Android Question RandomAccessFile string encryption

[Devv]

Sub Activity_Create(FirstTime As Boolean)
Dim raf As RandomAccessFile
Dim test As String

   raf.Initialize(File.DirRootExternal, "test.dat", False)
   'Dim list2 As List
   test = raf.ReadEncryptedObject("some secret password", raf.CurrentPosition)
   Log(test)
   raf.Close

End Sub

** Activity (main) Create, isFirst = true **
main_activity_create (B4A line: 46)
test = raf.ReadEncryptedObject("some secret pas
java.lang.OutOfMemoryError
at anywheresoftware.b4a.randomaccessfile.RandomAccessFile.readHelper(RandomAccessFile.java:408)
at anywheresoftware.b4a.randomaccessfile.RandomAccessFile.ReadEncryptedObject(RandomAccessFile.java:403)
at b4a.example.main._activity_create(main.java:353)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:187)
at b4a.example.main.afterFirstLayout(main.java:102)
at b4a.example.main.access$000(main.java:17)
at b4a.example.main$WaitForLayout.run(main.java:80)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
at dalvik.system.NativeStart.main(Native Method)

the list example worked ok, what i'am doing wrong with my code ?

 

[KMatle]

If the file contains a list then you must read it back into a list (which works as you say). A string is not a list...

Could you post the code with you have written the file?

 

[Devv]

If the file contains a list then you must read it back into a list (which works as you say). A string is not a list...

Could you post the code with you have written the file?

test.dat content

nPC061YtJAH1l6NYZDmZ4dgGv5v+zIZLozvNsAAGJEs=

original string: test1234
key: 1234
made with: http://aesencryption.net/

 

[Erel]

You can only use this method with files created with RAF.WriteEncryptedObject.

 

[Devv]

You can only use this method with files created with RAF.WriteEncryptedObject.

what is an easy way/method to decrypt a string with b4a when that string is not ecrypted with b4a ?

 

[Erel]

There are many encryption algorithms. You need to choose one that is supported by the Encryption library.

For example:
https://www.b4x.com/android/forum/threads/aes-sample.6855/page-2#post-157491