ctf第二周200分杯2016-everything題目出處年杯misc類try

1、題目出處:2016年華山杯misc類tryeverything分值: 200KEYflag_Xdhsh_ctf:4Ea9F16bA8bc包含知識(shí)點(diǎn): misc解題步驟1.打開(kāi)該題網(wǎng)頁(yè)，可以看到該題文件下來(lái)分析。在 linux當(dāng)中通過(guò) file 命令檢查文件信息2.3.可以發(fā)現(xiàn)是 gzip壓縮的文件，嘗試解壓它，但是不成功。再次用 binwalk 檢查文件信息。4.可以看到 filename 都是數(shù)字，并且時(shí)大量的 gzip壓縮的文件。所以的想法是將文件分開(kāi)來(lái)，然后根據(jù)文件名大小按自然數(shù)排序，然后解壓輸出信息。5.編寫對(duì)應(yīng)的程序。import gzipdef foo():f_all=open(f

2、ile,rb).read() #prlen(f_all)l1=0, 24, 48, 73, 98, 122 , 146 , 170 , 195 , 220 , 245 , 270 , 295 , 319 ,344 , 368 , 393 , 418 , 443 , 467 , 491 , 515 , 539 , 562 , 586 , 611 , 635 , 659 , 683 , 708 , 732 ,756 , 781 , 806 , 829 , 853 , 877 , 901 , 925 , 950 , 975 , 999 , 1024, 1048, 1071, 1095, 1120,1

3、144, 1168, 1192, 1216, 1241, 1265, 1290, 1315, 1340, 1364, 1389, 1412, 1436, 1460, 1484,1508, 1533, 1557, 1582, 1607, 1631, 1656, 1681, 1705, 1729, 1753, 1777, 1802, 1825, 1849,1873, 1898, 1923, 1947, 1971, 1995, 2020, 2044, 2069, 2094, 2118, 2143, 2167, 2191, 2215,2239, 2264, 2288, 2313, 2338, 2363

4、, 2387, 2412, 2437, 2462, 2486, 2511, 2536, 2560, 2584,2609, 2634, 2658, 2682, 2707, 2731, 2755, 2780, 2805, 2829, 2854, 2878, 2902, 2926, 2950,2974, 2998, 3022, 3046, 3071, 3096, 3120, 3145, 3170, 3195, 3220, 3245, 3269, 3293, 3316,3340, 3364, 3389, 3413, 3437, 3462, 3486, 3511, 3534, 3559, 3583, 3

5、607, 3631, 3655, 3679,3704, 3727, 3751, 3774, 3798, 3822, 3847, 3870, 3894, 3918, 3942, 3966, 3990l2=24,72,108,129,18,92,63,162,110,156,132,101,34,143,28,136,115,114,17,14,69,10,7,11,127,55,58,86,149,21,41,120,142,6,22,36,37,88,133,161,35,137,31,3,20,113,46,42,91,78,102,19,135,153,105,48,107,9,68,64

6、,81,93,147,67,138,160,85,106,154,75,89,66,26,141,2,98,96,124,145,84,71,15,140,90,144,100,61,131,27,23,53,40,130,47,117,148,150,50,111,122,146,57,121,123,82,45,152,109,62,70,116,77,12,139,155,80,103,13,74,16,51,94,87,97,25,151,128,54,125,112,119,118,158,99,95,4,38,79,157,29,33,134,30,126,1,104,52,65,44,83,73,163,0,76,5,60,59,159,8,49,32,43,56,39fname_list =for i in xrange(len(l2):s = f_alll1i:l1i+1 fname=l2i# gz filewith open(rout%d.gz %fname,wb) as f: f.write(s)fname_list.append(fname)fname_list.sort()flag = for fname