<!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="Source to the Rust file `/home/travis/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-0.7.14/src/crypto/rand.rs`."> <meta name="keywords" content="rust, rustlang, rust-lang"> <title>rand.rs.html -- source</title> <link rel="stylesheet" type="text/css" href="../../../rustdoc.css"> <link rel="stylesheet" type="text/css" href="../../../main.css"> </head> <body class="rustdoc"> <!--[if lte IE 8]> <div class="warning"> This old browser is unsupported and will most likely display funky things. </div> <![endif]--> <nav class="sidebar"> </nav> <nav class="sub"> <form class="search-form js-only"> <div class="search-container"> <input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"> </div> </form> </nav> <section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span id="21">21</span> <span id="22">22</span> <span id="23">23</span> <span id="24">24</span> <span id="25">25</span> <span id="26">26</span> <span id="27">27</span> <span id="28">28</span> <span id="29">29</span> </pre><pre class='rust '> <span class='kw'>use</span> <span class='ident'>libc</span>::<span class='ident'>c_int</span>; <span class='kw'>use</span> <span class='ident'>ffi</span>; <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>rand_bytes</span>(<span class='ident'>len</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> { <span class='kw'>unsafe</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>out</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>with_capacity</span>(<span class='ident'>len</span>); <span class='ident'>ffi</span>::<span class='ident'>init</span>(); <span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='ident'>ffi</span>::<span class='ident'>RAND_bytes</span>(<span class='ident'>out</span>.<span class='ident'>as_mut_ptr</span>(), <span class='ident'>len</span> <span class='kw'>as</span> <span class='ident'>c_int</span>); <span class='kw'>if</span> <span class='ident'>r</span> <span class='op'>!=</span> <span class='number'>1</span> <span class='kw'>as</span> <span class='ident'>c_int</span> { <span class='macro'>panic</span><span class='macro'>!</span>() } <span class='ident'>out</span>.<span class='ident'>set_len</span>(<span class='ident'>len</span>); <span class='ident'>out</span> } } <span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span> <span class='kw'>mod</span> <span class='ident'>tests</span> { <span class='kw'>use</span> <span class='kw'>super</span>::<span class='ident'>rand_bytes</span>; <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_rand_bytes</span>() { <span class='kw'>let</span> <span class='ident'>bytes</span> <span class='op'>=</span> <span class='ident'>rand_bytes</span>(<span class='number'>32</span>); <span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>"{:?}"</span>, <span class='ident'>bytes</span>); } } </pre> </section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt>?</dt> <dd>Show this help dialog</dd> <dt>S</dt> <dd>Focus the search field</dd> <dt>⇤</dt> <dd>Move up in search results</dd> <dt>⇥</dt> <dd>Move down in search results</dd> <dt>⏎</dt> <dd>Go to active search result</dd> <dt>+</dt> <dd>Collapse/expand all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../../../"; 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