#!/usr/bin/env python3
import subprocess
import hashlib
import sys

destfile = "authkeyfile/authorized_keys"

p = subprocess.Popen(["./ldap_query.py"], stdout=subprocess.PIPE, stdin=subprocess.PIPE)
(po, pr) = p.communicate()
if(p.returncode != 0):
    print("Data from ldap_query.py seems to be invalid. QUIT")
    sys.exit(1)

newhash = hashlib.md5(po).hexdigest()
#print(newhash)

try:
    f = open(destfile, "rb")
    oldhash = hashlib.md5(f.read()).hexdigest()
    f.close()
#    print(oldhash)
except:
    oldhash = None
    print("cannot open auth key file for read")

if newhash != oldhash:
#    print("Updating file")
    f = open(destfile, "wb")
    f.write(po)
    f.close()