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# Copyright 2014 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import base64
import datetime
import json
import os
import mock
import pytest # type: ignore
from google.auth import _helpers
from google.auth import crypt
from google.auth import exceptions
from google.auth import jwt
DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
with open(os.path.join(DATA_DIR, "privatekey.pem"), "rb") as fh:
PRIVATE_KEY_BYTES = fh.read()
with open(os.path.join(DATA_DIR, "public_cert.pem"), "rb") as fh:
PUBLIC_CERT_BYTES = fh.read()
with open(os.path.join(DATA_DIR, "other_cert.pem"), "rb") as fh:
OTHER_CERT_BYTES = fh.read()
with open(os.path.join(DATA_DIR, "es256_privatekey.pem"), "rb") as fh:
EC_PRIVATE_KEY_BYTES = fh.read()
with open(os.path.join(DATA_DIR, "es256_public_cert.pem"), "rb") as fh:
EC_PUBLIC_CERT_BYTES = fh.read()
SERVICE_ACCOUNT_JSON_FILE = os.path.join(DATA_DIR, "service_account.json")
with open(SERVICE_ACCOUNT_JSON_FILE, "rb") as fh:
SERVICE_ACCOUNT_INFO = json.load(fh)
@pytest.fixture
def signer():
return crypt.RSASigner.from_string(PRIVATE_KEY_BYTES, "1")
def test_encode_basic(signer):
test_payload = {"test": "value"}
encoded = jwt.encode(signer, test_payload)
header, payload, _, _ = jwt._unverified_decode(encoded)
assert payload == test_payload
assert header == {"typ": "JWT", "alg": "RS256", "kid": signer.key_id}
def test_encode_extra_headers(signer):
encoded = jwt.encode(signer, {}, header={"extra": "value"})
header = jwt.decode_header(encoded)
assert header == {
"typ": "JWT",
"alg": "RS256",
"kid": signer.key_id,
"extra": "value",
}
def test_encode_custom_alg_in_headers(signer):
encoded = jwt.encode(signer, {}, header={"alg": "foo"})
header = jwt.decode_header(encoded)
assert header == {"typ": "JWT", "alg": "foo", "kid": signer.key_id}
@pytest.fixture
def es256_signer():
return crypt.ES256Signer.from_string(EC_PRIVATE_KEY_BYTES, "1")
def test_encode_basic_es256(es256_signer):
test_payload = {"test": "value"}
encoded = jwt.encode(es256_signer, test_payload)
header, payload, _, _ = jwt._unverified_decode(encoded)
assert payload == test_payload
assert header == {"typ": "JWT", "alg": "ES256", "kid": es256_signer.key_id}
@pytest.fixture
def token_factory(signer, es256_signer):
def factory(claims=None, key_id=None, use_es256_signer=False):
now = _helpers.datetime_to_secs(_helpers.utcnow())
payload = {
"aud": "audience@example.com",
"iat": now,
"exp": now + 300,
"user": "billy bob",
"metadata": {"meta": "data"},
}
payload.update(claims or {})
# False is specified to remove the signer's key id for testing
# headers without key ids.
if key_id is False:
signer._key_id = None
key_id = None
if use_es256_signer:
return jwt.encode(es256_signer, payload, key_id=key_id)
else:
return jwt.encode(signer, payload, key_id=key_id)
return factory
def test_decode_valid(token_factory):
payload = jwt.decode(token_factory(), certs=PUBLIC_CERT_BYTES)
assert payload["aud"] == "audience@example.com"
assert payload["user"] == "billy bob"
assert payload["metadata"]["meta"] == "data"
def test_decode_header_object(token_factory):
payload = token_factory()
# Create a malformed JWT token with a number as a header instead of a
# dictionary (3 == base64d(M7==))
payload = b"M7." + b".".join(payload.split(b".")[1:])
with pytest.raises(ValueError) as excinfo:
jwt.decode(payload, certs=PUBLIC_CERT_BYTES)
assert excinfo.match(r"Header segment should be a JSON object: " + str(b"M7"))
def test_decode_payload_object(signer):
# Create a malformed JWT token with a payload containing both "iat" and
# "exp" strings, although not as fields of a dictionary
payload = jwt.encode(signer, "iatexp")
with pytest.raises(ValueError) as excinfo:
jwt.decode(payload, certs=PUBLIC_CERT_BYTES)
assert excinfo.match(
r"Payload segment should be a JSON object: " + str(b"ImlhdGV4cCI")
)
def test_decode_valid_es256(token_factory):
payload = jwt.decode(
token_factory(use_es256_signer=True), certs=EC_PUBLIC_CERT_BYTES
)
assert payload["aud"] == "audience@example.com"
assert payload["user"] == "billy bob"
assert payload["metadata"]["meta"] == "data"
def test_decode_valid_with_audience(token_factory):
payload = jwt.decode(
token_factory(), certs=PUBLIC_CERT_BYTES, audience="audience@example.com"
)
assert payload["aud"] == "audience@example.com"
assert payload["user"] == "billy bob"
assert payload["metadata"]["meta"] == "data"
def test_decode_valid_with_audience_list(token_factory):
payload = jwt.decode(
token_factory(),
certs=PUBLIC_CERT_BYTES,
audience=["audience@example.com", "another_audience@example.com"],
)
assert payload["aud"] == "audience@example.com"
assert payload["user"] == "billy bob"
assert payload["metadata"]["meta"] == "data"
def test_decode_valid_unverified(token_factory):
payload = jwt.decode(token_factory(), certs=OTHER_CERT_BYTES, verify=False)
assert payload["aud"] == "audience@example.com"
assert payload["user"] == "billy bob"
assert payload["metadata"]["meta"] == "data"
def test_decode_bad_token_wrong_number_of_segments():
with pytest.raises(ValueError) as excinfo:
jwt.decode("1.2", PUBLIC_CERT_BYTES)
assert excinfo.match(r"Wrong number of segments")
def test_decode_bad_token_not_base64():
with pytest.raises((ValueError, TypeError)) as excinfo:
jwt.decode("1.2.3", PUBLIC_CERT_BYTES)
assert excinfo.match(r"Incorrect padding|more than a multiple of 4")
def test_decode_bad_token_not_json():
token = b".".join([base64.urlsafe_b64encode(b"123!")] * 3)
with pytest.raises(ValueError) as excinfo:
jwt.decode(token, PUBLIC_CERT_BYTES)
assert excinfo.match(r"Can\'t parse segment")
def test_decode_bad_token_no_iat_or_exp(signer):
token = jwt.encode(signer, {"test": "value"})
with pytest.raises(ValueError) as excinfo:
jwt.decode(token, PUBLIC_CERT_BYTES)
assert excinfo.match(r"Token does not contain required claim")
def test_decode_bad_token_too_early(token_factory):
token = token_factory(
claims={
"iat": _helpers.datetime_to_secs(
_helpers.utcnow() + datetime.timedelta(hours=1)
)
}
)
with pytest.raises(ValueError) as excinfo:
jwt.decode(token, PUBLIC_CERT_BYTES, clock_skew_in_seconds=59)
assert excinfo.match(r"Token used too early")
def test_decode_bad_token_expired(token_factory):
token = token_factory(
claims={
"exp": _helpers.datetime_to_secs(
_helpers.utcnow() - datetime.timedelta(hours=1)
)
}
)
with pytest.raises(ValueError) as excinfo:
jwt.decode(token, PUBLIC_CERT_BYTES, clock_skew_in_seconds=59)
assert excinfo.match(r"Token expired")
def test_decode_success_with_no_clock_skew(token_factory):
token = token_factory(
claims={
"exp": _helpers.datetime_to_secs(
_helpers.utcnow() + datetime.timedelta(seconds=1)
),
"iat": _helpers.datetime_to_secs(
_helpers.utcnow() - datetime.timedelta(seconds=1)
),
}
)
jwt.decode(token, PUBLIC_CERT_BYTES)
def test_decode_success_with_custom_clock_skew(token_factory):
token = token_factory(
claims={
"exp": _helpers.datetime_to_secs(
_helpers.utcnow() + datetime.timedelta(seconds=2)
),
"iat": _helpers.datetime_to_secs(
_helpers.utcnow() - datetime.timedelta(seconds=2)
),
}
)
jwt.decode(token, PUBLIC_CERT_BYTES, clock_skew_in_seconds=1)
def test_decode_bad_token_wrong_audience(token_factory):
token = token_factory()
audience = "audience2@example.com"
with pytest.raises(ValueError) as excinfo:
jwt.decode(token, PUBLIC_CERT_BYTES, audience=audience)
assert excinfo.match(r"Token has wrong audience")
def test_decode_bad_token_wrong_audience_list(token_factory):
token = token_factory()
audience = ["audience2@example.com", "audience3@example.com"]
with pytest.raises(ValueError) as excinfo:
jwt.decode(token, PUBLIC_CERT_BYTES, audience=audience)
assert excinfo.match(r"Token has wrong audience")
def test_decode_wrong_cert(token_factory):
with pytest.raises(ValueError) as excinfo:
jwt.decode(token_factory(), OTHER_CERT_BYTES)
assert excinfo.match(r"Could not verify token signature")
def test_decode_multicert_bad_cert(token_factory):
certs = {"1": OTHER_CERT_BYTES, "2": PUBLIC_CERT_BYTES}
with pytest.raises(ValueError) as excinfo:
jwt.decode(token_factory(), certs)
assert excinfo.match(r"Could not verify token signature")
def test_decode_no_cert(token_factory):
certs = {"2": PUBLIC_CERT_BYTES}
with pytest.raises(ValueError) as excinfo:
jwt.decode(token_factory(), certs)
assert excinfo.match(r"Certificate for key id 1 not found")
def test_decode_no_key_id(token_factory):
token = token_factory(key_id=False)
certs = {"2": PUBLIC_CERT_BYTES}
payload = jwt.decode(token, certs)
assert payload["user"] == "billy bob"
def test_decode_unknown_alg():
headers = json.dumps({u"kid": u"1", u"alg": u"fakealg"})
token = b".".join(
map(lambda seg: base64.b64encode(seg.encode("utf-8")), [headers, u"{}", u"sig"])
)
with pytest.raises(ValueError) as excinfo:
jwt.decode(token)
assert excinfo.match(r"fakealg")
def test_decode_missing_crytography_alg(monkeypatch):
monkeypatch.delitem(jwt._ALGORITHM_TO_VERIFIER_CLASS, "ES256")
headers = json.dumps({u"kid": u"1", u"alg": u"ES256"})
token = b".".join(
map(lambda seg: base64.b64encode(seg.encode("utf-8")), [headers, u"{}", u"sig"])
)
with pytest.raises(ValueError) as excinfo:
jwt.decode(token)
assert excinfo.match(r"cryptography")
def test_roundtrip_explicit_key_id(token_factory):
token = token_factory(key_id="3")
certs = {"2": OTHER_CERT_BYTES, "3": PUBLIC_CERT_BYTES}
payload = jwt.decode(token, certs)
assert payload["user"] == "billy bob"
class TestCredentials(object):
SERVICE_ACCOUNT_EMAIL = "service-account@example.com"
SUBJECT = "subject"
AUDIENCE = "audience"
ADDITIONAL_CLAIMS = {"meta": "data"}
credentials = None
@pytest.fixture(autouse=True)
def credentials_fixture(self, signer):
self.credentials = jwt.Credentials(
signer,
self.SERVICE_ACCOUNT_EMAIL,
self.SERVICE_ACCOUNT_EMAIL,
self.AUDIENCE,
)
def test_from_service_account_info(self):
with open(SERVICE_ACCOUNT_JSON_FILE, "r") as fh:
info = json.load(fh)
credentials = jwt.Credentials.from_service_account_info(
info, audience=self.AUDIENCE
)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == info["client_email"]
assert credentials._audience == self.AUDIENCE
def test_from_service_account_info_args(self):
info = SERVICE_ACCOUNT_INFO.copy()
credentials = jwt.Credentials.from_service_account_info(
info,
subject=self.SUBJECT,
audience=self.AUDIENCE,
additional_claims=self.ADDITIONAL_CLAIMS,
)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == self.SUBJECT
assert credentials._audience == self.AUDIENCE
assert credentials._additional_claims == self.ADDITIONAL_CLAIMS
def test_from_service_account_file(self):
info = SERVICE_ACCOUNT_INFO.copy()
credentials = jwt.Credentials.from_service_account_file(
SERVICE_ACCOUNT_JSON_FILE, audience=self.AUDIENCE
)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == info["client_email"]
assert credentials._audience == self.AUDIENCE
def test_from_service_account_file_args(self):
info = SERVICE_ACCOUNT_INFO.copy()
credentials = jwt.Credentials.from_service_account_file(
SERVICE_ACCOUNT_JSON_FILE,
subject=self.SUBJECT,
audience=self.AUDIENCE,
additional_claims=self.ADDITIONAL_CLAIMS,
)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == self.SUBJECT
assert credentials._audience == self.AUDIENCE
assert credentials._additional_claims == self.ADDITIONAL_CLAIMS
def test_from_signing_credentials(self):
jwt_from_signing = self.credentials.from_signing_credentials(
self.credentials, audience=mock.sentinel.new_audience
)
jwt_from_info = jwt.Credentials.from_service_account_info(
SERVICE_ACCOUNT_INFO, audience=mock.sentinel.new_audience
)
assert isinstance(jwt_from_signing, jwt.Credentials)
assert jwt_from_signing._signer.key_id == jwt_from_info._signer.key_id
assert jwt_from_signing._issuer == jwt_from_info._issuer
assert jwt_from_signing._subject == jwt_from_info._subject
assert jwt_from_signing._audience == jwt_from_info._audience
def test_default_state(self):
assert not self.credentials.valid
# Expiration hasn't been set yet
assert not self.credentials.expired
def test_with_claims(self):
new_audience = "new_audience"
new_credentials = self.credentials.with_claims(audience=new_audience)
assert new_credentials._signer == self.credentials._signer
assert new_credentials._issuer == self.credentials._issuer
assert new_credentials._subject == self.credentials._subject
assert new_credentials._audience == new_audience
assert new_credentials._additional_claims == self.credentials._additional_claims
assert new_credentials._quota_project_id == self.credentials._quota_project_id
def test__make_jwt_without_audience(self):
cred = jwt.Credentials.from_service_account_info(
SERVICE_ACCOUNT_INFO.copy(),
subject=self.SUBJECT,
audience=None,
additional_claims={"scope": "foo bar"},
)
token, _ = cred._make_jwt()
payload = jwt.decode(token, PUBLIC_CERT_BYTES)
assert payload["scope"] == "foo bar"
assert "aud" not in payload
def test_with_quota_project(self):
quota_project_id = "project-foo"
new_credentials = self.credentials.with_quota_project(quota_project_id)
assert new_credentials._signer == self.credentials._signer
assert new_credentials._issuer == self.credentials._issuer
assert new_credentials._subject == self.credentials._subject
assert new_credentials._audience == self.credentials._audience
assert new_credentials._additional_claims == self.credentials._additional_claims
assert new_credentials.additional_claims == self.credentials._additional_claims
assert new_credentials._quota_project_id == quota_project_id
def test_sign_bytes(self):
to_sign = b"123"
signature = self.credentials.sign_bytes(to_sign)
assert crypt.verify_signature(to_sign, signature, PUBLIC_CERT_BYTES)
def test_signer(self):
assert isinstance(self.credentials.signer, crypt.RSASigner)
def test_signer_email(self):
assert self.credentials.signer_email == SERVICE_ACCOUNT_INFO["client_email"]
def _verify_token(self, token):
payload = jwt.decode(token, PUBLIC_CERT_BYTES)
assert payload["iss"] == self.SERVICE_ACCOUNT_EMAIL
return payload
def test_refresh(self):
self.credentials.refresh(None)
assert self.credentials.valid
assert not self.credentials.expired
def test_expired(self):
assert not self.credentials.expired
self.credentials.refresh(None)
assert not self.credentials.expired
with mock.patch("google.auth._helpers.utcnow") as now:
one_day = datetime.timedelta(days=1)
now.return_value = self.credentials.expiry + one_day
assert self.credentials.expired
def test_before_request(self):
headers = {}
self.credentials.refresh(None)
self.credentials.before_request(
None, "GET", "http://example.com?a=1#3", headers
)
header_value = headers["authorization"]
_, token = header_value.split(" ")
# Since the audience is set, it should use the existing token.
assert token.encode("utf-8") == self.credentials.token
payload = self._verify_token(token)
assert payload["aud"] == self.AUDIENCE
def test_before_request_refreshes(self):
assert not self.credentials.valid
self.credentials.before_request(None, "GET", "http://example.com?a=1#3", {})
assert self.credentials.valid
class TestOnDemandCredentials(object):
SERVICE_ACCOUNT_EMAIL = "service-account@example.com"
SUBJECT = "subject"
ADDITIONAL_CLAIMS = {"meta": "data"}
credentials = None
@pytest.fixture(autouse=True)
def credentials_fixture(self, signer):
self.credentials = jwt.OnDemandCredentials(
signer,
self.SERVICE_ACCOUNT_EMAIL,
self.SERVICE_ACCOUNT_EMAIL,
max_cache_size=2,
)
def test_from_service_account_info(self):
with open(SERVICE_ACCOUNT_JSON_FILE, "r") as fh:
info = json.load(fh)
credentials = jwt.OnDemandCredentials.from_service_account_info(info)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == info["client_email"]
def test_from_service_account_info_args(self):
info = SERVICE_ACCOUNT_INFO.copy()
credentials = jwt.OnDemandCredentials.from_service_account_info(
info, subject=self.SUBJECT, additional_claims=self.ADDITIONAL_CLAIMS
)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == self.SUBJECT
assert credentials._additional_claims == self.ADDITIONAL_CLAIMS
def test_from_service_account_file(self):
info = SERVICE_ACCOUNT_INFO.copy()
credentials = jwt.OnDemandCredentials.from_service_account_file(
SERVICE_ACCOUNT_JSON_FILE
)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == info["client_email"]
def test_from_service_account_file_args(self):
info = SERVICE_ACCOUNT_INFO.copy()
credentials = jwt.OnDemandCredentials.from_service_account_file(
SERVICE_ACCOUNT_JSON_FILE,
subject=self.SUBJECT,
additional_claims=self.ADDITIONAL_CLAIMS,
)
assert credentials._signer.key_id == info["private_key_id"]
assert credentials._issuer == info["client_email"]
assert credentials._subject == self.SUBJECT
assert credentials._additional_claims == self.ADDITIONAL_CLAIMS
def test_from_signing_credentials(self):
jwt_from_signing = self.credentials.from_signing_credentials(self.credentials)
jwt_from_info = jwt.OnDemandCredentials.from_service_account_info(
SERVICE_ACCOUNT_INFO
)
assert isinstance(jwt_from_signing, jwt.OnDemandCredentials)
assert jwt_from_signing._signer.key_id == jwt_from_info._signer.key_id
assert jwt_from_signing._issuer == jwt_from_info._issuer
assert jwt_from_signing._subject == jwt_from_info._subject
def test_default_state(self):
# Credentials are *always* valid.
assert self.credentials.valid
# Credentials *never* expire.
assert not self.credentials.expired
def test_with_claims(self):
new_claims = {"meep": "moop"}
new_credentials = self.credentials.with_claims(additional_claims=new_claims)
assert new_credentials._signer == self.credentials._signer
assert new_credentials._issuer == self.credentials._issuer
assert new_credentials._subject == self.credentials._subject
assert new_credentials._additional_claims == new_claims
def test_with_quota_project(self):
quota_project_id = "project-foo"
new_credentials = self.credentials.with_quota_project(quota_project_id)
assert new_credentials._signer == self.credentials._signer
assert new_credentials._issuer == self.credentials._issuer
assert new_credentials._subject == self.credentials._subject
assert new_credentials._additional_claims == self.credentials._additional_claims
assert new_credentials._quota_project_id == quota_project_id
def test_sign_bytes(self):
to_sign = b"123"
signature = self.credentials.sign_bytes(to_sign)
assert crypt.verify_signature(to_sign, signature, PUBLIC_CERT_BYTES)
def test_signer(self):
assert isinstance(self.credentials.signer, crypt.RSASigner)
def test_signer_email(self):
assert self.credentials.signer_email == SERVICE_ACCOUNT_INFO["client_email"]
def _verify_token(self, token):
payload = jwt.decode(token, PUBLIC_CERT_BYTES)
assert payload["iss"] == self.SERVICE_ACCOUNT_EMAIL
return payload
def test_refresh(self):
with pytest.raises(exceptions.RefreshError):
self.credentials.refresh(None)
def test_before_request(self):
headers = {}
self.credentials.before_request(
None, "GET", "http://example.com?a=1#3", headers
)
_, token = headers["authorization"].split(" ")
payload = self._verify_token(token)
assert payload["aud"] == "http://example.com"
# Making another request should re-use the same token.
self.credentials.before_request(None, "GET", "http://example.com?b=2", headers)
_, new_token = headers["authorization"].split(" ")
assert new_token == token
def test_expired_token(self):
self.credentials._cache["audience"] = (
mock.sentinel.token,
datetime.datetime.min,
)
token = self.credentials._get_jwt_for_audience("audience")
assert token != mock.sentinel.token
|