# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
#
# 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 os
from dataclasses import dataclass
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import serialization
from nvflare.lighter.utils import Identity, generate_cert, generate_keys, serialize_cert, serialize_pri_key
dashboard_pp = os.environ.get("NVFL_DASHBOARD_PP")
if dashboard_pp is not None:
dashboard_pp = dashboard_pp.encode("utf-8")
[docs]
@dataclass
class Entity:
"""Class for keeping track of each certificate owner."""
name: str
org: str = None
role: str = None
[docs]
@dataclass
class CertPair:
"""Class for serialized private key and certificate."""
owner: Entity = None
ser_pri_key: str = None
ser_cert: str = None
def _pack(entity, pri_key, cert, passphrase=None):
ser_pri_key = serialize_pri_key(pri_key, passphrase)
ser_cert = serialize_cert(cert)
cert_pair = CertPair(entity, ser_pri_key, ser_cert)
return cert_pair
[docs]
def make_root_cert(subject: Entity):
pri_key, pub_key = generate_keys()
cert = generate_cert(
subject=Identity(subject.name, subject.org, subject.role),
issuer=Identity(subject.name, subject.org, subject.role),
signing_pri_key=pri_key,
subject_pub_key=pub_key,
ca=True,
)
return _pack(subject, pri_key, cert, passphrase=dashboard_pp)
[docs]
def deserialize_ca_key(ser_pri_key):
pri_key = serialization.load_pem_private_key(ser_pri_key, password=dashboard_pp, backend=default_backend())
return pri_key