119 lines
4.5 KiB
Python
119 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from _base import SQLBaseStore
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from twisted.internet import defer
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import OpenSSL
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from syutil.crypto.signing_key import decode_verify_key_bytes
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import hashlib
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class KeyStore(SQLBaseStore):
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"""Persistence for signature verification keys and tls X.509 certificates
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"""
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@defer.inlineCallbacks
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def get_server_certificate(self, server_name):
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"""Retrieve the TLS X.509 certificate for the given server
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Args:
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server_name (bytes): The name of the server.
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Returns:
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(OpenSSL.crypto.X509): The tls certificate.
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"""
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tls_certificate_bytes, = yield self._simple_select_one(
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table="server_tls_certificates",
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keyvalues={"server_name": server_name},
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retcols=("tls_certificate",),
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)
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tls_certificate = OpenSSL.crypto.load_certificate(
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OpenSSL.crypto.FILETYPE_ASN1, tls_certificate_bytes,
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)
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defer.returnValue(tls_certificate)
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def store_server_certificate(self, server_name, from_server, time_now_ms,
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tls_certificate):
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"""Stores the TLS X.509 certificate for the given server
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Args:
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server_name (str): The name of the server.
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from_server (str): Where the certificate was looked up
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time_now_ms (int): The time now in milliseconds
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tls_certificate (OpenSSL.crypto.X509): The X.509 certificate.
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"""
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tls_certificate_bytes = OpenSSL.crypto.dump_certificate(
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OpenSSL.crypto.FILETYPE_ASN1, tls_certificate
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)
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fingerprint = hashlib.sha256(tls_certificate_bytes).hexdigest()
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return self._simple_insert(
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table="server_tls_certificates",
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values={
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"server_name": server_name,
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"fingerprint": fingerprint,
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"from_server": from_server,
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"ts_added_ms": time_now_ms,
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"tls_certificate": buffer(tls_certificate_bytes),
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},
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or_ignore=True,
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)
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@defer.inlineCallbacks
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def get_server_verify_keys(self, server_name, key_ids):
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"""Retrieve the NACL verification key for a given server for the given
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key_ids
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Args:
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server_name (str): The name of the server.
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key_ids (list of str): List of key_ids to try and look up.
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Returns:
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(list of VerifyKey): The verification keys.
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"""
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sql = (
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"SELECT key_id, verify_key FROM server_signature_keys"
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" WHERE server_name = ?"
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" AND key_id in (" + ",".join("?" for key_id in key_ids) + ")"
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)
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rows = yield self._execute_and_decode(sql, server_name, *key_ids)
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keys = []
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for row in rows:
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key_id = row["key_id"]
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key_bytes = row["verify_key"]
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key = decode_verify_key_bytes(key_id, str(key_bytes))
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keys.append(key)
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defer.returnValue(keys)
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def store_server_verify_key(self, server_name, from_server, time_now_ms,
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verify_key):
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"""Stores a NACL verification key for the given server.
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Args:
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server_name (str): The name of the server.
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key_id (str): The version of the key for the server.
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from_server (str): Where the verification key was looked up
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ts_now_ms (int): The time now in milliseconds
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verification_key (VerifyKey): The NACL verify key.
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"""
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verify_key_bytes = verify_key.encode()
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return self._simple_insert(
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table="server_signature_keys",
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values={
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"server_name": server_name,
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"key_id": "%s:%s" % (verify_key.alg, verify_key.version),
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"from_server": from_server,
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"ts_added_ms": time_now_ms,
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"verify_key": buffer(verify_key.encode()),
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},
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or_ignore=True,
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)
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