login to Google+ using Android Client API - POC

gplus_logon.rb

#!/usr/bin/env ruby

require 'net/http'

username = "USERNAME"
password = "PASSWORD"

def convToHash(text)
	result = Hash.new
	text.each_line do |line|
		line = line.split('=')
		result[line[0]] = line[1].to_s
	end
	result
end

def parameterize(params)
  URI.escape(params.collect{|k,v| "#{k}=#{v}"}.join('&'))
end

def getToken(username, password)
	uri = URI('https://android.clients.google.com/auth')
	req = Net::HTTP::Post.new(uri)

	req['User-Agent'] = "GoogleLoginService/1.3"
	req.set_form_data({
	  "accountType" => "HOSTED_OR_GOOGLE",
	  "Email" => username,
	  "add_account" => 1,
	  "Passwd" => password,
	  "service" => "ac2dm",
	  "source" => "android",
	  "androidId" => "31e0e7f6a1fa7484",
	  "lang" => "pl"
	})

	res = Net::HTTP.start(uri.host, uri.port, :use_ssl => true) do |http|
		http.request(req)
	end
	convToHash(res.body)['Token']
end

def getAccessToken(token, username)
	scope = ['https://www.googleapis.com/auth/plus.me', 'https://www.googleapis.com/auth/plus.stream.read', 'https://www.googleapis.com/auth/plus.stream.write', 'https://www.googleapis.com/auth/plus.circles.write', 'https://www.googleapis.com/auth/plus.circles.read', 'https://www.googleapis.com/auth/plus.photos.readwrite']
	uri = URI('https://android.clients.google.com/auth')
			 
	requestData = parameterize({
	  "device_country" => "pl",
	  "accountType" => "HOSTED_OR_GOOGLE",
	  "Email" => username,
	  "service" => "oauth2:" + scope.join('+'),
	  "source" => "android",
	  "app" => "com.google.android.gms",
	  "client_sig" => "38918a453d07199354f8b19af05ec6562ced5788",
	  "callerPkg" => "com.google.android.gms",
	  "callerSig" => "38918a453d07199354f8b19af05ec6562ced5788",
	  "Token" => token
	})

	req = Net::HTTP::Post.new(uri)
	req['User-Agent'] = "GoogleLoginService/1.3"

	req.body = requestData
	res = Net::HTTP.start(uri.host, uri.port, :use_ssl => true) do |http|
	  http.request(req)
	end
	convToHash(res.body)['Auth']
end

token = getToken(username, password)
auth = getAccessToken(token, username)
print auth