{"id":247,"date":"2022-12-06T12:38:06","date_gmt":"2022-12-06T04:38:06","guid":{"rendered":"https:\/\/shangwendada.co\/?p=247"},"modified":"2022-12-06T12:38:21","modified_gmt":"2022-12-06T04:38:21","slug":"reversenisactf-2022-string","status":"publish","type":"post","link":"https:\/\/blog.shangwendada.top\/index.php\/2022\/12\/06\/reversenisactf-2022-string\/","title":{"rendered":"[Reverse]NISACTF 2022 string"},"content":{"rendered":"<h1>\u9898\u76ee\u4e0b\u8f7d:<a href=\"file:\/\/\/E:\/%E4%B8%8B%E8%BD%BD\/string\" title=\"NISACTF 2022 string\">NISACTF 2022 string<\/a><\/h1>\n<h1>\u9898\u89e3<\/h1>\n<h2>srand\u4e8erand\u51fd\u6570\u4ea7\u751f\u968f\u673a\u6570<\/h2>\n<h3>\u63cf\u8ff0<\/h3>\n<p>C \u5e93\u51fd\u6570 void srand(unsigned int seed) \u64ad\u79cd\u7531\u51fd\u6570 rand \u4f7f\u7528\u7684\u968f\u673a\u6570\u53d1\u751f\u5668\u3002<\/p>\n<h3>\u53c2\u6570<\/h3>\n<p>seed &#8212; \u8fd9\u662f\u4e00\u4e2a\u6574\u578b\u503c\uff0c\u7528\u4e8e\u4f2a\u968f\u673a\u6570\u751f\u6210\u7b97\u6cd5\u64ad\u79cd\u3002<\/p>\n<h3>\u8fd4\u56de\u503c<\/h3>\n<p>\u8be5\u51fd\u6570\u6ca1\u6709\u4efb\u4f55\u8fd4\u56de\u503c<\/p>\n<h2>ida\u5206\u6790<\/h2>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/shangwendada.co\/wp-content\/uploads\/2022\/12\/image-1670301380283.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/shangwendada.co\/wp-content\/uploads\/2022\/12\/image-1670301380283.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"file\" \/><\/div><br \/>\n\u8fd9\u6bb5\u51fd\u6570\u5c31\u662f\u7528\u6765\u4ea7\u751fflag\u7684<br \/>\n<strong>\u6ce8\u610f\uff1a<\/strong>\u672c\u9898\u73af\u5883\u9700\u8981\u4f7f\u7528Linux\u7684\u968f\u673a\u6570\u8868\uff0c\u4f7f\u7528Windows\u5199\u7684\u811a\u672c\u7b54\u6848\u4f1a\u4e0d\u4e00\u81f4!!<br \/>\n<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/shangwendada.co\/wp-content\/uploads\/2022\/12\/image-1670301481230.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/shangwendada.co\/wp-content\/uploads\/2022\/12\/image-1670301481230.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"file\" \/><\/div><\/p>\n<h2>exp<\/h2>\n<pre><code class=\"language-cpp\">#include&lt;iostream&gt;\nusing namespace std;\nint main()\n{\n  srand(0x2766);\n  cout&lt;&lt;&quot;NSSCTF{&quot;;\n  for(int m = 0 ; m &lt; 13 ; m++)\n  {\n    int v = rand();\n    cout&lt;&lt;v%8+1;\n  }\n  cout&lt;&lt;&quot;}&quot;;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u76ee\u4e0b\u8f7d:NISACTF 2022 string \u9898\u89e3 srand\u4e8erand\u51fd\u6570\u4ea7\u751f\u968f\u673a\u6570 \u63cf\u8ff0 C \u5e93\u51fd\u6570  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":157,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-247","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/comments?post=247"}],"version-history":[{"count":1,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/247\/revisions"}],"predecessor-version":[{"id":250,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/247\/revisions\/250"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/media\/157"}],"wp:attachment":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/media?parent=247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/categories?post=247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/tags?post=247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}