mirror of
https://github.com/ansible-collections/community.crypto.git
synced 2026-03-26 21:33:25 +00:00
1135 lines
39 KiB
Python
1135 lines
39 KiB
Python
# Copyright (c) 2019, Felix Fontein <felix@fontein.de>
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# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
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# SPDX-License-Identifier: GPL-3.0-or-later
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# Note that this module util is **PRIVATE** to the collection. It can have breaking changes at any time.
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# Do not use this from other collections or standalone plugins/modules!
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from __future__ import annotations
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import base64
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import binascii
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import ipaddress
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import re
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import traceback
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import typing as t
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from urllib.parse import (
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ParseResult,
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urlparse,
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urlunparse,
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)
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from ansible.module_utils.common.text.converters import to_bytes, to_text
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from ansible_collections.community.crypto.plugins.module_utils._crypto._asn1 import (
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serialize_asn1_string_as_der,
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)
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from ansible_collections.community.crypto.plugins.module_utils._version import (
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LooseVersion,
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)
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try:
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import cryptography
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from cryptography import x509
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from cryptography.exceptions import InvalidSignature
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from cryptography.hazmat.primitives import serialization
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from cryptography.hazmat.primitives.asymmetric import padding
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from cryptography.hazmat.primitives.serialization.pkcs12 import (
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load_key_and_certificates as _load_key_and_certificates,
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)
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_HAS_CRYPTOGRAPHY = True
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except ImportError:
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# Error handled in the calling module.
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_HAS_CRYPTOGRAPHY = False
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try:
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import cryptography.hazmat.primitives.asymmetric.dh
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import cryptography.hazmat.primitives.asymmetric.ed448
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import cryptography.hazmat.primitives.asymmetric.ed25519
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import cryptography.hazmat.primitives.asymmetric.rsa
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import cryptography.hazmat.primitives.asymmetric.x448
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import cryptography.hazmat.primitives.asymmetric.x25519
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except ImportError:
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pass
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try:
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# This is a separate try/except since this is only present in cryptography 36.0.0 or newer
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from cryptography.hazmat.primitives.serialization.pkcs12 import (
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load_pkcs12 as _load_pkcs12,
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)
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except ImportError:
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# Error handled in the calling module.
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_load_pkcs12 = None # type: ignore
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try:
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import idna
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HAS_IDNA = True
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except ImportError:
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HAS_IDNA = False
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IDNA_IMP_ERROR = traceback.format_exc()
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from ansible.module_utils.basic import missing_required_lib
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from ansible_collections.community.crypto.plugins.module_utils._crypto._obj2txt import (
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obj2txt,
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)
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from ansible_collections.community.crypto.plugins.module_utils._crypto._objects import (
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NORMALIZE_NAMES,
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NORMALIZE_NAMES_SHORT,
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OID_LOOKUP,
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OID_MAP,
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)
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from ansible_collections.community.crypto.plugins.module_utils._crypto.basic import (
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OpenSSLObjectError,
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)
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if t.TYPE_CHECKING:
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import datetime
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.asymmetric.dh import DHPrivateKey, DHPublicKey
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from cryptography.hazmat.primitives.asymmetric.dsa import (
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DSAPrivateKey,
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DSAPublicKey,
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)
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from cryptography.hazmat.primitives.asymmetric.ec import (
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EllipticCurvePrivateKey,
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EllipticCurvePublicKey,
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)
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from cryptography.hazmat.primitives.asymmetric.rsa import (
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RSAPrivateKey,
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RSAPublicKey,
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)
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from cryptography.hazmat.primitives.asymmetric.types import (
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CertificateIssuerPrivateKeyTypes,
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CertificateIssuerPublicKeyTypes,
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CertificatePublicKeyTypes,
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PrivateKeyTypes,
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PublicKeyTypes,
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)
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from cryptography.hazmat.primitives.serialization.pkcs12 import (
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PKCS12KeyAndCertificates,
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)
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CertificatePrivateKeyTypes = t.Union[
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CertificateIssuerPrivateKeyTypes,
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cryptography.hazmat.primitives.asymmetric.x25519.X25519PrivateKey,
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cryptography.hazmat.primitives.asymmetric.x448.X448PrivateKey,
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]
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PublicKeyTypesWOEdwards = t.Union[ # pylint: disable=invalid-name
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DHPublicKey, DSAPublicKey, EllipticCurvePublicKey, RSAPublicKey
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]
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PrivateKeyTypesWOEdwards = t.Union[ # pylint: disable=invalid-name
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DHPrivateKey, DSAPrivateKey, EllipticCurvePrivateKey, RSAPrivateKey
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]
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else:
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PublicKeyTypesWOEdwards = None # pylint: disable=invalid-name
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PrivateKeyTypesWOEdwards = None # pylint: disable=invalid-name
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CRYPTOGRAPHY_TIMEZONE = False
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_CRYPTOGRAPHY_36_0_OR_NEWER = False
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if _HAS_CRYPTOGRAPHY:
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CRYPTOGRAPHY_TIMEZONE = LooseVersion(cryptography.__version__) >= LooseVersion(
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"42.0.0"
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)
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_CRYPTOGRAPHY_36_0_OR_NEWER = LooseVersion(
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cryptography.__version__
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) >= LooseVersion("36.0")
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DOTTED_OID = re.compile(r"^\d+(?:\.\d+)+$")
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def cryptography_get_extensions_from_cert(
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cert: x509.Certificate,
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) -> dict[str, dict[str, bool | str]]:
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result = {}
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if _CRYPTOGRAPHY_36_0_OR_NEWER:
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for ext in cert.extensions:
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result[ext.oid.dotted_string] = {
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"critical": ext.critical,
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"value": base64.b64encode(ext.value.public_bytes()).decode("ascii"),
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}
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else:
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# Since cryptography will not give us the DER value for an extension
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# (that is only stored for unrecognized extensions), we have to re-do
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# the extension parsing ourselves.
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from cryptography.hazmat.backends import default_backend
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backend = default_backend()
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# We access a *lot* of internal APIs here, so let's disable that message...
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# pylint: disable=protected-access
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x509_obj = cert._x509 # type: ignore
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# With cryptography 35.0.0, we can no longer use obj2txt. Unfortunately it still does
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# not allow to get the raw value of an extension, so we have to use this ugly hack:
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exts = list(cert.extensions)
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for i in range(backend._lib.X509_get_ext_count(x509_obj)):
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ext = backend._lib.X509_get_ext(x509_obj, i)
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if ext == backend._ffi.NULL:
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continue
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crit = backend._lib.X509_EXTENSION_get_critical(ext)
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data = backend._lib.X509_EXTENSION_get_data(ext)
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backend.openssl_assert(data != backend._ffi.NULL)
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der = backend._ffi.buffer(data.data, data.length)[:]
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entry = {
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"critical": (crit == 1),
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"value": base64.b64encode(der).decode("ascii"),
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}
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try:
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oid = obj2txt(
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backend._lib,
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backend._ffi,
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backend._lib.X509_EXTENSION_get_object(ext),
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)
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except AttributeError:
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oid = exts[i].oid.dotted_string
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result[oid] = entry
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return result
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def cryptography_get_extensions_from_csr(
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csr: x509.CertificateSigningRequest,
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) -> dict[str, dict[str, bool | str]]:
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result = {}
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if _CRYPTOGRAPHY_36_0_OR_NEWER:
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for ext in csr.extensions:
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result[ext.oid.dotted_string] = {
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"critical": ext.critical,
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"value": base64.b64encode(ext.value.public_bytes()).decode("ascii"),
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}
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else:
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# Since cryptography will not give us the DER value for an extension
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# (that is only stored for unrecognized extensions), we have to re-do
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# the extension parsing ourselves.
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from cryptography.hazmat.backends import default_backend
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backend = default_backend()
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# We access a *lot* of internal APIs here, so let's disable that message...
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# pylint: disable=protected-access
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extensions = backend._lib.X509_REQ_get_extensions(csr._x509_req) # type: ignore
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extensions = backend._ffi.gc(
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extensions,
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lambda ext: backend._lib.sk_X509_EXTENSION_pop_free(
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ext,
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backend._ffi.addressof(
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backend._lib._original_lib, "X509_EXTENSION_free"
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),
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),
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)
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# With cryptography 35.0.0, we can no longer use obj2txt. Unfortunately it still does
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# not allow to get the raw value of an extension, so we have to use this ugly hack:
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exts = list(csr.extensions)
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for i in range(backend._lib.sk_X509_EXTENSION_num(extensions)):
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ext = backend._lib.sk_X509_EXTENSION_value(extensions, i)
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if ext == backend._ffi.NULL:
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continue
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crit = backend._lib.X509_EXTENSION_get_critical(ext)
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data = backend._lib.X509_EXTENSION_get_data(ext)
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backend.openssl_assert(data != backend._ffi.NULL)
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der: bytes = backend._ffi.buffer(data.data, data.length)[:] # type: ignore
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entry = {
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"critical": (crit == 1),
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"value": base64.b64encode(der).decode("ascii"),
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}
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try:
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oid = obj2txt(
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backend._lib,
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backend._ffi,
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backend._lib.X509_EXTENSION_get_object(ext),
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)
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except AttributeError:
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oid = exts[i].oid.dotted_string
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result[oid] = entry
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return result
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def cryptography_name_to_oid(name: str) -> x509.oid.ObjectIdentifier:
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dotted = OID_LOOKUP.get(name)
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if dotted is None:
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if DOTTED_OID.match(name):
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return x509.oid.ObjectIdentifier(name)
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raise OpenSSLObjectError(f'Cannot find OID for "{name}"')
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return x509.oid.ObjectIdentifier(dotted)
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def cryptography_oid_to_name(
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oid: x509.oid.ObjectIdentifier, *, short: bool = False
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) -> str:
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dotted_string = oid.dotted_string
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names = OID_MAP.get(dotted_string)
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if names:
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name = names[0]
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else:
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try:
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name = oid._name # pylint: disable=protected-access
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if name == "Unknown OID":
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name = dotted_string
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except AttributeError:
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name = dotted_string
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if short:
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return NORMALIZE_NAMES_SHORT.get(name, name)
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return NORMALIZE_NAMES.get(name, name)
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def _get_hex(bytesstr: bytes) -> str:
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if bytesstr is None:
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return bytesstr
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data = binascii.hexlify(bytesstr)
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return to_text(b":".join(data[i : i + 2] for i in range(0, len(data), 2)))
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@t.overload
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def _parse_hex(bytesstr: bytes | str) -> bytes: ...
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@t.overload
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def _parse_hex(bytesstr: bytes | str | None) -> bytes | None: ...
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def _parse_hex(bytesstr: bytes | str | None) -> bytes | None:
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if bytesstr is None:
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return bytesstr
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data = "".join(
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[
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("0" * (2 - len(p)) + p) if len(p) < 2 else p
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for p in to_text(bytesstr).split(":")
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]
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)
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return binascii.unhexlify(data)
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DN_COMPONENT_START_RE = re.compile(b"^ *([a-zA-z0-9.]+) *= *")
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DN_HEX_LETTER = b"0123456789abcdef"
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def _int_to_byte(value: int) -> bytes:
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return bytes((value,))
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def _parse_dn_component(
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name: bytes, *, sep: bytes = b",", decode_remainder: bool = True
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) -> tuple[x509.NameAttribute, bytes]:
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m = DN_COMPONENT_START_RE.match(name)
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if not m:
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raise OpenSSLObjectError(f'cannot start part in "{to_text(name)}"')
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oid = cryptography_name_to_oid(to_text(m.group(1)))
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idx = len(m.group(0))
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decoded_name = []
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sep_str = sep + b"\\"
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if decode_remainder:
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length = len(name)
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if length > idx and name[idx : idx + 1] == b"#":
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# Decoding a hex string
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idx += 1
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while idx + 1 < length:
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ch1 = name[idx : idx + 1]
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ch2 = name[idx + 1 : idx + 2]
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idx1 = DN_HEX_LETTER.find(ch1.lower())
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idx2 = DN_HEX_LETTER.find(ch2.lower())
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if idx1 < 0 or idx2 < 0:
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raise OpenSSLObjectError(
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f'Invalid hex sequence entry "{to_text(ch1 + ch2)}"'
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)
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idx += 2
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decoded_name.append(_int_to_byte(idx1 * 16 + idx2))
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else:
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# Decoding a regular string
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while idx < length:
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i = idx
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while i < length and name[i : i + 1] not in sep_str:
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i += 1
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if i > idx:
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decoded_name.append(name[idx:i])
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idx = i
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while idx + 1 < length and name[idx : idx + 1] == b"\\":
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ch = name[idx + 1 : idx + 2]
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idx1 = DN_HEX_LETTER.find(ch.lower())
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if idx1 >= 0:
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if idx + 2 >= length:
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raise OpenSSLObjectError(
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f'Hex escape sequence "\\{to_text(ch)}" incomplete at end of string'
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)
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ch2 = name[idx + 2 : idx + 3]
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idx2 = DN_HEX_LETTER.find(ch2.lower())
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if idx2 < 0:
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raise OpenSSLObjectError(
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f'Hex escape sequence "\\{to_text(ch + ch2)}" has invalid second letter'
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)
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ch = _int_to_byte(idx1 * 16 + idx2)
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idx += 1
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idx += 2
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decoded_name.append(ch)
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if idx < length and name[idx : idx + 1] == sep:
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break
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else:
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decoded_name.append(name[idx:])
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idx = len(name)
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return x509.NameAttribute(oid, to_text(b"".join(decoded_name))), name[idx:]
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def _parse_dn(name: bytes) -> list[x509.NameAttribute]:
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"""
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Parse a Distinguished Name.
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Can be of the form ``CN=Test, O = Something`` or ``CN = Test,O= Something``.
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"""
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original_name = name
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name = name.lstrip()
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sep = b","
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if name.startswith(b"/"):
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sep = b"/"
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name = name[1:]
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result = []
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while name:
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try:
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attribute, name = _parse_dn_component(name, sep=sep)
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except OpenSSLObjectError as e:
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raise OpenSSLObjectError(
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f"Error while parsing distinguished name {to_text(original_name)!r}: {e}"
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) from e
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result.append(attribute)
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if name:
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if name[0:1] != sep or len(name) < 2:
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raise OpenSSLObjectError(
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f"Error while parsing distinguished name {to_text(original_name)!r}: unexpected end of string"
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)
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name = name[1:]
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return result
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|
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def cryptography_parse_relative_distinguished_name(
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rdn: list[str | bytes],
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) -> cryptography.x509.RelativeDistinguishedName:
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names = []
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for part in rdn:
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try:
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names.append(_parse_dn_component(to_bytes(part), decode_remainder=False)[0])
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except OpenSSLObjectError as e:
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raise OpenSSLObjectError(
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f"Error while parsing relative distinguished name {to_text(part)!r}: {e}"
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) from e
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return cryptography.x509.RelativeDistinguishedName(names)
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|
|
|
|
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def _is_ascii(value: str) -> bool:
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"""Check whether the Unicode string `value` contains only ASCII characters."""
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try:
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value.encode("ascii")
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return True
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except UnicodeEncodeError:
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return False
|
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|
|
|
|
def _adjust_idn(
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value: str, *, idn_rewrite: t.Literal["ignore", "idna", "unicode"]
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) -> str:
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if idn_rewrite == "ignore" or not value:
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return value
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if idn_rewrite == "idna" and _is_ascii(value):
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return value
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if idn_rewrite not in ("idna", "unicode"):
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raise ValueError(f'Invalid value for idn_rewrite: "{idn_rewrite}"')
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if not HAS_IDNA:
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what = "IDNA" if idn_rewrite == "unicode" else "Unicode"
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dest = "Unicode" if idn_rewrite == "unicode" else "IDNA"
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raise OpenSSLObjectError(
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missing_required_lib(
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"idna",
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reason=f'to transform {what} DNS name "{value}" to {dest}',
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)
|
|
)
|
|
# Since IDNA does not like '*' or empty labels (except one empty label at the end),
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# we split and let IDNA only handle labels that are neither empty or '*'.
|
|
parts = value.split(".")
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for index, part in enumerate(parts):
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if part in ("", "*"):
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continue
|
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try:
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if idn_rewrite == "idna":
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parts[index] = idna.encode(part).decode("ascii")
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elif idn_rewrite == "unicode" and part.startswith("xn--"):
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parts[index] = idna.decode(part)
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except idna.IDNAError as exc2008:
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try:
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if idn_rewrite == "idna":
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parts[index] = part.encode("idna").decode("ascii")
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elif idn_rewrite == "unicode" and part.startswith("xn--"):
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parts[index] = part.encode("ascii").decode("idna")
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except Exception as exc2003:
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what = "IDNA" if idn_rewrite == "unicode" else "Unicode"
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dest = "Unicode" if idn_rewrite == "unicode" else "IDNA"
|
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raise OpenSSLObjectError(
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f'Error while transforming part "{part}" of {what} DNS name "{value}" to {dest}.'
|
|
f' IDNA2008 transformation resulted in "{exc2008}", IDNA2003 transformation resulted in "{exc2003}".'
|
|
) from exc2003
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return ".".join(parts)
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|
|
|
|
def _adjust_idn_email(
|
|
value: str, *, idn_rewrite: t.Literal["ignore", "idna", "unicode"]
|
|
) -> str:
|
|
idx = value.find("@")
|
|
if idx < 0:
|
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return value
|
|
return f"{value[:idx]}@{_adjust_idn(value[idx + 1 :], idn_rewrite=idn_rewrite)}"
|
|
|
|
|
|
def _adjust_idn_url(
|
|
value: str, *, idn_rewrite: t.Literal["ignore", "idna", "unicode"]
|
|
) -> str:
|
|
url = urlparse(value)
|
|
host = _adjust_idn(url.hostname, idn_rewrite=idn_rewrite) if url.hostname else None
|
|
if url.username is not None and url.password is not None:
|
|
host = f"{url.username}:{url.password}@{host}"
|
|
elif url.username is not None:
|
|
host = f"{url.username}@{host}"
|
|
if url.port is not None:
|
|
host = f"{host}:{url.port}"
|
|
return urlunparse(
|
|
ParseResult(
|
|
scheme=url.scheme,
|
|
netloc=host or "",
|
|
path=url.path,
|
|
params=url.params,
|
|
query=url.query,
|
|
fragment=url.fragment,
|
|
)
|
|
)
|
|
|
|
|
|
def cryptography_get_name(
|
|
name: str, *, what: str = "Subject Alternative Name"
|
|
) -> x509.GeneralName:
|
|
"""
|
|
Given a name string, returns a cryptography x509.GeneralName object.
|
|
Raises an OpenSSLObjectError if the name is unknown or cannot be parsed.
|
|
"""
|
|
try:
|
|
if name.startswith("DNS:"):
|
|
return x509.DNSName(_adjust_idn(to_text(name[4:]), idn_rewrite="idna"))
|
|
if name.startswith("IP:"):
|
|
address = to_text(name[3:])
|
|
if "/" in address:
|
|
return x509.IPAddress(ipaddress.ip_network(address))
|
|
return x509.IPAddress(ipaddress.ip_address(address))
|
|
if name.startswith("email:"):
|
|
return x509.RFC822Name(
|
|
_adjust_idn_email(to_text(name[6:]), idn_rewrite="idna")
|
|
)
|
|
if name.startswith("URI:"):
|
|
return x509.UniformResourceIdentifier(
|
|
_adjust_idn_url(to_text(name[4:]), idn_rewrite="idna")
|
|
)
|
|
if name.startswith("RID:"):
|
|
m = re.match(r"^([0-9]+(?:\.[0-9]+)*)$", to_text(name[4:]))
|
|
if not m:
|
|
raise OpenSSLObjectError(f'Cannot parse {what} "{name}"')
|
|
return x509.RegisteredID(x509.oid.ObjectIdentifier(m.group(1)))
|
|
if name.startswith("otherName:"):
|
|
# otherName can either be a raw ASN.1 hex string or in the format that OpenSSL works with.
|
|
m = re.match(
|
|
r"^([0-9]+(?:\.[0-9]+)*);([0-9a-fA-F]{1,2}(?::[0-9a-fA-F]{1,2})*)$",
|
|
to_text(name[10:]),
|
|
)
|
|
if m:
|
|
return x509.OtherName(
|
|
x509.oid.ObjectIdentifier(m.group(1)), _parse_hex(m.group(2))
|
|
)
|
|
|
|
# See https://www.openssl.org/docs/man1.0.2/man5/x509v3_config.html - Subject Alternative Name for more
|
|
# defailts on the format expected.
|
|
name = to_text(name[10:], errors="surrogate_or_strict")
|
|
if ";" not in name:
|
|
raise OpenSSLObjectError(
|
|
f'Cannot parse {what} otherName "{name}", must be in the '
|
|
'format "otherName:<OID>;<ASN.1 OpenSSL Encoded String>" or '
|
|
'"otherName:<OID>;<hex string>"'
|
|
)
|
|
|
|
oid, value = name.split(";", 1)
|
|
b_value = serialize_asn1_string_as_der(value)
|
|
return x509.OtherName(x509.ObjectIdentifier(oid), b_value)
|
|
if name.startswith("dirName:"):
|
|
return x509.DirectoryName(
|
|
x509.Name(reversed(_parse_dn(to_bytes(name[8:]))))
|
|
)
|
|
except Exception as e:
|
|
raise OpenSSLObjectError(f'Cannot parse {what} "{name}": {e}') from e
|
|
if ":" not in name:
|
|
raise OpenSSLObjectError(
|
|
f'Cannot parse {what} "{name}" (forgot "DNS:" prefix?)'
|
|
)
|
|
raise OpenSSLObjectError(
|
|
f'Cannot parse {what} "{name}" (potentially unsupported by cryptography backend)'
|
|
)
|
|
|
|
|
|
def _dn_escape_value(value: str) -> str:
|
|
"""
|
|
Escape Distinguished Name's attribute value.
|
|
"""
|
|
value = value.replace("\\", "\\\\")
|
|
for ch in [",", "+", "<", ">", ";", '"']:
|
|
value = value.replace(ch, f"\\{ch}")
|
|
value = value.replace("\0", "\\00")
|
|
if value.startswith((" ", "#")):
|
|
value = f"\\{value[0]}{value[1:]}"
|
|
if value.endswith(" "):
|
|
value = f"{value[:-1]}\\ "
|
|
return value
|
|
|
|
|
|
def cryptography_decode_name(
|
|
name: x509.GeneralName,
|
|
*,
|
|
idn_rewrite: t.Literal["ignore", "idna", "unicode"] = "ignore",
|
|
) -> str:
|
|
"""
|
|
Given a cryptography x509.GeneralName object, returns a string.
|
|
Raises an OpenSSLObjectError if the name is not supported.
|
|
"""
|
|
if idn_rewrite not in ("ignore", "idna", "unicode"):
|
|
raise AssertionError(
|
|
'idn_rewrite must be one of "ignore", "idna", or "unicode"'
|
|
)
|
|
if isinstance(name, x509.DNSName):
|
|
return f"DNS:{_adjust_idn(name.value, idn_rewrite=idn_rewrite)}"
|
|
if isinstance(name, x509.IPAddress):
|
|
if isinstance(name.value, (ipaddress.IPv4Network, ipaddress.IPv6Network)):
|
|
return f"IP:{name.value.network_address.compressed}/{name.value.prefixlen}"
|
|
return f"IP:{name.value.compressed}"
|
|
if isinstance(name, x509.RFC822Name):
|
|
return f"email:{_adjust_idn_email(name.value, idn_rewrite=idn_rewrite)}"
|
|
if isinstance(name, x509.UniformResourceIdentifier):
|
|
return f"URI:{_adjust_idn_url(name.value, idn_rewrite=idn_rewrite)}"
|
|
if isinstance(name, x509.DirectoryName):
|
|
# According to https://datatracker.ietf.org/doc/html/rfc4514.html#section-2.1 the
|
|
# list needs to be reversed, and joined by commas
|
|
return "dirName:" + ",".join(
|
|
[
|
|
f"{to_text(cryptography_oid_to_name(attribute.oid, short=True))}={_dn_escape_value(to_text(attribute.value))}"
|
|
for attribute in reversed(list(name.value))
|
|
]
|
|
)
|
|
if isinstance(name, x509.RegisteredID):
|
|
return f"RID:{name.value.dotted_string}"
|
|
if isinstance(name, x509.OtherName):
|
|
return f"otherName:{name.type_id.dotted_string};{_get_hex(name.value)}"
|
|
raise OpenSSLObjectError(f'Cannot decode name "{name}"')
|
|
|
|
|
|
def _cryptography_get_keyusage(usage: str) -> str:
|
|
"""
|
|
Given a key usage identifier string, returns the parameter name used by cryptography's x509.KeyUsage().
|
|
Raises an OpenSSLObjectError if the identifier is unknown.
|
|
"""
|
|
if usage in ("Digital Signature", "digitalSignature"):
|
|
return "digital_signature"
|
|
if usage in ("Non Repudiation", "nonRepudiation"):
|
|
return "content_commitment"
|
|
if usage in ("Key Encipherment", "keyEncipherment"):
|
|
return "key_encipherment"
|
|
if usage in ("Data Encipherment", "dataEncipherment"):
|
|
return "data_encipherment"
|
|
if usage in ("Key Agreement", "keyAgreement"):
|
|
return "key_agreement"
|
|
if usage in ("Certificate Sign", "keyCertSign"):
|
|
return "key_cert_sign"
|
|
if usage in ("CRL Sign", "cRLSign"):
|
|
return "crl_sign"
|
|
if usage in ("Encipher Only", "encipherOnly"):
|
|
return "encipher_only"
|
|
if usage in ("Decipher Only", "decipherOnly"):
|
|
return "decipher_only"
|
|
raise OpenSSLObjectError(f'Unknown key usage "{usage}"')
|
|
|
|
|
|
def cryptography_parse_key_usage_params(usages: t.Iterable[str]) -> dict[str, bool]:
|
|
"""
|
|
Given a list of key usage identifier strings, returns the parameters for cryptography's x509.KeyUsage().
|
|
Raises an OpenSSLObjectError if an identifier is unknown.
|
|
"""
|
|
params = {
|
|
"digital_signature": False,
|
|
"content_commitment": False,
|
|
"key_encipherment": False,
|
|
"data_encipherment": False,
|
|
"key_agreement": False,
|
|
"key_cert_sign": False,
|
|
"crl_sign": False,
|
|
"encipher_only": False,
|
|
"decipher_only": False,
|
|
}
|
|
for usage in usages:
|
|
params[_cryptography_get_keyusage(usage)] = True
|
|
return params
|
|
|
|
|
|
def cryptography_get_basic_constraints(
|
|
constraints: t.Iterable[str] | None,
|
|
) -> tuple[bool, int | None]:
|
|
"""
|
|
Given a list of constraints, returns a tuple (ca, path_length).
|
|
Raises an OpenSSLObjectError if a constraint is unknown or cannot be parsed.
|
|
"""
|
|
ca = False
|
|
path_length: int | None = None
|
|
if constraints:
|
|
for constraint in constraints:
|
|
if constraint.startswith("CA:"):
|
|
if constraint == "CA:TRUE":
|
|
ca = True
|
|
elif constraint == "CA:FALSE":
|
|
ca = False
|
|
else:
|
|
raise OpenSSLObjectError(
|
|
f'Unknown basic constraint value "{constraint[3:]}" for CA'
|
|
)
|
|
elif constraint.startswith("pathlen:"):
|
|
v = constraint[len("pathlen:") :]
|
|
try:
|
|
path_length = int(v)
|
|
except Exception as e:
|
|
raise OpenSSLObjectError(
|
|
f'Cannot parse path length constraint "{v}" ({e})'
|
|
) from e
|
|
else:
|
|
raise OpenSSLObjectError(f'Unknown basic constraint "{constraint}"')
|
|
return ca, path_length
|
|
|
|
|
|
def cryptography_key_needs_digest_for_signing(
|
|
key: CertificateIssuerPrivateKeyTypes,
|
|
) -> bool:
|
|
"""Tests whether the given private key requires a digest algorithm for signing.
|
|
|
|
Ed25519 and Ed448 keys do not; they need None to be passed as the digest algorithm.
|
|
"""
|
|
if isinstance(
|
|
key, cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PrivateKey
|
|
):
|
|
return False
|
|
if isinstance(key, cryptography.hazmat.primitives.asymmetric.ed448.Ed448PrivateKey):
|
|
return False
|
|
return True
|
|
|
|
|
|
def _compare_public_keys(
|
|
key1: PublicKeyTypes, key2: PublicKeyTypes, *, clazz: type[PublicKeyTypes]
|
|
) -> bool | None:
|
|
a = isinstance(key1, clazz)
|
|
b = isinstance(key2, clazz)
|
|
if not (a or b):
|
|
return None
|
|
if not a or not b:
|
|
return False
|
|
a_bytes = key1.public_bytes(
|
|
serialization.Encoding.Raw, serialization.PublicFormat.Raw
|
|
)
|
|
b_bytes = key2.public_bytes(
|
|
serialization.Encoding.Raw, serialization.PublicFormat.Raw
|
|
)
|
|
return a_bytes == b_bytes
|
|
|
|
|
|
def cryptography_compare_public_keys(
|
|
key1: PublicKeyTypes, key2: PublicKeyTypes
|
|
) -> bool:
|
|
"""Tests whether two public keys are the same.
|
|
|
|
Needs special logic for Ed25519 and Ed448 keys, since they do not have public_numbers().
|
|
"""
|
|
res = _compare_public_keys(
|
|
key1,
|
|
key2,
|
|
clazz=cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PublicKey,
|
|
)
|
|
if res is not None:
|
|
return res
|
|
res = _compare_public_keys(
|
|
key1,
|
|
key2,
|
|
clazz=cryptography.hazmat.primitives.asymmetric.x25519.X25519PublicKey,
|
|
)
|
|
if res is not None:
|
|
return res
|
|
res = _compare_public_keys(
|
|
key1, key2, clazz=cryptography.hazmat.primitives.asymmetric.ed448.Ed448PublicKey
|
|
)
|
|
if res is not None:
|
|
return res
|
|
res = _compare_public_keys(
|
|
key1, key2, clazz=cryptography.hazmat.primitives.asymmetric.x448.X448PublicKey
|
|
)
|
|
if res is not None:
|
|
return res
|
|
return (
|
|
t.cast(PublicKeyTypesWOEdwards, key1).public_numbers()
|
|
== t.cast(PublicKeyTypesWOEdwards, key2).public_numbers()
|
|
)
|
|
|
|
|
|
def _compare_private_keys(
|
|
key1: PrivateKeyTypes, key2: PrivateKeyTypes, *, clazz: type[PrivateKeyTypes]
|
|
) -> bool | None:
|
|
a = isinstance(key1, clazz)
|
|
b = isinstance(key2, clazz)
|
|
if not (a or b):
|
|
return None
|
|
if not a or not b:
|
|
return False
|
|
encryption_algorithm = cryptography.hazmat.primitives.serialization.NoEncryption()
|
|
a_bytes = key1.private_bytes(
|
|
serialization.Encoding.Raw,
|
|
serialization.PrivateFormat.Raw,
|
|
encryption_algorithm=encryption_algorithm,
|
|
)
|
|
b_bytes = key2.private_bytes(
|
|
serialization.Encoding.Raw,
|
|
serialization.PrivateFormat.Raw,
|
|
encryption_algorithm=encryption_algorithm,
|
|
)
|
|
return a_bytes == b_bytes
|
|
|
|
|
|
def cryptography_compare_private_keys(
|
|
key1: PrivateKeyTypes, key2: PrivateKeyTypes
|
|
) -> bool:
|
|
"""Tests whether two private keys are the same.
|
|
|
|
Needs special logic for Ed25519, X25519, and Ed448 keys, since they do not have private_numbers().
|
|
"""
|
|
res = _compare_private_keys(
|
|
key1,
|
|
key2,
|
|
clazz=cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PrivateKey,
|
|
)
|
|
if res is not None:
|
|
return res
|
|
res = _compare_private_keys(
|
|
key1,
|
|
key2,
|
|
clazz=cryptography.hazmat.primitives.asymmetric.x25519.X25519PrivateKey,
|
|
)
|
|
if res is not None:
|
|
return res
|
|
res = _compare_private_keys(
|
|
key1,
|
|
key2,
|
|
clazz=cryptography.hazmat.primitives.asymmetric.ed448.Ed448PrivateKey,
|
|
)
|
|
if res is not None:
|
|
return res
|
|
res = _compare_private_keys(
|
|
key1, key2, clazz=cryptography.hazmat.primitives.asymmetric.x448.X448PrivateKey
|
|
)
|
|
if res is not None:
|
|
return res
|
|
return (
|
|
t.cast(PrivateKeyTypesWOEdwards, key1).private_numbers()
|
|
== t.cast(PrivateKeyTypesWOEdwards, key2).private_numbers()
|
|
)
|
|
|
|
|
|
def parse_pkcs12(
|
|
pkcs12_bytes: bytes, *, passphrase: bytes | str | None = None
|
|
) -> tuple[
|
|
PrivateKeyTypes | None,
|
|
x509.Certificate | None,
|
|
list[x509.Certificate],
|
|
bytes | None,
|
|
]:
|
|
"""Returns a tuple (private_key, certificate, additional_certificates, friendly_name)."""
|
|
passphrase_bytes = None
|
|
if passphrase is not None:
|
|
passphrase_bytes = to_bytes(passphrase)
|
|
|
|
# Main code for cryptography 36.0.0 and forward
|
|
if _load_pkcs12 is not None:
|
|
return _parse_pkcs12_36_0_0(pkcs12_bytes, passphrase=passphrase_bytes)
|
|
|
|
if LooseVersion(cryptography.__version__) >= LooseVersion("35.0"):
|
|
return _parse_pkcs12_35_0_0(pkcs12_bytes, passphrase=passphrase_bytes)
|
|
|
|
return _parse_pkcs12_legacy(pkcs12_bytes, passphrase=passphrase_bytes)
|
|
|
|
|
|
def _parse_pkcs12_36_0_0(
|
|
pkcs12_bytes: bytes, *, passphrase: bytes | None = None
|
|
) -> tuple[
|
|
PrivateKeyTypes | None,
|
|
x509.Certificate | None,
|
|
list[x509.Certificate],
|
|
bytes | None,
|
|
]:
|
|
# Requires cryptography 36.0.0 or newer
|
|
pkcs12 = _load_pkcs12(pkcs12_bytes, passphrase)
|
|
additional_certificates = [cert.certificate for cert in pkcs12.additional_certs]
|
|
private_key = pkcs12.key
|
|
certificate = None
|
|
friendly_name = None
|
|
if pkcs12.cert:
|
|
certificate = pkcs12.cert.certificate
|
|
friendly_name = pkcs12.cert.friendly_name
|
|
return private_key, certificate, additional_certificates, friendly_name
|
|
|
|
|
|
def _parse_pkcs12_35_0_0(
|
|
pkcs12_bytes: bytes, *, passphrase: bytes | None = None
|
|
) -> tuple[
|
|
PrivateKeyTypes | None,
|
|
x509.Certificate | None,
|
|
list[x509.Certificate],
|
|
bytes | None,
|
|
]:
|
|
# Backwards compatibility code for cryptography 35.x
|
|
private_key, certificate, additional_certificates = _load_key_and_certificates(
|
|
pkcs12_bytes, passphrase
|
|
)
|
|
|
|
friendly_name = None
|
|
if certificate:
|
|
# See https://github.com/pyca/cryptography/issues/5760#issuecomment-842687238
|
|
from cryptography.hazmat.backends import default_backend
|
|
|
|
backend = default_backend()
|
|
|
|
# We access a *lot* of internal APIs here, so let's disable that message...
|
|
# pylint: disable=protected-access
|
|
|
|
# This code basically does what load_key_and_certificates() does, but without error-checking.
|
|
# Since load_key_and_certificates succeeded, it should not fail.
|
|
pkcs12 = backend._ffi.gc(
|
|
backend._lib.d2i_PKCS12_bio(
|
|
backend._bytes_to_bio(pkcs12_bytes).bio, # pylint: disable=no-member
|
|
backend._ffi.NULL,
|
|
),
|
|
backend._lib.PKCS12_free,
|
|
)
|
|
certificate_x509_ptr = backend._ffi.new("X509 **")
|
|
with backend._zeroed_null_terminated_buf( # pylint: disable=no-member
|
|
to_bytes(passphrase) if passphrase is not None else None
|
|
) as passphrase_buffer:
|
|
backend._lib.PKCS12_parse(
|
|
pkcs12,
|
|
passphrase_buffer,
|
|
backend._ffi.new("EVP_PKEY **"),
|
|
certificate_x509_ptr,
|
|
backend._ffi.new("Cryptography_STACK_OF_X509 **"),
|
|
)
|
|
if certificate_x509_ptr[0] != backend._ffi.NULL:
|
|
maybe_name = backend._lib.X509_alias_get0(
|
|
certificate_x509_ptr[0], backend._ffi.NULL
|
|
)
|
|
if maybe_name != backend._ffi.NULL:
|
|
friendly_name = backend._ffi.string(maybe_name)
|
|
|
|
return private_key, certificate, additional_certificates, friendly_name
|
|
|
|
|
|
def _parse_pkcs12_legacy(
|
|
pkcs12_bytes: bytes, *, passphrase: bytes | None = None
|
|
) -> tuple[
|
|
PrivateKeyTypes | None,
|
|
x509.Certificate | None,
|
|
list[x509.Certificate],
|
|
bytes | None,
|
|
]:
|
|
# Backwards compatibility code for cryptography < 35.0.0
|
|
private_key, certificate, additional_certificates = _load_key_and_certificates(
|
|
pkcs12_bytes, passphrase
|
|
)
|
|
|
|
# We access a *lot* of internal APIs here, so let's disable that message...
|
|
# pylint: disable=protected-access
|
|
|
|
friendly_name = None
|
|
if certificate:
|
|
# See https://github.com/pyca/cryptography/issues/5760#issuecomment-842687238
|
|
backend = certificate._backend # type: ignore
|
|
maybe_name = backend._lib.X509_alias_get0(certificate._x509, backend._ffi.NULL) # type: ignore
|
|
if maybe_name != backend._ffi.NULL:
|
|
friendly_name = backend._ffi.string(maybe_name)
|
|
return private_key, certificate, additional_certificates, friendly_name
|
|
|
|
|
|
def cryptography_verify_signature(
|
|
*,
|
|
signature: bytes,
|
|
data: bytes,
|
|
hash_algorithm: hashes.HashAlgorithm | None,
|
|
signer_public_key: PublicKeyTypes,
|
|
) -> bool:
|
|
"""
|
|
Check whether the given signature of the given data was signed by the given public key object.
|
|
"""
|
|
try:
|
|
if isinstance(
|
|
signer_public_key,
|
|
cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey,
|
|
):
|
|
if hash_algorithm is None:
|
|
raise OpenSSLObjectError("Need hash_algorithm for RSA keys")
|
|
signer_public_key.verify(
|
|
signature, data, padding.PKCS1v15(), hash_algorithm
|
|
)
|
|
return True
|
|
if isinstance(
|
|
signer_public_key,
|
|
cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey,
|
|
):
|
|
if hash_algorithm is None:
|
|
raise OpenSSLObjectError("Need hash_algorithm for ECC keys")
|
|
signer_public_key.verify(
|
|
signature,
|
|
data,
|
|
cryptography.hazmat.primitives.asymmetric.ec.ECDSA(hash_algorithm),
|
|
)
|
|
return True
|
|
if isinstance(
|
|
signer_public_key,
|
|
cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey,
|
|
):
|
|
if hash_algorithm is None:
|
|
raise OpenSSLObjectError("Need hash_algorithm for DSA keys")
|
|
signer_public_key.verify(signature, data, hash_algorithm)
|
|
return True
|
|
if isinstance(
|
|
signer_public_key,
|
|
cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PublicKey,
|
|
):
|
|
signer_public_key.verify(signature, data)
|
|
return True
|
|
if isinstance(
|
|
signer_public_key,
|
|
cryptography.hazmat.primitives.asymmetric.ed448.Ed448PublicKey,
|
|
):
|
|
signer_public_key.verify(signature, data)
|
|
return True
|
|
raise OpenSSLObjectError(
|
|
f"Unsupported public key type {type(signer_public_key)}"
|
|
)
|
|
except InvalidSignature:
|
|
return False
|
|
|
|
|
|
def cryptography_verify_certificate_signature(
|
|
*, certificate: x509.Certificate, signer_public_key: PublicKeyTypes
|
|
) -> bool:
|
|
"""
|
|
Check whether the given X509 certificate object was signed by the given public key object.
|
|
"""
|
|
return cryptography_verify_signature(
|
|
signature=certificate.signature,
|
|
data=certificate.tbs_certificate_bytes,
|
|
hash_algorithm=certificate.signature_hash_algorithm,
|
|
signer_public_key=signer_public_key,
|
|
)
|
|
|
|
|
|
def get_not_valid_after(obj: x509.Certificate) -> datetime.datetime:
|
|
if CRYPTOGRAPHY_TIMEZONE:
|
|
return obj.not_valid_after_utc
|
|
return obj.not_valid_after
|
|
|
|
|
|
def get_not_valid_before(obj: x509.Certificate) -> datetime.datetime:
|
|
if CRYPTOGRAPHY_TIMEZONE:
|
|
return obj.not_valid_before_utc
|
|
return obj.not_valid_before
|
|
|
|
|
|
def set_not_valid_after(
|
|
builder: x509.CertificateBuilder, value: datetime.datetime
|
|
) -> x509.CertificateBuilder:
|
|
return builder.not_valid_after(value)
|
|
|
|
|
|
def set_not_valid_before(
|
|
builder: x509.CertificateBuilder, value: datetime.datetime
|
|
) -> x509.CertificateBuilder:
|
|
return builder.not_valid_before(value)
|
|
|
|
|
|
def is_potential_certificate_private_key(
|
|
key: PrivateKeyTypes,
|
|
) -> t.TypeGuard[CertificatePrivateKeyTypes]:
|
|
return not isinstance(
|
|
key, cryptography.hazmat.primitives.asymmetric.dh.DHPrivateKey
|
|
)
|
|
|
|
|
|
def is_potential_certificate_issuer_private_key(
|
|
key: PrivateKeyTypes,
|
|
) -> t.TypeGuard[CertificateIssuerPrivateKeyTypes]:
|
|
return not isinstance(
|
|
key,
|
|
(
|
|
cryptography.hazmat.primitives.asymmetric.x25519.X25519PrivateKey,
|
|
cryptography.hazmat.primitives.asymmetric.x448.X448PrivateKey,
|
|
cryptography.hazmat.primitives.asymmetric.dh.DHPrivateKey,
|
|
),
|
|
)
|
|
|
|
|
|
def is_potential_certificate_public_key(
|
|
key: PublicKeyTypes,
|
|
) -> t.TypeGuard[CertificatePublicKeyTypes]:
|
|
return not isinstance(key, DHPublicKey)
|
|
|
|
|
|
def is_potential_certificate_issuer_public_key(
|
|
key: PublicKeyTypes,
|
|
) -> t.TypeGuard[CertificateIssuerPublicKeyTypes]:
|
|
return not isinstance(
|
|
key,
|
|
(
|
|
cryptography.hazmat.primitives.asymmetric.x25519.X25519PublicKey,
|
|
cryptography.hazmat.primitives.asymmetric.x448.X448PublicKey,
|
|
cryptography.hazmat.primitives.asymmetric.dh.DHPublicKey,
|
|
),
|
|
)
|
|
|
|
|
|
__all__ = (
|
|
"CRYPTOGRAPHY_TIMEZONE",
|
|
"cryptography_get_extensions_from_cert",
|
|
"cryptography_get_extensions_from_csr",
|
|
"cryptography_name_to_oid",
|
|
"cryptography_oid_to_name",
|
|
"cryptography_parse_relative_distinguished_name",
|
|
"cryptography_get_name",
|
|
"cryptography_decode_name",
|
|
"cryptography_parse_key_usage_params",
|
|
"cryptography_get_basic_constraints",
|
|
"cryptography_key_needs_digest_for_signing",
|
|
"cryptography_compare_public_keys",
|
|
"cryptography_compare_private_keys",
|
|
"parse_pkcs12",
|
|
"cryptography_verify_signature",
|
|
"cryptography_verify_certificate_signature",
|
|
"get_not_valid_after",
|
|
"get_not_valid_before",
|
|
"set_not_valid_after",
|
|
"set_not_valid_before",
|
|
"is_potential_certificate_private_key",
|
|
"is_potential_certificate_issuer_private_key",
|
|
"is_potential_certificate_public_key",
|
|
"is_potential_certificate_issuer_public_key",
|
|
)
|