{"id":1685,"date":"2021-12-14T22:41:19","date_gmt":"2021-12-14T14:41:19","guid":{"rendered":"https:\/\/flandre-scarlet.moe\/blog\/?p=1685"},"modified":"2021-12-15T21:23:32","modified_gmt":"2021-12-15T13:23:32","slug":"zip-%e6%98%8e%e6%96%87%e6%94%bb%e5%87%bb%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/flandre-scarlet.moe\/blog\/1685\/","title":{"rendered":"ZIP \u660e\u6587\u653b\u51fb\u539f\u7406"},"content":{"rendered":"\n

\u5728\u770b CTF \u65f6\u53d1\u73b0\u4e86 zip \u660e\u6587\u653b\u51fb\u7684\u653b\u51fb\u65b9\u5f0f\uff0c\u7136\u800c\u4e3e\u7684\u4f8b\u5b50\u91cc\u57fa\u672c\u90fd\u662f\u4f7f\u7528\u5de5\u5177\u2014\u2014\u4e5f\u5c31\u662f ARCHPR \u7b80\u5355\u5b8c\u6210\u7834\u89e3\uff0c\u8f6c\u800c\u8fdb\u884c\u4e0b\u4e00\u6b65\u64cd\u4f5c\uff0c\u5bf9\u660e\u6587\u653b\u51fb\u672c\u8eab\u5e76\u6ca1\u6709\u505a\u66f4\u591a\u89e3\u91ca\u3002\u672c\u60f3\u770b\u770b ARCHPR \u7684\u660e\u6587\u653b\u51fb\u5b9e\u73b0\u7684\uff0c\u7ed3\u679c\u53d1\u73b0\u8fd9\u4e1c\u897f\u662f\u5546\u4e1a\u8f6f\u4ef6\u2026\u2026\u4e8e\u662f\u5f00\u59cb\u627e\u5176\u4ed6\u8d44\u6599\u3002<\/p>\n

\u7b80\u5355\u641c\u4e86\u4e00\u5708\u53d1\u73b0\u8fd9\u79cd\u653b\u51fb\u662f\u57fa\u4e8e Biham \u548c Kocher \u5728 94 \u5e74\u53d1\u8868\u7684\u8bba\u6587\u300aA Known Plaintext Attack on the PKZIP Stream Cipher\u300b<\/a>\u5b9e\u73b0\u7684\u3002<\/p>\n

\u660e\u6587\u653b\u51fb\u4e3b\u8981\u5229\u7528\u5927\u4e8e 12 \u5b57\u8282\u7684\u4e00\u6bb5\u5df2\u77e5\u660e\u6587\u6570\u636e\u8fdb\u884c\u653b\u51fb\uff0c\u4ece\u800c\u83b7\u53d6\u6574\u4e2a\u52a0\u5bc6\u6587\u6863\u7684\u6570\u636e\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u6211\u624b\u91cc\u6709\u4e00\u4e2a\u672a\u77e5\u5bc6\u7801\u7684\u538b\u7f29\u5305\u548c\u538b\u7f29\u5305\u5185\u67d0\u4e2a\u6587\u4ef6\u7684\u4e00\u90e8\u5206\u660e\u6587\uff08\u4e0d\u4e00\u5b9a\u975e\u8981\u4ece\u5934\u5f00\u59cb\uff0c\u80fd\u786e\u5b9a\u504f\u79fb\u5c31\u884c\uff09\uff0c\u90a3\u4e48\u6211\u5c31\u53ef\u4ee5\u901a\u8fc7\u8fd9\u79cd\u653b\u51fb\u6765\u89e3\u5f00\u6574\u4e2a\u538b\u7f29\u5305\u3002\u6bd4\u5982\u538b\u7f29\u5305\u91cc\u6709\u4e00\u4e2a\u5e38\u89c1\u7684 license \u6587\u4ef6\uff0c\u6216\u8005\u662f\u67d0\u4e2a\u5e38\u7528\u7684 dll \u5e93\uff0c\u6216\u8005\u662f\u5e26\u6709\u56fa\u5b9a\u5934\u90e8\u7684\u6587\u4ef6\uff08\u6bd4\u5982 xml\u3001exe\u3001png \u7b49\u5bb9\u6613\u63a8\u5bfc\u51fa\u539f\u59cb\u5185\u5bb9\u7684\u6587\u4ef6\uff09\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u8fd0\u7528\u8fd9\u79cd\u653b\u51fb\u3002\u5f53\u7136\uff0c\u524d\u63d0\u662f\u538b\u7f29\u5305\u8981\u7528 ZipCrypto \u52a0\u5bc6\u3002
\n<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\u4ece\u660e\u6587\u5230\u5bc6\u6587\u7684\u8fd9\u4e2a\u6d41\u7a0b\u4e2d\u6211\u4eec\u6709\u4e86\u5934\u5c3e\u4e24\u7aef\u7684\u6570\u636e\uff0c\u518d\u5229\u7528\u52a0\u5bc6\u7b97\u6cd5\u4e2d\u7684\u5f31\u70b9\u8fd8\u539f\u51fa\u52a0\u5bc6\u5bc6\u94a5\uff0c\u4ece\u800c\u89e3\u5bc6\u6574\u4e2a\u538b\u7f29\u5305\uff08\u540c\u4e00\u4e2a\u538b\u7f29\u5305\u7684\u6587\u4ef6\u90fd\u662f\u7528\u540c\u4e00\u4e2a\u5bc6\u94a5\u52a0\u5bc6\uff09\u3002\u4f46\u662f\u4ecd\u7136\u8981\u6ce8\u610f\uff0c\u5982\u679c\u6587\u4ef6\u5728\u52a0\u5bc6\u524d\u7ecf\u8fc7\u4e86\u538b\u7f29\uff0c\u52a0\u5bc6\u7b97\u6cd5\u7684\u8f93\u5165\u4e0d\u518d\u662f\u6211\u4eec\u6240\u77e5\u9053\u7684\u660e\u6587\u800c\u662f\u538b\u7f29\u540e\u7684\u6570\u636e\uff0c\u660e\u6587\u653b\u51fb\u4f1a\u5931\u8d25\uff08\u5728\u538b\u7f29\u5305\u91cc\u67e5\u770b\u6587\u4ef6\u7684\u5c5e\u6027\u53ef\u4ee5\u770b\u5230\u538b\u7f29\u65b9\u5f0f\uff0c\u6bd4\u5982\u201cZipCrypto Deflate\u201d\u5c31\u662f\u52a0\u5bc6\u538b\u7f29\uff0c\u201cZipCrypto Store\u201d\u5c31\u662f\u52a0\u5bc6\u50a8\u5b58\uff09\u3002\u8fd9\u5c31\u591a\u4e86\u627e\u51fa\u660e\u6587\u538b\u7f29\u540e\u7684\u6570\u636e\u8fd9\u6837\u4e00\u4e2a\u989d\u5916\u6b65\u9aa4\u3002<\/p>\n

ZipCrypto<\/h2>\n

\u8981\u60f3\u653b\u51fb\u9996\u5148\u9700\u8981\u77e5\u9053 ZipCrypto \u7684\u52a0\u5bc6\u65b9\u5f0f\u3002\u8fd9\u4e2a\u52a0\u5bc6\u7b97\u6cd5\u662f\u9762\u5411\u5b57\u8282\u6d41\u7684\uff08\u800c\u73b0\u4ee3\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5\u662f\u5bf9\u4e00\u4e2a\u5206\u7ec4\u8fdb\u884c\u52a0\u5bc6\uff09\uff0c\u5b83\u5185\u90e8\u4f7f\u7528\u4e86 3 \u4e2a 32 \u6bd4\u7279\u7684\u6574\u6570\u6765\u8868\u793a\u5bc6\u94a5\uff0c\u53ef\u4ee5\u5c06\u5b83\u4eec\u79f0\u4e3a key0\uff0ckey1 \u548c key2\u3002\u901a\u5e38\u6211\u4eec\u5728\u6253\u5305\u6587\u4ef6\u65f6\u8f93\u5165\u7684\u5bc6\u7801\u4f1a\u88ab\u8f6c\u6362\u6210\u8fd9 3 \u4e2a dword\u3002\u7b97\u6cd5\u57fa\u672c\u5c31\u662f\u7528\u4e00\u4e2a\u5faa\u73af\u6765\u52a0\u5bc6\u6570\u636e\uff0c\u52a0\u5bc6\u51fd\u6570\u8bb0\u4e3a UpdateKeys\uff0ccpp \u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

\r\n\/\/ p \u662f\u7528\u6765\u66f4\u65b0\u5185\u90e8 key \u7684\u660e\u6587\r\n\/\/ lsb\u3001msb \u5206\u522b\u8868\u793a\u53d6 dword \u7684\u6700\u4f4e\u548c\u6700\u9ad8\u5b57\u8282\uff08\u4e0d\u662f\u4f4d\uff09\r\nvoid PKCipher::UpdateKeys(uint8_t p) {\r\n  k0 = crc::Crc32(k0, p);\r\n  k1 = (k1 + crc::lsb(k0)) * 134775813 + 1;    \/\/ 134775813 \u662f magic number\r\n  k2 = crc::Crc32(k2, crc::msb(k1));\r\n}\r\nuint8_t PKCipher::GetK3() {\r\n  uint16_t tmp = k2 | 3;\r\n  return crc::lsb((tmp * (tmp ^ 1)) >> 8);\r\n}\r\nvoid PKCipher::Encrypt(std::vector<uint8_t>& data) {\r\n  for (uint8_t& p : data) {\r\n    uint8_t c = p ^ GetK3();\r\n    UpdateKeys(p);\r\n    p = c;\r\n  }\r\n}\r\n<\/pre>\n
UpdateKeys \u4ec5\u4ec5\u662f\u66f4\u65b0\u4e86\u5185\u90e8 key\uff0c\u771f\u6b63\u5bf9\u660e\u6587\u8fdb\u884c\u52a0\u5bc6\u7528\u7684\u662f\u4ece key2 \u6d3e\u751f\u51fa\u6765\u7684 16 \u6bd4\u7279\u7684 key3\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u4e0d\u4ec5 key3 \u53ea\u6709 16 \u6bd4\u7279\u957f\uff0c\u5b83\u7684\u4f4e\u4e24\u4f4d\u56e0\u4e3a\u548c 3 \u505a\u4e86\u4f4d\u4e0e\u64cd\u4f5c\u6240\u4ee5\u5fc5\u7136\u662f 1\uff0c\u4f7f\u5f97 key3 \u7684\u53d6\u503c\u8303\u56f4\u7f29\u5c0f\u5230 \\(2^{14}\\)\uff0c\u8fd9\u5c31\u6709\u4e86\u53cd\u63a8\u7684\u57fa\u7840\u3002<\/p>\n
\u660e\u6587\u653b\u51fb<\/h2>\n
\u5148\u5c06\u660e\u6587\u7684\u5e8f\u5217\u8bb0\u4e3a P\uff0c\u4e0b\u6807\u4ece 1 \u5230 n\uff0c\u8fd9\u91cc\u7684 \\(P_1\\) \u662f\u6307\u5e8f\u5217\u4e2d\u7684\u7b2c\u4e00\u4e2a\uff0c\u5e76\u4e0d\u4e00\u5b9a\u4ee3\u8868\u8fd9\u662f\u7b2c\u4e00\u4e2a\u660e\u6587\u5b57\u8282\u3002\u540c\u6837\u6709\u5bc6\u6587\u5e8f\u5217\u8bb0\u4e3a \\(C_{1 \\ldots n}\\)\uff0c\u5bc6\u94a5\u5e8f\u5217 \\(Key0_{1 \\ldots n}\\)\uff0c\\(Key1_{1 \\ldots n}\\) \u548c \\(Key2_{1 \\ldots n}\\)\u3002\u6839\u636e<\/p>\n
uint8_t c = p ^ GetK3();<\/pre>\n
\u6211\u4eec\u9996\u5148\u5c31\u80fd\u5f97\u5230\u76f8\u5e94\u7684 \\(Key3_{1 \\ldots n}\\) \u5e8f\u5217\u3002<\/p>\n
Key2<\/h2>\n
Key3 \u53ea\u53d7 Key2 \u7684 [2..16) \u4f4d\u5f71\u54cd\uff0c\u6240\u4ee5 Key2 \u4e00\u5171\u6709 \\(2^{14}=16384\\) \u4e2a\u53ef\u80fd\uff0c\u800c Key3 \u53ea\u6709\u4e00\u4e2a\u5b57\u8282\uff0c\u5373 256 \u4e2a\u4e0d\u540c\u7684\u503c\uff0c\u90a3\u4e48\u53cd\u8fc7\u6765\u4ece\u4e00\u4e2a\u5df2\u77e5\u7684 Key3 \u5e73\u5747\u53ef\u4ee5\u6620\u5c04\u5230 \\({16384 \\over 256}=64\\) \u4e2a\u53ef\u80fd\u7684 Key2[2..16)\uff0c\u5269\u4e0b\u7684\u6bd4\u7279\u4f4d\u4ecd\u7136\u672a\u77e5\u3002
\n\u7531 crc32 \u7684\u9006\u8fd0\u7b97\u53ef\u4ee5\u5f97\u5230 $$\\begin{align} Key2_i & = crc32^{-1}(Key2_{i+1}, MSB(Key1_{i+1})) \\\\\\\\ & = (Key2_{i+1} << 8) \\bigoplus crcinvtab[MSB(Key2_{i+1})] \\bigoplus MSB(Key1_{i+1}) \\end{align}$$\n\u6765\u770b\u516c\u5f0f\u53f3\u8fb9\u7684\u4e09\u4e2a\u90e8\u5206\uff1a\n\n
    \n
  1. \u5728 \\(Key2_{i+1}\\) << 8 \u4e2d\u5b83\u7684\u4f4e 8 \u4f4d\u603b\u662f 0\uff0c\u800c Key2 \u7684\u6700\u4f4e\u4e24\u4f4d\u5728 Key3 \u9006\u63a8\u65f6\u4e5f\u6ca1\u6709\u8003\u8651\u5728\u5185\uff0c\u6240\u4ee5\u8ba1\u7b97\u7ed3\u679c\u7684 [10,32) \u662f\u201c\u6709\u6548\u201d\u7684\uff0c\u4f1a\u5f71\u54cd\u4e0b\u4e00\u4e2a\u8fed\u4ee3\u7684 Key2<\/li>\n
  2. \\(crcinvtab[MSB(Key2_{i+1})]\\) \u7684\u503c\u5bf9\u6bcf\u4e2a\u53ef\u80fd\u7684 Key2 \u90fd\u662f\u786e\u5b9a\u7684\uff0c\u5e76\u4e14 [0,32) \u4f4d\u90fd\u6709\u6548<\/li>\n
  3. \\(MSB(Key1_{i+1})\\) \u5b83\u7684\u7ed3\u679c\u662f\u4e00\u4e2a\u5b57\u8282\uff0c\u90a3\u4e48 [8,32) \u90fd\u662f 0\uff0c\u53ea\u6709 [0,8) \u4f1a\u5f71\u54cd Key2<\/li>\n<\/ol>\n
    \u8fd9\u6837\u7b49\u5f0f\u4e24\u4fa7\u7684\u6bd4\u7279\u4f4d\u53d6\u4e2a\u4ea4\u96c6\u53ef\u4ee5\u770b\u5230 Key2[10,16) \u7684\u6bd4\u7279\u4f4d\u662f\u4e24\u8fb9\u90fd\u77e5\u9053\u7684\uff0c\u800c\u6211\u4eec\u4e5f\u77e5\u9053\u6bcf\u4e2a \\(Key2_i\\) \u5728 [2,16) \u8303\u56f4\u91cc\u90fd\u6709 64 \u4e2a\u53ef\u80fd\u7684\u503c\uff0c\u90a3\u4e48\u901a\u8fc7\u5bf9\u6bd4\u76f8\u90bb Key2 \u7684 [10,16) \u90e8\u5206\uff0c\u627e\u4e0d\u5230\u76f8\u7b49\u503c\u7684 Key2 \u5c31\u53ef\u4ee5\u6392\u9664\u6389\uff0c\u4ece\u800c\u51cf\u5c11\u6211\u4eec\u7684\u641c\u7d22\u7a7a\u95f4\u3002\u6bd4\u5982\u4ece 64 \u4e2a\u7ed3\u679c\u4e2d\u53d6\u51fa\u4e00\u4e2a\u53ef\u80fd\u7684 \\(Key2_i\\)\uff0c\u904d\u5386 64 \u4e2a \\(Key2_{i-1}\\)\uff0c\u5982\u679c\u6240\u6709 \\(Key2_{i-1}\\) \u7684 [10,16) \u90e8\u5206\u548c\u5f53\u524d\u7684 \\(Key2_i\\) \u90fd\u4e0d\u76f8\u7b49\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u6392\u9664\u6389\u8fd9\u4e2a \\(Key2_i\\)\u3002\u663e\u7136 Key2 \u7684\u5e8f\u5217\u8d8a\u591a\uff0c\u80fd\u6392\u9664\u7684\u503c\u4e5f\u8d8a\u591a\uff0c\u5b9e\u9645\u64cd\u4f5c\u4e2d\u53ea\u8981\u4f7f\u7528\u4e8c\u5341\u591a\u4e2a\u5b57\u8282\u5c31\u80fd\u5927\u5e45\u7f29\u5c0f\u53ef\u80fd\u7684\u503c\u3002<\/p>\n
    Key1<\/h2>\n
    \u7f29\u5c0f Key2 \u7684\u6570\u91cf\u540e\u5c31\u8981\u5f00\u59cb\u4e00\u4e2a\u4e2a\u679a\u4e3e\u4e86\uff0c\u4e2d\u95f4\u8ba1\u7b97\u51fa\u7684\u6240\u6709\u53ef\u80fd\u503c\u6700\u7ec8\u90fd\u8981\u4e00\u4e2a\u4e2a\u9a8c\u8bc1\u5e76\u6392\u9664\u3002\u7ee7\u7eed\u6839\u636e\u516c\u5f0f\u5012\u63a8\u3002\u8fed\u4ee3 Key2 \u65f6\u6709\u4e2a \\(MSB(Key1_{i+1}])\\) \u5728\u91cc\u9762\uff0c\u73b0\u5728\u6211\u4eec\u5728\u9010\u4e2a\u679a\u4e3e Key2\uff0c\u90a3\u4e48\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u6211\u4eec\u4e5f\u53ef\u4ee5\u5f97\u5230\u6240\u6709 Key1 \u7684\u6700\u9ad8\u5b57\u8282\uff08\u51c6\u786e\u8bf4\u662f\u4ece\u7b2c\u4e09\u4e2a Key1 \u5f00\u59cb\uff0c\u56e0\u4e3a\u5012\u63a8 Key2 \u65f6\u6211\u4eec\u53ea\u80fd\u5012\u63a8\u5230\u7b2c\u4e8c\u4e2a\u4e3a\u6b62\uff0c\u6839\u636e\u516c\u5f0f\u7b2c\u4e00\u4e2a Key2 \u9700\u8981\u7b2c\u96f6\u4e2a Key2\uff0c\u7b97\u4e0d\u4e86\uff09\u3002
    \n\u518d\u770b Key1 \u7684\u3002$$Key1_{n-1} + LSB(Key0_n) = (Key1_n – 1) * 134775813^{-1}$$ \\(134775813^{-1}\\) \u662f 134775813 \u7684\u4e58\u6cd5\u9006\u5143<\/a>\uff0c\u53ef\u4ee5\u8ba1\u7b97\u51fa\u5b83\u7684\u771f\u5b9e\u503c\u662f 0xd94fa8cd\uff0c\u5e76\u4e0d\u662f\u5b83\u7684\u5012\u6570\u3002
    \n\u56e0\u4e3a\u6211\u4eec\u73b0\u5728\u5df2\u7ecf\u786e\u5b9a Key1 \u7684\u6700\u9ad8\u5b57\u8282\uff0c\u90a3\u4e48\u5728\u516c\u5f0f\u4e24\u8fb9\u540c\u65f6\u53d6 MSB \u5c31\u53ef\u4ee5\u5efa\u7acb \\(Key1_n\\) \u548c \\(Key1_{n-1}\\) \u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u56e0\u4e3a \\(LSB(Key0_n)\\) \u53ea\u662f\u4e00\u4e2a\u5b57\u8282\uff0c\u5728\u5de6\u8fb9\u6574\u4f53\u53d6\u5b8c MSB \u540e\u5b83\u6700\u591a\u53ea\u4f1a\u4f7f\u6700\u7ec8\u7ed3\u679c\u52a0\u4e00\u6216\u51cf\u4e00\uff0c\u5728\u5b9e\u9645\u6bd4\u8f83\u4e2d\u53ea\u8981\u52a0\u4e0a\u8fd9\u4e2a\u5904\u7406\u5c31\u884c\u3002\u7136\u540e\u5982\u6cd5\u70ae\u5236\uff0c\u904d\u5386 Key1 \u7684 [0,24)\uff0c\u627e\u5230\u53ef\u80fd\u7684 Key1 \u503c\uff0c\u7136\u540e\u7ee7\u7eed\u641c\u7d22\u4e0b\u4e00\u4e2a\u53ef\u80fd\u503c\u5373\u53ef\uff08\u8fd9\u90e8\u5206\u53ef\u4ee5\u6253\u8868\u5927\u5e45\u4f18\u5316\u901f\u5ea6\uff09\u3002<\/p>\n
    Key0<\/h2>\n
    \u540c\u6837\u4e0a\u9762\u904d\u5386 Key1 \u65f6\u6211\u4eec\u4e5f\u5f97\u5230\u4e86\u76f8\u5339\u914d\u7684 Key0 \uff08\u53ef\u80fd\u7684\uff09\u6700\u4f4e\u5b57\u8282\u5e8f\u5217\u3002\u7136\u540e\u8ba1\u7b97 \\(Key0_{n+1}\\) \u5219\u76f4\u63a5\u6839\u636e UpdateKeys \u51fd\u6570\u8ba1\u7b97 crc \u5373\u53ef\u3002
    \n\u8bba\u6587\u91cc\u63d0\u5230\u8bf4 crc32 \u662f\u7ebf\u6027\u51fd\u6570\uff0c\u53ea\u8981\u6709\u56db\u4e2a\u8fde\u7eed\u7684 LSB(Key0) \u548c\u4e0e\u5b83\u914d\u5bf9\u7684\u660e\u6587\u5c31\u53ef\u4ee5\u5b8c\u6574\u8fd8\u539f\u51fa\u56db\u4e2a Key0 \u7684\u503c\u3002\u7136\u540e\u53ea\u8981\u6709\u4e86\u4e00\u4e2a\u5b8c\u6574\u7684 Key0\uff0c\u6240\u6709 \\(Key0_{1 \\ldots n}\\) \u7684\u503c\u4e5f\u90fd\u80fd\u63a8\u51fa\u6765\u3002
    \n\u56e0\u4e3a UpdateKeys \u91cc\u90a3\u4e2a crc32 \u5c55\u5f00\u540e\u662f $$Key0_{n+1} = (Key0_n >> 8) \\bigoplus crctab[LSB(Key0_n \\bigoplus P_n)]$$\uff08\u5176\u4e2d P \u4ee3\u8868\u660e\u6587\uff09\u3002\\(LSB(Key0_n)\\) \u548c \\(P_n\\) \u5df2\u77e5\uff0c\u90a3\u4e48\u53ef\u4ee5\u5f97\u5230\u552f\u4e00\u7684 \\(MSB(Key0_{n+1})\\)\u3002\u7136\u540e\u5df2\u77e5 \\(Key0_{n+1}\\) \u7684 [0,8) \u548c [24,32)\uff0c\u518d\u8ba1\u7b97\uff0c\u53ef\u4ee5\u5f97\u5230 \\(Key0_{n+2}\\) \u7684 [0,8) \u548c [16,32)\u3002\u518d\u4e0b\u4e00\u4e2a\u5c31\u662f\u5b8c\u6574\u7684 [0,32) \u4e86\uff0c\u6240\u4ee5\u80fd\u5168\u90e8\u8fd8\u539f\u51fa\u6765\u3002    bkcrack<\/a> \u7684\u4ee3\u7801\u4e2d\u662f<\/p>\n
      \n
    1. \u76f4\u63a5\u4ece \\(Key0_5\\) \u7b97\u5230 \\(Key0_8\\)\uff08\u7b97\u51fa\u4e86\u5b8c\u6574\u7684 \\(Key0_8\\)\uff09<\/li>\n
    2. \u7136\u540e\u7528\u5df2\u77e5\u7684 \\(Key0_8\\) \u5230 \\(Key0_{11}\\) \u7684 LSB \u9a8c\u8bc1\u4e0a\u4e00\u6b65\u7684\u7ed3\u679c<\/li>\n
    3. \u518d\u4ece \\(Key0_8\\) \u5012\u63a8\u81f3 \\(Key0_4\\)<\/li>\n
    4. \u5229\u7528 Key2 \u7684\u8fed\u4ee3\u516c\u5f0f\uff0c\u4ee3\u5165 \\(Key2_2\\) \u5012\u63a8\u51fa \\(Key1_2\\) \u7684 [26,32) \u4f4d\uff08\u56e0\u4e3a\u63a8\u5bfc Key2 \u65f6\u4f4e\u4e24\u4f4d\u6ca1\u53c2\u4e0e\uff0c\u6240\u4ee5\u8fd9\u91cc\u5f97\u5230\u7684 Key1 \u4e5f\u62a0\u6389\u4e86\u4e24\u4f4d\uff09<\/li>\n
    5. \u5229\u7528 Key1 \u7684\u8fed\u4ee3\u516c\u5f0f\u914d\u5408\u5f97\u5230\u7684 Key0\uff0c\u5c06 \\(Key1_4\\) \u548c \\(Key0_4\\) \u4ee3\u5165\u5e76\u5012\u63a8\u4e24\u6b21\u5f97\u5230 \\(Key1_2\\)<\/li>\n
    6. \u6bd4\u8f83\u4e0a\u9762\u4e24\u6b65\u5404\u81ea\u5f97\u5230\u7684 \\(Key1_2\\) \u7684\u5dee\uff0c\u5982\u679c\u5c0f\u4e8e \\(2^{27}-1+256\\) \u5219\u901a\u8fc7\u9a8c\u8bc1\uff08\u56e0\u4e3a\u516c\u5f0f\u91cc\u8fd8\u6709\u4e2a LSB(Key0)\uff0c\u6240\u4ee5\u518d\u52a0\u4e0a 256\uff09<\/li>\n<\/ol>\n
      \u539f\u59cb Key<\/h2>\n
      \u5168\u90e8\u7b97\u5b8c\u540e\u5c31\u53ef\u4ee5\u5f00\u59cb\u7b97\u6700\u521d\u7684\u4e09\u4e2a key \u4e86\u3002\u5c06 3 \u4e2a key \u7684\u7b2c\u516b\u6b21\u8fed\u4ee3\u503c\u4f5c\u4e3a\u521d\u59cb\u503c\uff0c\u914d\u5408\u660e\u6587\u8fdb\u884c UpdateKeys \u7684\u9006\u8fd0\u7b97\u3002\u8fd9\u91cc\u5012\u63a8\u65f6\u9664\u4e86\u660e\u6587\u7684\u90e8\u5206\uff08\u6bd4\u5982\u8fd9\u91cc\u4ece\u7b2c\u516b\u4e2a\u5b57\u8282\u7684\u660e\u6587\u5f00\u59cb\uff09\u904d\u5386\u5b8c\u4e4b\u5916\uff0c\u8fd8\u6709 12 \u4e2a\u5b57\u8282\u7684 ZIP \u5934\u90e8\u4e5f\u8981\u63a5\u7740\u904d\u5386\uff0c\u8fd9\u624d\u628a\u539f\u59cb key \u90fd\u62ff\u5230\u624b\u3002
      \n<\/br><\/br>
      \n\u6211\u5199\u7684      \u6837\u4f8b\u4ee3\u7801<\/a>\u4e5f\u662f\u53c2\u8003 bkcrack<\/a>\uff0c\u867d\u7136\u80fd\u4e5f\u80fd\u8dd1\u51fa\u7ed3\u679c\u4f46\u662f\u56e0\u4e3a\u6ca1\u505a\u4f18\u5316\u6240\u4ee5\u6162\u5f97\u4e00\u6279\uff0c\u59d1\u4e14\u7559\u4e86\u4e00\u4efd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u5728\u770b CTF \u65f6\u53d1\u73b0\u4e86 zip \u660e\u6587\u653b\u51fb\u7684\u653b\u51fb\u65b9\u5f0f\uff0c\u7136\u800c\u4e3e\u7684\u4f8b\u5b50\u91cc\u57fa\u672c\u90fd\u662f\u4f7f\u7528\u5de5\u5177\u2014\u2014\u4e5f\u5c31\u662f ARCHPR \u7b80… <\/p>\n
      \u9605\u8bfb\u66f4\u591a<\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[85],"tags":[195,193,194,196],"class_list":["post-1685","post","type-post","status-publish","format-standard","hentry","category-programs","tag-ctf","tag-zip","tag-zipcrypto","tag-196"],"_links":{"self":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/1685","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/comments?post=1685"}],"version-history":[{"count":69,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/1685\/revisions"}],"predecessor-version":[{"id":1758,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/1685\/revisions\/1758"}],"wp:attachment":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/media?parent=1685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/categories?post=1685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/tags?post=1685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}