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import os
from datetime import datetime, timedelta, timezone
import pytest
from pyhanko_certvalidator import ValidationContext
from pyhanko_certvalidator.errors import PathValidationError, RevokedError
from pyhanko_certvalidator.policy_decl import (
CertRevTrustPolicy,
FreshnessReqType,
RevocationCheckingPolicy,
)
from pyhanko_certvalidator.validate import async_validate_path
from .common import load_cert_object, load_crl, load_ocsp_response
freshness_dir = 'freshness'
certs = os.path.join('freshness', 'certs')
@pytest.mark.asyncio
async def test_cooldown_period_ok():
req_policy = RevocationCheckingPolicy.from_legacy('require')
policy = CertRevTrustPolicy(
revocation_checking_policy=req_policy,
freshness=timedelta(days=3),
freshness_req_type=FreshnessReqType.TIME_AFTER_SIGNATURE,
)
root = load_cert_object(certs, 'root.crt')
alice = load_cert_object(certs, 'alice.crt')
interm = load_cert_object(certs, 'interm.crt')
alice_ocsp = load_ocsp_response(freshness_dir, 'alice-2020-10-01.ors')
root_crl = load_crl(freshness_dir, 'root-2020-10-01.crl')
vc = ValidationContext(
trust_roots=[root],
other_certs=[interm],
ocsps=[alice_ocsp],
crls=[root_crl],
revinfo_policy=policy,
moment=datetime(2020, 10, 1, tzinfo=timezone.utc),
best_signature_time=datetime(2020, 9, 18, tzinfo=timezone.utc),
)
(path,) = await vc.path_builder.async_build_paths(alice)
await async_validate_path(vc, path)
@pytest.mark.asyncio
async def test_cooldown_period_too_early():
req_policy = RevocationCheckingPolicy.from_legacy('require')
policy = CertRevTrustPolicy(
revocation_checking_policy=req_policy,
freshness=timedelta(days=3),
freshness_req_type=FreshnessReqType.TIME_AFTER_SIGNATURE,
)
root = load_cert_object(certs, 'root.crt')
alice = load_cert_object(certs, 'alice.crt')
interm = load_cert_object(certs, 'interm.crt')
alice_ocsp = load_ocsp_response(freshness_dir, 'alice-2020-10-01.ors')
root_crl = load_crl(freshness_dir, 'root-2020-10-01.crl')
vc = ValidationContext(
trust_roots=[root],
other_certs=[interm],
ocsps=[alice_ocsp],
crls=[root_crl],
revinfo_policy=policy,
moment=datetime(2020, 10, 1, tzinfo=timezone.utc),
best_signature_time=datetime(2020, 9, 30, tzinfo=timezone.utc),
)
(path,) = await vc.path_builder.async_build_paths(alice)
with pytest.raises(PathValidationError, match='CRL.*recent enough'):
await async_validate_path(vc, path)
@pytest.mark.asyncio
async def test_use_delta_ok():
req_policy = RevocationCheckingPolicy.from_legacy('require')
policy = CertRevTrustPolicy(
revocation_checking_policy=req_policy,
freshness=timedelta(days=9),
freshness_req_type=FreshnessReqType.MAX_DIFF_REVOCATION_VALIDATION,
)
root = load_cert_object(certs, 'root.crt')
alice = load_cert_object(certs, 'alice.crt')
interm = load_cert_object(certs, 'interm.crt')
alice_ocsp = load_ocsp_response(freshness_dir, 'alice-2020-10-01.ors')
root_crl = load_crl(freshness_dir, 'root-2020-10-01.crl')
vc = ValidationContext(
trust_roots=[root],
other_certs=[interm],
ocsps=[alice_ocsp],
crls=[root_crl],
revinfo_policy=policy,
moment=datetime(2020, 10, 1, tzinfo=timezone.utc),
)
(path,) = await vc.path_builder.async_build_paths(alice)
await async_validate_path(vc, path)
@pytest.mark.asyncio
async def test_use_delta_stale():
req_policy = RevocationCheckingPolicy.from_legacy('require')
policy = CertRevTrustPolicy(
revocation_checking_policy=req_policy,
freshness=timedelta(hours=1),
freshness_req_type=FreshnessReqType.MAX_DIFF_REVOCATION_VALIDATION,
)
root = load_cert_object(certs, 'root.crt')
alice = load_cert_object(certs, 'alice.crt')
interm = load_cert_object(certs, 'interm.crt')
alice_ocsp = load_ocsp_response(freshness_dir, 'alice-2020-10-01.ors')
root_crl = load_crl(freshness_dir, 'root-2020-10-01.crl')
vc = ValidationContext(
trust_roots=[root],
other_certs=[interm],
ocsps=[alice_ocsp],
crls=[root_crl],
revinfo_policy=policy,
moment=datetime(2020, 10, 1, tzinfo=timezone.utc),
)
(path,) = await vc.path_builder.async_build_paths(alice)
with pytest.raises(PathValidationError, match='CRL.*recent enough'):
await async_validate_path(vc, path)
@pytest.mark.asyncio
async def test_use_most_recent():
req_policy = RevocationCheckingPolicy.from_legacy('require')
policy = CertRevTrustPolicy(
revocation_checking_policy=req_policy,
freshness=timedelta(days=20), # some ridiculous value
freshness_req_type=FreshnessReqType.MAX_DIFF_REVOCATION_VALIDATION,
)
root = load_cert_object(certs, 'root.crt')
alice = load_cert_object(certs, 'alice.crt')
interm = load_cert_object(certs, 'interm.crt')
alice_ocsp_older = load_ocsp_response(freshness_dir, 'alice-2020-11-29.ors')
alice_ocsp_recent = load_ocsp_response(
freshness_dir, 'alice-2020-12-10.ors'
)
root_crl = load_crl(freshness_dir, 'root-2020-12-10.crl')
vc = ValidationContext(
trust_roots=[root],
other_certs=[interm],
ocsps=[alice_ocsp_older, alice_ocsp_recent],
crls=[root_crl],
revinfo_policy=policy,
moment=datetime(2020, 12, 10, tzinfo=timezone.utc),
)
(path,) = await vc.path_builder.async_build_paths(alice)
with pytest.raises(RevokedError):
await async_validate_path(vc, path)
# Double-check: the validator should be fooled if we don't include the
# second OCSP response because of the very lenient time delta allowed
vc = ValidationContext(
trust_roots=[root],
other_certs=[interm],
ocsps=[alice_ocsp_older],
crls=[root_crl],
revinfo_policy=policy,
moment=datetime(2020, 12, 10, tzinfo=timezone.utc),
)
(path,) = await vc.path_builder.async_build_paths(alice)
await async_validate_path(vc, path)
@pytest.mark.asyncio
async def test_discard_post_validation_time():
req_policy = RevocationCheckingPolicy.from_legacy('require')
policy = CertRevTrustPolicy(
revocation_checking_policy=req_policy,
freshness=timedelta(days=20), # some ridiculous value
freshness_req_type=FreshnessReqType.MAX_DIFF_REVOCATION_VALIDATION,
)
root = load_cert_object(certs, 'root.crt')
alice = load_cert_object(certs, 'alice.crt')
interm = load_cert_object(certs, 'interm.crt')
alice_ocsp_older = load_ocsp_response(freshness_dir, 'alice-2020-11-29.ors')
alice_ocsp_recent = load_ocsp_response(
freshness_dir, 'alice-2020-12-10.ors'
)
root_crl = load_crl(freshness_dir, 'root-2020-11-29.crl')
vc = ValidationContext(
trust_roots=[root],
other_certs=[interm],
ocsps=[alice_ocsp_older, alice_ocsp_recent],
crls=[root_crl],
revinfo_policy=policy,
moment=datetime(2020, 11, 29, tzinfo=timezone.utc),
)
(path,) = await vc.path_builder.async_build_paths(alice)
await async_validate_path(vc, path)
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