{"id":2590,"date":"2024-03-20T00:43:53","date_gmt":"2024-03-19T16:43:53","guid":{"rendered":"http:\/\/www.ccwifi.cc\/blogs\/?p=2590"},"modified":"2024-03-20T00:43:53","modified_gmt":"2024-03-19T16:43:53","slug":"ctf%e6%94%bb%e7%95%a5ctf%e6%af%94%e8%b5%9b%e4%b8%ad%e5%85%b3%e4%ba%8ezip%e7%9a%841376","status":"publish","type":"post","link":"https:\/\/www.ccwifi.cc\/blogs\/2024\/03\/20\/ctf%e6%94%bb%e7%95%a5ctf%e6%af%94%e8%b5%9b%e4%b8%ad%e5%85%b3%e4%ba%8ezip%e7%9a%841376\/","title":{"rendered":"\u3010CTF \u653b\u7565\u3011CTF\u6bd4\u8d5b\u4e2d\u5173\u4e8ezip\u7684\u603b\u7ed3"},"content":{"rendered":"
\n

\u5728\u7ebfwifi\u8dd1\u5305 \u91d1\u521a\u5305\u8dd1\u5305 cap\u8dd1\u5305 hccapx ewsa\u5728\u7ebf \u5c31\u6765 \u63e1\u624b\u5305\u8dd1\u5305<\/a><\/strong><\/p>\n

\u5404\u4f4d\u597d \u53c8\u89c1\u9762\u4e86 \u6211\u662f\u66f9\u64cd \u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\u65b0\u7684\u6559\u7a0b<\/p>\n

\u5e0c\u671b\u5404\u4f4d\u7ec6\u5fc3\u5b66\u4e60 \u4f4e\u8c03\u7528\u7f51<\/p>\n<\/div>\n

\"\u8dd1\u5305\u5b57\u5178\u4e0b\u8f7dzip\"<\/p>\n

\u9884\u4f30\u7a3f\u8d39\uff1a300RMB \u6295\u7a3f\u65b9\u5f0f\uff1a\u53d1\u9001\u90ae\u4ef6\u81f3linwei#360.cn\uff0c\u6216\u767b\u9646\u7f51\u9875\u7248\u5728\u7ebf\u6295\u7a3f<\/p>\n

\u524d\u8a00<\/p>\n

\u5728CTF\u6bd4\u8d5b\u7684MISC\u548cCRYPTO\u4e2d\uff0c\u7ecf\u5e38\u9700\u8981\u5904\u7406zip\u538b\u7f29\u5305\u3002\u672c\u6587\u5c06\u5bf9zip\u65b9\u9762\u7684\u77e5\u8bc6\u8fdb\u884c\u603b\u7ed3\u3002<\/p>\n

\u672c\u6587\u4e2d\u7528\u5230\u7684\u6240\u6709\u6587\u4ef6\u548c\u5de5\u5177\u90fd\u53ef\u5728\u8fd9\u4e2a\u7f51\u76d8\u4e2d\u627e\u5230\u3002<\/p>\n

\u76ee\u5f55<\/p>\n

\u9690\u5199\u7bc7<\/p>\n

0x01. \u901a\u8fc7\u8fdb\u5236\u8f6c\u6362\u9690\u85cf\u4fe1\u606f<\/p>\n

0x02. \u5728\u56fe\u7247\u4e2d\u9690\u85cf\u538b\u7f29\u5305\uff08\u56fe\u79cd\uff09<\/p>\n

\u52a0\u5bc6\u7bc7<\/p>\n

0x03. \u4f2a\u52a0\u5bc6<\/p>\n

0x04. \u7206\u7834\/\u5b57\u5178\/\u63a9\u7801\u653b\u51fb<\/p>\n

0x05. \u660e\u6587\u653b\u51fb<\/p>\n

0x06. CRC32\u78b0\u649e<\/p>\n

\u683c\u5f0f\u7bc7<\/p>\n

0x07. \u4fee\u6539\u683c\u5f0f<\/p>\n

0x01. \u901a\u8fc7\u8fdb\u5236\u8f6c\u6362\u9690\u85cf\u4fe1\u606f<\/p>\n

\u8fd9\u79cd\u65b9\u6cd5\u6bd4\u8f83\u7b80\u5355\uff0c\u6211\u4eec\u4ee5\u4e00\u9053\u9898\u76ee\u4e3a\u4f8b\u8fdb\u884c\u8bb2\u89e3\uff08\u9898\u76ee\u6765\u81eaISCC 2017 Basic-04\uff09\u3002\u9898\u76ee\u7ed9\u51fa\u4e86\u4e00\u4e2atxt\u6587\u6863\uff0c\u6211\u4eec\u5148\u89c2\u5bdf\u4e00\u4e0b\u6570\u636e\u3002<\/p>\n

\u7ecf\u8fc7\u89c2\u5bdf\uff0c\u6240\u6709\u6570\u636e\u90fd\u572816\u8fdb\u5236\u80fd\u8868\u793a\u7684\u8303\u56f4\u4e4b\u5185\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528\u5341\u516d\u8fdb\u5236\u7f16\u7801\u89e3\u5bc6\u3002\u4e0b\u9762\u662f\u4e00\u4e2aPython\u811a\u672c\u7684\u793a\u4f8b\uff1a<\/p>\n

import binascii\n\ndata = \"...\"\ndecoded_data = binascii.unhexlify(data)\nprint(decoded_data)\n<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\u4e2d\u53ef\u80fd\u5b58\u5728\u5927\u91cf\u4e71\u7801\uff0c\u4f46\u6211\u4eec\u4ecd\u7136\u80fd\u591f\u770b\u5230flag.txt\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u731c\u6d4btxt\u4e2d\u7684\u8fd9\u6bb5\u5b57\u7b26\u662fzip\u5305\u768416\u8fdb\u5236\u8868\u793a\uff08\u540c\u65f6\u5f00\u5934\u7684PK\u4e5f\u6697\u793a\u8fd9\u662f\u4e00\u4e2azip\u5305\uff0cPK\u662fzip\u683c\u5f0f\u53d1\u660e\u8005Phil Katz\u7684\u540d\u79f0\u7f29\u5199\uff0czip\u7684\u524d\u4e24\u4e2a\u5b57\u6bcd\u5c31\u7528\u4e86PK\uff09\u3002<\/p>\n
\u6211\u4eec\u5c06\u8fd9\u6bb5\u5b57\u7b26\u5bfc\u5165\u523016\u8fdb\u5236\u7f16\u8f91\u5668\u4e2d\uff0c\u8fd9\u91cc\u4ee5010editor\u4e3a\u4f8b\u3002\u5bfc\u5165\u540e\u9009\u62e9”Save As”\uff08\u5feb\u6377\u952ectrl + shift + s\uff09\uff0c\u7ed9\u65b0\u6587\u4ef6\u547d\u540d\u65f6\u52a0\u4e0a\u540e\u7f00.zip\uff0c\u4fdd\u5b58\u540e\u53d1\u73b0zip\u6587\u4ef6\u662f\u6b63\u5e38\u7684\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8bc1\u660e\u4e86\u8fd9\u4e2a\u601d\u8def\u662f\u6b63\u786e\u7684\u3002<\/p>\n
\u53e6\u5916\uff0c\u9664\u4e8616\u8fdb\u5236\u7684\u7f16\u7801\u8f6c\u6362\uff0c\u6709\u65f6\u8fd8\u4f1a\u9047\u52302\u8fdb\u5236\u7f16\u7801\u7684\u8f6c\u6362\uff0c\u601d\u8def\u76f8\u540c\uff0c\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n
0x02. \u5728\u56fe\u7247\u4e2d\u9690\u85cf\u538b\u7f29\u5305\uff08\u56fe\u79cd\uff09<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u662f\u6700\u5e38\u89c1\u7684zip\u9690\u85cf\u65b9\u5f0f\uff0c\u591a\u7528\u4e8e\u5728\u4e00\u5f20\u56fe\u7247\u4e2d\u9690\u85cf\u4e00\u4e2a\u538b\u7f29\u5305\u3002\u539f\u7406\u662f\uff1a\u4ee5jpg\u683c\u5f0f\u7684\u56fe\u7247\u4e3a\u4f8b\uff0c\u4e00\u4e2a\u5b8c\u6574\u7684JPG\u6587\u4ef6\u7531FF D8\u5f00\u5934\uff0cFF D9\u7ed3\u5c3e\uff0c\u56fe\u7247\u6d4f\u89c8\u5668\u4f1a\u5ffd\u7565FF D9\u4ee5\u540e\u7684\u5185\u5bb9\uff0c\u56e0\u6b64\u53ef\u4ee5\u5728JPG\u6587\u4ef6\u4e2d\u52a0\u5165\u5176\u4ed6\u6587\u4ef6\u3002<\/p>\n
\u6211\u4eec\u4ee5\u4e00\u9053\u9898\u76ee\u4e3a\u4f8b\u8fdb\u884c\u8bb2\u89e3\uff08ISCC 2017 Basic-07\uff09\u3002\u5bf9\u4e8e\u8fd9\u79cd\u9690\u5199\uff0c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u4f7f\u7528Kali\u4e0b\u7684binwalk\u8fdb\u884c\u68c0\u6d4b\u3002\u5728\u7ec8\u7aef\u4e2d\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
binwalk \u56fe\u7247\u540d\n<\/code><\/pre>\n
\u68c0\u6d4b\u7ed3\u679c\u4f1a\u663e\u793a\u56fe\u7247\u4e2d\u5b58\u5728\u538b\u7f29\u5305\u3002<\/p>\n
\u5206\u79bb\u8fd9\u4e2a\u538b\u7f29\u5305\u6709\u81f3\u5c11\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n
    \n
  1. \u5229\u7528Linux\u4e0b\u7684foremost\u5de5\u5177\u3002\u5728\u7ec8\u7aef\u4e2d\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/li>\n<\/ol>\n
    foremost \u56fe\u7247\u540d\n<\/code><\/pre>\n
    foremost\u9ed8\u8ba4\u7684\u8f93\u51fa\u6587\u4ef6\u5939\u4e3aoutput\uff0c\u5728\u8fd9\u4e2a\u6587\u4ef6\u5939\u4e2d\u53ef\u4ee5\u627e\u5230\u5206\u79bb\u51fa\u7684zip\u6587\u4ef6\u3002<\/p>\n
      \n
    1. \u66f4\u7b80\u5355\u7c97\u66b4\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u5c06\u56fe\u7247\u7684\u540e\u7f00\u6539\u4e3a.zip\uff0c\u7136\u540e\u89e3\u538b\u5373\u53ef\uff08\u8fd9\u79cd\u65b9\u6cd5\u867d\u7136\u7b80\u5355\u5feb\u901f\uff0c\u4f46\u5982\u679c\u9690\u5199\u4e86\u591a\u4e2a\u6587\u4ef6\u65f6\u53ef\u80fd\u4f1a\u5931\u8d25\uff09\u3002<\/li>\n<\/ol>\n
      \u53e6\u5916\uff0c\u672c\u9898\u7684\u540e\u7eed\u6b65\u9aa4\u4e3a\u6784\u9020\u5b57\u5178\uff0c\u7206\u7834\u63e1\u624b\u5305\u3002<\/p>\n
      0x03. \u4f2a\u52a0\u5bc6<\/p>\n
      Zip\u4f2a\u52a0\u5bc6\u4e0ezip\u7684\u6587\u4ef6\u683c\u5f0f\u6709\u5173\u3002zip\u4e2d\u6709\u4e00\u4f4d\u662f\u6807\u8bb0\u6587\u4ef6\u662f\u5426\u52a0\u5bc6\u7684\uff0c\u5982\u679c\u66f4\u6539\u4e00\u4e2a\u672a\u52a0\u5bc6zip\u5305\u7684\u52a0\u5bc6\u6807\u8bb0\u4f4d\uff0c\u90a3\u4e48\u5728\u6253\u5f00\u538b\u7f29\u5305\u65f6\u5c31\u4f1a\u63d0\u793a\u8be5\u6587\u4ef6\u662f\u52a0\u5bc6\u7684\u3002<\/p>\n
      \u5bf9\u4e8e\u4f2a\u52a0\u5bc6\uff0c\u6709\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5\uff1a<\/p>\n
        \n
      1. \n
        \u5728Mac OS\u53ca\u90e8\u5206Linux\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u76f4\u63a5\u6253\u5f00\u4f2a\u52a0\u5bc6\u7684zip\u538b\u7f29\u5305\u3002<\/p>\n<\/li>\n
      2. \n
        \u4f7f\u7528\u68c0\u6d4b\u4f2a\u52a0\u5bc6\u7684ZipCenOp.jar\u3002\u89e3\u5bc6\u540e\u5982\u679c\u80fd\u6210\u529f\u6253\u5f00zip\u5305\uff0c\u5219\u662f\u4f2a\u52a0\u5bc6\uff0c\u5426\u5219\u8bf4\u660e\u601d\u8def\u9519\u8bef\u3002<\/p>\n<\/li>\n
      3. \n
        \u4f7f\u752816\u8fdb\u5236\u7f16\u8f91\u5668\u6539\u56de\u52a0\u5bc6\u6807\u8bb0\u4f4d\u3002<\/p>\n<\/li>\n<\/ol>\n
        \u6211\u4eec\u4ee5HBCTF\u7684\u4e00\u9053\u9898\u76ee\u4e3a\u4f8b\u8fdb\u884c\u8bb2\u89e3\u3002\u9898\u76ee\u7ed9\u51fa\u4e86\u4e00\u4e2a\u4f2a\u52a0\u5bc6\u7684zip\u538b\u7f29\u5305\u3002\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u4ee5\u4e0b\u4e09\u79cd\u65b9\u6cd5\u6765\u89e3\u9898\uff1a<\/p>\n
          \n
        1. \n
          \u7528\u9664Windows\u5916\u7684\u7cfb\u7edf\u76f4\u63a5\u6253\u5f00\u538b\u7f29\u5305\u3002\u5728Mac OS\u548c\u90e8\u5206Linux\u7cfb\u7edf\uff08\u5982Kali\uff09\u4e2d\uff0c\u53f3\u952e\u89e3\u538b\u53ef\u76f4\u63a5\u6253\u5f00\u4f2a\u52a0\u5bc6\u7684zip\u538b\u7f29\u5305\u3002<\/p>\n<\/li>\n
        2. \n
          \u4f7f\u7528ZipCenOp.jar\uff08\u9700\u8981Java\u73af\u5883\uff09\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u89e3\u5bc6\u538b\u7f29\u5305\uff1a<\/p>\n<\/li>\n<\/ol>\n
          java -jar ZipCenOp.jar -d \u538b\u7f29\u5305\u540d\n<\/code><\/pre>\n
          \u89e3\u5bc6\u540e\u7684\u538b\u7f29\u5305\u53ef\u4ee5\u76f4\u63a5\u6253\u5f00\u3002\u8fd9\u79cd\u65b9\u6cd5\u6700\u4e3a\u4fbf\u6377\u3002<\/p>\n
            \n
          1. \u752816\u8fdb\u5236\u7f16\u8f91\u5668\u4fee\u6539\u52a0\u5bc6\u6807\u8bb0\u4f4d\u3002\u6253\u5f00\u538b\u7f29\u5305\uff0c\u627e\u5230\u52a0\u5bc6\u6807\u8bb0\u4f4d\uff0c\u5c06\u5176\u4fee\u6539\u4e3a00\uff0c\u4fdd\u5b58\uff0c\u5373\u53ef\u6253\u5f00\u538b\u7f29\u5305\u3002<\/li>\n<\/ol>\n
            0x04. \u7206\u7834\/\u5b57\u5178\/\u63a9\u7801\u653b\u51fb<\/p>\n
            \u8fd9\u4e09\u79cd\u65b9\u6cd5\u672c\u8d28\u4e0a\u90fd\u662f\u9010\u4e2a\u5c1d\u8bd5\u5bc6\u7801\u7684\u65b9\u5f0f\uff0c\u53ea\u4e0d\u8fc7\u5f85\u9009\u5bc6\u7801\u7684\u96c6\u5408\u4e0d\u540c\u3002<\/p>\n
              \n
            1. \n
              \u7206\u7834\uff1a\u9010\u4e2a\u5c1d\u8bd5\u9009\u5b9a\u96c6\u5408\u4e2d\u53ef\u4ee5\u7ec4\u6210\u7684\u6240\u6709\u5bc6\u7801\uff0c\u76f4\u5230\u627e\u5230\u6b63\u786e\u5bc6\u7801\u3002<\/p>\n<\/li>\n
            2. \n
              \u5b57\u5178\uff1a\u5b57\u5178\u653b\u51fb\u7684\u6548\u7387\u6bd4\u7206\u7834\u7a0d\u9ad8\uff0c\u56e0\u4e3a\u5b57\u5178\u4e2d\u5b58\u50a8\u4e86\u5e38\u7528\u7684\u5bc6\u7801\uff0c\u907f\u514d\u4e86\u7206\u7834\u65f6\u6d6a\u8d39\u65f6\u95f4\u3002<\/p>\n<\/li>\n
            3. \n
              \u63a9\u7801\u653b\u51fb\uff1a\u5982\u679c\u5df2\u77e5\u5bc6\u7801\u7684\u67d0\u51e0\u4f4d\uff0c\u5982\u5df2\u77e56\u4f4d\u5bc6\u7801\u7684\u7b2c3\u4f4d\u662fa\uff0c\u90a3\u4e48\u53ef\u4ee5\u6784\u9020??a???\u8fdb\u884c\u63a9\u7801\u653b\u51fb\u3002\u63a9\u7801\u653b\u51fb\u7684\u539f\u7406\u76f8\u5f53\u4e8e\u6784\u9020\u4e86\u7b2c3\u4f4d\u4e3aa\u7684\u5b57\u5178\uff0c\u56e0\u6b64\u6548\u7387\u8f83\u9ad8\u3002<\/p>\n<\/li>\n<\/ol>\n
              \u5bf9\u4e8e\u8fd9\u4e00\u7c7b\u7684zip\u95ee\u9898\uff0c\u63a8\u8350\u4f7f\u7528Windows\u4e0b\u7684AZPR\u5de5\u5177\u3002<\/p>\n
              \u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5bf9\u4e8e\u7206\u7834\uff0c\u6211\u4eec\u4ee5ISCC 2017 Basic-08\u4e3a\u4f8b\u3002\u9009\u5b9a\u66b4\u529b\u653b\u51fb\u3001\u5b57\u7b26\u96c6\u548c\u957f\u5ea6\u540e\u8fdb\u884c\u7206\u7834\u3002\u70b9\u51fb\u5f00\u59cb\uff0c\u8fdb\u884c\u7206\u7834\u3002\u5728\u5f88\u77ed\u7684\u65f6\u95f4\u5185\u627e\u5230\u4e86\u5bc6\u7801\u4e3aBIT\u3002<\/p>\n
              \u53e6\u5916\uff0c\u6b64\u9898\u7684\u540e\u7eed\u6b65\u9aa4\u4e3a\u7b80\u5355\u7684base64\u89e3\u5bc6\uff0c\u7206\u7834\u5728\u5bc6\u7801\u957f\u5ea6\u5c0f\u4e8e6\u4f4d\u65f6\u8f83\u5feb\u3002\u56e0\u6b64\uff0c\u5982\u679c\u57287\u4f4d\u4e4b\u5185\u6ca1\u6709\u7206\u7834\u51fa\u7ed3\u679c\uff0c\u53ef\u4ee5\u8003\u8651\u6362\u4e2a\u65b9\u6cd5\u3002\u6b64\u9898\u7684\u6b63\u89c4\u89e3\u6cd5\u662f\u57f9\u6839\u5bc6\u7801\u7684\u8f6c\u6362\u3002<\/p>\n
              \u5bf9\u4e8e\u5b57\u5178\u653b\u51fb\uff0c\u6211\u4eec\u4ee5\u4e4b\u524d\u7684ISCC 2017 Basic-07\u4e3a\u4f8b\u3002\u4ece\u56fe\u7247\u4e2d\u5206\u79bb\u51fa\u4e00\u4e2a\u52a0\u5bc6\u7684zip\u538b\u7f29\u5305\u540e\uff0c\u8fdb\u884c\u5b57\u5178\u653b\u51fb\u3002\u5b57\u5178\u653b\u51fb\u7684\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u5728\u9009\u62e9\u5408\u9002\u7684\u5b57\u5178\u7684\u60c5\u51b5\u4e0b\uff0c\u7528\u5f88\u77ed\u7684\u65f6\u95f4\u5c31\u80fd\u627e\u5230\u5bc6\u7801\u3002\u7ee7\u7eed\u4ee5\u6b64\u9898\u4e3a\u4f8b\uff0c\u89e3\u538b\u540e\u7684\u538b\u7f29\u5305\u4e2d\u6709\u4e00\u4e2atxt\u6587\u6863\u548c\u4e00\u4e2a\u63e1\u624b\u5305\u3002\u6839\u636etxt\u5185\u5bb9\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u77e5\u63e1\u624b\u5305\u7684\u5bc6\u7801\u4e3aISCC***\u7684\u5f62\u5f0f\uff08<\/em>\u4ee3\u8868\u5927\u5199\u5b57\u6bcd\u6216\u6570\u5b57\uff09\u3002\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u7a0b\u5e8f\u6784\u9020\u5b57\u5178\uff0c\u7136\u540e\u4f7f\u7528aircrack-ng\u6765\u7834\u89e3\u63e1\u624b\u5305\u7684\u5bc6\u7801\u3002<\/p>\n
              \u5bf9\u4e8e\u63a9\u7801\u653b\u51fb\uff0c\u6211\u4eec\u4ee5ISCC 2017 Misc-06\u4e3a\u4f8b\u3002\u9898\u76ee\u7ed9\u51fa\u4e86\u4e00\u4e2ajpg\u56fe\u7247\uff0c\u6211\u4eec\u7528\u4e4b\u524d\u4ecb\u7ecd\u7684\u65b9\u6cd5\u5206\u79bb\u51fa\u52a0\u5bc6\u7684\u538b\u7f29\u5305\u3002\u6839\u636e\u9898\u76ee\u63d0\u793a\uff0c\u6211\u4eec\u6784\u9020????LiHua\u7684\u63a9\u7801\u8fdb\u884c\u653b\u51fb\u3002\u653b\u51fb\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u53ea\u8017\u8d39\u4e86\u5f88\u5c11\u7684\u65f6\u95f4\u5c31\u627e\u5230\u4e86\u5bc6\u7801\u3002<\/p>\n
              0x05. \u660e\u6587\u653b\u51fb<\/p>\n
              \u660e\u6587\u653b\u51fb\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u653b\u51fb\u624b\u6bb5\u3002\u5927\u81f4\u539f\u7406\u662f\uff0c\u5f53\u4f60\u4e0d\u77e5\u9053\u4e00\u4e2azip\u7684\u5bc6\u7801\uff0c\u4f46\u662f\u4f60\u6709zip\u4e2d\u7684\u4e00\u4e2a\u5df2\u77e5\u6587\u4ef6\uff08\u6587\u4ef6\u5927\u5c0f\u8981\u5927\u4e8e12\u5b57\u8282\uff09\u65f6\uff0c\u53ef\u4ee5\u5229\u7528\u5df2\u77e5\u6587\u4ef6\u6765\u627e\u5230\u52a0\u5bc6\u5bc6\u94a5\uff0c\u7136\u540e\u7528\u5bc6\u94a5\u6765\u89e3\u9501\u5176\u4ed6\u52a0\u5bc6\u6587\u4ef6\u3002\u66f4\u8be6\u7ec6\u7684\u539f\u7406\u8bf7\u8bfb\u8005\u81ea\u884c\u641c\u7d22\u3002<\/p>\n
              \u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u5df2\u77e5\u660e\u6587\u653b\u51fb.zip\u4e2d\u5b58\u5728\u7684\u6587\u4ef6\u660e\u6587.txt\u3002\u6211\u4eec\u5c06\u660e\u6587.txt\u538b\u7f29\uff0c\u9700\u8981\u5224\u65ad\u538b\u7f29\u540e\u7684CRC32\u662f\u5426\u4e0e\u52a0\u5bc6\u6587\u4ef6\u4e2d\u7684\u4e00\u81f4\u3002\u5982\u679c\u4e0d\u4e00\u81f4\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u4f7f\u7528\u5176\u4ed6\u538b\u7f29\u5de5\u5177\u3002<\/p>\n
              0x06. CRC32\u78b0\u649e<\/p>\n
              CRC32\u662f\u4e00\u79cd\u5197\u4f59\u6821\u9a8c\u7801\uff0c\u5b83\u4f1a\u4ea7\u751f\u4e00\u4e2a32\u4f4d\u7684\u6821\u9a8c\u503c\u3002\u5728\u4ea7\u751fCRC32\u65f6\uff0c\u6e90\u6570\u636e\u5757\u7684\u6bcf\u4e00\u4f4d\u90fd\u53c2\u4e0e\u4e86\u8fd0\u7b97\uff0c\u56e0\u6b64\u5373\u4f7f\u6570\u636e\u5757\u4e2d\u53ea\u6709\u4e00\u4f4d\u53d1\u751f\u6539\u53d8\uff0c\u4e5f\u4f1a\u5f97\u5230\u4e0d\u540c\u7684CRC32\u503c\u3002\u5229\u7528\u8fd9\u4e2a\u539f\u7406\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u7206\u7834\u51fa\u52a0\u5bc6\u6587\u4ef6\u7684\u5185\u5bb9\u3002<\/p>\n
              \u6211\u4eec\u4ee5\u4e4b\u524d\u63d0\u5230\u7684HBCTF\u4f2a\u52a0\u5bc6\u9898\u76ee\u4e3a\u4f8b\u3002\u6253\u5f00\u538b\u7f29\u5305\uff0c\u53ef\u4ee5\u770b\u5230\u538b\u7f29\u6587\u4ef6flag6\u4f4d\u6570\u7684CRC32\u503c\u4e3a0x9c4d9a5d\u3002\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u4e00\u4e2a\u811a\u672c\u6765\u8fdb\u884c\u78b0\u649e\u653b\u51fb\u3002<\/p>\n
              \u8981\u7279\u522b\u6ce8\u610f\uff0c\u5728Python 2.x\u7684\u7248\u672c\u4e2d\uff0cbinascii.crc32\u8ba1\u7b97\u51fa\u7684CRC\u503c\u57df\u4e3a[-2^31, 2^31-1]\u4e4b\u95f4\u7684\u6709\u7b26\u53f7\u6574\u6570\u3002\u4e3a\u4e86\u4e0e\u4e00\u822cCRC\u7ed3\u679c\u4f5c\u6bd4\u5bf9\uff0c\u9700\u8981\u5c06\u5176\u8f6c\u4e3a\u65e0\u7b26\u53f7\u6574\u6570\uff0c\u6240\u4ee5\u52a0\u4e0a& 0xffffffff\u6765\u8fdb\u884c\u8f6c\u6362\u3002\u5982\u679c\u662fPython 3.x\u7684\u7248\u672c\uff0c\u5176\u8ba1\u7b97\u7ed3\u679c\u4e3a[0, 2^32-1]\u95f4\u7684\u65e0\u7b26\u53f7\u6574\u6570\uff0c\u56e0\u6b64\u4e0d\u9700\u8981\u989d\u5916\u52a0\u4e0a& 0xffffffff\u3002<\/p>\n
              CRC\u78b0\u649e\u7684\u811a\u672c\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff0c\u5373\u4e3a\u538b\u7f29\u6587\u4ef6\u7684\u5185\u5bb9\u3002<\/p>\n
              \u518d\u4e3e\u4e00\u4e2abugku\u4e2d\u7684\u4f8b\u5b50\uff0c\u4e0b\u8f7d\u4e0b\u6765\u7684\u6587\u4ef6\u662f68\u4e2a\u538b\u7f29\u5305\uff0c\u5e76\u4e14\u6839\u636ebinwalk\u7684\u68c0\u67e5\u7ed3\u679c\uff0c\u6bcf\u4e2a\u538b\u7f29\u5305\u91cc\u90fd\u6709\u4e00\u4e2a\u5927\u5c0f\u4e3a4\u4e2a\u5b57\u8282\uff0c\u540d\u4e3aout.txt\u7684\u538b\u7f29\u6587\u4ef6\u3002\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u4ee5\u4e0b\u811a\u672c\u6765\u78b0\u649e\u51fa\u6240\u6709\u538b\u7f29\u5305\u4e2d\u7684\u6570\u636e\u3002<\/p>\n
              \u6b64\u9898\u8f83\u4e3a\u7e41\u7410\uff0c\u540e\u7eed\u6b65\u9aa4\u4e0d\u518d\u5c55\u5f00\u3002\u53e6\u5916\uff0c\u9650\u4e8eCPU\u7684\u80fd\u529b\uff0cCRC\u78b0\u649e\u53ea\u80fd\u7528\u4e8e\u538b\u7f29\u6587\u4ef6\u8f83\u5c0f\u7684\u60c5\u51b5\u3002<\/p>\n
              0x07. \u4fee\u6539\u683c\u5f0f<\/p>\n
              \u8fd9\u79cd\u60c5\u51b5\u82b1\u6837\u8f83\u591a\uff0c\u96be\u4ee5\u505a\u4e00\u4e2a\u8be6\u7ec6\u7684\u603b\u7ed3\uff0c\u56e0\u6b64\u53ea\u5217\u4e3e\u6700\u5e38\u89c1\u7684\u7f3a\u5c11\u6587\u4ef6\u5934\u6216\u6587\u4ef6\u5c3e\u3002<\/p>\n
              \u6211\u4eec\u653e\u4e00\u4e2a\u8bb2\u89e3zip\u6587\u4ef6\u683c\u5f0f\u7684\u94fe\u63a5\uff0c\u901a\u8fc7\u5bf9zip\u6587\u4ef6\u683c\u5f0f\u7684\u4e86\u89e3\uff0c\u53ef\u4ee5\u89e3\u91ca\u4e4b\u524d\u4f2a\u52a0\u5bc6\u7684\u95ee\u9898\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u5bf9\u7f3a\u5c11\u6587\u4ef6\u5934\u6216\u6587\u4ef6\u5c3e\u6709\u66f4\u76f4\u89c2\u7684\u8ba4\u8bc6\u3002<\/p>\n
              \u5982\u4e0a\u4e3a\u6b63\u5e38zip\u3001\u7f3a\u5934zip\u548c\u7f3a\u5c3ezip\u7684binwalk\u626b\u63cf\u7ed3\u679c\u3002\u6839\u636e\u626b\u63cf\u7ed3\u679c\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u752816\u8fdb\u5236\u7f16\u8f91\u5668\u6dfb\u52a0\u6587\u4ef6\u5934\u6216\u6587\u4ef6\u5c3e\uff0c\u5373\u53ef\u4fee\u590dzip\u6587\u4ef6\u3002<\/p>\n
              \u603b\u7ed3<\/p>\n
              Zip\u4e0d\u4ec5\u662f\u6211\u4eec\u751f\u6d3b\u4e2d\u5e38\u7528\u7684\u4e00\u79cd\u6587\u4ef6\u683c\u5f0f\uff0c\u4e5f\u7ecf\u5e38\u5728CTF\u6bd4\u8d5b\u4e2d\u9047\u5230\u3002\u672c\u6587\u5bf9CTF\u4e2dzip\u7684\u76f8\u5173\u77e5\u8bc6\u8fdb\u884c\u4e86\u603b\u7ed3\uff0c\u5e0c\u671b\u5bf9\u8bfb\u8005\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
              \u3010CTF \u653b\u7565\u3011CTF\u6bd4\u8d5b\u4e2d\u5173\u4e8ezip\u7684\u603b\u7ed3\u9884\u4f30\u7a3f\u8d39\uff1a300RMB\u6295\u7a3f\u65b9\u5f0f\uff1a\u53d1\u9001\u90ae\u4ef6\u81f3linwei#360.cn\uff0c\u6216\u767b\u9646\u7f51\u9875\u7248\u5728\u7ebf\u6295\u7a3f\u524d\u8a00\u5728CTF\u6bd4\u8d5b\u7684MISC\u548cCRYPTO\u4e2d\uff0c\u7ecf\u5e38\u8981\u548czip\u538b\u7f29\u5305\u6253\u4ea4\u9053\uff0c\u8fd9\u91cc\u505a\u4e00\u4e2azip\u65b9\u9762\u7684\u603b\u7ed3\u3002<\/p>\n","protected":false},"author":1,"featured_media":2591,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"class_list":["post-2590","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/posts\/2590","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/comments?post=2590"}],"version-history":[{"count":0,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/posts\/2590\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/media\/2591"}],"wp:attachment":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/media?parent=2590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/categories?post=2590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/tags?post=2590"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/topic?post=2590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}