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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="API documentation for the Rust `rsa` mod in crate `openssl`."><meta name="keywords" content="rust, rustlang, rust-lang, rsa"><title>openssl::rsa - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../openssl/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Module rsa</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li></ul></div><p class="location"><a href="../index.html">openssl</a></p><div id="sidebar-vars" data-name="rsa" data-ty="mod" data-relpath="../"></div><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Module <a href="../index.html">openssl</a>::<wbr><a class="mod" href="">rsa</a></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../../src/openssl/rsa.rs.html#1-923" title="goto source code">[src]</a></span></h1><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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<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
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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">
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<span class="kw">use</span> <span class="ident">openssl</span>::<span class="ident">rsa</span>::{<span class="ident">Rsa</span>, <span class="ident">Padding</span>};
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<span class="kw">let</span> <span class="ident">rsa</span> <span class="op">=</span> <span class="ident">Rsa</span>::<span class="ident">generate</span>(<span class="number">2048</span>).<span class="ident">unwrap</span>();
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<span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="string">b"foobar"</span>;
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>; <span class="ident">rsa</span>.<span class="ident">size</span>() <span class="kw">as</span> <span class="ident">usize</span>];
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<span class="kw">let</span> <span class="ident">encrypted_len</span> <span class="op">=</span> <span class="ident">rsa</span>.<span class="ident">public_encrypt</span>(<span class="ident">data</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>, <span class="ident">Padding</span>::<span class="ident">PKCS1</span>).<span class="ident">unwrap</span>();</pre></div>
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</div><h2 id="structs" class="section-header"><a href="#structs">Structs</a></h2>
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<table><tr class="module-item"><td><a class="struct" href="struct.Padding.html" title="openssl::rsa::Padding struct">Padding</a></td><td class="docblock-short"><p>Type of encryption padding to use.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.Rsa.html" title="openssl::rsa::Rsa struct">Rsa</a></td><td class="docblock-short"><p>An RSA key.</p>
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</td></tr><tr class="module-item"><td><a class="struct" href="struct.RsaPrivateKeyBuilder.html" title="openssl::rsa::RsaPrivateKeyBuilder struct">RsaPrivateKeyBuilder</a></td><td class="docblock-short"></td></tr><tr class="module-item"><td><a class="struct" href="struct.RsaRef.html" title="openssl::rsa::RsaRef struct">RsaRef</a></td><td class="docblock-short"><p>Reference to <code>RSA</code></p>
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