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Refactor shadowsocks

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This commit is contained in:
世界 2022-04-10 22:51:29 +08:00
parent 3f23b25edf
commit 00cd0d4b8f
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GPG key ID: CD109927C34A63C4
75 changed files with 3169 additions and 1318 deletions
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52
protocol/shadowsocks/protocol.go
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@ -2,23 +2,26 @@ package shadowsocks
import (
"crypto/md5"
"crypto/sha1"
M "github.com/sagernet/sing/common/metadata"
"github.com/sagernet/sing/common/replay"
"github.com/sagernet/sing/protocol/socks"
"hash/crc32"
"io"
"math/rand"
"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/socksaddr"
"golang.org/x/crypto/hkdf"
"net"
)
const MaxPacketSize = 16*1024 - 1
type Session interface {
Key() []byte
ReplayFilter() replay.Filter
}
func Kdf(key, iv []byte, keyLength int) []byte {
subKey := make([]byte, keyLength)
kdf := hkdf.New(sha1.New, key, iv, []byte("ss-subkey"))
common.Must1(io.ReadFull(kdf, subKey))
return subKey
type Method interface {
Name() string
KeyLength() int
DialConn(session Session, conn net.Conn, destination *M.AddrPort) (net.Conn, error)
DialEarlyConn(session Session, conn net.Conn, destination *M.AddrPort) net.Conn
DialPacketConn(session Session, conn net.Conn) socks.PacketConn
}
func Key(password []byte, keySize int) []byte {
@ -43,19 +46,18 @@ func Key(password []byte, keySize int) []byte {
return m[:keySize]
}
func RemapToPrintable(input []byte) {
const charSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!#$%&()*+,./:;<=>?@[]^_`{|}~\\\""
seed := rand.New(rand.NewSource(int64(crc32.ChecksumIEEE(input))))
for i := range input {
input[i] = charSet[seed.Intn(len(charSet))]
}
type ReducedEntropyReader struct {
io.Reader
}
var AddressSerializer = socksaddr.NewSerializer(
socksaddr.AddressFamilyByte(0x01, socksaddr.AddressFamilyIPv4),
socksaddr.AddressFamilyByte(0x04, socksaddr.AddressFamilyIPv6),
socksaddr.AddressFamilyByte(0x03, socksaddr.AddressFamilyFqdn),
socksaddr.WithFamilyParser(func(b byte) byte {
return b & 0x0F
}),
)
func (r *ReducedEntropyReader) Read(p []byte) (n int, err error) {
n, err = r.Reader.Read(p)
if n > 6 {
const charSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!#$%&()*+,./:;<=>?@[]^_`{|}~\\\""
seed := rand.New(rand.NewSource(int64(crc32.ChecksumIEEE(p[:6]))))
for i := range p[:6] {
p[i] = charSet[seed.Intn(len(charSet))]
}
}
return
}