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|
import base64
from jwt.algorithms import Algorithm, HMACAlgorithm, NoneAlgorithm
from jwt.exceptions import InvalidKeyError
from jwt.utils import base64url_decode
import pytest
from .keys import load_hmac_key
from .utils import ensure_bytes, ensure_unicode, key_path
try:
from jwt.algorithms import RSAAlgorithm, ECAlgorithm, RSAPSSAlgorithm
from .keys import load_rsa_pub_key, load_ec_pub_key
has_crypto = True
except ImportError:
has_crypto = False
class TestAlgorithms:
def test_algorithm_should_throw_exception_if_prepare_key_not_impl(self):
algo = Algorithm()
with pytest.raises(NotImplementedError):
algo.prepare_key('test')
def test_algorithm_should_throw_exception_if_sign_not_impl(self):
algo = Algorithm()
with pytest.raises(NotImplementedError):
algo.sign('message', 'key')
def test_algorithm_should_throw_exception_if_verify_not_impl(self):
algo = Algorithm()
with pytest.raises(NotImplementedError):
algo.verify('message', 'key', 'signature')
def test_none_algorithm_should_throw_exception_if_key_is_not_none(self):
algo = NoneAlgorithm()
with pytest.raises(InvalidKeyError):
algo.prepare_key('123')
def test_hmac_should_reject_nonstring_key(self):
algo = HMACAlgorithm(HMACAlgorithm.SHA256)
with pytest.raises(TypeError) as context:
algo.prepare_key(object())
exception = context.value
assert str(exception) == 'Expecting a string- or bytes-formatted key.'
def test_hmac_should_accept_unicode_key(self):
algo = HMACAlgorithm(HMACAlgorithm.SHA256)
algo.prepare_key(ensure_unicode('awesome'))
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_hmac_should_throw_exception_if_key_is_pem_public_key(self):
algo = HMACAlgorithm(HMACAlgorithm.SHA256)
with pytest.raises(InvalidKeyError):
with open(key_path('testkey2_rsa.pub.pem'), 'r') as keyfile:
algo.prepare_key(keyfile.read())
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_hmac_should_throw_exception_if_key_is_x509_certificate(self):
algo = HMACAlgorithm(HMACAlgorithm.SHA256)
with pytest.raises(InvalidKeyError):
with open(key_path('testkey_rsa.cer'), 'r') as keyfile:
algo.prepare_key(keyfile.read())
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_hmac_should_throw_exception_if_key_is_ssh_public_key(self):
algo = HMACAlgorithm(HMACAlgorithm.SHA256)
with pytest.raises(InvalidKeyError):
with open(key_path('testkey_rsa.pub'), 'r') as keyfile:
algo.prepare_key(keyfile.read())
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_hmac_should_throw_exception_if_key_is_x509_cert(self):
algo = HMACAlgorithm(HMACAlgorithm.SHA256)
with pytest.raises(InvalidKeyError):
with open(key_path('testkey2_rsa.pub.pem'), 'r') as keyfile:
algo.prepare_key(keyfile.read())
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsa_should_parse_pem_public_key(self):
algo = RSAAlgorithm(RSAAlgorithm.SHA256)
with open(key_path('testkey2_rsa.pub.pem'), 'r') as pem_key:
algo.prepare_key(pem_key.read())
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsa_should_accept_unicode_key(self):
algo = RSAAlgorithm(RSAAlgorithm.SHA256)
with open(key_path('testkey_rsa'), 'r') as rsa_key:
algo.prepare_key(ensure_unicode(rsa_key.read()))
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsa_should_reject_non_string_key(self):
algo = RSAAlgorithm(RSAAlgorithm.SHA256)
with pytest.raises(TypeError):
algo.prepare_key(None)
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsa_verify_should_return_false_if_signature_invalid(self):
algo = RSAAlgorithm(RSAAlgorithm.SHA256)
message = ensure_bytes('Hello World!')
sig = base64.b64decode(ensure_bytes(
'yS6zk9DBkuGTtcBzLUzSpo9gGJxJFOGvUqN01iLhWHrzBQ9ZEz3+Ae38AXp'
'10RWwscp42ySC85Z6zoN67yGkLNWnfmCZSEv+xqELGEvBJvciOKsrhiObUl'
'2mveSc1oeO/2ujkGDkkkJ2epn0YliacVjZF5+/uDmImUfAAj8lzjnHlzYix'
'sn5jGz1H07jYYbi9diixN8IUhXeTafwFg02IcONhum29V40Wu6O5tAKWlJX'
'fHJnNUzAEUOXS0WahHVb57D30pcgIji9z923q90p5c7E2cU8V+E1qe8NdCA'
'APCDzZZ9zQ/dgcMVaBrGrgimrcLbPjueOKFgSO+SSjIElKA=='))
sig += ensure_bytes('123') # Signature is now invalid
with open(key_path('testkey_rsa.pub'), 'r') as keyfile:
pub_key = algo.prepare_key(keyfile.read())
result = algo.verify(message, pub_key, sig)
assert not result
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_ec_should_reject_non_string_key(self):
algo = ECAlgorithm(ECAlgorithm.SHA256)
with pytest.raises(TypeError):
algo.prepare_key(None)
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_ec_should_accept_unicode_key(self):
algo = ECAlgorithm(ECAlgorithm.SHA256)
with open(key_path('testkey_ec'), 'r') as ec_key:
algo.prepare_key(ensure_unicode(ec_key.read()))
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_ec_verify_should_return_false_if_signature_invalid(self):
algo = ECAlgorithm(ECAlgorithm.SHA256)
message = ensure_bytes('Hello World!')
# Mess up the signature by replacing a known byte
sig = base64.b64decode(ensure_bytes(
'AC+m4Jf/xI3guAC6w0w37t5zRpSCF6F4udEz5LiMiTIjCS4vcVe6dDOxK+M'
'mvkF8PxJuvqxP2CO3TR3okDPCl/NjATTO1jE+qBZ966CRQSSzcCM+tzcHzw'
'LZS5kbvKu0Acd/K6Ol2/W3B1NeV5F/gjvZn/jOwaLgWEUYsg0o4XVrAg65'.replace('r', 's')))
with open(key_path('testkey_ec.pub'), 'r') as keyfile:
pub_key = algo.prepare_key(keyfile.read())
result = algo.verify(message, pub_key, sig)
assert not result
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_ec_verify_should_return_false_if_signature_wrong_length(self):
algo = ECAlgorithm(ECAlgorithm.SHA256)
message = ensure_bytes('Hello World!')
sig = base64.b64decode(ensure_bytes('AC+m4Jf/xI3guAC6w0w3'))
with open(key_path('testkey_ec.pub'), 'r') as keyfile:
pub_key = algo.prepare_key(keyfile.read())
result = algo.verify(message, pub_key, sig)
assert not result
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsa_pss_sign_then_verify_should_return_true(self):
algo = RSAPSSAlgorithm(RSAPSSAlgorithm.SHA256)
message = ensure_bytes('Hello World!')
with open(key_path('testkey_rsa'), 'r') as keyfile:
priv_key = algo.prepare_key(keyfile.read())
sig = algo.sign(message, priv_key)
with open(key_path('testkey_rsa.pub'), 'r') as keyfile:
pub_key = algo.prepare_key(keyfile.read())
result = algo.verify(message, pub_key, sig)
assert result
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsa_pss_verify_should_return_false_if_signature_invalid(self):
algo = RSAPSSAlgorithm(RSAPSSAlgorithm.SHA256)
jwt_message = ensure_bytes('Hello World!')
jwt_sig = base64.b64decode(ensure_bytes(
'ywKAUGRIDC//6X+tjvZA96yEtMqpOrSppCNfYI7NKyon3P7doud5v65oWNu'
'vQsz0fzPGfF7mQFGo9Cm9Vn0nljm4G6PtqZRbz5fXNQBH9k10gq34AtM02c'
'/cveqACQ8gF3zxWh6qr9jVqIpeMEaEBIkvqG954E0HT9s9ybHShgHX9mlWk'
'186/LopP4xe5c/hxOQjwhv6yDlTiwJFiqjNCvj0GyBKsc4iECLGIIO+4mC4'
'daOCWqbpZDuLb1imKpmm8Nsm56kAxijMLZnpCcnPgyb7CqG+B93W9GHglA5'
'drUeR1gRtO7vqbZMsCAQ4bpjXxwbYyjQlEVuMl73UL6sOWg=='))
jwt_sig += ensure_bytes('123') # Signature is now invalid
with open(key_path('testkey_rsa.pub'), 'r') as keyfile:
jwt_pub_key = algo.prepare_key(keyfile.read())
result = algo.verify(jwt_message, jwt_pub_key, jwt_sig)
assert not result
class TestAlgorithmsRFC7520:
"""
These test vectors were taken from RFC 7520
(https://tools.ietf.org/html/rfc7520)
"""
def test_hmac_verify_should_return_true_for_test_vector(self):
"""
This test verifies that HMAC verification works with a known good
signature and key.
Reference: https://tools.ietf.org/html/rfc7520#section-4.4
"""
signing_input = ensure_bytes(
'eyJhbGciOiJIUzI1NiIsImtpZCI6IjAxOGMwYWU1LTRkOWItNDcxYi1iZmQ2LWVlZ'
'jMxNGJjNzAzNyJ9.SXTigJlzIGEgZGFuZ2Vyb3VzIGJ1c2luZXNzLCBGcm9kbywgZ'
'29pbmcgb3V0IHlvdXIgZG9vci4gWW91IHN0ZXAgb250byB0aGUgcm9hZCwgYW5kIG'
'lmIHlvdSBkb24ndCBrZWVwIHlvdXIgZmVldCwgdGhlcmXigJlzIG5vIGtub3dpbmc'
'gd2hlcmUgeW91IG1pZ2h0IGJlIHN3ZXB0IG9mZiB0by4'
)
signature = base64url_decode(ensure_bytes(
's0h6KThzkfBBBkLspW1h84VsJZFTsPPqMDA7g1Md7p0'
))
algo = HMACAlgorithm(HMACAlgorithm.SHA256)
key = algo.prepare_key(load_hmac_key())
result = algo.verify(signing_input, key, signature)
assert result
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsa_verify_should_return_true_for_test_vector(self):
"""
This test verifies that RSA PKCS v1.5 verification works with a known
good signature and key.
Reference: https://tools.ietf.org/html/rfc7520#section-4.1
"""
signing_input = ensure_bytes(
'eyJhbGciOiJSUzI1NiIsImtpZCI6ImJpbGJvLmJhZ2dpbnNAaG9iYml0b24uZXhhb'
'XBsZSJ9.SXTigJlzIGEgZGFuZ2Vyb3VzIGJ1c2luZXNzLCBGcm9kbywgZ29pbmcgb'
'3V0IHlvdXIgZG9vci4gWW91IHN0ZXAgb250byB0aGUgcm9hZCwgYW5kIGlmIHlvdS'
'Bkb24ndCBrZWVwIHlvdXIgZmVldCwgdGhlcmXigJlzIG5vIGtub3dpbmcgd2hlcmU'
'geW91IG1pZ2h0IGJlIHN3ZXB0IG9mZiB0by4'
)
signature = base64url_decode(ensure_bytes(
'MRjdkly7_-oTPTS3AXP41iQIGKa80A0ZmTuV5MEaHoxnW2e5CZ5NlKtainoFmKZop'
'dHM1O2U4mwzJdQx996ivp83xuglII7PNDi84wnB-BDkoBwA78185hX-Es4JIwmDLJ'
'K3lfWRa-XtL0RnltuYv746iYTh_qHRD68BNt1uSNCrUCTJDt5aAE6x8wW1Kt9eRo4'
'QPocSadnHXFxnt8Is9UzpERV0ePPQdLuW3IS_de3xyIrDaLGdjluPxUAhb6L2aXic'
'1U12podGU0KLUQSE_oI-ZnmKJ3F4uOZDnd6QZWJushZ41Axf_fcIe8u9ipH84ogor'
'ee7vjbU5y18kDquDg'
))
algo = RSAAlgorithm(RSAAlgorithm.SHA256)
key = algo.prepare_key(load_rsa_pub_key())
result = algo.verify(signing_input, key, signature)
assert result
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_rsapss_verify_should_return_true_for_test_vector(self):
"""
This test verifies that RSA-PSS verification works with a known good
signature and key.
Reference: https://tools.ietf.org/html/rfc7520#section-4.2
"""
signing_input = ensure_bytes(
'eyJhbGciOiJQUzM4NCIsImtpZCI6ImJpbGJvLmJhZ2dpbnNAaG9iYml0b24uZXhhb'
'XBsZSJ9.SXTigJlzIGEgZGFuZ2Vyb3VzIGJ1c2luZXNzLCBGcm9kbywgZ29pbmcgb'
'3V0IHlvdXIgZG9vci4gWW91IHN0ZXAgb250byB0aGUgcm9hZCwgYW5kIGlmIHlvdS'
'Bkb24ndCBrZWVwIHlvdXIgZmVldCwgdGhlcmXigJlzIG5vIGtub3dpbmcgd2hlcmU'
'geW91IG1pZ2h0IGJlIHN3ZXB0IG9mZiB0by4'
)
signature = base64url_decode(ensure_bytes(
'cu22eBqkYDKgIlTpzDXGvaFfz6WGoz7fUDcfT0kkOy42miAh2qyBzk1xEsnk2IpN6'
'-tPid6VrklHkqsGqDqHCdP6O8TTB5dDDItllVo6_1OLPpcbUrhiUSMxbbXUvdvWXz'
'g-UD8biiReQFlfz28zGWVsdiNAUf8ZnyPEgVFn442ZdNqiVJRmBqrYRXe8P_ijQ7p'
'8Vdz0TTrxUeT3lm8d9shnr2lfJT8ImUjvAA2Xez2Mlp8cBE5awDzT0qI0n6uiP1aC'
'N_2_jLAeQTlqRHtfa64QQSUmFAAjVKPbByi7xho0uTOcbH510a6GYmJUAfmWjwZ6o'
'D4ifKo8DYM-X72Eaw'
))
algo = RSAPSSAlgorithm(RSAPSSAlgorithm.SHA384)
key = algo.prepare_key(load_rsa_pub_key())
result = algo.verify(signing_input, key, signature)
assert result
@pytest.mark.skipif(not has_crypto, reason='Not supported without cryptography library')
def test_ec_verify_should_return_true_for_test_vector(self):
"""
This test verifies that ECDSA verification works with a known good
signature and key.
Reference: https://tools.ietf.org/html/rfc7520#section-4.3
"""
signing_input = ensure_bytes(
'eyJhbGciOiJFUzUxMiIsImtpZCI6ImJpbGJvLmJhZ2dpbnNAaG9iYml0b24uZXhhb'
'XBsZSJ9.SXTigJlzIGEgZGFuZ2Vyb3VzIGJ1c2luZXNzLCBGcm9kbywgZ29pbmcgb'
'3V0IHlvdXIgZG9vci4gWW91IHN0ZXAgb250byB0aGUgcm9hZCwgYW5kIGlmIHlvdS'
'Bkb24ndCBrZWVwIHlvdXIgZmVldCwgdGhlcmXigJlzIG5vIGtub3dpbmcgd2hlcmU'
'geW91IG1pZ2h0IGJlIHN3ZXB0IG9mZiB0by4'
)
signature = base64url_decode(ensure_bytes(
'AE_R_YZCChjn4791jSQCrdPZCNYqHXCTZH0-JZGYNlaAjP2kqaluUIIUnC9qvbu9P'
'lon7KRTzoNEuT4Va2cmL1eJAQy3mtPBu_u_sDDyYjnAMDxXPn7XrT0lw-kvAD890j'
'l8e2puQens_IEKBpHABlsbEPX6sFY8OcGDqoRuBomu9xQ2'
))
algo = ECAlgorithm(ECAlgorithm.SHA512)
key = algo.prepare_key(load_ec_pub_key())
result = algo.verify(signing_input, key, signature)
assert result
|
