101 lines
2.9 KiB
HTML
101 lines
2.9 KiB
HTML
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<html>
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<head> <meta http-equiv="content-type" content="text/html;charset=UTF-8">
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<title>NJIT 802.1X Client -- Documents</title>
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</head>
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<body>
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<pre>
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===============================================================================
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南京工程学院 - 校园网802.1X客户端 - 项目文档
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-------------------------------------------------------------------------------
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参考AGanNo2的相关介绍，在此将版本号加密/解密步骤整理如下。
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[H3C版本号加密流程]
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选取任意32位随机数，并生成字符串形式的密钥
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uint32_t randam;
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char key[8+1];
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sprintf(key, "%08x", randam);
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加密步骤：
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char version[16]="EN V2.40-0335";
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｜
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｜ 异或
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｜《———————— key[] (例如取randam=0x12345678，则字符串key[]为"12345678")
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｜
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version[16]: "LK%W3+19$5624 "
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｜
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｜ 将整数randam附加到version[16]之后，组成20字节
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｜《—————————————————————————————————————————————
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｜
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version[20]: "LK%W3+19$5624 4Vx"
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｜
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｜ 异或
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｜《——————— "HuaWei3COM1X"
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｜
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version[20]: "; <s23IJ%?C "
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｜
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｜ 按照Base64格式编码，输出可读的ASCII字符串
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｜《——————————————————————————————————————————
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｜
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最后生成的28字节版本号为：
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Rw0tZQEjdzIzSUolP0MNOyA8EHM=
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[“异或”运算的细节]
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1、每个密钥被按正序、逆序使用两遍
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2、密钥会被扩展为与待加密数据长度相同
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使用密钥key[]="12345678"加密"EN V2.40-0335"：
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"EN V2.40-0335 "
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"1234567812345678"
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XOR "8765432187654321"
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————————————————————————————————
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"LK%W3+19$5624 "
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使用密钥"HuaWei3COM1X"加密"LK%W3+19$5624 4Vx"：
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"LK%W3+19$5624 4Vx"
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"HuaWei3COM1XHuaWei3C"
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XOR "C3ieWauHX1MOC3ieWauH"
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————————————————————————————————
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"; <s23IJ%?C "
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[H3C认证服务器解读版本号流程]
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28字节版本号秘文
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｜
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｜ Base64解码
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｜《—————————————
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｜
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verison[20]
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｜
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｜ 异或
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｜《———————— "HuaWei3COM1X"
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｜
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version[20]
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｜ \
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｜ \
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前16字节 取出末尾4字节，即randam
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｜ ｜
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｜ ｜
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｜ ｜
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｜ 异或 ｜
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｜《—————— key[]
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｜
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｜
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还原成版本号字符串"EN V2.40-0335"
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===============================================================================
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</pre>
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</body>
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</html>
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