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Editing: cllicenselib.py

# -*- coding: utf-8 -*-

# CL LICENSE CHECK python lib

#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT

# CLASSES:
#
# LicenseData - main class for CL licence check
#				: check_license
#				: get_ip
#				: date_format
#				: open_letter_template
#				: format_letter
#
# FUNCTIONS:
#
# License update cron              : update_license_timestamp_file
# License update new key           : update license with new key
# Check license                    : check_license
# Return Last License check date   : last_license_check
# Return Template to display       : return_template_to_display

from __future__ import print_function
from __future__ import absolute_import
from future.moves.urllib import request, error
import os, sys, subprocess, struct, time, datetime, socket

import cldetectlib as detect
from clcommon.utils import mod_makedirs
from clcommon.lib.cledition import is_cl_solo_edition

RHN_CHECK_FILE = '/usr/sbin/rhn_check'
RHN_UPDATE_NEW_KEY = '/usr/sbin/rhnreg_ks'
LICENSE_TIMESTAMP_FILE = '/var/lve/lveinfo.ver'
LICENSE_TIMESTAMP_DIR = os.path.dirname(LICENSE_TIMESTAMP_FILE)
RHN_DIRECTORY = '/etc/sysconfig/rhn'
RHN_SYSTEMID = os.path.join(RHN_DIRECTORY, 'systemid')
JWT_TOKEN = os.path.join(RHN_DIRECTORY, 'jwt.token')
JWT_TOKEN_TIMESTAMP_FILE = os.path.join(LICENSE_TIMESTAMP_DIR, 'jwt_last_update_ts')

# 1h if solo else 3 days
CACHE_TIME = 3600 if is_cl_solo_edition(skip_jwt_check=True) else 259200
JWT_UPDATE_INTERVAL = 3600 * 4

NO_VALID_LICENSE_FOUND_TEMPLATE = '/usr/share/cloudlinux/no_valid_license_screen.txt'
LICENSE_OUT_OF_DATE_EMAIL_TEMPLATE = '/usr/share/cloudlinux/license_out_of_date_email.txt'

TEMPLATES = {
	'Email': {
		'template_file': LICENSE_OUT_OF_DATE_EMAIL_TEMPLATE,
		'error_msg': 'Error: License out of date, email template missing.'
	},
	'NoValid': {
		'template_file': NO_VALID_LICENSE_FOUND_TEMPLATE,
		'error_msg': 'Error: No valid license found, template is missing.'
	}
}

SHOW_IP_LINK = 'http://cloudlinux.com/showip.php'

# License Data Class
class LicenseData:
	_license_last_timestamp = ''
	_server_ip = ''
	_letter_template = ''

@staticmethod
	def _is_license_needs_update(license_timestamp_file):
		"""
		Update license when:

in case JWT token present:
		- if no timestamp file with jwt token last update time
		- if jwt token was not updated during last 4 hours
		- if jwt token was updated later than our timestamp in file

in case JWT token is not present, but systemid exists
		(fallback for licensing w/o token)
		- update license only if systemid was changed after last timestamp update

when no jwt and no systemid - re-update license
		"""
		if os.path.exists(JWT_TOKEN):
			if not os.path.exists(JWT_TOKEN_TIMESTAMP_FILE):
				return True
			rhn_updated = int(os.path.getmtime(JWT_TOKEN))
			if rhn_updated < int(time.time()) - JWT_UPDATE_INTERVAL:
				return True
			jwt_last_update_timestamp = read_time_from_file(JWT_TOKEN_TIMESTAMP_FILE)
			if jwt_last_update_timestamp < rhn_updated:
				return True
			return False
		elif os.path.exists(RHN_SYSTEMID):
			rhn_updated = os.path.getmtime(RHN_SYSTEMID)
			return rhn_updated > os.path.getmtime(license_timestamp_file)
		return True

def check_license(self, license_timestamp_file):
		"""
		Checks license:
		1. Reads cache file with timestamp
		2. Ensures license must be re-checked:
			- if timestamp in cache file > CACHE_TIME ->
			check if we need to re-update licensing
		"""
		try:
			# Get timestamp of last license check
			self._license_last_timestamp = read_time_from_file(license_timestamp_file)
			if (int(time.time()) - self._license_last_timestamp) > CACHE_TIME:
				if self._is_license_needs_update(license_timestamp_file):
					return update_license_timestamp_file()
				# because if server does not have jwt token and license is not needed update
				# consider no license
				return os.path.exists(JWT_TOKEN)
			else:
				return True
		except (IOError, struct.error):
			return False

# Get IP
	def get_ip(self):
		if not self._server_ip:
			try:
				self._server_ip = request.urlopen(SHOW_IP_LINK).read().strip()
			except error.URLError as e:
				print('Error: Get server IP. ' + str(e))
				sys.exit(1)

# Format Date
	def date_format(self, format):
		return datetime.datetime.fromtimestamp(self._license_last_timestamp).strftime(format)

# Open letter template
	def open_letter_template(self, template):
		try:
			self._letter_template = open(template, "r").read()
		except IOError as e:
			print('Error: Failed to open template file. ' +str(e))
			sys.exit(1)

# Format Screen
	def format_letter(self):
		admin_email = detect.getCPAdminEmail()
		if admin_email:
			self.get_ip()
			if not self._license_last_timestamp:
				return self._letter_template.replace('%LIC_DATE%','').replace('%IP%',self._server_ip).replace('%HOSTNAME%',socket.gethostname()).replace('%FROM%',admin_email)
			else:
				return self._letter_template.replace('%LIC_DATE%',' since ' + self.date_format('%b %d, %y')).replace('%IP%',self._server_ip).replace('%HOSTNAME%',socket.gethostname()).replace('%FROM%',admin_email)
		else:
			return None

# License Data Class Object
License = LicenseData()

def read_time_from_file(file: str):
	with open(file, 'rb') as f:
		return struct.unpack('i', f.read())[0]

def write_time_to_file(file: str, timestamp: int):
	with open(file, 'wb') as f:
		f.write(struct.pack('i', timestamp))

# License update cron
def update_license_timestamp_file():
	try:
		if not os.path.isdir(LICENSE_TIMESTAMP_DIR):
			mod_makedirs(LICENSE_TIMESTAMP_DIR, 0o755)
		p = subprocess.Popen([RHN_CHECK_FILE], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
		(out, err) = p.communicate()
		if p.returncode == 0:
			write_time_to_file(LICENSE_TIMESTAMP_FILE, int(time.time()))
			if os.path.exists(JWT_TOKEN):
				write_time_to_file(JWT_TOKEN_TIMESTAMP_FILE, int(os.path.getmtime(JWT_TOKEN)))
			return True
		return False
	except (OSError, IOError):
		return False

# update license with new key
def update_license_with_key(key):
	try:
		if not os.path.isdir(LICENSE_TIMESTAMP_DIR):
			mod_makedirs(LICENSE_TIMESTAMP_DIR, 0o755)
		p = subprocess.Popen([RHN_UPDATE_NEW_KEY, '--activationkey='+key, '--force'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
		(out, err) = p.communicate()
		if p.returncode == 0:
			write_time_to_file(LICENSE_TIMESTAMP_FILE, int(time.time()))
			if os.path.exists(JWT_TOKEN):
				write_time_to_file(JWT_TOKEN_TIMESTAMP_FILE, int(os.path.getmtime(JWT_TOKEN)))
			print('OK')
			return True
		else:
			print(out.strip())
			return False
	except (OSError, IOError):
		print('Error: New key activation failed, please try again later.')
		return False

# Returns:
# True == license is Ok
# False == license expired or not found
def check_license():
	# Check for license timestamp file in /var/lve/lveinfo.ver
	if os.path.isfile(LICENSE_TIMESTAMP_FILE):
		return License.check_license(LICENSE_TIMESTAMP_FILE)
	# try to re-update license file if jwt token is present
	# or systemid file as fallback when jwt absent (goDaddy)
	elif os.path.exists(JWT_TOKEN) or os.path.exists(RHN_SYSTEMID):
		return update_license_timestamp_file()
	return False

# Return Last license check Date
def last_license_check(is_valid):
	if is_valid:
		return 'OK'
	# Check for license timestamp file in /var/lve/lveinfo.ver
	if os.path.isfile(LICENSE_TIMESTAMP_FILE):
		return 'No valid license found, last successful check was on ' + License.date_format('%b %d, %y')
	else:
		return 'No valid license found.'

def get_email_template():
	return get_template_to_display(TEMPLATES['Email'])

def get_novalid_template():
	return get_template_to_display(TEMPLATES['NoValid'])

# Return Template Email, No Valid license found template.
def get_template_to_display(template):

# check for template in /usr/share/cloudlinux
	if os.path.isfile(template['template_file']):

if check_license():
			return None
		else:

# set template text into License class attr.
			License.open_letter_template(template['template_file'])

# Return Formatted Template
			return License.format_letter()
	else:
		return template['error_msg']

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Editing: cllicenselib.py

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