                } else {
                     FileHelper.openFile(DecryptFileFragment.this, mFilename.getText().toString(), "*/*",
                             RESULT_CODE_FILE);
                 }
+            }
         });
         mDecryptButton.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -98,20 +107,24 @@ public class DecryptFileFragment extends DecryptFragment {
         }
     }
 
-    private void guessOutputFilename() {
+    private String guessOutputFilename() {
-        mInputFilename = mFilename.getText().toString();
         File file = new File(mInputFilename);
         String filename = file.getName();
         if (filename.endsWith(".asc") || filename.endsWith(".gpg") || filename.endsWith(".pgp")) {
             filename = filename.substring(0, filename.length() - 4);
         }
-        mOutputFilename = Constants.Path.APP_DIR + "/" + filename;
+        return Constants.Path.APP_DIR + "/" + filename;
     }
 
     private void decryptAction() {
         String currentFilename = mFilename.getText().toString();
         if (mInputFilename == null || !mInputFilename.equals(currentFilename)) {
-            guessOutputFilename();
+            mInputUri = null;
+            mInputFilename = mFilename.getText().toString();
+        }
+
+        if (mInputUri == null) {
+            mOutputFilename = guessOutputFilename();
         }
 
         if (mInputFilename.equals("")) {
@@ -119,7 +132,7 @@ public class DecryptFileFragment extends DecryptFragment {
             return;
         }
 
-        if (mInputFilename.startsWith("file")) {
+        if (mInputUri == null && mInputFilename.startsWith("file")) {
             File file = new File(mInputFilename);
             if (!file.exists() || !file.isFile()) {
                 AppMsg.makeText(
@@ -141,7 +154,11 @@ public class DecryptFileFragment extends DecryptFragment {
             public void handleMessage(Message message) {
                 if (message.what == FileDialogFragment.MESSAGE_OKAY) {
                     Bundle data = message.getData();
+                    if (data.containsKey(FileDialogFragment.MESSAGE_DATA_URI)) {
+                        mOutputUri = data.getParcelable(FileDialogFragment.MESSAGE_DATA_URI);
+                    } else {
                         mOutputFilename = data.getString(FileDialogFragment.MESSAGE_DATA_FILENAME);
+                    }
                     decryptStart(null);
                 }
             }
@@ -170,13 +187,25 @@ public class DecryptFileFragment extends DecryptFragment {
         intent.setAction(KeychainIntentService.ACTION_DECRYPT_VERIFY);
 
         // data
-        data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_FILE);
-
         Log.d(Constants.TAG, "mInputFilename=" + mInputFilename + ", mOutputFilename="
-                + mOutputFilename);
+                + mOutputFilename + ",mInputUri=" + mInputUri + ", mOutputUri="
+                + mOutputUri);
 
+        if (mInputUri != null) {
+            data.putInt(KeychainIntentService.SOURCE, KeychainIntentService.IO_URI);
+            data.putParcelable(KeychainIntentService.ENCRYPT_INPUT_URI, mInputUri);
+        } else {
+            data.putInt(KeychainIntentService.SOURCE, KeychainIntentService.IO_FILE);
             data.putString(KeychainIntentService.ENCRYPT_INPUT_FILE, mInputFilename);
+        }
+
+        if (mOutputUri != null) {
+            data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_URI);
+            data.putParcelable(KeychainIntentService.ENCRYPT_OUTPUT_URI, mOutputUri);
+        } else {
+            data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_FILE);
             data.putString(KeychainIntentService.ENCRYPT_OUTPUT_FILE, mOutputFilename);
+        }
 
         data.putString(KeychainIntentService.DECRYPT_PASSPHRASE, passphrase);
 
@@ -232,6 +261,17 @@ public class DecryptFileFragment extends DecryptFragment {
         switch (requestCode) {
             case RESULT_CODE_FILE: {
                 if (resultCode == Activity.RESULT_OK && data != null) {
+                    if (Constants.KITKAT) {
+                        mInputUri = data.getData();
+                        Cursor cursor = getActivity().getContentResolver().query(mInputUri, new String[]{OpenableColumns.DISPLAY_NAME}, null, null, null);
+                        if (cursor != null) {
+                            if (cursor.moveToNext()) {
+                                mInputFilename = cursor.getString(0);
+                                mFilename.setText(mInputFilename);
+                            }
+                            cursor.close();
+                        }
+                    } else {
                         try {
                             String path = FileHelper.getPath(getActivity(), data.getData());
                             Log.d(Constants.TAG, "path=" + path);
@@ -241,6 +281,7 @@ public class DecryptFileFragment extends DecryptFragment {
                             Log.e(Constants.TAG, "Nullpointer while retrieving path!");
                         }
                     }
+                }
                 return;
             }
 

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFileFragment.java

@@ -20,11 +20,13 @@ package org.sufficientlysecure.keychain.ui;
 import android.app.Activity;
 import android.app.ProgressDialog;
 import android.content.Intent;
+import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.Messenger;
+import android.provider.OpenableColumns;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -73,7 +75,9 @@ public class EncryptFileFragment extends Fragment {
 
     // model
     private String mInputFilename = null;
+    private Uri mInputUri = null;
     private String mOutputFilename = null;
+    private Uri mOutputUri = null;
 
     @Override
     public void onAttach(Activity activity) {
@@ -104,9 +108,13 @@ public class EncryptFileFragment extends Fragment {
         mBrowse = (BootstrapButton) view.findViewById(R.id.btn_browse);
         mBrowse.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
+                if (Constants.KITKAT) {
+                    FileHelper.openDocument(EncryptFileFragment.this, mInputUri, "*/*", RESULT_CODE_FILE);
+                } else {
                     FileHelper.openFile(EncryptFileFragment.this, mFilename.getText().toString(), "*/*",
                             RESULT_CODE_FILE);
                 }
+            }
         });
 
         mFileCompression = (Spinner) view.findViewById(R.id.fileCompression);
@@ -178,7 +186,11 @@ public class EncryptFileFragment extends Fragment {
             public void handleMessage(Message message) {
                 if (message.what == FileDialogFragment.MESSAGE_OKAY) {
                     Bundle data = message.getData();
+                    if (data.containsKey(FileDialogFragment.MESSAGE_DATA_URI)) {
+                        mOutputUri = data.getParcelable(FileDialogFragment.MESSAGE_DATA_URI);
+                    } else {
                         mOutputFilename = data.getString(FileDialogFragment.MESSAGE_DATA_FILENAME);
+                    }
                     encryptStart();
                 }
             }
@@ -197,17 +209,20 @@ public class EncryptFileFragment extends Fragment {
     private void encryptClicked() {
         String currentFilename = mFilename.getText().toString();
         if (mInputFilename == null || !mInputFilename.equals(currentFilename)) {
+            mInputUri = null;
             mInputFilename = mFilename.getText().toString();
         }
 
+        if (mInputUri == null) {
             mOutputFilename = guessOutputFilename(mInputFilename);
+        }
 
         if (mInputFilename.equals("")) {
             AppMsg.makeText(getActivity(), R.string.no_file_selected, AppMsg.STYLE_ALERT).show();
             return;
         }
 
-        if (!mInputFilename.startsWith("content")) {
+        if (mInputUri == null && !mInputFilename.startsWith("content")) {
             File file = new File(mInputFilename);
             if (!file.exists() || !file.isFile()) {
                 AppMsg.makeText(
@@ -280,7 +295,25 @@ public class EncryptFileFragment extends Fragment {
         // fill values for this action
         Bundle data = new Bundle();
 
+        Log.d(Constants.TAG, "mInputFilename=" + mInputFilename + ", mOutputFilename="
+                + mOutputFilename + ",mInputUri=" + mInputUri + ", mOutputUri="
+                + mOutputUri);
+
+        if (mInputUri != null) {
+            data.putInt(KeychainIntentService.SOURCE, KeychainIntentService.IO_URI);
+            data.putParcelable(KeychainIntentService.ENCRYPT_INPUT_URI, mInputUri);
+        } else {
+            data.putInt(KeychainIntentService.SOURCE, KeychainIntentService.IO_FILE);
+            data.putString(KeychainIntentService.ENCRYPT_INPUT_FILE, mInputFilename);
+        }
+
+        if (mOutputUri != null) {
+            data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_URI);
+            data.putParcelable(KeychainIntentService.ENCRYPT_OUTPUT_URI, mOutputUri);
+        } else {
             data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_FILE);
+            data.putString(KeychainIntentService.ENCRYPT_OUTPUT_FILE, mOutputFilename);
+        }
 
         if (mEncryptInterface.isModeSymmetric()) {
             Log.d(Constants.TAG, "Symmetric encryption enabled!");
@@ -296,12 +329,6 @@ public class EncryptFileFragment extends Fragment {
                     mEncryptInterface.getEncryptionKeys());
         }
 
-        Log.d(Constants.TAG, "mInputFilename=" + mInputFilename + ", mOutputFilename="
-                + mOutputFilename);
-
-        data.putString(KeychainIntentService.ENCRYPT_INPUT_FILE, mInputFilename);
-        data.putString(KeychainIntentService.ENCRYPT_OUTPUT_FILE, mOutputFilename);
-
         boolean useAsciiArmor = mAsciiArmor.isChecked();
         data.putBoolean(KeychainIntentService.ENCRYPT_USE_ASCII_ARMOR, useAsciiArmor);
 
@@ -356,6 +383,17 @@ public class EncryptFileFragment extends Fragment {
         switch (requestCode) {
             case RESULT_CODE_FILE: {
                 if (resultCode == Activity.RESULT_OK && data != null) {
+                    if (Constants.KITKAT) {
+                        mInputUri = data.getData();
+                        Cursor cursor = getActivity().getContentResolver().query(mInputUri, new String[]{OpenableColumns.DISPLAY_NAME}, null, null, null);
+                        if (cursor != null) {
+                            if (cursor.moveToNext()) {
+                                mInputFilename = cursor.getString(0);
+                                mFilename.setText(mInputFilename);
+                            }
+                            cursor.close();
+                        }
+                    } else {
                         try {
                             String path = FileHelper.getPath(getActivity(), data.getData());
                             Log.d(Constants.TAG, "path=" + path);
@@ -365,6 +403,7 @@ public class EncryptFileFragment extends Fragment {
                             Log.e(Constants.TAG, "Nullpointer while retrieving path!");
                         }
                     }
+                }
                 return;
             }
 

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/FileDialogFragment.java

@@ -23,10 +23,13 @@ import android.app.Dialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
 import android.os.Bundle;
 import android.os.Message;
 import android.os.Messenger;
 import android.os.RemoteException;
+import android.provider.OpenableColumns;
 import android.support.v4.app.DialogFragment;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -50,6 +53,7 @@ public class FileDialogFragment extends DialogFragment {
 
     public static final int MESSAGE_OKAY = 1;
 
+    public static final String MESSAGE_DATA_URI = "uri";
     public static final String MESSAGE_DATA_FILENAME = "filename";
     public static final String MESSAGE_DATA_CHECKED = "checked";
 
@@ -60,6 +64,9 @@ public class FileDialogFragment extends DialogFragment {
     private CheckBox mCheckBox;
     private TextView mMessageTextView;
 
+    private String mOutputFilename;
+    private Uri mOutputUri;
+
     private static final int REQUEST_CODE = 0x00007004;
 
     /**
@@ -92,7 +99,7 @@ public class FileDialogFragment extends DialogFragment {
 
         String title = getArguments().getString(ARG_TITLE);
         String message = getArguments().getString(ARG_MESSAGE);
-        String defaultFile = getArguments().getString(ARG_DEFAULT_FILE);
+        mOutputFilename = getArguments().getString(ARG_DEFAULT_FILE);
         String checkboxText = getArguments().getString(ARG_CHECKBOX_TEXT);
 
         LayoutInflater inflater = (LayoutInflater) activity
@@ -106,15 +113,18 @@ public class FileDialogFragment extends DialogFragment {
         mMessageTextView.setText(message);
 
         mFilename = (EditText) view.findViewById(R.id.input);
-        mFilename.setText(defaultFile);
+        mFilename.setText(mOutputFilename);
         mBrowse = (BootstrapButton) view.findViewById(R.id.btn_browse);
         mBrowse.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 // only .asc or .gpg files
                 // setting it to text/plain prevents Cynaogenmod's file manager from selecting asc
                 // or gpg types!
-                FileHelper.openFile(FileDialogFragment.this, mFilename.getText().toString(), "*/*",
+                if (Constants.KITKAT) {
-                        REQUEST_CODE);
+                    FileHelper.saveDocument(FileDialogFragment.this, mOutputUri, "*/*", REQUEST_CODE);
+                } else {
+                    FileHelper.openFile(FileDialogFragment.this, mOutputFilename, "*/*", REQUEST_CODE);
+                }
             }
         });
 
@@ -136,13 +146,19 @@ public class FileDialogFragment extends DialogFragment {
             public void onClick(DialogInterface dialog, int id) {
                 dismiss();
 
-                boolean checked = false;
+                String currentFilename = mFilename.getText().toString();
-                if (mCheckBox.isEnabled()) {
+                if (mOutputFilename == null || !mOutputFilename.equals(currentFilename)) {
-                    checked = mCheckBox.isChecked();
+                    mOutputUri = null;
+                    mOutputFilename = mFilename.getText().toString();
                 }
 
+                boolean checked = mCheckBox.isEnabled() && mCheckBox.isChecked();
+
                 // return resulting data back to activity
                 Bundle data = new Bundle();
+                if (mOutputUri != null) {
+                    data.putParcelable(MESSAGE_DATA_URI, mOutputUri);
+                }
                 data.putString(MESSAGE_DATA_FILENAME, mFilename.getText().toString());
                 data.putBoolean(MESSAGE_DATA_CHECKED, checked);
 
@@ -178,6 +194,17 @@ public class FileDialogFragment extends DialogFragment {
         switch (requestCode & 0xFFFF) {
             case REQUEST_CODE: {
                 if (resultCode == Activity.RESULT_OK && data != null) {
+                    if (Constants.KITKAT) {
+                        mOutputUri = data.getData();
+                        Cursor cursor = getActivity().getContentResolver().query(mOutputUri, new String[]{OpenableColumns.DISPLAY_NAME}, null, null, null);
+                        if (cursor != null) {
+                            if (cursor.moveToNext()) {
+                                mOutputFilename = cursor.getString(0);
+                                mFilename.setText(mOutputFilename);
+                            }
+                            cursor.close();
+                        }
+                    } else {
                         try {
                             String path = data.getData().getPath();
                             Log.d(Constants.TAG, "path=" + path);
@@ -188,6 +215,7 @@ public class FileDialogFragment extends DialogFragment {
                             Log.e(Constants.TAG, "Nullpointer while retrieving path!", e);
                         }
                     }
+                }
 
                 break;
             }