{"id":931,"date":"2019-09-21T19:33:40","date_gmt":"2019-09-21T11:33:40","guid":{"rendered":"https:\/\/flandre-scarlet.moe\/blog\/?p=931"},"modified":"2019-09-21T21:18:19","modified_gmt":"2019-09-21T13:18:19","slug":"crackme-%e5%8f%8d%e6%b1%87%e7%bc%96%e7%bb%83%e4%b9%a0%e4%b9%8b-081","status":"publish","type":"post","link":"https:\/\/flandre-scarlet.moe\/blog\/931\/","title":{"rendered":"CrackMe \u53cd\u6c47\u7f16\u7ec3\u4e60\u4e4b 081"},"content":{"rendered":"

\u4f5c\u4e3a\u7ec3\u624b\u7684 160 \u4e2a CrackMe \u7cfb\u5217\u6574\u7406\u5206\u6790<\/br>
\nCrackMe \u6765\u6e90\uff1a\u3010\u53cd\u6c47\u7f16\u7ec3\u4e60\u3011160\u4e2aCrackME\u7d22\u5f15\u76ee\u5f551~160\u5efa\u8bae\u6536\u85cf\u5907\u7528<\/a><\/p>\n

\u8fd9\u4e2a CrackMe \u4f7f\u7528\u4e86 RSA \u7b97\u6cd5\uff0c\u56e0\u4e3a\u7a0b\u5e8f\u4e2d\u4e5f\u7ed9\u4e86\u76f8\u5e94\u7684\u63d0\u793a\uff0c\u5728\u9006\u7684\u8fc7\u7a0b\u4e2d\u5c31\u4f1a\u6709\u610f\u8bc6\u7684\u53bb\u627e\u8fd9\u65b9\u9762\u7684\u7279\u5f81\uff0c\u5f53\u7136 RSA \u7b97\u6cd5\u8fd8\u662f\u9700\u8981\u4e8b\u5148\u4e86\u89e3\u4e0b\u3002<\/br>
\n\u7b97\u6cd5\u53c2\u8003\u53ef\u89c1\uff1aRSA\u52a0\u5bc6\u7b97\u6cd5<\/a> OR RSA \u7b97\u6cd5\u7684\u52a0\u5bc6\u539f\u7406\u662f\u4ec0\u4e48<\/a><\/p>\n

<\/p>\n

\u901a\u8fc7\u63d0\u793a\u5b57\u7b26\u4e32\u53ef\u76f4\u63a5\u5b9a\u4f4d\u5230\u6309\u94ae\u7684\u5904\u7406\u51fd\u6570 004029B0\uff0c\u4e00\u5f00\u59cb\u901a\u8fc7\u5b57\u7b26\u4e32\u590d\u5236\u8bbe\u7f6e\u4e00\u4e9b\u521d\u59cb\u53d8\u91cf\u3002\u63a5\u7740\u4f1a\u68c0\u67e5\u8f93\u5165\u7684\u6ce8\u518c\u7801\u662f\u5426\u4e3a 14 \u4e2a\u7eaf\u6570\u5b57\uff0c\u6ee1\u8db3\u6761\u4ef6\u540e\u7ee7\u7eed\u3002<\/p>\n

\u8d77\u521d\u8fd8\u4ee5\u4e3a\u662f\u4e2a\u5927\u6570\u7ec4\uff0c\u540e\u6765\u60f3\u60f3\u53ef\u80fd\u662f\u4e00\u4e9b\u5927\u6574\u6570\u7684\u7ed3\u6784\u3002<\/p>\n

\u53d8\u91cf\u521d\u59cb\u5316\u5b8c\u6bd5\u540e\u4f1a\u5c06\u6ce8\u518c\u7801\u7684 14 \u4e2a\u6570\u5b57\u7b80\u5355\u62c6\u5206\u6210 7 + 7 \u4e24\u90e8\u5206\u8fdb\u884c\u5904\u7406\uff0c\u63a5\u7740\u5c31\u5230\u5173\u952e\u51fd\u6570 00402B1D \u8fd9\u91cc\u4e86\u3002<\/p>\n

<\u524d\u7565>\r\n00402A6A  |.  8BC2          mov eax,edx\r\n00402A6C  |.  C64424 17 00  mov byte ptr ss:[esp+0x17],0x0                     ;  "12790891"\r\n00402A71  |.  C64424 0F 00  mov byte ptr ss:[esp+0xF],0x0\r\n00402A76  |.  8B08          mov ecx,dword ptr ds:[eax]\r\n00402A78  |.  894C24 10     mov dword ptr ss:[esp+0x10],ecx\r\n00402A7C  |.  66:8B48 04    mov cx,word ptr ds:[eax+0x4]\r\n00402A80  |.  66:894C24 14  mov word ptr ss:[esp+0x14],cx\r\n00402A85  |.  8B4A 07       mov ecx,dword ptr ds:[edx+0x7]\r\n00402A88  |.  8A40 06       mov al,byte ptr ds:[eax+0x6]\r\n00402A8B  |.  894C24 08     mov dword ptr ss:[esp+0x8],ecx\r\n00402A8F  |.  884424 16     mov byte ptr ss:[esp+0x16],al\r\n00402A93  |.  8D42 07       lea eax,dword ptr ds:[edx+0x7]\r\n00402A96  |.  8D4C24 10     lea ecx,dword ptr ss:[esp+0x10]\r\n00402A9A  |.  66:8B50 04    mov dx,word ptr ds:[eax+0x4]\r\n00402A9E  |.  8A40 06       mov al,byte ptr ds:[eax+0x6]                       ;  \u6ce8\u518c\u7801\u4ece\u4e2d\u95f4\u62c6\u6210\u4e24\u4e2a\u5b57\u7b26\u4e32\r\n00402AA1  |.  51            push ecx\r\n00402AA2  |.  8D8C24 940500>lea ecx,dword ptr ss:[esp+0x594]\r\n00402AA9  |.  66:895424 10  mov word ptr ss:[esp+0x10],dx\r\n00402AAE  |.  884424 12     mov byte ptr ss:[esp+0x12],al\r\n00402AB2  |.  E8 79E6FFFF   call <tsc.strcpy1>\r\n00402AB7  |.  8D5424 18     lea edx,dword ptr ss:[esp+0x18]                    ;  "12890891"\r\n00402ABB  |.  8D8424 E00000>lea eax,dword ptr ss:[esp+0xE0]                    ;  "9901"\r\n00402AC2  |.  52            push edx                                           ; \/Arg3 = 0013F254 ASCII "12790891"\r\n00402AC3  |.  8D8C24 040400>lea ecx,dword ptr ss:[esp+0x404]                   ; |\r\n00402ACA  |.  50            push eax                                           ; |Arg2 = 0013F31C ASCII "9901"\r\n00402ACB  |.  51            push ecx                                           ; |Arg1 = 0013F7CC ASCII "1111111"\r\n00402ACC  |.  8D8C24 9C0500>lea ecx,dword ptr ss:[esp+0x59C]                   ; |\r\n00402AD3  |.  C68424 6C0600>mov byte ptr ss:[esp+0x66C],0x4                    ; |\r\n00402ADB  |.  E8 30F8FFFF   call tsc.00402310                                  ; \\tsc.00402310\r\n00402AE0  |.  8D5424 08     lea edx,dword ptr ss:[esp+0x8]\r\n00402AE4  |.  8D8C24 380300>lea ecx,dword ptr ss:[esp+0x338]\r\n00402AEB  |.  52            push edx\r\n00402AEC  |.  C68424 640600>mov byte ptr ss:[esp+0x664],0x5\r\n00402AF4  |.  E8 37E6FFFF   call <tsc.strcpy1>\r\n00402AF9  |.  8D4424 18     lea eax,dword ptr ss:[esp+0x18]\r\n00402AFD  |.  8D8C24 E00000>lea ecx,dword ptr ss:[esp+0xE0]\r\n00402B04  |.  50            push eax                                           ; \/Arg3 = 0013F31C ASCII "9901"\r\n00402B05  |.  8D9424 CC0400>lea edx,dword ptr ss:[esp+0x4CC]                   ; |\r\n00402B0C  |.  51            push ecx                                           ; |Arg2 = 0013F7CC ASCII "1111111"\r\n00402B0D  |.  52            push edx                                           ; |Arg1 = 0013F254 ASCII "12790891"\r\n00402B0E  |.  8D8C24 440300>lea ecx,dword ptr ss:[esp+0x344]                   ; |\r\n00402B15  |.  C68424 6C0600>mov byte ptr ss:[esp+0x66C],0x6                    ; |\r\n00402B1D  |.  E8 EEF7FFFF   call tsc.00402310                                  ; \\tsc.00402310\r\n00402B22  |.  8D8424 700200>lea eax,dword ptr ss:[esp+0x270]\r\n00402B29  |.  8D8C24 000400>lea ecx,dword ptr ss:[esp+0x400]\r\n00402B30  |.  50            push eax\r\n00402B31  |.  C68424 640600>mov byte ptr ss:[esp+0x664],0x7\r\n00402B39  |.  E8 82F2FFFF   call <tsc.strcmp1>\r\n00402B3E  |.  85C0          test eax,eax\r\n00402B40  |.  0F84 BF000000 je tsc.00402C05\r\n00402B46  |.  8D8C24 A80100>lea ecx,dword ptr ss:[esp+0x1A8]\r\n00402B4D  |.  51            push ecx\r\n00402B4E  |.  8D8C24 CC0400>lea ecx,dword ptr ss:[esp+0x4CC]\r\n00402B55  |.  E8 66F2FFFF   call <tsc.strcmp1>\r\n00402B5A  |.  85C0          test eax,eax\r\n00402B5C  |.  0F84 A3000000 je tsc.00402C05                                    ; \u8df3\u8f6c\u5219\u6ce8\u518c\u6210\u529f\r\n<\/pre>\n
\u8fd9\u4e2a\u51fd\u6570\u4f20\u5165\u4e86 4 \u4e2a\u53c2\u6570\uff0c\u5206\u522b\u662f\u62c6\u5206\u51fa\u7684 7 \u6570\u5b57\u6ce8\u518c\u7801\uff0c\u56fa\u5b9a\u503c 9901 \u548c\u56fa\u5b9a\u503c 12890891\uff0c\u8fd8\u6709\u4e2a\u8f93\u51fa\u53d8\u91cf\u300200402310 \u7684\u5185\u90e8\u76f8\u5f53\u590d\u6742\uff0c\u4e00\u770b\u5c31\u4e0d\u662f\u4eba\u5e72\u4e8b\u3002\u8df3\u8fc7\u53bb\u770b\u4e0b\u8fd0\u884c\u7ed3\u679c\uff0c\u7b97\u4e86\u4e2a 898713 \u51fa\u6765\uff08\u6211\u586b\u7684\u662f 7 \u4e2a 2\uff09\u3002\u56e0\u4e3a\u4e8b\u5148\u5df2\u7ecf\u4e86\u89e3\u5230\u662f RSA \u7b97\u6cd5\uff0c\u6240\u4ee5\u63a8\u6d4b\u662f\u4e00\u4e2a\u5feb\u901f\u5e42\u7684\u7b97\u6cd5\uff0c\u5199\u4e2a\u51fd\u6570\u9a8c\u8bc1\u4e0b\uff0c<\/p>\n
def f(a, b, n):    \r\n    t=1;\r\n    y=a;\r\n    while (b != 0):\r\n        if b & 1 == 1:\r\n            t = t * y % n;\r\n        y = y * y % n;\r\n        b = b >> 1;\r\n    return t<\/pre>\n
\u53d1\u73b0\u8ba1\u7b97\u7ed3\u679c\u4e00\u81f4\u3002<\/p>\n
\u7136\u540e\u63a5\u7740\u770b\u4e0b\u9762\uff0c\u5c06\u524d\u540e\u4e24\u4e2a 7 \u4f4d\u6570\u5b57\u8ba1\u7b97\u5b8c\u6bd5\u540e\u4f1a\u5206\u522b\u5c06\u7ed3\u679c\u548c\u56fa\u5b9a\u7684 8483678 \u548c 5666933 \u8fdb\u884c\u6bd4\u8f83\uff0c\u4e24\u8005\u53ea\u8981\u6709\u4e00\u4e2a\u76f8\u7b26\u5373\u53ef\u901a\u8fc7\u9a8c\u8bc1\u3002<\/p>\n
\u6211\u4eec\u586b\u5165\u7684\u6ce8\u518c\u7801\u76f8\u5f53\u4e8e\u5bf9\u5e94 RSA \u7684\u6d88\u606f n\uff0ce = 9901\uff0cN = 12890891\uff0c\u7136\u540e\u6839\u636e\u52a0\u5bc6\u516c\u5f0f\u8ba1\u7b97\u51fa\u7684\u7ed3\u679c\u548c\u7a0b\u5e8f\u5185\u7f6e\u7684 c \u8fdb\u884c\u6bd4\u8f83\uff0c\u4ece\u800c\u5b8c\u6210\u9a8c\u8bc1\u3002<\/br>
\nRSA \u52a0\u5bc6\uff1a\"\"<\/br>
\nRSA \u89e3\u5bc6\uff1a\"\"<\/br>
\n\u800c\u4e0a\u9762\u51fa\u73b0\u7684 8483678 \u548c 5666933 \u5c31\u662f\u9884\u5b9a\u4e49\u7684\u5bc6\u6587 c \u4e86\u3002<\/p>\n
\u56e0\u4e3a\u89e3\u7a7a\u95f4\u4e5f\u4e0d\u5927\uff0c\u6240\u4ee5\u53ef\u4ee5\u76f4\u63a5\u679a\u4e3e\u51fa\u6b63\u786e\u7ed3\u679c\uff0c\u56e0\u4e3a\u7a0b\u5e8f\u4e2d\u4f1a\u5c06\u6ce8\u518c\u7801\u62c6\u5206\uff0c\u6240\u4ee5\u7ed3\u679c\u7684\u4f4d\u6570\u6700\u591a\u53ea\u6709 7 \u4f4d\uff0c\u5199\u4e2a\u5faa\u73af\u5f88\u5feb\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51fa\u6765\uff0c\u800c\u4e14\u6b63\u597d\u5c0f\u4e8e 12890891 \u7684 7 \u4f4d\u6570\u7ed3\u679c\u53ea\u6709 1 \u4e2a\u3002\u5c06\u524d\u540e\u4e24\u90e8\u5206\u7684\u7ed3\u679c\u5206\u522b\u8ba1\u7b97\u51fa\u6765\u5c31\u884c\u4e86\u3002<\/p>\n
def f(a, b, n):    \r\n    t=1;\r\n    y=a;\r\n    while (b != 0):\r\n        if b & 1 == 1:\r\n            t = t * y % n;\r\n        y = y * y % n;\r\n        b = b >> 1;\r\n    return t\r\n\r\nfor i in range(1, 9999999):\r\n    res = f(i, 9901, 12790891)\r\n    if res == 8483678:\r\n        print('first part: ' + str(i))      # first part: 7167622\r\n    elif res == 5666933:\r\n        print('second part: ' + str(i))     # second part: 3196885<\/pre>\n
\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u4f5c\u4e3a\u7ec3\u624b\u7684 160 \u4e2a CrackMe \u7cfb\u5217\u6574\u7406\u5206\u6790 CrackMe \u6765\u6e90\uff1a\u3010\u53cd\u6c47\u7f16\u7ec3\u4e60\u3011160\u4e2aCrackM… <\/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":[31],"tags":[32,33],"class_list":["post-931","post","type-post","status-publish","format-standard","hentry","category-reverse-engineering","tag-crackme","tag-33"],"_links":{"self":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/931","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=931"}],"version-history":[{"count":0,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/931\/revisions"}],"wp:attachment":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/media?parent=931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/categories?post=931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/tags?post=931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}