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android - SQLCipherUtils.getDatabaseState 中带有 Room Persistence Library 异常的 SQLCipher

转载 作者:搜寻专家 更新时间:2023-11-01 09:22:40 28 4
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我的 Android 应用程序中有一个 Room 数据库,在我的 AppClass 中,我有一些检查数据库加密状态的逻辑,以便处理一些可能需要对数据库执行的潜在加密操作。但是,每当我在加密数据库上调用 SQLCipherUtils.getDatabaseState 时,它​​都会抛出 SQLiteException。但有趣的是,从 getDatabaseState 返回的状态不是 null 并且工作得很好,并且围绕对 getDatabaseState 的调用的 try-catch block 没有捕获异常。因此,据我所知,异常不会影响其余逻辑。但是,每次在数据库加密后启动应用程序时,都会在 LogCat 中看到此错误,这令人沮丧。所以我的问题是,这个错误实际上是否表明存在问题?如果是,我该如何修复它,如果不是,我如何消除错误?

Application 类中的数据库逻辑(第一行抛出的异常):

    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!");
}

异常(exception):

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

那是直接记录by SQLCipher for Android .任何时候使用无效密码都会被记录下来。 getDatabaseState() 尝试使用空字符串作为密码打开数据库,因为这是未加密数据库的“密码”。

避免此日志消息的选项是:

  • 不要为 Android 使用 SQLCipher,或者

  • 不要使用 getDatabaseState(),并确保用户永远不会提供无效的密码

关于android - SQLCipherUtils.getDatabaseState 中带有 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/

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