mCaptcha/mcaptcha_browser/fn.gen_pow.html

35 lines
7.4 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!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="generate proof-of-work"><meta name="keywords" content="rust, rustlang, rust-lang, gen_pow"><title>gen_pow in mcaptcha_browser - 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><script src="../crates.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../favicon.svg">
<link rel="alternate icon" type="image/png" href="../favicon-16x16.png">
<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 fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">&#9776;</div><a href='../mcaptcha_browser/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><h2 class="location">Other items in<br><a href="index.html">mcaptcha_browser</a></h2><div id="sidebar-vars" data-name="gen_pow" data-ty="fn" 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" title="themes"><img src="../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><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" id="help-button" title="help">?</button><a id="settings-menu" href="../settings.html" title="settings"><img src="../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Function <a href="index.html">mcaptcha_browser</a>::<wbr><a class="fn" href="#">gen_pow</a><button id="copy-path" onclick="copy_path(this)" title="copy path"><img src="../clipboard.svg" width="19" height="18" alt="Copy item import" title="Copy item import to clipboard"></button></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">&#x2212;</span>]</a></span><a class="srclink" href="../src/mcaptcha_browser/lib.rs.html#119-126" title="goto source code">[src]</a></span></h1><pre class="rust fn">pub fn gen_pow(salt: <a class="struct" href="https://doc.rust-lang.org/1.54.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>, phrase: <a class="struct" href="https://doc.rust-lang.org/1.54.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>, difficulty_factor: <a class="primitive" href="https://doc.rust-lang.org/1.54.0/std/primitive.u32.html">u32</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.54.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></pre><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>generate proof-of-work</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">use</span> <span class="ident">mcaptcha_browser</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">pow_sha256</span>::<span class="kw-2">*</span>;
<span class="comment">// salt using which PoW should be computed</span>
<span class="kw">const</span> <span class="ident">SALT</span>: <span class="kw-2">&amp;</span><span class="ident">str</span> <span class="op">=</span> <span class="string">&quot;yrandomsaltisnotlongenoug&quot;</span>;
<span class="comment">// one-time phrase over which PoW should be computed</span>
<span class="kw">const</span> <span class="ident">PHRASE</span>: <span class="kw-2">&amp;</span><span class="ident">str</span> <span class="op">=</span> <span class="string">&quot;ironmansucks&quot;</span>;
<span class="comment">// and the difficulty factor</span>
<span class="kw">const</span> <span class="ident">DIFFICULTY</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1000</span>;
<span class="comment">// currently gen_pow() returns a JSON formated string to better communicate</span>
<span class="comment">// with JavaScript. See [PoW&lt;T&gt;][pow_sha256::PoW] for schema</span>
<span class="kw">let</span> <span class="ident">serialised_work</span> <span class="op">=</span> <span class="ident">gen_pow</span>(<span class="ident">SALT</span>.<span class="ident">into</span>(), <span class="ident">PHRASE</span>.<span class="ident">into</span>(), <span class="ident">DIFFICULTY</span>);
<span class="kw">let</span> <span class="ident">work</span>: <span class="ident">Work</span> <span class="op">=</span> <span class="ident">serde_json::from_str</span>(<span class="kw-2">&amp;</span><span class="ident">serialised_work</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">work</span> <span class="op">=</span> <span class="ident">PoWBuilder::default</span>()
.<span class="ident">result</span>(<span class="ident">work</span>.<span class="ident">result</span>)
.<span class="ident">nonce</span>(<span class="ident">work</span>.<span class="ident">nonce</span>)
.<span class="ident">build</span>()
.<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">ConfigBuilder::default</span>().<span class="ident">salt</span>(<span class="ident">SALT</span>.<span class="ident">into</span>()).<span class="ident">build</span>().<span class="ident">unwrap</span>();
<span class="macro">assert!</span>(<span class="ident">config</span>.<span class="ident">is_valid_proof</span>(<span class="kw-2">&amp;</span><span class="ident">work</span>, <span class="kw-2">&amp;</span><span class="ident">PHRASE</span>.<span class="ident">to_string</span>()));
<span class="macro">assert!</span>(<span class="ident">config</span>.<span class="ident">is_sufficient_difficulty</span>(<span class="kw-2">&amp;</span><span class="ident">work</span>, <span class="ident">DIFFICULTY</span>));
}</pre></div>
</div></details></section><section id="search" class="content hidden"></section><div id="rustdoc-vars" data-root-path="../" data-current-crate="mcaptcha_browser" data-search-index-js="../search-index.js" data-search-js="../search.js"></div><script src="../main.js"></script></body></html>