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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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2
go.mod
View file

@ -19,7 +19,7 @@ require (
github.com/seiflotfy/cuckoofilter v0.0.0-20220411075957-e3b120b3f5fb
github.com/stretchr/testify v1.8.4
github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
github.com/xtls/reality v0.0.0-20230331223127-176a94313eda
github.com/xtls/reality v0.0.0-20230613075828-e07c3b04b983
golang.org/x/crypto v0.10.0
golang.org/x/net v0.11.0
golang.org/x/sync v0.3.0

4
go.sum
View file

@ -166,8 +166,8 @@ github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e h1:5QefA066A1tF
github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e/go.mod h1:5t19P9LBIrNamL6AcMQOncg/r10y3Pc01AbHeMhwlpU=
github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49uaYMPRU=
github.com/viant/toolbox v0.24.0/go.mod h1:OxMCG57V0PXuIP2HNQrtJf2CjqdmbrOx5EkMILuUhzM=
github.com/xtls/reality v0.0.0-20230331223127-176a94313eda h1:psRJD2RrZbnI0OWyHvXfgYCPqlRM5q5SPDcjDoDBWhE=
github.com/xtls/reality v0.0.0-20230331223127-176a94313eda/go.mod h1:rkuAY1S9F8eI8gDiPDYvACE8e2uwkyg8qoOTuwWov7Y=
github.com/xtls/reality v0.0.0-20230613075828-e07c3b04b983 h1:AMyzgjkh54WocjQSlCnT1LhDc/BKiUqtNOv40AkpURs=
github.com/xtls/reality v0.0.0-20230613075828-e07c3b04b983/go.mod h1:rkuAY1S9F8eI8gDiPDYvACE8e2uwkyg8qoOTuwWov7Y=
github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
go.uber.org/atomic v1.10.0 h1:9qC72Qh0+3MqyJbAn8YU5xVq1frD8bn3JtD2oXtafVQ=

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)
}