<!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/dimitris/.cargo/registry/src/github.com-1ecc6299db9ec823/rust-crypto-0.2.36/src/sha1.rs`.">
<meta name="keywords" content="rust, rustlang, rust-lang">
<title>sha1.rs.html -- source</title>
<link rel="stylesheet" type="text/css" href="../../normalize.css">
<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>
<span id="30"> 30</span>
<span id="31"> 31</span>
<span id="32"> 32</span>
<span id="33"> 33</span>
<span id="34"> 34</span>
<span id="35"> 35</span>
<span id="36"> 36</span>
<span id="37"> 37</span>
<span id="38"> 38</span>
<span id="39"> 39</span>
<span id="40"> 40</span>
<span id="41"> 41</span>
<span id="42"> 42</span>
<span id="43"> 43</span>
<span id="44"> 44</span>
<span id="45"> 45</span>
<span id="46"> 46</span>
<span id="47"> 47</span>
<span id="48"> 48</span>
<span id="49"> 49</span>
<span id="50"> 50</span>
<span id="51"> 51</span>
<span id="52"> 52</span>
<span id="53"> 53</span>
<span id="54"> 54</span>
<span id="55"> 55</span>
<span id="56"> 56</span>
<span id="57"> 57</span>
<span id="58"> 58</span>
<span id="59"> 59</span>
<span id="60"> 60</span>
<span id="61"> 61</span>
<span id="62"> 62</span>
<span id="63"> 63</span>
<span id="64"> 64</span>
<span id="65"> 65</span>
<span id="66"> 66</span>
<span id="67"> 67</span>
<span id="68"> 68</span>
<span id="69"> 69</span>
<span id="70"> 70</span>
<span id="71"> 71</span>
<span id="72"> 72</span>
<span id="73"> 73</span>
<span id="74"> 74</span>
<span id="75"> 75</span>
<span id="76"> 76</span>
<span id="77"> 77</span>
<span id="78"> 78</span>
<span id="79"> 79</span>
<span id="80"> 80</span>
<span id="81"> 81</span>
<span id="82"> 82</span>
<span id="83"> 83</span>
<span id="84"> 84</span>
<span id="85"> 85</span>
<span id="86"> 86</span>
<span id="87"> 87</span>
<span id="88"> 88</span>
<span id="89"> 89</span>
<span id="90"> 90</span>
<span id="91"> 91</span>
<span id="92"> 92</span>
<span id="93"> 93</span>
<span id="94"> 94</span>
<span id="95"> 95</span>
<span id="96"> 96</span>
<span id="97"> 97</span>
<span id="98"> 98</span>
<span id="99"> 99</span>
<span id="100">100</span>
<span id="101">101</span>
<span id="102">102</span>
<span id="103">103</span>
<span id="104">104</span>
<span id="105">105</span>
<span id="106">106</span>
<span id="107">107</span>
<span id="108">108</span>
<span id="109">109</span>
<span id="110">110</span>
<span id="111">111</span>
<span id="112">112</span>
<span id="113">113</span>
<span id="114">114</span>
<span id="115">115</span>
<span id="116">116</span>
<span id="117">117</span>
<span id="118">118</span>
<span id="119">119</span>
<span id="120">120</span>
<span id="121">121</span>
<span id="122">122</span>
<span id="123">123</span>
<span id="124">124</span>
<span id="125">125</span>
<span id="126">126</span>
<span id="127">127</span>
<span id="128">128</span>
<span id="129">129</span>
<span id="130">130</span>
<span id="131">131</span>
<span id="132">132</span>
<span id="133">133</span>
<span id="134">134</span>
<span id="135">135</span>
<span id="136">136</span>
<span id="137">137</span>
<span id="138">138</span>
<span id="139">139</span>
<span id="140">140</span>
<span id="141">141</span>
<span id="142">142</span>
<span id="143">143</span>
<span id="144">144</span>
<span id="145">145</span>
<span id="146">146</span>
<span id="147">147</span>
<span id="148">148</span>
<span id="149">149</span>
<span id="150">150</span>
<span id="151">151</span>
<span id="152">152</span>
<span id="153">153</span>
<span id="154">154</span>
<span id="155">155</span>
<span id="156">156</span>
<span id="157">157</span>
<span id="158">158</span>
<span id="159">159</span>
<span id="160">160</span>
<span id="161">161</span>
<span id="162">162</span>
<span id="163">163</span>
<span id="164">164</span>
<span id="165">165</span>
<span id="166">166</span>
<span id="167">167</span>
<span id="168">168</span>
<span id="169">169</span>
<span id="170">170</span>
<span id="171">171</span>
<span id="172">172</span>
<span id="173">173</span>
<span id="174">174</span>
<span id="175">175</span>
<span id="176">176</span>
<span id="177">177</span>
<span id="178">178</span>
<span id="179">179</span>
<span id="180">180</span>
<span id="181">181</span>
<span id="182">182</span>
<span id="183">183</span>
<span id="184">184</span>
<span id="185">185</span>
<span id="186">186</span>
<span id="187">187</span>
<span id="188">188</span>
<span id="189">189</span>
<span id="190">190</span>
<span id="191">191</span>
<span id="192">192</span>
<span id="193">193</span>
<span id="194">194</span>
<span id="195">195</span>
<span id="196">196</span>
<span id="197">197</span>
<span id="198">198</span>
<span id="199">199</span>
<span id="200">200</span>
<span id="201">201</span>
<span id="202">202</span>
<span id="203">203</span>
<span id="204">204</span>
<span id="205">205</span>
<span id="206">206</span>
<span id="207">207</span>
<span id="208">208</span>
<span id="209">209</span>
<span id="210">210</span>
<span id="211">211</span>
<span id="212">212</span>
<span id="213">213</span>
<span id="214">214</span>
<span id="215">215</span>
<span id="216">216</span>
<span id="217">217</span>
<span id="218">218</span>
<span id="219">219</span>
<span id="220">220</span>
<span id="221">221</span>
<span id="222">222</span>
<span id="223">223</span>
<span id="224">224</span>
<span id="225">225</span>
<span id="226">226</span>
<span id="227">227</span>
<span id="228">228</span>
<span id="229">229</span>
<span id="230">230</span>
<span id="231">231</span>
<span id="232">232</span>
<span id="233">233</span>
<span id="234">234</span>
<span id="235">235</span>
<span id="236">236</span>
<span id="237">237</span>
<span id="238">238</span>
<span id="239">239</span>
<span id="240">240</span>
<span id="241">241</span>
<span id="242">242</span>
<span id="243">243</span>
<span id="244">244</span>
<span id="245">245</span>
<span id="246">246</span>
<span id="247">247</span>
<span id="248">248</span>
<span id="249">249</span>
<span id="250">250</span>
<span id="251">251</span>
<span id="252">252</span>
<span id="253">253</span>
<span id="254">254</span>
<span id="255">255</span>
<span id="256">256</span>
<span id="257">257</span>
<span id="258">258</span>
<span id="259">259</span>
<span id="260">260</span>
<span id="261">261</span>
<span id="262">262</span>
<span id="263">263</span>
<span id="264">264</span>
<span id="265">265</span>
<span id="266">266</span>
<span id="267">267</span>
<span id="268">268</span>
<span id="269">269</span>
<span id="270">270</span>
<span id="271">271</span>
<span id="272">272</span>
<span id="273">273</span>
<span id="274">274</span>
<span id="275">275</span>
<span id="276">276</span>
<span id="277">277</span>
<span id="278">278</span>
<span id="279">279</span>
<span id="280">280</span>
<span id="281">281</span>
<span id="282">282</span>
<span id="283">283</span>
<span id="284">284</span>
<span id="285">285</span>
<span id="286">286</span>
<span id="287">287</span>
<span id="288">288</span>
<span id="289">289</span>
<span id="290">290</span>
<span id="291">291</span>
<span id="292">292</span>
<span id="293">293</span>
<span id="294">294</span>
<span id="295">295</span>
<span id="296">296</span>
<span id="297">297</span>
<span id="298">298</span>
<span id="299">299</span>
<span id="300">300</span>
<span id="301">301</span>
<span id="302">302</span>
<span id="303">303</span>
<span id="304">304</span>
<span id="305">305</span>
<span id="306">306</span>
<span id="307">307</span>
<span id="308">308</span>
<span id="309">309</span>
<span id="310">310</span>
<span id="311">311</span>
<span id="312">312</span>
<span id="313">313</span>
<span id="314">314</span>
<span id="315">315</span>
<span id="316">316</span>
<span id="317">317</span>
<span id="318">318</span>
<span id="319">319</span>
<span id="320">320</span>
<span id="321">321</span>
<span id="322">322</span>
<span id="323">323</span>
<span id="324">324</span>
<span id="325">325</span>
<span id="326">326</span>
<span id="327">327</span>
<span id="328">328</span>
<span id="329">329</span>
<span id="330">330</span>
<span id="331">331</span>
<span id="332">332</span>
<span id="333">333</span>
<span id="334">334</span>
<span id="335">335</span>
<span id="336">336</span>
<span id="337">337</span>
<span id="338">338</span>
<span id="339">339</span>
<span id="340">340</span>
<span id="341">341</span>
<span id="342">342</span>
<span id="343">343</span>
<span id="344">344</span>
<span id="345">345</span>
<span id="346">346</span>
<span id="347">347</span>
<span id="348">348</span>
<span id="349">349</span>
<span id="350">350</span>
<span id="351">351</span>
<span id="352">352</span>
<span id="353">353</span>
<span id="354">354</span>
<span id="355">355</span>
<span id="356">356</span>
<span id="357">357</span>
<span id="358">358</span>
<span id="359">359</span>
<span id="360">360</span>
<span id="361">361</span>
<span id="362">362</span>
<span id="363">363</span>
<span id="364">364</span>
<span id="365">365</span>
<span id="366">366</span>
<span id="367">367</span>
<span id="368">368</span>
<span id="369">369</span>
<span id="370">370</span>
<span id="371">371</span>
<span id="372">372</span>
<span id="373">373</span>
<span id="374">374</span>
<span id="375">375</span>
<span id="376">376</span>
<span id="377">377</span>
<span id="378">378</span>
<span id="379">379</span>
<span id="380">380</span>
<span id="381">381</span>
<span id="382">382</span>
<span id="383">383</span>
<span id="384">384</span>
<span id="385">385</span>
<span id="386">386</span>
<span id="387">387</span>
<span id="388">388</span>
<span id="389">389</span>
<span id="390">390</span>
<span id="391">391</span>
<span id="392">392</span>
<span id="393">393</span>
<span id="394">394</span>
<span id="395">395</span>
<span id="396">396</span>
<span id="397">397</span>
<span id="398">398</span>
<span id="399">399</span>
<span id="400">400</span>
<span id="401">401</span>
<span id="402">402</span>
<span id="403">403</span>
<span id="404">404</span>
<span id="405">405</span>
<span id="406">406</span>
<span id="407">407</span>
<span id="408">408</span>
<span id="409">409</span>
<span id="410">410</span>
<span id="411">411</span>
<span id="412">412</span>
<span id="413">413</span>
<span id="414">414</span>
<span id="415">415</span>
<span id="416">416</span>
<span id="417">417</span>
<span id="418">418</span>
<span id="419">419</span>
<span id="420">420</span>
<span id="421">421</span>
<span id="422">422</span>
<span id="423">423</span>
<span id="424">424</span>
<span id="425">425</span>
<span id="426">426</span>
<span id="427">427</span>
<span id="428">428</span>
<span id="429">429</span>
<span id="430">430</span>
<span id="431">431</span>
<span id="432">432</span>
<span id="433">433</span>
<span id="434">434</span>
<span id="435">435</span>
<span id="436">436</span>
<span id="437">437</span>
<span id="438">438</span>
<span id="439">439</span>
<span id="440">440</span>
<span id="441">441</span>
<span id="442">442</span>
<span id="443">443</span>
<span id="444">444</span>
<span id="445">445</span>
<span id="446">446</span>
<span id="447">447</span>
<span id="448">448</span>
<span id="449">449</span>
<span id="450">450</span>
<span id="451">451</span>
<span id="452">452</span>
<span id="453">453</span>
<span id="454">454</span>
<span id="455">455</span>
<span id="456">456</span>
<span id="457">457</span>
<span id="458">458</span>
<span id="459">459</span>
<span id="460">460</span>
<span id="461">461</span>
<span id="462">462</span>
<span id="463">463</span>
<span id="464">464</span>
<span id="465">465</span>
<span id="466">466</span>
<span id="467">467</span>
<span id="468">468</span>
<span id="469">469</span>
<span id="470">470</span>
<span id="471">471</span>
<span id="472">472</span>
<span id="473">473</span>
<span id="474">474</span>
<span id="475">475</span>
<span id="476">476</span>
<span id="477">477</span>
<span id="478">478</span>
<span id="479">479</span>
<span id="480">480</span>
<span id="481">481</span>
<span id="482">482</span>
<span id="483">483</span>
<span id="484">484</span>
<span id="485">485</span>
<span id="486">486</span>
<span id="487">487</span>
<span id="488">488</span>
<span id="489">489</span>
<span id="490">490</span>
<span id="491">491</span>
<span id="492">492</span>
<span id="493">493</span>
<span id="494">494</span>
<span id="495">495</span>
<span id="496">496</span>
<span id="497">497</span>
<span id="498">498</span>
<span id="499">499</span>
<span id="500">500</span>
<span id="501">501</span>
<span id="502">502</span>
<span id="503">503</span>
<span id="504">504</span>
<span id="505">505</span>
<span id="506">506</span>
<span id="507">507</span>
<span id="508">508</span>
<span id="509">509</span>
<span id="510">510</span>
<span id="511">511</span>
<span id="512">512</span>
<span id="513">513</span>
<span id="514">514</span>
<span id="515">515</span>
<span id="516">516</span>
<span id="517">517</span>
<span id="518">518</span>
<span id="519">519</span>
<span id="520">520</span>
<span id="521">521</span>
<span id="522">522</span>
<span id="523">523</span>
<span id="524">524</span>
<span id="525">525</span>
<span id="526">526</span>
<span id="527">527</span>
<span id="528">528</span>
<span id="529">529</span>
<span id="530">530</span>
<span id="531">531</span>
<span id="532">532</span>
<span id="533">533</span>
<span id="534">534</span>
<span id="535">535</span>
<span id="536">536</span>
<span id="537">537</span>
<span id="538">538</span>
<span id="539">539</span>
<span id="540">540</span>
<span id="541">541</span>
<span id="542">542</span>
<span id="543">543</span>
<span id="544">544</span>
<span id="545">545</span>
<span id="546">546</span>
<span id="547">547</span>
<span id="548">548</span>
<span id="549">549</span>
<span id="550">550</span>
<span id="551">551</span>
<span id="552">552</span>
<span id="553">553</span>
<span id="554">554</span>
<span id="555">555</span>
<span id="556">556</span>
<span id="557">557</span>
<span id="558">558</span>
<span id="559">559</span>
<span id="560">560</span>
<span id="561">561</span>
<span id="562">562</span>
<span id="563">563</span>
<span id="564">564</span>
<span id="565">565</span>
<span id="566">566</span>
<span id="567">567</span>
<span id="568">568</span>
<span id="569">569</span>
<span id="570">570</span>
<span id="571">571</span>
<span id="572">572</span>
<span id="573">573</span>
<span id="574">574</span>
<span id="575">575</span>
<span id="576">576</span>
<span id="577">577</span>
<span id="578">578</span>
<span id="579">579</span>
<span id="580">580</span>
<span id="581">581</span>
</pre><pre class='rust '>
<span class='comment'>// Copyright 2012 The Rust Project Developers. See the COPYRIGHT</span>
<span class='comment'>// file at the top-level directory of this distribution and at</span>
<span class='comment'>// http://rust-lang.org/COPYRIGHT.</span>
<span class='comment'>//</span>
<span class='comment'>// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class='comment'>// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class='comment'>// option. This file may not be copied, modified, or distributed</span>
<span class='comment'>// except according to those terms.</span>
<span class='doccomment'>/*!
An implementation of the SHA-1 cryptographic hash algorithm.
To use this module, first create a `Sha1` object using the `Sha1` constructor,
then feed it an input message using the `input` or `input_str` methods,
which may be called any number of times; they will buffer the input until
there is enough to call the block algorithm.
After the entire input has been fed to the hash read the result using
the `result` or `result_str` methods. The first will return bytes, and
the second will return a `String` object of the same bytes represented
in hexadecimal form.
The `Sha1` object may be reused to create multiple hashes by calling
the `reset()` method. These traits are implemented by all hash digest
algorithms that implement the `Digest` trait. An example of use is:
```rust
use self::crypto::digest::Digest;
use self::crypto::sha1::Sha1;
// create a Sha1 object
let mut hasher = Sha1::new();
// write input message
hasher.input_str("hello world");
// read hash digest
let hex = hasher.result_str();
assert_eq!(hex, "2aae6c35c94fcfb415dbe95f408b9ce91ee846ed");
```
# Mathematics
The mathematics of the SHA-1 algorithm are quite interesting. In its
definition, The SHA-1 algorithm uses:
* 1 binary operation on bit-arrays:
* "exclusive or" (XOR)
* 2 binary operations on integers:
* "addition" (ADD)
* "rotate left" (ROL)
* 3 ternary operations on bit-arrays:
* "choose" (CH)
* "parity" (PAR)
* "majority" (MAJ)
Some of these functions are commonly found in all hash digest
algorithms, but some, like "parity" is only found in SHA-1.
*/</span>
<span class='kw'>use</span> <span class='ident'>digest</span>::<span class='ident'>Digest</span>;
<span class='kw'>use</span> <span class='ident'>cryptoutil</span>::{<span class='ident'>write_u32_be</span>, <span class='ident'>read_u32v_be</span>, <span class='ident'>add_bytes_to_bits</span>, <span class='ident'>FixedBuffer</span>, <span class='ident'>FixedBuffer64</span>, <span class='ident'>StandardPadding</span>};
<span class='kw'>use</span> <span class='ident'>simd</span>::<span class='ident'>u32x4</span>;
<span class='kw'>const</span> <span class='ident'>STATE_LEN</span>: <span class='ident'>usize</span> <span class='op'>=</span> <span class='number'>5</span>;
<span class='kw'>const</span> <span class='ident'>BLOCK_LEN</span>: <span class='ident'>usize</span> <span class='op'>=</span> <span class='number'>16</span>;
<span class='kw'>const</span> <span class='ident'>K0</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='number'>0x5A827999u32</span>;
<span class='kw'>const</span> <span class='ident'>K1</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='number'>0x6ED9EBA1u32</span>;
<span class='kw'>const</span> <span class='ident'>K2</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='number'>0x8F1BBCDCu32</span>;
<span class='kw'>const</span> <span class='ident'>K3</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='number'>0xCA62C1D6u32</span>;
<span class='doccomment'>/// Not an intrinsic, but gets the first element of a vector.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_first</span>(<span class='ident'>w0</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32</span> {
<span class='ident'>w0</span>.<span class='number'>0</span>
}
<span class='doccomment'>/// Not an intrinsic, but adds a word to the first element of a vector.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_first_add</span>(<span class='ident'>e</span>: <span class='ident'>u32</span>, <span class='ident'>w0</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='ident'>a</span>, <span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>) <span class='op'>=</span> <span class='ident'>w0</span>;
<span class='ident'>u32x4</span>(<span class='ident'>e</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>a</span>), <span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>)
}
<span class='doccomment'>/// Emulates `llvm.x86.sha1msg1` intrinsic.</span>
<span class='kw'>fn</span> <span class='ident'>sha1msg1</span>(<span class='ident'>a</span>: <span class='ident'>u32x4</span>, <span class='ident'>b</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='kw'>let</span> <span class='ident'>u32x4</span>(_, _, <span class='ident'>w2</span>, <span class='ident'>w3</span>) <span class='op'>=</span> <span class='ident'>a</span>;
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='ident'>w4</span>, <span class='ident'>w5</span>, _, _) <span class='op'>=</span> <span class='ident'>b</span>;
<span class='ident'>a</span> <span class='op'>^</span> <span class='ident'>u32x4</span>(<span class='ident'>w2</span>, <span class='ident'>w3</span>, <span class='ident'>w4</span>, <span class='ident'>w5</span>)
}
<span class='doccomment'>/// Emulates `llvm.x86.sha1msg2` intrinsic.</span>
<span class='kw'>fn</span> <span class='ident'>sha1msg2</span>(<span class='ident'>a</span>: <span class='ident'>u32x4</span>, <span class='ident'>b</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='ident'>x0</span>, <span class='ident'>x1</span>, <span class='ident'>x2</span>, <span class='ident'>x3</span>) <span class='op'>=</span> <span class='ident'>a</span>;
<span class='kw'>let</span> <span class='ident'>u32x4</span>(_, <span class='ident'>w13</span>, <span class='ident'>w14</span>, <span class='ident'>w15</span>) <span class='op'>=</span> <span class='ident'>b</span>;
<span class='kw'>let</span> <span class='ident'>w16</span> <span class='op'>=</span> (<span class='ident'>x0</span> <span class='op'>^</span> <span class='ident'>w13</span>).<span class='ident'>rotate_left</span>(<span class='number'>1</span>);
<span class='kw'>let</span> <span class='ident'>w17</span> <span class='op'>=</span> (<span class='ident'>x1</span> <span class='op'>^</span> <span class='ident'>w14</span>).<span class='ident'>rotate_left</span>(<span class='number'>1</span>);
<span class='kw'>let</span> <span class='ident'>w18</span> <span class='op'>=</span> (<span class='ident'>x2</span> <span class='op'>^</span> <span class='ident'>w15</span>).<span class='ident'>rotate_left</span>(<span class='number'>1</span>);
<span class='kw'>let</span> <span class='ident'>w19</span> <span class='op'>=</span> (<span class='ident'>x3</span> <span class='op'>^</span> <span class='ident'>w16</span>).<span class='ident'>rotate_left</span>(<span class='number'>1</span>);
<span class='ident'>u32x4</span>(<span class='ident'>w16</span>, <span class='ident'>w17</span>, <span class='ident'>w18</span>, <span class='ident'>w19</span>)
}
<span class='doccomment'>/// Performs 4 rounds of the message schedule update.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_schedule_x4</span>(<span class='ident'>v0</span>: <span class='ident'>u32x4</span>, <span class='ident'>v1</span>: <span class='ident'>u32x4</span>, <span class='ident'>v2</span>: <span class='ident'>u32x4</span>, <span class='ident'>v3</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='ident'>sha1msg2</span>(<span class='ident'>sha1msg1</span>(<span class='ident'>v0</span>, <span class='ident'>v1</span>) <span class='op'>^</span> <span class='ident'>v2</span>, <span class='ident'>v3</span>)
}
<span class='doccomment'>/// Emulates `llvm.x86.sha1nexte` intrinsic.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_first_half</span>(<span class='ident'>abcd</span>: <span class='ident'>u32x4</span>, <span class='ident'>msg</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='ident'>sha1_first_add</span>(<span class='ident'>sha1_first</span>(<span class='ident'>abcd</span>).<span class='ident'>rotate_left</span>(<span class='number'>30</span>), <span class='ident'>msg</span>)
}
<span class='doccomment'>/// Emulates `llvm.x86.sha1rnds4` intrinsic.</span>
<span class='doccomment'>/// Performs 4 rounds of the message block digest.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_digest_round_x4</span>(<span class='ident'>abcd</span>: <span class='ident'>u32x4</span>, <span class='ident'>work</span>: <span class='ident'>u32x4</span>, <span class='ident'>i</span>: <span class='ident'>i8</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='kw'>const</span> <span class='ident'>K0V</span>: <span class='ident'>u32x4</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>K0</span>, <span class='ident'>K0</span>, <span class='ident'>K0</span>, <span class='ident'>K0</span>);
<span class='kw'>const</span> <span class='ident'>K1V</span>: <span class='ident'>u32x4</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>K1</span>, <span class='ident'>K1</span>, <span class='ident'>K1</span>, <span class='ident'>K1</span>);
<span class='kw'>const</span> <span class='ident'>K2V</span>: <span class='ident'>u32x4</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>K2</span>, <span class='ident'>K2</span>, <span class='ident'>K2</span>, <span class='ident'>K2</span>);
<span class='kw'>const</span> <span class='ident'>K3V</span>: <span class='ident'>u32x4</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>K3</span>, <span class='ident'>K3</span>, <span class='ident'>K3</span>, <span class='ident'>K3</span>);
<span class='kw'>match</span> <span class='ident'>i</span> {
<span class='number'>0</span> <span class='op'>=></span> <span class='ident'>sha1rnds4c</span>(<span class='ident'>abcd</span>, <span class='ident'>work</span> <span class='op'>+</span> <span class='ident'>K0V</span>),
<span class='number'>1</span> <span class='op'>=></span> <span class='ident'>sha1rnds4p</span>(<span class='ident'>abcd</span>, <span class='ident'>work</span> <span class='op'>+</span> <span class='ident'>K1V</span>),
<span class='number'>2</span> <span class='op'>=></span> <span class='ident'>sha1rnds4m</span>(<span class='ident'>abcd</span>, <span class='ident'>work</span> <span class='op'>+</span> <span class='ident'>K2V</span>),
<span class='number'>3</span> <span class='op'>=></span> <span class='ident'>sha1rnds4p</span>(<span class='ident'>abcd</span>, <span class='ident'>work</span> <span class='op'>+</span> <span class='ident'>K3V</span>),
_ <span class='op'>=></span> <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>"unknown icosaround index"</span>)
}
}
<span class='doccomment'>/// Not an intrinsic, but helps emulate `llvm.x86.sha1rnds4` intrinsic.</span>
<span class='kw'>fn</span> <span class='ident'>sha1rnds4c</span>(<span class='ident'>abcd</span>: <span class='ident'>u32x4</span>, <span class='ident'>msg</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='kw-2'>mut</span> <span class='ident'>a</span>, <span class='kw-2'>mut</span> <span class='ident'>b</span>, <span class='kw-2'>mut</span> <span class='ident'>c</span>, <span class='kw-2'>mut</span> <span class='ident'>d</span>) <span class='op'>=</span> <span class='ident'>abcd</span>;
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='ident'>t</span>, <span class='ident'>u</span>, <span class='ident'>v</span>, <span class='ident'>w</span>) <span class='op'>=</span> <span class='ident'>msg</span>;
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='number'>0u32</span>;
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>bool3ary_202</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>:<span class='ident'>expr</span>) <span class='op'>=></span> ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span> <span class='op'>^</span> (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span> <span class='op'>&</span> (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span> <span class='op'>^</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>))))
} <span class='comment'>// Choose, MD5F, SHA1C</span>
<span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>e</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>a</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_202</span><span class='macro'>!</span>(<span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>t</span>);
<span class='ident'>b</span> <span class='op'>=</span> <span class='ident'>b</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>d</span> <span class='op'>=</span> <span class='ident'>d</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>e</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_202</span><span class='macro'>!</span>(<span class='ident'>a</span>, <span class='ident'>b</span>, <span class='ident'>c</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>u</span>);
<span class='ident'>a</span> <span class='op'>=</span> <span class='ident'>a</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>c</span> <span class='op'>=</span> <span class='ident'>c</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>d</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_202</span><span class='macro'>!</span>(<span class='ident'>e</span>, <span class='ident'>a</span>, <span class='ident'>b</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>v</span>);
<span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>e</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>b</span> <span class='op'>=</span> <span class='ident'>b</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>c</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_202</span><span class='macro'>!</span>(<span class='ident'>d</span>, <span class='ident'>e</span>, <span class='ident'>a</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>w</span>);
<span class='ident'>d</span> <span class='op'>=</span> <span class='ident'>d</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>u32x4</span>(<span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>, <span class='ident'>e</span>)
}
<span class='doccomment'>/// Not an intrinsic, but helps emulate `llvm.x86.sha1rnds4` intrinsic.</span>
<span class='kw'>fn</span> <span class='ident'>sha1rnds4p</span>(<span class='ident'>abcd</span>: <span class='ident'>u32x4</span>, <span class='ident'>msg</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='kw-2'>mut</span> <span class='ident'>a</span>, <span class='kw-2'>mut</span> <span class='ident'>b</span>, <span class='kw-2'>mut</span> <span class='ident'>c</span>, <span class='kw-2'>mut</span> <span class='ident'>d</span>) <span class='op'>=</span> <span class='ident'>abcd</span>;
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='ident'>t</span>, <span class='ident'>u</span>, <span class='ident'>v</span>, <span class='ident'>w</span>) <span class='op'>=</span> <span class='ident'>msg</span>;
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='number'>0u32</span>;
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>bool3ary_150</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>:<span class='ident'>expr</span>) <span class='op'>=></span> ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span> <span class='op'>^</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span> <span class='op'>^</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>))
} <span class='comment'>// Parity, XOR, MD5H, SHA1P</span>
<span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>e</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>a</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_150</span><span class='macro'>!</span>(<span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>t</span>);
<span class='ident'>b</span> <span class='op'>=</span> <span class='ident'>b</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>d</span> <span class='op'>=</span> <span class='ident'>d</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>e</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_150</span><span class='macro'>!</span>(<span class='ident'>a</span>, <span class='ident'>b</span>, <span class='ident'>c</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>u</span>);
<span class='ident'>a</span> <span class='op'>=</span> <span class='ident'>a</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>c</span> <span class='op'>=</span> <span class='ident'>c</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>d</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_150</span><span class='macro'>!</span>(<span class='ident'>e</span>, <span class='ident'>a</span>, <span class='ident'>b</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>v</span>);
<span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>e</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>b</span> <span class='op'>=</span> <span class='ident'>b</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>c</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_150</span><span class='macro'>!</span>(<span class='ident'>d</span>, <span class='ident'>e</span>, <span class='ident'>a</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>w</span>);
<span class='ident'>d</span> <span class='op'>=</span> <span class='ident'>d</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>u32x4</span>(<span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>, <span class='ident'>e</span>)
}
<span class='doccomment'>/// Not an intrinsic, but helps emulate `llvm.x86.sha1rnds4` intrinsic.</span>
<span class='kw'>fn</span> <span class='ident'>sha1rnds4m</span>(<span class='ident'>abcd</span>: <span class='ident'>u32x4</span>, <span class='ident'>msg</span>: <span class='ident'>u32x4</span>) <span class='op'>-></span> <span class='ident'>u32x4</span> {
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='kw-2'>mut</span> <span class='ident'>a</span>, <span class='kw-2'>mut</span> <span class='ident'>b</span>, <span class='kw-2'>mut</span> <span class='ident'>c</span>, <span class='kw-2'>mut</span> <span class='ident'>d</span>) <span class='op'>=</span> <span class='ident'>abcd</span>;
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='ident'>t</span>, <span class='ident'>u</span>, <span class='ident'>v</span>, <span class='ident'>w</span>) <span class='op'>=</span> <span class='ident'>msg</span>;
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='number'>0u32</span>;
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>bool3ary_232</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>:<span class='ident'>expr</span>) <span class='op'>=></span> ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span> <span class='op'>&</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span>) <span class='op'>^</span> (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>a</span> <span class='op'>&</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>) <span class='op'>^</span> (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>b</span> <span class='op'>&</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>c</span>))
} <span class='comment'>// Majority, SHA1M</span>
<span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>e</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>a</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_232</span><span class='macro'>!</span>(<span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>t</span>);
<span class='ident'>b</span> <span class='op'>=</span> <span class='ident'>b</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>d</span> <span class='op'>=</span> <span class='ident'>d</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>e</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_232</span><span class='macro'>!</span>(<span class='ident'>a</span>, <span class='ident'>b</span>, <span class='ident'>c</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>u</span>);
<span class='ident'>a</span> <span class='op'>=</span> <span class='ident'>a</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>c</span> <span class='op'>=</span> <span class='ident'>c</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>d</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_232</span><span class='macro'>!</span>(<span class='ident'>e</span>, <span class='ident'>a</span>, <span class='ident'>b</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>v</span>);
<span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>e</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>b</span> <span class='op'>=</span> <span class='ident'>b</span>.<span class='ident'>wrapping_add</span>(<span class='ident'>c</span>.<span class='ident'>rotate_left</span>(<span class='number'>5</span>)).<span class='ident'>wrapping_add</span>(<span class='macro'>bool3ary_232</span><span class='macro'>!</span>(<span class='ident'>d</span>, <span class='ident'>e</span>, <span class='ident'>a</span>)).<span class='ident'>wrapping_add</span>(<span class='ident'>w</span>);
<span class='ident'>d</span> <span class='op'>=</span> <span class='ident'>d</span>.<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='ident'>u32x4</span>(<span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>, <span class='ident'>e</span>)
}
<span class='doccomment'>/// Process a block with the SHA-1 algorithm.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_digest_block_u32</span>(<span class='ident'>state</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u32</span>; <span class='number'>5</span>], <span class='ident'>block</span>: <span class='kw-2'>&</span>[<span class='ident'>u32</span>; <span class='number'>16</span>]) {
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>schedule</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v0</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v1</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v2</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v3</span>:<span class='ident'>expr</span>) <span class='op'>=></span> (
<span class='ident'>sha1msg2</span>(<span class='ident'>sha1msg1</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v0</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v1</span>) <span class='op'>^</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v2</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>v3</span>)
)
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>rounds4</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>h0</span>:<span class='ident'>ident</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>h1</span>:<span class='ident'>ident</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>wk</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>i</span>:<span class='ident'>expr</span>) <span class='op'>=></span> (
<span class='ident'>sha1_digest_round_x4</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>h0</span>, <span class='ident'>sha1_first_half</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>h1</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>wk</span>), <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>i</span>)
)
}
<span class='comment'>// Rounds 0..20</span>
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h0</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>state</span>[<span class='number'>0</span>],
<span class='ident'>state</span>[<span class='number'>1</span>],
<span class='ident'>state</span>[<span class='number'>2</span>],
<span class='ident'>state</span>[<span class='number'>3</span>]);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>w0</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>block</span>[<span class='number'>0</span>],
<span class='ident'>block</span>[<span class='number'>1</span>],
<span class='ident'>block</span>[<span class='number'>2</span>],
<span class='ident'>block</span>[<span class='number'>3</span>]);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h1</span> <span class='op'>=</span> <span class='ident'>sha1_digest_round_x4</span>(<span class='ident'>h0</span>, <span class='ident'>sha1_first_add</span>(<span class='ident'>state</span>[<span class='number'>4</span>], <span class='ident'>w0</span>), <span class='number'>0</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>w1</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>block</span>[<span class='number'>4</span>],
<span class='ident'>block</span>[<span class='number'>5</span>],
<span class='ident'>block</span>[<span class='number'>6</span>],
<span class='ident'>block</span>[<span class='number'>7</span>]);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w1</span>, <span class='number'>0</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>w2</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>block</span>[<span class='number'>8</span>],
<span class='ident'>block</span>[<span class='number'>9</span>],
<span class='ident'>block</span>[<span class='number'>10</span>],
<span class='ident'>block</span>[<span class='number'>11</span>]);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w2</span>, <span class='number'>0</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>w3</span> <span class='op'>=</span> <span class='ident'>u32x4</span>(<span class='ident'>block</span>[<span class='number'>12</span>],
<span class='ident'>block</span>[<span class='number'>13</span>],
<span class='ident'>block</span>[<span class='number'>14</span>],
<span class='ident'>block</span>[<span class='number'>15</span>]);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w3</span>, <span class='number'>0</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>w4</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w0</span>, <span class='ident'>w1</span>, <span class='ident'>w2</span>, <span class='ident'>w3</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w4</span>, <span class='number'>0</span>);
<span class='comment'>// Rounds 20..40</span>
<span class='ident'>w0</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w1</span>, <span class='ident'>w2</span>, <span class='ident'>w3</span>, <span class='ident'>w4</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w0</span>, <span class='number'>1</span>);
<span class='ident'>w1</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w2</span>, <span class='ident'>w3</span>, <span class='ident'>w4</span>, <span class='ident'>w0</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w1</span>, <span class='number'>1</span>);
<span class='ident'>w2</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w3</span>, <span class='ident'>w4</span>, <span class='ident'>w0</span>, <span class='ident'>w1</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w2</span>, <span class='number'>1</span>);
<span class='ident'>w3</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w4</span>, <span class='ident'>w0</span>, <span class='ident'>w1</span>, <span class='ident'>w2</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w3</span>, <span class='number'>1</span>);
<span class='ident'>w4</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w0</span>, <span class='ident'>w1</span>, <span class='ident'>w2</span>, <span class='ident'>w3</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w4</span>, <span class='number'>1</span>);
<span class='comment'>// Rounds 40..60</span>
<span class='ident'>w0</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w1</span>, <span class='ident'>w2</span>, <span class='ident'>w3</span>, <span class='ident'>w4</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w0</span>, <span class='number'>2</span>);
<span class='ident'>w1</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w2</span>, <span class='ident'>w3</span>, <span class='ident'>w4</span>, <span class='ident'>w0</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w1</span>, <span class='number'>2</span>);
<span class='ident'>w2</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w3</span>, <span class='ident'>w4</span>, <span class='ident'>w0</span>, <span class='ident'>w1</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w2</span>, <span class='number'>2</span>);
<span class='ident'>w3</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w4</span>, <span class='ident'>w0</span>, <span class='ident'>w1</span>, <span class='ident'>w2</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w3</span>, <span class='number'>2</span>);
<span class='ident'>w4</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w0</span>, <span class='ident'>w1</span>, <span class='ident'>w2</span>, <span class='ident'>w3</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w4</span>, <span class='number'>2</span>);
<span class='comment'>// Rounds 60..80</span>
<span class='ident'>w0</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w1</span>, <span class='ident'>w2</span>, <span class='ident'>w3</span>, <span class='ident'>w4</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w0</span>, <span class='number'>3</span>);
<span class='ident'>w1</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w2</span>, <span class='ident'>w3</span>, <span class='ident'>w4</span>, <span class='ident'>w0</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w1</span>, <span class='number'>3</span>);
<span class='ident'>w2</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w3</span>, <span class='ident'>w4</span>, <span class='ident'>w0</span>, <span class='ident'>w1</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w2</span>, <span class='number'>3</span>);
<span class='ident'>w3</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w4</span>, <span class='ident'>w0</span>, <span class='ident'>w1</span>, <span class='ident'>w2</span>);
<span class='ident'>h1</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h0</span>, <span class='ident'>h1</span>, <span class='ident'>w3</span>, <span class='number'>3</span>);
<span class='ident'>w4</span> <span class='op'>=</span> <span class='macro'>schedule</span><span class='macro'>!</span>(<span class='ident'>w0</span>, <span class='ident'>w1</span>, <span class='ident'>w2</span>, <span class='ident'>w3</span>);
<span class='ident'>h0</span> <span class='op'>=</span> <span class='macro'>rounds4</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h0</span>, <span class='ident'>w4</span>, <span class='number'>3</span>);
<span class='kw'>let</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='ident'>sha1_first</span>(<span class='ident'>h1</span>).<span class='ident'>rotate_left</span>(<span class='number'>30</span>);
<span class='kw'>let</span> <span class='ident'>u32x4</span>(<span class='ident'>a</span>, <span class='ident'>b</span>, <span class='ident'>c</span>, <span class='ident'>d</span>) <span class='op'>=</span> <span class='ident'>h0</span>;
<span class='ident'>state</span>[<span class='number'>0</span>] <span class='op'>=</span> <span class='ident'>state</span>[<span class='number'>0</span>].<span class='ident'>wrapping_add</span>(<span class='ident'>a</span>);
<span class='ident'>state</span>[<span class='number'>1</span>] <span class='op'>=</span> <span class='ident'>state</span>[<span class='number'>1</span>].<span class='ident'>wrapping_add</span>(<span class='ident'>b</span>);
<span class='ident'>state</span>[<span class='number'>2</span>] <span class='op'>=</span> <span class='ident'>state</span>[<span class='number'>2</span>].<span class='ident'>wrapping_add</span>(<span class='ident'>c</span>);
<span class='ident'>state</span>[<span class='number'>3</span>] <span class='op'>=</span> <span class='ident'>state</span>[<span class='number'>3</span>].<span class='ident'>wrapping_add</span>(<span class='ident'>d</span>);
<span class='ident'>state</span>[<span class='number'>4</span>] <span class='op'>=</span> <span class='ident'>state</span>[<span class='number'>4</span>].<span class='ident'>wrapping_add</span>(<span class='ident'>e</span>);
}
<span class='doccomment'>/// Process a block with the SHA-1 algorithm. (See more...)</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// SHA-1 is a cryptographic hash function, and as such, it operates</span>
<span class='doccomment'>/// on an arbitrary number of bytes. This function operates on a fixed</span>
<span class='doccomment'>/// number of bytes. If you call this function with anything other than</span>
<span class='doccomment'>/// 64 bytes, then it will panic! This function takes two arguments:</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// * `state` is reference to an **array** of 5 words.</span>
<span class='doccomment'>/// * `block` is reference to a **slice** of 64 bytes.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// If you want the function that performs a message digest on an arbitrary</span>
<span class='doccomment'>/// number of bytes, then see also the `Sha1` struct above.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Implementation</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// First, some background. Both ARM and Intel are releasing documentation</span>
<span class='doccomment'>/// that they plan to include instruction set extensions for SHA1 and SHA256</span>
<span class='doccomment'>/// sometime in the near future. Second, LLVM won't lower these intrinsics yet,</span>
<span class='doccomment'>/// so these functions were written emulate these instructions. Finally,</span>
<span class='doccomment'>/// the block function implemented with these emulated intrinsics turned out</span>
<span class='doccomment'>/// to be quite fast! What follows is a discussion of this CPU-level view</span>
<span class='doccomment'>/// of the SHA-1 algorithm and how it relates to the mathematical definition.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The SHA instruction set extensions can be divided up into two categories:</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// * message work schedule update calculation ("schedule" v., "work" n.)</span>
<span class='doccomment'>/// * message block 80-round digest calculation ("digest" v., "block" n.)</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The schedule-related functions can be used to easily perform 4 rounds</span>
<span class='doccomment'>/// of the message work schedule update calculation, as shown below:</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```ignore</span>
<span class='doccomment'>/// macro_rules! schedule_x4 {</span>
<span class='doccomment'>/// ($v0:expr, $v1:expr, $v2:expr, $v3:expr) => (</span>
<span class='doccomment'>/// sha1msg2(sha1msg1($v0, $v1) ^ $v2, $v3)</span>
<span class='doccomment'>/// )</span>
<span class='doccomment'>/// }</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// macro_rules! round_x4 {</span>
<span class='doccomment'>/// ($h0:ident, $h1:ident, $wk:expr, $i:expr) => (</span>
<span class='doccomment'>/// sha1rnds4($h0, sha1_first_half($h1, $wk), $i)</span>
<span class='doccomment'>/// )</span>
<span class='doccomment'>/// }</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// and also shown above is how the digest-related functions can be used to</span>
<span class='doccomment'>/// perform 4 rounds of the message block digest calculation.</span>
<span class='doccomment'>///</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_digest_block</span>(<span class='ident'>state</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u32</span>; <span class='number'>5</span>], <span class='ident'>block</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span><span class='comment'>/*; 64*/</span>]) {
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>block</span>.<span class='ident'>len</span>(), <span class='ident'>BLOCK_LEN</span><span class='kw-2'>*</span><span class='number'>4</span>);
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>block2</span> <span class='op'>=</span> [<span class='number'>0u32</span>; <span class='ident'>BLOCK_LEN</span>];
<span class='ident'>read_u32v_be</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>block2</span>[..], <span class='ident'>block</span>);
<span class='ident'>sha1_digest_block_u32</span>(<span class='ident'>state</span>, <span class='kw-2'>&</span><span class='ident'>block2</span>);
}
<span class='kw'>fn</span> <span class='ident'>add_input</span>(<span class='ident'>st</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>Sha1</span>, <span class='ident'>msg</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) {
<span class='macro'>assert</span><span class='macro'>!</span>((<span class='op'>!</span><span class='ident'>st</span>.<span class='ident'>computed</span>));
<span class='comment'>// Assumes that msg.len() can be converted to u64 without overflow</span>
<span class='ident'>st</span>.<span class='ident'>length_bits</span> <span class='op'>=</span> <span class='ident'>add_bytes_to_bits</span>(<span class='ident'>st</span>.<span class='ident'>length_bits</span>, <span class='ident'>msg</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u64</span>);
<span class='kw'>let</span> <span class='ident'>st_h</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>st</span>.<span class='ident'>h</span>;
<span class='ident'>st</span>.<span class='ident'>buffer</span>.<span class='ident'>input</span>(<span class='ident'>msg</span>, <span class='op'>|</span><span class='ident'>d</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]<span class='op'>|</span> { <span class='ident'>sha1_digest_block</span>(<span class='ident'>st_h</span>, <span class='ident'>d</span>); });
}
<span class='kw'>fn</span> <span class='ident'>mk_result</span>(<span class='ident'>st</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>Sha1</span>, <span class='ident'>rs</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>]) {
<span class='kw'>if</span> <span class='op'>!</span><span class='ident'>st</span>.<span class='ident'>computed</span> {
<span class='kw'>let</span> <span class='ident'>st_h</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>st</span>.<span class='ident'>h</span>;
<span class='ident'>st</span>.<span class='ident'>buffer</span>.<span class='ident'>standard_padding</span>(<span class='number'>8</span>, <span class='op'>|</span><span class='ident'>d</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]<span class='op'>|</span> { <span class='ident'>sha1_digest_block</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='kw-2'>*</span><span class='ident'>st_h</span>, <span class='ident'>d</span>) });
<span class='ident'>write_u32_be</span>(<span class='ident'>st</span>.<span class='ident'>buffer</span>.<span class='ident'>next</span>(<span class='number'>4</span>), (<span class='ident'>st</span>.<span class='ident'>length_bits</span> <span class='op'>>></span> <span class='number'>32</span>) <span class='kw'>as</span> <span class='ident'>u32</span> );
<span class='ident'>write_u32_be</span>(<span class='ident'>st</span>.<span class='ident'>buffer</span>.<span class='ident'>next</span>(<span class='number'>4</span>), <span class='ident'>st</span>.<span class='ident'>length_bits</span> <span class='kw'>as</span> <span class='ident'>u32</span>);
<span class='ident'>sha1_digest_block</span>(<span class='ident'>st_h</span>, <span class='ident'>st</span>.<span class='ident'>buffer</span>.<span class='ident'>full_buffer</span>());
<span class='ident'>st</span>.<span class='ident'>computed</span> <span class='op'>=</span> <span class='bool-val'>true</span>;
}
<span class='ident'>write_u32_be</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>rs</span>[<span class='number'>0</span>..<span class='number'>4</span>], <span class='ident'>st</span>.<span class='ident'>h</span>[<span class='number'>0</span>]);
<span class='ident'>write_u32_be</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>rs</span>[<span class='number'>4</span>..<span class='number'>8</span>], <span class='ident'>st</span>.<span class='ident'>h</span>[<span class='number'>1</span>]);
<span class='ident'>write_u32_be</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>rs</span>[<span class='number'>8</span>..<span class='number'>12</span>], <span class='ident'>st</span>.<span class='ident'>h</span>[<span class='number'>2</span>]);
<span class='ident'>write_u32_be</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>rs</span>[<span class='number'>12</span>..<span class='number'>16</span>], <span class='ident'>st</span>.<span class='ident'>h</span>[<span class='number'>3</span>]);
<span class='ident'>write_u32_be</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>rs</span>[<span class='number'>16</span>..<span class='number'>20</span>], <span class='ident'>st</span>.<span class='ident'>h</span>[<span class='number'>4</span>]);
}
<span class='doccomment'>/// Structure representing the state of a Sha1 computation</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Sha1</span> {
<span class='ident'>h</span>: [<span class='ident'>u32</span>; <span class='ident'>STATE_LEN</span>],
<span class='ident'>length_bits</span>: <span class='ident'>u64</span>,
<span class='ident'>buffer</span>: <span class='ident'>FixedBuffer64</span>,
<span class='ident'>computed</span>: <span class='ident'>bool</span>,
}
<span class='kw'>impl</span> <span class='ident'>Sha1</span> {
<span class='doccomment'>/// Construct a `sha` object</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>() <span class='op'>-></span> <span class='ident'>Sha1</span> {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>st</span> <span class='op'>=</span> <span class='ident'>Sha1</span> {
<span class='ident'>h</span>: [<span class='number'>0u32</span>; <span class='ident'>STATE_LEN</span>],
<span class='ident'>length_bits</span>: <span class='number'>0u64</span>,
<span class='ident'>buffer</span>: <span class='ident'>FixedBuffer64</span>::<span class='ident'>new</span>(),
<span class='ident'>computed</span>: <span class='bool-val'>false</span>,
};
<span class='ident'>st</span>.<span class='ident'>reset</span>();
<span class='ident'>st</span>
}
}
<span class='kw'>impl</span> <span class='ident'>Digest</span> <span class='kw'>for</span> <span class='ident'>Sha1</span> {
<span class='kw'>fn</span> <span class='ident'>reset</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) {
<span class='self'>self</span>.<span class='ident'>length_bits</span> <span class='op'>=</span> <span class='number'>0</span>;
<span class='self'>self</span>.<span class='ident'>h</span>[<span class='number'>0</span>] <span class='op'>=</span> <span class='number'>0x67452301u32</span>;
<span class='self'>self</span>.<span class='ident'>h</span>[<span class='number'>1</span>] <span class='op'>=</span> <span class='number'>0xEFCDAB89u32</span>;
<span class='self'>self</span>.<span class='ident'>h</span>[<span class='number'>2</span>] <span class='op'>=</span> <span class='number'>0x98BADCFEu32</span>;
<span class='self'>self</span>.<span class='ident'>h</span>[<span class='number'>3</span>] <span class='op'>=</span> <span class='number'>0x10325476u32</span>;
<span class='self'>self</span>.<span class='ident'>h</span>[<span class='number'>4</span>] <span class='op'>=</span> <span class='number'>0xC3D2E1F0u32</span>;
<span class='self'>self</span>.<span class='ident'>buffer</span>.<span class='ident'>reset</span>();
<span class='self'>self</span>.<span class='ident'>computed</span> <span class='op'>=</span> <span class='bool-val'>false</span>;
}
<span class='kw'>fn</span> <span class='ident'>input</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>msg</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) { <span class='ident'>add_input</span>(<span class='self'>self</span>, <span class='ident'>msg</span>); }
<span class='kw'>fn</span> <span class='ident'>result</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>out</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>]) { <span class='ident'>mk_result</span>(<span class='self'>self</span>, <span class='ident'>out</span>) }
<span class='kw'>fn</span> <span class='ident'>output_bits</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>usize</span> { <span class='number'>160</span> }
<span class='kw'>fn</span> <span class='ident'>block_size</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>usize</span> { <span class='number'>64</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='ident'>cryptoutil</span>::<span class='ident'>test</span>::<span class='ident'>test_digest_1million_random</span>;
<span class='kw'>use</span> <span class='ident'>digest</span>::<span class='ident'>Digest</span>;
<span class='kw'>use</span> <span class='ident'>sha1</span>::<span class='ident'>Sha1</span>;
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span>
<span class='kw'>struct</span> <span class='ident'>Test</span> {
<span class='ident'>input</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>,
<span class='ident'>output</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>output_str</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>,
}
<span class='attribute'>#[<span class='ident'>test</span>]</span>
<span class='kw'>fn</span> <span class='ident'>test</span>() {
<span class='kw'>let</span> <span class='ident'>tests</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='comment'>// Test messages from FIPS 180-1</span>
<span class='ident'>Test</span> {
<span class='ident'>input</span>: <span class='string'>"abc"</span>,
<span class='ident'>output</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0xA9u8</span>, <span class='number'>0x99u8</span>, <span class='number'>0x3Eu8</span>, <span class='number'>0x36u8</span>,
<span class='number'>0x47u8</span>, <span class='number'>0x06u8</span>, <span class='number'>0x81u8</span>, <span class='number'>0x6Au8</span>,
<span class='number'>0xBAu8</span>, <span class='number'>0x3Eu8</span>, <span class='number'>0x25u8</span>, <span class='number'>0x71u8</span>,
<span class='number'>0x78u8</span>, <span class='number'>0x50u8</span>, <span class='number'>0xC2u8</span>, <span class='number'>0x6Cu8</span>,
<span class='number'>0x9Cu8</span>, <span class='number'>0xD0u8</span>, <span class='number'>0xD8u8</span>, <span class='number'>0x9Du8</span>,
],
<span class='ident'>output_str</span>: <span class='string'>"a9993e364706816aba3e25717850c26c9cd0d89d"</span>
},
<span class='ident'>Test</span> {
<span class='ident'>input</span>:
<span class='string'>"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"</span>,
<span class='ident'>output</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x84u8</span>, <span class='number'>0x98u8</span>, <span class='number'>0x3Eu8</span>, <span class='number'>0x44u8</span>,
<span class='number'>0x1Cu8</span>, <span class='number'>0x3Bu8</span>, <span class='number'>0xD2u8</span>, <span class='number'>0x6Eu8</span>,
<span class='number'>0xBAu8</span>, <span class='number'>0xAEu8</span>, <span class='number'>0x4Au8</span>, <span class='number'>0xA1u8</span>,
<span class='number'>0xF9u8</span>, <span class='number'>0x51u8</span>, <span class='number'>0x29u8</span>, <span class='number'>0xE5u8</span>,
<span class='number'>0xE5u8</span>, <span class='number'>0x46u8</span>, <span class='number'>0x70u8</span>, <span class='number'>0xF1u8</span>,
],
<span class='ident'>output_str</span>: <span class='string'>"84983e441c3bd26ebaae4aa1f95129e5e54670f1"</span>
},
<span class='comment'>// Examples from wikipedia</span>
<span class='ident'>Test</span> {
<span class='ident'>input</span>: <span class='string'>"The quick brown fox jumps over the lazy dog"</span>,
<span class='ident'>output</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0x2fu8</span>, <span class='number'>0xd4u8</span>, <span class='number'>0xe1u8</span>, <span class='number'>0xc6u8</span>,
<span class='number'>0x7au8</span>, <span class='number'>0x2du8</span>, <span class='number'>0x28u8</span>, <span class='number'>0xfcu8</span>,
<span class='number'>0xedu8</span>, <span class='number'>0x84u8</span>, <span class='number'>0x9eu8</span>, <span class='number'>0xe1u8</span>,
<span class='number'>0xbbu8</span>, <span class='number'>0x76u8</span>, <span class='number'>0xe7u8</span>, <span class='number'>0x39u8</span>,
<span class='number'>0x1bu8</span>, <span class='number'>0x93u8</span>, <span class='number'>0xebu8</span>, <span class='number'>0x12u8</span>,
],
<span class='ident'>output_str</span>: <span class='string'>"2fd4e1c67a2d28fced849ee1bb76e7391b93eb12"</span>,
},
<span class='ident'>Test</span> {
<span class='ident'>input</span>: <span class='string'>"The quick brown fox jumps over the lazy cog"</span>,
<span class='ident'>output</span>: <span class='macro'>vec</span><span class='macro'>!</span>[
<span class='number'>0xdeu8</span>, <span class='number'>0x9fu8</span>, <span class='number'>0x2cu8</span>, <span class='number'>0x7fu8</span>,
<span class='number'>0xd2u8</span>, <span class='number'>0x5eu8</span>, <span class='number'>0x1bu8</span>, <span class='number'>0x3au8</span>,
<span class='number'>0xfau8</span>, <span class='number'>0xd3u8</span>, <span class='number'>0xe8u8</span>, <span class='number'>0x5au8</span>,
<span class='number'>0x0bu8</span>, <span class='number'>0xd1u8</span>, <span class='number'>0x7du8</span>, <span class='number'>0x9bu8</span>,
<span class='number'>0x10u8</span>, <span class='number'>0x0du8</span>, <span class='number'>0xb4u8</span>, <span class='number'>0xb3u8</span>,
],
<span class='ident'>output_str</span>: <span class='string'>"de9f2c7fd25e1b3afad3e85a0bd17d9b100db4b3"</span>,
},
];
<span class='comment'>// Test that it works when accepting the message all at once</span>
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>out</span> <span class='op'>=</span> [<span class='number'>0u8</span>; <span class='number'>20</span>];
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>sh</span> <span class='op'>=</span> <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>Sha1</span>::<span class='ident'>new</span>());
<span class='kw'>for</span> <span class='ident'>t</span> <span class='kw'>in</span> <span class='ident'>tests</span>.<span class='ident'>iter</span>() {
(<span class='kw-2'>*</span><span class='ident'>sh</span>).<span class='ident'>input_str</span>(<span class='ident'>t</span>.<span class='ident'>input</span>);
<span class='ident'>sh</span>.<span class='ident'>result</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>out</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>t</span>.<span class='ident'>output</span>[..] <span class='op'>==</span> <span class='ident'>out</span>[..]);
<span class='kw'>let</span> <span class='ident'>out_str</span> <span class='op'>=</span> (<span class='kw-2'>*</span><span class='ident'>sh</span>).<span class='ident'>result_str</span>();
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>out_str</span>.<span class='ident'>len</span>(), <span class='number'>40</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='kw-2'>&</span><span class='ident'>out_str</span>[..] <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>output_str</span>);
<span class='ident'>sh</span>.<span class='ident'>reset</span>();
}
<span class='comment'>// Test that it works when accepting the message in pieces</span>
<span class='kw'>for</span> <span class='ident'>t</span> <span class='kw'>in</span> <span class='ident'>tests</span>.<span class='ident'>iter</span>() {
<span class='kw'>let</span> <span class='ident'>len</span> <span class='op'>=</span> <span class='ident'>t</span>.<span class='ident'>input</span>.<span class='ident'>len</span>();
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>left</span> <span class='op'>=</span> <span class='ident'>len</span>;
<span class='kw'>while</span> <span class='ident'>left</span> <span class='op'>></span> <span class='number'>0</span> {
<span class='kw'>let</span> <span class='ident'>take</span> <span class='op'>=</span> (<span class='ident'>left</span> <span class='op'>+</span> <span class='number'>1</span>) <span class='op'>/</span> <span class='number'>2</span>;
(<span class='kw-2'>*</span><span class='ident'>sh</span>).<span class='ident'>input_str</span>(<span class='kw-2'>&</span><span class='ident'>t</span>.<span class='ident'>input</span>[<span class='ident'>len</span> <span class='op'>-</span> <span class='ident'>left</span>..<span class='ident'>take</span> <span class='op'>+</span> <span class='ident'>len</span> <span class='op'>-</span> <span class='ident'>left</span>]);
<span class='ident'>left</span> <span class='op'>=</span> <span class='ident'>left</span> <span class='op'>-</span> <span class='ident'>take</span>;
}
<span class='ident'>sh</span>.<span class='ident'>result</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>out</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>t</span>.<span class='ident'>output</span>[..] <span class='op'>==</span> <span class='ident'>out</span>[..]);
<span class='kw'>let</span> <span class='ident'>out_str</span> <span class='op'>=</span> (<span class='kw-2'>*</span><span class='ident'>sh</span>).<span class='ident'>result_str</span>();
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>out_str</span>.<span class='ident'>len</span>(), <span class='number'>40</span>);
<span class='macro'>assert</span><span class='macro'>!</span>(<span class='kw-2'>&</span><span class='ident'>out_str</span>[..] <span class='op'>==</span> <span class='ident'>t</span>.<span class='ident'>output_str</span>);
<span class='ident'>sh</span>.<span class='ident'>reset</span>();
}
}
<span class='attribute'>#[<span class='ident'>test</span>]</span>
<span class='kw'>fn</span> <span class='ident'>test_1million_random_sha1</span>() {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>sh</span> <span class='op'>=</span> <span class='ident'>Sha1</span>::<span class='ident'>new</span>();
<span class='ident'>test_digest_1million_random</span>(
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>sh</span>,
<span class='number'>64</span>,
<span class='string'>"34aa973cd4c4daa4f61eeb2bdbad27316534016f"</span>);
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>all</span>(<span class='ident'>test</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"with-bench"</span>))]</span>
<span class='kw'>mod</span> <span class='ident'>bench</span> {
<span class='kw'>use</span> <span class='ident'>test</span>::<span class='ident'>Bencher</span>;
<span class='kw'>use</span> <span class='ident'>digest</span>::<span class='ident'>Digest</span>;
<span class='kw'>use</span> <span class='ident'>sha1</span>::{<span class='ident'>STATE_LEN</span>, <span class='ident'>BLOCK_LEN</span>};
<span class='kw'>use</span> <span class='ident'>sha1</span>::{<span class='ident'>Sha1</span>, <span class='ident'>sha1_digest_block_u32</span>};
<span class='attribute'>#[<span class='ident'>bench</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_block</span>(<span class='ident'>bh</span>: <span class='op'>&</span> <span class='kw-2'>mut</span> <span class='ident'>Bencher</span>) {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>state</span> <span class='op'>=</span> [<span class='number'>0u32</span>; <span class='ident'>STATE_LEN</span>];
<span class='kw'>let</span> <span class='ident'>words</span> <span class='op'>=</span> [<span class='number'>1u32</span>; <span class='ident'>BLOCK_LEN</span>];
<span class='ident'>bh</span>.<span class='ident'>iter</span>( <span class='op'>||</span> {
<span class='ident'>sha1_digest_block_u32</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>state</span>, <span class='kw-2'>&</span><span class='ident'>words</span>);
});
<span class='ident'>bh</span>.<span class='ident'>bytes</span> <span class='op'>=</span> <span class='number'>64u64</span>;
}
<span class='attribute'>#[<span class='ident'>bench</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_10</span>(<span class='ident'>bh</span>: <span class='op'>&</span> <span class='kw-2'>mut</span> <span class='ident'>Bencher</span>) {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>sh</span> <span class='op'>=</span> <span class='ident'>Sha1</span>::<span class='ident'>new</span>();
<span class='kw'>let</span> <span class='ident'>bytes</span> <span class='op'>=</span> [<span class='number'>1u8</span>; <span class='number'>10</span>];
<span class='ident'>bh</span>.<span class='ident'>iter</span>( <span class='op'>||</span> {
<span class='ident'>sh</span>.<span class='ident'>input</span>(<span class='kw-2'>&</span><span class='ident'>bytes</span>);
});
<span class='ident'>bh</span>.<span class='ident'>bytes</span> <span class='op'>=</span> <span class='ident'>bytes</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u64</span>;
}
<span class='attribute'>#[<span class='ident'>bench</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_1k</span>(<span class='ident'>bh</span>: <span class='op'>&</span> <span class='kw-2'>mut</span> <span class='ident'>Bencher</span>) {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>sh</span> <span class='op'>=</span> <span class='ident'>Sha1</span>::<span class='ident'>new</span>();
<span class='kw'>let</span> <span class='ident'>bytes</span> <span class='op'>=</span> [<span class='number'>1u8</span>; <span class='number'>1024</span>];
<span class='ident'>bh</span>.<span class='ident'>iter</span>( <span class='op'>||</span> {
<span class='ident'>sh</span>.<span class='ident'>input</span>(<span class='kw-2'>&</span><span class='ident'>bytes</span>);
});
<span class='ident'>bh</span>.<span class='ident'>bytes</span> <span class='op'>=</span> <span class='ident'>bytes</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u64</span>;
}
<span class='attribute'>#[<span class='ident'>bench</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>sha1_64k</span>(<span class='ident'>bh</span>: <span class='op'>&</span> <span class='kw-2'>mut</span> <span class='ident'>Bencher</span>) {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>sh</span> <span class='op'>=</span> <span class='ident'>Sha1</span>::<span class='ident'>new</span>();
<span class='kw'>let</span> <span class='ident'>bytes</span> <span class='op'>=</span> [<span class='number'>1u8</span>; <span class='number'>65536</span>];
<span class='ident'>bh</span>.<span class='ident'>iter</span>( <span class='op'>||</span> {
<span class='ident'>sh</span>.<span class='ident'>input</span>(<span class='kw-2'>&</span><span class='ident'>bytes</span>);
});
<span class='ident'>bh</span>.<span class='ident'>bytes</span> <span class='op'>=</span> <span class='ident'>bytes</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u64</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 = "../../";
window.currentCrate = "crypto";
</script>
<script src="../../jquery.js"></script>
<script src="../../main.js"></script>
<script defer src="../../search-index.js"></script>
</body>
</html>