def test_policy_check_actions_expect_implicit_denied_action():
checker = PolicyChecker(
AwsClientStub(get_json_fixture_as_string('iamapi/s3-resource/resp.ec2.CreateInstance.implicitDeny.json'))
)
deny_s3_putobject_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3.PutObject.deny.json')
checker.append_policy('iamapi/policy.s3.PutObject.deny.json', deny_s3_putobject_policy)
result = checker.check_actions(['ec2:CreateInstance'])
assert len(result.denied_actions_all()) == 1, 'there is 1 denied action'
assert len(result.allowed_actions()) == 0, 'there should be no allowed action'
denied_action: JudgedAction = result.denied_actions_all()[0]
assert denied_action.denial_type == 'implicit', 'the denial should be an implicit one'
def test_policy_check_actions_expect_no_allowed_actions():
checker = PolicyChecker(
AwsClientStub(get_json_fixture_as_string('iamapi/s3-resource/resp.s3.PutObject.explicitDeny.json'))
)
allow_s3_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3-star.allow.json')
deny_s3_putobject_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3.PutObject.deny.json')
checker.append_policy('iamapi/policy.s3-star.allow.json', allow_s3_policy)
checker.append_policy('iamapi/policy.s3.PutObject.deny.json', deny_s3_putobject_policy)
result = checker.check_actions(['s3:PutObject'])
assert len(result.allowed_actions()) == 0, 'there is no allowed actions'
def test_policy_check_actions_expect_no_denied_actions():
checker = PolicyChecker(
AwsClientStub(get_json_fixture_as_string('iamapi/s3-resource/resp.s3.GetObject.allowed.json'))
)
deny_putobject_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3.PutObject.deny.json')
allow_s3_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3-star.allow.json')
checker.append_policy('iamapi/policy.s3.PutObject.deny.json', deny_putobject_policy)
checker.append_policy('iamapi/policy.s3-star.allow.json', allow_s3_policy)
result = checker.check_actions(['s3:GetObject'])
assert isinstance(result, CheckResponse), 'result was not an instance of CheckResponse'
assert len(result.denied_actions_all()) == 0, 'there are no denied actions'
def test_policy_check_actions_expect_allowed_action():
checker = PolicyChecker(
AwsClientStub(get_json_fixture_as_string('iamapi/s3-resource/resp.s3.GetObject.allowed.json'))
)
deny_putobject_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3.PutObject.deny.json')
allow_s3_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3-star.allow.json')
checker.append_policy('iamapi/policy.s3.PutObject.deny.json', deny_putobject_policy)
checker.append_policy('iamapi/policy.s3-star.allow.json', allow_s3_policy)
result = checker.check_actions(['s3:GetObject'])
assert len(result.allowed_actions()) == 1, 'there is 1 allowed action'
action: JudgedAction = result.allowed_actions()[0]
assert action.action_name == 's3:GetObject', 'the allowed action is "s3:GetObject"'
def test_policy_check_actions_retrieve_judging_stmt_for_explicit_denied_action():
checker = PolicyChecker(
AwsClientStub(get_json_fixture_as_string('iamapi/s3-resource/resp.s3.PutObject.explicitDeny.json'))
)
allow_s3_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3-star.allow.json')
deny_s3_putobject_policy = get_json_fixture_as_string('iamapi/s3-resource/policy.s3.PutObject.deny.json')
checker.append_policy('iamapi/policy.s3-star.allow.json', allow_s3_policy)
checker.append_policy('iamapi/policy.s3.PutObject.deny.json', deny_s3_putobject_policy)
result = checker.check_actions(['s3:PutObject'])
denied_action: JudgedAction = result.denied_actions_all()[0]
expected_statement = json.loads("""
{
"Sid": "DenyList",
"Effect": "Deny",
"Resource": "*",
"Action": [
"s3:Put*"
]
}""")
assert len(denied_action.get_decider_statements()) == 1, 'we expect 1 decider policy'
deciding_policy = denied_action.get_decider_statements()[0]['text']
assert deciding_policy == json.dumps(expected_statement)
def test_no_exception_on_valid_json():
checker = PolicyChecker(AwsClientStub(''))
checker.append_policy('policy_label', '{"valid":"JSON"}')
# no exception, so...
assert True
def test_exception_on_invalid_json():
checker = PolicyChecker(AwsClientStub(''))
with pytest.raises(json.decoder.JSONDecodeError):
checker.append_policy('policy_label', '--invalid JSON--')