def certsign(self, sn, pubKey, subject, until, caprivKey): tbs = asn1x509.TbsCertificate({ 'version': 'v1', 'serial_number': sn, 'issuer': asn1x509.Name.build({ 'common_name': 'hsm CA', }), 'subject': asn1x509.Name.build({ 'common_name': subject, }), 'signature': { 'algorithm': 'sha256_rsa', 'parameters': None, }, 'validity': { 'not_before': asn1x509.Time({ 'utc_time': datetime.datetime.now(tz=asn1util.timezone.utc) - datetime.timedelta(days=1), }), 'not_after': asn1x509.Time({ 'utc_time': until, }), }, 'subject_public_key_info': { 'algorithm': { 'algorithm': 'rsa', 'parameters': None, }, 'public_key': pubKey } }) # Sign the TBS Certificate data = tbs.dump() value = self.session.sign( caprivKey, data, PyKCS11.Mechanism(PyKCS11.CKM_SHA256_RSA_PKCS, None)) value = bytes(bytearray(value)) cert = asn1x509.Certificate({ 'tbs_certificate': tbs, 'signature_algorithm': { 'algorithm': 'sha256_rsa', 'parameters': None, }, 'signature_value': value, }) return cert.dump()
def ca(self, sn, pubKey, privKey, label, subject, keyID): tbs = asn1x509.TbsCertificate({ 'version': 'v1', 'serial_number': sn, 'issuer': asn1x509.Name.build({ 'common_name': 'CA', }), 'subject': asn1x509.Name.build({ 'common_name': 'CA', }), 'signature': { 'algorithm': 'sha256_rsa', 'parameters': None, }, 'validity': { 'not_before': asn1x509.Time({ 'utc_time': datetime.datetime(2017, 1, 1, 0, 0), }), 'not_after': asn1x509.Time({ 'utc_time': datetime.datetime(2038, 12, 31, 23, 59), }), }, 'subject_public_key_info': { 'algorithm': { 'algorithm': 'rsa', 'parameters': None, }, 'public_key': pubKey } }) # Sign the TBS Certificate data = tbs.dump() value = self.session.sign( privKey, data, PyKCS11.Mechanism(PyKCS11.CKM_SHA1_RSA_PKCS, None)) value = bytes(bytearray(value)) cert = asn1x509.Certificate({ 'tbs_certificate': tbs, 'signature_algorithm': { 'algorithm': 'sha256_rsa', 'parameters': None, }, 'signature_value': value, }) der_bytes = cert.dump() self.cert_save(der_bytes, label, subject, keyID)
def _generate_mock_cert(req_cert_id: CertId, issuer_cert: Certificate) -> CertRetrieveFuncRet: serial_num = req_cert_id['serial_number'].native tbs_cert = x509.TbsCertificate({ 'version': 'v3', 'serial_number': serial_num, 'issuer': issuer_cert.subject, }) cert = x509.Certificate({ 'tbs_certificate': tbs_cert }) return cert
def build(self, signing_private_key): """ Validates the certificate information, constructs the ASN.1 structure and then signs it :param signing_private_key: An asn1crypto.keys.PrivateKeyInfo or oscrypto.asymmetric.PrivateKey object for the private key to sign the certificate with. If the key is self-signed, this should be the private key that matches the public key, otherwise it needs to be the issuer's private key. :return: An asn1crypto.x509.Certificate object of the newly signed certificate """ is_oscrypto = isinstance(signing_private_key, asymmetric.PrivateKey) if not isinstance( signing_private_key, keys.PrivateKeyInfo ) and not is_oscrypto and signing_private_key is not None: raise TypeError( _pretty_message( ''' signing_private_key must be an instance of asn1crypto.keys.PrivateKeyInfo or oscrypto.asymmetric.PrivateKey, not %s ''', _type_name(signing_private_key))) if self._self_signed is not True and self._issuer is None: raise ValueError( _pretty_message(''' Certificate must be self-signed, or an issuer must be specified ''')) if self._self_signed: self._issuer = self._subject if self._serial_number is None: time_part = int_to_bytes(int(time.time())) random_part = util.rand_bytes(4) self._serial_number = int_from_bytes(time_part + random_part) if self._begin_date is None: self._begin_date = datetime.now(timezone.utc) if self._end_date is None: self._end_date = self._begin_date + timedelta(365) if not self.ca: for ca_only_extension in set([ 'policy_mappings', 'policy_constraints', 'inhibit_any_policy' ]): if ca_only_extension in self._other_extensions: raise ValueError( _pretty_message( ''' Extension %s is only valid for CA certificates ''', ca_only_extension)) if signing_private_key is not None: signature_algo = signing_private_key.algorithm if signature_algo == 'ec': signature_algo = 'ecdsa' signature_algorithm_id = '%s_%s' % (self._hash_algo, signature_algo) else: signature_algorithm_id = '%s_%s' % ( self._hash_algo, "rsa") #making rsa assumption for ease # RFC 3280 4.1.2.5 def _make_validity_time(dt): if dt < datetime(2050, 1, 1, tzinfo=timezone.utc): value = x509.Time(name='utc_time', value=dt) else: value = x509.Time(name='general_time', value=dt) return value def _make_extension(name, value): return { 'extn_id': name, 'critical': self._determine_critical(name), 'extn_value': value } extensions = [] for name in sorted(self._special_extensions): value = getattr(self, '_%s' % name) if name == 'ocsp_no_check': value = core.Null() if value else None if value is not None: extensions.append(_make_extension(name, value)) for name in sorted(self._other_extensions.keys()): extensions.append( _make_extension(name, self._other_extensions[name])) tbs_cert = x509.TbsCertificate({ 'version': 'v3', 'serial_number': self._serial_number, 'signature': { 'algorithm': signature_algorithm_id }, 'issuer': self._issuer, 'validity': { 'not_before': _make_validity_time(self._begin_date), 'not_after': _make_validity_time(self._end_date), }, 'subject': self._subject, 'subject_public_key_info': self._subject_public_key, 'extensions': extensions }) if signing_private_key is None: return tbs_cert elif signing_private_key.algorithm == 'rsa': sign_func = asymmetric.rsa_pkcs1v15_sign elif signing_private_key.algorithm == 'dsa': sign_func = asymmetric.dsa_sign elif signing_private_key.algorithm == 'ec': sign_func = asymmetric.ecdsa_sign if not is_oscrypto: signing_private_key = asymmetric.load_private_key( signing_private_key) signature = sign_func(signing_private_key, tbs_cert.dump(), self._hash_algo) return x509.Certificate({ 'tbs_certificate': tbs_cert, 'signature_algorithm': { 'algorithm': signature_algorithm_id }, 'signature_value': signature })
_SIGNATURE_ALGORITHM = algos.SignedDigestAlgorithm( {"algorithm": u"sha256_rsa"}) _FAKE_SUBJECT = x509.Name.build({u"common_name": u"fake"}) FAKE_CERTIFICATE = \ pem.armor(u"CERTIFICATE", x509.Certificate({ "tbs_certificate": x509.TbsCertificate({ "version": 1, "serial_number": 1, "signature": _SIGNATURE_ALGORITHM, "issuer": _FAKE_SUBJECT, "validity": { "not_before": x509.Time( name="utc_time", value=datetime.datetime(2000, 1, 1)), "not_after": x509.Time( name="utc_time", value=datetime.datetime(2049, 12, 31))}, "subject": _FAKE_SUBJECT, "subject_public_key_info": get_fake_public_key_asn1()}), "signature_algorithm": algos.SignedDigestAlgorithm({ "algorithm": u"sha256_rsa"}), "signature_value": b"fake"}).dump()).decode('utf8') FAKE_CSR = \ pem.armor( u"CERTIFICATE REQUEST", csr.CertificationRequest({
def build_mpc(self, signing_private_key, orq_ip, orq_port): """ Validates the certificate information, constructs the ASN.1 structure and then signs it with a mpc engine :param signing_private_key: An integer identifier for the private key to sign the certificate with. This identifier permits the mpc engine to find the private key associated with the public key exported in the key generation process :return: An asn1crypto.x509.Certificate object of the newly signed certificate """ def rsa_mpc_sign(signing_private_key, tbs_cert_dump, hash_algo, orq_ip, orq_port): # Calculate hash corresponding to tbs_cert_dump [Only SHA256] digest = hashes.Hash(hashes.SHA256(), backend=default_backend()) digest.update(tbs_cert_dump) digest = hexlify(digest.finalize()) print("[Client] Hash: " + digest) # Send HTTP GET request to the orquestrator for signing target = "http://" + orq_ip + ":" + orq_port + "/signMessage/" + str( signing_private_key) + "?message=" + str(digest) r = requests.get(target) response = dict(json.loads(r.text)) # Sign format must be bytearray print("Firma: " + str(response["sign"])) firma = unhexlify(response["sign"]) return firma if self._self_signed is not True and self._issuer is None: raise ValueError( _pretty_message(''' Certificate must be self-signed, or an issuer must be specified ''')) if self._self_signed: self._issuer = self._subject if self._serial_number is None: time_part = int_to_bytes(int(time.time())) random_part = util.rand_bytes(4) self._serial_number = int_from_bytes(time_part + random_part) if self._begin_date is None: self._begin_date = datetime.now(timezone.utc) if self._end_date is None: self._end_date = self._begin_date + timedelta(365) if not self.ca: for ca_only_extension in set([ 'policy_mappings', 'policy_constraints', 'inhibit_any_policy' ]): if ca_only_extension in self._other_extensions: raise ValueError( _pretty_message( ''' Extension %s is only valid for CA certificates ''', ca_only_extension)) # The algorith is forced to be 'rsa' signature_algo = 'rsa' # Hash's algorithm limited to SHA256 (internally) signature_algorithm_id = '%s_%s' % (self._hash_algo, signature_algo) def _make_extension(name, value): return { 'extn_id': name, 'critical': self._determine_critical(name), 'extn_value': value } extensions = [] for name in sorted(self._special_extensions): value = getattr(self, '_%s' % name) if name == 'ocsp_no_check': value = core.Null() if value else None if value is not None: extensions.append(_make_extension(name, value)) for name in sorted(self._other_extensions.keys()): extensions.append( _make_extension(name, self._other_extensions[name])) tbs_cert = x509.TbsCertificate({ 'version': 'v3', 'serial_number': self._serial_number, 'signature': { 'algorithm': signature_algorithm_id }, 'issuer': self._issuer, 'validity': { 'not_before': x509.Time(name='utc_time', value=self._begin_date), 'not_after': x509.Time(name='utc_time', value=self._end_date), }, 'subject': self._subject, 'subject_public_key_info': self._subject_public_key, 'extensions': extensions }) # Function binding sign_func = rsa_mpc_sign print(orq_ip) print(orq_port) signature = sign_func(signing_private_key, tbs_cert.dump(), self._hash_algo, orq_ip, orq_port) return x509.Certificate({ 'tbs_certificate': tbs_cert, 'signature_algorithm': { 'algorithm': signature_algorithm_id }, 'signature_value': signature })