Refactoring modules

modules/net_sniff/net_sniff_sni.go

@@ -0,0 +1,48 @@
+package net_sniff
+
+import (
+	"fmt"
+
+	"regexp"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+
+	"github.com/evilsocket/islazy/tui"
+)
+
+// poor man's TLS Client Hello with SNI extension parser :P
+var sniRe = regexp.MustCompile("\x00\x00.{4}\x00.{2}([a-z0-9]+([\\-\\.]{1}[a-z0-9]+)*\\.[a-z]{2,6})\x00")
+
+func sniParser(ip *layers.IPv4, pkt gopacket.Packet, tcp *layers.TCP) bool {
+	data := tcp.Payload
+	dataSize := len(data)
+
+	if dataSize < 2 || data[0] != 0x16 || data[1] != 0x03 {
+		return false
+	}
+
+	m := sniRe.FindSubmatch(data)
+	if len(m) < 2 {
+		return false
+	}
+
+	domain := string(m[1])
+	if tcp.DstPort != 443 {
+		domain = fmt.Sprintf("%s:%d", domain, tcp.DstPort)
+	}
+
+	NewSnifferEvent(
+		pkt.Metadata().Timestamp,
+		"https",
+		ip.SrcIP.String(),
+		domain,
+		nil,
+		"%s %s > %s",
+		tui.Wrap(tui.BACKYELLOW+tui.FOREWHITE, "sni"),
+		vIP(ip.SrcIP),
+		tui.Yellow("https://"+domain),
+	).Push()
+
+	return true
+}