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Code Issues Projects Releases Wiki Activity

Store second copy of DB key in backup file.

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This commit is contained in:
akwizgran
2018-05-22 12:07:07 +01:00
parent b410b8efcc
commit b9e607744a
6 changed files with 47 additions and 35 deletions
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55
briar-android/src/main/java/org/briarproject/briar/android/controller/ConfigControllerImpl.java
View File

@@ -33,6 +33,7 @@ public class ConfigControllerImpl implements ConfigController {
private static final String DB_KEY_BACKUP_FILENAME = "db.key.bak";
private final SharedPreferences briarPrefs;
private final File dbKeyFile, dbKeyBackupFile;
protected final DatabaseConfig databaseConfig;
@Inject
@@ -40,6 +41,9 @@ public class ConfigControllerImpl implements ConfigController {
DatabaseConfig databaseConfig) {
this.briarPrefs = briarPrefs;
this.databaseConfig = databaseConfig;
File keyDir = databaseConfig.getDatabaseKeyDirectory();
dbKeyFile = new File(keyDir, DB_KEY_FILENAME);
dbKeyBackupFile = new File(keyDir, DB_KEY_BACKUP_FILENAME);
}
@Override
@@ -61,10 +65,10 @@ public class ConfigControllerImpl implements ConfigController {
@Nullable
private String getDatabaseKeyFromFile() {
String key = readDbKeyFromFile(getDbKeyFile());
String key = readDbKeyFromFile(dbKeyFile);
if (key == null) {
LOG.info("No database key in primary file");
key = readDbKeyFromFile(getDbKeyBackupFile());
key = readDbKeyFromFile(dbKeyBackupFile);
if (key == null) LOG.info("No database key in backup file");
else LOG.warning("Found database key in backup file");
} else {
@@ -91,16 +95,6 @@ public class ConfigControllerImpl implements ConfigController {
}
}
private File getDbKeyFile() {
return new File(databaseConfig.getDatabaseKeyDirectory(),
DB_KEY_FILENAME);
}
private File getDbKeyBackupFile() {
return new File(databaseConfig.getDatabaseKeyDirectory(),
DB_KEY_BACKUP_FILENAME);
}
private void migrateDatabaseKeyToFile(String key) {
if (storeEncryptedDatabaseKey(key)) {
if (briarPrefs.edit().remove(PREF_DB_KEY).commit())
@@ -114,39 +108,48 @@ public class ConfigControllerImpl implements ConfigController {
@Override
public boolean storeEncryptedDatabaseKey(String hex) {
LOG.info("Storing database key in file");
File dbKey = getDbKeyFile();
File dbKeyBackup = getDbKeyBackupFile();
// Create the directory if necessary
if (databaseConfig.getDatabaseKeyDirectory().mkdirs())
LOG.info("Created database key directory");
// If only the backup file exists, rename it so we don't overwrite it
if (dbKeyBackup.exists() && !dbKey.exists()) {
if (dbKeyBackup.renameTo(dbKey)) LOG.info("Renamed old backup");
if (dbKeyBackupFile.exists() && !dbKeyFile.exists()) {
if (dbKeyBackupFile.renameTo(dbKeyFile))
LOG.info("Renamed old backup");
else LOG.warning("Failed to rename old backup");
}
try {
// Write to the backup file
FileOutputStream out = new FileOutputStream(dbKeyBackup);
out.write(hex.getBytes("UTF-8"));
out.flush();
out.close();
writeDbKeyToFile(hex, dbKeyBackupFile);
LOG.info("Stored database key in backup file");
// Delete the old primary file, if it exists
if (dbKey.exists()) {
if (dbKey.delete()) LOG.info("Deleted primary file");
if (dbKeyFile.exists()) {
if (dbKeyFile.delete()) LOG.info("Deleted primary file");
else LOG.warning("Failed to delete primary file");
}
// The backup file becomes the new primary
boolean renamed = dbKeyBackup.renameTo(dbKey);
if (renamed) LOG.info("Renamed backup file to primary");
else LOG.warning("Failed to rename backup file to primary");
return renamed;
if (dbKeyBackupFile.renameTo(dbKeyFile)) {
LOG.info("Renamed backup file to primary");
} else {
LOG.warning("Failed to rename backup file to primary");
return false; // Don't overwrite our only copy
}
// Write a second copy to the backup file
writeDbKeyToFile(hex, dbKeyBackupFile);
LOG.info("Stored second copy of database key in backup file");
return true;
} catch (IOException e) {
if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
return false;
}
}
private void writeDbKeyToFile(String key, File f) throws IOException {
FileOutputStream out = new FileOutputStream(f);
out.write(key.getBytes("UTF-8"));
out.flush();
out.close();
}
@Override
public void deleteAccount(Context ctx) {
LOG.info("Deleting account");

3
briar-android/src/main/java/org/briarproject/briar/android/login/PasswordControllerImpl.java
View File

@@ -72,8 +72,7 @@ public class PasswordControllerImpl extends ConfigControllerImpl
} else {
String hex =
encryptDatabaseKey(new SecretKey(key), newPassword);
boolean stored = storeEncryptedDatabaseKey(hex);
resultHandler.onResult(stored);
resultHandler.onResult(storeEncryptedDatabaseKey(hex));
}
});
}