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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Rivest–Shamir–Adleman cryptosystem"><title>openssl::rsa - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-42caa33d.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="openssl" data-themes="" data-resource-suffix="" data-rustdoc-version="1.84.1 (e71f9a9a9 2025-01-27)" data-channel="1.84.1" data-search-js="search-92e6798f.js" data-settings-js="settings-0f613d39.js" ><script src="../../static.files/storage-59e33391.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../openssl/index.html">openssl</a><span class="version">0.10.68</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module rsa</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#example" title="Example">Example</a></li></ul><h3><a href="#structs">Module Items</a></h3><ul class="block"><li><a href="#structs" title="Structs">Structs</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="../index.html">In crate openssl</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="../index.html">openssl</a></span><h1>Module <span>rsa</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/openssl/rsa.rs.html#1-873">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Rivest–Shamir–Adleman cryptosystem</p>
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<p>RSA is one of the earliest asymmetric public key encryption schemes.
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Like many other cryptosystems, RSA relies on the presumed difficulty of a hard
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mathematical problem, namely factorization of the product of two large prime
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numbers. At the moment there does not exist an algorithm that can factor such
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large numbers in reasonable time. RSA is used in a wide variety of
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applications including digital signatures and key exchanges such as
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establishing a TLS/SSL connection.</p>
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<p>The RSA acronym is derived from the first letters of the surnames of the
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algorithm’s founding trio.</p>
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<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
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<p>Generate a 2048-bit RSA key pair and use the public key to encrypt some data.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>openssl::rsa::{Rsa, Padding};
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<span class="kw">let </span>rsa = Rsa::generate(<span class="number">2048</span>).unwrap();
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<span class="kw">let </span>data = <span class="string">b"foobar"</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>buf = <span class="macro">vec!</span>[<span class="number">0</span>; rsa.size() <span class="kw">as </span>usize];
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<span class="kw">let </span>encrypted_len = rsa.public_encrypt(data, <span class="kw-2">&mut </span>buf, Padding::PKCS1).unwrap();</code></pre></div>
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</div></details><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="struct" href="struct.Padding.html" title="struct openssl::rsa::Padding">Padding</a></div><div class="desc docblock-short">Type of encryption padding to use.</div></li><li><div class="item-name"><a class="struct" href="struct.Rsa.html" title="struct openssl::rsa::Rsa">Rsa</a></div><div class="desc docblock-short">An RSA key.</div></li><li><div class="item-name"><a class="struct" href="struct.RsaPrivateKeyBuilder.html" title="struct openssl::rsa::RsaPrivateKeyBuilder">RsaPrivate<wbr>KeyBuilder</a></div></li><li><div class="item-name"><a class="struct" href="struct.RsaRef.html" title="struct openssl::rsa::RsaRef">RsaRef</a></div><div class="desc docblock-short">Reference to <code>RSA</code></div></li></ul></section></div></main></body></html> |