解决sqlcipher从3.5.9升级到4.0.1引起的崩溃问题

2019年6月9日 339次阅读来源: 自然V简单

由于客户对移动端的数据库有加密需求，并且最近要优化性能，所以升级了net.zetetic:android-database-sqlcipher库，但是却造成程序崩溃，异常如下：

Caused by: 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:1954)

at net.sqlcipher.database.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1840)

at net.sqlcipher.database.SQLiteDatabase.keyDatabase(SQLiteDatabase.java:2571)

at net.sqlcipher.database.SQLiteDatabase.openDatabaseInternal(SQLiteDatabase.java:2502)

at net.sqlcipher.database.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1204)

at net.sqlcipher.database.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1258)

at net.sqlcipher.database.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1253)

at net.sqlcipher.database.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1238)

at net.sqlcipher.database.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1274)

at org.penguin.project.sqlcipher.MainActivity.InitializeSQLCipher(MainActivity.java:34)

at org.penguin.project.sqlcipher.MainActivity.onCreate(MainActivity.java:18)

at android.app.Activity.performCreate(Activity.java:7436)

at android.app.Activity.performCreate(Activity.java:7426)

at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1286)

at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3279)

at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3484)

at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86)

at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)

at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2123)

at android.os.Handler.dispatchMessage(Handler.java:109)

at android.os.Looper.loop(Looper.java:207)

at android.app.ActivityThread.main(ActivityThread.java:7470)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:958)

经过研究发现，可以通过以下代码解决崩溃问题：

SQLiteDatabase database = SQLiteDatabase.openOrCreateDatabase(databasePath, ZeteticApplication.DATABASE_PASSWORD, null, new SQLiteDatabaseHook() {

@Override

public void preKey(SQLiteDatabase database) {

}

@Override

public void postKey(SQLiteDatabase database) {

database.execSQL(“PRAGMA cipher_page_size = 1024”);

database.execSQL(“PRAGMA kdf_iter = 64000”);

database.execSQL(“PRAGMA cipher_hmac_algorithm = HMAC_SHA1”);

database.execSQL(“PRAGMA cipher_kdf_algorithm = PBKDF2_HMAC_SHA1”);

}

});

至于涉及到到greendao如何解决，明天再研究下，如果需要弄清楚参数的作用，请参考下面的网址：

https://www.zetetic.net/sqlcipher/sqlcipher-api/#key

另外提醒下，PRAGMA部分的语句必须放在postKey方法中执行，否则也会崩溃。

    原文作者：自然V简单
    原文地址: https://www.jianshu.com/p/9579f9cef85b
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