def enroll(self, csr):
""" enroll certificate from via MS certsrv """
self.logger.debug('CAhandler.enroll()')
cert_bundle = None
error = None
cert_raw = None
if self.openssl_bin:
# prepare the CSR to be signed
csr = build_pem_file(self.logger, None, b64_url_recode(self.logger, csr), None, True)
# dump csr key
self._file_save('{0}/csr.pem'.format(self.tmp_dir), csr)
# build openssl command and run it
openssl_cmd = self._opensslcmd_build()
rcode = subprocess.call(openssl_cmd)
if rcode:
self.logger.error('CAhandler.enroll(): failed: {0}'.format(rcode))
error = 'rc from enrollment not 0'
# generate certificates we need to return
if os.path.isfile('{0}/cert.pem'.format(self.tmp_dir)):
(cert_bundle, cert_raw) = self._certs_bundle()
else:
error = 'Enrollment failed'
# delete temporary files
self._tmp_dir_delete()
else:
error = 'Config incomplete'
self.logger.debug('Certificate.enroll() ended with error: {0}'.format(error))
return(error, cert_bundle, cert_raw, None)
def _certificate_chain_verify(self, cert, ca_cert):
""" verify certificate chain """
self.logger.debug('CAhandler._certificate_chain_verify()')
error = None
pem_file = build_pem_file(self.logger, None,
b64_url_recode(self.logger, cert), True)
try:
cert = crypto.load_certificate(crypto.FILETYPE_PEM, pem_file)
except Exception as err_:
cert = None
error = err_
if not error:
# Create a certificate store and add ca cert(s)
try:
store = crypto.X509Store()
store.add_cert(ca_cert)
except Exception:
error = 'issuing certificate could not be added to trust-store'
if not error:
# add ca chain to truststore
for cert_name in self.ca_cert_chain_list:
try:
with open(cert_name, 'r') as fso:
cain_cert = crypto.load_certificate(
crypto.FILETYPE_PEM, fso.read())
store.add_cert(cain_cert)
except Exception:
error = 'certificate {0} could not be added to trust store'.format(
cert_name)
if not error:
# Create a certificate context using the store and the downloaded certificate
store_ctx = crypto.X509StoreContext(store, cert)
# Verify the certificate, returns None if it can validate the certificate
try:
# pylint: disable=E1111
result = store_ctx.verify_certificate()
except Exception as err_:
result = str(err_)
else:
result = error
else:
result = 'certificate could not get parsed'
self.logger.debug(
'CAhandler._certificate_chain_verify() ended with {0}'.format(
result))
return result
def enroll(self, csr):
"""enroll certificate via MS-WCCE"""
self.logger.debug("CAhandler.enroll({0})".format(self.template))
cert_bundle = None
error = None
cert_raw = None
if not (self.host and self.user and self.password and self.template):
self.logger.error("Config incomplete")
return ("Config incomplete", None, None, None)
# create request
request = self.request_create()
# recode csr
csr = build_pem_file(self.logger, None, csr, 64, True)
# TODO: currently getting certificate chain is not supported
ca_pem = self._file_load(self.ca_bundle)
try:
# request certificate
cert_raw = convert_byte_to_string(
request.get_cert(convert_string_to_byte(csr))
)
# replace crlf with lf
cert_raw = cert_raw.replace("\r\n", "\n")
except Exception as err_:
cert_raw = None
self.logger.error("ca_server.get_cert() failed with error: {0}".format(err_))
if cert_raw:
if ca_pem:
cert_bundle = cert_raw + ca_pem
else:
cert_bundle = cert_raw
cert_raw = cert_raw.replace("-----BEGIN CERTIFICATE-----\n", "")
cert_raw = cert_raw.replace("-----END CERTIFICATE-----\n", "")
cert_raw = cert_raw.replace("\n", "")
else:
self.logger.error("cert bundling failed")
error = "cert bundling failed"
self.logger.debug("Certificate.enroll() ended")
return (error, cert_bundle, cert_raw, None)
def enroll(self, csr):
""" enroll certificate """
self.logger.debug('CAhandler.enroll()')
cert_bundle = None
cert_raw = None
error = self._config_check()
if not error:
try:
# check CN and SAN against black/whitlist
(result, enforce_cn) = self._csr_check(csr)
if result:
# prepare the CSR
csr = build_pem_file(self.logger, None, b64_url_recode(self.logger, csr), None, True)
# load ca cert and key
(ca_key, ca_cert) = self._ca_load()
# load certificate_profile (if applicable)
if self.openssl_conf:
cert_extension_dic = self._certificate_extensions_load()
else:
cert_extension_dic = []
# creating a rest form CSR
req = crypto.load_certificate_request(crypto.FILETYPE_PEM, csr)
subject = req.get_subject()
if self.cn_enforce and enforce_cn:
self.logger.info('CAhandler.enroll(): overwrite CN with {0}'.format(enforce_cn))
setattr(subject, 'CN', enforce_cn)
# sign csr
cert = crypto.X509()
cert.gmtime_adj_notBefore(0)
cert.gmtime_adj_notAfter(self.cert_validity_days * 86400)
cert.set_issuer(ca_cert.get_subject())
cert.set_subject(subject)
cert.set_pubkey(req.get_pubkey())
cert.set_serial_number(uuid.uuid4().int)
cert.set_version(2)
cert.add_extensions(req.get_extensions())
default_extension_list = [
crypto.X509Extension(convert_string_to_byte('subjectKeyIdentifier'), False, convert_string_to_byte('hash'), subject=cert),
crypto.X509Extension(convert_string_to_byte('authorityKeyIdentifier'), False, convert_string_to_byte('keyid:always'), issuer=ca_cert),
crypto.X509Extension(convert_string_to_byte('basicConstraints'), True, convert_string_to_byte('CA:FALSE')),
crypto.X509Extension(convert_string_to_byte('extendedKeyUsage'), False, convert_string_to_byte('clientAuth,serverAuth')),
]
if cert_extension_dic:
try:
cert.add_extensions(self._certificate_extensions_add(cert_extension_dic, cert, ca_cert))
except BaseException as err_:
self.logger.error('CAhandler.enroll() error while loading extensions form file. Use default set.\nerror: {0}'.format(err_))
cert.add_extensions(default_extension_list)
else:
# add keyUsage if it does not exist in CSR
ku_is_in = False
for ext in req.get_extensions():
if convert_byte_to_string(ext.get_short_name()) == 'keyUsage':
ku_is_in = True
if not ku_is_in:
default_extension_list.append(crypto.X509Extension(convert_string_to_byte('keyUsage'), True, convert_string_to_byte('digitalSignature,keyEncipherment')))
# add default extensions
cert.add_extensions(default_extension_list)
cert.sign(ca_key, 'sha256')
# store certifiate
self._certificate_store(cert)
# create bundle and raw cert
cert_bundle = self._pemcertchain_generate(convert_byte_to_string(crypto.dump_certificate(crypto.FILETYPE_PEM, cert)), open(self.issuer_dict['issuing_ca_cert']).read())
cert_raw = convert_byte_to_string(base64.b64encode(crypto.dump_certificate(crypto.FILETYPE_ASN1, cert)))
else:
error = 'urn:ietf:params:acme:badCSR'
except BaseException as err:
self.logger.error('CAhandler.enroll() error: {0}'.format(err))
error = 'Unknown exception'
self.logger.debug('CAhandler.enroll() ended')
return(error, cert_bundle, cert_raw, None)
def enroll(self, csr):
""" enroll certificate """
# pylint: disable=R0914
self.logger.debug('CAhandler.enroll()')
cert_bundle = None
cert_raw = None
error = self._config_check()
if not error:
request_name = self._requestname_get(csr)
if request_name:
# import CSR to database
_csr_info = self._csr_import(csr, request_name)
# prepare the CSR to be signed
csr = build_pem_file(self.logger, None, b64_url_recode(self.logger, csr), None, True)
# load ca cert and key
(ca_key, ca_cert, ca_id) = self._ca_load()
if ca_key and ca_cert and ca_id:
# load request
req = crypto.load_certificate_request(crypto.FILETYPE_PEM, csr)
# copy cn of request
subject = req.get_subject()
# rewrite CN if required
if not subject.CN:
self.logger.info('rewrite CN to {0}'.format(request_name))
subject.CN = request_name
# create certificate object
cert = crypto.X509()
cert.set_pubkey(req.get_pubkey())
cert.set_version(2)
cert.set_serial_number(uuid.uuid4().int & (1<<63)-1)
cert.set_issuer(ca_cert.get_subject())
# load template if configured
if self.template_name:
(dn_dic, template_dic) = self._template_load()
else:
dn_dic = {}
template_dic = {}
# set cert_validity
if 'validity' in template_dic:
self.logger.info('take validity from template: {0}'.format(template_dic['validity']))
# take validity from template
cert_validity = template_dic['validity']
else:
cert_validity = self.cert_validity_days
cert.gmtime_adj_notBefore(0)
cert.gmtime_adj_notAfter(cert_validity * 86400)
# get extension list from CSR
csr_extensions_list = req.get_extensions()
extension_list = self._extension_list_generate(template_dic, cert, ca_cert, csr_extensions_list)
# add extensions (copy from CSR and take the ones we constructed)
# cert.add_extensions(csr_extensions_list)
cert.add_extensions(extension_list)
if dn_dic:
self.logger.info('modify subject with template data')
subject = self._subject_modify(subject, dn_dic)
cert.set_subject(subject)
# sign csr
cert.sign(ca_key, 'sha256')
serial = cert.get_serial_number()
# get hsshes
issuer_hash = ca_cert.subject_name_hash() & 0x7fffffff
name_hash = cert.subject_name_hash() & 0x7fffffff
# store certificate
self._store_cert(ca_id, request_name, '{:X}'.format(serial), convert_byte_to_string(b64_encode(self.logger, crypto.dump_certificate(crypto.FILETYPE_ASN1, cert))), name_hash, issuer_hash)
cert_bundle = self._pemcertchain_generate(convert_byte_to_string(crypto.dump_certificate(crypto.FILETYPE_PEM, cert)), convert_byte_to_string(crypto.dump_certificate(crypto.FILETYPE_PEM, ca_cert)))
cert_raw = convert_byte_to_string(b64_encode(self.logger, crypto.dump_certificate(crypto.FILETYPE_ASN1, cert)))
else:
error = 'ca lookup failed'
else:
error = 'request_name lookup failed'
self.logger.debug('Certificate.enroll() ended')
return(error, cert_bundle, cert_raw, None)