fix: X25519MLKEM768 does not work properly with reality

Author: wwqgtxx

component/tls/reality.go

@@ -26,6 +26,7 @@ import (
 	utls "github.com/metacubex/utls"
 	"golang.org/x/crypto/chacha20poly1305"
 	"golang.org/x/crypto/hkdf"
+	"golang.org/x/exp/slices"
 	"golang.org/x/net/http2"
 )
 
@@ -60,6 +61,27 @@ func GetRealityConn(ctx context.Context, conn net.Conn, ClientFingerprint string
 			return nil, err
 		}
 
+		// ------for X25519MLKEM768 does not work properly with reality-------
+		// Iterate over extensions and check
+		for _, extension := range uConn.Extensions {
+			if ce, ok := extension.(*utls.SupportedCurvesExtension); ok {
+				ce.Curves = slices.DeleteFunc(ce.Curves, func(curveID utls.CurveID) bool {
+					return curveID == utls.X25519MLKEM768
+				})
+			}
+			if ks, ok := extension.(*utls.KeyShareExtension); ok {
+				ks.KeyShares = slices.DeleteFunc(ks.KeyShares, func(share utls.KeyShare) bool {
+					return share.Group == utls.X25519MLKEM768
+				})
+			}
+		}
+		// Rebuild the client hello
+		err = uConn.BuildHandshakeState()
+		if err != nil {
+			return nil, err
+		}
+		// --------------------------------------------------------------------
+
 		hello := uConn.HandshakeState.Hello
 		rawSessionID := hello.Raw[39 : 39+32] // the location of session ID
 		for i := range rawSessionID {         // https://github.com/golang/go/issues/5373