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Code Issues Releases Wiki Activity

Removed everything related to settings file encryption

Browse Source 
The plan is to (re)add this feature later. With a proven method to
encrypt files; maybe OpenPGP.
This commit is contained in:
cketti 2011-10-14 05:38:27 +02:00
parent fd16ff8fe6
commit 470ba8bb03
6 changed files with 19 additions and 218 deletions
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2
res/values/strings.xml
View File

@ -1030,8 +1030,6 @@ Welcome to K-9 Mail setup. K-9 is an open source mail client for Android origin
<string name="error_unable_to_connect">Unable to connect.</string>
<string name="import_export_action">Settings Import &amp; Export</string>
<string name="settings_export_encryption_password_prompt">Please enter a password to protect your exported settings:</string>
<string name="settings_import_encryption_password_prompt">Please enter the password you used when exporting your settings:</string>
<string name="settings_export_account">Export account settings</string>
<string name="settings_export_all">Export settings and accounts</string>
<string name="settings_import_dialog_title">Import</string>

57
src/com/fsck/k9/activity/Accounts.java
View File

@ -893,11 +893,7 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
}
private void onImport(Uri uri) {
//Toast.makeText(this, "Import is disabled for now", Toast.LENGTH_SHORT).show();
Log.i(K9.LOG_TAG, "onImport importing from URI " + uri.toString());
ListImportContentsAsyncTask asyncTask = new ListImportContentsAsyncTask(this, uri, null);
ListImportContentsAsyncTask asyncTask = new ListImportContentsAsyncTask(this, uri);
setNonConfigurationInstance(asyncTask);
asyncTask.execute();
}
@ -954,9 +950,8 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
}
}
private void showImportSelectionDialog(ImportContents importContents, Uri uri,
String encryptionKey) {
ImportSelectionDialog dialog = new ImportSelectionDialog(importContents, uri, encryptionKey);
private void showImportSelectionDialog(ImportContents importContents, Uri uri) {
ImportSelectionDialog dialog = new ImportSelectionDialog(importContents, uri);
dialog.show(this);
setNonConfigurationInstance(dialog);
}
@ -964,16 +959,14 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
private static class ImportSelectionDialog implements NonConfigurationInstance {
private ImportContents mImportContents;
private Uri mUri;
private String mEncryptionKey;
private Dialog mDialog;
private ListView mImportSelectionView;
private SparseBooleanArray mSelection;
ImportSelectionDialog(ImportContents importContents, Uri uri, String encryptionKey) {
ImportSelectionDialog(ImportContents importContents, Uri uri) {
mImportContents = importContents;
mUri = uri;
mEncryptionKey = encryptionKey;
}
@Override
@ -1069,7 +1062,7 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
activity.setNonConfigurationInstance(null);
ImportAsyncTask importAsyncTask = new ImportAsyncTask(activity,
includeGlobals, accountUuids, overwrite, mEncryptionKey, mUri);
includeGlobals, accountUuids, overwrite, mUri);
activity.setNonConfigurationInstance(importAsyncTask);
importAsyncTask.execute();
}
@ -1296,23 +1289,7 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
accountUuids.add(account.getUuid());
}
/* Disabled for now
// Prompt the user for a password
new PasswordEntryDialog(this,
getString(R.string.settings_export_encryption_password_prompt),
new PasswordEntryDialog.PasswordEntryListener() {
public void passwordChosen(final String chosenPassword) {
// Got the password. Now run export task in the background.
new ExportAsyncTask(includeGlobals, accountUuids, chosenPassword).execute();
}
public void cancel() {
// User cancelled the export. Nothing more to do.
}
})
.show();
*/
ExportAsyncTask asyncTask = new ExportAsyncTask(this, includeGlobals, accountUuids, null);
ExportAsyncTask asyncTask = new ExportAsyncTask(this, includeGlobals, accountUuids);
setNonConfigurationInstance(asyncTask);
asyncTask.execute();
}
@ -1323,16 +1300,14 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
private static class ExportAsyncTask extends ExtendedAsyncTask<Void, Void, Boolean> {
private boolean mIncludeGlobals;
private Set<String> mAccountUuids;
private String mEncryptionKey;
private String mFileName;
private ExportAsyncTask(Accounts activity, boolean includeGlobals,
Set<String> accountUuids, String encryptionKey) {
Set<String> accountUuids) {
super(activity);
mIncludeGlobals = includeGlobals;
mAccountUuids = accountUuids;
mEncryptionKey = encryptionKey;
}
@Override
@ -1346,7 +1321,7 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
protected Boolean doInBackground(Void... params) {
try {
mFileName = StorageExporter.exportToFile(mContext, mIncludeGlobals,
mAccountUuids, mEncryptionKey);
mAccountUuids);
} catch (StorageImportExportException e) {
Log.w(K9.LOG_TAG, "Exception during export", e);
return false;
@ -1381,18 +1356,15 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
private boolean mIncludeGlobals;
private List<String> mAccountUuids;
private boolean mOverwrite;
private String mEncryptionKey;
private Uri mUri;
private ImportResults mImportResults;
private ImportAsyncTask(Accounts activity, boolean includeGlobals,
List<String> accountUuids, boolean overwrite, String encryptionKey,
Uri uri) {
List<String> accountUuids, boolean overwrite, Uri uri) {
super(activity);
mIncludeGlobals = includeGlobals;
mAccountUuids = accountUuids;
mOverwrite = overwrite;
mEncryptionKey = encryptionKey;
mUri = uri;
}
@ -1409,7 +1381,7 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
InputStream is = mContext.getContentResolver().openInputStream(mUri);
try {
mImportResults = StorageImporter.importSettings(mContext, is,
mEncryptionKey, mIncludeGlobals, mAccountUuids, mOverwrite);
mIncludeGlobals, mAccountUuids, mOverwrite);
} finally {
try {
is.close();
@ -1456,14 +1428,12 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
private static class ListImportContentsAsyncTask extends ExtendedAsyncTask<Void, Void, Boolean> {
private Uri mUri;
private String mEncryptionKey;
private ImportContents mImportContents;
private ListImportContentsAsyncTask(Accounts activity, Uri uri, String encryptionKey) {
private ListImportContentsAsyncTask(Accounts activity, Uri uri) {
super(activity);
mUri = uri;
mEncryptionKey = encryptionKey;
}
@Override
@ -1479,8 +1449,7 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
ContentResolver resolver = mContext.getContentResolver();
InputStream is = resolver.openInputStream(mUri);
try {
mImportContents = StorageImporter.getImportStreamContents(mContext, is,
mEncryptionKey);
mImportContents = StorageImporter.getImportStreamContents(mContext, is);
} finally {
try {
is.close();
@ -1507,7 +1476,7 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
removeProgressDialog();
if (success) {
activity.showImportSelectionDialog(mImportContents, mUri, mEncryptionKey);
activity.showImportSelectionDialog(mImportContents, mUri);
} else {
String filename = mUri.getLastPathSegment();
//TODO: better error messages

78
src/com/fsck/k9/activity/PasswordEntryDialog.java
View File

@ -1,78 +0,0 @@
package com.fsck.k9.activity;
import com.fsck.k9.R;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class PasswordEntryDialog {
public interface PasswordEntryListener {
void passwordChosen(String chosenPassword);
void cancel();
}
PasswordEntryListener listener;
private EditText passwordView;
AlertDialog dialog;
public PasswordEntryDialog(Context context, String headerText, PasswordEntryListener listener) {
this.listener = listener;
View view = LayoutInflater.from(context).inflate(R.layout.password_entry_dialog, null);
Builder builder = new AlertDialog.Builder(context);
passwordView = (EditText)view.findViewById(R.id.password_text_box);
builder.setView(view);
builder.setPositiveButton(R.string.okay_action, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (PasswordEntryDialog.this.listener != null) {
String chosenPassword = passwordView.getText().toString();
PasswordEntryDialog.this.listener.passwordChosen(chosenPassword);
}
}
});
builder.setNegativeButton(R.string.cancel_action, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (PasswordEntryDialog.this.listener != null) {
PasswordEntryDialog.this.listener.cancel();
}
}
});
dialog = builder.create();
passwordView.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) { }
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
Button okButton = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
String chosenPassword = passwordView.getText().toString();
okButton.setEnabled(chosenPassword.length() > 0);
}
});
dialog.setMessage(headerText);
}
public void show() {
dialog.show();
Button okButton = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
okButton.setEnabled(false);
}
}

63
src/com/fsck/k9/preferences/K9Krypto.java
View File

@ -1,63 +0,0 @@
package com.fsck.k9.preferences;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class K9Krypto {
final Base64 mBase64;
final Cipher mCipher;
private final static String AES = "AES";
private final static String SECURE_RANDOM_TYPE = "SHA1PRNG";
public enum MODE {
ENCRYPT(Cipher.ENCRYPT_MODE), DECRYPT(Cipher.DECRYPT_MODE);
int mode;
private MODE(int nMode) {
mode = nMode;
}
}
public K9Krypto(String key, MODE mode) throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException {
mBase64 = new Base64();
KeyGenerator keyGenerator = KeyGenerator.getInstance(AES);
SecureRandom secureRandom = SecureRandom.getInstance(SECURE_RANDOM_TYPE);
secureRandom.setSeed(key.getBytes());
keyGenerator.init(128, secureRandom);
SecretKey secretKey = keyGenerator.generateKey();
byte[] processedKey = secretKey.getEncoded();
mCipher = setupCipher(mode.mode, processedKey);
}
public String encrypt(String plainText) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
byte[] encryptedText = mCipher.doFinal(plainText.getBytes());
byte[] encryptedEncodedText = mBase64.encode(encryptedText);
return new String(encryptedEncodedText);
}
public String decrypt(String encryptedEncodedText) throws IllegalBlockSizeException, BadPaddingException {
byte[] encryptedText = mBase64.decode(encryptedEncodedText.getBytes());
byte[] plainText = mCipher.doFinal(encryptedText);
return new String(plainText);
}
private Cipher setupCipher(int mode, byte[] processedKey) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
SecretKeySpec secretKeySpec = new SecretKeySpec(processedKey, AES);
Cipher cipher = Cipher.getInstance(AES);
cipher.init(mode, secretKeySpec);
return cipher;
}
}

21
src/com/fsck/k9/preferences/StorageExporter.java
View File

@ -12,7 +12,6 @@ import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.Map.Entry;
import javax.crypto.CipherOutputStream;
import org.xmlpull.v1.XmlSerializer;
import android.content.Context;
@ -77,7 +76,7 @@ public class StorageExporter {
public static String exportToFile(Context context, boolean includeGlobals,
Set<String> accountUuids, String encryptionKey)
Set<String> accountUuids)
throws StorageImportExportException {
OutputStream os = null;
@ -91,12 +90,7 @@ public class StorageExporter {
filename = file.getAbsolutePath();
os = new FileOutputStream(filename);
if (encryptionKey == null) {
exportPreferences(context, os, includeGlobals, accountUuids);
} else {
exportPreferencesEncrypted(context, os, includeGlobals, accountUuids,
encryptionKey);
}
// If all went well, we return the name of the file just written.
return filename;
@ -113,19 +107,6 @@ public class StorageExporter {
}
}
public static void exportPreferencesEncrypted(Context context, OutputStream os, boolean includeGlobals,
Set<String> accountUuids, String encryptionKey) throws StorageImportExportException {
try {
K9Krypto k = new K9Krypto(encryptionKey, K9Krypto.MODE.ENCRYPT);
CipherOutputStream cos = new CipherOutputStream(os, k.mCipher);
exportPreferences(context, cos, includeGlobals, accountUuids);
} catch (Exception e) {
throw new StorageImportExportException();
}
}
public static void exportPreferences(Context context, OutputStream os, boolean includeGlobals,
Set<String> accountUuids) throws StorageImportExportException {

14
src/com/fsck/k9/preferences/StorageImporter.java
View File

@ -35,7 +35,7 @@ public class StorageImporter {
/**
* Class to list the contents of an import file/stream.
*
* @see StorageImporter#getImportStreamContents(Context,InputStream,String)
* @see StorageImporter#getImportStreamContents(Context,InputStream)
*/
public static class ImportContents {
/**
@ -100,10 +100,6 @@ public class StorageImporter {
}
}
public static boolean isImportStreamEncrypted(Context context, InputStream inputStream) {
return false;
}
/**
* Parses an import {@link InputStream} and returns information on whether it contains global
* settings and/or account settings. For all account configurations found, the name of the
@ -111,12 +107,11 @@ public class StorageImporter {
*
* @param context
* @param inputStream
* @param encryptionKey
* @return
* @throws StorageImportExportException
*/
public static ImportContents getImportStreamContents(Context context, InputStream inputStream,
String encryptionKey) throws StorageImportExportException {
public static ImportContents getImportStreamContents(Context context, InputStream inputStream)
throws StorageImportExportException {
try {
// Parse the import stream but don't save individual settings (overview=true)
@ -151,13 +146,12 @@ public class StorageImporter {
*
* @param context
* @param inputStream
* @param encryptionKey
* @param globalSettings
* @param accountUuids
* @param overwrite
* @throws StorageImportExportException
*/
public static ImportResults importSettings(Context context, InputStream inputStream, String encryptionKey,
public static ImportResults importSettings(Context context, InputStream inputStream,
boolean globalSettings, List<String> accountUuids, boolean overwrite)
throws StorageImportExportException {