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package transfer
import (
"crypto/aes"
"crypto/cipher"
"net"
"time"
)
type aesConn struct {
conn net.Conn
encStream cipher.StreamWriter
decStream cipher.StreamReader
}
func newAesConn(conn net.Conn, inKey, outKey, inIv, outIv []byte) (net.Conn, error) {
c := &aesConn{conn: conn}
encBlock, err := aes.NewCipher(inKey)
if err != nil {
return nil, err
}
decBlock, err := aes.NewCipher(outKey)
if err != nil {
return nil, err
}
c.encStream = cipher.StreamWriter{S: cipher.NewCTR(encBlock, inIv), W: conn}
c.decStream = cipher.StreamReader{S: cipher.NewCTR(decBlock, outIv), R: conn}
return c, nil
}
func (d *aesConn) Close() error {
return d.conn.Close()
}
func (d *aesConn) LocalAddr() net.Addr {
return d.conn.LocalAddr()
}
func (d *aesConn) RemoteAddr() net.Addr {
return d.conn.RemoteAddr()
}
func (d *aesConn) SetDeadline(t time.Time) error {
return d.conn.SetDeadline(t)
}
func (d *aesConn) SetReadDeadline(t time.Time) error {
return d.conn.SetReadDeadline(t)
}
func (d *aesConn) SetWriteDeadline(t time.Time) error {
return d.conn.SetWriteDeadline(t)
}
func (d *aesConn) Write(b []byte) (n int, err error) {
return d.encStream.Write(b)
}
func (d *aesConn) Read(b []byte) (n int, err error) {
return d.decStream.Read(b)
}
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