Move clienhello to faketls

mtglib/internal/faketls/init.go

@@ -0,0 +1,18 @@
+package faketls
+
+import "errors"
+
+const (
+	RandomLen = 32
+
+	ClientHelloRandomOffset    = 6
+	ClientHelloSessionIDOffset = ClientHelloRandomOffset + RandomLen
+	ClientHelloMinLen      = ClientHelloSessionIDOffset + 1
+
+	HandshakeTypeClient = 0x01
+)
+
+var (
+	ErrBadDigest        = errors.New("bad digest")
+	ErrAntiReplayAttack = errors.New("antireplay attack was detected")
+)