mirror of https://github.com/M66B/FairEmail.git
Refactoring
This commit is contained in:
M66B
parent
1f3deab967
commit
38902a5cd9
|
|
@ -5853,11 +5853,11 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
|
|||
Log.i("Opening uri=" + uri + " title=" + title);
|
||||
uri = Uri.parse(uri.toString().replaceAll("\\s+", ""));
|
||||
|
||||
if (StyleHelper.isProtectedContent(uri)) {
|
||||
if (ProtectedContent.isProtectedContent(uri)) {
|
||||
Bundle args = new Bundle();
|
||||
args.putParcelable("uri", uri);
|
||||
|
||||
FragmentDialogBase dialog = new StyleHelper.FragmentDialogDecrypt();
|
||||
FragmentDialogBase dialog = new ProtectedContent.FragmentDialogDecrypt();
|
||||
dialog.setArguments(args);
|
||||
dialog.show(parentFragment.getParentFragmentManager(), "decrypt");
|
||||
return true;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,321 @@
|
|||
package eu.faircode.email;
|
||||
|
||||
/*
|
||||
This file is part of FairEmail.
|
||||
|
||||
FairEmail is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
FairEmail is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with FairEmail. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
Copyright 2018-2022 by Marcel Bokhorst (M66B)
|
||||
*/
|
||||
|
||||
import android.app.Dialog;
|
||||
import android.content.Context;
|
||||
import android.graphics.drawable.Drawable;
|
||||
import android.net.Uri;
|
||||
import android.os.Bundle;
|
||||
import android.text.Editable;
|
||||
import android.text.Spannable;
|
||||
import android.text.Spanned;
|
||||
import android.text.TextUtils;
|
||||
import android.text.TextWatcher;
|
||||
import android.text.method.ArrowKeyMovementMethod;
|
||||
import android.text.style.URLSpan;
|
||||
import android.util.Base64;
|
||||
import android.view.GestureDetector;
|
||||
import android.view.KeyEvent;
|
||||
import android.view.LayoutInflater;
|
||||
import android.view.MotionEvent;
|
||||
import android.view.View;
|
||||
import android.view.WindowManager;
|
||||
import android.view.inputmethod.EditorInfo;
|
||||
import android.widget.Button;
|
||||
import android.widget.TextView;
|
||||
|
||||
import androidx.annotation.NonNull;
|
||||
import androidx.annotation.Nullable;
|
||||
import androidx.appcompat.app.AlertDialog;
|
||||
|
||||
import com.google.android.material.textfield.TextInputLayout;
|
||||
|
||||
import org.jsoup.nodes.Element;
|
||||
|
||||
import java.nio.ByteBuffer;
|
||||
import java.nio.charset.StandardCharsets;
|
||||
import java.security.InvalidAlgorithmParameterException;
|
||||
import java.security.InvalidKeyException;
|
||||
import java.security.NoSuchAlgorithmException;
|
||||
import java.security.SecureRandom;
|
||||
import java.security.spec.InvalidKeySpecException;
|
||||
import java.security.spec.KeySpec;
|
||||
|
||||
import javax.crypto.BadPaddingException;
|
||||
import javax.crypto.Cipher;
|
||||
import javax.crypto.IllegalBlockSizeException;
|
||||
import javax.crypto.NoSuchPaddingException;
|
||||
import javax.crypto.SecretKey;
|
||||
import javax.crypto.SecretKeyFactory;
|
||||
import javax.crypto.spec.GCMParameterSpec;
|
||||
import javax.crypto.spec.IvParameterSpec;
|
||||
import javax.crypto.spec.PBEKeySpec;
|
||||
|
||||
public class ProtectedContent {
|
||||
static final int MAX_PROTECTED_TEXT = 1500;
|
||||
private static final int DECRYPT_ITERATIONS = 120000;
|
||||
private static final int DECRYPT_KEYLEN = 256;
|
||||
private static final String DECRYPT_DERIVATION = "PBKDF2WithHmacSHA512";
|
||||
private static final int DECRYPT_TAGLEN = 128;
|
||||
private static final String DECRYPT_TRANSFORMATION = "AES/GCM/NoPadding";
|
||||
private static final String DECRYPT_URL = "https://fairemail.net/decrypt/";
|
||||
|
||||
static Uri toUri(Context context, String html, String password)
|
||||
throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidAlgorithmParameterException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
|
||||
if (html.length() > MAX_PROTECTED_TEXT)
|
||||
throw new IllegalArgumentException(context.getString(R.string.title_style_protect_size));
|
||||
|
||||
SecureRandom random = new SecureRandom();
|
||||
|
||||
byte[] salt = new byte[16]; // 128 bits
|
||||
random.nextBytes(salt);
|
||||
|
||||
byte[] iv = new byte[12]; // 96 bites
|
||||
random.nextBytes(iv);
|
||||
|
||||
// Iterations = 120,000; Keylength = 256 bits = 32 bytes
|
||||
PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), salt, DECRYPT_ITERATIONS, DECRYPT_KEYLEN);
|
||||
|
||||
SecretKeyFactory skf = SecretKeyFactory.getInstance(DECRYPT_DERIVATION);
|
||||
SecretKey key = skf.generateSecret(spec);
|
||||
|
||||
// Authentication tag length = 128 bits = 16 bytes
|
||||
GCMParameterSpec parameterSpec = new GCMParameterSpec(DECRYPT_TAGLEN, iv);
|
||||
|
||||
final Cipher cipher = Cipher.getInstance(DECRYPT_TRANSFORMATION);
|
||||
cipher.init(Cipher.ENCRYPT_MODE, key, parameterSpec);
|
||||
|
||||
byte[] cipherText = cipher.doFinal(html.getBytes(StandardCharsets.UTF_8));
|
||||
|
||||
ByteBuffer out = ByteBuffer.allocate(1 + salt.length + iv.length + cipherText.length);
|
||||
out.put((byte) 1); // version
|
||||
out.put(salt);
|
||||
out.put(iv);
|
||||
out.put(cipherText);
|
||||
|
||||
String fragment = Base64.encodeToString(out.array(), Base64.URL_SAFE | Base64.NO_WRAP);
|
||||
return Uri.parse(DECRYPT_URL + "#" + fragment);
|
||||
}
|
||||
|
||||
static String fromUri(Context context, Uri uri, String password) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidAlgorithmParameterException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
|
||||
byte[] msg = Base64.decode(uri.getFragment(), Base64.URL_SAFE | Base64.NO_WRAP);
|
||||
|
||||
int version = msg[0];
|
||||
if (version > 1)
|
||||
throw new IllegalArgumentException("Please update the app");
|
||||
|
||||
byte[] salt = new byte[16]; // 128 bits
|
||||
System.arraycopy(msg, 1, salt, 0, salt.length);
|
||||
|
||||
byte[] iv = new byte[12]; // 96 bites
|
||||
System.arraycopy(msg, 1 + salt.length, iv, 0, iv.length);
|
||||
|
||||
byte[] encrypted = new byte[msg.length - 1 - salt.length - iv.length];
|
||||
System.arraycopy(msg, 1 + salt.length + iv.length, encrypted, 0, encrypted.length);
|
||||
|
||||
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DECRYPT_DERIVATION);
|
||||
KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, DECRYPT_ITERATIONS, DECRYPT_KEYLEN);
|
||||
SecretKey secret = keyFactory.generateSecret(keySpec);
|
||||
Cipher cipher = Cipher.getInstance(DECRYPT_TRANSFORMATION);
|
||||
IvParameterSpec ivSpec = new IvParameterSpec(iv);
|
||||
cipher.init(Cipher.DECRYPT_MODE, secret, ivSpec);
|
||||
byte[] decrypted = cipher.doFinal(encrypted);
|
||||
|
||||
return new String(decrypted, StandardCharsets.UTF_8);
|
||||
}
|
||||
|
||||
static boolean isProtectedContent(Uri uri) {
|
||||
return uri.toString().startsWith(DECRYPT_URL);
|
||||
}
|
||||
|
||||
public static final class FragmentDialogDecrypt extends FragmentDialogBase {
|
||||
@NonNull
|
||||
@Override
|
||||
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
|
||||
Bundle args = getArguments();
|
||||
|
||||
final Context context = getContext();
|
||||
final View view = LayoutInflater.from(context).inflate(R.layout.dialog_decrypt, null);
|
||||
final TextInputLayout tilPassword = view.findViewById(R.id.tilPassword);
|
||||
final Button btnDecrypt = view.findViewById(R.id.btnDecrypt);
|
||||
final TextView tvContent = view.findViewById(R.id.tvContent);
|
||||
final TextView tvError = view.findViewById(R.id.tvError);
|
||||
final TextView tvErrorDetail = view.findViewById(R.id.tvErrorDetail);
|
||||
|
||||
tilPassword.setVisibility(View.VISIBLE);
|
||||
btnDecrypt.setVisibility(View.VISIBLE);
|
||||
tvContent.setVisibility(View.GONE);
|
||||
tvError.setVisibility(View.GONE);
|
||||
tvErrorDetail.setVisibility(View.GONE);
|
||||
|
||||
String password = args.getString("password");
|
||||
tilPassword.getEditText().setText(password);
|
||||
btnDecrypt.setEnabled(!TextUtils.isEmpty(password));
|
||||
|
||||
tilPassword.getEditText().addTextChangedListener(new TextWatcher() {
|
||||
@Override
|
||||
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
|
||||
// Do nothing
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onTextChanged(CharSequence s, int start, int before, int count) {
|
||||
// Do nothing
|
||||
}
|
||||
|
||||
@Override
|
||||
public void afterTextChanged(Editable s) {
|
||||
String password = s.toString();
|
||||
btnDecrypt.setEnabled(!TextUtils.isEmpty(password));
|
||||
args.putString("password", password);
|
||||
}
|
||||
});
|
||||
|
||||
btnDecrypt.setEnabled(false);
|
||||
|
||||
tvContent.setMovementMethod(new ArrowKeyMovementMethod() {
|
||||
private GestureDetector gestureDetector = new GestureDetector(context,
|
||||
new GestureDetector.SimpleOnGestureListener() {
|
||||
@Override
|
||||
public boolean onSingleTapUp(MotionEvent event) {
|
||||
return onClick(event);
|
||||
}
|
||||
|
||||
private boolean onClick(MotionEvent event) {
|
||||
Spannable buffer = (Spannable) tvContent.getText();
|
||||
int off = Helper.getOffset(tvContent, buffer, event);
|
||||
|
||||
URLSpan[] link = buffer.getSpans(off, off, URLSpan.class);
|
||||
if (link.length > 0) {
|
||||
String url = link[0].getURL();
|
||||
Uri uri = Uri.parse(url);
|
||||
|
||||
int start = buffer.getSpanStart(link[0]);
|
||||
int end = buffer.getSpanEnd(link[0]);
|
||||
String title = (start < 0 || end < 0 || end <= start
|
||||
? null : buffer.subSequence(start, end).toString());
|
||||
if (url.equals(title))
|
||||
title = null;
|
||||
|
||||
Bundle args = new Bundle();
|
||||
args.putParcelable("uri", uri);
|
||||
args.putString("title", title);
|
||||
|
||||
FragmentDialogOpenLink fragment = new FragmentDialogOpenLink();
|
||||
fragment.setArguments(args);
|
||||
fragment.show(getParentFragmentManager(), "open:link");
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
});
|
||||
|
||||
@Override
|
||||
public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
|
||||
return gestureDetector.onTouchEvent(event);
|
||||
}
|
||||
});
|
||||
|
||||
btnDecrypt.setOnClickListener(new View.OnClickListener() {
|
||||
@Override
|
||||
public void onClick(View v) {
|
||||
new SimpleTask<Spanned>() {
|
||||
@Override
|
||||
protected void onPreExecute(Bundle args) {
|
||||
tilPassword.setEnabled(false);
|
||||
btnDecrypt.setEnabled(false);
|
||||
tvError.setVisibility(View.GONE);
|
||||
tvErrorDetail.setVisibility(View.GONE);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onPostExecute(Bundle args) {
|
||||
tilPassword.setEnabled(true);
|
||||
btnDecrypt.setEnabled(true);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Spanned onExecute(Context context, Bundle args) throws Throwable {
|
||||
Uri uri = args.getParcelable("uri");
|
||||
String password = args.getString("password");
|
||||
|
||||
String html = ProtectedContent.fromUri(context, uri, password);
|
||||
|
||||
return HtmlHelper.fromHtml(html, new HtmlHelper.ImageGetterEx() {
|
||||
@Override
|
||||
public Drawable getDrawable(Element element) {
|
||||
return ImageHelper.decodeImage(context,
|
||||
-1, element, true, 0, 1.0f, tvContent);
|
||||
}
|
||||
}, null, context);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onExecuted(Bundle args, Spanned content) {
|
||||
tilPassword.setVisibility(View.GONE);
|
||||
btnDecrypt.setVisibility(View.GONE);
|
||||
tvContent.setText(content);
|
||||
tvContent.setVisibility(View.VISIBLE);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onException(Bundle args, Throwable ex) {
|
||||
tvError.setText(ex.getMessage());
|
||||
tvErrorDetail.setText(ex.toString());
|
||||
tvError.setVisibility(View.VISIBLE);
|
||||
tvErrorDetail.setVisibility(View.VISIBLE);
|
||||
}
|
||||
}.execute(FragmentDialogDecrypt.this, args, "decypt");
|
||||
}
|
||||
});
|
||||
|
||||
tilPassword.getEditText().setOnEditorActionListener(new TextView.OnEditorActionListener() {
|
||||
@Override
|
||||
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
|
||||
if (actionId == EditorInfo.IME_ACTION_DONE) {
|
||||
btnDecrypt.performClick();
|
||||
return true;
|
||||
} else
|
||||
return false;
|
||||
}
|
||||
});
|
||||
|
||||
if (!TextUtils.isEmpty(password))
|
||||
btnDecrypt.post(new Runnable() {
|
||||
@Override
|
||||
public void run() {
|
||||
btnDecrypt.performClick();
|
||||
}
|
||||
});
|
||||
|
||||
Dialog dialog = new AlertDialog.Builder(context)
|
||||
.setView(view)
|
||||
.setNegativeButton(android.R.string.cancel, null)
|
||||
.create();
|
||||
|
||||
dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
|
||||
|
||||
return dialog;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -19,7 +19,6 @@ package eu.faircode.email;
|
|||
Copyright 2018-2022 by Marcel Bokhorst (M66B)
|
||||
*/
|
||||
|
||||
import android.app.Dialog;
|
||||
import android.content.Context;
|
||||
import android.content.DialogInterface;
|
||||
import android.content.Intent;
|
||||
|
|
@ -41,7 +40,6 @@ import android.text.Spanned;
|
|||
import android.text.TextPaint;
|
||||
import android.text.TextUtils;
|
||||
import android.text.TextWatcher;
|
||||
import android.text.method.ArrowKeyMovementMethod;
|
||||
import android.text.style.AlignmentSpan;
|
||||
import android.text.style.BackgroundColorSpan;
|
||||
import android.text.style.BulletSpan;
|
||||
|
|
@ -57,22 +55,17 @@ import android.text.style.URLSpan;
|
|||
import android.text.style.UnderlineSpan;
|
||||
import android.util.Base64;
|
||||
import android.util.Pair;
|
||||
import android.view.GestureDetector;
|
||||
import android.view.KeyEvent;
|
||||
import android.view.LayoutInflater;
|
||||
import android.view.MenuItem;
|
||||
import android.view.MotionEvent;
|
||||
import android.view.SubMenu;
|
||||
import android.view.View;
|
||||
import android.view.WindowManager;
|
||||
import android.view.inputmethod.EditorInfo;
|
||||
import android.widget.Button;
|
||||
import android.widget.EditText;
|
||||
import android.widget.TextView;
|
||||
import android.widget.Toast;
|
||||
|
||||
import androidx.annotation.NonNull;
|
||||
import androidx.annotation.Nullable;
|
||||
import androidx.appcompat.app.AlertDialog;
|
||||
import androidx.appcompat.widget.PopupMenu;
|
||||
import androidx.core.content.ContextCompat;
|
||||
|
|
@ -89,32 +82,13 @@ import org.jsoup.nodes.Document;
|
|||
import org.jsoup.nodes.Element;
|
||||
|
||||
import java.io.ByteArrayOutputStream;
|
||||
import java.nio.ByteBuffer;
|
||||
import java.nio.charset.StandardCharsets;
|
||||
import java.security.SecureRandom;
|
||||
import java.security.spec.KeySpec;
|
||||
import java.util.ArrayList;
|
||||
import java.util.Arrays;
|
||||
import java.util.Collections;
|
||||
import java.util.List;
|
||||
import java.util.Locale;
|
||||
|
||||
import javax.crypto.Cipher;
|
||||
import javax.crypto.SecretKey;
|
||||
import javax.crypto.SecretKeyFactory;
|
||||
import javax.crypto.spec.GCMParameterSpec;
|
||||
import javax.crypto.spec.IvParameterSpec;
|
||||
import javax.crypto.spec.PBEKeySpec;
|
||||
|
||||
public class StyleHelper {
|
||||
private static final int MAX_PROTECTED_TEXT = 1500;
|
||||
private static final int DECRYPT_ITERATIONS = 120000;
|
||||
private static final int DECRYPT_KEYLEN = 256;
|
||||
private static final String DECRYPT_DERIVATION = "PBKDF2WithHmacSHA512";
|
||||
private static final int DECRYPT_TAGLEN = 128;
|
||||
private static final String DECRYPT_TRANSFORMATION = "AES/GCM/NoPadding";
|
||||
private static final String DECRYPT_URL = "https://fairemail.net/decrypt/";
|
||||
|
||||
private static final List<Class<?>> CLEAR_STYLES = Collections.unmodifiableList(Arrays.asList(
|
||||
StyleSpan.class,
|
||||
UnderlineSpan.class,
|
||||
|
|
@ -598,11 +572,11 @@ public class StyleHelper {
|
|||
}
|
||||
|
||||
boolean toolong = false;
|
||||
if (end - start > MAX_PROTECTED_TEXT) {
|
||||
if (end - start > ProtectedContent.MAX_PROTECTED_TEXT) {
|
||||
toolong = true;
|
||||
} else {
|
||||
String html = getProtectedContent((Spanned) edit.subSequence(start, end));
|
||||
if (html.length() > MAX_PROTECTED_TEXT)
|
||||
if (html.length() > ProtectedContent.MAX_PROTECTED_TEXT)
|
||||
toolong = true;
|
||||
}
|
||||
if (toolong) {
|
||||
|
|
@ -637,52 +611,18 @@ public class StyleHelper {
|
|||
args.putInt("start", start);
|
||||
args.putInt("end", end);
|
||||
|
||||
new SimpleTask<String>() {
|
||||
new SimpleTask<Uri>() {
|
||||
@Override
|
||||
protected String onExecute(Context context, Bundle args) throws Throwable {
|
||||
protected Uri onExecute(Context context, Bundle args) throws Throwable {
|
||||
Spanned text = (Spanned) args.getCharSequence("text");
|
||||
String password = args.getString("password");
|
||||
|
||||
String html = getProtectedContent(text);
|
||||
if (html.length() > MAX_PROTECTED_TEXT)
|
||||
throw new IllegalArgumentException(context.getString(R.string.title_style_protect_size));
|
||||
|
||||
SecureRandom random = new SecureRandom();
|
||||
|
||||
byte[] salt = new byte[16]; // 128 bits
|
||||
random.nextBytes(salt);
|
||||
|
||||
byte[] iv = new byte[12]; // 96 bites
|
||||
random.nextBytes(iv);
|
||||
|
||||
// Iterations = 120,000; Keylength = 256 bits = 32 bytes
|
||||
PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), salt, DECRYPT_ITERATIONS, DECRYPT_KEYLEN);
|
||||
|
||||
SecretKeyFactory skf = SecretKeyFactory.getInstance(DECRYPT_DERIVATION);
|
||||
SecretKey key = skf.generateSecret(spec);
|
||||
|
||||
// Authentication tag length = 128 bits = 16 bytes
|
||||
GCMParameterSpec parameterSpec = new GCMParameterSpec(DECRYPT_TAGLEN, iv);
|
||||
|
||||
final Cipher cipher = Cipher.getInstance(DECRYPT_TRANSFORMATION);
|
||||
cipher.init(Cipher.ENCRYPT_MODE, key, parameterSpec);
|
||||
|
||||
byte[] cipherText = cipher.doFinal(html.getBytes(StandardCharsets.UTF_8));
|
||||
|
||||
ByteBuffer out = ByteBuffer.allocate(1 + salt.length + iv.length + cipherText.length);
|
||||
out.put((byte) 1); // version
|
||||
out.put(salt);
|
||||
out.put(iv);
|
||||
out.put(cipherText);
|
||||
|
||||
String fragment = Base64.encodeToString(out.array(), Base64.URL_SAFE | Base64.NO_WRAP);
|
||||
String url = DECRYPT_URL + "#" + fragment;
|
||||
|
||||
return url;
|
||||
return ProtectedContent.toUri(context, html, password);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onExecuted(Bundle args, String url) {
|
||||
protected void onExecuted(Bundle args, Uri uri) {
|
||||
if (etBody.getSelectionStart() != start ||
|
||||
etBody.getSelectionEnd() != end)
|
||||
return;
|
||||
|
|
@ -690,7 +630,7 @@ public class StyleHelper {
|
|||
String title = context.getString(R.string.title_decrypt);
|
||||
edit.delete(start, end);
|
||||
edit.insert(start, title);
|
||||
edit.setSpan(new URLSpan(url), start, start + title.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
||||
edit.setSpan(new URLSpan(uri.toString()), start, start + title.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
||||
etBody.setSelection(start + title.length());
|
||||
}
|
||||
|
||||
|
|
@ -1478,203 +1418,5 @@ public class StyleHelper {
|
|||
}
|
||||
}
|
||||
|
||||
public static boolean isProtectedContent(Uri uri) {
|
||||
return uri.toString().startsWith(DECRYPT_URL);
|
||||
}
|
||||
|
||||
public static final class FragmentDialogDecrypt extends FragmentDialogBase {
|
||||
@NonNull
|
||||
@Override
|
||||
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
|
||||
Bundle args = getArguments();
|
||||
|
||||
final Context context = getContext();
|
||||
final View view = LayoutInflater.from(context).inflate(R.layout.dialog_decrypt, null);
|
||||
final TextInputLayout tilPassword = view.findViewById(R.id.tilPassword);
|
||||
final Button btnDecrypt = view.findViewById(R.id.btnDecrypt);
|
||||
final TextView tvContent = view.findViewById(R.id.tvContent);
|
||||
final TextView tvError = view.findViewById(R.id.tvError);
|
||||
final TextView tvErrorDetail = view.findViewById(R.id.tvErrorDetail);
|
||||
|
||||
tilPassword.setVisibility(View.VISIBLE);
|
||||
btnDecrypt.setVisibility(View.VISIBLE);
|
||||
tvContent.setVisibility(View.GONE);
|
||||
tvError.setVisibility(View.GONE);
|
||||
tvErrorDetail.setVisibility(View.GONE);
|
||||
|
||||
String password = args.getString("password");
|
||||
tilPassword.getEditText().setText(password);
|
||||
btnDecrypt.setEnabled(!TextUtils.isEmpty(password));
|
||||
|
||||
tilPassword.getEditText().addTextChangedListener(new TextWatcher() {
|
||||
@Override
|
||||
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
|
||||
// Do nothing
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onTextChanged(CharSequence s, int start, int before, int count) {
|
||||
// Do nothing
|
||||
}
|
||||
|
||||
@Override
|
||||
public void afterTextChanged(Editable s) {
|
||||
String password = s.toString();
|
||||
btnDecrypt.setEnabled(!TextUtils.isEmpty(password));
|
||||
args.putString("password", password);
|
||||
}
|
||||
});
|
||||
|
||||
btnDecrypt.setEnabled(false);
|
||||
|
||||
tvContent.setMovementMethod(new ArrowKeyMovementMethod() {
|
||||
private GestureDetector gestureDetector = new GestureDetector(context,
|
||||
new GestureDetector.SimpleOnGestureListener() {
|
||||
@Override
|
||||
public boolean onSingleTapUp(MotionEvent event) {
|
||||
return onClick(event);
|
||||
}
|
||||
|
||||
private boolean onClick(MotionEvent event) {
|
||||
Spannable buffer = (Spannable) tvContent.getText();
|
||||
int off = Helper.getOffset(tvContent, buffer, event);
|
||||
|
||||
URLSpan[] link = buffer.getSpans(off, off, URLSpan.class);
|
||||
if (link.length > 0) {
|
||||
String url = link[0].getURL();
|
||||
Uri uri = Uri.parse(url);
|
||||
|
||||
int start = buffer.getSpanStart(link[0]);
|
||||
int end = buffer.getSpanEnd(link[0]);
|
||||
String title = (start < 0 || end < 0 || end <= start
|
||||
? null : buffer.subSequence(start, end).toString());
|
||||
if (url.equals(title))
|
||||
title = null;
|
||||
|
||||
Bundle args = new Bundle();
|
||||
args.putParcelable("uri", uri);
|
||||
args.putString("title", title);
|
||||
|
||||
FragmentDialogOpenLink fragment = new FragmentDialogOpenLink();
|
||||
fragment.setArguments(args);
|
||||
fragment.show(getParentFragmentManager(), "open:link");
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
});
|
||||
|
||||
@Override
|
||||
public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
|
||||
return gestureDetector.onTouchEvent(event);
|
||||
}
|
||||
});
|
||||
|
||||
btnDecrypt.setOnClickListener(new View.OnClickListener() {
|
||||
@Override
|
||||
public void onClick(View v) {
|
||||
new SimpleTask<Spanned>() {
|
||||
@Override
|
||||
protected void onPreExecute(Bundle args) {
|
||||
tilPassword.setEnabled(false);
|
||||
btnDecrypt.setEnabled(false);
|
||||
tvError.setVisibility(View.GONE);
|
||||
tvErrorDetail.setVisibility(View.GONE);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onPostExecute(Bundle args) {
|
||||
tilPassword.setEnabled(true);
|
||||
btnDecrypt.setEnabled(true);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Spanned onExecute(Context context, Bundle args) throws Throwable {
|
||||
Uri uri = args.getParcelable("uri");
|
||||
String password = args.getString("password");
|
||||
|
||||
byte[] msg = Base64.decode(uri.getFragment(), Base64.URL_SAFE | Base64.NO_WRAP);
|
||||
|
||||
int version = msg[0];
|
||||
|
||||
byte[] salt = new byte[16]; // 128 bits
|
||||
System.arraycopy(msg, 1, salt, 0, salt.length);
|
||||
|
||||
byte[] iv = new byte[12]; // 96 bites
|
||||
System.arraycopy(msg, 1 + salt.length, iv, 0, iv.length);
|
||||
|
||||
byte[] encrypted = new byte[msg.length - 1 - salt.length - iv.length];
|
||||
System.arraycopy(msg, 1 + salt.length + iv.length, encrypted, 0, encrypted.length);
|
||||
|
||||
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DECRYPT_DERIVATION);
|
||||
KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, DECRYPT_ITERATIONS, DECRYPT_KEYLEN);
|
||||
SecretKey secret = keyFactory.generateSecret(keySpec);
|
||||
Cipher cipher = Cipher.getInstance(DECRYPT_TRANSFORMATION);
|
||||
IvParameterSpec ivSpec = new IvParameterSpec(iv);
|
||||
cipher.init(Cipher.DECRYPT_MODE, secret, ivSpec);
|
||||
byte[] decrypted = cipher.doFinal(encrypted);
|
||||
|
||||
String html = new String(decrypted, StandardCharsets.UTF_8);
|
||||
|
||||
return HtmlHelper.fromHtml(html, new HtmlHelper.ImageGetterEx() {
|
||||
@Override
|
||||
public Drawable getDrawable(Element element) {
|
||||
return ImageHelper.decodeImage(context,
|
||||
-1, element, true, 0, 1.0f, tvContent);
|
||||
}
|
||||
}, null, context);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onExecuted(Bundle args, Spanned content) {
|
||||
tilPassword.setVisibility(View.GONE);
|
||||
btnDecrypt.setVisibility(View.GONE);
|
||||
tvContent.setText(content);
|
||||
tvContent.setVisibility(View.VISIBLE);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onException(Bundle args, Throwable ex) {
|
||||
tvError.setText(ex.getMessage());
|
||||
tvErrorDetail.setText(ex.toString());
|
||||
tvError.setVisibility(View.VISIBLE);
|
||||
tvErrorDetail.setVisibility(View.VISIBLE);
|
||||
}
|
||||
}.execute(FragmentDialogDecrypt.this, args, "decypt");
|
||||
}
|
||||
});
|
||||
|
||||
tilPassword.getEditText().setOnEditorActionListener(new TextView.OnEditorActionListener() {
|
||||
@Override
|
||||
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
|
||||
if (actionId == EditorInfo.IME_ACTION_DONE) {
|
||||
btnDecrypt.performClick();
|
||||
return true;
|
||||
} else
|
||||
return false;
|
||||
}
|
||||
});
|
||||
|
||||
if (!TextUtils.isEmpty(password))
|
||||
btnDecrypt.post(new Runnable() {
|
||||
@Override
|
||||
public void run() {
|
||||
btnDecrypt.performClick();
|
||||
}
|
||||
});
|
||||
|
||||
Dialog dialog = new AlertDialog.Builder(context)
|
||||
.setView(view)
|
||||
.setNegativeButton(android.R.string.cancel, null)
|
||||
.create();
|
||||
|
||||
dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
|
||||
|
||||
return dialog;
|
||||
}
|
||||
}
|
||||
|
||||
//TextUtils.dumpSpans(text, new LogPrinter(android.util.Log.INFO, "FairEmail"), "afterTextChanged ");
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue