61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package ss
|
|
|
|
import (
|
|
"bytes"
|
|
"net"
|
|
|
|
"github.com/shadowsocks/go-shadowsocks2/core"
|
|
ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
|
|
)
|
|
|
|
type shadowCipher struct {
|
|
cipher *ss.Cipher
|
|
}
|
|
|
|
func (c *shadowCipher) StreamConn(conn net.Conn) net.Conn {
|
|
return ss.NewConn(conn, c.cipher.Copy())
|
|
}
|
|
|
|
func (c *shadowCipher) PacketConn(conn net.PacketConn) net.PacketConn {
|
|
return ss.NewSecurePacketConn(conn, c.cipher.Copy())
|
|
}
|
|
|
|
func ShadowCipher(method, password string, key string) (core.Cipher, error) {
|
|
if method == "" && password == "" {
|
|
return nil, nil
|
|
}
|
|
|
|
c, _ := ss.NewCipher(method, password)
|
|
if c != nil {
|
|
return &shadowCipher{cipher: c}, nil
|
|
}
|
|
|
|
return core.PickCipher(method, []byte(key), password)
|
|
}
|
|
|
|
// Due to in/out byte length is inconsistent of the shadowsocks.Conn.Write,
|
|
// we wrap around it to make io.Copy happy.
|
|
type shadowConn struct {
|
|
net.Conn
|
|
wbuf *bytes.Buffer
|
|
}
|
|
|
|
func ShadowConn(conn net.Conn, header []byte) net.Conn {
|
|
return &shadowConn{
|
|
Conn: conn,
|
|
wbuf: bytes.NewBuffer(header),
|
|
}
|
|
}
|
|
|
|
func (c *shadowConn) Write(b []byte) (n int, err error) {
|
|
n = len(b) // force byte length consistent
|
|
if c.wbuf.Len() > 0 {
|
|
c.wbuf.Write(b) // append the data to the cached header
|
|
_, err = c.Conn.Write(c.wbuf.Bytes())
|
|
c.wbuf.Reset()
|
|
return
|
|
}
|
|
_, err = c.Conn.Write(b)
|
|
return
|
|
}
|