[NFC Hacking] madfish73:
[2014-03-13] back to Nfc.apk mod again( since xposed won't work under KitKat ART mode)

http://xdaforums.com/showpost.php?p=51047371&postcount=404

No more hacking, no more mod(nfc mod, still need AnyTag mod), with Xposed(you can download XposedInstaller.apk in that thread), you just need to install a plugin :

[2014-02-10, compatiable with AOKP kitkat 4.4.2]

(I've modified this plugin to support tag removal detecting, so you don't need nfc.apk mod any more)

[2013-10-25 updated, Add Intent broadcast to support "Tasker Intent receiver", pk.qwerty12.nfclockscreenoffenabler.TAG_EVENT, Extras: state=discovered/lost, uid=XXXXXXXX(HEX of tag id), Tasker variables: %state, %uid]

[2013-10-24 updated, Add Intent broadcast to support "Tasker Intent receiver", pk.qwerty12.nfclockscreenoffenabler.TAG_DISCOVERED_XXXX, pk.qwerty12.nfclockscreenoffenabler.TAG_LOST_XXXX(where XXXX is the HEX of specified tag id). Don't need AnyTag anymore, with tasker you can receive Intent when tag discovered or tag lost]

[2013-10-22 updated, Add support for LG G2 (D802 - internationnal version), merged with MohammadAG's code]

[2013-10-09 updated, NOW ALSO compatible with android 4.1 and before. The Apk version is still v1.4 ]

[2013-09-20 updated, add tag presence check timeout setting, this can help for battery saving.]

[2013-09-05 updated, modified by MohammadAG, added taglost sound option]

View attachment 2570901

View attachment 2570900

the testing for battery consumption effected by tag presence check timeout setting(GalaxyNexus JB4.3 stock ROM)

timeout stock setting: 125ms

wifi off, put phone on tag all night

begin time: 01:36 battery: 97%

end time : 10:26 battery: 34%

battery consumption per hour: 7.134%

timeout custom setting: 20 seconds

wifi off, put phone on tag all night

begin time: 23:27 battery: 98%

end time : 08:03 battery: 56%

battery consumption per hour: 4.884%

timeout custom setting: 4 seconds

wifi off, put phone on tag all night

begin time: 00:11 battery: 97%

end time : 08:12 battery: 54%

battery consumption per hour: 5.364%

Battery consumption without nfc tag(Galaxy Nexus JB4.3 Stock ROM)

reboot, wifi off, Disable Nfc

begin time 23:56 battery: 98%

end time 07:30 battery: 90%

battery consumption per hour: 1.056%

reboot, wifi off, Nfc on, Disable nfc when screen off

begin time 23:03 battery: 96%

end time 07:30 battery: 86%

battery consumption per hour: 1.182%

reboot, wifi off, Nfc on, Enable nfc when screen off

begin time 23:10 battery: 100%

end time 07:30 battery: 86%

battery consumption per hour: 1.68%

Thanks to rovo89 for his great work - Xposed!

and thanks to Neuer_User for his suggestion.

The code of the plugin module NFCLockscreenoffEnabler.apk is based on the Xposed mod of NFC lock screen: https://github.com/qwerty12/NFCLockscreenoffEnabler/, thanks to the author of it.

1. install Xposed

2. install NFCLockScreenOffEnabler

3. Checked NFCLockScreenOffEnabler in Xposed

4. set options you want.

5. reboot

5. still need AnyTag mod version, or you can install new version of ReTag, it supports tag lost message now!!

What this mod can do?

after did this mod, with AnyTag(mod) + tasker + secure settings plugin + secure settings helper, you can:

1. put your phone on the "Bedside tag", your phone turn to silence mod, take the phone off the tag, your phone auto turn off silence mod

2. put your phone on the "CarDock tag", your phone auto unlock, turn to CarHome mode, run some special apps, take the phone off the tag, your phone auto kill some special apps, exit carhome mode, lock screen ...

3. Other things you can image....

How to receive tag discovered Intent with Tasker?

Tasker->profiles->add->Event->System->Intent Received->Action=pk.qwerty12.nfclockscreenoffenabler.TAG_DISCOVERED_XXXXXXXX

where XXXXXXXX = HEX string of your tag id, like: 00AABBCC

How to receive tag lost Intent with Tasker?

Tasker->profiles->add->Event->System->Intent Received->Action=pk.qwerty12.nfclockscreenoffenabler.TAG_LOST_XXXXXXXX

where XXXXXXXX = HEX string of your tag id, like: 00AABBCC

How to use tasker to auto unlock your phone and run some apps?

tasker + secure settings plugin + secure settings helper

Create task, add actions:

1. Secure Settings, Screen & Keyboard Lights On 5 seconds

2. Wait 60ms

3. Secure Settins, Keyguard Enabled

4. Wait 100ms

5. Secure Settings, Keyguard Disabled/BG

6. run apps ....

7. do things you want ...

8. Secure Settings, Screen & Keyboard Light On 10 Seconds

...

..

How to do that

1. Download the mod AnyTag.apk from attachments. Install it.

2. Download the mod Nfc.apk (device dependence) from attachments, copy it to /system/app/Nfc.apk, reboot

download modified anytag.apk: View attachment 1767289

=====================obsolete =============================

#download modified Nfc.apk:

#AOKP ROMs

#Galaxy Nexus 4.1.2 AOKP: View attachment 1700757

#Galaxy Nexus 4.2.1 AOKP: View attachment 1767293

#Galaxy Nexus 4.2.2 AOKP: View attachment 1767294

#

#InsertCoin

#HOX InsertCoinV17 4.1.1(not test): View attachment 1888138

#

#Stock ROMs

#Galaxy Nexus 4.2.1 (thanks for LoveNFC): View attachment 1775040

#Galaxy Nexus 4.2.1 Tag lost with no sound: View attachment 1781195

#Galaxy Nexus 4.2.2 : View attachment 1789263

#Google Nexus4 4.2.2 (thanks for LoveNFC): View attachment 1775041

#Google Nexus4 4.2.2 Tag lost with no sound: View attachment 1781196

#Galaxy Note2 N719 4.1.1 : View attachment 1767296

#Galaxy Note2 N7100 4.1.2 : View attachment 1783180

#Galaxy Note2 Sprint 4.1.2 : View attachment 1789345

#Galaxy Note2 LTE(N7105 XXDMB2) 4.1.2 : View attachment 1789415

#Galaxy S3 i747 4.1.1 (thanks for klau1): View attachment 1772381

#Galaxy S3 4.1.2 (tested by fruitloopy) : View attachment 1871597

#

#Others

#4.1.2-N7100UBDMB1-CRISKELO-v14--->same as----

#---->AmnoSferum_9.0.1_Mescaline_XXDMD2: View attachment 2037376

#Nexus4 PurityV5.5: View attachment 2059453

#

#3. Download tasker, Secure settings plugin for tasker, Secure Settings Helper

#

#Video demo

#

#

"Bedside Tag": http://youtu.be/_c9Lo-jwErg

galaxy note2(china telecom N719): http://youtu.be/UlbxGoGjysI

TouchStone& "Carmode Tag": http://youtu.be/zeJZ_Cy7_mM

ES Ftp Tag with PC react: http://www.youtube.com/watch?v=_1oN2vmHwtY

Mod Details:

1. mod nfc.apk(mod android source code and rebuild), when tag lost, broadcast intent with action "android.nfc.action.TAG_LOST"

2. mod AnyTag NFC Launcher apk, play a trick with TagId, when intent action is "TAG_LOST", Tagid=Tagid + "_TAG_LOST", otherwise, Tagid = Tagid + "_TAG_DISCOVERED"

=====================obsolete =============================

apk mod --------------------Step by Step(Note2, Windows)---------------------------------

1. tools needed

baksmali and smali

apktool (1.5.1)

WinRAR

2. copy /system/framework from phone to PC folder like D:\qlg\Dev\android\note2(N719)\framework\

3. copy /system/app/Nfc.apk, Nfc.odex to d:\temp\mod\

4. cmd box, cd d:\temp\mod\

5. java -jar D:\tools\android\baksmali1.4.1\baksmali-1.4.1.jar -d D:\qlg\Dev\android\note2(N719)\framework -x -b Nfc.odex

this will decompile Nfc.odex to d:\temp\mod\out\

6. d:\tools\android\apktool\apktool1.5.1\apktool.bat d -f --frame-path D:\qlg\Dev\android\note2(N719)\framework Nfc.apk

this will decompile Nfc.apk to d:\temp\mod\Nfc\

7. copy taglost.ogg to d:\temp\mod\Nfc\res\raw\

8. edit d:\temp\mod\Nfc\res\values\public.xml add

<public type="raw" name="taglost" id="0x7f040006" />

9. cd d:\tools\android\apktool\apktool1.5.1\

apktool.bat b d:\temp\mod\Nfc\ d:\temp\mod\Nfc-mod.apk

10. modify smali files in path d:\temp\mod\out\

files need to modify:

NativeNfcManager.smali

NativeNfcTag$PresenceCheckWatchdog.smali

NativeNfcTag.smali

DeviceHost$DeviceHostListener.smali

DeviceHost$TagEndpoint.smali

DeviceHost.smali

NfcDispatcher$DispatchInfo.smali

NfcDispatcher.smali

NfcService$NfcServiceHandler.smali

NfcService.smali

R$raw.smali

you can use BeyondCompare to help you do the modification.

This is the original smali files and modified smali files of N7100 v4.1.2, compare it with your Nfc smali files, and you will know which place need to modify.

View attachment 2219314

be aware with lines contain something like "access$xxxx", make sure the number xxx matching your actual number.

11. cd d:\temp\mod

12. java -jar D:\tools\android\baksmali1.4.1\smali-1.4.1.jar -o classes.dex out

this will compile smali files in d:\temp\mod\out , and generate d:\temp\mod\classes.dex

13. rename stock apk, d:\temp\mod\Nfc.apk--> Nfc.apk.zip，open it with WinRAR,

rename d:\temp\mod\Nfc-mod.apk -->Nfc-mod.apk.zip，open it with WinRAR

14. drag resources.arsc and res\raw\taglost.ogg from Nfc-mod.apk.zip into Nfc.apk.zip, drag d:\temp\mod\classes.dex into Nfc.apk.zip, when WinRAR popup the options window, choose the compression mode as Store

15、rename Nfc.apk.zip to Nfc.apk, copy it to your phone /system/app, delete /system/app/Nfc.odex, change Nfc.apk permission rw-r--r--

16、reboot

OK, as Orphee said, we should not abandon old things, maybe they would be useful when it's the time you need them.

Here, I've found another way to mod nfc.apk, we touch less files this time - only 4 files:

NativeNfcTag$PresenceCheckWatchdog.smali

NativeNfcTag.smali

DeviceHost$TagEndpoint.smali

NfcService$NfcServiceHandler.smali

Details : View attachment 2216272