def read_perspectives(self, perspectives_config):
servers = {}
for server_name, server_config in perspectives_config["servers"].items():
for key_id, key_data in server_config["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
servers.setdefault(server_name, {})[key_id] = verify_key
return servers
def read_perspectives(self, perspectives_config):
servers = {}
for server_name, server_config in perspectives_config["servers"].items(
):
for key_id, key_data in server_config["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
servers.setdefault(server_name, {})[key_id] = verify_key
return servers
def read_old_signing_keys(self, old_signing_keys):
keys = {}
for key_id, key_data in old_signing_keys.items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.expired_ts = key_data["expired_ts"]
keys[key_id] = verify_key
else:
raise ConfigError(
"Unsupported signing algorithm for old key: %r" % (key_id,)
)
return keys
def read_old_signing_keys(self, old_signing_keys):
keys = {}
for key_id, key_data in old_signing_keys.items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.expired_ts = key_data["expired_ts"]
keys[key_id] = verify_key
else:
raise ConfigError(
"Unsupported signing algorithm for old key: %r" %
(key_id, ))
return keys
def get_server_verify_key(self, server_name, key_ids):
"""Finds a verification key for the server with one of the key ids.
Args:
server_name (str): The name of the server to fetch a key for.
keys_ids (list of str): The key_ids to check for.
"""
# Check the datastore to see if we have one cached.
cached = yield self.store.get_server_verify_keys(server_name, key_ids)
if cached:
defer.returnValue(cached[0])
return
# Try to fetch the key from the remote server.
limiter = yield get_retry_limiter(
server_name,
self.clock,
self.store,
)
with limiter:
(response, tls_certificate) = yield fetch_server_key(
server_name, self.hs.tls_context_factory
)
# Check the response.
x509_certificate_bytes = crypto.dump_certificate(
crypto.FILETYPE_ASN1, tls_certificate
)
if ("signatures" not in response
or server_name not in response["signatures"]):
raise ValueError("Key response not signed by remote server")
if "tls_certificate" not in response:
raise ValueError("Key response missing TLS certificate")
tls_certificate_b64 = response["tls_certificate"]
if encode_base64(x509_certificate_bytes) != tls_certificate_b64:
raise ValueError("TLS certificate doesn't match")
verify_keys = {}
for key_id, key_base64 in response["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_keys[key_id] = verify_key
for key_id in response["signatures"][server_name]:
if key_id not in response["verify_keys"]:
raise ValueError(
"Key response must include verification keys for all"
" signatures"
)
if key_id in verify_keys:
verify_signed_json(
response,
server_name,
verify_keys[key_id]
)
# Cache the result in the datastore.
time_now_ms = self.clock.time_msec()
yield self.store.store_server_certificate(
server_name,
server_name,
time_now_ms,
tls_certificate,
)
for key_id, key in verify_keys.items():
yield self.store.store_server_verify_key(
server_name, server_name, time_now_ms, key
)
for key_id in key_ids:
if key_id in verify_keys:
defer.returnValue(verify_keys[key_id])
return
raise ValueError("No verification key found for given key ids")
def get_server_verify_key_v1_direct(self, server_name, key_ids):
"""Finds a verification key for the server with one of the key ids.
Args:
server_name (str): The name of the server to fetch a key for.
keys_ids (list of str): The key_ids to check for.
"""
# Try to fetch the key from the remote server.
(response,
tls_certificate) = yield fetch_server_key(server_name,
self.hs.tls_context_factory)
# Check the response.
x509_certificate_bytes = crypto.dump_certificate(
crypto.FILETYPE_ASN1, tls_certificate)
if ("signatures" not in response
or server_name not in response["signatures"]):
raise ValueError("Key response not signed by remote server")
if "tls_certificate" not in response:
raise ValueError("Key response missing TLS certificate")
tls_certificate_b64 = response["tls_certificate"]
if encode_base64(x509_certificate_bytes) != tls_certificate_b64:
raise ValueError("TLS certificate doesn't match")
# Cache the result in the datastore.
time_now_ms = self.clock.time_msec()
verify_keys = {}
for key_id, key_base64 in response["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.time_added = time_now_ms
verify_keys[key_id] = verify_key
for key_id in response["signatures"][server_name]:
if key_id not in response["verify_keys"]:
raise ValueError(
"Key response must include verification keys for all"
" signatures")
if key_id in verify_keys:
verify_signed_json(response, server_name, verify_keys[key_id])
yield self.store.store_server_certificate(
server_name,
server_name,
time_now_ms,
tls_certificate,
)
yield self.store_keys(
server_name=server_name,
from_server=server_name,
verify_keys=verify_keys,
)
defer.returnValue(verify_keys)
def process_v2_response(self,
server_name,
from_server,
response_json,
requested_id=None):
time_now_ms = self.clock.time_msec()
response_keys = {}
verify_keys = {}
for key_id, key_data in response_json["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.time_added = time_now_ms
verify_keys[key_id] = verify_key
old_verify_keys = {}
for key_id, key_data in response_json["old_verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.expired = key_data["expired_ts"]
verify_key.time_added = time_now_ms
old_verify_keys[key_id] = verify_key
for key_id in response_json["signatures"][server_name]:
if key_id not in response_json["verify_keys"]:
raise ValueError(
"Key response must include verification keys for all"
" signatures")
if key_id in verify_keys:
verify_signed_json(response_json, server_name,
verify_keys[key_id])
signed_key_json = sign_json(
response_json,
self.config.server_name,
self.config.signing_key[0],
)
signed_key_json_bytes = encode_canonical_json(signed_key_json)
ts_valid_until_ms = signed_key_json[u"valid_until_ts"]
updated_key_ids = set()
if requested_id is not None:
updated_key_ids.add(requested_id)
updated_key_ids.update(verify_keys)
updated_key_ids.update(old_verify_keys)
response_keys.update(verify_keys)
response_keys.update(old_verify_keys)
for key_id in updated_key_ids:
yield self.store.store_server_keys_json(
server_name=server_name,
key_id=key_id,
from_server=server_name,
ts_now_ms=time_now_ms,
ts_expires_ms=ts_valid_until_ms,
key_json_bytes=signed_key_json_bytes,
)
defer.returnValue(response_keys)
raise ValueError("No verification key found for given key ids")
def process_v2_response(self, server_name, from_server, response_json,
requested_id=None):
time_now_ms = self.clock.time_msec()
response_keys = {}
verify_keys = {}
for key_id, key_data in response_json["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.time_added = time_now_ms
verify_keys[key_id] = verify_key
old_verify_keys = {}
for key_id, key_data in response_json["old_verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.expired = key_data["expired_ts"]
verify_key.time_added = time_now_ms
old_verify_keys[key_id] = verify_key
for key_id in response_json["signatures"].get(server_name, {}):
if key_id not in response_json["verify_keys"]:
raise ValueError(
"Key response must include verification keys for all"
" signatures"
)
if key_id in verify_keys:
verify_signed_json(
response_json,
server_name,
verify_keys[key_id]
)
signed_key_json = sign_json(
response_json,
self.config.server_name,
self.config.signing_key[0],
)
signed_key_json_bytes = encode_canonical_json(signed_key_json)
ts_valid_until_ms = signed_key_json[u"valid_until_ts"]
updated_key_ids = set()
if requested_id is not None:
updated_key_ids.add(requested_id)
updated_key_ids.update(verify_keys)
updated_key_ids.update(old_verify_keys)
response_keys.update(verify_keys)
response_keys.update(old_verify_keys)
for key_id in updated_key_ids:
yield self.store.store_server_keys_json(
server_name=server_name,
key_id=key_id,
from_server=server_name,
ts_now_ms=time_now_ms,
ts_expires_ms=ts_valid_until_ms,
key_json_bytes=signed_key_json_bytes,
)
defer.returnValue(response_keys)
raise ValueError("No verification key found for given key ids")
def process_v2_response(self, from_server, response_json,
requested_ids=[]):
time_now_ms = self.clock.time_msec()
response_keys = {}
verify_keys = {}
for key_id, key_data in response_json["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.time_added = time_now_ms
verify_keys[key_id] = verify_key
old_verify_keys = {}
for key_id, key_data in response_json["old_verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.expired = key_data["expired_ts"]
verify_key.time_added = time_now_ms
old_verify_keys[key_id] = verify_key
results = {}
server_name = response_json["server_name"]
for key_id in response_json["signatures"].get(server_name, {}):
if key_id not in response_json["verify_keys"]:
raise ValueError(
"Key response must include verification keys for all"
" signatures"
)
if key_id in verify_keys:
verify_signed_json(
response_json,
server_name,
verify_keys[key_id]
)
signed_key_json = sign_json(
response_json,
self.config.server_name,
self.config.signing_key[0],
)
signed_key_json_bytes = encode_canonical_json(signed_key_json)
ts_valid_until_ms = signed_key_json[u"valid_until_ts"]
updated_key_ids = set(requested_ids)
updated_key_ids.update(verify_keys)
updated_key_ids.update(old_verify_keys)
response_keys.update(verify_keys)
response_keys.update(old_verify_keys)
yield defer.gatherResults(
[
self.store.store_server_keys_json(
server_name=server_name,
key_id=key_id,
from_server=server_name,
ts_now_ms=time_now_ms,
ts_expires_ms=ts_valid_until_ms,
key_json_bytes=signed_key_json_bytes,
)
for key_id in updated_key_ids
],
consumeErrors=True,
).addErrback(unwrapFirstError)
results[server_name] = response_keys
defer.returnValue(results)
def process_v2_response(self,
from_server,
response_json,
requested_ids=[]):
time_now_ms = self.clock.time_msec()
response_keys = {}
verify_keys = {}
for key_id, key_data in response_json["verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.time_added = time_now_ms
verify_keys[key_id] = verify_key
old_verify_keys = {}
for key_id, key_data in response_json["old_verify_keys"].items():
if is_signing_algorithm_supported(key_id):
key_base64 = key_data["key"]
key_bytes = decode_base64(key_base64)
verify_key = decode_verify_key_bytes(key_id, key_bytes)
verify_key.expired = key_data["expired_ts"]
verify_key.time_added = time_now_ms
old_verify_keys[key_id] = verify_key
results = {}
server_name = response_json["server_name"]
for key_id in response_json["signatures"].get(server_name, {}):
if key_id not in response_json["verify_keys"]:
raise ValueError(
"Key response must include verification keys for all"
" signatures")
if key_id in verify_keys:
verify_signed_json(response_json, server_name,
verify_keys[key_id])
signed_key_json = sign_json(
response_json,
self.config.server_name,
self.config.signing_key[0],
)
signed_key_json_bytes = encode_canonical_json(signed_key_json)
ts_valid_until_ms = signed_key_json[u"valid_until_ts"]
updated_key_ids = set(requested_ids)
updated_key_ids.update(verify_keys)
updated_key_ids.update(old_verify_keys)
response_keys.update(verify_keys)
response_keys.update(old_verify_keys)
yield defer.gatherResults(
[
self.store.store_server_keys_json(
server_name=server_name,
key_id=key_id,
from_server=server_name,
ts_now_ms=time_now_ms,
ts_expires_ms=ts_valid_until_ms,
key_json_bytes=signed_key_json_bytes,
) for key_id in updated_key_ids
],
consumeErrors=True,
).addErrback(unwrapFirstError)
results[server_name] = response_keys
defer.returnValue(results)
