woofmeow/netfishing
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Add decentralized cryptographic identity

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This commit is contained in:
Alexander Sellite 2026-07-29 22:18:14 -04:00
parent 0b5b78a553
commit fa996a6735
27 changed files with 1733 additions and 58 deletions
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55
network/network_chat_service.gd
View file

@ -50,7 +50,11 @@ func send_local_message(body: String) -> bool:
"request_id": _new_id("chat_request"),
"session_id": _session.get_session_id(),
"body": clean,
"sender_fingerprint": _session.get_local_identity_fingerprint(),
}
request["sender_signature"] = _session.sign_local_action(
"chat_send", NetworkChatProtocol.signature_fields(request)
)
if _session.is_host():
_handle_request(_session.get_local_peer_id(), request)
else:
@ -76,6 +80,19 @@ func _handle_request(peer_id: int, data: Dictionary) -> void:
):
_send_rejection(peer_id, "Message could not be sent.")
return
var record := _session.get_peer_record(peer_id)
if (
record == null
or record.identity_fingerprint != str(data["sender_fingerprint"])
or not _session.verify_peer_action(
peer_id,
"chat_send",
NetworkChatProtocol.signature_fields(data),
data["sender_signature"],
)
):
_send_rejection(peer_id, "Message identity could not be verified.")
return
var request_id: String = data["request_id"]
var ledger: Dictionary = _request_ledgers.get(peer_id, {})
if ledger.has(request_id):
@ -84,15 +101,15 @@ func _handle_request(peer_id: int, data: Dictionary) -> void:
if not _consume_rate(peer_id):
_send_rejection(peer_id, "Slow down.")
return
var record := _session.get_peer_record(peer_id)
if record == null:
return
var message := _make_message(
NetworkChatProtocol.Kind.PLAYER,
peer_id,
record.display_name,
NetworkChatProtocol.sanitize_body(data["body"])
)
message["request_id"] = request_id
message["sender_fingerprint"] = data["sender_fingerprint"]
message["sender_signature"] = data["sender_signature"]
ledger[request_id] = message.duplicate(true)
while ledger.size() > 64:
ledger.erase(ledger.keys().front())
@ -107,15 +124,22 @@ func _make_message(
body: String,
) -> Dictionary:
_sequence += 1
return {
var message := {
"message_id": _new_id("chat"),
"request_id": _new_id("chat_system"),
"session_id": _session.get_session_id(),
"sequence": _sequence,
"kind": kind,
"sender_peer_id": peer_id,
"sender_display_name": display_name.left(24),
"body": body,
"sender_fingerprint": _session.get_host_identity_fingerprint(),
}
if kind == NetworkChatProtocol.Kind.SYSTEM:
message["sender_signature"] = _session.sign_host_action(
"chat_system", NetworkChatProtocol.signature_fields(message)
)
return message
func _broadcast(message: Dictionary) -> void:
@ -142,6 +166,29 @@ func _apply_message(data: Dictionary) -> void:
or _seen_messages.has(str(data["message_id"]))
):
return
var kind := int(data["kind"])
var valid_signature := false
if kind == NetworkChatProtocol.Kind.SYSTEM:
valid_signature = _session.verify_host_action(
"chat_system",
NetworkChatProtocol.signature_fields(data),
data["sender_signature"],
)
else:
var sender_id := int(data["sender_peer_id"])
var record := _session.get_peer_record(sender_id)
valid_signature = (
record != null
and record.identity_fingerprint == str(data["sender_fingerprint"])
and _session.verify_peer_action(
sender_id,
"chat_send",
NetworkChatProtocol.signature_fields(data),
data["sender_signature"],
)
)
if not valid_signature:
return
_seen_messages[data["message_id"]] = true
_history.append(data.duplicate(true))
while _history.size() > NetworkChatProtocol.MAX_HISTORY: