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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) Crossbar.io Technologies GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
import os
import hashlib
import binascii
import unittest
from unittest.mock import Mock
import txaio
if os.environ.get('USE_TWISTED', None):
txaio.use_twisted()
elif os.environ.get('USE_ASYNCIO', None):
txaio.use_asyncio()
else:
raise RuntimeError('need either USE_TWISTED=1 or USE_ASYNCIO=1')
from autobahn.wamp import types
from autobahn.wamp.auth import create_authenticator
from autobahn.wamp.cryptosign import _makepad, HAS_CRYPTOSIGN, CryptosignAuthextra
if HAS_CRYPTOSIGN:
from autobahn.wamp.cryptosign import CryptosignKey
from nacl.encoding import HexEncoder
import tempfile
keybody = '''-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
QyNTUxOQAAACAa38i/4dNWFuZN/72QAJbyOwZvkUyML/u2b2B1uW4RbQAAAJj4FLyB+BS8
gQAAAAtzc2gtZWQyNTUxOQAAACAa38i/4dNWFuZN/72QAJbyOwZvkUyML/u2b2B1uW4RbQ
AAAEBNV9l6aPVVaWYgpthJwM5YJWhRjXKet1PcfHMt4oBFEBrfyL/h01YW5k3/vZAAlvI7
Bm+RTIwv+7ZvYHW5bhFtAAAAFXNvbWV1c2VyQGZ1bmt0aGF0LmNvbQ==
-----END OPENSSH PRIVATE KEY-----'''
pubkey = '''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJVp3hjHwIQyEladzd8mFcf0YSXcmyKS3qMLB7VqTQKm someuser@example.com
'''
# valid test vectors for WAMP-cryptosign signature testing
test_vectors_1 = [
# _WITHOUT_ channel_id
{
'channel_id': None,
'private_key': '4d57d97a68f555696620a6d849c0ce582568518d729eb753dc7c732de2804510',
'challenge': 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
'signature': 'b32675b221f08593213737bef8240e7c15228b07028e19595294678c90d11c0cae80a357331bfc5cc9fb71081464e6e75013517c2cf067ad566a6b7b728e5d03ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'
},
{
'channel_id': None,
'private_key': 'd511fe78e23934b3dadb52fcd022974b80bd92bccc7c5cf404e46cc0a8a2f5cd',
'challenge': 'b26c1f87c13fc1da14997f1b5a71995dff8fbe0a62fae8473c7bdbd05bfb607d',
'signature': 'd4209ad10d5aff6bfbc009d7e924795de138a63515efc7afc6b01b7fe5201372190374886a70207b042294af5bd64ce725cd8dceb344e6d11c09d1aaaf4d660fb26c1f87c13fc1da14997f1b5a71995dff8fbe0a62fae8473c7bdbd05bfb607d'
},
{
'channel_id': None,
'private_key': '6e1fde9cf9e2359a87420b65a87dc0c66136e66945196ba2475990d8a0c3a25b',
'challenge': 'b05e6b8ad4d69abf74aa3be3c0ee40ae07d66e1895b9ab09285a2f1192d562d2',
'signature': '7beb282184baadd08f166f16dd683b39cab53816ed81e6955def951cb2ddad1ec184e206746fd82bda075af03711d3d5658fc84a76196b0fa8d1ebc92ef9f30bb05e6b8ad4d69abf74aa3be3c0ee40ae07d66e1895b9ab09285a2f1192d562d2'
},
# _WITH_ channel_id
{
'channel_id': '62e935ae755f3d48f80d4d59f6121358c435722a67e859cc0caa8b539027f2ff',
'private_key': '4d57d97a68f555696620a6d849c0ce582568518d729eb753dc7c732de2804510',
'challenge': 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
'signature': '9b6f41540c9b95b4b7b281c3042fa9c54cef43c842d62ea3fd6030fcb66e70b3e80d49d44c29d1635da9348d02ec93f3ed1ef227dfb59a07b580095c2b82f80f9d16ca518aa0c2b707f2b2a609edeca73bca8dd59817a633f35574ac6fd80d00'
},
{
'channel_id': '62e935ae755f3d48f80d4d59f6121358c435722a67e859cc0caa8b539027f2ff',
'private_key': 'd511fe78e23934b3dadb52fcd022974b80bd92bccc7c5cf404e46cc0a8a2f5cd',
'challenge': 'b26c1f87c13fc1da14997f1b5a71995dff8fbe0a62fae8473c7bdbd05bfb607d',
'signature': '305aaa3ac25e98f651427688b3fc43fe7d8a68a7ec1d7d61c61517c519bd4a427c3015599d83ca28b4c652333920223844ef0725eb5dc2febfd6af7677b73f01d0852a29b460fc92ec943242ac638a053bbacc200512b18b30d15083cbdc9282'
},
{
'channel_id': '62e935ae755f3d48f80d4d59f6121358c435722a67e859cc0caa8b539027f2ff',
'private_key': '6e1fde9cf9e2359a87420b65a87dc0c66136e66945196ba2475990d8a0c3a25b',
'challenge': 'b05e6b8ad4d69abf74aa3be3c0ee40ae07d66e1895b9ab09285a2f1192d562d2',
'signature': 'ee3c7644fd8070532bc1fde3d70d742267da545d8c8f03e63bda63f1ad4214f4d2c4bfdb4eb9526def42deeb7e31602a6ff99eba893e0a4ad4d45892ca75e608d2b75e24a189a7f78ca776ba36fc53f6c3e31c32f251f2c524f0a44202f2902d'
},
]
class TestSigVectors(unittest.TestCase):
def test_vectors(self):
session = Mock()
for testvec in test_vectors_1:
# setup fake transport details including fake channel_id
if testvec['channel_id']:
channel_id = binascii.a2b_hex(testvec['channel_id'])
channel_id_type = 'tls-unique'
session._transport.transport_details = types.TransportDetails(channel_id={'tls-unique': channel_id})
else:
channel_id = None
channel_id_type = None
session._transport.transport_details = types.TransportDetails(channel_id=None)
# private signing key (the seed for it)
private_key = CryptosignKey.from_bytes(binascii.a2b_hex(testvec['private_key']))
# the fake challenge we've received
challenge = types.Challenge("cryptosign", dict(challenge=testvec['challenge']))
# ok, now sign the challenge
f_signed = private_key.sign_challenge(challenge,
channel_id=channel_id,
channel_id_type=channel_id_type)
def success(signed):
# the signature returned is a Hex encoded string
self.assertTrue(type(signed) == str)
# we return the concatenation of the signature and the message signed (96 bytes)
self.assertEqual(
192,
len(signed),
)
# must match the expected value in our test vector
self.assertEqual(
testvec['signature'],
signed,
)
def failed(err):
self.fail(str(err))
txaio.add_callbacks(f_signed, success, failed)
class TestAuth(unittest.TestCase):
def setUp(self):
self.key = CryptosignKey.from_ssh_bytes(keybody)
self.privkey_hex = self.key._key.encode(encoder=HexEncoder)
# all tests here fake the use of channel_id_type='tls-unique' with the following channel_id
m = hashlib.sha256()
m.update("some TLS message".encode())
# 62e935ae755f3d48f80d4d59f6121358c435722a67e859cc0caa8b539027f2ff
channel_id = m.digest()
self.transport_details = types.TransportDetails(channel_id={'tls-unique': channel_id})
def test_public_key(self):
self.assertEqual(self.key.public_key(binary=False), '1adfc8bfe1d35616e64dffbd900096f23b066f914c8c2ffbb66f6075b96e116d')
def test_valid(self):
session = Mock()
session._transport.transport_details = self.transport_details
challenge = types.Challenge("cryptosign", dict(challenge="ff" * 32))
f_signed = self.key.sign_challenge(challenge,
channel_id=self.transport_details.channel_id['tls-unique'],
channel_id_type='tls-unique')
def success(signed):
self.assertEqual(
192,
len(signed),
)
self.assertEqual(
'9b6f41540c9b95b4b7b281c3042fa9c54cef43c842d62ea3fd6030fcb66e70b3e80d49d44c29d1635da9348d02ec93f3ed1ef227dfb59a07b580095c2b82f80f9d16ca518aa0c2b707f2b2a609edeca73bca8dd59817a633f35574ac6fd80d00',
signed,
)
def failed(err):
self.fail(str(err))
txaio.add_callbacks(f_signed, success, failed)
def test_authenticator(self):
authenticator = create_authenticator(
"cryptosign",
authid="someone",
authextra={'channel_binding': 'tls-unique'},
privkey=self.privkey_hex,
)
session = Mock()
session._transport.transport_details = self.transport_details
challenge = types.Challenge("cryptosign", dict(challenge="ff" * 32))
f_reply = authenticator.on_challenge(session, challenge)
def success(reply):
self.assertEqual(
reply,
'9b6f41540c9b95b4b7b281c3042fa9c54cef43c842d62ea3fd6030fcb66e70b3e80d49d44c29d1635da9348d02ec93f3ed1ef227dfb59a07b580095c2b82f80f9d16ca518aa0c2b707f2b2a609edeca73bca8dd59817a633f35574ac6fd80d00',
)
def failed(err):
self.fail(str(err))
txaio.add_callbacks(f_reply, success, failed)
class TestKey(unittest.TestCase):
def test_pad(self):
self.assertEqual(_makepad(0), b'')
self.assertEqual(_makepad(2), b'\x01\x02')
self.assertEqual(_makepad(3), b'\x01\x02\x03')
self.assertEqual(_makepad(30), b'\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e')
self.assertEqual(binascii.b2a_hex(_makepad(30)).decode(), '0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e')
def test_key(self):
with tempfile.NamedTemporaryFile('w+t') as fp:
fp.write(keybody)
fp.seek(0)
key = CryptosignKey.from_ssh_file(fp.name)
self.assertEqual(key.public_key(), '1adfc8bfe1d35616e64dffbd900096f23b066f914c8c2ffbb66f6075b96e116d')
def test_pubkey(self):
with tempfile.NamedTemporaryFile('w+t') as fp:
fp.write(pubkey)
fp.seek(0)
key = CryptosignKey.from_ssh_file(fp.name)
self.assertEqual(key.public_key(binary=False), '9569de18c7c0843212569dcddf2615c7f46125dc9b2292dea30b07b56a4d02a6')
self.assertEqual(key.comment, 'someuser@example.com')
class TestAuthExtra(unittest.TestCase):
def test_default_ctor(self):
ae = CryptosignAuthextra()
self.assertEqual(ae.marshal(), {})
def test_ctor(self):
ae1 = CryptosignAuthextra(pubkey=b'\xff' * 32)
self.assertEqual(ae1.marshal(), {
'pubkey': 'ff' * 32
})
ae1 = CryptosignAuthextra(pubkey=b'\xff' * 32, bandwidth=200)
self.assertEqual(ae1.marshal(), {
'pubkey': 'ff' * 32,
'reservation': {
'bandwidth': 200
}
})
def test_parse(self):
data_original = {
'pubkey': '9019a424b040859c108edee02e64c1dcb32b253686d7b5db56c306e9bdb2fe7e',
'challenge': 'fe81c84e94a75a357c259d6b37361e43966a45f57dff181bb61b2f91a0f4ac88',
'channel_binding': 'tls-unique',
'channel_id': '2e642bf991f48ece9133a0a32d15550921dda12bfebfbc941571d4b2960540bc',
'trustroot': '0xe78ea2fE1533D4beD9A10d91934e109A130D0ad8',
'reservation': {
'chain_id': 999,
'block_no': 123456789,
'realm': '0x163D58cE482560B7826b4612f40aa2A7d53310C4',
'delegate': '0x72b3486d38E9f49215b487CeAaDF27D6acf22115',
'seeder': '0x52d66f36A7927cF9612e1b40bD6549d08E0513Ff',
'bandwidth': 200
},
'signature': '747763c69394270603f64af5be3f8256a14b41ff51027e583ee81db9f1f15a01cc8e55218a76139f26dbaaa78d8a537d80d248b3fc6245ecf4602cc5fbb0f6452e',
}
ae1 = CryptosignAuthextra.parse(data_original)
data_marshalled = ae1.marshal()
# FIXME: marshal check-summed eth addresses
data_original['trustroot'] = data_original['trustroot'].lower()
for k in ['realm', 'delegate', 'seeder']:
data_original['reservation'][k] = data_original['reservation'][k].lower()
self.assertEqual(data_marshalled, data_original)
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