#!/usr/bin/python

#***************************************************************************
# This file is part of the CRYPTO BONE
# File     : sudogetuser 
# Version  : 1.0.5 (ALL-IN-ONE)
# License  : BSD
# Date     : Monday, 1 August 2016
# Contact  : Please send enquiries and bug-reports to innovation@senderek.ie
#
#
# Copyright (c) 2015-2016
#	Ralf Senderek, Ireland.  All rights reserved. (https://senderek.ie)
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	   This product includes software developed by Ralf Senderek.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND  ANY EXPRESS OR 
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE  IMPLIED WARRANTIES 
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
# POSSIBILITY OF SUCH DAMAGE.
#****************************************************************************

from Tkinter import *
from tkMessageBox import *
import os

def unix (command) :
     if os.name == "posix":
          Pipe = os.popen(command, "r")
	  Result = Pipe.read()
	  Pipe.close()
     return Result


def readuser():
     USER = InputField.get()
     # check if this is a valid user
     if USER and (USER in unix("grep \"^"+USER+":\" /etc/passwd")):
          if os.path.isfile("/etc/sudoers.d/cbcontrol"):
               showinfo( "ERROR","This Crypto Bone is set up already.\nYou are not permitted to use this Crypto Bone!" )
	  else:
	       if "cbcontrol" in unix("grep cbcontrol /etc/sudoers"):
                    showinfo( "ERROR","cbcontrol is already listed in the sudoers file.")
	       else:
	            unix("echo "+USER+" ALL = /usr/lib/cryptobone/cbcontrol > /etc/sudoers.d/cbcontrol" ) 
	            unix("systemctl enable cryptoboned") 
	            unix("systemctl enable cryptobone-fetchmail.timer") 
		    # now make sure the MTA is enabled
		    MTA = os.path.realpath("/etc/alternatives/mta")
		    if MTA == "/usr/sbin/postfix" :
	                  unix("systemctl enable postfix") 
		    if MTA == "/usr/sbin/exim" :
	                  unix("systemctl enable exim") 
			  
	  Window.destroy()
     else:
          showinfo( "ERROR","No such user. Try again.")


Window = Tk()
Window.title("Crypto Bone Control")
Window.geometry('400x200')

Frame = Frame(Window)
Text1 = Label(text="Please input the login name of the user that\n will be using the Crypto Bone:")
Text2 = Label(text="This user will be listed in the sudoers file.")
ExecButton = Button(master=Frame, text="setup", command=readuser)
InputField = Entry(master=Frame, width=15) 
Text1.pack(pady=5)
InputField.pack(pady=10) 
Text2.pack(pady=5)
ExecButton.pack() 

Frame.pack()
Window.mainloop()
