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# -*- coding: utf-8 -*-
# Copyright 2014 matrix.org
#
# 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.
from _base import SQLBaseStore
from twisted.internet import defer
import OpenSSL
import nacl.signing
class KeyStore(SQLBaseStore):
"""Persistence for signature verification keys and tls X.509 certificates
"""
@defer.inlineCallbacks
def get_server_certificate(self, server_name):
"""Retrieve the TLS X.509 certificate for the given server
Args:
server_name (bytes): The name of the server.
Returns:
(OpenSSL.crypto.X509): The tls certificate.
"""
tls_certificate_bytes, = yield self._simple_select_one(
table="server_tls_certificates",
keyvalues={"server_name": server_name},
retcols=("tls_certificate",),
)
tls_certificate = OpenSSL.crypto.load_certificate(
OpenSSL.crypto.FILETYPE_ASN1, tls_certificate_bytes,
)
defer.returnValue(tls_certificate)
def store_server_certificate(self, server_name, key_server, ts_now_ms,
tls_certificate):
"""Stores the TLS X.509 certificate for the given server
Args:
server_name (bytes): The name of the server.
key_server (bytes): Where the certificate was looked up
ts_now_ms (int): The time now in milliseconds
tls_certificate (OpenSSL.crypto.X509): The X.509 certificate.
"""
tls_certificate_bytes = OpenSSL.crypto.dump_certificate(
OpenSSL.crypto.FILETYPE_ASN1, tls_certificate
)
return self._simple_insert(
table="server_tls_certificates",
keyvalues={
"server_name": server_name,
"key_server": key_server,
"ts_added_ms": ts_now_ms,
"tls_certificate": tls_certificate_bytes,
},
)
@defer.inlineCallbacks
def get_server_verification_key(self, server_name):
"""Retrieve the NACL verification key for a given server
Args:
server_name (bytes): The name of the server.
Returns:
(nacl.signing.VerifyKey): The verification key.
"""
verification_key_bytes, = yield self._simple_select_one(
table="server_signature_keys",
key_values={"server_name": server_name},
retcols=("tls_certificate",),
)
verification_key = nacl.signing.VerifyKey(verification_key_bytes)
defer.returnValue(verification_key)
def store_server_verification_key(self, server_name, key_version,
key_server, ts_now_ms, verification_key):
"""Stores a NACL verification key for the given server.
Args:
server_name (bytes): The name of the server.
key_version (bytes): The version of the key for the server.
key_server (bytes): Where the verification key was looked up
ts_now_ms (int): The time now in milliseconds
verification_key (nacl.signing.VerifyKey): The NACL verify key.
"""
verification_key_bytes = verification_key.encode()
return self._simple_insert(
table="server_signature_keys",
key_values={
"server_name": server_name,
"key_version": key_version,
"key_server": key_server,
"ts_added_ms": ts_now_ms,
"verification_key": verification_key_bytes,
},
)
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