{"id":10201,"date":"2024-03-15T04:32:35","date_gmt":"2024-03-14T19:32:35","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7md5%e6%9a%97%e5%8f%b7%e5%8c%96%e3%82%a2%e3%83%ab%e3%82%b4%e3%83%aa%e3%82%ba%e3%83%a0%e3%82%92%e5%ae%9f%e8%a3%85%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99\/"},"modified":"2025-08-05T01:59:48","modified_gmt":"2025-08-04T16:59:48","slug":"c%e3%81%a7md5%e6%9a%97%e5%8f%b7%e5%8c%96%e3%82%a2%e3%83%ab%e3%82%b4%e3%83%aa%e3%82%ba%e3%83%a0%e3%82%92%e5%ae%9f%e8%a3%85%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7md5%e6%9a%97%e5%8f%b7%e5%8c%96%e3%82%a2%e3%83%ab%e3%82%b4%e3%83%aa%e3%82%ba%e3%83%a0%e3%82%92%e5%ae%9f%e8%a3%85%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99\/","title":{"rendered":"C++\u3067MD5\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>C++\u3067MD5\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u65e2\u5b58\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u81ea\u5206\u3067\u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4ee5\u4e0b\u306fMD5\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306e\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;string&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;openssl\/md5.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\">std::string <span class=\"hljs-title\">md5<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">const<\/span> std::string&amp; input)<\/span> <\/span>{\r\n    <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span> digest[MD5_DIGEST_LENGTH];\r\n    <span class=\"hljs-built_in\">MD5<\/span>((<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span>*)input.<span class=\"hljs-built_in\">c_str<\/span>(), input.<span class=\"hljs-built_in\">length<\/span>(), digest);\r\n\r\n    <span class=\"hljs-type\">char<\/span> mdString[<span class=\"hljs-number\">33<\/span>];\r\n    <span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-type\">int<\/span> i = <span class=\"hljs-number\">0<\/span>; i &lt; <span class=\"hljs-number\">16<\/span>; i++) {\r\n        <span class=\"hljs-built_in\">sprintf<\/span>(&amp;mdString[i*<span class=\"hljs-number\">2<\/span>], <span class=\"hljs-string\">\"%02x\"<\/span>, (<span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">int<\/span>)digest[i]);\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> mdString;\r\n}\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    std::string input = <span class=\"hljs-string\">\"Hello, World!\"<\/span>;\r\n    std::string md5Result = <span class=\"hljs-built_in\">md5<\/span>(input);\r\n\r\n    std::cout &lt;&lt; <span class=\"hljs-string\">\"MD5 of '\"<\/span> &lt;&lt; input &lt;&lt; <span class=\"hljs-string\">\"' is: \"<\/span> &lt;&lt; md5Result &lt;&lt; std::endl;\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001OpenSSL\u30e9\u30a4\u30d6\u30e9\u30ea\u306eMD5\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u5165\u529b\u6587\u5b57\u5217\u306eMD5\u5024\u3092\u8a08\u7b97\u3057\u3066\u3044\u307e\u3059\u3002md5\u95a2\u6570\u306b\u6697\u53f7\u5316\u3057\u305f\u3044\u6587\u5b57\u5217\u3092\u6e21\u3059\u3068\u3001MD5\u6697\u53f7\u5316\u3055\u308c\u305f\u7d50\u679c\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002main\u95a2\u6570\u3067\u306f\u3001&#8221;Hello, World!&#8221;\u6587\u5b57\u5217\u306eMD5\u7d50\u679c\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>OpenSSL\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u306fOpenSSL\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30ea\u30f3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30fc\u30c9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>g++ -o md5_example md5_example.cpp -lssl -lcrypto\r\n<\/code><\/pre>\n<p>C++\u3067MD5\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++\u3067MD5\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u65e2\u5b58\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u81ea\u5206\u3067\u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4ee5\u4e0b\u306fMD5\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306e\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\uff1a #include &lt;iostream&#038; [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-10201","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"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>C++\u3067MD5\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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