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import os
import pytest
from asn1crypto import x509
from pyhanko_certvalidator.authority import (
CertTrustAnchor,
NamedKeyAuthority,
TrustAnchor,
TrustQualifiers,
)
from pyhanko_certvalidator.context import ValidationContext
from pyhanko_certvalidator.errors import PathValidationError
from pyhanko_certvalidator.name_trees import (
GeneralNameType,
x509_names_to_subtrees,
)
from pyhanko_certvalidator.path import ValidationPath
from pyhanko_certvalidator.policy_decl import PKIXValidationParams
from pyhanko_certvalidator.validate import async_validate_path
from tests.common import load_nist_cert
def test_extract_policy():
# I know this isn't a CA cert, but it's a convenient one to use
crt = load_nist_cert('ValidCertificatePathTest1EE.crt')
anchor = CertTrustAnchor(crt, derive_default_quals_from_cert=True)
params = anchor.trust_qualifiers.standard_parameters
nist_test_policy = '2.16.840.1.101.3.2.1.48.1'
assert params.user_initial_policy_set == {nist_test_policy}
def test_extract_permitted_subtrees():
crt = load_nist_cert('nameConstraintsDN1CACert.crt')
anchor = CertTrustAnchor(crt, derive_default_quals_from_cert=True)
params = anchor.trust_qualifiers.standard_parameters
dirname_trs = params.initial_permitted_subtrees[
GeneralNameType.DIRECTORY_NAME
]
assert len(dirname_trs) == 1
(tree,) = dirname_trs
expected_name = x509.Name.build(
{
'organizational_unit_name': 'permittedSubtree1',
'organization_name': 'Test Certificates 2011',
'country_name': 'US',
}
)
assert tree.tree_base.value == expected_name
@pytest.mark.asyncio
async def test_validate_with_derived():
crt = load_nist_cert('nameConstraintsDN1CACert.crt')
anchor = CertTrustAnchor(crt, derive_default_quals_from_cert=True)
ee = load_nist_cert('InvalidDNnameConstraintsTest2EE.crt')
context = ValidationContext(
trust_roots=[anchor],
revocation_mode='soft-fail',
)
(path,) = await context.path_builder.async_build_paths(ee)
assert path.pkix_len == 1
with pytest.raises(PathValidationError, match='not all names.*permitted'):
await async_validate_path(context, path)
@pytest.mark.asyncio
async def test_validate_with_merged_permitted_subtrees():
crt = load_nist_cert('nameConstraintsDN1CACert.crt')
anchor = CertTrustAnchor(crt, derive_default_quals_from_cert=True)
ee = load_nist_cert('ValidDNnameConstraintsTest1EE.crt')
context = ValidationContext(
trust_roots=[anchor],
revocation_mode='soft-fail',
)
(path,) = await context.path_builder.async_build_paths(ee)
assert path.pkix_len == 1
# this should be OK
await async_validate_path(context, path)
# merge in an extra name constraint
extra_name = x509.Name.build(
{
'organizational_unit_name': 'someNameYouDontHave',
'organization_name': 'Test Certificates 2011',
'country_name': 'US',
}
)
extra_params = PKIXValidationParams(
initial_permitted_subtrees=x509_names_to_subtrees([extra_name])
)
with pytest.raises(PathValidationError, match='not all names.*permitted'):
await async_validate_path(context, path, parameters=extra_params)
@pytest.mark.asyncio
async def test_validate_with_merged_excluded_subtrees():
crt = load_nist_cert('nameConstraintsDN3CACert.crt')
anchor = CertTrustAnchor(crt, derive_default_quals_from_cert=True)
ee = load_nist_cert('ValidDNnameConstraintsTest6EE.crt')
context = ValidationContext(
trust_roots=[anchor],
revocation_mode='soft-fail',
)
(path,) = await context.path_builder.async_build_paths(ee)
assert path.pkix_len == 1
# this should be OK
await async_validate_path(context, path)
# merge in an extra name constraint
extra_name = x509.Name.build(
{
'organizational_unit_name': 'permittedSubtree1',
'organization_name': 'Test Certificates 2011',
'country_name': 'US',
}
)
extra_params = PKIXValidationParams(
initial_excluded_subtrees=x509_names_to_subtrees([extra_name])
)
with pytest.raises(PathValidationError, match='some names.*excluded'):
await async_validate_path(context, path, parameters=extra_params)
@pytest.mark.asyncio
async def test_validate_with_certless_root():
crt = load_nist_cert('nameConstraintsDN1CACert.crt')
# manually build params
permitted = x509.Name.build(
{
'organizational_unit_name': 'permittedSubtree1',
'organization_name': 'Test Certificates 2011',
'country_name': 'US',
}
)
extra_params = PKIXValidationParams(
initial_permitted_subtrees=x509_names_to_subtrees([permitted])
)
anchor = TrustAnchor(
NamedKeyAuthority(crt.subject, crt.public_key),
quals=TrustQualifiers(standard_parameters=extra_params),
)
ee = load_nist_cert('ValidDNnameConstraintsTest1EE.crt')
context = ValidationContext(
trust_roots=[anchor],
revocation_mode='soft-fail',
)
(path,) = await context.path_builder.async_build_paths(ee)
assert path.pkix_len == 1
assert isinstance(path.first, x509.Certificate)
assert path.trust_anchor is anchor
await async_validate_path(context, path, parameters=extra_params)
@pytest.mark.asyncio
async def test_validate_with_certless_root_failure():
crt = load_nist_cert('nameConstraintsDN1CACert.crt')
# manually build params
permitted = x509.Name.build(
{
'organizational_unit_name': 'someNameYouDontHave',
'organization_name': 'Test Certificates 2011',
'country_name': 'US',
}
)
extra_params = PKIXValidationParams(
initial_permitted_subtrees=x509_names_to_subtrees([permitted])
)
anchor = TrustAnchor(
NamedKeyAuthority(crt.subject, crt.public_key),
quals=TrustQualifiers(standard_parameters=extra_params),
)
ee = load_nist_cert('ValidDNnameConstraintsTest1EE.crt')
context = ValidationContext(
trust_roots=[anchor],
revocation_mode='soft-fail',
)
(path,) = await context.path_builder.async_build_paths(ee)
assert path.pkix_len == 1
assert isinstance(path.first, x509.Certificate)
assert path.trust_anchor is anchor
with pytest.raises(PathValidationError, match='not all names.*permitted'):
await async_validate_path(context, path, parameters=extra_params)
@pytest.mark.asyncio
async def test_validate_empty_path_certless_root():
crt = load_nist_cert('nameConstraintsDN1CACert.crt')
anchor = TrustAnchor(
NamedKeyAuthority(crt.subject, crt.public_key),
)
context = ValidationContext(
trust_roots=[anchor],
revocation_mode='soft-fail',
)
trivial_path = ValidationPath(trust_anchor=anchor, interm=[], leaf=None)
await async_validate_path(context, trivial_path)
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