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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 unittest
from unittest.mock import Mock
import platform
import re
import json
import binascii
from autobahn.wamp import auth
from autobahn.wamp import types
# these test vectors are all for HMAC-SHA1
PBKDF2_TEST_VECTORS = [
# From RFC 6070
(b'password', b'salt', 1, 20, '0c60c80f961f0e71f3a9b524af6012062fe037a6'),
(b'password', b'salt', 2, 20, 'ea6c014dc72d6f8ccd1ed92ace1d41f0d8de8957'),
# From Crypt-PBKDF2
(b'password', b'ATHENA.MIT.EDUraeburn', 1, 16, 'cdedb5281bb2f801565a1122b2563515'),
(b'password', b'ATHENA.MIT.EDUraeburn', 1, 32, 'cdedb5281bb2f801565a1122b25635150ad1f7a04bb9f3a333ecc0e2e1f70837'),
(b'password', b'ATHENA.MIT.EDUraeburn', 2, 16, '01dbee7f4a9e243e988b62c73cda935d'),
(b'password', b'ATHENA.MIT.EDUraeburn', 2, 32, '01dbee7f4a9e243e988b62c73cda935da05378b93244ec8f48a99e61ad799d86'),
(b'password', b'ATHENA.MIT.EDUraeburn', 1200, 32, '5c08eb61fdf71e4e4ec3cf6ba1f5512ba7e52ddbc5e5142f708a31e2e62b1e13'),
(b'X' * 64, b'pass phrase equals block size', 1200, 32, '139c30c0966bc32ba55fdbf212530ac9c5ec59f1a452f5cc9ad940fea0598ed1'),
(b'X' * 65, b'pass phrase exceeds block size', 1200, 32, '9ccad6d468770cd51b10e6a68721be611a8b4d282601db3b36be9246915ec82a'),
]
if platform.python_implementation() != 'PyPy':
# the following fails on PyPy: "RuntimeError: maximum recursion depth exceeded"
PBKDF2_TEST_VECTORS.extend(
[
# From RFC 6070
(b'password', b'salt', 4096, 20, '4b007901b765489abead49d926f721d065a429c1'),
(b'passwordPASSWORDpassword', b'saltSALTsaltSALTsaltSALTsaltSALTsalt', 4096, 25, '3d2eec4fe41c849b80c8d83662c0e44a8b291a964cf2f07038'),
(b'pass\x00word', b'sa\x00lt', 4096, 16, '56fa6aa75548099dcc37d7f03425e0c3'),
# This one is from the RFC but it just takes for ages
# (b'password', b'salt', 16777216, 20, 'eefe3d61cd4da4e4e9945b3d6ba2158c2634e984'),
]
)
class TestWampAuthHelpers(unittest.TestCase):
def test_pbkdf2(self):
for tv in PBKDF2_TEST_VECTORS:
result = auth.pbkdf2(tv[0], tv[1], tv[2], tv[3], 'sha1')
self.assertEqual(type(result), bytes)
self.assertEqual(binascii.hexlify(result).decode('ascii'), tv[4])
def test_generate_totp_secret_default(self):
secret = auth.generate_totp_secret()
self.assertEqual(type(secret), str)
self.assertEqual(len(secret), 10 * 8 / 5)
def test_generate_totp_secret_length(self):
for length in [5, 10, 20, 30, 40, 50]:
secret = auth.generate_totp_secret(length)
self.assertEqual(type(secret), str)
self.assertEqual(len(secret), length * 8 / 5)
def test_compute_totp(self):
pat = re.compile(r"\d\d\d\d\d\d")
secret = "MFRGGZDFMZTWQ2LK"
signature = auth.compute_totp(secret)
self.assertEqual(type(signature), str)
self.assertTrue(pat.match(signature) is not None)
def test_compute_totp_offset(self):
pat = re.compile(r"\d\d\d\d\d\d")
secret = "MFRGGZDFMZTWQ2LK"
for offset in range(-10, 10):
signature = auth.compute_totp(secret, offset)
self.assertEqual(type(signature), str)
self.assertTrue(pat.match(signature) is not None)
def test_derive_key(self):
secret = 'L3L1YUE8Txlw'
salt = 'salt123'
key = auth.derive_key(secret.encode('utf8'), salt.encode('utf8'))
self.assertEqual(type(key), bytes)
self.assertEqual(key, b"qzcdsr9uu/L5hnss3kjNTRe490ETgA70ZBaB5rvnJ5Y=")
def test_generate_wcs_default(self):
secret = auth.generate_wcs()
self.assertEqual(type(secret), bytes)
self.assertEqual(len(secret), 14)
def test_generate_wcs_length(self):
for length in [5, 10, 20, 30, 40, 50]:
secret = auth.generate_wcs(length)
self.assertEqual(type(secret), bytes)
self.assertEqual(len(secret), length)
def test_compute_wcs(self):
secret = 'L3L1YUE8Txlw'
challenge = json.dumps([1, 2, 3], ensure_ascii=False).encode('utf8')
signature = auth.compute_wcs(secret.encode('utf8'), challenge)
self.assertEqual(type(signature), bytes)
self.assertEqual(signature, b"1njQtmmeYO41N5EWEzD2kAjjEKRZ5kPZt/TzpYXOzR0=")
@unittest.skipIf(not auth.HAS_ARGON, 'no Argon2 library')
class TestScram(unittest.TestCase):
def test_argon2id_static(self):
# re-generate from the official argon2 tools:
# echo -n "p4ssw0rd" | argon2 '1234567890abcdef' -id -t 32 -m 9 -p 1 -l 32
expected = binascii.unhexlify('ee4a8acf9d5958354fb79a95ae20692d05e42591ba49fae85eb6700e8b0ed293')
raw_hash = auth._hash_argon2id13_secret(
b'p4ssw0rd',
binascii.b2a_base64(b'1234567890abcdef'), # ours takes base64-encoded salt
32, # this is WAY TOO SMALL; for production, use 4096 or higher
512, # note that the argon2 utility takes a "power of 2", so "-m 9" above == 512
)
decoded_hash = binascii.a2b_base64(raw_hash + b'==\n')
self.assertEqual(expected, decoded_hash)
def test_pbkdf2_static(self):
expected = binascii.unhexlify('f6991a28c75f43751e0d75499fd7b8649f659118ddc1d61cee5883af547d15f5')
# 8 iterations is WAY TOO FEW for production; this is a test
raw_hash = auth._hash_pbkdf2_secret(b'p4ssw0rd', b'1234567890abcdef', 8)
self.assertEqual(raw_hash, expected)
def test_basic(self):
scram = auth.AuthScram(
nonce='1234567890abcdef',
kdf='argon2id13',
salt=binascii.b2a_hex(b'1234567890abcdef').decode('ascii'),
iterations=32, # far too few; use 4096 or more for production
memory=512,
password='p4ssw0rd',
authid='username',
)
# thought: if we could import crossbar code here, we could
# test the "other side" of this with fewer mocks
# (i.e. hard-coding the client nonce)
scram._client_nonce = binascii.b2a_hex(b'1234567890abcdef').decode('ascii')
self.assertEqual(
{'nonce': '31323334353637383930616263646566'},
scram.authextra,
)
challenge = types.Challenge('scram', {
'nonce': '1234567890abcdeffedcba0987654321',
'kdf': 'argon2id-13',
'salt': binascii.b2a_hex(b'1234567890abcdef').decode('ascii'),
'iterations': 32,
'memory': 512,
})
reply = scram.on_challenge(Mock(), challenge)
self.assertEqual(
b'f5r3loERzGVSuimE+lvO0bWna2zyswBo0HrZkaaEy38=',
reply,
)
authextra = dict(
scram_server_signature=b'f5r3loERzGVSuimE+lvO0bWna2zyswBo0HrZkaaEy38=',
)
scram.on_welcome(Mock(), authextra)
def test_no_memory_arg(self):
scram = auth.AuthScram(
nonce='1234567890abcdef',
kdf='argon2id13',
salt=binascii.b2a_hex(b'1234567890abcdef').decode('ascii'),
iterations=4096,
memory=512,
password='p4ssw0rd',
authid='username',
)
scram.authextra
with self.assertRaises(ValueError) as ctx:
challenge = types.Challenge('scram', {
'nonce': '1234567890abcdeffedcba0987654321',
'kdf': 'argon2id-13',
'salt': binascii.b2a_hex(b'1234567890abcdef'),
'iterations': 4096,
# no 'memory' key
})
scram.on_challenge(Mock(), challenge)
self.assertIn(
"requires 'memory' parameter",
str(ctx.exception)
)
def test_unknown_arg(self):
scram = auth.AuthScram(
nonce='1234567890abcdef',
kdf='argon2id13',
salt=binascii.b2a_hex(b'1234567890abcdef'),
iterations=4096,
memory=512,
password='p4ssw0rd',
authid='username',
)
scram.authextra
with self.assertRaises(RuntimeError) as ctx:
challenge = types.Challenge('scram', {
'nonce': '1234567890abcdeffedcba0987654321',
'kdf': 'argon2id-13',
'salt': binascii.b2a_hex(b'1234567890abcdef'),
'iterations': 4096,
'memory': 512,
'an_invalid_key': None
})
scram.on_challenge(Mock(), challenge)
self.assertIn("an_invalid_key", str(ctx.exception))
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