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@ -255,7 +255,7 @@ condition applies throughout the request signing process.
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Step 2 add Authorization header:
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GET /target HTTP/1.1
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Authorization: X-Matrix origin=origin.hs.example.com,key="ed25519:key1",sig="ABCDEF..."
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Authorization: X-Matrix origin="origin.hs.example.com",destination="destination.hs.example.com",key="ed25519:key1",sig="ABCDEF..."
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Content-Type: application/json
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<JSON-encoded request body>
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@ -283,14 +283,52 @@ def authorization_headers(origin_name, origin_signing_key,
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for key, sig in signed_json["signatures"][origin_name].items():
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authorization_headers.append(bytes(
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"X-Matrix origin=%s,key=\"%s\",sig=\"%s\"" % (
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origin_name, key, sig,
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"X-Matrix origin=\"%s\",destination=\"%s\",key=\"%s\",sig=\"%s\"" % (
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origin_name, destination_name, key, sig,
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)
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))
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return ("Authorization", authorization_headers)
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return ("Authorization", authorization_headers[0])
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```
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The format of the Authorization header is given in
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[RFC 7235](https://datatracker.ietf.org/doc/html/rfc7235#section-2.1). In
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summary, the header begins with authorization scheme `X-Matrix`, followed by
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one or more spaces, followed by a comma-separated list of parameters written as
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name=value pairs. The names are case insensitive and order does not matter. The
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values must be enclosed in quotes if they contain characters that are not
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allowed in `token`s, as defined in
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[RFC 7230](https://datatracker.ietf.org/doc/html/rfc7230#section-3.2.6); if a
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value is a valid `token`, it may or may not be enclosed in quotes. Quoted
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values may include backslash-escaped characters. When parsing the header, the
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recipient must unescape the characters. That is, a backslash-character pair is
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replaced by the character that follows the backslash.
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For compatibility with older servers, the sender should
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- only include one space after `X-Matrix`,
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- only use lower-case names, and
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- avoid using backslashes in parameter values.
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For compatibility with older servers, the recipient should allow colons to be
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included in values without requiring the value to be enclosed in quotes.
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The authorization parameters to include are:
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- `origin`: the server name of the sending server. This is the same as the
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`origin` field from JSON described in step 1.
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- `destination`: {{< added-in v="1.3" >}} the server name of the receiving
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sender. This is the same as the `destination` field from the JSON described
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in step 1. For compatibility with older servers, recipients should accept
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requests without this parameter, but MUST always send it. If this property
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is included, but the value does not match the receiving server's name, the
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receiving server must deny the request with an HTTP status code 401
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Unauthorized.
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- `key`: the ID, including the algorithm name, of the sending server's key used
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to sign the request.
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- `signature`: the signature of the JSON as calculated in step 1.
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Unknown parameters are ignored.
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### Response Authentication
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Responses are authenticated by the TLS server certificate. A homeserver
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@ -356,13 +394,15 @@ specification](/rooms).
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Whenever a server receives an event from a remote server, the receiving
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server must ensure that the event:
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1. Is a valid event, otherwise it is dropped.
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1. Is a valid event, otherwise it is dropped. For an event to be valid, it
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must contain a `room_id`, and it must comply with the event format of
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that [room version](/rooms).
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2. Passes signature checks, otherwise it is dropped.
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3. Passes hash checks, otherwise it is redacted before being processed
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further.
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4. Passes authorization rules based on the event's auth events,
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otherwise it is rejected.
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5. Passes authorization rules based on the state at the event,
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5. Passes authorization rules based on the state before the event,
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otherwise it is rejected.
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6. Passes authorization rules based on the current state of the room,
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otherwise it is "soft failed".
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Hubert Chathi
3 years ago