Android Checkin

Android Checkin allows you to register a Google account with a device, as if it was done from the device.

Most of the code for the checkin process is from android-checkin. However, the original code no longer works since Google has changed the authentication process to require encrypted password (vs. plaintext). This repository includes a tool for encrypting Google account passwords in the same fashion as GoogleLoginService.

The password encryption method is the reverse-engineered version of gapps-jb-20130813-signed/system/app/GoogleLoginService/smali/com/google/android/gsf/loginservice/Password_Encrypter.smali (aka Android 4.3 JellyBean). It has not been tested on Lollipop but seems to also work for KitKat (4.4).

The mimicked device is a MotoX Gen 1. Also added BLE as one of the hardware components for increased compatbility with applications.

GoogleLoginService Password Encryption

Check "Password_Encrypter.java"

Usage

From the command line:

# Outputs the registered android_id
java -Xbootclasspath/a:lib/httpcore-4.2.2.jar:lib/httpclient-4.2.2.jar:lib/httpmime-4.2.2.jar:lib/httpclient-cache-4.2.2.jar:lib/commons-logging-1.1.1.jar:lib/fluent-hc-4.2.2.jar:lib/protobuf-java-2.4.1.jar:lib/commons-codec-1.6.jar -jar android-checkin-jb.jar <email> <password>

To obtain androidId via adb

adb shell settings get secure android_id

Building

From the command line:

	mvn clean
	mvn package

If you get an error like [ERROR] Failed to execute goal com.github.igor-petruk.protobuf:protobuf-maven-plugin:0.4:run (default) on project android-checkin: Unable to find 'protoc' -> [Help 1], download protobuf-2.4.1 source and build. Make sure the executable protoc is in your PATH.

License

Android Checkin is released under the MIT license.