msb-public
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FairEmail
mirror of https://github.com/M66B/FairEmail.git
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Code Issues Projects Releases Wiki Activity

Encrypted export

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pull/146/head
M66B 7 years ago
parent 49bfdb93ba
commit b11fa12466
4 changed files with 146 additions and 43 deletions
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2
FAQ.md
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@ -24,7 +24,7 @@ For:
* Notifications per account
* Fixed action bar conversations
* Password protected export file
* Password protected export file: next release
* Keep conversations open (for previous/next navigation)
* Microsoft OAuth

129
app/src/main/java/eu/faircode/email/FragmentSetup.java
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@ -46,6 +46,7 @@ import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.ToggleButton;
@ -59,10 +60,20 @@ import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.security.SecureRandom;
import java.security.spec.KeySpec;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
@ -99,6 +110,9 @@ public class FragmentSetup extends FragmentEx {
private Drawable check;
private static final int KEY_ITERATIONS = 65536;
private static final int KEY_LENGTH = 256;
private static final String[] permissions = new String[]{
Manifest.permission.READ_CONTACTS
};
@ -423,17 +437,34 @@ public class FragmentSetup extends FragmentEx {
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
public void onActivityResult(final int requestCode, int resultCode, final Intent data) {
Log.i(Helper.TAG, "Request=" + requestCode + " result=" + resultCode + " data=" + data);
if (requestCode == ActivitySetup.REQUEST_EXPORT) {
if (resultCode == RESULT_OK && data != null)
handleExport(data);
} else if (requestCode == ActivitySetup.REQUEST_IMPORT) {
if (resultCode == RESULT_OK && data != null)
handleImport(data);
}
if (requestCode == ActivitySetup.REQUEST_EXPORT || requestCode == ActivitySetup.REQUEST_IMPORT)
if (resultCode == RESULT_OK && data != null) {
final View dview = LayoutInflater.from(getContext()).inflate(R.layout.dialog_password, null);
new DialogBuilderLifecycle(getContext(), getViewLifecycleOwner())
.setView(dview)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
EditText etPassword1 = dview.findViewById(R.id.etPassword1);
EditText etPassword2 = dview.findViewById(R.id.etPassword2);
String password1 = etPassword1.getText().toString();
String password2 = etPassword2.getText().toString();
if (password1.equals(password2))
if (requestCode == ActivitySetup.REQUEST_EXPORT)
handleExport(data, password1);
else
handleImport(data, password1);
else
Snackbar.make(view, R.string.title_setup_password_different, Snackbar.LENGTH_LONG).show();
}
})
.show();
} else
Snackbar.make(view, R.string.title_canceled, Snackbar.LENGTH_LONG).show();
}
private void onMenuPrivacy() {
@ -448,20 +479,11 @@ public class FragmentSetup extends FragmentEx {
private void onMenuExport() {
if (Helper.isPro(getContext()))
new DialogBuilderLifecycle(getContext(), getViewLifecycleOwner())
.setMessage(R.string.title_setup_export_do)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
try {
startActivityForResult(getIntentExport(), ActivitySetup.REQUEST_EXPORT);
} catch (Throwable ex) {
Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
}
}
})
.create()
.show();
try {
startActivityForResult(getIntentExport(), ActivitySetup.REQUEST_EXPORT);
} catch (Throwable ex) {
Helper.unexpectedError(getContext(), ex);
}
else {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.content_frame, new FragmentPro()).addToBackStack("pro");
@ -470,20 +492,11 @@ public class FragmentSetup extends FragmentEx {
}
private void onMenuImport() {
new DialogBuilderLifecycle(getContext(), getViewLifecycleOwner())
.setMessage(R.string.title_setup_import_do)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
try {
startActivityForResult(getIntentImport(), ActivitySetup.REQUEST_IMPORT);
} catch (Throwable ex) {
Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
}
}
})
.create()
.show();
try {
startActivityForResult(getIntentImport(), ActivitySetup.REQUEST_IMPORT);
} catch (Throwable ex) {
Helper.unexpectedError(getContext(), ex);
}
}
private void onMenuAbout() {
@ -521,19 +534,36 @@ public class FragmentSetup extends FragmentEx {
.putExtra(Settings.EXTRA_APP_PACKAGE, context.getPackageName());
}
private void handleExport(Intent data) {
private void handleExport(Intent data, String password) {
Bundle args = new Bundle();
args.putParcelable("uri", data.getData());
args.putString("password", password);
new SimpleTask<Void>() {
@Override
protected Void onLoad(Context context, Bundle args) throws Throwable {
Uri uri = args.getParcelable("uri");
String password = args.getString("password");
OutputStream out = null;
try {
Log.i(Helper.TAG, "Writing URI=" + uri);
out = getContext().getContentResolver().openOutputStream(uri);
byte[] salt = new byte[16];
SecureRandom random = new SecureRandom();
random.nextBytes(salt);
// https://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#Cipher
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, KEY_ITERATIONS, KEY_LENGTH);
SecretKey secret = keyFactory.generateSecret(keySpec);
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, secret);
OutputStream raw = getContext().getContentResolver().openOutputStream(uri);
raw.write(salt);
raw.write(cipher.getIV());
out = new CipherOutputStream(raw, cipher);
DB db = DB.getInstance(context);
@ -602,21 +632,38 @@ public class FragmentSetup extends FragmentEx {
}.load(this, args);
}
private void handleImport(Intent data) {
private void handleImport(Intent data, String password) {
Bundle args = new Bundle();
args.putParcelable("uri", data.getData());
args.putString("password", password);
new SimpleTask<Void>() {
@Override
protected Void onLoad(Context context, Bundle args) throws Throwable {
Uri uri = args.getParcelable("uri");
String password = args.getString("password");
InputStream in = null;
try {
Log.i(Helper.TAG, "Reading URI=" + uri);
ContentResolver resolver = getContext().getContentResolver();
AssetFileDescriptor descriptor = resolver.openTypedAssetFileDescriptor(uri, "*/*", null);
in = descriptor.createInputStream();
InputStream raw = descriptor.createInputStream();
byte[] salt = new byte[16];
byte[] prefix = new byte[16];
raw.read(salt);
raw.read(prefix);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, KEY_ITERATIONS, KEY_LENGTH);
SecretKey secret = keyFactory.generateSecret(keySpec);
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec(prefix);
cipher.init(Cipher.DECRYPT_MODE, secret, iv);
in = new CipherInputStream(raw, cipher);
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder response = new StringBuilder();

53
app/src/main/res/layout/dialog_password.xml
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@ -0,0 +1,53 @@
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="12dp">
<TextView
android:id="@+id/tvPassword1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/title_setup_password"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/etPassword1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tvPassword1" />
<TextView
android:id="@+id/tvPassword2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:text="@string/title_setup_password_repeat"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/etPassword1" />
<EditText
android:id="@+id/etPassword2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tvPassword2" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:text="@string/title_setup_import_do"
android:textAppearance="@style/TextAppearance.AppCompat.Small"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/etPassword2" />
</androidx.constraintlayout.widget.ConstraintLayout>

5
app/src/main/res/values/strings.xml
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@ -70,8 +70,10 @@
<string name="title_setup">Setup</string>
<string name="title_setup_export">Export settings</string>
<string name="title_setup_import">Import settings</string>
<string name="title_setup_export_do">Accounts and identities will be exported without passwords</string>
<string name="title_setup_import_do">Imported accounts will be added, not overwritten</string>
<string name="title_setup_password">Password</string>
<string name="title_setup_password_repeat">Repeat password</string>
<string name="title_setup_password_different">Passwords different</string>
<string name="title_setup_exported">Settings exported</string>
<string name="title_setup_imported">Settings imported</string>
<string name="title_setup_account">Manage accounts</string>
@ -323,6 +325,7 @@
<string name="title_yes">Yes</string>
<string name="title_no">No</string>
<string name="title_undo">Undo</string>
<string name="title_canceled">Canceled</string>
<string name="title_try">Try FairEmail, an open source, privacy friendly email app for Android</string>

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