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hardening(proxy): only accept ws & wss relays

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WofWca 2024-08-30 16:36:32 +04:00 • committed by Shelikhoo
parent 14f4c82ff7
commit 0f2bdffba0
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2 changed files with 10 additions and 6 deletions
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5
proxy/lib/snowflake.go
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@ -651,6 +651,11 @@ func checkIsRelayURLAcceptable(
if err != nil {
return fmt.Errorf("bad Relay URL %w", err)
}
// FYI our websocket library also rejects other protocols
// https://github.com/gorilla/websocket/blob/5e002381133d322c5f1305d171f3bdd07decf229/client.go#L174-L181
if parsedRelayURL.Scheme != "wss" && parsedRelayURL.Scheme != "ws" {
return fmt.Errorf("rejected Relay URL protocol")
}
matcher := namematcher.NewNameMatcher(allowedHostNamePattern)
if !matcher.IsMember(parsedRelayURL.Hostname()) || (!allowNonTLSRelay && parsedRelayURL.Scheme != "wss") {
return fmt.Errorf("rejected Relay URL")