helper.go

// Copyright 2023 Wayback Archiver. All rights reserved.
// Use of this source code is governed by the MIT
// license that can be found in the LICENSE file.

package proxier // import "github.com/wabarc/proxier"

import (
	utls "github.com/refraction-networking/utls"
)

// chrome-like client hello spec
func clientHelloSpec() *utls.ClientHelloSpec {
	return &utls.ClientHelloSpec{
		TLSVersMax:         utls.VersionTLS13,
		TLSVersMin:         utls.VersionTLS12,
		CipherSuites:       []uint16{utls.GREASE_PLACEHOLDER, 0x1301, 0x1302, 0x1303, 0xc02b, 0xc02f, 0xc02c, 0xc030, 0xcca9, 0xcca8, 0xc013, 0xc014, 0x009c, 0x009d, 0x002f, 0x0035},
		CompressionMethods: []uint8{0x0}, // no compression
		Extensions: []utls.TLSExtension{
			&utls.UtlsGREASEExtension{},
			&utls.SNIExtension{},
			&utls.UtlsExtendedMasterSecretExtension{},
			&utls.RenegotiationInfoExtension{},
			&utls.SupportedCurvesExtension{Curves: []utls.CurveID{utls.GREASE_PLACEHOLDER, utls.X25519, utls.CurveP256, utls.CurveP384}},
			&utls.SupportedPointsExtension{SupportedPoints: []byte{0x0}}, // uncompressed
			&utls.SessionTicketExtension{},
			&utls.ALPNExtension{AlpnProtocols: []string{"http/1.1"}},
			&utls.StatusRequestExtension{},
			&utls.SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []utls.SignatureScheme{0x0403, 0x0804, 0x0401, 0x0503, 0x0805, 0x0501, 0x0806, 0x0601}},
			&utls.SCTExtension{},
			&utls.KeyShareExtension{KeyShares: []utls.KeyShare{
				{Group: utls.CurveID(utls.GREASE_PLACEHOLDER), Data: []byte{0}},
				{Group: utls.X25519},
			}},
			&utls.PSKKeyExchangeModesExtension{Modes: []uint8{utls.PskModeDHE}}, // pskModeDHE
			&utls.SupportedVersionsExtension{Versions: []uint16{utls.GREASE_PLACEHOLDER, utls.VersionTLS13, utls.VersionTLS12}},
			&utls.UtlsCompressCertExtension{Algorithms: []utls.CertCompressionAlgo{utls.CertCompressionBrotli}},
			&utls.ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}},
			&utls.UtlsGREASEExtension{},
			&utls.UtlsPaddingExtension{GetPaddingLen: utls.BoringPaddingStyle},
		},
		GetSessionID: nil,
	}
}