123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185 |
- <!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 `OsRng` struct in crate `rand`.">
- <meta name="keywords" content="rust, rustlang, rust-lang, OsRng">
- <title>rand::os::OsRng - 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="../../dark.css">
- <link rel="stylesheet" type="text/css" href="../../main.css" id="themeStyle">
- <script src="../../storage.js"></script>
-
- <link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico">
-
- </head>
- <body class="rustdoc struct">
- <!--[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='../../rand/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk.png' alt='logo' width='100'></a>
- <p class='location'>Struct OsRng</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Rng">Rng</a><a href="#impl-Debug">Debug</a></div></div><p class='location'><a href='../index.html'>rand</a>::<wbr><a href='index.html'>os</a></p><script>window.sidebarCurrent = {name: 'OsRng', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
- </nav>
- <div class="theme-picker">
- <button id="theme-picker" aria-label="Pick another theme!">
- <img src="../../brush.svg" width="18" alt="Pick another theme!">
- </button>
- <div id="theme-choices"></div>
- </div>
- <script src="../../theme.js"></script>
- <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">
- <h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>rand</a>::<wbr><a href='index.html'>os</a>::<wbr><a class="struct" href=''>OsRng</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/rand/os.rs.html#35' title='goto source code'>[src]</a></span></h1>
- <pre class='rust struct'>pub struct OsRng(_);</pre><div class='docblock'><p>A random number generator that retrieves randomness straight from
- the operating system. Platform sources:</p>
- <ul>
- <li>Unix-like systems (Linux, Android, Mac OSX): read directly from
- <code>/dev/urandom</code>, or from <code>getrandom(2)</code> system call if available.</li>
- <li>OpenBSD: calls <code>getentropy(2)</code></li>
- <li>FreeBSD: uses the <code>kern.arandom</code> <code>sysctl(2)</code> mib</li>
- <li>Windows: calls <code>RtlGenRandom</code>, exported from <code>advapi32.dll</code> as
- <code>SystemFunction036</code>.</li>
- <li>iOS: calls SecRandomCopyBytes as /dev/(u)random is sandboxed.</li>
- <li>PNaCl: calls into the <code>nacl-irt-random-0.1</code> IRT interface.</li>
- </ul>
- <p>This usually does not block. On some systems (e.g. FreeBSD, OpenBSD,
- Max OS X, and modern Linux) this may block very early in the init
- process, if the CSPRNG has not been seeded yet.[1]</p>
- <p>[1] See <a href="https://www.python.org/dev/peps/pep-0524/">https://www.python.org/dev/peps/pep-0524/</a> for a more
- in-depth discussion.</p>
- </div>
- <h2 id='methods' class='small-section-header'>
- Methods<a href='#methods' class='anchor'></a>
- </h2>
- <h3 id='impl' class='impl'><span class='in-band'><code>impl <a class="struct" href="../../rand/os/struct.OsRng.html" title="struct rand::os::OsRng">OsRng</a></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#37-42' title='goto source code'>[src]</a></span></h3>
- <div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><code>pub fn <a href='#method.new' class='fnname'>new</a>() -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="struct" href="../../rand/os/struct.OsRng.html" title="struct rand::os::OsRng">OsRng</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#39-41' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Create a new <code>OsRng</code>.</p>
- </div></div>
- <h2 id='implementations' class='small-section-header'>
- Trait Implementations<a href='#implementations' class='anchor'></a>
- </h2>
- <h3 id='impl-Rng' class='impl'><span class='in-band'><code>impl <a class="trait" href="../../rand/trait.Rng.html" title="trait rand::Rng">Rng</a> for <a class="struct" href="../../rand/os/struct.OsRng.html" title="struct rand::os::OsRng">OsRng</a></code><a href='#impl-Rng' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#44-48' title='goto source code'>[src]</a></span></h3>
- <div class='impl-items'><h4 id='method.next_u32' class="method"><span id='next_u32.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#tymethod.next_u32' class='fnname'>next_u32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#45' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return the next random u32. <a href="../../rand/trait.Rng.html#tymethod.next_u32">Read more</a></p>
- </div><h4 id='method.next_u64' class="method"><span id='next_u64.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.next_u64' class='fnname'>next_u64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#46' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return the next random u64. <a href="../../rand/trait.Rng.html#method.next_u64">Read more</a></p>
- </div><h4 id='method.fill_bytes' class="method"><span id='fill_bytes.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.fill_bytes' class='fnname'>fill_bytes</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#47' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Fill <code>dest</code> with random data. <a href="../../rand/trait.Rng.html#method.fill_bytes">Read more</a></p>
- </div><h4 id='method.next_f32' class="method"><span id='next_f32.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.next_f32' class='fnname'>next_f32</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#383-389' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return the next random f32 selected from the half-open interval <code>[0, 1)</code>. <a href="../../rand/trait.Rng.html#method.next_f32">Read more</a></p>
- </div><h4 id='method.next_f64' class="method"><span id='next_f64.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.next_f64' class='fnname'>next_f64</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#401-407' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return the next random f64 selected from the half-open interval <code>[0, 1)</code>. <a href="../../rand/trait.Rng.html#method.next_f64">Read more</a></p>
- </div><h4 id='method.gen' class="method"><span id='gen.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.gen' class='fnname'>gen</a><T: <a class="trait" href="../../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>>(&mut self) -> T <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#473-475' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return a random value of a <code>Rand</code> type. <a href="../../rand/trait.Rng.html#method.gen">Read more</a></p>
- </div><h4 id='method.gen_iter' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="../../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, R></span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="../../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, R></h3><code class="content"><span class="where fmt-newline">impl<'a, T: <a class="trait" href="../../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>, R: <a class="trait" href="../../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="../../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, R></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = T;</span></code></div></div><span id='gen_iter.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.gen_iter' class='fnname'>gen_iter</a><'a, T: <a class="trait" href="../../rand/trait.Rand.html" title="trait rand::Rand">Rand</a>>(&'a mut self) -> <a class="struct" href="../../rand/struct.Generator.html" title="struct rand::Generator">Generator</a><'a, T, Self> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#491-493' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return an iterator that will yield an infinite number of randomly generated items. <a href="../../rand/trait.Rng.html#method.gen_iter">Read more</a></p>
- </div><h4 id='method.gen_range' class="method"><span id='gen_range.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.gen_range' class='fnname'>gen_range</a><T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialOrd.html" title="trait core::cmp::PartialOrd">PartialOrd</a> + <a class="trait" href="../../rand/distributions/range/trait.SampleRange.html" title="trait rand::distributions::range::SampleRange">SampleRange</a>>(&mut self, low: T, high: T) -> T <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#518-521' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Generate a random value in the range [<code>low</code>, <code>high</code>). <a href="../../rand/trait.Rng.html#method.gen_range">Read more</a></p>
- </div><h4 id='method.gen_weighted_bool' class="method"><span id='gen_weighted_bool.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.gen_weighted_bool' class='fnname'>gen_weighted_bool</a>(&mut self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#533-535' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return a bool with a 1 in n chance of true <a href="../../rand/trait.Rng.html#method.gen_weighted_bool">Read more</a></p>
- </div><h4 id='method.gen_ascii_chars' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="../../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, R></span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="../../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, R></h3><code class="content"><span class="where fmt-newline">impl<'a, R: <a class="trait" href="../../rand/trait.Rng.html" title="trait rand::Rng">Rng</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="../../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, R></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>;</span></code></div></div><span id='gen_ascii_chars.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.gen_ascii_chars' class='fnname'>gen_ascii_chars</a><'a>(&'a mut self) -> <a class="struct" href="../../rand/struct.AsciiGenerator.html" title="struct rand::AsciiGenerator">AsciiGenerator</a><'a, Self> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#547-549' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return an iterator of random characters from the set A-Z,a-z,0-9. <a href="../../rand/trait.Rng.html#method.gen_ascii_chars">Read more</a></p>
- </div><h4 id='method.choose' class="method"><span id='choose.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.choose' class='fnname'>choose</a><'a, T>(&mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a [T]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#565-571' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return a random element from <code>values</code>. <a href="../../rand/trait.Rng.html#method.choose">Read more</a></p>
- </div><h4 id='method.choose_mut' class="method"><span id='choose_mut.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.choose_mut' class='fnname'>choose_mut</a><'a, T>(&mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a mut [T]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#576-583' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Return a mutable pointer to a random element from <code>values</code>. <a href="../../rand/trait.Rng.html#method.choose_mut">Read more</a></p>
- </div><h4 id='method.shuffle' class="method"><span id='shuffle.v' class='invisible'><code>fn <a href='../../rand/trait.Rng.html#method.shuffle' class='fnname'>shuffle</a><T>(&mut self, values: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&mut [T]</a>) <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/lib.rs.html#602-610' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Shuffle a mutable slice in place. <a href="../../rand/trait.Rng.html#method.shuffle">Read more</a></p>
- </div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../../rand/os/struct.OsRng.html" title="struct rand::os::OsRng">OsRng</a></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#50-54' title='goto source code'>[src]</a></span></h3>
- <div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/rand/os.rs.html#51-53' title='goto source code'>[src]</a></span></h4>
- <div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
- </div></div></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><kbd>?</kbd></dt>
- <dd>Show this help dialog</dd>
- <dt><kbd>S</kbd></dt>
- <dd>Focus the search field</dd>
- <dt><kbd>↑</kbd></dt>
- <dd>Move up in search results</dd>
- <dt><kbd>↓</kbd></dt>
- <dd>Move down in search results</dd>
- <dt><kbd>↹</kbd></dt>
- <dd>Switch tab</dd>
- <dt><kbd>⏎</kbd></dt>
- <dd>Go to active search result</dd>
- <dt><kbd>+</kbd></dt>
- <dd>Expand all sections</dd>
- <dt><kbd>-</kbd></dt>
- <dd>Collapse 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 = "../../";
- window.currentCrate = "rand";
- </script>
- <script src="../../main.js"></script>
- <script defer src="../../search-index.js"></script>
- </body>
- </html>
|