DonnchaC/tor-hs-descriptor-calculate.py

## tor-hs-descriptor-calculate.py
import unittest
import hashlib
import struct
import binascii

from base64 import b32decode, b64decode

import Crypto.Util
from Crypto.PublicKey import RSA
from Crypto.Cipher import AES
from Crypto.Util import Counter
from Crypto.Util.number import bytes_to_long


def byte_to_int(byte):
    return int(binascii.hexlify(byte), 16)

# Key Calculations
def get_asn1_sequence(rsa_key):
    seq = Crypto.Util.asn1.DerSequence()
    seq.append(rsa_key.n)
    seq.append(rsa_key.e)
    asn1_seq = seq.encode()
    return asn1_seq


def calc_key_digest(rsa_key):
    """Calculate the SHA1 digest of an RSA key"""
    return hashlib.sha1(get_asn1_sequence(rsa_key)).digest()


def calc_permanent_id(rsa_key):
    return calc_key_digest(rsa_key)[:10]


# Descriptor Calculations
def get_time_period(time, permanent_id):
    """
    time-period = (current-time + permanent-id-byte * 86400 / 256) / 86400
    """
    permanent_id_byte = int(struct.unpack('B', permanent_id[0])[0])
    return (time + permanent_id_byte * 86400 / 256) / 86400


def calc_secret_id_part(time_period, replica, descriptor_cookie=None):
    """
    secret-id-part = H(time-period | descriptor-cookie | replica)
    """
    secret_id_part = hashlib.sha1()
    secret_id_part.update(struct.pack('>I', time_period)[:4])
    if descriptor_cookie:
        secret_id_part.update(descriptor_cookie)
    secret_id_part.update('{0:02X}'.format(replica).decode('hex'))
    return secret_id_part.digest()


def calc_descriptor_id(permanent_id, replica, time, descriptor_cookie=None):
    time_period = get_time_period(time, permanent_id)
    secret_id_part = calc_secret_id_part(time_period, replica,
                                         descriptor_cookie)
    descriptor_id = hashlib.sha1(permanent_id + secret_id_part).digest()
    return descriptor_id


def parse_encrypted_introduction_points(introduction_point_blob,
                                        descriptor_cookie):
    BASIC_AUTH = 1
    STEALTH_AUTH = 2

    authorization_type = byte_to_int(introduction_point_blob[0])
    if authorization_type is BASIC_AUTH:

        client_blocks = byte_to_int(introduction_point_blob[1])

        # Parse the client ID's / encrypted session keys
        client_entries_length = client_blocks * 16 * 20
        client_entries = introduction_point_blob[2:2 + client_entries_length]
        client_keys = [(client_entries[i:i+4], client_entries[i+4:i+20])
                       for i in range(0, client_entries_length, 4 + 16)]

        # Parse the IV and encrypted introduction points after the client keys
        iv = introduction_point_blob[2 + client_entries_length:
                                     2 + client_entries_length + 16]
        encrypted = introduction_point_blob[2 + client_entries_length + 16:]

        # Calculate our client ID
        client_id = hashlib.sha1(descriptor_cookie + iv).digest()[:4]

        for entry_id, encrypted_session_key in client_keys:
            # Find the session key encrypted for this client
            if entry_id == client_id:

                # Try decrypt the session key
                cipher = AES.new(descriptor_cookie, AES.MODE_CTR,
                                 counter=Counter.new(128, initial_value=0))
                session_key = cipher.decrypt(encrypted_session_key)

                # Attempt to decrypt the intro points with the session key
                cipher = AES.new(
                    session_key, AES.MODE_CTR,
                    counter=Counter.new(128, initial_value=bytes_to_long(iv))
                )
                decrypted = cipher.decrypt(encrypted)

                # Check if the decryption looks correct
                if decrypted.startswith("introduction-point "):
                    return decrypted

        # If we get here, something went wrong :(
        raise RuntimeError("The introduction points were not decrypted "
                           "successfully")

    elif authorization_type is STEALTH_AUTH:

        iv = introduction_point_blob[1:1 + 16]
        encrypted = introduction_point_blob[1 + 16:]

        cipher = AES.new(
            descriptor_cookie, AES.MODE_CTR,
            counter=Counter.new(128, initial_value=bytes_to_long(iv))
        )
        decrypted = cipher.decrypt(encrypted)

        if decrypted.startswith("introduction-point "):
            return decrypted
        else:
            raise RuntimeError("The introduction points were not decrypted "
                               "successfully")


class TestDescriptorCalculations(unittest.TestCase):
    def setUp(self):
        self.skipTest('Parent Test Case')

    def test_calc_permanent_id(self):
        permanent_id = calc_permanent_id(self.permanent_key)
        self.assertEqual(b32decode(self.onion_address, 1), permanent_id)

    def test_calc_secret_id_part(self):
        permanent_id = calc_permanent_id(self.permanent_key)
        time_period = get_time_period(self.timestamp, permanent_id)

        # Generate the secret_id_parts for both replicas
        secret_id_parts = []
        for replica in range(0, 2):
            secret_id_parts.append(
                calc_secret_id_part(time_period=time_period, replica=replica,
                                    descriptor_cookie=self.descriptor_cookie)
            )
        self.assertTrue(b32decode(self.secret_id_part, 1) in secret_id_parts)

    def test_calc_descriptor_id(self):
        permanent_id = calc_permanent_id(self.permanent_key)

        # Generate the descriptor_id's for both replicas
        descriptor_ids = []
        for replica in range(0, 2):
            descriptor_ids.append(calc_descriptor_id(
                permanent_id, replica, self.timestamp, self.descriptor_cookie
            ))
        self.assertTrue(b32decode(self.descriptor_id, 1) in descriptor_ids)

    def test_parse_encrypted_introduction_points(self):
        # Had to avoided setting the descriptor cookie for the basic auth
        # example so that descriptor ID calculation would be correct.
        descriptor_cookie = self.descriptor_cookie or self.intro_point_key

        self.assertTrue(parse_encrypted_introduction_points(
            self.introduction_points, descriptor_cookie
        ).startswith('introduction-point '))


class TestBasicAuthDescriptorCalculations(TestDescriptorCalculations,
                                          unittest.TestCase):
    def setUp(self):
        self.permanent_key = RSA.importKey('\n'.join([
            "-----BEGIN RSA PRIVATE KEY-----",
            "MIICXQIBAAKBgQDRwt22Ua5RRZUrttrtfMARueyabyIYJSRPrtHLTME58OosiSaq",
            "sYFOlEdYJ1yZaK0GAwuXh6DPJ2wSbuy71I2J6iDc/hJ/hZaWYU/nqi5NL/NyAeK9",
            "BXegYMqWC8oBF1H4dG8B8GHxeJpL5emDgeiOhuYxwuOiNyx9eaq3R1uNBQIDAQAB",
            "AoGAPT9o/ZNcEt7+b4U056NFceeX7oAEtIgj0iB5oaMHyKNPvTFO2Qh7eTZSnqrf",
            "nuuxmc/J0rUHf3VDWR6KgU3PBa6oUkLZyshgXEysjtW4UYXAy4iHOtZ358yeQSLn",
            "Ciz0DLqFVdwtOReYCKOIYlk+mmOdNQ67IyBDAe4Tcr0giAECQQDxIzVE09Jc7iyj",
            "kAaj/RxWQDGlGZRvl82eZQVU4aMCO2QSHjkRGpgRsSdfIEQTb+uy4U/h0Yz9MYVV",
            "sHYBzazpAkEA3rCWBbZcOFknNlp7G4BKj9Ky94ExmzBT+64oPoEFoKukB1Fr9KRj",
            "nJ8UUXmLLqwsN3MAHTcWkoOAeU9vSLidvQJBAJx7TZkxoIS/5uXpk/WdTmNGWzEZ",
            "rXLRXxTX16LinebX5bPAOyY3TNHGVZdsl+DJM3osrqsLUmQIW89kqN+4uekCQQCv",
            "nWzCFn0FhvFQgOxi1Lp4T34Jh93595PTgBWGrTMl8RYLG1/abyWLJzzbv9FOPkMk",
            "e1GUuJPZeVEA2e7113m1AkAQPWytigj7bp+jIoEgKBbPjT7BZP1X1ZfoaQEkR70c",
            "RBOqte6jM17NeQQAlisIC9TWjKVFbYHkkc2n2priAb3g",
            "-----END RSA PRIVATE KEY-----"
        ]))
        self.introduction_points = b64decode(''.join([
            "AQEAi3xIJz0Qv97ug9kr4U0UNN2kQhkddPHuj4op3cw+fgMLqzPlFBPAJgaEKc+g",
            "8xBTRKUlvfkXxocfV75GyQGi2Vqu5iN1SbI5Uliu3n8IiUina5+WaOfUs9iuHJIK",
            "cErgfT0bUfXKDLvW6/ncsgPdb6kb+jjT8NVhR4ZrRUf9ASfcY/f2WFNTmLgOR3Oa",
            "f2tMLJcAck9VbCDjKfSC6e6HgtxRFe9dX513mDviZp15UAHkjJSKxKvqRRVkL+7W",
            "KxJGfLY56ypZa4+afBYT/yqLzY4C47/g5TTTx9fvsdp0uQ0AmjF4LeXdZ58yNjrp",
            "Da63SrgQQM7lZ3k4LGXzDS20FKW2/9rpWgD78QLJGeKdHngD3ERvTX4m43rtEFrD",
            "oB/4l2nl6fh0507ASYHy7QQQMcdjpN0OWQQKpL9SskZ8aQw1dY4KU28Gooe9ff+B",
            "RGm6BlVzMi+HGcqfMpGwFfYopmqJuOXjNlX7a1jRwrztpJKeu4J9iSTiuSOEiQSq",
            "kUyHRLO4rWJXa2/RMWfH4XSgdUaWFjOF6kaSwmI/pRZIepi/sX8BSKm+vvOnOtlr",
            "Tz2DVSiA2qM+P3Br9qNTDUmTu9mri6fRzzVnj+ybdTQXn60jwPw4vj4xmvVTkjfZ",
            "ZB2gw2+sAmZJA5pnLNGu4N8veo1Jiz7FLE0m+7yjXbcBc/GHWGTJa0Sa1Hwfp82t",
            "ohagQlRYKhLaRrM6ZvjnPMH5dqT/ypfBXcIQAh6td1+e1Hf/uXZPM/ZrgHeCJqF+",
            "PvLDuu4TYxOod+elZE5LfwDFPzCcMA8XNuuDzGQOFOMh9o4xTbQchyRSfhDGev/H",
            "HpY9qxRyua+PjDCmE/F3YiFy77ITJLhCyYEdzVw43hCVY52inEauvHRzqTl7Lc53",
            "PhnSIW6rDWsrrSMWApCC5WRSOSKfh0u4vO13bVLTb/QmuvMEhGiXDVI3/0NEpqKF",
            "ewqyiG9Dvv67A3/IjTe3aMRGfWREHFnEG9bonn03uoufgmQb4h9ci9+QU52sl16F",
            "rxRpxLyMRp8dpUzZbK3qxtASp09Lc2pdgItWcMMTtPObcd7KVV/xkVqm3ezaUbRF",
            "Nw5qDFxkG85ohTvFt3wnfxkpytMhWoBv9F0ZMEFRLY2j+cb8IqXN5dyz6rGqgSYY",
            "dtItQvI7Lq3XnOSFy3uCGC9Vzr6PRPQIrVH/56rSRaEyM8TgVWyaQQ3xm26x9Fe2",
            "jUg50lG/WVzsRueBImuai1KCRC4FB/cg/kVu/s+5f5H4Z/GSD+4UpDyg3i2RYuy9",
            "WOA/AGEeOLY5FkOTARcWteUbi6URboaouX2lnAXK6vX6Ysn8HgE9JATVbVC/96c9",
            "GnWaf9yCr6Q0BvrHkS7hsJJj+VwaNPW4POSqhL+p0p+2eSWZVMlFFxNr+BNKONk+",
            "RAssIHF1xVRHzzl75wjzhzuq0A0crHcHb64P+glkPt4iI7SqejyCrMQh6BWia6RT",
            "c+NwXTnbcibB56McF+xWoyHne6dg1F0urA61JfQboyWOy+Z+cNPjEIcwWhJr/+Gx",
            "v7/yf3V1kNECa90L7BeUmFGKxL7SvgyapevWqkIQCZEcOnobXQRdWUmNqSoZmOxB",
            "u5eDcvrdF9p5wG5IStpzO9OConG3SQb46S9OSU3O7PnjKFId6KRIM7VsprMIIBTz",
            "HKy6ufKyMXgyxxnvE5TZQcLzA4Wv8vHWET3t3WSQEwSPx45IAbjsE587YNOkjK1X",
            "HNT3ypfRdJacxtttR7Y5Y/XF4tJmXkCfb5RoEqIPrQTmiLYh0h02i6CqeFK9u7j/",
            "yAdKY3NrCBuqPM4mWCdjvtgC9i1Q98LCDiVESRrvLlfvv3iWozDUZ3qIU4TnSgti",
            "U5+xKrmlKcWHHgADS56IECgCQyr2nZEhcNK7vKvg+KgA667tRm7M35w9eHz+J7lg",
            "x5v5GYPH4J1UjPEb5Cwl+Vlr0XIqbhMX9MZWimpOJ0l5TisOLuTJ9ennREsFPZjN",
            "U4IZQht7gifFlemn7D4a+UXHu95bHxDBMPJky7iYc2U3r50+JWRF+LO1L2TNDQlV",
            "iPO8AOoI0V0cGaYE+0ZUgpUDk8fxUH5CAPCn+dbsqDh165G6590cF9eF4/yrlf2V",
            "nbhZipPQyOTrmiCkBPQ1zuXYyfFHrJL7yK4ykiBV8c/VLT8nxeKfPwW3USKOScnx",
            "k68qqFZ6lNFxlDwPAJR3F2H+PN5JZ8H1lTE56ujgTBpArXMPYpKri4a0lG+8QnYK",
            "D6jOJIli5QtVQxES4X64NDwducoGHnquMZs3ScvJQPSOuTvuqaad4FrTCZGbv6Ic",
            "emUAHDsxjffMQ9IJYulluCTVWgS/AiBk31yiUB0GsAqZYcWz5kKgTpOXBQhulACM",
            "waokEqbyH2Vtvc1peiPi+Vh6EhTSiDoEVZ2w9GrOnjgpyK6zxzH0aIhJJxlQu8it",
            "w+xj/3+79Bf8myVesgzCWvXbkmvc6jJaoHGopV8lTM2JUn4xYCSz71Bt4wQBKZX4",
            "hFXDlDZaY1k/QRP/zTfQ8pjbcohDgUVW8eftJz3ND5Iy8D3nRF9/BQB3PWox4vyQ",
            "Fj94Eoe8NmEArIKWjUoSkn+EDgNcdHGBIaQ5is0N8r9n4E2cgMj57i4Fm37k8c6+",
            "hlilrggVJ8qTBGs57M0ldqRLwt1bM6SkU//oMGel7Ft3EDd98W/6RXRkmAbsLhRx",
            "7VMb4WCUBrIZLxo1/StwHa13RyTHAt0GKPu549l3oTZezsSad8vlurbnIbxtK9Cl",
            "hp6mYPd3Djoe5OaLe8Gnu23ko+S2+kfHIjOwkza9R5w6AzLjkjYS3C8oRwuxKOft",
            "lj/7xMZWDrfyw5H86L0QiaZnkmD+nig1+S+Rn39mmuEgl2iwZO/ihlncUJQTEULb",
            "7IHpmofr+5ya5xWeo/BFQhulTNr2fJN0bPkVGfp+"
        ]))
        self.onion_address = 'xpe5atmz5d26k26e'
        # Intro point key is the descriptor_cookie,
        self.intro_point_key = b64decode('dCmx3qIvArbil8A0KM4KgQ==')
        self.descriptor_cookie = None  # Hack to not include cookie for desc ID

        self.timestamp = 1424808000  # 2015-02-24 20:00:00

        self.descriptor_id = 'yfmvdrkdbyquyqk5vygyeylgj2qmrvrd'
        self.secret_id_part = 'fluw7z3s5cghuuirq3imh5jjj5ljips6'


class TestStealthAuthDescriptorCalculations(TestDescriptorCalculations,
                                            unittest.TestCase):

    def setUp(self):
        # Use the client key for stealth authentication
        self.permanent_key = RSA.importKey('\n'.join([
            "-----BEGIN RSA PRIVATE KEY-----",
            "MIICXAIBAAKBgQC9X+xnRDmx/sTIX+BrGkwrX1R+2aWp3oAuuY59Pys/cJZKRfkk",
            "HSL07h2tomQd+Bg09j708vfHIUsc/hNyr9oeOaUFm68CzdxY+KmvpJXJSF1nCGux",
            "k+D3LWGcwLxyIfbfRAHuno2LvCPoeMi+kDQANm2DotXeuvqgjQgBQYAKqQIDAQAB",
            "AoGAC7Mudt7XNbEI1VxfEB7qz88u+DtYKduOTdS3AfPyJxQ8pNAX6WxHaZyAhua+",
            "ir92N2dzUkzklA/xhRQJfY9xyUruu8aOrBW6UzZE76s2PQyClgU2jWUi3PVDjoag",
            "7CrKkBM3/IPq34b6IEIffp68iOFIhStjQHBUpnMlHuBzrAUCQQDyl2JtQAoOK17x",
            "ZePx8u/jSxnbT2b6vQQ9334KKrEagFmdfHx8uBktkjWgdM2nrX4/TUqgAke3Iz/v",
            "CIN82mQTAkEAx9eI7KaRyts3EQ4vNJIDxZOglVVIR09xMFhXWfqYRE2PdthqG82E",
            "JKAJMf9MYYd69XTqjdUud2lxMfkKeM4V0wJAUEAkH1//85AFaHX8Yh2rndVKSHKL",
            "7oZ40L8OQu68h7fN7Xsw81Ezgw/LDbmWDtIl4WsANM6MStkuXTTDypm0YQJBAJx9",
            "c4OdjF1F/IEmkmCgVsPJLt7Bwa/VzdUF2KFlUwdplQaDwdOzw97KU2kLekyFQwwj",
            "WelnHtPzheiUFFc1SnECQClXuBVw/mIoac6mbuw83uhLwSip3Aid8NpDgqQKNQAP",
            "pRDzVrFeiNNWcvTfiZyM4HvXAK2xD+XNSi8CtSu3zuQ=",
            "-----END RSA PRIVATE KEY-----"
        ]))
        self.introduction_points = b64decode(''.join([
            "AgEdbps604RR6lqeyoZBzOb6+HvlL2cDt63w8vBtyRaLirq5ZD5GDnr+R0ePj71C",
            "nC7qmRWuwBmzSdSd0lOTaSApBvIifbJksHUeT/rq03dpnnRHdHSVqSvig6bukcWJ",
            "LgJmrRd3ES13LXVHenD3C6AZMHuL9TG+MjLO2PIHu0mFO18aAHVnWY32Dmt144IY",
            "c2eTVZbsKobjjwCYvDf0PBZI+B6H0PZWkDX/ykYjArpLDwydeZyp+Zwj4+k0+nRr",
            "RPlzbHYoBY9pFYDUXDXWdL+vTsgFTG0EngLGlgUWSY5U1T1Db5HfOqc7hbqklgs/",
            "ULG8NUY1k41Wb+dleJI28/+ZOM9zOpHcegNx4Cn8UGbw/Yv3Tj+yki+TMeOtJyhK",
            "PQP8NWq8zThiVhBrfpmVjMYkNeVNyVNoxRwS6rxCQjoLWSJit2Mpf57zY1AOvT1S",
            "EqqFbsX+slD2Uk67imALh4pMtjX29VLIujpum3drLhoTHDszBRhIH61A2eAZqdJy",
            "7JkJd1x/8x7U0l8xNWhnj/bhUHdt3OrCvlN+n8x6BwmMNoLF8JIsskTuGHOaAKSQ",
            "WK3z0rHjgIrEjkQeuQtfmptiIgRB9LnNr+YahRnRR6XIOJGaIoVLVM2Uo2RG4MS1",
            "2KC3DRJ87WdMv2yNWha3w+lWt/mOALahYrvuNMU8wEuNXSi5yCo1OKirv+d5viGe",
            "hAgVZjRymBQF+vd30zMdOG9qXNoQFUN49JfS8z5FjWmdHRt2MHlqD2isxoeabERY",
            "T4Q50fFH8XHkRRomKBEbCwy/4t2DiqcTOSLGOSbTtf7qlUACp2bRth/g0ySAW8X/",
            "CaWVm53z1vdgF2+t6j1CnuIqf0dUygZ07HEAHgu3rMW0YTk04QkvR3jiKAKijvGH",
            "3YcMJz1aJ7psWSsgiwn8a8Cs4fAcLNJcdTrnyxhQI4PMST/QLfp8nPYrhKEeifTc",
            "vYkC4CtGuEFkWyRifIGbeD7FcjkL1zqVNu31vgo3EIVbHzylERgpgTIYBRv7aV7W",
            "X7XAbrrgXL0zgpI0orOyPkr2KRs6CcoEqcc2MLyB6gJ5fYAm69Ige+6gWtRT6qvZ",
            "tJXagfKZivLj73dRD6sUqTCX4tmgo7Q8WFSeNscDAVm/p4dVsw6SOoFcRgaH20yX",
            "MBa3oLNTUNAaGbScUPx2Ja3MQS0UITwk0TFTF7hL++NhTvTp6IdgQW4DG+/bVJ3M",
            "BRR+hsvSz5BSQQj2FUIAsJ+WoVK9ImbgsBbYxSH60jCvxTIdeh2IeUzS2T1bU9AU",
            "jOLzcJZmNh95Nj2Qdrc8/0gin9KpgPmuPQ6CyH3TPFy88lf19v9jHUMO4SKEr7am",
            "DAjbX3D7APKgHyZ61CkuoB3gylIRb8rRJD2ote38M6A1+04yJL/jG+PCL1UnMWdL",
            "yJ4f4LzI9c4ksnGyl9neq0IHnA0Nlky6dmgmE+vLi6OCbEEs2v132wc5PIxRY+TW",
            "8JWu+3wUA4tj5uQvQRqU9/lmoHG/Jxubx/HwdD9Ri17G+qX8re5sySmmq7rcZEGJ",
            "LVrlFuvA0NdoTM4AZY23iR6trJ/Ba2Q4pQk4SfOEMSoZJmf0UbxIP0Ez6Fb+Dxzk",
            "WKXfI+D0ScuVjzV0bs8iXTrCcynztRKndNbtpd39hGAR0rNqvnHyQGYV75bWm5dS",
            "0S0PQ6DOzicLxjNXZFicQvwfieg9VyJikWLFLu4zAbzHnuoRk6b2KbSU4UCG/BCz",
            "mHqz4y6GfsncsNkmFmsD5Gn9UrloWcEWgIDL05yIikL+L9DPLnNlSYtehDfxlhvh",
            "xHzY/Rad4Nzxe62yXhSxhROLTXIolllyOFJgqZ4hBlXybBqJH7sZUll6PUpDwZdu",
            "BK14pzMIpfxq2eYp8jI7fh4lU9YrkuSUM0Ewa7HfrltAgxMhHyaFjfINt61P9OlO",
            "s3nuBY17+KokaSWjACkCimVLH13H5DRhfX8OBRT4LeRMUspX3cyKbccwpOmoBf4y",
            "WPM9QXw7nQy2hwnuX6NiK5QfeCGfY64M06J2tBGcCDmjPSIcJgMcyY7jfH9yPlDt",
            "SKyyXpZnFOJplS2v28A/1csPSGy9kk/uGN0hfFULH4VvyAgNDYzmeOd8FvrbfHH2",
            "8BUTI/Tq2pckxwCYBWHcjSdXRAj5moCNSxCUMtK3kWFdxLFYzoiKuiZwq171qb5L",
            "yCHMwNDIWEMeC75XSMswHaBsK6ON0UUg5oedQkOK+II9L/DVyTs3UYJOsWDfM67E",
            "312O9/bmsoHvr+rofF7HEc74dtUAcaDGJNyNiB+O4UmWbtEpCfuLmq2vaZa9J7Y0",
            "hXlD2pcibC9CWpKR58cRL+dyYHZGJ4VKg6OHlJlF+JBPeLzObNDz/zQuEt9aL9Ae",
            "QByamqGDGcaVMVZ/A80fRoUUgHbh3bLoAmxLCvMbJ0YMtRujdtGm8ZD0WvLXQA/U",
            "dNmQ6tsP6pyVorWVa/Ma5CR7Em5q7M6639T8WPcu7ETTO19MnWud2lPJ5A=="
        ]))
        self.onion_address = 'tosbmbgysyldansp'
        self.descriptor_cookie = b64decode('dCmx3qIvArbil8A0KM4KgR==')
        self.timestamp = 1424808000  # 2015-02-24 20:00:00

        self.descriptor_id = 'ubf3xeibzlfil6s4larq6y5peup2z3oj'
        self.secret_id_part = 'jczvydhzetbpdiylj3d5nsnjvaigs7xm'


if __name__ == '__main__':
    unittest.main()
	import unittest
	import hashlib
	import struct
	import binascii

	from base64 import b32decode, b64decode

	import Crypto.Util
	from Crypto.PublicKey import RSA
	from Crypto.Cipher import AES
	from Crypto.Util import Counter
	from Crypto.Util.number import bytes_to_long


	def byte_to_int(byte):
	return int(binascii.hexlify(byte), 16)

	# Key Calculations
	def get_asn1_sequence(rsa_key):
	seq = Crypto.Util.asn1.DerSequence()
	seq.append(rsa_key.n)
	seq.append(rsa_key.e)
	asn1_seq = seq.encode()
	return asn1_seq


	def calc_key_digest(rsa_key):
	"""Calculate the SHA1 digest of an RSA key"""
	return hashlib.sha1(get_asn1_sequence(rsa_key)).digest()


	def calc_permanent_id(rsa_key):
	return calc_key_digest(rsa_key)[:10]


	# Descriptor Calculations
	def get_time_period(time, permanent_id):
	"""
	time-period = (current-time + permanent-id-byte * 86400 / 256) / 86400
	"""
	permanent_id_byte = int(struct.unpack('B', permanent_id[0])[0])
	return (time + permanent_id_byte * 86400 / 256) / 86400


	def calc_secret_id_part(time_period, replica, descriptor_cookie=None):
	"""
	secret-id-part = H(time-period \| descriptor-cookie \| replica)
	"""
	secret_id_part = hashlib.sha1()
	secret_id_part.update(struct.pack('>I', time_period)[:4])
	if descriptor_cookie:
	secret_id_part.update(descriptor_cookie)
	secret_id_part.update('{0:02X}'.format(replica).decode('hex'))
	return secret_id_part.digest()


	def calc_descriptor_id(permanent_id, replica, time, descriptor_cookie=None):
	time_period = get_time_period(time, permanent_id)
	secret_id_part = calc_secret_id_part(time_period, replica,
	descriptor_cookie)
	descriptor_id = hashlib.sha1(permanent_id + secret_id_part).digest()
	return descriptor_id


	def parse_encrypted_introduction_points(introduction_point_blob,
	descriptor_cookie):
	BASIC_AUTH = 1
	STEALTH_AUTH = 2

	authorization_type = byte_to_int(introduction_point_blob[0])
	if authorization_type is BASIC_AUTH:

	client_blocks = byte_to_int(introduction_point_blob[1])

	# Parse the client ID's / encrypted session keys
	client_entries_length = client_blocks * 16 * 20
	client_entries = introduction_point_blob[2:2 + client_entries_length]
	client_keys = [(client_entries[i:i+4], client_entries[i+4:i+20])
	for i in range(0, client_entries_length, 4 + 16)]

	# Parse the IV and encrypted introduction points after the client keys
	iv = introduction_point_blob[2 + client_entries_length:
	2 + client_entries_length + 16]
	encrypted = introduction_point_blob[2 + client_entries_length + 16:]

	# Calculate our client ID
	client_id = hashlib.sha1(descriptor_cookie + iv).digest()[:4]

	for entry_id, encrypted_session_key in client_keys:
	# Find the session key encrypted for this client
	if entry_id == client_id:

	# Try decrypt the session key
	cipher = AES.new(descriptor_cookie, AES.MODE_CTR,
	counter=Counter.new(128, initial_value=0))
	session_key = cipher.decrypt(encrypted_session_key)

	# Attempt to decrypt the intro points with the session key
	cipher = AES.new(
	session_key, AES.MODE_CTR,
	counter=Counter.new(128, initial_value=bytes_to_long(iv))
	)
	decrypted = cipher.decrypt(encrypted)

	# Check if the decryption looks correct
	if decrypted.startswith("introduction-point "):
	return decrypted

	# If we get here, something went wrong :(
	raise RuntimeError("The introduction points were not decrypted "
	"successfully")

	elif authorization_type is STEALTH_AUTH:

	iv = introduction_point_blob[1:1 + 16]
	encrypted = introduction_point_blob[1 + 16:]

	cipher = AES.new(
	descriptor_cookie, AES.MODE_CTR,
	counter=Counter.new(128, initial_value=bytes_to_long(iv))
	)
	decrypted = cipher.decrypt(encrypted)

	if decrypted.startswith("introduction-point "):
	return decrypted
	else:
	raise RuntimeError("The introduction points were not decrypted "
	"successfully")


	class TestDescriptorCalculations(unittest.TestCase):
	def setUp(self):
	self.skipTest('Parent Test Case')

	def test_calc_permanent_id(self):
	permanent_id = calc_permanent_id(self.permanent_key)
	self.assertEqual(b32decode(self.onion_address, 1), permanent_id)

	def test_calc_secret_id_part(self):
	permanent_id = calc_permanent_id(self.permanent_key)
	time_period = get_time_period(self.timestamp, permanent_id)

	# Generate the secret_id_parts for both replicas
	secret_id_parts = []
	for replica in range(0, 2):
	secret_id_parts.append(
	calc_secret_id_part(time_period=time_period, replica=replica,
	descriptor_cookie=self.descriptor_cookie)
	)
	self.assertTrue(b32decode(self.secret_id_part, 1) in secret_id_parts)

	def test_calc_descriptor_id(self):
	permanent_id = calc_permanent_id(self.permanent_key)

	# Generate the descriptor_id's for both replicas
	descriptor_ids = []
	for replica in range(0, 2):
	descriptor_ids.append(calc_descriptor_id(
	permanent_id, replica, self.timestamp, self.descriptor_cookie
	))
	self.assertTrue(b32decode(self.descriptor_id, 1) in descriptor_ids)

	def test_parse_encrypted_introduction_points(self):
	# Had to avoided setting the descriptor cookie for the basic auth
	# example so that descriptor ID calculation would be correct.
	descriptor_cookie = self.descriptor_cookie or self.intro_point_key

	self.assertTrue(parse_encrypted_introduction_points(
	self.introduction_points, descriptor_cookie
	).startswith('introduction-point '))


	class TestBasicAuthDescriptorCalculations(TestDescriptorCalculations,
	unittest.TestCase):
	def setUp(self):
	self.permanent_key = RSA.importKey('\n'.join([
	"-----BEGIN RSA PRIVATE KEY-----",
	"MIICXQIBAAKBgQDRwt22Ua5RRZUrttrtfMARueyabyIYJSRPrtHLTME58OosiSaq",
	"sYFOlEdYJ1yZaK0GAwuXh6DPJ2wSbuy71I2J6iDc/hJ/hZaWYU/nqi5NL/NyAeK9",
	"BXegYMqWC8oBF1H4dG8B8GHxeJpL5emDgeiOhuYxwuOiNyx9eaq3R1uNBQIDAQAB",
	"AoGAPT9o/ZNcEt7+b4U056NFceeX7oAEtIgj0iB5oaMHyKNPvTFO2Qh7eTZSnqrf",
	"nuuxmc/J0rUHf3VDWR6KgU3PBa6oUkLZyshgXEysjtW4UYXAy4iHOtZ358yeQSLn",
	"Ciz0DLqFVdwtOReYCKOIYlk+mmOdNQ67IyBDAe4Tcr0giAECQQDxIzVE09Jc7iyj",
	"kAaj/RxWQDGlGZRvl82eZQVU4aMCO2QSHjkRGpgRsSdfIEQTb+uy4U/h0Yz9MYVV",
	"sHYBzazpAkEA3rCWBbZcOFknNlp7G4BKj9Ky94ExmzBT+64oPoEFoKukB1Fr9KRj",
	"nJ8UUXmLLqwsN3MAHTcWkoOAeU9vSLidvQJBAJx7TZkxoIS/5uXpk/WdTmNGWzEZ",
	"rXLRXxTX16LinebX5bPAOyY3TNHGVZdsl+DJM3osrqsLUmQIW89kqN+4uekCQQCv",
	"nWzCFn0FhvFQgOxi1Lp4T34Jh93595PTgBWGrTMl8RYLG1/abyWLJzzbv9FOPkMk",
	"e1GUuJPZeVEA2e7113m1AkAQPWytigj7bp+jIoEgKBbPjT7BZP1X1ZfoaQEkR70c",
	"RBOqte6jM17NeQQAlisIC9TWjKVFbYHkkc2n2priAb3g",
	"-----END RSA PRIVATE KEY-----"
	]))
	self.introduction_points = b64decode(''.join([
	"AQEAi3xIJz0Qv97ug9kr4U0UNN2kQhkddPHuj4op3cw+fgMLqzPlFBPAJgaEKc+g",
	"8xBTRKUlvfkXxocfV75GyQGi2Vqu5iN1SbI5Uliu3n8IiUina5+WaOfUs9iuHJIK",
	"cErgfT0bUfXKDLvW6/ncsgPdb6kb+jjT8NVhR4ZrRUf9ASfcY/f2WFNTmLgOR3Oa",
	"f2tMLJcAck9VbCDjKfSC6e6HgtxRFe9dX513mDviZp15UAHkjJSKxKvqRRVkL+7W",
	"KxJGfLY56ypZa4+afBYT/yqLzY4C47/g5TTTx9fvsdp0uQ0AmjF4LeXdZ58yNjrp",
	"Da63SrgQQM7lZ3k4LGXzDS20FKW2/9rpWgD78QLJGeKdHngD3ERvTX4m43rtEFrD",
	"oB/4l2nl6fh0507ASYHy7QQQMcdjpN0OWQQKpL9SskZ8aQw1dY4KU28Gooe9ff+B",
	"RGm6BlVzMi+HGcqfMpGwFfYopmqJuOXjNlX7a1jRwrztpJKeu4J9iSTiuSOEiQSq",
	"kUyHRLO4rWJXa2/RMWfH4XSgdUaWFjOF6kaSwmI/pRZIepi/sX8BSKm+vvOnOtlr",
	"Tz2DVSiA2qM+P3Br9qNTDUmTu9mri6fRzzVnj+ybdTQXn60jwPw4vj4xmvVTkjfZ",
	"ZB2gw2+sAmZJA5pnLNGu4N8veo1Jiz7FLE0m+7yjXbcBc/GHWGTJa0Sa1Hwfp82t",
	"ohagQlRYKhLaRrM6ZvjnPMH5dqT/ypfBXcIQAh6td1+e1Hf/uXZPM/ZrgHeCJqF+",
	"PvLDuu4TYxOod+elZE5LfwDFPzCcMA8XNuuDzGQOFOMh9o4xTbQchyRSfhDGev/H",
	"HpY9qxRyua+PjDCmE/F3YiFy77ITJLhCyYEdzVw43hCVY52inEauvHRzqTl7Lc53",
	"PhnSIW6rDWsrrSMWApCC5WRSOSKfh0u4vO13bVLTb/QmuvMEhGiXDVI3/0NEpqKF",
	"ewqyiG9Dvv67A3/IjTe3aMRGfWREHFnEG9bonn03uoufgmQb4h9ci9+QU52sl16F",
	"rxRpxLyMRp8dpUzZbK3qxtASp09Lc2pdgItWcMMTtPObcd7KVV/xkVqm3ezaUbRF",
	"Nw5qDFxkG85ohTvFt3wnfxkpytMhWoBv9F0ZMEFRLY2j+cb8IqXN5dyz6rGqgSYY",
	"dtItQvI7Lq3XnOSFy3uCGC9Vzr6PRPQIrVH/56rSRaEyM8TgVWyaQQ3xm26x9Fe2",
	"jUg50lG/WVzsRueBImuai1KCRC4FB/cg/kVu/s+5f5H4Z/GSD+4UpDyg3i2RYuy9",
	"WOA/AGEeOLY5FkOTARcWteUbi6URboaouX2lnAXK6vX6Ysn8HgE9JATVbVC/96c9",
	"GnWaf9yCr6Q0BvrHkS7hsJJj+VwaNPW4POSqhL+p0p+2eSWZVMlFFxNr+BNKONk+",
	"RAssIHF1xVRHzzl75wjzhzuq0A0crHcHb64P+glkPt4iI7SqejyCrMQh6BWia6RT",
	"c+NwXTnbcibB56McF+xWoyHne6dg1F0urA61JfQboyWOy+Z+cNPjEIcwWhJr/+Gx",
	"v7/yf3V1kNECa90L7BeUmFGKxL7SvgyapevWqkIQCZEcOnobXQRdWUmNqSoZmOxB",
	"u5eDcvrdF9p5wG5IStpzO9OConG3SQb46S9OSU3O7PnjKFId6KRIM7VsprMIIBTz",
	"HKy6ufKyMXgyxxnvE5TZQcLzA4Wv8vHWET3t3WSQEwSPx45IAbjsE587YNOkjK1X",
	"HNT3ypfRdJacxtttR7Y5Y/XF4tJmXkCfb5RoEqIPrQTmiLYh0h02i6CqeFK9u7j/",
	"yAdKY3NrCBuqPM4mWCdjvtgC9i1Q98LCDiVESRrvLlfvv3iWozDUZ3qIU4TnSgti",
	"U5+xKrmlKcWHHgADS56IECgCQyr2nZEhcNK7vKvg+KgA667tRm7M35w9eHz+J7lg",
	"x5v5GYPH4J1UjPEb5Cwl+Vlr0XIqbhMX9MZWimpOJ0l5TisOLuTJ9ennREsFPZjN",
	"U4IZQht7gifFlemn7D4a+UXHu95bHxDBMPJky7iYc2U3r50+JWRF+LO1L2TNDQlV",
	"iPO8AOoI0V0cGaYE+0ZUgpUDk8fxUH5CAPCn+dbsqDh165G6590cF9eF4/yrlf2V",
	"nbhZipPQyOTrmiCkBPQ1zuXYyfFHrJL7yK4ykiBV8c/VLT8nxeKfPwW3USKOScnx",
	"k68qqFZ6lNFxlDwPAJR3F2H+PN5JZ8H1lTE56ujgTBpArXMPYpKri4a0lG+8QnYK",
	"D6jOJIli5QtVQxES4X64NDwducoGHnquMZs3ScvJQPSOuTvuqaad4FrTCZGbv6Ic",
	"emUAHDsxjffMQ9IJYulluCTVWgS/AiBk31yiUB0GsAqZYcWz5kKgTpOXBQhulACM",
	"waokEqbyH2Vtvc1peiPi+Vh6EhTSiDoEVZ2w9GrOnjgpyK6zxzH0aIhJJxlQu8it",
	"w+xj/3+79Bf8myVesgzCWvXbkmvc6jJaoHGopV8lTM2JUn4xYCSz71Bt4wQBKZX4",
	"hFXDlDZaY1k/QRP/zTfQ8pjbcohDgUVW8eftJz3ND5Iy8D3nRF9/BQB3PWox4vyQ",
	"Fj94Eoe8NmEArIKWjUoSkn+EDgNcdHGBIaQ5is0N8r9n4E2cgMj57i4Fm37k8c6+",
	"hlilrggVJ8qTBGs57M0ldqRLwt1bM6SkU//oMGel7Ft3EDd98W/6RXRkmAbsLhRx",
	"7VMb4WCUBrIZLxo1/StwHa13RyTHAt0GKPu549l3oTZezsSad8vlurbnIbxtK9Cl",
	"hp6mYPd3Djoe5OaLe8Gnu23ko+S2+kfHIjOwkza9R5w6AzLjkjYS3C8oRwuxKOft",
	"lj/7xMZWDrfyw5H86L0QiaZnkmD+nig1+S+Rn39mmuEgl2iwZO/ihlncUJQTEULb",
	"7IHpmofr+5ya5xWeo/BFQhulTNr2fJN0bPkVGfp+"
	]))
	self.onion_address = 'xpe5atmz5d26k26e'
	# Intro point key is the descriptor_cookie,
	self.intro_point_key = b64decode('dCmx3qIvArbil8A0KM4KgQ==')
	self.descriptor_cookie = None # Hack to not include cookie for desc ID

	self.timestamp = 1424808000 # 2015-02-24 20:00:00

	self.descriptor_id = 'yfmvdrkdbyquyqk5vygyeylgj2qmrvrd'
	self.secret_id_part = 'fluw7z3s5cghuuirq3imh5jjj5ljips6'


	class TestStealthAuthDescriptorCalculations(TestDescriptorCalculations,
	unittest.TestCase):

	def setUp(self):
	# Use the client key for stealth authentication
	self.permanent_key = RSA.importKey('\n'.join([
	"-----BEGIN RSA PRIVATE KEY-----",
	"MIICXAIBAAKBgQC9X+xnRDmx/sTIX+BrGkwrX1R+2aWp3oAuuY59Pys/cJZKRfkk",
	"HSL07h2tomQd+Bg09j708vfHIUsc/hNyr9oeOaUFm68CzdxY+KmvpJXJSF1nCGux",
	"k+D3LWGcwLxyIfbfRAHuno2LvCPoeMi+kDQANm2DotXeuvqgjQgBQYAKqQIDAQAB",
	"AoGAC7Mudt7XNbEI1VxfEB7qz88u+DtYKduOTdS3AfPyJxQ8pNAX6WxHaZyAhua+",
	"ir92N2dzUkzklA/xhRQJfY9xyUruu8aOrBW6UzZE76s2PQyClgU2jWUi3PVDjoag",
	"7CrKkBM3/IPq34b6IEIffp68iOFIhStjQHBUpnMlHuBzrAUCQQDyl2JtQAoOK17x",
	"ZePx8u/jSxnbT2b6vQQ9334KKrEagFmdfHx8uBktkjWgdM2nrX4/TUqgAke3Iz/v",
	"CIN82mQTAkEAx9eI7KaRyts3EQ4vNJIDxZOglVVIR09xMFhXWfqYRE2PdthqG82E",
	"JKAJMf9MYYd69XTqjdUud2lxMfkKeM4V0wJAUEAkH1//85AFaHX8Yh2rndVKSHKL",
	"7oZ40L8OQu68h7fN7Xsw81Ezgw/LDbmWDtIl4WsANM6MStkuXTTDypm0YQJBAJx9",
	"c4OdjF1F/IEmkmCgVsPJLt7Bwa/VzdUF2KFlUwdplQaDwdOzw97KU2kLekyFQwwj",
	"WelnHtPzheiUFFc1SnECQClXuBVw/mIoac6mbuw83uhLwSip3Aid8NpDgqQKNQAP",
	"pRDzVrFeiNNWcvTfiZyM4HvXAK2xD+XNSi8CtSu3zuQ=",
	"-----END RSA PRIVATE KEY-----"
	]))
	self.introduction_points = b64decode(''.join([
	"AgEdbps604RR6lqeyoZBzOb6+HvlL2cDt63w8vBtyRaLirq5ZD5GDnr+R0ePj71C",
	"nC7qmRWuwBmzSdSd0lOTaSApBvIifbJksHUeT/rq03dpnnRHdHSVqSvig6bukcWJ",
	"LgJmrRd3ES13LXVHenD3C6AZMHuL9TG+MjLO2PIHu0mFO18aAHVnWY32Dmt144IY",
	"c2eTVZbsKobjjwCYvDf0PBZI+B6H0PZWkDX/ykYjArpLDwydeZyp+Zwj4+k0+nRr",
	"RPlzbHYoBY9pFYDUXDXWdL+vTsgFTG0EngLGlgUWSY5U1T1Db5HfOqc7hbqklgs/",
	"ULG8NUY1k41Wb+dleJI28/+ZOM9zOpHcegNx4Cn8UGbw/Yv3Tj+yki+TMeOtJyhK",
	"PQP8NWq8zThiVhBrfpmVjMYkNeVNyVNoxRwS6rxCQjoLWSJit2Mpf57zY1AOvT1S",
	"EqqFbsX+slD2Uk67imALh4pMtjX29VLIujpum3drLhoTHDszBRhIH61A2eAZqdJy",
	"7JkJd1x/8x7U0l8xNWhnj/bhUHdt3OrCvlN+n8x6BwmMNoLF8JIsskTuGHOaAKSQ",
	"WK3z0rHjgIrEjkQeuQtfmptiIgRB9LnNr+YahRnRR6XIOJGaIoVLVM2Uo2RG4MS1",
	"2KC3DRJ87WdMv2yNWha3w+lWt/mOALahYrvuNMU8wEuNXSi5yCo1OKirv+d5viGe",
	"hAgVZjRymBQF+vd30zMdOG9qXNoQFUN49JfS8z5FjWmdHRt2MHlqD2isxoeabERY",
	"T4Q50fFH8XHkRRomKBEbCwy/4t2DiqcTOSLGOSbTtf7qlUACp2bRth/g0ySAW8X/",
	"CaWVm53z1vdgF2+t6j1CnuIqf0dUygZ07HEAHgu3rMW0YTk04QkvR3jiKAKijvGH",
	"3YcMJz1aJ7psWSsgiwn8a8Cs4fAcLNJcdTrnyxhQI4PMST/QLfp8nPYrhKEeifTc",
	"vYkC4CtGuEFkWyRifIGbeD7FcjkL1zqVNu31vgo3EIVbHzylERgpgTIYBRv7aV7W",
	"X7XAbrrgXL0zgpI0orOyPkr2KRs6CcoEqcc2MLyB6gJ5fYAm69Ige+6gWtRT6qvZ",
	"tJXagfKZivLj73dRD6sUqTCX4tmgo7Q8WFSeNscDAVm/p4dVsw6SOoFcRgaH20yX",
	"MBa3oLNTUNAaGbScUPx2Ja3MQS0UITwk0TFTF7hL++NhTvTp6IdgQW4DG+/bVJ3M",
	"BRR+hsvSz5BSQQj2FUIAsJ+WoVK9ImbgsBbYxSH60jCvxTIdeh2IeUzS2T1bU9AU",
	"jOLzcJZmNh95Nj2Qdrc8/0gin9KpgPmuPQ6CyH3TPFy88lf19v9jHUMO4SKEr7am",
	"DAjbX3D7APKgHyZ61CkuoB3gylIRb8rRJD2ote38M6A1+04yJL/jG+PCL1UnMWdL",
	"yJ4f4LzI9c4ksnGyl9neq0IHnA0Nlky6dmgmE+vLi6OCbEEs2v132wc5PIxRY+TW",
	"8JWu+3wUA4tj5uQvQRqU9/lmoHG/Jxubx/HwdD9Ri17G+qX8re5sySmmq7rcZEGJ",
	"LVrlFuvA0NdoTM4AZY23iR6trJ/Ba2Q4pQk4SfOEMSoZJmf0UbxIP0Ez6Fb+Dxzk",
	"WKXfI+D0ScuVjzV0bs8iXTrCcynztRKndNbtpd39hGAR0rNqvnHyQGYV75bWm5dS",
	"0S0PQ6DOzicLxjNXZFicQvwfieg9VyJikWLFLu4zAbzHnuoRk6b2KbSU4UCG/BCz",
	"mHqz4y6GfsncsNkmFmsD5Gn9UrloWcEWgIDL05yIikL+L9DPLnNlSYtehDfxlhvh",
	"xHzY/Rad4Nzxe62yXhSxhROLTXIolllyOFJgqZ4hBlXybBqJH7sZUll6PUpDwZdu",
	"BK14pzMIpfxq2eYp8jI7fh4lU9YrkuSUM0Ewa7HfrltAgxMhHyaFjfINt61P9OlO",
	"s3nuBY17+KokaSWjACkCimVLH13H5DRhfX8OBRT4LeRMUspX3cyKbccwpOmoBf4y",
	"WPM9QXw7nQy2hwnuX6NiK5QfeCGfY64M06J2tBGcCDmjPSIcJgMcyY7jfH9yPlDt",
	"SKyyXpZnFOJplS2v28A/1csPSGy9kk/uGN0hfFULH4VvyAgNDYzmeOd8FvrbfHH2",
	"8BUTI/Tq2pckxwCYBWHcjSdXRAj5moCNSxCUMtK3kWFdxLFYzoiKuiZwq171qb5L",
	"yCHMwNDIWEMeC75XSMswHaBsK6ON0UUg5oedQkOK+II9L/DVyTs3UYJOsWDfM67E",
	"312O9/bmsoHvr+rofF7HEc74dtUAcaDGJNyNiB+O4UmWbtEpCfuLmq2vaZa9J7Y0",
	"hXlD2pcibC9CWpKR58cRL+dyYHZGJ4VKg6OHlJlF+JBPeLzObNDz/zQuEt9aL9Ae",
	"QByamqGDGcaVMVZ/A80fRoUUgHbh3bLoAmxLCvMbJ0YMtRujdtGm8ZD0WvLXQA/U",
	"dNmQ6tsP6pyVorWVa/Ma5CR7Em5q7M6639T8WPcu7ETTO19MnWud2lPJ5A=="
	]))
	self.onion_address = 'tosbmbgysyldansp'
	self.descriptor_cookie = b64decode('dCmx3qIvArbil8A0KM4KgR==')
	self.timestamp = 1424808000 # 2015-02-24 20:00:00

	self.descriptor_id = 'ubf3xeibzlfil6s4larq6y5peup2z3oj'
	self.secret_id_part = 'jczvydhzetbpdiylj3d5nsnjvaigs7xm'


	if __name__ == '__main__':
	unittest.main()