| <!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 of the Rust file `/root/.cargo/git/checkouts/incubator-teaclave-crates-c8106113f74feefc/ede1f68/ring/src/digest/sha1.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>sha1.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../ring/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../ring/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// Copyright 2015-2016 Brian Smith. |
| // Copyright 2016 Simon Sapin. |
| // |
| // Permission to use, copy, modify, and/or distribute this software for any |
| // purpose with or without fee is hereby granted, provided that the above |
| // copyright notice and this permission notice appear in all copies. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES |
| // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY |
| // SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| |
| </span><span class="kw">use </span><span class="kw">super</span>::sha2::{ch, maj, Word}; |
| <span class="kw">use </span><span class="kw">crate</span>::c; |
| <span class="kw">use </span>core::{convert::TryInto, num::Wrapping}; |
| |
| <span class="kw">pub const </span>BLOCK_LEN: usize = <span class="number">512 </span>/ <span class="number">8</span>; |
| <span class="kw">pub const </span>CHAINING_LEN: usize = <span class="number">160 </span>/ <span class="number">8</span>; |
| <span class="kw">pub const </span>OUTPUT_LEN: usize = <span class="number">160 </span>/ <span class="number">8</span>; |
| <span class="kw">const </span>CHAINING_WORDS: usize = CHAINING_LEN / <span class="number">4</span>; |
| |
| <span class="kw">type </span>W32 = Wrapping<u32>; |
| |
| <span class="comment">// FIPS 180-4 4.1.1 |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>parity(x: W32, y: W32, z: W32) -> W32 { |
| x ^ y ^ z |
| } |
| |
| <span class="kw">type </span>State = [W32; CHAINING_WORDS]; |
| <span class="kw">const </span>ROUNDS: usize = <span class="number">80</span>; |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">extern </span><span class="string">"C" </span><span class="kw">fn </span>block_data_order( |
| state: <span class="kw-2">&mut </span><span class="kw">super</span>::State, |
| data: <span class="kw-2">*const </span>u8, |
| num: c::size_t, |
| ) { |
| <span class="kw">let </span>state = <span class="kw">unsafe </span>{ <span class="kw-2">&mut </span>state.as32 }; |
| <span class="kw">let </span>state: <span class="kw-2">&mut </span>State = (<span class="kw-2">&mut </span>state[..CHAINING_WORDS]).try_into().unwrap(); |
| <span class="kw">let </span>data = data <span class="kw">as </span><span class="kw-2">*const </span>[<W32 <span class="kw">as </span>Word>::InputBytes; <span class="number">16</span>]; |
| <span class="kw">let </span>blocks = <span class="kw">unsafe </span>{ core::slice::from_raw_parts(data, num) }; |
| <span class="kw-2">*</span>state = block_data_order_(<span class="kw-2">*</span>state, blocks) |
| } |
| |
| <span class="attribute">#[inline] |
| #[rustfmt::skip] |
| </span><span class="kw">fn </span>block_data_order_(<span class="kw-2">mut </span>H: State, M: <span class="kw-2">&</span>[[<W32 <span class="kw">as </span>Word>::InputBytes; <span class="number">16</span>]]) -> State { |
| <span class="kw">for </span>M <span class="kw">in </span>M { |
| <span class="comment">// FIPS 180-4 6.1.2 Step 1 |
| </span><span class="kw">let </span><span class="kw-2">mut </span>W: [W32; ROUNDS] = [W32::ZERO; ROUNDS]; |
| <span class="kw">for </span>t <span class="kw">in </span><span class="number">0</span>..<span class="number">16 </span>{ |
| W[t] = W32::from_be_bytes(M[t]); |
| } |
| <span class="kw">for </span>t <span class="kw">in </span><span class="number">16</span>..ROUNDS { |
| <span class="kw">let </span>wt = W[t - <span class="number">3</span>] ^ W[t - <span class="number">8</span>] ^ W[t - <span class="number">14</span>] ^ W[t - <span class="number">16</span>]; |
| W[t] = rotl(wt, <span class="number">1</span>); |
| } |
| |
| <span class="comment">// FIPS 180-4 6.1.2 Step 2 |
| </span><span class="kw">let </span>a = H[<span class="number">0</span>]; |
| <span class="kw">let </span>b = H[<span class="number">1</span>]; |
| <span class="kw">let </span>c = H[<span class="number">2</span>]; |
| <span class="kw">let </span>d = H[<span class="number">3</span>]; |
| <span class="kw">let </span>e = H[<span class="number">4</span>]; |
| |
| <span class="comment">// FIPS 180-4 6.1.2 Step 3 with constants and functions from FIPS 180-4 {4.1.1, 4.2.1} |
| </span><span class="kw">let </span>(a, b, c, d, e) = step3(a, b, c, d, e, W[ <span class="number">0</span>..<span class="number">20</span>].try_into().unwrap(), Wrapping(<span class="number">0x5a827999</span>), ch); |
| <span class="kw">let </span>(a, b, c, d, e) = step3(a, b, c, d, e, W[<span class="number">20</span>..<span class="number">40</span>].try_into().unwrap(), Wrapping(<span class="number">0x6ed9eba1</span>), parity); |
| <span class="kw">let </span>(a, b, c, d, e) = step3(a, b, c, d, e, W[<span class="number">40</span>..<span class="number">60</span>].try_into().unwrap(), Wrapping(<span class="number">0x8f1bbcdc</span>), maj); |
| <span class="kw">let </span>(a, b, c, d, e) = step3(a, b, c, d, e, W[<span class="number">60</span>..<span class="number">80</span>].try_into().unwrap(), Wrapping(<span class="number">0xca62c1d6</span>), parity); |
| |
| <span class="comment">// FIPS 180-4 6.1.2 Step 4 |
| </span>H[<span class="number">0</span>] += a; |
| H[<span class="number">1</span>] += b; |
| H[<span class="number">2</span>] += c; |
| H[<span class="number">3</span>] += d; |
| H[<span class="number">4</span>] += e; |
| } |
| |
| H |
| } |
| |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">fn </span>step3( |
| <span class="kw-2">mut </span>a: W32, |
| <span class="kw-2">mut </span>b: W32, |
| <span class="kw-2">mut </span>c: W32, |
| <span class="kw-2">mut </span>d: W32, |
| <span class="kw-2">mut </span>e: W32, |
| W: [W32; <span class="number">20</span>], |
| k: W32, |
| f: <span class="kw">impl </span>Fn(W32, W32, W32) -> W32, |
| ) -> (W32, W32, W32, W32, W32) { |
| <span class="kw">for </span>W_t <span class="kw">in </span>W.iter() { |
| <span class="kw">let </span>T = rotl(a, <span class="number">5</span>) + f(b, c, d) + e + k + W_t; |
| e = d; |
| d = c; |
| c = rotl(b, <span class="number">30</span>); |
| b = a; |
| a = T; |
| } |
| (a, b, c, d, e) |
| } |
| |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">fn </span>rotl(x: W32, n: u32) -> W32 { |
| Wrapping(x.<span class="number">0</span>.rotate_left(n)) |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="ring" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
