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REALITY protocol: Add ChaCha20-Poly1305 auth mode (#2212)

Browse source 
https://github.com/XTLS/REALITY/pull/4
This commit is contained in:
Hellojack 2023-06-16 00:22:53 +08:00 • committed by yuhan6665
parent 37e1e401a8
commit 65b467e448
3 changed files with 16 additions and 7 deletions
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17
transport/internet/reality/reality.go
View file

@ -30,12 +30,16 @@ import (
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/core"
"github.com/xtls/xray-core/transport/internet/tls"
"golang.org/x/crypto/chacha20poly1305"
"golang.org/x/crypto/hkdf"
"golang.org/x/net/http2"
)
//go:generate go run github.com/xtls/xray-core/common/errors/errorgen
//go:linkname aesgcmPreferred github.com/refraction-networking/utls.aesgcmPreferred
func aesgcmPreferred(ciphers []uint16) bool
type Conn struct {
*reality.Conn
}
@ -136,11 +140,16 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
if _, err := hkdf.New(sha256.New, uConn.AuthKey, hello.Random[:20], []byte("REALITY")).Read(uConn.AuthKey); err != nil {
return nil, err
}
if config.Show {
fmt.Printf("REALITY localAddr: %v\tuConn.AuthKey[:16]: %v\n", localAddr, uConn.AuthKey[:16])
var aead cipher.AEAD
if aesgcmPreferred(hello.CipherSuites) {
block, _ := aes.NewCipher(uConn.AuthKey)
aead, _ = cipher.NewGCM(block)
} else {
aead, _ = chacha20poly1305.New(uConn.AuthKey)
}
if config.Show {
fmt.Printf("REALITY localAddr: %v\tuConn.AuthKey[:16]: %v\tAEAD: %T\n", localAddr, uConn.AuthKey[:16], aead)
}
block, _ := aes.NewCipher(uConn.AuthKey)
aead, _ := cipher.NewGCM(block)
aead.Seal(hello.SessionId[:0], hello.Random[20:], hello.SessionId[:16], hello.Raw)
copy(hello.Raw[39:], hello.SessionId)
}