mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-30 04:21:29 +00:00
43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
|
// Copyright 2020 Cloudflare, Inc. All rights reserved. Use of this source code
|
||
|
|
// is governed by a BSD-style license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package tls
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"github.com/cloudflare/circl/hpke"
|
||
|
|
)
|
||
|
|
|
||
|
|
// The mandatory-to-implement HPKE cipher suite for use with the ECH extension.
|
||
|
|
var defaultHPKESuite hpke.Suite
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
var err error
|
||
|
|
defaultHPKESuite, err = hpkeAssembleSuite(
|
||
|
|
uint16(hpke.KEM_X25519_HKDF_SHA256),
|
||
|
|
uint16(hpke.KDF_HKDF_SHA256),
|
||
|
|
uint16(hpke.AEAD_AES128GCM),
|
||
|
|
)
|
||
|
|
if err != nil {
|
||
|
|
panic(fmt.Sprintf("hpke: mandatory-to-implement cipher suite not supported: %s", err))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func hpkeAssembleSuite(kemId, kdfId, aeadId uint16) (hpke.Suite, error) {
|
||
|
|
kem := hpke.KEM(kemId)
|
||
|
|
if !kem.IsValid() {
|
||
|
|
return hpke.Suite{}, errors.New("KEM is not supported")
|
||
|
|
}
|
||
|
|
kdf := hpke.KDF(kdfId)
|
||
|
|
if !kdf.IsValid() {
|
||
|
|
return hpke.Suite{}, errors.New("KDF is not supported")
|
||
|
|
}
|
||
|
|
aead := hpke.AEAD(aeadId)
|
||
|
|
if !aead.IsValid() {
|
||
|
|
return hpke.Suite{}, errors.New("AEAD is not supported")
|
||
|
|
}
|
||
|
|
return hpke.NewSuite(kem, kdf, aead), nil
|
||
|
|
}
|