0x01 介绍
0x01 介绍
这里就是简单利用百度翻译来学习下简单的一个小逆向
技术栈
python
js(debug主要是)
谷歌浏览器
0x02 逆向开始
直接开始
这里通过谷歌浏览器观察接口 查看使用的是ajax 观察参数 发现只有 我们输入的翻译的参数,
和这个sign是可变参数
通过浏览器查询sign:在代码文件中位置
通过debug找到sign参数生成的地方
已知 b(e)参数生成的sign e查看 是我们输入的参数 red 跟进b方法
看到参数确实是输入的翻译对象
可以看到就是这个方法生成的简单粗暴 将这个方法 复制出来
实现思路就是使用 python 调用js 生成sign参数 来实现翻译
import execjs
def get_sign(param):
node = execjs.get()
with open('index.js', encoding='utf-8') as f:
js_code = f.read()
ctx = node.compile(js_code, cwd=r'/usr/local/lib/node_modules')
sign = ctx.call("getSign", param)
return sign
if __name__ == '__main__':
get_sign("red")
说明没扣仔细代码
进入js方法 看r是啥 继续扣代码
添加监视多次调试 发现 r不变参数
查看有少了个n方法 继续debug跟进 扣n
直接复制
再次执行 查看生成成功了
接下来带入接口 开始编写
通过这个网站curl生成
https://curl.iculture.cc
0x03 代码编写
python代码
import requests
import json
import execjs
import sys
def get_sign(param):
node = execjs.get()
with open('index.js', encoding='utf-8') as f:
js_code = f.read()
ctx = node.compile(js_code, cwd=r'/usr/local/lib/node_modules')
sign = ctx.call("getSign", param)
return sign
def requests_api(query,sign):
cookies = {
'BIDUPSID': '1D355A32266119AF444200DE10B5860D',
'PSTM': '1672273407',
'BAIDUID': '1D355A32266119AF30AA94745E42847A:FG=1',
'APPGUIDE_10_0_2': '1',
'REALTIME_TRANS_SWITCH': '1',
'FANYI_WORD_SWITCH': '1',
'HISTORY_SWITCH': '1',
'SOUND_SPD_SWITCH': '1',
'SOUND_PREFER_SWITCH': '1',
'BDUSS': 'zRDdVdvaFFqdTVTUk5TczlJWEs2V0ZaQUdXbFZQN2VOV2syQTBJa3JTRjM2dGhqSVFBQUFBJCQAAAAAAAAAAAEAAAAPG~Bd0KHF6NPR36Owod-jwLIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHddsWN3XbFjM',
'BDUSS_BFESS': 'zRDdVdvaFFqdTVTUk5TczlJWEs2V0ZaQUdXbFZQN2VOV2syQTBJa3JTRjM2dGhqSVFBQUFBJCQAAAAAAAAAAAEAAAAPG~Bd0KHF6NPR36Owod-jwLIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHddsWN3XbFjM',
'BDORZ': 'B490B5EBF6F3CD402E515D22BCDA1598',
'delPer': '0',
'BA_HECTOR': '808gag05a5a404250g2l8k131hs70el1k',
'ZFY': 'DdRTBG6zFyGKGBjz79iNuUWw5qIbak82G6g06Ue:A:A1o:C',
'BAIDUID_BFESS': '1D355A32266119AF30AA94745E42847A:FG=1',
'H_PS_PSSID': '36546_37973_37520_38059_36920_37989_37801_37925_37900_26350_37881',
'PSINO': '7',
'Hm_lvt_64ecd82404c51e03dc91cb9e8c025574': '1672283738,1673503444,1673703892,1673777733',
'Hm_lpvt_64ecd82404c51e03dc91cb9e8c025574': '1673784589',
'ab_sr': '1.0.1_NmE1MmUxMWM4ZDkxODk4OWQ1YTQ0YTk5ODBkNWY5MjU4MGFmM2VjZDllMjQzZDg2OTA5MGU4OTA1YTdlM2NlZjVhYjZiN2M5NzJjZTA3ZjhkZGUxOGJiOWIzMWJhMzUxZTE4NGQzNDM0MGMyZDkwY2Y0Yjk5YjVlNjc1MDkwODc4ZjJjNWQ0MzI3Y2NiZTlkMWNkYWNhM2ZiMDU5MzkyNjY3OWNiOGE4YWFlNzAyOWM2NzQ5ZWQ2YmIzOTlhYTUy',
}
headers = {
'Accept': '*/*',
'Accept-Language': 'zh,zh-CN;q=0.9',
'Acs-Token': '1673769896714_1673784883811_/jNTmMdug05eaCQYNoVx1yA3nMqigRtFMSJAlz/zUNGv7RBNirJgw/ipodbRqwDEyb7KHxOiglOqG75WdKjML39btEAmYi1m0Gv2K7mVaLytJ2mtKLE9nI3/BVnebzTBhpo5ylSR/vuC1W5DnEdo1ueBFXvrbhXtQ9DptFbtkVxwKLZQvDGLm8Vde5RVN23U3q0KRuqvl4k5XBmDt98RRobHmzx8+TaTK3nSQW17Zcz3bpkICt7UxkjsMOalkSaz6sc83xzVacILeSJp8Z0djZjKH1WCIQe9I7iR8YUF4Dghz+MCZpmKW5S9Vs/oTfWT',
'Connection': 'keep-alive',
'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
'Origin': 'https://fanyi.baidu.com',
'Referer': 'https://fanyi.baidu.com/',
'Sec-Fetch-Dest': 'empty',
'Sec-Fetch-Mode': 'cors',
'Sec-Fetch-Site': 'same-origin',
'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.5383.175 Safari/537.36',
'X-Requested-With': 'XMLHttpRequest',
'sec-ch-ua': '"(Not(A:Brand";v="99", "Chromium";v="110", "Google Chrome";v="110"',
'sec-ch-ua-mobile': '?0',
'sec-ch-ua-platform': '"Linux"',
}
params = {
'from': 'en',
'to': 'zh',
}
data = {
'from': 'en',
'to': 'zh',
'query': query,
'transtype': 'realtime',
'simple_means_flag': '3',
'sign': sign,
'token': '0c230afd3ad0ebe562d48955772dde4b',
'domain': 'common',
}
response = requests.post('https://fanyi.baidu.com/v2transapi', params=params, cookies=cookies, headers=headers, data=data)
json_data = json.loads(response.text)
res = json_data['trans_result']['data'][0]['dst']
print("翻译结果:", res)
if __name__ == '__main__':
query = sys.argv[1]
if query != '':
requests_api(query,get_sign(query))
js代码
function n(t, e) {
for (var n = 0; n < e.length - 2; n += 3) {
var r = e.charAt(n + 2);
r = "a" <= r ? r.charCodeAt(0) - 87 : Number(r),
r = "+" === e.charAt(n + 1) ? t >>> r : t << r,
t = "+" === e.charAt(n) ? t + r & 4294967295 : t ^ r
}
return t
}
function getSign (t) {
var o, i = t.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
var r = "320305.131321201"
if (null === i) {
var a = t.length;
a > 30 && (t = "".concat(t.substr(0, 10)).concat(t.substr(Math.floor(a / 2) - 5, 10)).concat(t.substr(-10, 10)))
} else {
for (var s = t.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), c = 0, u = s.length, l = []; c < u; c++)
"" !== s[c] && l.push.apply(l, function(t) {
if (Array.isArray(t))
return e(t)
}(o = s[c].split("")) || function(t) {
if ("undefined" != typeof Symbol && null != t[Symbol.iterator] || null != t["@@iterator"])
return Array.from(t)
}(o) || function(t, n) {
if (t) {
if ("string" == typeof t)
return e(t, n);
var r = Object.prototype.toString.call(t).slice(8, -1);
return "Object" === r && t.constructor && (r = t.constructor.name),
"Map" === r || "Set" === r ? Array.from(t) : "Arguments" === r || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r) ? e(t, n) : void 0
}
}(o) || function() {
throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")
}()),
c !== u - 1 && l.push(i[c]);
var p = l.length;
p > 30 && (t = l.slice(0, 10).join("") + l.slice(Math.floor(p / 2) - 5, Math.floor(p / 2) + 5).join("") + l.slice(-10).join(""))
}
for (var d = "".concat(String.fromCharCode(103)).concat(String.fromCharCode(116)).concat(String.fromCharCode(107)), h = (null !== r ? r : (r = window[d] || "") || "").split("."), f = Number(h[0]) || 0, m = Number(h[1]) || 0, g = [], y = 0, v = 0; v < t.length; v++) {
var _ = t.charCodeAt(v);
_ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
g[y++] = _ >> 18 | 240,
g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
g[y++] = _ >> 6 & 63 | 128),
g[y++] = 63 & _ | 128)
}
for (var b = f, w = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(97)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(54)), k = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(51)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(98)) + "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(102)), x = 0; x < g.length; x++)
b = n(b += g[x], w);
return b = n(b, k),
(b ^= m) < 0 && (b = 2147483648 + (2147483647 & b)),
"".concat((b %= 1e6).toString(), ".").concat(b ^ f)
}
0x04 总结
就是不断的debug 合理利用浏览器 寻找我们需要的参数 然后提取出来封装成我们调用的方法来使用