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import ipaddress
import pytest
from cryptography.hazmat.backends import default_backend
from cryptography.x509 import load_pem_x509_certificate
from service_identity.cryptography import (
extract_ids,
extract_patterns,
verify_certificate_hostname,
verify_certificate_ip_address,
)
from service_identity.exceptions import (
CertificateError,
DNSMismatch,
IPAddressMismatch,
VerificationError,
)
from service_identity.hazmat import (
DNS_ID,
DNSPattern,
IPAddress_ID,
IPAddressPattern,
URIPattern,
)
from .certificates import (
PEM_CN_ONLY,
PEM_DNS_ONLY,
PEM_EVERYTHING,
PEM_OTHER_NAME,
)
backend = default_backend()
X509_DNS_ONLY = load_pem_x509_certificate(PEM_DNS_ONLY, backend)
X509_CN_ONLY = load_pem_x509_certificate(PEM_CN_ONLY, backend)
X509_OTHER_NAME = load_pem_x509_certificate(PEM_OTHER_NAME, backend)
CERT_EVERYTHING = load_pem_x509_certificate(PEM_EVERYTHING, backend)
class TestPublicAPI:
def test_no_cert_patterns_hostname(self):
"""
A certificate without subjectAltNames raises a helpful
CertificateError.
"""
with pytest.raises(
CertificateError,
match="Certificate does not contain any `subjectAltName`s.",
):
verify_certificate_hostname(X509_CN_ONLY, "example.com")
@pytest.mark.parametrize("ip", ["203.0.113.0", "2001:db8::"])
def test_no_cert_patterns_ip_address(self, ip):
"""
A certificate without subjectAltNames raises a helpful
CertificateError.
"""
with pytest.raises(
CertificateError,
match="Certificate does not contain any `subjectAltName`s.",
):
verify_certificate_ip_address(X509_CN_ONLY, ip)
def test_certificate_verify_hostname_ok(self):
"""
verify_certificate_hostname succeeds if the hostnames match.
"""
verify_certificate_hostname(X509_DNS_ONLY, "twistedmatrix.com")
def test_certificate_verify_hostname_fail(self):
"""
verify_certificate_hostname fails if the hostnames don't match and
provides the user with helpful information.
"""
with pytest.raises(VerificationError) as ei:
verify_certificate_hostname(X509_DNS_ONLY, "google.com")
assert [
DNSMismatch(mismatched_id=DNS_ID("google.com"))
] == ei.value.errors
@pytest.mark.parametrize("ip", ["1.1.1.1", "::1"])
def test_verify_certificate_ip_address_ok(self, ip):
"""
verify_certificate_ip_address succeeds if the addresses match. Works
both with IPv4 and IPv6.
"""
verify_certificate_ip_address(CERT_EVERYTHING, ip)
@pytest.mark.parametrize("ip", ["1.1.1.2", "::2"])
def test_verify_ip_address_fail(self, ip):
"""
verify_ip_address fails if the addresses don't match and provides the
user with helpful information. Works both with IPv4 and IPv6.
"""
with pytest.raises(VerificationError) as ei:
verify_certificate_ip_address(CERT_EVERYTHING, ip)
assert [
IPAddressMismatch(mismatched_id=IPAddress_ID(ip))
] == ei.value.errors
class TestExtractPatterns:
def test_dns(self):
"""
Returns the correct DNSPattern from a certificate.
"""
rv = extract_patterns(X509_DNS_ONLY)
assert [
DNSPattern.from_bytes(b"www.twistedmatrix.com"),
DNSPattern.from_bytes(b"twistedmatrix.com"),
] == rv
def test_cn_ids_are_ignored(self):
"""
commonName is not supported anymore and therefore ignored.
"""
assert [] == extract_patterns(X509_CN_ONLY)
def test_uri(self):
"""
Returns the correct URIPattern from a certificate.
"""
rv = extract_patterns(X509_OTHER_NAME)
assert [URIPattern.from_bytes(b"http://example.com/")] == [
id for id in rv if isinstance(id, URIPattern)
]
def test_ip(self):
"""
Returns IP patterns.
"""
rv = extract_patterns(CERT_EVERYTHING)
assert [
DNSPattern.from_bytes(pattern=b"service.identity.invalid"),
DNSPattern.from_bytes(
pattern=b"*.wildcard.service.identity.invalid"
),
DNSPattern.from_bytes(pattern=b"service.identity.invalid"),
DNSPattern.from_bytes(pattern=b"single.service.identity.invalid"),
IPAddressPattern(pattern=ipaddress.IPv4Address("1.1.1.1")),
IPAddressPattern(pattern=ipaddress.IPv6Address("::1")),
IPAddressPattern(pattern=ipaddress.IPv4Address("2.2.2.2")),
IPAddressPattern(pattern=ipaddress.IPv6Address("2a00:1c38::53")),
] == rv
def test_extract_ids_deprecated(self):
"""
`extract_ids` raises a DeprecationWarning with correct stacklevel.
"""
with pytest.deprecated_call() as wr:
extract_ids(CERT_EVERYTHING)
w = wr.pop()
assert (
"`extract_ids()` is deprecated, please use `extract_patterns()`."
== w.message.args[0]
)
assert __file__ == w.filename
|
