# Author: Hubert Kario, (c) 2018
# Released under Gnu GPL v2.0, see LICENSE file for details

from __future__ import print_function
import traceback
import sys
import getopt
from itertools import chain
from random import sample

from tlsfuzzer.runner import Runner
from tlsfuzzer.messages import Connect, ClientHelloGenerator, \
        ClientKeyExchangeGenerator, ChangeCipherSpecGenerator, \
        FinishedGenerator, ApplicationDataGenerator, AlertGenerator, \
        SetRecordVersion, TCPBufferingEnable, TCPBufferingDisable, \
        TCPBufferingFlush, ch_cookie_handler, split_message, \
        PlaintextMessageGenerator
from tlsfuzzer.expect import ExpectServerHello, ExpectCertificate, \
        ExpectServerHelloDone, ExpectChangeCipherSpec, ExpectFinished, \
        ExpectAlert, ExpectApplicationData, ExpectClose, \
        ExpectEncryptedExtensions, ExpectCertificateVerify, \
        ExpectNewSessionTicket, ExpectHelloRetryRequest, \
        ExpectServerKeyExchange

from tlslite.constants import CipherSuite, AlertLevel, AlertDescription, \
        TLS_1_3_DRAFT, GroupName, ExtensionType, SignatureScheme, \
        PskKeyExchangeMode, ContentType
from tlslite.utils.cryptomath import getRandomNumber, getRandomBytes
from tlslite.keyexchange import ECDHKeyExchange
from tlsfuzzer.utils.lists import natural_sort_keys
from tlslite.extensions import KeyShareEntry, ClientKeyShareExtension, \
        SupportedVersionsExtension, SupportedGroupsExtension, \
        SignatureAlgorithmsExtension, PskKeyExchangeModesExtension, \
        PreSharedKeyExtension, PskIdentity, TLSExtension, \
        SignatureAlgorithmsCertExtension
from tlsfuzzer.helpers import key_share_gen, RSA_SIG_ALL
from tlsfuzzer.utils.ordered_dict import OrderedDict


version = 2


def help_msg():
    print("Usage: <script-name> [-h hostname] [-p port] [[probe-name] ...]")
    print(" -h hostname    name of the host to run the test against")
    print("                localhost by default")
    print(" -p port        port number to use for connection, 4433 by default")
    print(" probe-name     if present, will run only the probes with given")
    print("                names and not all of them, e.g \"sanity\"")
    print(" -e probe-name  exclude the probe from the list of the ones run")
    print("                may be specified multiple times")
    print(" -n num         only run `num` random tests instead of a full set")
    print("                (excluding \"sanity\" tests)")
    print(" --num-bytes num Amount of bytes to send in the early data records")
    print("                16384 by default")
    print(" --cookie       expect cookie extension in HRR message")
    print(" -d             negotiate (EC)DHE instead of RSA key exchange")
    print(" --help         this message")


def main():
    host = "localhost"
    port = 4433
    num_limit = None
    run_exclude = set()
    num_bytes = 2**14
    cookie = False
    dhe = False

    argv = sys.argv[1:]
    opts, args = getopt.getopt(argv, "h:p:e:n:d", ["help", "num-bytes=",
                                                  "cookie"])
    for opt, arg in opts:
        if opt == '-h':
            host = arg
        elif opt == '-p':
            port = int(arg)
        elif opt == '-e':
            run_exclude.add(arg)
        elif opt == '-n':
            num_limit = int(arg)
        elif opt == '--help':
            help_msg()
            sys.exit(0)
        elif opt == '--num-bytes':
            num_bytes = int(arg)
        elif opt == '--cookie':
            cookie = True
        elif opt == '-d':
            dhe = True
        else:
            raise ValueError("Unknown option: {0}".format(opt))

    if args:
        run_only = set(args)
    else:
        run_only = None

    conversations = {}

    # sanity check
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = {}
    groups = [GroupName.secp256r1]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\r\n\r\n")))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectApplicationData()
    node = node.next_sibling.add_child(AlertGenerator(AlertLevel.warning,
                                       AlertDescription.close_notify))

    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    conversations["sanity"] = conversation

    # sanity check with PSK binders
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [GroupName.secp256r1]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320), 0)
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\r\n\r\n")))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectApplicationData()
    node = node.next_sibling.add_child(AlertGenerator(AlertLevel.warning,
                                       AlertDescription.close_notify))

    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    conversations["handshake with invalid PSK"] = conversation

    # fake 0-RTT resumption with HRR and early data after second client hello
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [0x1300, GroupName.secp256r1]
    key_shares = [KeyShareEntry().create(0x1300, bytearray(b'\xab'*32))]
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(ApplicationDataGenerator(getRandomBytes(num_bytes)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())

    ext = {}
    if cookie:
        ext[ExtensionType.cookie] = None
    ext[ExtensionType.key_share] = None
    ext[ExtensionType.supported_versions] = None
    node = node.add_child(ExpectHelloRetryRequest(extensions=ext))
    node = node.add_child(ExpectChangeCipherSpec())

    ext = OrderedDict()
    key_shares = []
    for group in [GroupName.secp256r1]:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    if cookie:
        ext[ExtensionType.cookie] = ch_cookie_handler
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [getRandomBytes(32)])

    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))

    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(PlaintextMessageGenerator(
        ContentType.application_data,
        getRandomBytes(64)))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectAlert(AlertLevel.fatal,
                                    AlertDescription.bad_record_mac)
    node.next_sibling.add_child(ExpectClose())
    conversations["handshake with 0-RTT, HRR and early data after 2nd Client Hello"]\
        = conversation

    # fake 0-RTT resumption with HRR
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [0x1300, GroupName.secp256r1]
    key_shares = [KeyShareEntry().create(0x1300, bytearray(b'\xab'*32))]
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(ApplicationDataGenerator(getRandomBytes(num_bytes)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())

    ext = {}
    if cookie:
        ext[ExtensionType.cookie] = None
    ext[ExtensionType.key_share] = None
    ext[ExtensionType.supported_versions] = None
    node = node.add_child(ExpectHelloRetryRequest(extensions=ext))
    node = node.add_child(ExpectChangeCipherSpec())

    ext = OrderedDict()
    key_shares = []
    for group in [GroupName.secp256r1]:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    if cookie:
        ext[ExtensionType.cookie] = ch_cookie_handler
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [getRandomBytes(32)])

    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))

    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\r\n\r\n")))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectApplicationData()
    node = node.next_sibling.add_child(AlertGenerator(AlertLevel.warning,
                                       AlertDescription.close_notify))

    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    conversations["handshake with invalid 0-RTT and HRR"] = conversation

    # fake 0-RTT resumption with fragmented early data
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [GroupName.secp256r1]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(ApplicationDataGenerator(
        getRandomBytes(num_bytes // 2)))
    node = node.add_child(ApplicationDataGenerator(
        getRandomBytes(num_bytes // 2)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\r\n\r\n")))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectApplicationData()
    node = node.next_sibling.add_child(AlertGenerator(AlertLevel.warning,
                                       AlertDescription.close_notify))

    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    conversations["handshake with invalid 0-RTT with fragmented early data"]\
        = conversation

    # fake 0-RTT and early data spliced into the Finished message
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [GroupName.secp256r1]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(ApplicationDataGenerator(getRandomBytes(num_bytes)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    finished_fragments = []
    node = node.add_child(split_message(FinishedGenerator(),
                                        finished_fragments,
                                        16))
    # early data spliced into the Finished message
    node = node.add_child(PlaintextMessageGenerator(
        ContentType.application_data,
        getRandomBytes(64)))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectAlert(AlertLevel.fatal,
                                    AlertDescription.bad_record_mac)

    node.next_sibling.add_child(ExpectClose())
    conversations["undecryptable record later in handshake together with early_data"]\
        = conversation

    # fake 0-RTT resumption and CCS between fake early data
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [GroupName.secp256r1]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(
        ApplicationDataGenerator(getRandomBytes(num_bytes//2)))
    node = node.add_child(ChangeCipherSpecGenerator(fake=True))
    node = node.add_child(
        ApplicationDataGenerator(getRandomBytes(num_bytes//2)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\r\n\r\n")))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectApplicationData()
    node = node.next_sibling.add_child(AlertGenerator(AlertLevel.warning,
                                       AlertDescription.close_notify))

    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    conversations["handshake with invalid 0-RTT and CCS between early data records"]\
        = conversation

    # fake 0-RTT resumption and CCS
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [GroupName.secp256r1]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(ChangeCipherSpecGenerator(fake=True))
    node = node.add_child(ApplicationDataGenerator(getRandomBytes(num_bytes)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\r\n\r\n")))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectApplicationData()
    node = node.next_sibling.add_child(AlertGenerator(AlertLevel.warning,
                                       AlertDescription.close_notify))

    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    conversations["handshake with invalid 0-RTT and CCS"] = conversation

    # fake 0-RTT resumption with unknown version
    conversation = Connect(host, port)
    node = conversation
    ext = OrderedDict()
    groups = [GroupName.secp256r1,
              GroupName.ffdhe2048]
    if dhe:
        ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
                   CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    else:
        ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
                   CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([(3, 5), (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(ApplicationDataGenerator(getRandomBytes(num_bytes)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())
    node = node.add_child(ExpectServerHello(version=(3, 3)))
    node = node.add_child(ExpectCertificate())
    if dhe:
        node = node.add_child(ExpectServerKeyExchange())
    node = node.add_child(ExpectServerHelloDone())
    # section D.3 of draft 28 states that client that receives TLS 1.2
    # ServerHello as a reply to 0-RTT Client Hello MUST fail a connection
    # consequently, the server does not need to be able to ignore early data
    # in TLS 1.2 mode
    node = node.add_child(ExpectAlert(AlertLevel.fatal,
                                      AlertDescription.unexpected_message))
    node.add_child(ExpectClose())
    conversations["handshake with invalid 0-RTT and unknown version (downgrade to TLS 1.2)"] = conversation

    # fake 0-RTT resumption
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_AES_128_GCM_SHA256,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    ext = OrderedDict()
    groups = [GroupName.secp256r1]
    key_shares = []
    for group in groups:
        key_shares.append(key_share_gen(group))
    ext[ExtensionType.key_share] = ClientKeyShareExtension().create(key_shares)
    ext[ExtensionType.supported_versions] = SupportedVersionsExtension()\
        .create([TLS_1_3_DRAFT, (3, 3)])
    ext[ExtensionType.supported_groups] = SupportedGroupsExtension()\
        .create(groups)
    sig_algs = [SignatureScheme.rsa_pss_rsae_sha256,
                SignatureScheme.rsa_pss_pss_sha256]
    ext[ExtensionType.signature_algorithms] = SignatureAlgorithmsExtension()\
        .create(sig_algs)
    ext[ExtensionType.signature_algorithms_cert] = SignatureAlgorithmsCertExtension()\
        .create(RSA_SIG_ALL)
    ext[ExtensionType.early_data] = \
        TLSExtension(extType=ExtensionType.early_data)
    ext[ExtensionType.psk_key_exchange_modes] = PskKeyExchangeModesExtension()\
        .create([PskKeyExchangeMode.psk_dhe_ke, PskKeyExchangeMode.psk_ke])
    iden = PskIdentity().create(getRandomBytes(320),
                                getRandomNumber(2**30, 2**32))
    bind = getRandomBytes(32)
    ext[ExtensionType.pre_shared_key] = PreSharedKeyExtension().create(
        [iden], [bind])
    node = node.add_child(TCPBufferingEnable())
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(SetRecordVersion((3, 3)))
    node = node.add_child(ApplicationDataGenerator(getRandomBytes(num_bytes)))
    node = node.add_child(TCPBufferingDisable())
    node = node.add_child(TCPBufferingFlush())
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectEncryptedExtensions())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectCertificateVerify())
    node = node.add_child(ExpectFinished())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\r\n\r\n")))

    # This message is optional and may show up 0 to many times
    cycle = ExpectNewSessionTicket()
    node = node.add_child(cycle)
    node.add_child(cycle)

    node.next_sibling = ExpectApplicationData()
    node = node.next_sibling.add_child(AlertGenerator(AlertLevel.warning,
                                       AlertDescription.close_notify))

    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    conversations["handshake with invalid 0-RTT"] = conversation


    # run the conversation
    good = 0
    bad = 0
    failed = []
    if not num_limit:
        num_limit = len(conversations)

    # make sure that sanity test is run first and last
    # to verify that server was running and kept running throughout
    sanity_tests = [('sanity', conversations['sanity'])]
    regular_tests = [(k, v) for k, v in conversations.items() if k != 'sanity']
    sampled_tests = sample(regular_tests, min(num_limit, len(regular_tests)))
    ordered_tests = chain(sanity_tests, sampled_tests, sanity_tests)

    for c_name, c_test in ordered_tests:
        if run_only and c_name not in run_only or c_name in run_exclude:
            continue
        print("{0} ...".format(c_name))

        runner = Runner(c_test)

        res = True
        try:
            runner.run()
        except Exception:
            print("Error while processing")
            print(traceback.format_exc())
            res = False

        if res:
            good += 1
            print("OK\n")
        else:
            bad += 1
            failed.append(c_name)

    print("Basic check if TLS 1.3 server can handle 0-RTT handshake")
    print("Verify that the server can handle a 0-RTT handshake from client")
    print("even if (or rather, especially if) it doesn't support 0-RTT.\n")
    print("version: {0}\n".format(version))

    print("Test end")
    print("successful: {0}".format(good))
    print("failed: {0}".format(bad))
    failed_sorted = sorted(failed, key=natural_sort_keys)
    print("  {0}".format('\n  '.join(repr(i) for i in failed_sorted)))

    if bad > 0:
        sys.exit(1)

if __name__ == "__main__":
    main()
