toad.city
That fuck shit the fascists are using
1package org.tm.archive.backup;
2
3import android.content.Context;
4import android.os.Build;
5
6import androidx.annotation.NonNull;
7import androidx.annotation.Nullable;
8
9import org.signal.core.util.logging.Log;
10import org.tm.archive.crypto.KeyStoreHelper;
11import org.tm.archive.util.TextSecurePreferences;
12
13/**
14 * Allows the getting and setting of the backup passphrase, which is stored encrypted on API >= 23.
15 */
16public final class BackupPassphrase {
17
18 private BackupPassphrase() {
19 }
20
21 private static final String TAG = Log.tag(BackupPassphrase.class);
22
23 public static @Nullable String get(@NonNull Context context) {
24 String passphrase = TextSecurePreferences.getBackupPassphrase(context);
25 String encryptedPassphrase = TextSecurePreferences.getEncryptedBackupPassphrase(context);
26
27 if (Build.VERSION.SDK_INT < 23 || (passphrase == null && encryptedPassphrase == null)) {
28 return stripSpaces(passphrase);
29 }
30
31 if (encryptedPassphrase == null) {
32 Log.i(TAG, "Migrating to encrypted passphrase.");
33 set(context, passphrase);
34 encryptedPassphrase = TextSecurePreferences.getEncryptedBackupPassphrase(context);
35 if (encryptedPassphrase == null) throw new AssertionError("Passphrase migration failed");
36 }
37
38 KeyStoreHelper.SealedData data = KeyStoreHelper.SealedData.fromString(encryptedPassphrase);
39 return stripSpaces(new String(KeyStoreHelper.unseal(data)));
40 }
41
42 public static void set(@NonNull Context context, @Nullable String passphrase) {
43 if (passphrase == null || Build.VERSION.SDK_INT < 23) {
44 TextSecurePreferences.setBackupPassphrase(context, passphrase);
45 TextSecurePreferences.setEncryptedBackupPassphrase(context, null);
46 } else {
47 KeyStoreHelper.SealedData encryptedPassphrase = KeyStoreHelper.seal(passphrase.getBytes());
48 TextSecurePreferences.setEncryptedBackupPassphrase(context, encryptedPassphrase.serialize());
49 TextSecurePreferences.setBackupPassphrase(context, null);
50 }
51 }
52
53 private static String stripSpaces(@Nullable String passphrase) {
54 return passphrase != null ? passphrase.replace(" ", "") : null;
55 }
56}