{"id":102479,"date":"2024-03-22T05:27:30","date_gmt":"2024-03-21T20:27:30","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e6%9a%97%e5%8f%b7%e5%8c%96%e3%83%bb%e5%be%a9%e5%8f%b7%e5%8c%96%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-27T21:41:56","modified_gmt":"2024-03-27T12:41:56","slug":"c%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e6%9a%97%e5%8f%b7%e5%8c%96%e3%83%bb%e5%be%a9%e5%8f%b7%e5%8c%96%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e6%9a%97%e5%8f%b7%e5%8c%96%e3%83%bb%e5%be%a9%e5%8f%b7%e5%8c%96%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95\/","title":{"rendered":"C++\u30d5\u30a1\u30a4\u30eb\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u5316\u306e\u5b9f\u88c5\u65b9\u6cd5"},"content":{"rendered":"<p>C++\u3067\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u5316\u306b\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u7684\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u306fAES\uff08Advanced Encryption Standard\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001AES\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u6697\u53f7\u5316\u304a\u3088\u3073\u5fa9\u53f7\u5316\u3059\u308b\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/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;fstream&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\/aes.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">int<\/span> AES_KEY_LENGTH = <span class=\"hljs-number\">128<\/span>; <span class=\"hljs-comment\">\/\/ \u4f7f\u7528128\u4f4d\u7684AES\u52a0\u5bc6<\/span>\r\n\r\n<span class=\"hljs-function\">std::string <span class=\"hljs-title\">encryptFile<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">const<\/span> std::string&amp; inputFile, <span class=\"hljs-type\">const<\/span> std::string&amp; outputFile, <span class=\"hljs-type\">const<\/span> std::string&amp; key)<\/span> <\/span>{\r\n    <span class=\"hljs-function\">std::ifstream <span class=\"hljs-title\">fin<\/span><span class=\"hljs-params\">(inputFile, std::ios::binary)<\/span><\/span>;\r\n    <span class=\"hljs-function\">std::ofstream <span class=\"hljs-title\">fout<\/span><span class=\"hljs-params\">(outputFile, std::ios::binary)<\/span><\/span>;\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6eAES\u52a0\u5bc6\u5bc6\u94a5<\/span>\r\n    AES_KEY aesKey;\r\n    <span class=\"hljs-built_in\">AES_set_encrypt_key<\/span>((<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span>*)key.<span class=\"hljs-built_in\">c_str<\/span>(), AES_KEY_LENGTH, &amp;aesKey);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u52a0\u5bc6\u6587\u4ef6<\/span>\r\n    <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span> inBuffer[AES_BLOCK_SIZE];\r\n    <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span> outBuffer[AES_BLOCK_SIZE];\r\n\r\n    <span class=\"hljs-keyword\">while<\/span> (fin.<span class=\"hljs-built_in\">read<\/span>((<span class=\"hljs-type\">char<\/span>*)inBuffer, AES_BLOCK_SIZE)) {\r\n        <span class=\"hljs-built_in\">AES_encrypt<\/span>(inBuffer, outBuffer, &amp;aesKey);\r\n        fout.<span class=\"hljs-built_in\">write<\/span>((<span class=\"hljs-type\">char<\/span>*)outBuffer, AES_BLOCK_SIZE);\r\n    }\r\n\r\n    fin.<span class=\"hljs-built_in\">close<\/span>();\r\n    fout.<span class=\"hljs-built_in\">close<\/span>();\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> outputFile;\r\n}\r\n\r\n<span class=\"hljs-function\">std::string <span class=\"hljs-title\">decryptFile<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">const<\/span> std::string&amp; inputFile, <span class=\"hljs-type\">const<\/span> std::string&amp; outputFile, <span class=\"hljs-type\">const<\/span> std::string&amp; key)<\/span> <\/span>{\r\n    <span class=\"hljs-function\">std::ifstream <span class=\"hljs-title\">fin<\/span><span class=\"hljs-params\">(inputFile, std::ios::binary)<\/span><\/span>;\r\n    <span class=\"hljs-function\">std::ofstream <span class=\"hljs-title\">fout<\/span><span class=\"hljs-params\">(outputFile, std::ios::binary)<\/span><\/span>;\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6eAES\u89e3\u5bc6\u5bc6\u94a5<\/span>\r\n    AES_KEY aesKey;\r\n    <span class=\"hljs-built_in\">AES_set_decrypt_key<\/span>((<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span>*)key.<span class=\"hljs-built_in\">c_str<\/span>(), AES_KEY_LENGTH, &amp;aesKey);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u89e3\u5bc6\u6587\u4ef6<\/span>\r\n    <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span> inBuffer[AES_BLOCK_SIZE];\r\n    <span class=\"hljs-type\">unsigned<\/span> <span class=\"hljs-type\">char<\/span> outBuffer[AES_BLOCK_SIZE];\r\n\r\n    <span class=\"hljs-keyword\">while<\/span> (fin.<span class=\"hljs-built_in\">read<\/span>((<span class=\"hljs-type\">char<\/span>*)inBuffer, AES_BLOCK_SIZE)) {\r\n        <span class=\"hljs-built_in\">AES_decrypt<\/span>(inBuffer, outBuffer, &amp;aesKey);\r\n        fout.<span class=\"hljs-built_in\">write<\/span>((<span class=\"hljs-type\">char<\/span>*)outBuffer, AES_BLOCK_SIZE);\r\n    }\r\n\r\n    fin.<span class=\"hljs-built_in\">close<\/span>();\r\n    fout.<span class=\"hljs-built_in\">close<\/span>();\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> outputFile;\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 inputFile = <span class=\"hljs-string\">\"input.txt\"<\/span>;\r\n    std::string encryptedFile = <span class=\"hljs-string\">\"encrypted.txt\"<\/span>;\r\n    std::string decryptedFile = <span class=\"hljs-string\">\"decrypted.txt\"<\/span>;\r\n    std::string key = <span class=\"hljs-string\">\"mykey1234567890\"<\/span>; <span class=\"hljs-comment\">\/\/ \u5bc6\u94a5<\/span>\r\n\r\n    <span class=\"hljs-built_in\">encryptFile<\/span>(inputFile, encryptedFile, key);\r\n    <span class=\"hljs-built_in\">decryptFile<\/span>(encryptedFile, decryptedFile, key);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>OpenSSL\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u306eAES\u95a2\u6570\u304c\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002encryptFile\u95a2\u6570\u306f\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u3001\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u3001\u9375\u3092\u53d7\u3051\u53d6\u308a\u3001\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u6697\u53f7\u5316\u3057\u3066\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002decryptFile\u95a2\u6570\u306f\u6697\u53f7\u5316\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u3001\u5fa9\u53f7\u5316\u5f8c\u306e\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u3001\u9375\u3092\u53d7\u3051\u53d6\u308a\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u5fa9\u53f7\u5316\u3057\u3066\u5fa9\u53f7\u5316\u5f8c\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u3001AES\u306e\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u3060\u3051\u3092\u793a\u3059\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5b9f\u969b\u306b\u306f\u3001\u30ad\u30fc\u306e\u751f\u6210\u3068\u683c\u7d0d\u3001\u6697\u53f7\u5316\u30e2\u30fc\u30c9\u306e\u9078\u629e\u306a\u3069\u3001\u3055\u3089\u306b\u591a\u304f\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u554f\u984c\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++\u3067\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u5316\u306b\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 \u4e00\u822c\u7684\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u306fAES\uff08Advanced Encryption Standard\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001AES\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-102479","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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++\u30d5\u30a1\u30a4\u30eb\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u5316\u306e\u5b9f\u88c5\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/c\u30d5\u30a1\u30a4\u30eb\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u5316\u306e\u5b9f\u88c5\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++\u30d5\u30a1\u30a4\u30eb\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u5316\u306e\u5b9f\u88c5\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"C++\u3067\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u5316\u306b\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 \u4e00\u822c\u7684\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u306fAES\uff08Advanced Encryption Standard\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001AES\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1 [&hellip;]\" 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