{"id":6137,"date":"2024-03-14T17:05:30","date_gmt":"2024-03-14T08:05:30","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/php%e3%81%aeopenssl_decrypt%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%ef%bc%9f\/"},"modified":"2025-08-03T07:26:25","modified_gmt":"2025-08-02T22:26:25","slug":"php%e3%81%aeopenssl_decrypt%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/php%e3%81%aeopenssl_decrypt%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%ef%bc%9f\/","title":{"rendered":"PHP openssl_decrypt\u95a2\u6570\uff1a\u6697\u53f7\u5316\u89e3\u9664\u306e\u57fa\u672c\u3068\u5b9f\u8df5"},"content":{"rendered":"<p>PHP\u306e\u4e2d\u3067\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u5fa9\u53f7\u5316\u3059\u308b\u305f\u3081\u306bopenssl_decrypt\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-title function_ invoke__\">openssl_decrypt<\/span> ( <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$data<\/span> , <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$method<\/span> , <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$key<\/span> [, <span class=\"hljs-keyword\">int<\/span> <span class=\"hljs-variable\">$options<\/span> = <span class=\"hljs-number\">0<\/span> [, <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$iv<\/span> = <span class=\"hljs-string\">\"\"<\/span> [, <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$tag<\/span> = <span class=\"hljs-string\">\"\"<\/span> [, <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$aad<\/span> = <span class=\"hljs-string\">\"\"<\/span> [, <span class=\"hljs-keyword\">int<\/span> <span class=\"hljs-variable\">$tag_length<\/span> = <span class=\"hljs-number\">16<\/span> ]]]]] )\r\n<\/code><\/pre>\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8aac\u660e\uff1a<\/p>\n<ol>\n<li>\u30c7\u30fc\u30bf\uff1a\u89e3\u8aad\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u30c7\u30fc\u30bf<\/li>\n<li>\u65b9\u5f0f\uff1a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/li>\n<li>\u9375\uff1a\u6697\u53f7\u3092\u89e3\u8aad\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u9375<\/li>\n<li>\u6697\u53f7\u5316\u30aa\u30d7\u30b7\u30e7\u30f3\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306f0\uff09<\/li>\n<li>IV\uff1a\u521d\u671f\u5316\u30d9\u30af\u30c8\u30eb\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u7a7a\u306e\u6587\u5b57\u5217\uff09<\/li>\n<li>tag\uff1a\u8a8d\u8a3c\u30bf\u30b0\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u7a7a\u306e\u6587\u5b57\u5217\uff09<\/li>\n<li>aad: \u8ffd\u52a0\u8a8d\u8a3c\u30c7\u30fc\u30bf\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u7a7a\u6587\u5b57\u5217\uff09<\/li>\n<li>tag_length: \u8a8d\u8a3c\u30bf\u30b0\u306e\u9577\u3055\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306f16\uff09<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u306e\u6587\u7ae0\u3092\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>&#8220;Can you please lend me your book?&#8221;<\/p>\n<p>&#8220;\u3042\u306a\u305f\u306e\u672c\u3092\u8cb8\u3057\u3066\u3082\u3089\u3048\u307e\u305b\u3093\u304b\uff1f&#8221;<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-variable\">$encrypted_data<\/span> = <span class=\"hljs-string\">\"U2FsdGVkX1+m3l8g5dO\/TDCBQZgZ6QwH9L3soBUXKo=\"<\/span>;\r\n<span class=\"hljs-variable\">$key<\/span> = <span class=\"hljs-string\">\"mysecretkey\"<\/span>;\r\n<span class=\"hljs-variable\">$method<\/span> = <span class=\"hljs-string\">\"AES-256-CBC\"<\/span>;\r\n<span class=\"hljs-variable\">$decrypted_data<\/span> = <span class=\"hljs-title function_ invoke__\">openssl_decrypt<\/span>(<span class=\"hljs-variable\">$encrypted_data<\/span>, <span class=\"hljs-variable\">$method<\/span>, <span class=\"hljs-variable\">$key<\/span>, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-string\">\"1234567890123456\"<\/span>);\r\n\r\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-variable\">$decrypted_data<\/span>;\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001AES-256-CBC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068&#8221;mysecretkey&#8221;\u3068\u3044\u3046\u30ad\u30fc\u3092\u4f7f\u7528\u3057\u3066\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u5fa9\u53f7\u5316\u3057\u307e\u3057\u305f\u3002\u307e\u305f\u300116\u30d0\u30a4\u30c8\u306e\u521d\u671f\u5316\u30d9\u30af\u30c8\u30eb\u3082\u63d0\u4f9b\u3057\u307e\u3057\u305f\u3002\u5fa9\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306f\u3001$decrypted_data\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u306e\u4e2d\u3067\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u5fa9\u53f7\u5316\u3059\u308b\u305f\u3081\u306bopenssl_decrypt\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a string openssl_decrypt ( string $d [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1647,161,19,1648,249],"class_list":["post-6137","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-openssl_decrypt","tag-php","tag-19","tag-1648","tag-249"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PHP openssl_decrypt\u95a2\u6570\uff1a\u6697\u53f7\u5316\u89e3\u9664\u306e\u57fa\u672c\u3068\u5b9f\u8df5 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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