# Author: Hubert Kario, (c) 2016
# Released under Gnu GPL v2.0, see LICENSE file for details

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

from tlsfuzzer.runner import Runner
from tlsfuzzer.messages import Connect, ClientHelloGenerator, \
        ClientKeyExchangeGenerator, ChangeCipherSpecGenerator, \
        FinishedGenerator, ApplicationDataGenerator, AlertGenerator, \
        split_message, FlushMessageList
from tlsfuzzer.expect import ExpectServerHello, ExpectCertificate, \
        ExpectServerHelloDone, ExpectChangeCipherSpec, ExpectFinished, \
        ExpectAlert, ExpectApplicationData, ExpectClose

from tlslite.constants import CipherSuite, AlertLevel, AlertDescription, \
        ExtensionType
from tlslite.extensions import PaddingExtension, TLSExtension
from tlsfuzzer.utils.lists import natural_sort_keys


version = 3


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(" -x probe-name  expect the probe to fail. When such probe passes despite being marked like this")
    print("                it will be reported in the test summary and the whole script will fail.")
    print("                May be specified multiple times.")
    print(" -X message     expect the `message` substring in exception raised during")
    print("                execution of preceding expected failure probe")
    print("                usage: [-x probe-name] [-X exception], order is compulsory!")
    print(" -n num         run 'num' or all(if 0) tests instead of default(50)")
    print("                (excluding \"sanity\" tests)")
    print(" -m min-ext-no  the minimum extension number to use (default=52)")
    print("                (the test uses random extensions past this number)")
    print(" --help         this message")


def main():
    host = "localhost"
    port = 4433
    num_limit = 50
    min_ext = 52
    run_exclude = set()
    expected_failures = {}
    last_exp_tmp = None

    argv = sys.argv[1:]
    opts, args = getopt.getopt(argv, "h:p:e:x:X:n:m:", ["help"])
    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 == '-x':
            expected_failures[arg] = None
            last_exp_tmp = str(arg)
        elif opt == '-X':
            if not last_exp_tmp:
                raise ValueError("-x has to be specified before -X")
            expected_failures[last_exp_tmp] = str(arg)
        elif opt == '-n':
            num_limit = int(arg)
        elif opt == '-m':
            min_ext = int(arg)
        elif opt == '--help':
            help_msg()
            sys.exit(0)
        else:
            raise ValueError("Unknown option: {0}".format(opt))

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

    conversations = {}

    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    node = node.add_child(ClientHelloGenerator(ciphers))
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectServerHelloDone())
    node = node.add_child(ClientKeyExchangeGenerator())
    node = node.add_child(ChangeCipherSpecGenerator())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectFinished())
    node = node.add_child(ApplicationDataGenerator(
        bytearray(b"GET / HTTP/1.0\n\n")))
    node = node.add_child(ExpectApplicationData())
    node = node.add_child(AlertGenerator(AlertLevel.warning,
                                         AlertDescription.close_notify))
    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    node = node.add_child(ExpectClose())
    conversations["sanity"] = conversation

    # send client hello with large padding extension
    for i in chain(range(10), range(0x3f00, 0x4010), range(0x1ff0, 0x2010),
                   range(0x8ff0, 0x9010), range(0xff00, 0xffff-4)):
        conversation = Connect(host, port)
        node = conversation
        ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
        ext = {ExtensionType.client_hello_padding:PaddingExtension().create(i)}
        node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
        node = node.add_child(ExpectServerHello())
        node = node.add_child(ExpectCertificate())
        node = node.add_child(ExpectServerHelloDone())
        node = node.add_child(ClientKeyExchangeGenerator())
        node = node.add_child(ChangeCipherSpecGenerator())
        node = node.add_child(FinishedGenerator())
        node = node.add_child(ExpectChangeCipherSpec())
        node = node.add_child(ExpectFinished())
        node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
        node = node.add_child(ExpectApplicationData())
        node = node.add_child(AlertGenerator(AlertLevel.warning,
                                             AlertDescription.close_notify))
        node = node.add_child(ExpectAlert())
        node.next_sibling = ExpectClose()
        node = node.add_child(ExpectClose())
        conversations["ext padding, {0} bytes".format(i)] = conversation

    # send large extension from unallocated range
    for i in chain(range(10), range(0x3f00, 0x4010), range(0x1ff0, 0x2010),
                   range(0x8ff0, 0x9010), range(0xff00, 0xffff-4)):
        conversation = Connect(host, port)
        node = conversation
        ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
        ext = {80:TLSExtension(extType=80).create(bytearray(i))}
        node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
        node = node.add_child(ExpectServerHello())
        node = node.add_child(ExpectCertificate())
        node = node.add_child(ExpectServerHelloDone())
        node = node.add_child(ClientKeyExchangeGenerator())
        node = node.add_child(ChangeCipherSpecGenerator())
        node = node.add_child(FinishedGenerator())
        node = node.add_child(ExpectChangeCipherSpec())
        node = node.add_child(ExpectFinished())
        node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
        node = node.add_child(ExpectApplicationData())
        node = node.add_child(AlertGenerator(AlertLevel.warning,
                                             AlertDescription.close_notify))
        node = node.add_child(ExpectAlert())
        node.next_sibling = ExpectClose()
        node = node.add_child(ExpectClose())
        conversations["ext #80, {0} bytes".format(i)] = conversation

    # send two extensions, where one is large (4096) and the other is
    # changing size
    for i in chain(range(10), range(0x2f00, 0x3010),
                   range(0x3f00, 0x4010), range(0x1ff0, 0x2010),
                   range(0x8ff0, 0x9010), range(0xef00, 0xefff-8)):
        conversation = Connect(host, port)
        node = conversation
        ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
        ext = {80:TLSExtension(extType=80).create(bytearray(i)),
               ExtensionType.client_hello_padding:
                   PaddingExtension().create(0x1000)}
        node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
        node = node.add_child(ExpectServerHello())
        node = node.add_child(ExpectCertificate())
        node = node.add_child(ExpectServerHelloDone())
        node = node.add_child(ClientKeyExchangeGenerator())
        node = node.add_child(ChangeCipherSpecGenerator())
        node = node.add_child(FinishedGenerator())
        node = node.add_child(ExpectChangeCipherSpec())
        node = node.add_child(ExpectFinished())
        node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
        node = node.add_child(ExpectApplicationData())
        node = node.add_child(AlertGenerator(AlertLevel.warning,
                                             AlertDescription.close_notify))
        node = node.add_child(ExpectAlert())
        node.next_sibling = ExpectClose()
        node = node.add_child(ExpectClose())
        conversations["two ext, #80 {0} bytes".format(i)] = conversation

    # send client hello messages with multiple extensions
    for i in chain(range(10//4), range(0x3f00//4, 0x4010//4),
                   range(0x1ff0//4, 0x2010//4),
                   range(0x8ff0//4, 0x9010//4), range(0xff00//4, 0x10000//4)):
        conversation = Connect(host, port)
        node = conversation
        ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
        high_num_ext = (ExtensionType.supports_npn,
                        ExtensionType.tack,
                        ExtensionType.renegotiation_info)
        # increase the count if some extension points will be skipped because
        # they are meaningful
        for num in high_num_ext:
            if i+min_ext > num:
                i+=1
        ext = dict((j, TLSExtension(extType=j))
                    for j in range(min_ext, min_ext+i)
                    if j not in high_num_ext)
        node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
        node = node.add_child(ExpectServerHello())
        node = node.add_child(ExpectCertificate())
        node = node.add_child(ExpectServerHelloDone())
        node = node.add_child(ClientKeyExchangeGenerator())
        node = node.add_child(ChangeCipherSpecGenerator())
        node = node.add_child(FinishedGenerator())
        node = node.add_child(ExpectChangeCipherSpec())
        node = node.add_child(ExpectFinished())
        node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
        node = node.add_child(ExpectApplicationData())
        node = node.add_child(AlertGenerator(AlertLevel.warning,
                                             AlertDescription.close_notify))
        node = node.add_child(ExpectAlert())
        node.next_sibling = ExpectClose()
        node = node.add_child(ExpectClose())
        conversations["multiple extensions {0}".format(i)] = conversation

    # send client hello with large number of ciphersuites but overall
    # even length
    for i in chain(range(1, 10//2), range(0x3f00//2, 0x4010//2),
                   range(0x1ff0//2, 0x2010//2),
                   range(0x8ff0//2, 0x9010//2), range(0xff00//2, 0xffff//2-2)):
        conversation = Connect(host, port)
        node = conversation
        if i < 0x5600 - 0x0100:
            ciphers = list(range(0x0100, 0x0100 + i))
        else:
            ciphers = list(range(0x0100, 0x5600))
            i -= 0x5600 - 0x0100
            ciphers += list(range(0x5601, 0x5601 + i))
        ciphers += [CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV,
                    CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA]
        node = node.add_child(ClientHelloGenerator(ciphers))
        node = node.add_child(ExpectServerHello())
        node = node.add_child(ExpectCertificate())
        node = node.add_child(ExpectServerHelloDone())
        node = node.add_child(ClientKeyExchangeGenerator())
        node = node.add_child(ChangeCipherSpecGenerator())
        node = node.add_child(FinishedGenerator())
        node = node.add_child(ExpectChangeCipherSpec())
        node = node.add_child(ExpectFinished())
        node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
        node = node.add_child(ExpectApplicationData())
        node = node.add_child(AlertGenerator(AlertLevel.warning,
                                             AlertDescription.close_notify))
        node = node.add_child(ExpectAlert())
        node.next_sibling = ExpectClose()
        node = node.add_child(ExpectClose())
        conversations["ciphers even {0}".format(i)] = conversation

    # send client hello with large number of ciphersuites but overall
    # odd length
    for i in chain(range(1, 10//2), range(0x3f00//2, 0x4010//2),
                   range(0x1ff0//2, 0x2010//2),
                   range(0x8ff0//2, 0x9010//2), range(0xff00//2, 0xffff//2-2)):
        conversation = Connect(host, port)
        node = conversation
        if i < 0x5600 - 0x0100:
            ciphers = list(range(0x0100, 0x0100 + i))
        else:
            ciphers = list(range(0x0100, 0x5600))
            i -= 0x5600 - 0x0100
            ciphers += list(range(0x5601, 0x5601 + i))
        ext = {ExtensionType.client_hello_padding:
                   PaddingExtension().create(1)}
        ciphers += [CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV,
                    CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA]
        node = node.add_child(ClientHelloGenerator(ciphers,
                                                   extensions=ext))
        node = node.add_child(ExpectServerHello())
        node = node.add_child(ExpectCertificate())
        node = node.add_child(ExpectServerHelloDone())
        node = node.add_child(ClientKeyExchangeGenerator())
        node = node.add_child(ChangeCipherSpecGenerator())
        node = node.add_child(FinishedGenerator())
        node = node.add_child(ExpectChangeCipherSpec())
        node = node.add_child(ExpectFinished())
        node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
        node = node.add_child(ExpectApplicationData())
        node = node.add_child(AlertGenerator(AlertLevel.warning,
                                             AlertDescription.close_notify))
        node = node.add_child(ExpectAlert())
        node.next_sibling = ExpectClose()
        node = node.add_child(ExpectClose())
        conversations["ciphers odd {0}".format(i)] = conversation

    # hello split over at least two records, first very small (2B)
    for i in chain(range(10), range(0x3f00, 0x4010), range(0x1ff0, 0x2010),
                   range(0x8ff0, 0x9010), range(0xff00, 0xffff-4)):
        fragment_list = []
        conversation = Connect(host, port)
        node = conversation
        ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
                   CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
        ext = {ExtensionType.client_hello_padding:PaddingExtension().create(i)}
        hello_gen = ClientHelloGenerator(ciphers, extensions=ext)
        node = node.add_child(split_message(hello_gen, fragment_list, 2))
        node = node.add_child(FlushMessageList(fragment_list))
        node = node.add_child(ExpectServerHello())
        node = node.add_child(ExpectCertificate())
        node = node.add_child(ExpectServerHelloDone())
        node = node.add_child(ClientKeyExchangeGenerator())
        node = node.add_child(ChangeCipherSpecGenerator())
        node = node.add_child(FinishedGenerator())
        node = node.add_child(ExpectChangeCipherSpec())
        node = node.add_child(ExpectFinished())
        node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
        node = node.add_child(ExpectApplicationData())
        node = node.add_child(AlertGenerator(AlertLevel.warning,
                                             AlertDescription.close_notify))
        node = node.add_child(ExpectAlert())
        node.next_sibling = ExpectClose()
        node = node.add_child(ExpectClose())
        conversations["fragmented, padding ext {0} bytes".format(i)] = conversation

    # sanity check fragmentation
    fragment_list = []
    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    hello_gen = ClientHelloGenerator(ciphers)
    node = node.add_child(split_message(hello_gen, fragment_list, 2))
    node = node.add_child(FlushMessageList(fragment_list))
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectServerHelloDone())
    node = node.add_child(ClientKeyExchangeGenerator())
    node = node.add_child(ChangeCipherSpecGenerator())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectFinished())
    node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
    node = node.add_child(ExpectApplicationData())
    node = node.add_child(AlertGenerator(AlertLevel.warning,
                                         AlertDescription.close_notify))
    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    node = node.add_child(ExpectClose())
    conversations["sanity check - fragmented"] = conversation

    # test with ciphers and extensions filled to the brim
    conversation = Connect(host, port)
    node = conversation
    i = 0xfffe // 2 - 2  # two ciphers are constant
    if i < 0x5600 - 0x0100:
        ciphers = list(range(0x0100, 0x0100 + i))
    else:
        ciphers = list(range(0x0100, 0x5600))
        i -= 0x5600 - 0x0100
        ciphers += list(range(0x5601, 0x5601 + i))
    ciphers += [CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV,
                CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA]
    # the 4 bytes subtracted from 0xffff are for ext ID and ext len
    ext = {80:TLSExtension(extType=80).create(bytearray(0xffff-4))}
    node = node.add_child(ClientHelloGenerator(ciphers, extensions=ext))
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectServerHelloDone())
    node = node.add_child(ClientKeyExchangeGenerator())
    node = node.add_child(ChangeCipherSpecGenerator())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectFinished())
    node = node.add_child(ApplicationDataGenerator(bytearray(b"GET / HTTP/1.0\n\n")))
    node = node.add_child(ExpectApplicationData())
    node = node.add_child(AlertGenerator(AlertLevel.warning,
                                         AlertDescription.close_notify))
    node = node.add_child(ExpectAlert())
    node.next_sibling = ExpectClose()
    node = node.add_child(ExpectClose())
    conversations["huge hello"] = conversation

    # run the conversation
    good = 0
    bad = 0
    xfail = 0
    xpass = 0
    failed = []
    xpassed = []
    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'])]
    if run_only:
        if num_limit > len(run_only):
            num_limit = len(run_only)
        regular_tests = [(k, v) for k, v in conversations.items() if k in run_only]
    else:
        regular_tests = [(k, v) for k, v in conversations.items() if
                         (k != 'sanity') and k not in run_exclude]
    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:
        print("{0} ...".format(c_name))

        runner = Runner(c_test)

        res = True
        exception = None
        try:
            runner.run()
        except Exception as exp:
            exception = exp
            print("Error while processing")
            print(traceback.format_exc())
            res = False

        if c_name in expected_failures:
            if res:
                xpass += 1
                xpassed.append(c_name)
                print("XPASS-expected failure but test passed\n")
            else:
                if expected_failures[c_name] is not None and  \
                    expected_failures[c_name] not in str(exception):
                        bad += 1
                        failed.append(c_name)
                        print("Expected error message: {0}\n"
                            .format(expected_failures[c_name]))
                else:
                    xfail += 1
                    print("OK-expected failure\n")
        else:
            if res:
                good += 1
                print("OK\n")
            else:
                bad += 1
                failed.append(c_name)

    print("Test end")
    print(20 * '=')
    print("version: {0}".format(version))
    print(20 * '=')
    print("TOTAL: {0}".format(len(sampled_tests) + 2*len(sanity_tests)))
    print("SKIP: {0}".format(len(run_exclude.intersection(conversations.keys()))))
    print("PASS: {0}".format(good))
    print("XFAIL: {0}".format(xfail))
    print("FAIL: {0}".format(bad))
    print("XPASS: {0}".format(xpass))
    print(20 * '=')
    sort = sorted(xpassed ,key=natural_sort_keys)
    if len(sort):
        print("XPASSED:\n\t{0}".format('\n\t'.join(repr(i) for i in sort)))
    sort = sorted(failed, key=natural_sort_keys)
    if len(sort):
        print("FAILED:\n\t{0}".format('\n\t'.join(repr(i) for i in sort)))

    if bad or xpass:
        sys.exit(1)

if __name__ == "__main__":
    main()