{"id":3596,"date":"2022-08-16T18:08:45","date_gmt":"2022-08-16T09:08:45","guid":{"rendered":"https:\/\/taitan916.info\/blog\/?p=3596"},"modified":"2022-08-16T18:08:45","modified_gmt":"2022-08-16T09:08:45","slug":"post-3596","status":"publish","type":"post","link":"https:\/\/taitan916.info\/blog\/archives\/3596","title":{"rendered":"PHP\u3067\u304a\u554f\u3044\u5408\u308f\u305b\u7b49\u306eform\u69cb\u7bc9\u6642\u306bCSRF\u5bfe\u7b56\u3092\u884c\u3046\u65b9\u6cd5"},"content":{"rendered":"<p>\u4ed6\u793e\u304c\u5236\u4f5c\u3055\u308c\u305f\u304a\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\u3092\u6539\u4fee\u3059\u308b\u6848\u4ef6\u304c\u3042\u3063\u305f\u3002\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u62dd\u898b\u3057\u3066\u3044\u308b\u3068\u30c8\u30fc\u30af\u30f3\u3092\u9001\u4fe1\u3057\u3066\u304a\u308a\u3001\u306a\u3093\u3060\u3053\u308c\uff1f \u3068\u306a\u3063\u305f\u306e\u3067\u8abf\u3079\u3066\u307f\u308b\u3068\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30ea\u30af\u30a8\u30b9\u30c8\u30d5\u30a9\u30fc\u30b8\u30a7\u30ea(CSRF)\u3068\u547c\u3070\u308c\u308b\u653b\u6483\u306e\u5bfe\u7b56\u3089\u3057\u3044\u3002\u4ee5\u4e0b\u306b\u5b9f\u88c5\u65b9\u6cd5\u7b49\u3092\u30e1\u30e2\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n<p>\u30d5\u30a9\u30fc\u30e0\u306e\u5165\u529b\u30da\u30fc\u30b8\u306b\u4ee5\u4e0b\u3092\u8ffd\u8a18\u3059\u308b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">session_start();\r\n\r\n\/\/\u30c8\u30fc\u30af\u30f3\u3092\u751f\u6210\r\n$token = bin2hex(random_bytes(32));\r\n\r\n\/\/\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u30c8\u30fc\u30af\u30f3\u3092\u4fdd\u5b58\r\n$_SESSION['token'] = $token;<\/pre>\n<p>&nbsp;<\/p>\n<p>\u6b21\u306b\u30d5\u30a9\u30fc\u30e0\u5185\u5bb9\u3092\u53d7\u3051\u53d6\u308b\u30da\u30fc\u30b8\u306b\u3066\u4ee5\u4e0b\u3067\u30c8\u30fc\u30af\u30f3\u304c\u6b63\u3057\u3044\u304b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">session_start();\r\n\r\nif( $_SESSION['token'] == $_POST['token'] ){\r\n    \/\/\u30c8\u30fc\u30af\u30f3\u304c\u6b63\u3057\u3044\u5834\u5408\u306e\u51e6\u7406\r\n}else{\r\n    \/\/NG\u6642\u306e\u51e6\u7406\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30ea\u30af\u30a8\u30b9\u30c8\u30d5\u30a9\u30fc\u30b8\u30a7\u30ea(CSRF)\u3068\u306f<\/h2>\n<p>\u7b2c\u4e09\u8005\u306e\u30b5\u30fc\u30d0\u306b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u7528\u306eWeb\u30da\u30fc\u30b8\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u30da\u30fc\u30b8\u306e\u9001\u4fe1\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3053\u3068\u3067\u672c\u6765\u306e\u304a\u554f\u3044\u5408\u308f\u305b\u5b8c\u4e86\u30da\u30fc\u30b8\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3088\u3046\u306a\u653b\u6483\u3068\u306e\u3053\u3068\u3002\u305d\u306e\u305f\u3081\u9001\u4fe1\u524d\u3068\u9001\u4fe1\u5f8c\u306b\u30c8\u30fc\u30af\u30f3\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u3067\u5bfe\u7b56\u306b\u306a\u308b\u3068\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>CORS\u306f\u3069\u3046\u306a\u308b\uff1f<\/h2>\n<p>CSRF\u306e\u653b\u6483\u5185\u5bb9\u3092\u898b\u305f\u969b\u306bCORS\u304c\u3042\u308b\u304b\u3089\u554f\u984c\u306a\u3044\u306e\u3067\u306f\uff1f \u3068\u601d\u3063\u305f\u304c\u305d\u3046\u3058\u3083\u306a\u3044\u3089\u3057\u3044\u3002<a href=\"https:\/\/qiita.com\/netebakari\/items\/41baa7e1d0b8d89f9d12\" target=\"_blank\" rel=\"noopener\">\u3053\u3061\u3089\u306e\u30b5\u30a4\u30c8<\/a>\u306b\u3088\u308b\u3068CORS\u306fJavaScript\u3067POST\u7b49\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u3057\u305f\u969b\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u901a\u308b\u304c\u30ec\u30b9\u30dd\u30f3\u30b9\u306f\u5f97\u3089\u308c\u306a\u3044\u3063\u307d\u3044\u3002\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u901a\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u30c7\u30fc\u30bf\u306f\u9001\u4fe1\u3055\u308c\u3061\u3083\u3046\u306e\u3067CSRF\u306f\u6210\u7acb\u3059\u308b\u3068\u3002\u3084\u3084\u3053\u3057\u3044\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u6240\u611f<\/h2>\n<p>CSRF\u5bfe\u7b56\u306e\u5b9f\u88c5\u81ea\u4f53\u306f\u305d\u3053\u307e\u3067\u624b\u9593\u3058\u3083\u306a\u3044\u306e\u3067\u3001\u4eca\u5f8c\u30d5\u30a9\u30fc\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306f\u5fc5\u305a\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ed6\u793e\u304c\u5236\u4f5c\u3055\u308c\u305f\u304a\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\u3092\u6539\u4fee\u3059\u308b\u6848\u4ef6\u304c\u3042\u3063\u305f\u3002\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u62dd\u898b\u3057 ... <\/p>\n","protected":false},"author":1,"featured_media":1085,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-3596","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/3596","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/comments?post=3596"}],"version-history":[{"count":0,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/3596\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media\/1085"}],"wp:attachment":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media?parent=3596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/categories?post=3596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/tags?post=3596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}