├── .gitignore
├── LICENSE
├── README.md
├── __init__.py
├── assets
├── 2023-08-27-20-25-43.png
├── 2023-08-27-22-11-39.png
├── 2023-08-28-22-00-16.png
├── 2023-08-28-22-02-16.png
├── 2023-08-28-22-06-26.png
├── 2023-08-28-22-20-47.png
├── 2023-08-28-22-35-51.png
├── 2023-08-28-22-45-53.png
├── 2023-08-28-22-49-18.png
├── 2023-08-28-23-31-15.png
├── 2023-08-31-13-32-37.png
├── 2023-08-31-13-35-49.png
├── 2023-11-05-19-21-50.png
└── 2023-11-05-19-35-53.png
├── docs
└── Analysis-of-Login-Process-New.md
├── encrypt.js
├── examples
├── config.ini
├── get_captchas.py
├── get_postgraduate_lecture_list.py
├── login_to_dekt.py
├── login_to_ehall.py
└── query_seu_points.py
├── requirements.txt
├── seu_auth.py
├── seu_auth_mobile.py
└── seu_auth_newids.py
/.gitignore:
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1 | __pycache__/
2 | .idea/
3 | .vscode/
4 | *venv/
5 |
6 | .python-version
7 | *test*
8 | *local*
9 |
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/README.md:
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1 | # SEU-Auth
2 |
3 | 东南大学身份认证页面的逆向、模拟登录,可用于其他自动化脚本的身份认证过程。
4 |
5 | - [SEU-Auth](#seu-auth)
6 | - [SEU 身份认证系统介绍](#seu-身份认证系统介绍)
7 | - [新版](#新版)
8 | - [旧版](#旧版)
9 | - [移动端](#移动端)
10 | - [目录说明](#目录说明)
11 | - [模拟登录脚本说明](#模拟登录脚本说明)
12 | - [新版](#新版-1)
13 | - [旧版](#旧版-1)
14 | - [移动端](#移动端-1)
15 | - [使用示例](#使用示例)
16 | - [详细过程分析](#详细过程分析)
17 |
18 | ## SEU 身份认证系统介绍
19 |
20 | 目前东南大学在使用的 Web 端身份认证系统有主要两个版本,分别是:
21 |
22 | - (下文中称为 **_新版身份认证系统_** )
23 |
24 | 
25 |
26 | - (下文中称为 **_旧版身份认证系统_** )
27 |
28 | 
29 |
30 | 现在一部分常用应用的身份认证已迁移到新版系统(比如[网上办事服务大厅](http://ehall.seu.edu.cn/)、[第二课堂](http://dekt.seu.edu.cn/)等),也还有不少还在使用旧版(比如[邮箱](https://mail.seu.edu.cn/)、[SRTP](http://cxcy.seu.edu.cn/)、网上办事服务大厅里的很多应用等),所以目前是两个版本的身份认证系统并存。
31 |
32 | 而且存在这样一种情况:访问网上办事服务大厅,经过新版身份认证登录,再访问其中的某个应用,还需要再经过旧版认证,所以本仓库对两个版本的身份认证都提供了实现。
33 |
34 | 除去 Web 端之外,还有 **_移动端身份认证系统_**,主要用于东大信息化 App 的登录,本仓库同样提供了实现与示例代码。
35 |
36 | 
37 |
38 | 而更老的身份认证()已经基本不会再使用。
39 |
40 | ### 新版
41 |
42 | 采用 RSA 加密用户密码,公钥通过单独的请求获取,Cookie 中需要附带与公钥相匹配的 UID。
43 |
44 | 登录流程如下:
45 |
46 | ```mermaid
47 | flowchart LR
48 | A[/"请求公钥\n保存对应的 Cookie"/]
49 | B[/"使用公钥加密用户密码"/]
50 | C[/"提交登录请求\n包含用户名、加密后的密码、Cookie"/]
51 | D[/"成功获取 TGT,完成登录"/]
52 | A-->B
53 | B-->C
54 | C-->D
55 | ```
56 |
57 | 详细的登录过程分析见 [Wiki](https://github.com/Golevka2001/SEU-Auth/wiki/%E6%96%B0%E7%89%88%E8%BA%AB%E4%BB%BD%E8%AE%A4%E8%AF%81%E7%B3%BB%E7%BB%9F%E7%99%BB%E5%BD%95%E8%BF%87%E7%A8%8B%E5%88%86%E6%9E%90) 页面。
58 |
59 | ### 旧版
60 |
61 | 采用 AES 加密用户密码,密钥和 Ticket 等写在 HTML 里,Ticket 需要写在载荷中。
62 |
63 | 登录流程如下:
64 |
65 | ```mermaid
66 | flowchart LR
67 | A[/"从登录页面获取\n密钥、Ticket等"/]
68 | B[/"使用对称密钥加密用户密码"/]
69 | C[/"提交登录请求\n包含用户名、加密后的密码、Ticket"/]
70 | D[/"成功登录"/]
71 | A-->B
72 | B-->C
73 | C-->D
74 | ```
75 |
76 | 【登录过程分析待更新】
77 |
78 | ### 移动端
79 |
80 | 采用……哦,根本不加密,直接明文传输用户密码。
81 |
82 | 
83 |
84 | 登录流程也十分简单:
85 |
86 | 用户输入用户名、密码后,附带设备名、序列号等一起发送给服务器。通过身份验证后,服务器返回 TGT 以及加密后的密码,由客户端保存,下次启动应用时发送设备序列号、一卡通号、加密后的密码完成登录。
87 |
88 | 需要注意的是,采用了单点登录的机制,启动应用时发起的登录请求的响应头中包含了一个 `ssoCookie` 字段,需要在后续的请求中作为 Cookie 附带(在脚本中需要手动添加)。
89 |
90 | ## 目录说明
91 |
92 | - [`assets/`](./assets/)
93 | - [`docs/`](./docs/)
94 | - [`Analysis-of-Login-Process-New.md`](./docs/Analysis-of-Login-Process-New.md):新版身份认证系统登录过程分析
95 | - [`examples/`](./examples/)
96 | - [`config.ini`](./examples/config.ini):示例脚本的配置文件(一卡通号、密码)
97 | - [`get_postgraduate_lecture_list.py`](./examples/get_postgraduate_lecture_list.py):获取研究生素质讲座列表的示例脚本
98 | - [`get_captcha.py`](./examples/get_captcha.py):获取验证码的示例脚本
99 | - [`get_seu_point.py`](./examples/get_seu_point.py):查询东大信息化中的东豆余额的示例脚本
100 | - [`login_to_dekt.py`](./examples/login_to_dekt.py):登录第二课堂的示例脚本
101 | - [`login_to_ehall.py`](./examples/login_to_ehall.py):登录网上办事服务大厅的示例脚本
102 | - [`encrypt.js`](./encrypt.js):AES 加密函数(来自 [CryptoJS](https://github.com/sytelus/CryptoJS))
103 | - [`requirements.txt`](./requirements.txt):依赖库
104 | - [`seu_auth_mobile.py`](./seu_auth_mobile.py):移动端身份认证登录脚本
105 | - [`seu_auth_newids.py`](./seu_auth_newids.py):旧版身份认证登录脚本
106 | - [`seu_auth.py`](./seu_auth.py):新版身份认证登录脚本
107 | - [`LICENSE`](./LICENSE)
108 | - [`README.md`](./README.md)
109 |
110 | ## 模拟登录脚本说明
111 |
112 | ### 新版
113 |
114 | 在 [seu_auth.py](./seu_auth.py) 中实现了模拟登录[新版身份认证系统](https://auth.seu.edu.cn/dist/#/dist/main/login),流程如下:
115 |
116 | 1. 函数 `get_pub_key()` 从服务器请求 RSA 公钥,存储与公钥相匹配的 Cookie;
117 | 2. 函数 `rsa_encrypt()` 对用户密码进行 RSA 加密;
118 | 3. 函数 `seu_login()` 中调用以上两个函数,向服务器发送用户名(一卡通号)、加密后的密码,以及先前获取到的 Cookie,模拟登录。
119 |
120 | web 请求使用到 [requests](https://pypi.org/project/requests/) 库,RSA 加密使用到 [pycryptodome](https://pypi.org/project/pycryptodome/) 库。
121 |
122 | ### 旧版
123 |
124 | 在 [seu_auth_newids.py](./seu_auth_newids.py) 中实现了模拟登录[旧版身份认证系统](https://newids.seu.edu.cn/authserver/login),流程如下:
125 |
126 | 1. 函数 `get_login_data()` 从登录页面解析出 AES 密钥、Ticket 等信息;
127 | 2. 函数 `aes_encrypt()` 对用户密码进行 AES 加密;
128 | 3. 函数 `seu_login()` 中调用以上两个函数,向服务器发送用户名(一卡通号)、加密后的密码、Ticket 等,模拟登录。
129 |
130 | web 请求使用到 [requests](https://pypi.org/project/requests/) 库,HTML 解析使用到 [BeautifulSoup4](https://pypi.org/project/beautifulsoup4/) 库,AES 加密直接使用到请求返回的 [encrypt.js](./encrypt.js)(来自 [CryptoJS](https://github.com/sytelus/CryptoJS)),JavaScript 运行使用到 [Js2Py](https://pypi.org/project/Js2Py/)。
131 |
132 | ### 移动端
133 |
134 | 在 [seu_auth_mobile.py](./seu_auth_mobile.py) 中实现了模拟登录移动端身份认证系统,流程如下:
135 |
136 | 1. 函数 `get_user_info()` 用于获取已登录用户的身份信息;
137 | 2. 函数 `seu_login()` 向服务器发送用户名、密码以及其他设备信息(可不填),模拟登录,调用上一个函数验证是否成功登录。
138 |
139 | ## 使用示例
140 |
141 | 在 [examples/](./examples/) 中给出了以下几个使用示例,分别是:
142 |
143 | 1. [get_postgraduate_lecture_list.py](./examples/get_postgraduate_lecture_list.py):获取研究生素质讲座列表(新版系统);
144 | 2. [get_captcha.py](./examples/get_captcha.py):获取研究生讲座系统、本科生选课系统的验证码(新版系统);
145 | 3. [login_to_dekt.py](./examples/login_to_dekt.py):登录东南大学第二课堂(新版系统);
146 | 4. [login_to_ehall.py](./examples/login_to_ehall.py):登录东南大学网上办事服务大厅(新版系统);
147 | 5. [query_seu_points.py](./examples/query_seu_points.py):查询东大信息化中的东豆余额(移动端)。
148 |
149 | _(注:括号中内容表示访问该应用所需要经过哪个身份认证系统)_
150 |
151 | 项目 [zhjcreator/fetch_lecture](https://github.com/zhjcreator/fetch_lecture) 使用到新版认证脚本登录研究生素质讲座系统;
152 |
153 | 项目 [Golevka2001/Earn-SEU-Points-Daily](https://github.com/Golevka2001/Earn-SEU-Points_Daily) 使用到移动端认证脚本登录东大信息化 App。
154 |
155 | ## 详细过程分析
156 |
157 | 详细的登录过程分析见 [Wiki](https://github.com/Golevka2001/SEU-Auth/wiki/%E6%96%B0%E7%89%88%E8%BA%AB%E4%BB%BD%E8%AE%A4%E8%AF%81%E7%B3%BB%E7%BB%9F%E7%99%BB%E5%BD%95%E8%BF%87%E7%A8%8B%E5%88%86%E6%9E%90) 页面。
158 |
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1 | # SEU-Auth Wiki -- 新版身份认证系统登录过程分析
2 |
3 | - [SEU-Auth Wiki -- 新版身份认证系统登录过程分析](#seu-auth-wiki----新版身份认证系统登录过程分析)
4 | - [在登录时,我的浏览器做了什么?](#在登录时我的浏览器做了什么)
5 | - [1. dist `GET`](#1-dist-get)
6 | - [2. umi.80c8f8c8.js `GET`](#2-umi80c8f8c8js-get)
7 | - [3. verifyTgt `POST`](#3-verifytgt-post)
8 | - [4. needCaptcha `GET`](#4-needcaptcha-get)
9 | - [5. getChiperKey `POST`](#5-getchiperkey-post)
10 | - [6. casLogin `POST`](#6-caslogin-post)
11 | - [打断点分析 JS 中的加密逻辑](#打断点分析-js-中的加密逻辑)
12 | - [统一身份认证的 RSA 加密用的什么库?](#统一身份认证的-rsa-加密用的什么库)
13 |
14 |
15 | ## 在登录时,我的浏览器做了什么?
16 |
17 | 从访问[统一身份认证页面](https://auth.seu.edu.cn/dist/#/dist/main/login)到完成登录,浏览器共发起了以下请求(过滤掉了图片、样式表等静态资源):
18 |
19 | 
20 |
21 | 下面逐个来查看每个请求的作用。
22 |
23 | ### 1. dist `GET`
24 |
25 |
26 | Response
27 |
28 | ```html
29 |
30 |
31 |
32 |
33 |
37 |
38 |
39 |
42 |
45 |
46 |
47 |
48 |
49 |
50 |
51 |
52 | ```
53 |
54 |
55 | 也就是所看到的登录页面,但可惜的是它是动态加载的,HTML 里屁都没有,全写在 [JS](#2-umi80c8f8c8js) 里了。所以没法用 BeautifulSoup 解析,但是 Selenium 是没问题的,不过准备从直接从网络请求入手,继续来分析。
56 |
57 | ### 2. umi.80c8f8c8.js `GET`
58 |
59 |
60 | Response
61 |
62 | ```javascript
63 | (function(e) {
64 | var t = {};
65 | function n(r) {
66 | if (t[r])
67 | return t[r].exports;
68 | var o = t[r] = {
69 | i: r,
70 | l: !1,
71 | exports: {}
72 | };
73 | return e[r].call(o.exports, o, o.exports, n),
74 | o.l = !0,
75 | o.exports
76 | }
77 |
78 | /**********************
79 | ** Nearly 78k lines **
80 | **********************/
81 | });
82 | ```
83 |
84 |
85 | 这位更是重量级,经过混淆、压缩后的 JS 代码,将近八万行,变量名都是混淆过的,一会儿打断点来分析一下功能和逻辑,先继续往下看请求。
86 |
87 | ### 3. verifyTgt `POST`
88 |
89 |
90 | Payload
91 |
92 | ```json
93 | {}
94 | ```
95 |
96 |
97 |
98 | Response
99 |
100 | ```json
101 | {
102 | "code": 400,
103 | "info": "user not login",
104 | "redirectUrl": null,
105 | "stCookie": null,
106 | "success": false
107 | }
108 | ```
109 |
110 |
111 | 是用来验证 TGT 的有效性的,初次登录时,TGT 是不存在的,所以返回 400;成功登录后,TGT 会被存储在 Cookie 中,从而通过身份验证。暂时没用,下一个。
112 |
113 | ### 4. needCaptcha `GET`
114 |
115 |
116 | Response
117 |
118 | ```json
119 | {
120 | "code": 200,
121 | "info": "不需要验证码",
122 | "maxAge": 0,
123 | "redirectUrl": null,
124 | "success": true,
125 | "tgtCookie": null,
126 | }
127 | ```
128 |
129 |
130 | 判断是否需要用户提交验证码,仍然没用,下一个。
131 |
132 | ### 5. getChiperKey `POST`
133 |
134 |
135 | Payload
136 |
137 | ```json
138 | {}
139 | ```
140 |
141 |
142 |
143 | Response
144 |
145 | ```json
146 | {
147 | "code": 200,
148 | "info": "get public key success",
149 | "publicKey": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqoEr-xxxxxx-hm2GicY9QIDAQAB",
150 | "success": true
151 | }
152 | ```
153 |
154 |
155 | 好了,这个就有用了,这个请求很明显是获取了一个 Base64 编码的公钥,并且能够看出这是个 RSA 公钥(RSA 公钥开头、结尾包含了指数、模数等信息,大多格式相同)。
156 |
157 | 那么公钥是干啥用的呢?肯定是拿来加密的。加密啥呢?那就是用户输入的密码咯。
158 |
159 | 同时在响应头中还带了一个 `Set-Cookie` 字段,值为 `CHIPER_UID=53ed8871c95f49cxxxxxx; ...`,可以猜测 `CHIPER_UID` 是和公钥相匹配的,用于验证有效性。在后来的测试中发现确实如此,若二者不匹配或 Cookie 中不带 `CHIPER_UID`,会返回会话过期的错误。
160 |
161 | ### 6. casLogin `POST`
162 |
163 |
164 | Payload
165 |
166 | ```json
167 | {
168 | "captcha": "",
169 | "loginType": "account",
170 | "mobilePhoneNum": "",
171 | "mobileVerifyCode": "",
172 | "password": "dgnQOyAAQ83Ro7+eW3ZMP1TSaWhItp6+xxxxxx+iHuDKmNyRBO54iBI=",
173 | "rememberMe": false,
174 | "service": "",
175 | "username": "123456789",
176 | "wxBinded": false
177 | }
178 | ```
179 |
180 |
181 |
182 | Response
183 |
184 | ```json
185 | {
186 | "code": 200,
187 | "info": "Authentication Success(no service provided)",
188 | "maxAge": -1,
189 | "redirectUrl": null,
190 | "success": true,
191 | "tgtCookie": "eyJhbGciOiJIUzUxMiIsInR5cCI6IkpXVCJ9.xxxxxx.-Rd3ZGW3szqJT-G41mX84TjtgvS20tM0eLn9i9bwq9GMXTED35DO_TgTi17UpR9F1aQYBw2c8W1T1XrtzHkptA"
192 | }
193 | ```
194 |
195 |
196 | 这就是完成登录的最后一个请求了,可以看到在请求负载中,`username` 和 `password` 字段分别是一卡通号和加密过的密码,其他字段也可以直接直接从变量名看出来,这里就不多说了。
197 |
198 | 响应中可以看到认证成功的信息以及最重要的 `tgtCookie` 字段,这就是我们要的 TGT 了,也就是 [verifyTgt](#3-verifytgt-post) 请求中要验证的那个。
199 |
200 | 
201 |
202 | 至此,登录完成,再来捋一下流程:
203 |
204 | ```mermaid
205 | flowchart LR
206 | A[/"请求公钥\n保存对应的 Cookie"/]
207 | B[/"使用公钥加密用户密码"/]
208 | C[/"提交登录请求\n包含用户名、加密后的密码、Cookie"/]
209 | D[/"成功获取 TGT,完成登录"/]
210 | A-->B
211 | B-->C
212 | C-->D
213 | ```
214 |
215 | ## 打断点分析 JS 中的加密逻辑
216 |
217 | 输入用户名 `123456` 和密码 `qweasd`,启动浏览器调试工具,打开 `umi.80c8f8c8.js`,准备打断点。
218 |
219 | 
220 |
221 | 在前面的分析中已经猜测会使用 RSA 对密码加密,所以搜索 `encrypt`,得到 9 个结果,除去 4 个在字符串中,其他都是函数名以及函数调用,从代码中的一些提示信息也能够看出来这部分确实是 RSA 加密相关。对搜索结果部分都随便打打断点运行一下看看。
222 |
223 | 
224 |
225 | 点击登录按钮后,先停在了这里:
226 |
227 | 
228 |
229 | 在上图中可以分析得出这些信息:
230 |
231 | `var t = kt.username` 是传入的一卡通号;
232 |
233 | `var n = new ot` 创建了一个 RSA 加解密对象的实例,包含了位数、指数等信息;
234 |
235 | `n.SetPublicKey(a.state.publicKey)` 为 RSA 对象设置了公钥;
236 |
237 | `var r = n.encrypt(kt.password)` 调用了某个 `encrypt()` 函数,对传入的密码进行了加密;
238 |
239 | `var o = kt.captcha` 是传入的验证码,不是我们关心的,跳过。
240 |
241 | 下面进入刚才调用的 `encrypt()` 函数内部:
242 |
243 | 
244 |
245 | 可以看到 `e` 就是输入的密码,调用了另一个 RSA Key 对象的 `encrypt()` 函数,这个 `Z()` 呢大概率是个负责格式转换或者格式化的函数。
246 |
247 | 好,继续往下看这另一个 `encrypt()` 函数:
248 |
249 | 
250 |
251 | 这里调用 `Ye()` 执行的应该就是具体的加密流程了,就不再往里细看了,返回 PKCS#1 格式的加密结果,是十六进制的,所以可以猜测上面的 `Z()` 函数作用应该是将十六进制转换为 Base64 编码:
252 |
253 | 
254 |
255 | 最后返回到一开始的调用处,`r` 便是最终得到的 Base64 编码的 RSA 加密结果,也就是 `casLogin` 请求的载荷中的 `password`:
256 |
257 | 
258 |
259 | ## 统一身份认证的 RSA 加密用的什么库?
260 |
261 | 通过简单的搜索和比对,找到了 [jsencrypt](https://github.com/travist/jsencrypt) 这个库,函数的逻辑、功能和前文中的分析是一致的。
262 |
263 | 
264 |
265 | 可以结合上正经变量名、注释再看一遍上面的过程,接下来就可以准备模拟登录了。
266 |
--------------------------------------------------------------------------------
/encrypt.js:
--------------------------------------------------------------------------------
1 | var CryptoJS=CryptoJS||function(u,p){var d={},l=d.lib={},s=function(){},t=l.Base={extend:function(a){s.prototype=this;var c=new s;a&&c.mixIn(a);c.hasOwnProperty("init")||(c.init=function(){c.$super.init.apply(this,arguments)});c.init.prototype=c;c.$super=this;return c},create:function(){var a=this.extend();a.init.apply(a,arguments);return a},init:function(){},mixIn:function(a){for(var c in a)a.hasOwnProperty(c)&&(this[c]=a[c]);a.hasOwnProperty("toString")&&(this.toString=a.toString)},clone:function(){return this.init.prototype.extend(this)}},
2 | r=l.WordArray=t.extend({init:function(a,c){a=this.words=a||[];this.sigBytes=c!=p?c:4*a.length},toString:function(a){return(a||v).stringify(this)},concat:function(a){var c=this.words,e=a.words,j=this.sigBytes;a=a.sigBytes;this.clamp();if(j%4)for(var k=0;k>>2]|=(e[k>>>2]>>>24-8*(k%4)&255)<<24-8*((j+k)%4);else if(65535>>2]=e[k>>>2];else c.push.apply(c,e);this.sigBytes+=a;return this},clamp:function(){var a=this.words,c=this.sigBytes;a[c>>>2]&=4294967295<<
3 | 32-8*(c%4);a.length=u.ceil(c/4)},clone:function(){var a=t.clone.call(this);a.words=this.words.slice(0);return a},random:function(a){for(var c=[],e=0;e>>2]>>>24-8*(j%4)&255;e.push((k>>>4).toString(16));e.push((k&15).toString(16))}return e.join("")},parse:function(a){for(var c=a.length,e=[],j=0;j>>3]|=parseInt(a.substr(j,
4 | 2),16)<<24-4*(j%8);return new r.init(e,c/2)}},b=w.Latin1={stringify:function(a){var c=a.words;a=a.sigBytes;for(var e=[],j=0;j>>2]>>>24-8*(j%4)&255));return e.join("")},parse:function(a){for(var c=a.length,e=[],j=0;j>>2]|=(a.charCodeAt(j)&255)<<24-8*(j%4);return new r.init(e,c)}},x=w.Utf8={stringify:function(a){try{return decodeURIComponent(escape(b.stringify(a)))}catch(c){throw Error("Malformed UTF-8 data");}},parse:function(a){return b.parse(unescape(encodeURIComponent(a)))}},
5 | q=l.BufferedBlockAlgorithm=t.extend({reset:function(){this._data=new r.init;this._nDataBytes=0},_append:function(a){"string"==typeof a&&(a=x.parse(a));this._data.concat(a);this._nDataBytes+=a.sigBytes},_process:function(a){var c=this._data,e=c.words,j=c.sigBytes,k=this.blockSize,b=j/(4*k),b=a?u.ceil(b):u.max((b|0)-this._minBufferSize,0);a=b*k;j=u.min(4*a,j);if(a){for(var q=0;q>>2]>>>24-8*(r%4)&255)<<16|(l[r+1>>>2]>>>24-8*((r+1)%4)&255)<<8|l[r+2>>>2]>>>24-8*((r+2)%4)&255,v=0;4>v&&r+0.75*v