{"id":30844,"date":"2023-02-02T10:44:02","date_gmt":"2023-09-16T23:14:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91csrf%e6%98%af%e4%bb%80%e4%b9%88-%e5%af%b9%e7%ad%96\/"},"modified":"2025-08-12T21:04:00","modified_gmt":"2025-08-12T13:04:00","slug":"%e3%80%90php%e3%80%91csrf%e6%98%af%e4%bb%80%e4%b9%88-%e5%af%b9%e7%ad%96","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91csrf%e6%98%af%e4%bb%80%e4%b9%88-%e5%af%b9%e7%ad%96\/","title":{"rendered":"\u3010PHP\u3011CSRF\u662f\u4ec0\u4e48—–\u5bf9\u7b56"},"content":{"rendered":"

\u8de8\u7ad9\u8bf7\u6c42\u4f2a\u9020<\/h2>\n

\u8de8\u7ad9\u8bf7\u6c42\u4f2a\u9020\uff08CSRF\uff09\u662f\u4e00\u79cd\u6076\u610f\u653b\u51fb\u65b9\u5f0f\uff0c\u5b83\u5229\u7528\u5df2\u8ba4\u8bc1\u7684\u7528\u6237\u7684\u8eab\u4efd\u6765\u6267\u884c\u975e\u610f\u613f\u7684\u64cd\u4f5c\u3002<\/h4>\n

\u8de8\u7ad9\u8bf7\u6c42\u4f2a\u9020\uff08Cross-Site Request Forgery\uff09\u662f\u4e00\u79cd\u5229\u7528Web\u5e94\u7528\u7a0b\u5e8f\u7684\u6f0f\u6d1e\u6216\u5229\u7528\u8be5\u6f0f\u6d1e\u8fdb\u884c\u653b\u51fb\u7684\u65b9\u5f0f\u3002\u7f29\u5199\u4e3aCSRF\uff08\u4e5f\u53ef\u4ee5\u8bfb\u4f5c\u201csea-surf\u201d\uff09\u6216\u8005XSRF\u3002\u5b83\u4e5f\u88ab\u79f0\u4e3a\u8bf7\u6c42\u5f3a\u5236\uff0c\u4f1a\u8bdd\u52ab\u6301\uff08session riding\uff09\u3002<\/p>\n

CSRF\u8106\u5f31\u6027\u662f\u6307\u4ee5\u4e0b\u653b\u51fb\uff08CSRF\u653b\u51fb\uff09\u4f7f\u5f97\u653b\u51fb\u8005\u80fd\u591f\u5229\u7528\u7684\u6f0f\u6d1e\uff1a
\n– \u653b\u51fb\u8005\u6b3a\u9a97\u6d4f\u89c8\u5668\u6216\u5176\u4ed6\u7528\u6237\u5ba2\u6237\u7aef\uff0c\u53d1\u9001\u672a\u7ecf\u7528\u6237\u610f\u56fe\u7684\u8bf7\u6c42\uff08\u4f8b\u5982HTTP\u8bf7\u6c42\uff09\u7ed9Web\u670d\u52a1\u5668\u3002
\n– \u5982\u679cWeb\u5e94\u7528\u7a0b\u5e8f\u8bbe\u8ba1\u4e0a\u6ca1\u6709\u5145\u5206\u9a8c\u8bc1\u6765\u81ea\u7528\u6237\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff0c\u5219\u4f1a\u5c06\u8fd9\u4e2a\u8bf7\u6c42\u8bef\u4ee5\u4e3a\u662f\u5408\u6cd5\u8bf7\u6c42\uff0c\u4ece\u800c\u9020\u6210\u635f\u5bb3\u3002
\n– CSRF\u653b\u51fb\u53ef\u4ee5\u5229\u7528URL\u3001\u56fe\u7247\u52a0\u8f7d\u3001XMLHttpRequest\u7b49\u65b9\u5f0f\u8fdb\u884c\u6267\u884c\u3002<\/p>\n

\u89e3\u51b3\u529e\u6cd5<\/h4>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u65b9\u6cd5\u4ecb\u7ecd\uff1a\u5c06\u8868\u5355\u7684\u9690\u85cf\u503c\u901a\u8fc7\u5bc6\u7801\u5b66\u51fd\u6570\u8fdb\u884c\u5904\u7406\u3002<\/p>\n

\u5173\u952e\u8bcd<\/h6>\n

\u30fbopenssl_random_pseudo_bytes
\n\u751f\u6210\u4e00\u4e2a\u4f2a\u968f\u673a\u5b57\u8282\u5b57\u7b26\u4e32
\n\u30fbbin2hex
\n\u5c06\u4e8c\u8fdb\u5236\u6570\u636e\u8f6c\u6362\u4e3a\u5341\u516d\u8fdb\u5236\u8868\u793a<\/p>\n

\u7f51\u7edc\u53d1\u9001\u548c\u63a5\u6536\u5b89\u5168\u63aa\u65bd<\/h6>\n
\/\/<\/span>\u5b89\u5168\u5b89\u5fc3\u306a\u30c8\u30fc\u30af\u30f3\u3092\u4f5c\u6210<\/span>(<\/span>32<\/span>\u6841\u6570<\/span>)<\/span>\r\n$TOKEN_LENGTH<\/span> =<\/span> 16<\/span>;<\/span>\r\n$tokenByte<\/span> =<\/span> openssl_random_pseudo_bytes<\/span>(<\/span>$TOKEN_LENGTH<\/span>);<\/span>\r\n$csrfToken<\/span> =<\/span> bin2hex<\/span>(<\/span>$tokenByte<\/span>);<\/span>\r\n\r\n\/\/<\/span>\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u8a2d\u5b9a<\/span>\r\n$_SESSION<\/span>[<\/span>'csrfToken'<\/span>]<\/span> =<\/span> $csrfToken<\/span>;<\/span>\r\n<\/code><\/pre>\n
\/\/<\/span>form<\/span>\u306e<\/span>hidden<\/span>\u5024\u306b\u8a2d\u5b9a<\/span>\r\n<<\/span>input<\/span> type<\/span>=<\/span>'hidden'<\/span> name<\/span>=<\/span>'csrf'<\/span> value<\/span>=<\/span>'{$csrfToken}'<\/span>><\/span>\r\n<\/code><\/pre>\n
if<\/span> (<\/span>$_POST<\/span>[<\/span>'csrfToken'<\/span>]<\/span> ===<\/span> $_SESSION<\/span>[<\/span>'csrfToken'<\/span>])<\/span> {<\/span>\r\n  \/\/<\/span>\u6b63\u5e38\u51e6\u7406<\/span>\r\n}<\/span> else<\/span> {<\/span>\r\n  \/\/<\/span>CSRF<\/span>\u653b\u6483\u304c\u767a\u751f<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53c2\u8003\uff1a
\n\u30fbCSRF\u5b9a\u4e49\uff08WiKi\uff09
\n\u30fb\u653b\u51fb\u7684\u65b9\u6cd5\u548c\u7279\u5f81
\n\u30fb\u8bf7\u6c42\u5f3a\u5236\uff08CSRF\uff09\u5bf9\u7b56<\/p>\n
—\u6211\u559c\u6b22PHP (\uff61\uff65\u03c9\uff65\uff61)\uff89\u2661<\/p>\n","protected":false},"excerpt":{"rendered":"
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