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yubiserve.py
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yubiserve.py
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#!/usr/bin/python2.7
# coding: utf-8
import BaseHTTPServer
import SocketServer
import hashlib
import hmac
import os
import re
import socket
import time
import urllib
import urlparse
import sys
import logging
from logging.handlers import SysLogHandler
from threading import Thread
from Crypto.Cipher import AES
from OpenSSL import SSL
import crypto
try:
import MySQLdb
except ImportError:
pass
try:
import sqlite3
except ImportError:
pass
def parseConfigFile(): # Originally I wrote this function to parse PHP configuration files!
config = open(os.path.dirname(os.path.realpath(__file__)) + '/yubiserve.cfg', 'r').read().splitlines()
keys = {}
for line in config:
match = re.search('(.*?)=(.*);', line)
try: # Check if it's a string or a number
if ((match.group(2).strip()[0] != '"') and (match.group(2).strip()[0] != '\'')):
keys[match.group(1).strip()] = int(match.group(2).strip())
else:
keys[match.group(1).strip()] = match.group(2).strip('"\' ')
except:
pass
return keys
config = parseConfigFile()
class OATHValidator(crypto.OATHValidator):
def __init__(self, connection):
cur = connection.cursor()
def dbread(publicID):
cur.execute("SELECT counter, secret FROM oathtokens WHERE publicname=? AND active='1'", (publicID))
return cur
def dbwrite(counter, publicID):
cur.execute("UPDATE oathtokens SET counter=? WHERE publicname=? AND active = '1'", (counter, publicID))
connection.commit()
return super(OATHValidator, self).__init__(dbread, dbwrite)
class OTPValidation():
def __init__(self, connection):
self.status = {'OK': 1, 'BAD_OTP': 2, 'REPLAYED_OTP': 3, 'DELAYED_OTP': 4, 'NO_CLIENT': 5}
self.validationResult = 0
self.con = connection
def hexdec(self, hex):
return int(hex, 16)
def modhex2hex(self, string):
hex = "0123456789abcdef"
modhex = "cbdefghijklnrtuv"
retVal = ''
for i in range (0, len(string)):
pos = modhex.find(string[i])
if pos > -1:
retVal += hex[pos]
else:
raise Exception, '"' + string[i] + '": Character is not a valid hex string'
return retVal
def CRC(self):
crc = 0xffff;
for i in range(0, 16):
b = self.hexdec(self.plaintext[i*2] + self.plaintext[(i*2)+1])
for j in range(0, 8):
n = crc & 1
crc = crc >> 1
if n != 0:
crc = crc ^ 0x8408
self.OTPcrc = crc
return [crc]
def isCRCValid(self):
return (self.crc == 0xf0b8)
def aes128ecb_decrypt(self, aeskey, aesdata):
return AES.new(aeskey.decode('hex'), AES.MODE_ECB).decrypt(aesdata.decode('hex')).encode('hex')
def getResult(self):
return self.validationResult
def getResponse(self):
return self.validationResponse
def validateOTP(self, OTP):
self.OTP = re.escape(OTP)
self.validationResult = 0
if (len(OTP) <= 32) or (len(OTP) > 48):
self.validationResult = self.status['BAD_OTP']
return self.validationResult
match = re.search('([cbdefghijklnrtuv]{0,16})([cbdefghijklnrtuv]{32})', re.escape(OTP))
try:
if match.group(1) and match.group(2):
self.userid = match.group(1)
self.token = self.modhex2hex(match.group(2))
cur = self.con.cursor()
#cur.execute('SELECT aeskey, internalname FROM yubikeys WHERE publicname = "' + self.userid + '" AND active = "1"')
cur.execute('SELECT aeskey, internalname FROM yubikeys WHERE publicname=? AND active=1', (self.userid))
if (cur.rowcount != 1):
self.validationResult = self.status['BAD_OTP']
return self.validationResult
(self.aeskey, self.internalname) = cur.fetchone()
self.plaintext = self.aes128ecb_decrypt(self.aeskey, self.token)
uid = self.plaintext[:12]
if (self.internalname != uid):
self.validationResult = self.status['BAD_OTP']
return self.validationResult
if not (self.CRC() or self.isCRCValid()):
self.validationResult = self.status['BAD_OTP']
return self.validationResult
self.internalcounter = self.hexdec(self.plaintext[14:16] + self.plaintext[12:14] + self.plaintext[22:24])
self.timestamp = self.hexdec(self.plaintext[20:22] + self.plaintext[18:20] + self.plaintext[16:18])
#cur.execute('SELECT counter, time FROM yubikeys WHERE publicname = "' + self.userid + '" AND active = "1"')
cur.execute('SELECT counter, time FROM yubikeys WHERE publicname=? AND active="1"', (self.userid))
if (cur.rowcount != 1):
self.validationResult = self.status['BAD_OTP']
return self.validationResult
(self.counter, self.time) = cur.fetchone()
if (self.counter) >= (self.internalcounter):
self.validationResult = self.status['REPLAYED_OTP']
return self.validationResult
if (self.time >= self.timestamp) and ((self.counter >> 8) == (self.internalcounter >> 8)):
self.validationResult = self.status['DELAYED_OTP']
return self.validationResult
except IndexError:
self.validationResult = self.status['BAD_OTP']
return self.validationResult
self.validationResult = self.status['OK']
#cur.execute('UPDATE yubikeys SET counter = ' + str(self.internalcounter) + ', time = ' + str(self.timestamp) + ' WHERE publicname = "' + self.userid + '"')
cur.execute('UPDATE yubikeys SET counter=?, time=? WHERE publicname=?', (str(self.internalcounter), str(self.timestamp), self.userid))
self.con.commit()
return self.validationResult
class YubiServeHandler (BaseHTTPServer.BaseHTTPRequestHandler):
__base = BaseHTTPServer.BaseHTTPRequestHandler
__base_handle = __base.handle
server_version = 'Yubiserve/3.0'
global config
#try:
if config['yubiDB'] == 'sqlite3':
con = sqlite3.connect(os.path.dirname(os.path.realpath(__file__)) + '/yubikeys.sqlite')
elif config['yubiDB'] == 'mysql':
con = MySQLdb.connect(host=config['yubiMySQLHost'], user=config['yubiMySQLUser'], passwd=config['yubiMySQLPass'], db=config['yubiMySQLName'])
#except:
# print "There's a problem with the database!\n"
# quit()
def getToDict(self, qs):
dict = {}
for singleValue in qs.split('&'):
keyVal = singleValue.split('=')
dict[urllib.unquote_plus(keyVal[0])] = urllib.unquote_plus(keyVal[1])
return dict
def setup(self):
self.connection = self.request
self.rfile = socket._fileobject(self.request, "rb", self.rbufsize)
self.wfile = socket._fileobject(self.request, "wb", self.wbufsize)
def log_message(self, format, *args):
pass
def do_GET(self):
(scm, netloc, path, params, query, fragment) = urlparse.urlparse(self.path, 'http')
host = str(self.client_address[0])
port = str(self.client_address[1])
if scm != 'http':
self.server.logger.log(logging.WARNING, 'Host: ' + host + ':' + port + ' Resp: 501: The server does not support the facility required.')
self.send_error(501, "The server does not support the facility required.")
return
if (path != '/wsapi/2.0/verify') and (path != '/wsapi/2.0/oathverify'):
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
self.wfile.write('<html>')
# Yubico Yubikey
self.wfile.write('Yubico Yubikeys:<br><form action="/wsapi/2.0/verify" method="GET"><input type="text" name="otp"><br><input type="submit"></form><br>')
# OATH HOTP
self.wfile.write('OATH/HOTP tokens:<br><form action="/wsapi/2.0/oathverify" method="GET"><input type="text" name="otp"><br><input type="text" name="publicid"><br><input type="submit"></form>')
self.wfile.write('</html>')
elif path == '/wsapi/2.0/verify': # Yubico Yubikey
try:
if len(query) > 0:
getData = self.getToDict(query)
otpvalidation = OTPValidation(self.con)
validation = otpvalidation.validateOTP(getData['otp'])
self.send_response(200)
self.send_header('Content-type', 'text/plain')
self.end_headers()
iso_time = time.strftime("%Y-%m-%dT%H:%M:%S")
try:
result = 't=' + iso_time + '\r\notp=' + getData['otp'] + '\r\nnonce=' + getData['nonce'] + '\r\nsl=100\r\nstatus=' + [k for k, v in otpvalidation.status.iteritems() if v == validation][0] + '\r\n'
orderedResult = 'nonce=' + getData['nonce'] + '&otp=' + getData['otp'] + '&sl=100&status=' + [k for k, v in otpvalidation.status.iteritems() if v == validation][0] + '&t=' + iso_time
except KeyError:
result = 't=' + iso_time + '\r\notp=' + getData['otp'] + '\r\nnonce=\r\nsl=100\r\nstatus=' + [k for k, v in otpvalidation.status.iteritems() if v == validation][0] + '\r\n'
orderedResult = 'nonce=&otp=' + getData['otp'] + 'sl=100&status=' + [k for k, v in otpvalidation.status.iteritems() if v == validation][0] + '&t=' + iso_time
otp_hmac = ''
try:
if (getData['id'] != None):
apiID = re.escape(getData['id'])
cur = self.con.cursor()
#cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id=?", (apiID))
rows = cur.fetchone()[0]
#cur.execute("SELECT secret FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT secret FROM apikeys WHERE id=?", (apiID))
if rows != 0:
api_key = cur.fetchone()[0]
otp_hmac = hmac.new(api_key, msg=orderedResult, digestmod=hashlib.sha1).hexdigest().decode('hex').encode('base64').strip()
else:
result = 't=' + iso_time + '\r\notp=' + getData['otp'] + '\r\nstatus=NO_CLIENT\r\n'
except KeyError:
pass
self.server.logger.log(logging.INFO, 'Host: ' + host + ':' + port + ' Resp: h=' + otp_hmac + ', ' + result.replace('\r', '').replace('\n', ' '))
self.wfile.write('h=' + otp_hmac + '\r\n' + result + '\r\n')
return
except KeyError:
pass
self.send_response(200)
self.send_header('Content-type', 'text/plain')
self.end_headers()
iso_time = time.strftime("%Y-%m-%dT%H:%M:%S")
result = 't=' + iso_time + '\r\notp=\r\nnonce=\r\nstatus=MISSING_PARAMETER\r\n'
orderedResult = 'nonce=&otp=&status=MISSING_PARAMETER&t=' + iso_time
otp_hmac = ''
try:
if (getData['id'] != None):
apiID = re.escape(getData['id'])
cur = self.con.cursor()
#cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id=?", (apiID))
rows = cur.fetchone()[0]
#cur.execute("SELECT secret FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT secret FROM apikeys WHERE id=?", (apiID))
if rows != 0:
api_key = cur.fetchone()[0]
otp_hmac = hmac.new(api_key, msg=orderedResult, digestmod=hashlib.sha1).hexdigest().decode('hex').encode('base64').strip()
except KeyError:
pass
self.server.logger.log(logging.INFO, 'Host: ' + host + ':' + port + ' Resp: h=' + otp_hmac + ', ' + result.replace('\r', '').replace('\n', ' '))
self.wfile.write('h=' + otp_hmac + '\r\n' + result + '\r\n')
return
elif path == '/wsapi/2.0/oathverify': # OATH HOTP
try:
getData = self.getToDict(query)
if (len(query) > 0) and ((len(getData['otp']) == 6) or (len(getData['otp']) == 8) or (len(getData['otp']) == 18) or (len(getData['otp']) == 20)):
oathvalidation = OATHValidator(self.con)
OTP = getData['otp']
if (len(OTP) == 18) or (len(OTP) == 20):
publicID = OTP[0:12]
OTP = OTP[12:]
elif (len(OTP) == 6) or (len(OTP) == 8):
if len(getData['publicid'])>0:
publicID = getData['publicid']
else:
raise KeyError
validation = oathvalidation.validateOATH(OTP, publicID)
self.send_response(200)
self.send_header('Content-type', 'text/plain')
self.end_headers()
iso_time = time.strftime("%Y-%m-%dT%H:%M:%S")
result = 'otp=' + getData['otp'] + '\r\nstatus=' + validation + '\r\nt=' + iso_time
otp_hmac = ''
try:
if (getData['id'] != None):
apiID = re.escape(getData['id'])
cur = self.con.cursor()
#cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id=?", (apiID))
rows = cur.fetchone()[0]
#cur.execute("SELECT secret FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT secret FROM apikeys WHERE id=?", (apiID))
if rows != 0:
api_key = cur.fetchone()[0]
otp_hmac = hmac.new(api_key, msg=result, digestmod=hashlib.sha1).hexdigest().decode('hex').encode('base64').strip()
else:
result = 'otp=' + getData['otp'] + '\r\nstatus=NO_CLIENT\r\nt=' + iso_time
except KeyError:
pass
self.server.logger.log(logging.INFO, 'Host: ' + host + ':' + port + ' Resp: ' + result.replace('\r', '').replace('\n', ' ') + ', h=' + otp_hmac)
self.wfile.write(result + '\r\nh=' + otp_hmac)
return
else:
self.send_response(200)
self.send_header('Content-type', 'text/plain')
self.end_headers()
iso_time = time.strftime("%Y-%m-%dT%H:%M:%S")
result = 'otp=\r\nstatus=BAD_OTP\r\nt=' + iso_time
otp_hmac = ''
try:
if (getData['id'] != None):
apiID = re.escape(getData['id'])
cur = self.con.cursor()
#cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id=?", (apiID))
rows = cur.fetchone()[0]
#cur.execute("SELECT secret FROM apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT secret FROM apikeys WHERE id=?", (apiID))
if rows != 0:
api_key = cur.fetchone()[0]
otp_hmac = hmac.new(api_key, msg=result, digestmod=hashlib.sha1).hexdigest().decode('hex').encode('base64').strip()
except KeyError:
pass
self.server.logger.log(logging.INFO, 'Host: ' + host + ':' + port + ' Resp: h=' + otp_hmac + ', ' + result.replace('\r', '').replace('\n', ' '))
self.wfile.write('h=' + otp_hmac + '\r\n' + result)
return
except KeyError:
pass
self.send_response(200)
self.send_header('Content-type', 'text/plain')
self.end_headers()
iso_time = time.strftime("%Y-%m-%dT%H:%M:%S")
result = 'otp=\r\nstatus=MISSING_PARAMETER\r\nt=' + iso_time
otp_hmac = ''
try:
if (getData['id'] != None):
apiID = re.escape(getData['id'])
cur = self.con.cursor()
#cur.execute("SELECT COUNT(secret) from apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT COUNT(secret) FROM apikeys WHERE id=?", (apiID))
rows = cur.fetchone()[0]
#cur.execute("SELECT secret from apikeys WHERE id = '" + apiID + "'")
cur.execute("SELECT secret FROM apikeys WHERE id=?", (apiID))
if rows != 0:
api_key = cur.fetchone()[0]
otp_hmac = hmac.new(api_key, msg=result, digestmod=hashlib.sha1).hexdigest().decode('hex').encode('base64').strip()
except KeyError:
pass
self.server.logger.log(logging.INFO, 'Host: ' + host + ':' + port + ' Resp: h=' + otp_hmac + ', ' + result.replace('\r', '').replace('\n', ' '))
self.wfile.write('h=' + otp_hmac + '\r\n' + result)
return
do_HEAD = do_GET
do_PUT = do_GET
do_DELETE = do_GET
do_CONNECT = do_GET
do_POST = do_GET
class SecureHTTPServer(BaseHTTPServer.HTTPServer):
def __init__(self, server_address, HandlerClass):
BaseHTTPServer.HTTPServer.__init__(self, server_address, HandlerClass)
ctx = SSL.Context(SSL.SSLv23_METHOD)
fpem = os.path.dirname(os.path.realpath(__file__)) + '/yubiserve.pem'
ctx.use_privatekey_file (fpem)
ctx.use_certificate_file(fpem)
self.socket = SSL.Connection(ctx, socket.socket(self.address_family, self.socket_type))
self.server_bind()
self.server_activate()
class ThreadingHTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer):
def __init__ (self, server_address, RequestHandlerClass, logger=None):
BaseHTTPServer.HTTPServer.__init__ (self, server_address, RequestHandlerClass)
self.logger = logger
class ThreadingHTTPSServer(SocketServer.ThreadingMixIn, SecureHTTPServer):
pass
if __name__ == "__main__":
try:
if MySQLdb != None:
isThereMysql = True
except NameError:
isThereMysql = False
try:
if sqlite3 != None:
isThereSqlite = True
except NameError:
isThereSqlite = False
if isThereMysql == isThereSqlite == False:
print "Cannot continue without any database support.\nPlease read README.\n\n"
quit()
if config['yubiDB'] == 'mysql' and (config['yubiMySQLHost'] == '' or config['yubiMySQLUser'] == '' or config['yubiMySQLPass'] == '' or config['yubiMySQLName'] == ''):
print "Cannot continue without any MySQL configuration.\nPlease read README.\n\n"
quit()
logger = logging.getLogger('yubiserve')
logger.setLevel(logging.INFO)
syslog = SysLogHandler(address='/dev/log', facility=logging.handlers.SysLogHandler.LOG_DAEMON)
syslog.setFormatter(logging.Formatter('%(name)s: [%(levelname)s] %(message)s'))
logger.addHandler(syslog)
yubiserveHTTP = ThreadingHTTPServer((config['yubiserveHOST'], config['yubiservePORT']), YubiServeHandler, logger)
# yubiserveSSL = ThreadingHTTPSServer((config['yubiserveHOST'], config['yubiserveSSLPORT']), YubiServeHandler)
http_thread = Thread(target=yubiserveHTTP.serve_forever)
# ssl_thread = Thread(target=yubiserveSSL.serve_forever)
http_thread.setDaemon(True)
# ssl_thread.setDaemon(True)
http_thread.start()
# ssl_thread.start()
logger.log(logging.INFO, sys.argv[0] + ' HTTP Server is Running')
print 'HTTP Server is running on ' + str(config['yubiserveHOST']) + ':' + str(config['yubiservePORT'])
# print 'HTTPS Server is running on ' + str(config['yubiserveHOST']) + ':' + str(config['yubiserveSSLPORT'])
while 1:
time.sleep(1)