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fix: PSK extension w/o session cache crashing (#177)

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Fixes a bug causing client to crash (SIGSEGV) WHEN PSK extension is set with empty session cache AND server sends HelloRetryRequest.
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Gaukas Wang 2023-03-30 09:14:55 -06:00 • committed by GitHub
parent 3721531ea9
commit 7aa684a354
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1 changed files with 3 additions and 0 deletions
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u_tls_extensions.go
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@ -1859,6 +1859,9 @@ type FakePreSharedKeyExtension struct {
} }
func (e *FakePreSharedKeyExtension) writeToUConn(uc *UConn) error { func (e *FakePreSharedKeyExtension) writeToUConn(uc *UConn) error {
if session, ok := uc.config.ClientSessionCache.Get(clientSessionCacheKey(uc.conn.RemoteAddr(), uc.config)); !ok || session == nil {
return nil // don't write the extension if there is no session
}
uc.HandshakeState.Hello.PskIdentities = e.PskIdentities uc.HandshakeState.Hello.PskIdentities = e.PskIdentities
uc.HandshakeState.Hello.PskBinders = e.PskBinders uc.HandshakeState.Hello.PskBinders = e.PskBinders
return nil return nil