6bbffaf075
This is needed in case of time sync issues when the certificate is generated, as PowerShell remoting enforces a valid time validity even for self signed certicates. Change-Id: Ice963035e59660f4a6f52402832cd27551261129 Closes-Bug: #1551239
323 lines
12 KiB
Python
323 lines
12 KiB
Python
# Copyright 2013 Cloudbase Solutions Srl
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
|
|
import ctypes
|
|
from ctypes import wintypes
|
|
import uuid
|
|
|
|
import six
|
|
|
|
from cloudbaseinit.utils.windows import cryptoapi
|
|
from cloudbaseinit.utils import x509constants
|
|
|
|
|
|
malloc = ctypes.cdll.msvcrt.malloc
|
|
malloc.restype = ctypes.c_void_p
|
|
malloc.argtypes = [ctypes.c_size_t]
|
|
|
|
free = ctypes.cdll.msvcrt.free
|
|
free.restype = None
|
|
free.argtypes = [ctypes.c_void_p]
|
|
|
|
STORE_NAME_MY = "My"
|
|
STORE_NAME_ROOT = "Root"
|
|
STORE_NAME_TRUSTED_PEOPLE = "TrustedPeople"
|
|
|
|
X509_START_DATE_INTERVAL = -24 * 60 * 60 * 10000000
|
|
X509_END_DATE_INTERVAL = 10 * 365 * 24 * 60 * 60 * 10000000
|
|
|
|
|
|
class CryptoAPICertManager(object):
|
|
def _get_cert_thumprint(self, cert_context_p):
|
|
thumbprint = None
|
|
|
|
try:
|
|
thumprint_len = wintypes.DWORD()
|
|
|
|
if not cryptoapi.CertGetCertificateContextProperty(
|
|
cert_context_p,
|
|
cryptoapi.CERT_SHA1_HASH_PROP_ID,
|
|
None, ctypes.byref(thumprint_len)):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
size = ctypes.c_size_t(thumprint_len.value)
|
|
thumbprint = malloc(size)
|
|
|
|
if not cryptoapi.CertGetCertificateContextProperty(
|
|
cert_context_p,
|
|
cryptoapi.CERT_SHA1_HASH_PROP_ID,
|
|
thumbprint, ctypes.byref(thumprint_len)):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
thumbprint_ar = ctypes.cast(
|
|
thumbprint,
|
|
ctypes.POINTER(ctypes.c_ubyte *
|
|
thumprint_len.value)).contents
|
|
|
|
thumbprint_str = ""
|
|
for b in thumbprint_ar:
|
|
thumbprint_str += "%02x" % b
|
|
return thumbprint_str
|
|
finally:
|
|
if thumbprint:
|
|
free(thumbprint)
|
|
|
|
def _generate_key(self, container_name, machine_keyset):
|
|
crypt_prov_handle = wintypes.HANDLE()
|
|
key_handle = wintypes.HANDLE()
|
|
|
|
try:
|
|
flags = 0
|
|
if machine_keyset:
|
|
flags |= cryptoapi.CRYPT_MACHINE_KEYSET
|
|
|
|
if not cryptoapi.CryptAcquireContext(
|
|
ctypes.byref(crypt_prov_handle),
|
|
container_name,
|
|
None,
|
|
cryptoapi.PROV_RSA_FULL,
|
|
flags):
|
|
flags |= cryptoapi.CRYPT_NEWKEYSET
|
|
if not cryptoapi.CryptAcquireContext(
|
|
ctypes.byref(crypt_prov_handle),
|
|
container_name,
|
|
None,
|
|
cryptoapi.PROV_RSA_FULL,
|
|
flags):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
# RSA 2048 bits
|
|
if not cryptoapi.CryptGenKey(crypt_prov_handle,
|
|
cryptoapi.AT_SIGNATURE,
|
|
0x08000000, key_handle):
|
|
raise cryptoapi.CryptoAPIException()
|
|
finally:
|
|
if key_handle:
|
|
cryptoapi.CryptDestroyKey(key_handle)
|
|
if crypt_prov_handle:
|
|
cryptoapi.CryptReleaseContext(crypt_prov_handle, 0)
|
|
|
|
@staticmethod
|
|
def _add_system_time_interval(system_time, increment):
|
|
'''increment's unit: 10ns'''
|
|
file_time = cryptoapi.FILETIME()
|
|
if not cryptoapi.SystemTimeToFileTime(ctypes.byref(system_time),
|
|
ctypes.byref(file_time)):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
t = file_time.dwLowDateTime + (file_time.dwHighDateTime << 32)
|
|
t += increment
|
|
|
|
file_time.dwLowDateTime = t & 0xFFFFFFFF
|
|
file_time.dwHighDateTime = t >> 32 & 0xFFFFFFFF
|
|
|
|
new_system_time = cryptoapi.SYSTEMTIME()
|
|
if not cryptoapi.FileTimeToSystemTime(ctypes.byref(file_time),
|
|
ctypes.byref(new_system_time)):
|
|
raise cryptoapi.CryptoAPIException()
|
|
return new_system_time
|
|
|
|
def create_self_signed_cert(self, subject, validity_years=10,
|
|
machine_keyset=True, store_name=STORE_NAME_MY):
|
|
subject_encoded = None
|
|
cert_context_p = None
|
|
store_handle = None
|
|
|
|
container_name = str(uuid.uuid4())
|
|
self._generate_key(container_name, machine_keyset)
|
|
|
|
try:
|
|
subject_encoded_len = wintypes.DWORD()
|
|
|
|
if not cryptoapi.CertStrToName(cryptoapi.X509_ASN_ENCODING,
|
|
subject,
|
|
cryptoapi.CERT_X500_NAME_STR, None,
|
|
None,
|
|
ctypes.byref(subject_encoded_len),
|
|
None):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
size = ctypes.c_size_t(subject_encoded_len.value)
|
|
subject_encoded = ctypes.cast(malloc(size),
|
|
ctypes.POINTER(wintypes.BYTE))
|
|
|
|
if not cryptoapi.CertStrToName(cryptoapi.X509_ASN_ENCODING,
|
|
subject,
|
|
cryptoapi.CERT_X500_NAME_STR, None,
|
|
subject_encoded,
|
|
ctypes.byref(subject_encoded_len),
|
|
None):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
subject_blob = cryptoapi.CRYPTOAPI_BLOB()
|
|
subject_blob.cbData = subject_encoded_len
|
|
subject_blob.pbData = subject_encoded
|
|
|
|
key_prov_info = cryptoapi.CRYPT_KEY_PROV_INFO()
|
|
key_prov_info.pwszContainerName = container_name
|
|
key_prov_info.pwszProvName = None
|
|
key_prov_info.dwProvType = cryptoapi.PROV_RSA_FULL
|
|
key_prov_info.cProvParam = None
|
|
key_prov_info.rgProvParam = None
|
|
key_prov_info.dwKeySpec = cryptoapi.AT_SIGNATURE
|
|
|
|
if machine_keyset:
|
|
key_prov_info.dwFlags = cryptoapi.CRYPT_MACHINE_KEYSET
|
|
else:
|
|
key_prov_info.dwFlags = 0
|
|
|
|
sign_alg = cryptoapi.CRYPT_ALGORITHM_IDENTIFIER()
|
|
sign_alg.pszObjId = cryptoapi.szOID_RSA_SHA1RSA
|
|
|
|
start_time = cryptoapi.SYSTEMTIME()
|
|
cryptoapi.GetSystemTime(ctypes.byref(start_time))
|
|
|
|
end_time = self._add_system_time_interval(
|
|
start_time, X509_END_DATE_INTERVAL)
|
|
|
|
# Needed in case of time sync issues as PowerShell remoting
|
|
# enforces a valid time interval even for self signed certificates
|
|
start_time = self._add_system_time_interval(
|
|
start_time, X509_START_DATE_INTERVAL)
|
|
|
|
cert_context_p = cryptoapi.CertCreateSelfSignCertificate(
|
|
None, ctypes.byref(subject_blob), 0,
|
|
ctypes.byref(key_prov_info),
|
|
ctypes.byref(sign_alg), ctypes.byref(start_time),
|
|
ctypes.byref(end_time), None)
|
|
if not cert_context_p:
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
if not cryptoapi.CertAddEnhancedKeyUsageIdentifier(
|
|
cert_context_p, cryptoapi.szOID_PKIX_KP_SERVER_AUTH):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
if machine_keyset:
|
|
flags = cryptoapi.CERT_SYSTEM_STORE_LOCAL_MACHINE
|
|
else:
|
|
flags = cryptoapi.CERT_SYSTEM_STORE_CURRENT_USER
|
|
|
|
store_handle = cryptoapi.CertOpenStore(
|
|
cryptoapi.CERT_STORE_PROV_SYSTEM, 0, 0, flags,
|
|
six.text_type(store_name))
|
|
if not store_handle:
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
if not cryptoapi.CertAddCertificateContextToStore(
|
|
store_handle, cert_context_p,
|
|
cryptoapi.CERT_STORE_ADD_REPLACE_EXISTING, None):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
return self._get_cert_thumprint(cert_context_p)
|
|
|
|
finally:
|
|
if store_handle:
|
|
cryptoapi.CertCloseStore(store_handle, 0)
|
|
if cert_context_p:
|
|
cryptoapi.CertFreeCertificateContext(cert_context_p)
|
|
if subject_encoded:
|
|
free(subject_encoded)
|
|
|
|
def _get_cert_base64(self, cert_data):
|
|
"""Remove certificate header and footer and also new lines."""
|
|
# It's assured that the certificate is already a string.
|
|
removal = [
|
|
x509constants.PEM_HEADER,
|
|
x509constants.PEM_FOOTER,
|
|
"\r",
|
|
"\n"
|
|
]
|
|
for remove in removal:
|
|
cert_data = cert_data.replace(remove, "")
|
|
return cert_data
|
|
|
|
def import_cert(self, cert_data, machine_keyset=True,
|
|
store_name=STORE_NAME_MY):
|
|
|
|
base64_cert_data = self._get_cert_base64(cert_data)
|
|
|
|
cert_encoded = None
|
|
store_handle = None
|
|
cert_context_p = None
|
|
|
|
try:
|
|
cert_encoded_len = wintypes.DWORD()
|
|
|
|
if not cryptoapi.CryptStringToBinaryW(
|
|
base64_cert_data, len(base64_cert_data),
|
|
cryptoapi.CRYPT_STRING_BASE64,
|
|
None, ctypes.byref(cert_encoded_len),
|
|
None, None):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
size = ctypes.c_size_t(cert_encoded_len.value)
|
|
cert_encoded = ctypes.cast(malloc(size),
|
|
ctypes.POINTER(wintypes.BYTE))
|
|
|
|
if not cryptoapi.CryptStringToBinaryW(
|
|
base64_cert_data, len(base64_cert_data),
|
|
cryptoapi.CRYPT_STRING_BASE64,
|
|
cert_encoded, ctypes.byref(cert_encoded_len),
|
|
None, None):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
if machine_keyset:
|
|
flags = cryptoapi.CERT_SYSTEM_STORE_LOCAL_MACHINE
|
|
else:
|
|
flags = cryptoapi.CERT_SYSTEM_STORE_CURRENT_USER
|
|
|
|
store_handle = cryptoapi.CertOpenStore(
|
|
cryptoapi.CERT_STORE_PROV_SYSTEM, 0, 0, flags,
|
|
six.text_type(store_name))
|
|
if not store_handle:
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
cert_context_p = ctypes.POINTER(cryptoapi.CERT_CONTEXT)()
|
|
|
|
if not cryptoapi.CertAddEncodedCertificateToStore(
|
|
store_handle,
|
|
cryptoapi.X509_ASN_ENCODING |
|
|
cryptoapi.PKCS_7_ASN_ENCODING,
|
|
cert_encoded, cert_encoded_len,
|
|
cryptoapi.CERT_STORE_ADD_REPLACE_EXISTING,
|
|
ctypes.byref(cert_context_p)):
|
|
raise cryptoapi.CryptoAPIException()
|
|
|
|
# Get the UPN (1.3.6.1.4.1.311.20.2.3 OID) from the
|
|
# certificate subject alt name
|
|
upn = None
|
|
upn_len = cryptoapi.CertGetNameString(
|
|
cert_context_p,
|
|
cryptoapi.CERT_NAME_UPN_TYPE, 0,
|
|
None, None, 0)
|
|
if upn_len > 1:
|
|
upn_ar = ctypes.create_unicode_buffer(upn_len)
|
|
if cryptoapi.CertGetNameString(
|
|
cert_context_p,
|
|
cryptoapi.CERT_NAME_UPN_TYPE,
|
|
0, None, upn_ar, upn_len) != upn_len:
|
|
raise cryptoapi.CryptoAPIException()
|
|
upn = upn_ar.value
|
|
|
|
thumbprint = self._get_cert_thumprint(cert_context_p)
|
|
return thumbprint, upn
|
|
finally:
|
|
if cert_context_p:
|
|
cryptoapi.CertFreeCertificateContext(cert_context_p)
|
|
if store_handle:
|
|
cryptoapi.CertCloseStore(store_handle, 0)
|
|
if cert_encoded:
|
|
free(cert_encoded)
|