Implemented MAC1/2 calculation

src/cookie.go

@@ -1,39 +0,0 @@
-package main
-
-import (
-	"errors"
-	"golang.org/x/crypto/blake2s"
-)
-
-func CalculateCookie(peer *Peer, msg []byte) {
-	size := len(msg)
-
-	if size < blake2s.Size128*2 {
-		panic(errors.New("bug: message too short"))
-	}
-
-	startMac1 := size - (blake2s.Size128 * 2)
-	startMac2 := size - blake2s.Size128
-
-	mac1 := msg[startMac1 : startMac1+blake2s.Size128]
-	mac2 := msg[startMac2 : startMac2+blake2s.Size128]
-
-	peer.mutex.RLock()
-	defer peer.mutex.RUnlock()
-
-	// set mac1
-
-	func() {
-		mac, _ := blake2s.New128(peer.macKey[:])
-		mac.Write(msg[:startMac1])
-		mac.Sum(mac1[:0])
-	}()
-
-	// set mac2
-
-	if peer.cookie != nil {
-		mac, _ := blake2s.New128(peer.cookie)
-		mac.Write(msg[:startMac2])
-		mac.Sum(mac2[:0])
-	}
-}