crtsh.go

/*
 * Copyleft 2017, Simone Margaritelli <evilsocket at protonmail dot com>
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of ARM Inject nor the names of its contributors may be used
 *     to endorse or promote products derived from this software without
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package xray

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"regexp"
	"strings"
)

type CertSH struct {
}

func NewCertSH() *CertSH {
	return &CertSH{}
}

func (me *CertSH) GetSubDomains(c *Context) []string {
	url := fmt.Sprintf("https://crt.sh/?q=%%25.%s", c.Domain)
	unique := make(map[string]bool)

	if res, err := http.Get(url); err == nil {
		defer res.Body.Close()

		if raw_body, err := ioutil.ReadAll(res.Body); err == nil {
			data := string(raw_body)
			re := regexp.MustCompile(fmt.Sprintf(">([^<\\*%%]+)\\.%s<", regexp.QuoteMeta(c.Domain)))
			if match := re.FindAllString(data, -1); match != nil {
				for _, m := range match {
					m = strings.Trim(m, "><")
					sub := c.GetSubDomain(m)
					unique[sub] = true
				}
			}
		}
	}

	sub := make([]string, len(unique))
	for k := range unique {
		sub = append(sub, k)
	}

	return sub
}