{"id":8169,"date":"2024-03-14T07:39:42","date_gmt":"2024-03-14T07:39:42","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/"},"modified":"2025-08-03T01:26:33","modified_gmt":"2025-08-03T01:26:33","slug":"how-to-use-the-openssl-library-in-the-go-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/","title":{"rendered":"Using OpenSSL in Go"},"content":{"rendered":"<p>In Go language, using the OpenSSL library can be achieved by invoking C language interfaces. Initially, you need to install the CGO tool, import C language header and library files in the Go code, and then call the corresponding OpenSSL functions in the Go code.<\/p>\n<p>Here is a simple example code demonstrating how to perform encryption operations using the OpenSSL library in the Go language.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">package<\/span> main\r\n\r\n<span class=\"hljs-comment\">\/*\r\n#cgo LDFLAGS: -lssl -lcrypto\r\n#include &lt;openssl\/aes.h&gt;\r\n#include &lt;openssl\/rand.h&gt;\r\n#include &lt;openssl\/evp.h&gt;\r\n#include &lt;openssl\/sha.h&gt;\r\n*\/<\/span>\r\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">\"C\"<\/span>\r\n\r\n<span class=\"hljs-keyword\">import<\/span> (\r\n\t<span class=\"hljs-string\">\"fmt\"<\/span>\r\n\t<span class=\"hljs-string\">\"unsafe\"<\/span>\r\n)\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span><\/span> {\r\n\tkey := <span class=\"hljs-built_in\">make<\/span>([]<span class=\"hljs-type\">byte<\/span>, <span class=\"hljs-number\">32<\/span>)\r\n\tC.RAND_bytes((*C.uchar)(unsafe.Pointer(&amp;key[<span class=\"hljs-number\">0<\/span>])), C.<span class=\"hljs-type\">int<\/span>(<span class=\"hljs-built_in\">len<\/span>(key)))\r\n\r\n\ttext := []<span class=\"hljs-type\">byte<\/span>(<span class=\"hljs-string\">\"hello world\"<\/span>)\r\n\r\n\tencrypted := <span class=\"hljs-built_in\">make<\/span>([]<span class=\"hljs-type\">byte<\/span>, <span class=\"hljs-built_in\">len<\/span>(text))\r\n\tiv := <span class=\"hljs-built_in\">make<\/span>([]<span class=\"hljs-type\">byte<\/span>, C.EVP_MAX_IV_LENGTH)\r\n\r\n\tC.EVP_CIPHER_CTX_new()\r\n\tctx := C.EVP_CIPHER_CTX_new()\r\n\tC.EVP_EncryptInit_ex(ctx, C.EVP_aes_256_cbc(), <span class=\"hljs-literal\">nil<\/span>, (*C.uchar)(unsafe.Pointer(&amp;key[<span class=\"hljs-number\">0<\/span>])), (*C.uchar)(unsafe.Pointer(&amp;iv[<span class=\"hljs-number\">0<\/span>])))\r\n\tC.EVP_EncryptUpdate(ctx, (*C.uchar)(unsafe.Pointer(&amp;encrypted[<span class=\"hljs-number\">0<\/span>])), (*C.<span class=\"hljs-type\">int<\/span>)(unsafe.Pointer(C.<span class=\"hljs-type\">int<\/span>(<span class=\"hljs-built_in\">len<\/span>(encrypted)))), (*C.uchar)(unsafe.Pointer(&amp;text[<span class=\"hljs-number\">0<\/span>])), C.<span class=\"hljs-type\">int<\/span>(<span class=\"hljs-built_in\">len<\/span>(text)))\r\n\r\n\tfmt.Printf(<span class=\"hljs-string\">\"Encrypted: %x\\n\"<\/span>, encrypted)\r\n\r\n\tdecrypted := <span class=\"hljs-built_in\">make<\/span>([]<span class=\"hljs-type\">byte<\/span>, <span class=\"hljs-built_in\">len<\/span>(text))\r\n\r\n\tC.EVP_DecryptInit_ex(ctx, C.EVP_aes_256_cbc(), <span class=\"hljs-literal\">nil<\/span>, (*C.uchar)(unsafe.Pointer(&amp;key[<span class=\"hljs-number\">0<\/span>])), (*C.uchar)(unsafe.Pointer(&amp;iv[<span class=\"hljs-number\">0<\/span>])))\r\n\tC.EVP_DecryptUpdate(ctx, (*C.uchar)(unsafe.Pointer(&amp;decrypted[<span class=\"hljs-number\">0<\/span>])), (*C.<span class=\"hljs-type\">int<\/span>)(unsafe.Pointer(C.<span class=\"hljs-type\">int<\/span>(<span class=\"hljs-built_in\">len<\/span>(decrypted))), (*C.uchar)(unsafe.Pointer(&amp;encrypted[<span class=\"hljs-number\">0<\/span>])), C.<span class=\"hljs-type\">int<\/span>(<span class=\"hljs-built_in\">len<\/span>(encrypted)))\r\n\r\n\tfmt.Printf(<span class=\"hljs-string\">\"Decrypted: %s\\n\"<\/span>, decrypted)\r\n}\r\n<\/code><\/pre>\n<p>Please note that this is just a simple example code and not complete. For actual projects, it is recommended to learn how to correctly use the OpenSSL library through more detailed documentation and example codes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Go language, using the OpenSSL library can be achieved by invoking C language interfaces. Initially, you need to install the CGO tool, import C language header and library files in the Go code, and then call the corresponding OpenSSL functions in the Go code. Here is a simple example code demonstrating how to perform [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[10828,7,4095,10829,5336],"class_list":["post-8169","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-cgo","tag-encryption","tag-go-programming","tag-go-security","tag-openssl"],"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>Using OpenSSL in Go - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to integrate OpenSSL library in Go using CGO. Step-by-step guide with code examples for encryption operations.\" \/>\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\/blog\/how-to-use-the-openssl-library-in-the-go-language\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using OpenSSL in Go\" \/>\n<meta property=\"og:description\" content=\"Learn how to integrate OpenSSL library in Go using CGO. Step-by-step guide with code examples for encryption operations.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-14T07:39:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-03T01:26:33+00:00\" \/>\n<meta name=\"author\" content=\"Noah Thompson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Noah Thompson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/\"},\"author\":{\"name\":\"Noah Thompson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/2e83cc6ab9f60d36921c2d0f9f280f4a\"},\"headline\":\"Using OpenSSL in Go\",\"datePublished\":\"2024-03-14T07:39:42+00:00\",\"dateModified\":\"2025-08-03T01:26:33+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/\"},\"wordCount\":104,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"CGO\",\"encryption\",\"Go programming\",\"Go security\",\"OpenSSL\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-openssl-library-in-the-go-language\/\",\"name\":\"Using OpenSSL in Go - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-14T07:39:42+00:00\",\"dateModified\":\"2025-08-03T01:26:33+00:00\",\"description\":\"Learn how to integrate OpenSSL library in Go using CGO. 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