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# -*- 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
import datetime
import os
import socket
import struct
import subprocess
import sys
import time
from urllib import error, request
import cldetectlib as detect
from clcommon.utils import mod_makedirs
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')
CACHE_TIME = 259200 # 3 days
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'error_msg': 'Error: License out of date, email template missing.',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
if 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)
return True
except (IOError, struct.error):
return False
# Get IP
def get_ip(self):
if not self._server_ip:
try:
with request.urlopen(SHOW_IP_LINK) as response:
self._server_ip = response.read().decode('utf-8').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:
with open(template, 'r', encoding='utf-8') as f:
self._letter_template = f.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 not admin_email:
return None
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)
)
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)
)
# 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)
with subprocess.Popen(
[RHN_CHECK_FILE],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
) as proc:
proc.communicate()
if proc.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)
with subprocess.Popen(
[RHN_UPDATE_NEW_KEY, '--activationkey=' + key, '--force'],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
) as proc:
out, _ = proc.communicate()
if proc.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
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)
if 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')
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 not os.path.isfile(template['template_file']):
return template['error_msg']
if not check_license():
# set template text into License class attr.
License.open_letter_template(template['template_file'])
# Return Formatted Template
return License.format_letter()
return None
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