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mirror of https://github.com/mozilla/cipherscan.git synced 2024-09-28 23:53:41 +02:00

add more probes

since not all servers support the ciphers supported by Firefox 42,
add other configurations to make sure we can find a way to connect
to server, if anything could

also includes much more elaborate and realistic TLSv1.3 Client Hello
(the Xmas tree)
This commit is contained in:
Hubert Kario 2016-08-04 22:34:32 +02:00
parent 22ed23f071
commit 88ae052f8e
6 changed files with 800 additions and 10 deletions

141
cscan.py
View File

@ -5,15 +5,21 @@
from __future__ import print_function
from tlslite.messages import ClientHello, ServerHello, ServerHelloDone, Alert
from tlslite.constants import CipherSuite, \
AlertLevel
ExtensionType, AlertLevel
from tlslite.extensions import TLSExtension
import sys
import json
import getopt
import itertools
import copy
from cscan.scanner import Scanner
from cscan.config import Firefox_42
from cscan.modifiers import set_hello_version
from cscan.config import Xmas_tree, IE_6, IE_8_Win_XP, \
IE_11_Win_7, IE_11_Win_8_1, Firefox_46, Firefox_42, HugeCipherList, \
VeryCompatible
from cscan.modifiers import no_sni, set_hello_version, set_record_version, \
no_extensions, truncate_ciphers_to_size, append_ciphers_to_size, \
extend_with_ext_to_size, add_empty_ext
def scan_with_config(host, port, conf, hostname, __sentry=None, __cache={}):
@ -32,6 +38,26 @@ def scan_with_config(host, port, conf, hostname, __sentry=None, __cache={}):
return ret
class IE_6_ext_tls_1_0(IE_6):
def __init__(self):
super(IE_6_ext_tls_1_0, self).__init__()
self.modifications += ["TLSv1.0", "ext"]
self.version = (3, 1)
self.record_version = (3, 0)
def __call__(self, hostname):
ret = super(IE_6_ext_tls_1_0, self).__call__(hostname)
ret.ssl2 = False
# filter out SSLv2 ciphersuites
ret.cipher_suites = [i for i in ret.cipher_suites if i <= 0xffff and
i != CipherSuite.
TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
ret.extensions = [TLSExtension(extType=ExtensionType.
renegotiation_info)
.create(bytearray(1))]
return ret
def simple_inspector(result):
"""
Perform simple check to see if connection was successful.
@ -89,20 +115,122 @@ configs = {}
def load_configs():
"""Load known client configurations for later use in scanning."""
base_configs = [Firefox_42]
base_configs = [Xmas_tree, Firefox_42, IE_8_Win_XP, IE_11_Win_7,
VeryCompatible]
for conf in base_configs:
# only no extensions
gen = no_extensions(conf())
configs[gen.name] = gen
gen = no_sni(conf())
configs[gen.name] = gen
for version in ((3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 254)):
if conf().version != version:
# just changed version
gen = set_hello_version(conf(), version)
if gen.record_version > version:
gen.record_version = version
gen = set_record_version(gen, version)
configs[gen.name] = gen
# changed version and no extensions
gen = set_hello_version(conf(), version)
if gen.record_version > version:
gen = set_record_version(gen, version)
gen = no_extensions(gen)
configs[gen.name] = gen
# changed version and no sni
gen = set_hello_version(conf(), version)
if gen.record_version > version:
gen = set_record_version(gen, version)
gen = no_sni(gen)
configs[gen.name] = gen
# Xmas tree configs
gen = Xmas_tree()
configs[gen.name] = gen
gen = no_sni(Xmas_tree())
configs[gen.name] = gen
# Firefox 42 configs
gen = Firefox_42()
configs[gen.name] = gen
# Firefox 46 configs
gen = Firefox_46()
configs[gen.name] = gen
gen = set_hello_version(Firefox_46(), (3, 254))
configs[gen.name] = gen
gen = set_hello_version(Firefox_46(), (3, 5))
configs[gen.name] = gen
gen = no_extensions(set_hello_version(Firefox_46(), (3, 5)))
configs[gen.name] = gen
gen = set_hello_version(Firefox_46(), (3, 1))
configs[gen.name] = gen
# IE 6 configs
gen = IE_6()
configs[gen.name] = gen
gen = IE_6_ext_tls_1_0()
configs[gen.name] = gen
# IE 8 configs
gen = IE_8_Win_XP()
configs[gen.name] = gen
gen = extend_with_ext_to_size(IE_8_Win_XP(), 200)
configs[gen.name] = gen
for ext_id in (0, 1, 2, 3, 4, 5):
gen = add_empty_ext(IE_8_Win_XP(), ext_id)
configs[gen.name] = gen
# IE 11 on Win 7 configs
gen = IE_11_Win_7()
configs[gen.name] = gen
gen = no_sni(IE_11_Win_7())
configs[gen.name] = gen
gen = set_hello_version(no_sni(IE_11_Win_7()), (3, 2))
configs[gen.name] = gen
# IE 11 on Win 8.1 configs
gen = IE_11_Win_8_1()
configs[gen.name] = gen
gen = set_hello_version(IE_11_Win_8_1(), (3, 1))
configs[gen.name] = gen
gen = set_hello_version(IE_11_Win_8_1(), (3, 4))
configs[gen.name] = gen
# Huge Cipher List
gen = HugeCipherList()
configs[gen.name] = gen
gen = truncate_ciphers_to_size(HugeCipherList(), 16388)
configs[gen.name] = gen
# Very Compatible
gen = VeryCompatible()
configs[gen.name] = gen
gen = append_ciphers_to_size(VeryCompatible(), 2**16)
configs[gen.name] = gen
gen = extend_with_ext_to_size(VeryCompatible(), 2**16)
configs[gen.name] = gen
gen = extend_with_ext_to_size(VeryCompatible(), 16388)
configs[gen.name] = gen
def scan_TLS_intolerancies(host, port, hostname):
"""Look for intolerancies (version, extensions, ...) in a TLS server."""
@ -159,6 +287,9 @@ def scan_TLS_intolerancies(host, port, hostname):
conf.version == (3, 2)))
intolerancies["TLS 1.0"] = all(conf_iterator(lambda conf:
conf.version == (3, 1)))
intolerancies["extensions"] = all(conf_iterator(lambda conf:
conf.extensions and not
conf.ssl2))
if json_out:
print(json.dumps(intolerancies))

View File

@ -7,12 +7,15 @@ import random
from tlslite.messages import ClientHello
from tlslite.constants import \
ECPointFormat, HashAlgorithm, SignatureAlgorithm
from tlslite.mathtls import goodGroupParameters
from tlslite.extensions import SNIExtension, SupportedGroupsExtension, \
TLSExtension, SignatureAlgorithmsExtension, NPNExtension, \
ECPointFormatsExtension
ECPointFormatsExtension, PaddingExtension
from tlslite.utils.cryptomath import numberToByteArray
from tlslite.utils.ecc import getCurveByName, encodeX962Point
from tlslite.utils.cryptomath import powMod
from .constants import CipherSuite, ExtensionType, GroupName
from .extensions import KeyShareExtension
class HelloConfig(object):
"""Base object for all Client Hello configurations."""
@ -132,3 +135,446 @@ class Firefox_42(HelloConfig):
SignatureAlgorithm.dsa))
ext.append(SignatureAlgorithmsExtension()
.create(sig_algs))
class Firefox_46(HelloConfig):
"""Create ClientHello like Firefox 46"""
# verified by packet capture
def __init__(self):
super(Firefox_46, self).__init__()
self._name = "Firefox 46"
self.version = (3, 3)
self.record_version = (3, 1)
self.ciphers = [CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA]
ext = self.extensions = []
ext.append(SNIExtension())
ext.append(TLSExtension(extType=ExtensionType.extended_master_secret))
ext.append(TLSExtension(extType=ExtensionType.renegotiation_info)
.create(bytearray(1)))
ext.append(SupportedGroupsExtension().create([GroupName.secp256r1,
GroupName.secp384r1,
GroupName.secp521r1]))
ext.append(ECPointFormatsExtension().create([ECPointFormat.uncompressed]))
ext.append(TLSExtension(extType=ExtensionType.session_ticket))
ext.append(NPNExtension())
ext.append(TLSExtension(extType=ExtensionType.alpn)
.create(bytearray(b'\x00\x15' +
b'\x02' + b'h2' +
b'\x08' + b'spdy/3.1' +
b'\x08' + b'http/1.1')))
ext.append(TLSExtension(extType=ExtensionType.status_request)
.create(bytearray(b'\x01' +
b'\x00\x00' +
b'\x00\x00')))
sig_algs = []
for alg in ['sha256', 'sha384', 'sha512', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.rsa))
for alg in ['sha256', 'sha384', 'sha512', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.ecdsa))
for alg in ['sha256', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.dsa))
ext.append(SignatureAlgorithmsExtension()
.create(sig_algs))
_ec_precomputed = {
'secp256r1' : [
bytearray(b'\x04\x85\x96\xe5\xa1\x92\x99\xf8\xb1\xb1}\xcd\xdc\x1c^\xfd05\xa1\xe1\xd3\xd0\x87s\xb1\xd8>\x00TX\xac\x86\xe1\xa3\xb0c~\x85\x8d&\xaf"X\xb5\x9cf\x8d\xf4\xf5d\xd7u\'&]\xbe\xe3\x83]ul\xff\x86e\x89'),
bytearray(b'\x04\xa89\xfc\xb2r\xf3\x03p6\xca\xb6\xe2\xb1t2\t\x8b\xb2\x89\xce\x8f\x84\r\x8b\x1b\r\\\r/\xcd\xabn\xb6WE\xb7\x9a\xba\r\xdb\x03\xc3\x9c\xd9N\x19\x03[\xe0\nK\xf3\xfb\x00\xbe]d\x96e\xf2\xde\x94\td'),
bytearray(b'\x04\xaa\xf1Q\xfb\xf1\x95\x03\xaa\x8d\x8c\xefB\x8c;\x04u\xdaG\xee\xe5\xd9`J\xe3\x90\xc3T\x02\xe7\x80\x9b\x0f,bi4m2\n\xffD\x9b\xb68\x10\xa3\xbdd]\x05\xa3\x81\xfe\x97J\x9aY\x0e\xe3\x1b\xad\xe4\x84\xbd'),
bytearray(b'\x04\x17\xf9K\x1b\x95\xd3\xf7\xfc`y\xe7g*A\xeb4!\xbca\xd1)\xa0\x0e\xa88\xbd\xb0\xd6\x9a\x97\x95\xa1R2\xcc]$[\xc1\x90T\x83Lu\xbb%I\x81\x8a\x11\x0c\x01\x07)"\x80\xbb\xbaS\xa5`r\x91\xe6'),
bytearray(b"\x04xGX\x06\xb2N\xe2\x9f\xfc\xdc}\xd2\xdbU\x9a$\xb6\xbc`\xb6\xec\xaa\xad(\xa4\x7fwU\xcfK/T\xea\xa5\xc2Y\xf7<\xfe\xa9\xaf\xa2f7\xa2\'/\xfd\x18\xae\x1e\xc0,\xa5cd\x8d2\x98\xeeA#\x13\x9c"),
bytearray(b'\x04\x14\xf0\xf5_\xa1\xf6\xa5\x1c\xf4%\x17\xc4\x86uE|\xc3#\x11\x9b\xf8\xf2\xcc\xc8F/\xcb\xc46,\x81+@\xbeS\x93\xa59\xae\xc8\xe9 {\r\xdfE j!\xa7\xef\x85\x04\xa0\x9bI\xbbiC\x9c#II\xb2')],
'secp384r1' : [
bytearray(b'\x04*\x9c\x14\xfe!_\xea\xa7\xef\x8aR\xd7\x9d\xab\xc3fU6)\x8b\xce\x935q\x92l\xbc\xb84\x96$\xf0\x86\x05\x85\xaaEq\xca0\x99\xf6c\xf2+=\xc9!Ms%z\xf7\x98\x1auCOb\xcc\xdc\x89\x1d\x97\xa7y\xe0\x8e\xea/\x80brj\xd7\x1b\x17\x89<\xe5\xba\xa3*\x0c\xb5\r\xde}\xa7{\x94\x9f\x81\xb3:\x92'),
bytearray(b"\x04\x9b]\xfap\xf5R\xefCv\x95\xc4c\xea\xee\xe1i\xf80\x97\x08\xdb\xe7\x83a\x8f~`\xd7`>A\x8aS6\x82\'\xd6711\x9b,+\xc9\xbb\xa7\xa3E\xe3\xfb\x1a\xa2\x83\xac\xf8\x0eV\x93y\xb2w\xe5\xf5hQ3H\xa0\xa9\x8d\xfdg\xe9\xac\x12\xcd%(bY\xc5+\x98o\xb5D1\xcbu\x7f\t\x8f\xfe\xfa\x16q"),
bytearray(b'\x04@\'b\'{\x15H\xb0\x9c?\xe5dg\xbf\xe4\'\xe1D\xf7FIs\xb9\x153\x87x\xcb\xb7\xf6b\x9b\xe5\x10_\xfc%Z\x87\xa5\xae(\x13\xb1*]_g\xd4\xeaeH\x83\xed\xa0N\x82Mqz;\xbba\x0f\xf6\x9c\x08"\xca\x00\x8fq\xc5\xc7\t{\xf1l_h\x05\xec\x9a\x19N\x98+%=?\x14\xbf0\x94\x13"'),
bytearray(b"\x04pM\xfe\xf0+h\xe3\x9d\xda\xe1x1\x02}\xa4\xa2\x83\'\xfem\x1a;\xbf\x10\xd7\xb2\xd9I\x06-\x9fY\xa3k9\xc4\xc8\xda\x1e>G\xaf\xcb|\x01\xd6j\xff|\xe0>\x81I\x8b\x03\xd3\xf8\xc9|\xab&w\xf8\x1b\x9a\x98\xb1CXAU\t\x03\xd6\xcf\xa0L\xd1B \x13Mr\xbe\x8b\xe6}\xf2\xb2oc\x98A\x94\x9eX"),
bytearray(b'\x04\x1a[X\x13\x17"^\x02\x19d\xc4\xec\x14\xea<\x8c\xd2f\x95\xb4b\xdc\xbbG;pq\x9a^\xf8\xd0\xe7\x99Ofk\x1e#\x8dZ\xcb\xbf\x1e=p\xaa\xe5\x92\xda^\xb2\x86\xdf\xf8(\xfcIc\xde\xcempP\x82\xcd\x88\xe3\x87\xd1\x8b\xac\xe5\x19\xd4)\ndPX\\)\xf7\x1c\xdef\x0e` \x13\xa1\xa8YSun4'),
bytearray(b"\x04\xce\xbe\xb9{$#\x03c\xdemi\xf0\xec\x07]Q8^\x8b\xdd,)~\x972]cI\xbe\xc9\x8b\xa0\xd7\xc7\x96H\xa4\xea\xb2\x86%\xee\xb2\xc8\x08\x1d\xa4\xb9\xc5Bc \xac-;J{\x10\xafh\xceU*+h\xda&7\'\x15<x\xa8\xb9\xbecR\x97\xff<\xb2\xba\x92!\xc6|\xb1\xb5\x01\xb5c\xc9|\xe7\xbd\x01")],
'secp521r1' : [
bytearray(b"\x04\x01\xf9\xe3\x88\xcdU\xeb\xda.3\x8b\xf8\xc2\x82M\xd9\xf1@\x9d\xa6\xee\xa4\xc7\x82\xbf\x81S\xce\xedQ\xb4o,(>\xb7d5\xfd\x94\x86\xd3\xe8=\xcc\xbf\x8d\x07\x17\xc9(\x17U@gH\x8d]\xc5\xe2\xe2;.S\xf9\xa1\x00\xc2\xb5\xb7\'\x05f\xe6\xf3\xf7Za\xa1\xa4\x9209\xf3I\xe3\xdd%\xd1\x8a\x82\n4Z\xa1ol?l(\x939_+(\x1c\xca\xa4\xc3\xdb\x01\x19\xc5\xb4\xfc\xb7\xa8\xa4\xd3\x14x\x0c\x1f\x91\xd1!5\x1a\xb0\x0b\xa7\xe9"),
bytearray(b'\x04\x01\xban\x80\x85\xe8\xc7\xd0r\x17\x84\xea\x16\xc0\xfdM\xde\x98\xfe\x82\xd9\x06{\t\x1f*\xa2(t\xd4\x95y\xb7\x98\xbbP\xf1\xd9_9\xe3\xd3\xf8\xf1\xa9\xec\x1c\xce\xf6\\\xb1\xb6`|\xb9`]Wy\xaf\x99\xfc\xc2\xa5$\xd9\x01\xb5Y\x85\x85.\xc8\x8a\x94\xde\xbc\xe6m/\x04C 6|m\x92\x00\xfan*\x1c\xb7z\xbc\xc4|\xea,/t\xc7,"<R5h\x95\xf9\xc3%\x87\xa6!\x97\xa9\x94\xc7\t=\x1d\x8b,\xb6\xb5\xafF_r\\V'),
bytearray(b'\x04\x01\xf5?\xbf\x065\x9bB}\xdb\x90\xadD\xd6\xe2?e\xae\xb9\x13\xa8zZ7\xa0\xa3\xf1}b3\\\x08\x81d~V\\;\xd2\x9a\xc9\x93\x84-e\'\x9cy\xc1t\xaa\xce\x0f\x9a\xfdk\x1c9\xf6R\xeb\xa1\xf4kw\x10\x01P)]\xfb\xc7n\xb7\xfe\xd8\xdaO\xc9DK\xbb\xb4/\xfb\x17J\x98\xaen\xd4\x93\x16n\xb1\x95\x94\xe5\xc6\xfd\x0bADj\x0e\xc1\xf5\x81`\xc8\xe9;X\ttr\xb1.\x96f\xe2\xc9^?\xf7r=\xf2"\x9f}<'),
bytearray(b'\x04\x01g3\xe2\x1f\x8b|$#V\xa0\x05\xd0=\xc6\xdf\xd9\xaf\xf2&\xebEn\xf6?9\xfaQ\xfb\x94\x8be3\x1f\xb3\x91\xa5|3\x981\x8d\x1d\x92QL\xd6\xa3\x80o++9\xaf#cN\xe8\x19O\x84+\x8e\x1cT\xf8\x00\xca\xe2\x01\xbc\xd9\xa4\xccV\xa0\x1d\xb7\xe7\xecm{\xa9<\xc31o&\xfaq\xba\x1av\x80\x1c\x06\xd3\xad\x95-\x9d\x03\x1e\x97}\xd2??\xb8\xb3r\x94\xd1\xba\x9aC\x95\xe2\xab\xd1\xe3V2\x0f\xbe\xce\xdb\xbamT\xf7\xd3'),
bytearray(b'\x04\x01~\xea\x9a?\xc3[\x99\x8f\xa0z\x1a\x95\xa8T\xd6Y\xc9\x90\xbe\\!\x82\xd2\x04"/\xe7\xf1\xb9,\x7f~\x12\xc3\xe4\xcd\x9f\xf0.!\x1c?2v\x0b\xa7\x04\xe64\x8c\x1a2V\x91\x07\xe2\xc8\x182\xc6\x9b\x9e\xe8\x02\xc1\x00\x05\xfd\xc5\x16S\xa4\x97Ds\x95\xb4Md\xd79\x1cn\xdfLC\'\x02\xcf\x9f\xdb\xa8\xd5\x88\x99\xb3/\xb4M\x8fN\xcf\x81\xeb\x97z\x05\x17\xb4\xcdb\x86\x86\x84\\\xe1Y\x96\xf09\x02\xa79S9\x15\x91\xce\xd84g'),
bytearray(b'\x04\x01\xbc\xcd7\xb4\x03\xfa.\x0e\x01\xf7\x13\xa4e\xd9\xfd\xcb\xb9\xfb\x8c\xf5\x1e\x1b\xafU\xedN\x00C\xe7b\xcf\x0c\xcd"\x9a\xec\xec\xf6\xce\xbf\x9a\x9d&\x12\x03\x05T,\x98*\xbc0g\xf5\x9e{/B\xdd5dv\xafNs\x01\xe0\x8d\xf9\x8b\x92\xa0\x9f\xf3\xf8oi\xba\xe8(\xc9\xa2R\x8b\xf9C\xa1):A"\xec\x80\xf5\x94\xb2\xd7\x1d\xc0\x9eU\x10\x18\xd9\xc6 i\\0\xb1\xc5\xc1S\xac\x94< \xb1\xe7\xf0L[\x02T\xde\xac0\xb90\xa4\x05')]
}
def _ec_key_share(name):
if name in _ec_precomputed:
return random.choice(_ec_precomputed[name])
generator = getCurveByName(name).generator
secret = random.randint(2, generator.order())
ret = encodeX962Point(generator * secret)
return ret
_ff_precomputed = {
'ffdhe8192' : [
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}
def _ff_key_share(name):
if name in _ff_precomputed:
return random.choice(_ff_precomputed[name])
ff_map = {'ffdhe8192' : goodGroupParameters[6],
'ffdhe6144' : goodGroupParameters[5],
'ffdhe4096' : goodGroupParameters[4],
'ffdhe3072' : goodGroupParameters[3],
'ffdhe2048' : goodGroupParameters[2]}
generator = ff_map[name]
secret = random.randint(2, generator[1])
ret = numberToByteArray(powMod(generator[0], secret, generator[1]))
return ret
class Xmas_tree(HelloConfig):
"""
Create a Xmas tree (all options enabled) Client Hello message
Creates a ClientHello message with maximum number of options enabled,
currently for TLS 1.3 protocol.
"""
def __init__(self):
super(Xmas_tree, self).__init__()
self._name = "Xmas tree"
self.version = (3, 4)
self.record_version = (3, 4)
self.ciphers = []
self.ciphers.extend(CipherSuite.ecdheEcdsaSuites)
self.ciphers.extend(CipherSuite.ecdheCertSuites)
self.ciphers.extend(CipherSuite.dheCertSuites)
self.ciphers.extend(range(0x0100, 0x0200))
self.ciphers.extend(CipherSuite.dheDssSuites)
self.ciphers.extend(CipherSuite.certSuites)
ext = self.extensions = []
ext.append(SNIExtension())
ext.append(TLSExtension(extType=ExtensionType.renegotiation_info)
.create(bytearray(1)))
groups =[GroupName.secp256r1,
GroupName.secp384r1,
GroupName.secp521r1,
GroupName.ecdh_x25519,
GroupName.ecdh_x448]
groups.extend(GroupName.allFF)
ext.append(SupportedGroupsExtension().create(groups))
formats = [ECPointFormat.uncompressed,
ECPointFormat.ansiX962_compressed_prime,
ECPointFormat.ansiX962_compressed_char2]
ext.append(ECPointFormatsExtension().create(formats))
ext.append(TLSExtension(extType=ExtensionType.session_ticket))
ext.append(TLSExtension(extType=ExtensionType.max_fragment_legth)
.create(bytearray(b'\x04')))
ext.append(NPNExtension())
ext.append(TLSExtension(extType=ExtensionType.alpn)
.create(bytearray(b'\x00\x15' +
b'\x02' + b'h2' +
b'\x08' + b'spdy/3.1' +
b'\x08' + b'http/1.1')))
ext.append(TLSExtension(extType=ExtensionType.status_request)
.create(bytearray(b'\x01' +
b'\x00\x00' +
b'\x00\x00')))
ext.append(TLSExtension(extType=ExtensionType.status_request_v2)
.create(bytearray(b'\x00\x07' + # overall length
b'\x02' + # status type
b'\x00\x04' + # request field length
b'\x00\x00' + # responder id list
b'\x00\x00'))) # request extensions
sig_algs = []
# some not yet standardised algorithms:
for s_alg in [4, 5, 6, 7]:
for alg in ['sha256', 'sha384', 'sha512']:
sig_algs.append((getattr(HashAlgorithm, alg),
s_alg))
# some not yet standardised hashes:
for s_alg in [SignatureAlgorithm.rsa, SignatureAlgorithm.ecdsa]:
for alg in [7, 8, 9, 10, 11]:
sig_algs.append((alg, s_alg))
for alg in ['sha256', 'sha384', 'sha512', 'sha224', 'sha1', 'md5']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.rsa))
for alg in ['sha256', 'sha384', 'sha512', 'sha224', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.ecdsa))
for alg in ['sha256', 'sha384', 'sha512', 'sha224', 'sha1', 'md5']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.dsa))
ext.append(SignatureAlgorithmsExtension()
.create(sig_algs))
ext.append(KeyShareExtension()
.create([(GroupName.secp384r1, _ec_key_share('secp384r1')),
(GroupName.secp256r1, _ec_key_share('secp256r1')),
(GroupName.secp521r1, _ec_key_share('secp521r1')),
(GroupName.ffdhe8192, _ff_key_share('ffdhe8192'))]))
ext.append(TLSExtension(extType=ExtensionType.heartbeat)
.create(bytearray(b'\x01'))) # peer allowed to send
ext.append(PaddingExtension().create(512))
ext.append(TLSExtension(extType=ExtensionType.encrypt_then_mac))
# place an empty extension to trigger intolerancies in specific servers
ext.append(TLSExtension(extType=ExtensionType.extended_master_secret))
# interesting ones are 0, 1
self.compression_methods = list(range(0, 80))
class HugeCipherList(HelloConfig):
"""Client Hello with list of ciphers that doesn't fit a single record"""
def __init__(self):
super(HugeCipherList, self).__init__()
self._name = "Huge Cipher List"
self.record_version = (3, 1)
self.version = (3, 3)
self.ciphers = []
self.ciphers.extend(CipherSuite.ecdheEcdsaSuites)
self.ciphers.extend(CipherSuite.ecdheCertSuites)
self.ciphers.extend(CipherSuite.dheCertSuites)
self.ciphers.extend(CipherSuite.dheDssSuites)
self.ciphers.extend(CipherSuite.certSuites)
self.ciphers.extend(range(0x2000, 0x2000+8192))
class VeryCompatible(HelloConfig):
"""
Cipher compatible client hello with minimal intolerancies
Create a Client Hello that can connect to as many servers as possible
without triggering intolerancies (with the exception of TLS extension
intolerance)
"""
def __init__(self):
super(VeryCompatible, self).__init__()
self._name = "Very Compatible"
self.version = (3, 3)
self.record_version = (3, 1)
self.ciphers = [CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA256,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_RSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_RSA_WITH_RC4_128_SHA,
CipherSuite.TLS_RSA_WITH_RC4_128_MD5,
CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
ext = self.extensions = []
ext.append(SNIExtension())
ext.append(SupportedGroupsExtension().create([GroupName.secp256r1,
GroupName.secp384r1,
GroupName.secp521r1]))
ext.append(ECPointFormatsExtension().create([ECPointFormat.uncompressed]))
ext.append(TLSExtension(extType=ExtensionType.session_ticket))
ext.append(NPNExtension())
ext.append(TLSExtension(extType=ExtensionType.alpn)
.create(bytearray(b'\x00\x15' +
b'\x02' + b'h2' +
b'\x08' + b'spdy/3.1' +
b'\x08' + b'http/1.1')))
ext.append(TLSExtension(extType=ExtensionType.status_request)
.create(bytearray(b'\x01' +
b'\x00\x00' +
b'\x00\x00')))
sig_algs = []
for alg in ['sha256', 'sha384', 'sha512', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.rsa))
for alg in ['sha256', 'sha384', 'sha512', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.ecdsa))
for alg in ['sha256', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, alg),
SignatureAlgorithm.dsa))
ext.append(SignatureAlgorithmsExtension()
.create(sig_algs))
class IE_6(HelloConfig):
"""Create a Internet Explorer 6-like Client Hello message"""
def __init__(self):
super(IE_6, self).__init__()
self._name = "IE 6"
self.version = (3, 0)
self.record_version = (0, 2)
self.ciphers = []
self.ciphers.extend([CipherSuite.TLS_RSA_WITH_RC4_128_MD5,
CipherSuite.TLS_RSA_WITH_RC4_128_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
CipherSuite.SSL_CK_RC4_128_WITH_MD5,
CipherSuite.SSL_CK_DES_192_EDE3_CBC_WITH_MD5,
CipherSuite.SSL_CK_RC2_128_CBC_WITH_MD5,
CipherSuite.TLS_RSA_WITH_DES_CBC_SHA,
CipherSuite.SSL_CK_DES_64_CBC_WITH_MD5,
CipherSuite.TLS_RSA_EXPORT1024_WITH_RC4_56_SHA,
CipherSuite.TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA,
CipherSuite.TLS_RSA_EXPORT_WITH_RC4_40_MD5,
CipherSuite.TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5,
CipherSuite.SSL_CK_RC4_128_EXPORT40_WITH_MD5,
CipherSuite.SSL_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
CipherSuite.TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_DES_CBC_SHA,
CipherSuite.TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA])
self.ssl2=True
class IE_8_Win_XP(HelloConfig):
"""Create a Internet Explorer 8 on WinXP-like Client Hello message"""
def __init__(self):
super(IE_8_Win_XP, self).__init__()
self._name = "IE 8 on Win XP"
self.version = (3, 1)
self.record_version = (3, 0)
self.ciphers = []
self.ciphers.extend([CipherSuite.TLS_RSA_WITH_RC4_128_MD5,
CipherSuite.TLS_RSA_WITH_RC4_128_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_RSA_WITH_DES_CBC_SHA,
CipherSuite.TLS_RSA_EXPORT1024_WITH_RC4_56_SHA,
CipherSuite.TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA,
CipherSuite.TLS_RSA_EXPORT_WITH_RC4_40_MD5,
CipherSuite.TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5,
CipherSuite.TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_DES_CBC_SHA,
CipherSuite.TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA])
class IE_11_Win_7(HelloConfig):
"""Create an Internet Explorer 11 on Win7-like Client Hello message"""
def __init__(self):
super(IE_11_Win_7, self).__init__()
self._name = "IE 11 on Win 7"
self.version = (3, 3)
self.record_version = (3, 1)
self.ciphers = []
self.ciphers.extend([CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA256,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_RC4_128_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,
CipherSuite.TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_RSA_WITH_RC4_128_MD5])
ext = self.extensions = []
ext.append(SNIExtension())
ext.append(TLSExtension(extType=ExtensionType.renegotiation_info)
.create(bytearray(1)))
groups = [GroupName.secp256r1,
GroupName.secp384r1]
ext.append(SupportedGroupsExtension().create(groups))
ext.append(TLSExtension(extType=ExtensionType.status_request)
.create(bytearray(b'\x01' +
b'\x00\x00' +
b'\x00\x00')))
sig_algs = []
for s_alg in ['rsa', 'ecdsa']:
for h_alg in ['sha256', 'sha384', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, h_alg),
getattr(SignatureAlgorithm, s_alg)))
sig_algs.append((HashAlgorithm.sha1, SignatureAlgorithm.dsa))
ext.append(SignatureAlgorithmsExtension().create(sig_algs))
class IE_11_Win_8_1(HelloConfig):
"""Create an Internet Explorer 11 on Win8.1-like Client Hello message"""
def __init__(self):
super(IE_11_Win_8_1, self).__init__()
self._name = "IE 11 on Win 8.1"
self.version = (3, 3)
self.record_version = (3, 1)
self.ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA256,
CipherSuite.TLS_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,
CipherSuite.TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
CipherSuite.TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA]
ext = self.extensions = []
ext.append(SNIExtension())
ext.append(TLSExtension(extType=ExtensionType.renegotiation_info)
.create(bytearray(1)))
groups = [GroupName.secp256r1,
GroupName.secp384r1]
ext.append(SupportedGroupsExtension().create(groups))
ext.append(TLSExtension(extType=ExtensionType.session_ticket))
ext.append(TLSExtension(extType=ExtensionType.status_request)
.create(bytearray(b'\x01' +
b'\x00\x00' +
b'\x00\x00')))
sig_algs = []
for s_alg in ['rsa', 'ecdsa']:
for h_alg in ['sha256', 'sha384', 'sha1']:
sig_algs.append((getattr(HashAlgorithm, h_alg),
getattr(SignatureAlgorithm, s_alg)))
sig_algs.append((HashAlgorithm.sha1, SignatureAlgorithm.dsa))
ext.append(SignatureAlgorithmsExtension().create(sig_algs))
ext.append(NPNExtension())
ext.append(TLSExtension(extType=ExtensionType.alpn)
.create(bytearray(b'\x00\x10' +
b'\x06' + b'spdy/3' +
b'\x08' + b'http/1.1')))

View File

@ -3,11 +3,13 @@
"""Extra TLS extensions."""
import binascii
import tlslite.extensions
from tlslite.utils.codec import Writer
from tlslite.utils.compat import b2a_hex
from .constants import ExtensionType, GroupName
import .messages
from . import messages
# make TLSExtensions hashable (__eq__ is already defined in base class)
tlslite.extensions.TLSExtension.__hash__ = lambda self: hash(self.extType) ^ \

View File

@ -1,9 +1,21 @@
# Copyright (c) 2016 Hubert Kario
# Released under Mozilla Public License 2.0
"""Methods for modifying the scan configurations on the fly."""
from __future__ import print_function
from tlslite.constants import CipherSuite
from tlslite.extensions import SNIExtension, PaddingExtension, TLSExtension
import itertools
def no_sni(generator):
if not generator.extensions:
return generator
generator.extensions[:] = (x for x in generator.extensions
if not isinstance(x, SNIExtension))
generator.modifications.append("no SNI")
return generator
proto_versions = {(3, 0): "SSLv3",
(3, 1): "TLSv1.0",
@ -27,3 +39,109 @@ def set_hello_version(generator, version):
generator.version = version
generator.modifications += [version_to_str(version)]
return generator
def set_record_version(generator, version):
"""Set record version, un-SSLv2-ify"""
generator.record_version = version
generator.ciphers[:] = (i for i in generator.ciphers if i <= 0xffff)
generator.ssl2 = False
generator.modifications += ["r/{0}".format(version_to_str(version))]
return generator
def no_extensions(generator):
"""Remove extensions"""
generator.extensions = None
generator.modifications += ["no ext"]
return generator
def divceil(divident, divisor):
quot, r = divmod(divident, divisor)
return quot + int(bool(r))
def truncate_ciphers_to_size(generator, size):
"""Truncate list of ciphers until client hello is no bigger than size"""
def cb_fun(client_hello, size=size):
hello_len = len(client_hello.write())
bytes_to_remove = hello_len - size
if bytes_to_remove > 0:
ciphers_to_remove = divceil(bytes_to_remove, 2)
client_hello.cipher_suites[:] = \
client_hello.cipher_suites[:-ciphers_to_remove]
return client_hello
generator.callbacks.append(cb_fun)
generator.modifications += ["trunc c/{0}".format(size)]
return generator
def append_ciphers_to_size(generator, size):
"""
Add ciphers from the 0x2000-0xa000 range until size is reached
Increases the size of the Client Hello message until it is at least
`size` bytes long. Uses cipher ID's from the 0x2000-0xc000 range to do
it (0x5600, a.k.a TLS_FALLBACK_SCSV, excluded)
"""
def cb_fun(client_hello, size=size):
ciphers_iter = iter(range(0x2000, 0xc000))
ciphers_present = set(client_hello.cipher_suites)
# we don't want to add a cipher id with special meaning
# and the set is used only internally
ciphers_present.add(CipherSuite.TLS_FALLBACK_SCSV)
bytes_to_add = size - len(client_hello.write())
if bytes_to_add > 0:
ciphers_to_add = divceil(bytes_to_add, 2)
ciphers_gen = (x for x in ciphers_iter
if x not in ciphers_present)
client_hello.cipher_suites.extend(itertools.islice(ciphers_gen,
ciphers_to_add))
return client_hello
generator.callbacks.append(cb_fun)
generator.modifications += ["append c/{0}".format(size)]
return generator
def extend_with_ext_to_size(generator, size):
"""
Add the padding extension so that the Hello is at least `size` bytes
Either adds a padding extension or extends an existing one so that
the specified size is reached
"""
def cb_fun(client_hello, size=size):
if len(client_hello.write()) > size:
return client_hello
if not client_hello.extensions:
client_hello.extensions = []
ext = next((x for x in client_hello.extensions
if isinstance(x, PaddingExtension)), None)
if not ext:
ext = PaddingExtension()
client_hello.extensions.append(ext)
# check if just adding the extension, with no payload, haven't pushed
# us over the limit
bytes_to_add = size - len(client_hello.write())
if bytes_to_add > 0:
ext.paddingData += bytearray(bytes_to_add)
return client_hello
generator.callbacks.append(cb_fun)
generator.modifications += ["append e/{0}".format(size)]
return generator
def add_empty_ext(generator, ext_type):
if generator.extensions is None:
generator.extensions = []
generator.extensions += [TLSExtension(extType=ext_type)
.create(bytearray(0))]
generator.modifications += ["add ext {0}".format(ext_type)]
return generator

View File

@ -10,7 +10,7 @@ from tlslite.messages import ClientHello
from tlslite.extensions import SNIExtension, SupportedGroupsExtension, \
ECPointFormatsExtension, NPNExtension, SignatureAlgorithmsExtension
from tlslite.utils.codec import Parser
from cscan.config import Firefox_42
from cscan.config import Firefox_42, Xmas_tree, Firefox_46
from cscan.extensions import RenegotiationExtension
from cscan.constants import ExtensionType
@ -45,6 +45,54 @@ class TestFirefox(unittest.TestCase):
SignatureAlgorithmsExtension)
self.assertEqual(ch.compression_methods, [0])
def test_firefox_46(self):
gen = Firefox_46()
ch = gen(bytearray(b'example.com'))
self.assertIsNotNone(ch)
self.assertIsInstance(ch, ClientHello)
self.assertEqual(len(ch.write()), 180)
self.assertEqual(ch.client_version, (3, 3))
self.assertEqual(gen.record_version, (3, 1))
self.assertEqual(len(ch.cipher_suites), 11)
self.assertIsInstance(ch.extensions[0], SNIExtension)
self.assertEqual(ch.extensions[1].extType,
ExtensionType.extended_master_secret)
self.assertEqual(ch.extensions[2].extType,
ExtensionType.renegotiation_info)
self.assertIsInstance(ch.extensions[3],
SupportedGroupsExtension)
self.assertIsInstance(ch.extensions[4],
ECPointFormatsExtension)
self.assertEqual(ch.extensions[5].extType,
ExtensionType.session_ticket)
# bug in tlslite-ng, removes NPN extensions from provided extensions
#self.assertIsInstance(ch.extensions[6],
# NPNExtension)
self.assertEqual(ch.extensions[6].extType,
ExtensionType.alpn)
self.assertEqual(ch.extensions[7].extType,
ExtensionType.status_request)
self.assertIsInstance(ch.extensions[8],
SignatureAlgorithmsExtension)
self.assertEqual(ch.compression_methods, [0])
class TestXmasTree(unittest.TestCase):
def test_xmas_tree_tls_1_3(self):
ch = Xmas_tree()(bytearray(b'example.com'))
self.assertIsNotNone(ch)
self.assertIsInstance(ch, ClientHello)
self.assertEqual(len(ch.write()), 2792)
def test_xmas_tree_tls_1_3_parse(self):
ch = Xmas_tree()(bytearray(b'example.com'))
parser = Parser(ch.write()[1:])
client_hello = ClientHello()
client_hello.parse(parser)
if __name__ == "__main__":
unittest.main()

View File

@ -0,0 +1,45 @@
# Copyright (c) 2015 Hubert Kario
# Released under Mozilla Public License Version 2.0
try:
import unittest2 as unittest
except ImportError:
import unittest
from cscan.config import HugeCipherList, Firefox_42
from cscan.modifiers import truncate_ciphers_to_size, append_ciphers_to_size, \
extend_with_ext_to_size
class TestTruncateCiphersToSize(unittest.TestCase):
def test_with_big_hello(self):
gen = HugeCipherList()
self.assertGreater(len(gen(b'localhost').write()), 2**14)
self.assertEqual(gen(b'localhost').cipher_suites[0], 49196)
gen = truncate_ciphers_to_size(gen, 2**12)
self.assertEqual(len(gen(b'localhost').write()), 2**12-1)
self.assertEqual(gen(b'localhost').cipher_suites[0], 49196)
class TestAppendCiphersToSize(unittest.TestCase):
def test_with_small_hello(self):
gen = Firefox_42()
self.assertLess(len(gen(b'localhost').write()), 2**10)
self.assertEqual(gen(b'localhost').cipher_suites[0], 49195)
gen = append_ciphers_to_size(gen, 2**12)
self.assertEqual(len(gen(b'localhost').write()), 2**12)
self.assertEqual(gen(b'localhost').cipher_suites[0], 49195)
class TestExtendWithExtToSize(unittest.TestCase):
def test_with_small_hello(self):
gen = Firefox_42()
self.assertLess(len(gen(b'localhost').write()), 2**10)
gen = extend_with_ext_to_size(gen, 2**12)
self.assertEqual(len(gen(b'localhost').write()), 2**12)