feat: complete basic functions

Support http,dns and mysql connection. Support custom http, dns response. Support dns rebinding.
Support mysql load local files and jdbc deserialize exploit.

internal/qqwry/download.go

@@ -0,0 +1,99 @@
+package qqwry
+
+import (
+	"bytes"
+	"compress/zlib"
+	"crypto/tls"
+	"encoding/binary"
+	"errors"
+	"io/ioutil"
+	"net/http"
+	"sync"
+	"time"
+
+	log "unknwon.dev/clog/v2"
+)
+
+const (
+	COPY_WRITE_URL = "https://qqwry.mirror.noc.one/copywrite.rar"
+	QQWRY_URL      = "https://qqwry.mirror.noc.one/qqwry.rar"
+)
+
+func get(url string) (b []byte, err error) {
+	client := http.Client{
+		Timeout: 90 * time.Second,
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, // disable verify
+		}}
+	request, _ := http.NewRequest("GET", url, nil)
+	request.Header.Add("User-Agent", "Nali/2.1.2 (Nali CLI, https://nali.skk.moe)")
+
+	resp, err := client.Do(request)
+	if err != nil {
+		return
+	}
+	defer resp.Body.Close()
+
+	b, err = ioutil.ReadAll(resp.Body)
+	return
+}
+
+func getKey(b []byte) (key uint32, err error) {
+	if len(b) != 280 {
+		return 0, errors.New("copywrite.rar is corrupt")
+	}
+	key = binary.LittleEndian.Uint32(b[20:])
+	return
+}
+
+func decrypt(b []byte, key uint32) (_ []byte, err error) {
+	for i := 0; i < 0x200; i++ {
+		key *= uint32(0x805)
+		key++
+		key &= uint32(0xff)
+		b[i] = b[i] ^ byte(key)
+	}
+	rc, err := zlib.NewReader(bytes.NewBuffer(b))
+	if err != nil {
+		return
+	}
+	defer rc.Close()
+	return ioutil.ReadAll(rc)
+}
+
+func download() (err error) {
+	var (
+		copyWriteData, qqwryData []byte
+		wg                       sync.WaitGroup
+	)
+	log.Info("Downloading qqwry.dat...")
+	wg.Add(2)
+	go func() {
+		defer wg.Done()
+		if copyWriteData, err = get(COPY_WRITE_URL); err != nil {
+			return
+		}
+	}()
+
+	go func() {
+		defer wg.Done()
+		if qqwryData, err = get(QQWRY_URL); err != nil {
+			return
+		}
+	}()
+	wg.Wait()
+	if err != nil {
+		return err
+	}
+	var key uint32
+	if key, err = getKey(copyWriteData); err != nil {
+		return
+	}
+	b, err := decrypt(qqwryData, key)
+	if err != nil {
+		return err
+	}
+	_ = ioutil.WriteFile("qqwry.dat", b, 0644)
+
+	return nil
+}