mirror of
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![Richard van der Hoff](/assets/img/avatar_default.png)
This appears to have stopped working since matrix.org moved to cloudflare. The Host header should match the name of the server, not whatever is in the SRV record.
284 lines
8.1 KiB
Python
Executable File
284 lines
8.1 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright 2015, 2016 OpenMarket Ltd
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# Copyright 2017 New Vector 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 __future__ import print_function
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import argparse
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from urlparse import urlparse, urlunparse
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import nacl.signing
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import json
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import base64
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import requests
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import sys
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from requests.adapters import HTTPAdapter
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import srvlookup
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import yaml
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# uncomment the following to enable debug logging of http requests
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#from httplib import HTTPConnection
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#HTTPConnection.debuglevel = 1
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def encode_base64(input_bytes):
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"""Encode bytes as a base64 string without any padding."""
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input_len = len(input_bytes)
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output_len = 4 * ((input_len + 2) // 3) + (input_len + 2) % 3 - 2
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output_bytes = base64.b64encode(input_bytes)
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output_string = output_bytes[:output_len].decode("ascii")
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return output_string
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def decode_base64(input_string):
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"""Decode a base64 string to bytes inferring padding from the length of the
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string."""
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input_bytes = input_string.encode("ascii")
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input_len = len(input_bytes)
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padding = b"=" * (3 - ((input_len + 3) % 4))
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output_len = 3 * ((input_len + 2) // 4) + (input_len + 2) % 4 - 2
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output_bytes = base64.b64decode(input_bytes + padding)
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return output_bytes[:output_len]
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def encode_canonical_json(value):
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return json.dumps(
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value,
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# Encode code-points outside of ASCII as UTF-8 rather than \u escapes
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ensure_ascii=False,
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# Remove unecessary white space.
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separators=(',',':'),
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# Sort the keys of dictionaries.
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sort_keys=True,
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# Encode the resulting unicode as UTF-8 bytes.
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).encode("UTF-8")
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def sign_json(json_object, signing_key, signing_name):
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signatures = json_object.pop("signatures", {})
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unsigned = json_object.pop("unsigned", None)
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signed = signing_key.sign(encode_canonical_json(json_object))
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signature_base64 = encode_base64(signed.signature)
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key_id = "%s:%s" % (signing_key.alg, signing_key.version)
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signatures.setdefault(signing_name, {})[key_id] = signature_base64
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json_object["signatures"] = signatures
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if unsigned is not None:
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json_object["unsigned"] = unsigned
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return json_object
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NACL_ED25519 = "ed25519"
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def decode_signing_key_base64(algorithm, version, key_base64):
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"""Decode a base64 encoded signing key
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Args:
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algorithm (str): The algorithm the key is for (currently "ed25519").
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version (str): Identifies this key out of the keys for this entity.
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key_base64 (str): Base64 encoded bytes of the key.
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Returns:
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A SigningKey object.
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"""
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if algorithm == NACL_ED25519:
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key_bytes = decode_base64(key_base64)
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key = nacl.signing.SigningKey(key_bytes)
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key.version = version
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key.alg = NACL_ED25519
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return key
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else:
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raise ValueError("Unsupported algorithm %s" % (algorithm,))
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def read_signing_keys(stream):
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"""Reads a list of keys from a stream
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Args:
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stream : A stream to iterate for keys.
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Returns:
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list of SigningKey objects.
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"""
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keys = []
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for line in stream:
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algorithm, version, key_base64 = line.split()
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keys.append(decode_signing_key_base64(algorithm, version, key_base64))
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return keys
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def request_json(method, origin_name, origin_key, destination, path, content):
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if method is None:
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if content is None:
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method = "GET"
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else:
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method = "POST"
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json_to_sign = {
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"method": method,
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"uri": path,
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"origin": origin_name,
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"destination": destination,
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}
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if content is not None:
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json_to_sign["content"] = json.loads(content)
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signed_json = sign_json(json_to_sign, origin_key, origin_name)
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authorization_headers = []
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for key, sig in signed_json["signatures"][origin_name].items():
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header = "X-Matrix origin=%s,key=\"%s\",sig=\"%s\"" % (
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origin_name, key, sig,
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)
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authorization_headers.append(bytes(header))
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print ("Authorization: %s" % header, file=sys.stderr)
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dest = "matrix://%s%s" % (destination, path)
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print ("Requesting %s" % dest, file=sys.stderr)
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s = requests.Session()
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s.mount("matrix://", MatrixConnectionAdapter())
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result = s.request(
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method=method,
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url=dest,
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headers={
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"Host": destination,
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"Authorization": authorization_headers[0]
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},
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verify=False,
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data=content,
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)
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sys.stderr.write("Status Code: %d\n" % (result.status_code,))
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return result.json()
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def main():
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parser = argparse.ArgumentParser(
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description=
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"Signs and sends a federation request to a matrix homeserver",
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)
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parser.add_argument(
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"-N", "--server-name",
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help="Name to give as the local homeserver. If unspecified, will be "
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"read from the config file.",
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)
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parser.add_argument(
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"-k", "--signing-key-path",
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help="Path to the file containing the private ed25519 key to sign the "
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"request with.",
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)
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parser.add_argument(
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"-c", "--config",
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default="homeserver.yaml",
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help="Path to server config file. Ignored if --server-name and "
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"--signing-key-path are both given.",
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)
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parser.add_argument(
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"-d", "--destination",
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default="matrix.org",
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help="name of the remote homeserver. We will do SRV lookups and "
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"connect appropriately.",
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)
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parser.add_argument(
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"-X", "--method",
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help="HTTP method to use for the request. Defaults to GET if --data is"
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"unspecified, POST if it is."
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)
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parser.add_argument(
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"--body",
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help="Data to send as the body of the HTTP request"
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)
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parser.add_argument(
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"path",
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help="request path. We will add '/_matrix/federation/v1/' to this."
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)
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args = parser.parse_args()
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if not args.server_name or not args.signing_key_path:
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read_args_from_config(args)
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with open(args.signing_key_path) as f:
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key = read_signing_keys(f)[0]
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result = request_json(
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args.method,
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args.server_name, key, args.destination,
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"/_matrix/federation/v1/" + args.path,
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content=args.body,
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)
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json.dump(result, sys.stdout)
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print ("")
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def read_args_from_config(args):
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with open(args.config, 'r') as fh:
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config = yaml.safe_load(fh)
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if not args.server_name:
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args.server_name = config['server_name']
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if not args.signing_key_path:
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args.signing_key_path = config['signing_key_path']
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class MatrixConnectionAdapter(HTTPAdapter):
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@staticmethod
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def lookup(s):
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if s[-1] == ']':
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# ipv6 literal (with no port)
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return s, 8448
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if ":" in s:
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out = s.rsplit(":",1)
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try:
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port = int(out[1])
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except ValueError:
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raise ValueError("Invalid host:port '%s'" % s)
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return out[0], port
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try:
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srv = srvlookup.lookup("matrix", "tcp", s)[0]
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return srv.host, srv.port
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except:
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return s, 8448
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def get_connection(self, url, proxies=None):
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parsed = urlparse(url)
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(host, port) = self.lookup(parsed.netloc)
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netloc = "%s:%d" % (host, port)
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print("Connecting to %s" % (netloc,), file=sys.stderr)
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url = urlunparse((
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"https", netloc, parsed.path, parsed.params, parsed.query,
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parsed.fragment,
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))
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return super(MatrixConnectionAdapter, self).get_connection(url, proxies)
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if __name__ == "__main__":
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main()
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