android - SQLCipherUtils.getDatabaseState中具有Room Persistence Library异常的SQLCipher

我的android应用程序中有一个room数据库，在appclass中，我有一些逻辑来检查数据库加密状态，以便处理一些可能需要对数据库执行的加密操作。但是，每当我在加密的数据库上调用sqlcipherutils.getdatabasestate时，它就会抛出一个sqliteexception。但有趣的是，从getdatabasestate返回的状态不是空的，并且工作得非常好，并且围绕getdatabasestate调用的try-catch块没有捕获异常。因此，从我所知，异常不会影响其他逻辑。然而，每当应用程序在数据库加密后启动时，这个错误就会出现在logcat中，这令人沮丧。所以我的问题是，这个错误实际上是一个问题吗？如果是的话，我该如何解决，如果不是，我该如何消除错误？
应用程序类中的数据库逻辑（在第一行引发异常）：

    try {
        // Get database state
        SQLCipherUtils.State state = SQLCipherUtils.getDatabaseState(getApplicationContext(), DB_NAME);

        // Check whether database is encrypted
        if (state == SQLCipherUtils.State.UNENCRYPTED) {
            // If it's unencrypted, encrypt the database
            try {
                // Get database instance
                FinancesDatabase db = FinancesDatabase.getDatabase(getApplicationContext());

                // Close database
                db.close();

                // Encrypt database with encryption key
                SQLCipherUtils.encrypt(getApplicationContext(), DB_NAME, sharedPrefs.getEncryptKey());
                Timber.i("Successfully encrypted database!");

            } catch (IOException e) {
                Timber.e(e, "Failed to encrypt previously unencrypted database!");
            }
        } else if (state == SQLCipherUtils.State.ENCRYPTED)
            // Otherwise, good to go
            Timber.i("Database is encrypted.  No action necessary.");

        else if (state == SQLCipherUtils.State.DOES_NOT_EXIST)
            // No database found.  Normal if first launch
            Timber.w("No database found.");

    } catch(Exception e) {
        Timber.e(e, "Failed to get database encryption state!");
    }

例外情况：

E/Database: file is not a database: , while compiling: select count(*) from sqlite_master;
net.sqlcipher.database.SQLiteException: file is not a database: , while compiling: select count(*) from sqlite_master;
    at net.sqlcipher.database.SQLiteCompiledSql.native_compile(Native Method)
    at net.sqlcipher.database.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)
    at net.sqlcipher.database.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64)
    at net.sqlcipher.database.SQLiteProgram.<init>(SQLiteProgram.java:89)
    at net.sqlcipher.database.SQLiteQuery.<init>(SQLiteQuery.java:48)
    at net.sqlcipher.database.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:60)
    at net.sqlcipher.database.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1867)
    at net.sqlcipher.database.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1785)
    at net.sqlcipher.database.SQLiteDatabase.keyDatabase(SQLiteDatabase.java:2486)
    at net.sqlcipher.database.SQLiteDatabase.openDatabaseInternal(SQLiteDatabase.java:2415)
    at net.sqlcipher.database.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1149)
    at net.sqlcipher.database.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1116)
    at net.sqlcipher.database.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1065)
    at net.sqlcipher.database.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1019)
    at com.commonsware.cwac.saferoom.SQLCipherUtils.getDatabaseState(SQLCipherUtils.java:62)
    at com.commonsware.cwac.saferoom.SQLCipherUtils.getDatabaseState(SQLCipherUtils.java:46)
    at edu.usm.cs.csc414.pocketfinances.AppClass.onCreate(AppClass.java:118)
    at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1125)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6056)
    at android.app.ActivityThread.-wrap1(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1764)
    at android.os.Handler.dispatchMessage(Handler.java:105)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6938)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

库中的SqlCipherUtils.GetDatabaseState实现：

public static State getDatabaseState(Context ctxt, String dbName) {
    SQLiteDatabase.loadLibs(ctxt);

    return(getDatabaseState(ctxt.getDatabasePath(dbName)));
}



public static State getDatabaseState(File dbPath) {
    if (dbPath.exists()) {
      SQLiteDatabase db=null;

      try {
        db=
          SQLiteDatabase.openDatabase(dbPath.getAbsolutePath(), "",
            null, SQLiteDatabase.OPEN_READONLY);

        db.getVersion();

        return(State.UNENCRYPTED);
      }
      catch (Exception e) {
        return(State.ENCRYPTED);
      }
      finally {
        if (db != null) {
          db.close();
        }
      }
    }

    return(State.DOES_NOT_EXIST);
}

最佳答案

直接记录到by SQLCipher for Android。它将在任何时候记录一个无效的密码短语被使用。getDatabaseState()尝试以空字符串作为密码短语打开数据库，因为这是未加密数据库的“密码短语”。
避免此日志消息的选项包括：
不要在android上使用sqlcipher，或者
不要使用getDatabaseState()，还要确保用户从不提供无效的密码短语

关于android - SQLCipherUtils.getDatabaseState中具有Room Persistence Library异常的SQLCipher，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/53452700/