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| </pre><pre class="rust"><code><span class="comment">// Copyright 2019 The CryptoCorrosion Contributors</span> |
| <span class="comment">// Copyright 2020 Developers of the Rand project.</span> |
| <span class="comment">//</span> |
| <span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> |
| <span class="comment">// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> |
| <span class="comment">// <LICENSE-MIT or https://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">//! The ChaCha random number generator.</span> |
| |
| <span class="kw">use</span> <span class="ident">ppv_lite86</span>::{<span class="ident">dispatch</span>, <span class="ident">dispatch_light128</span>}; |
| |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="ident">ppv_lite86::Machine</span>; |
| <span class="kw">use</span> <span class="ident">ppv_lite86</span>::{<span class="ident">vec128_storage</span>, <span class="ident">ArithOps</span>, <span class="ident">BitOps32</span>, <span class="ident">LaneWords4</span>, <span class="ident">MultiLane</span>, <span class="ident">StoreBytes</span>, <span class="ident">Vec4</span>, <span class="ident">Vec4Ext</span>, <span class="ident">Vector</span>}; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">BLOCK</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">16</span>; |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">BLOCK64</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="ident">BLOCK</span> <span class="kw">as</span> <span class="ident">u64</span>; |
| <span class="kw">const</span> <span class="ident">LOG2_BUFBLOCKS</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="number">2</span>; |
| <span class="kw">const</span> <span class="ident">BUFBLOCKS</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="number">1</span> <span class="op"><</span><span class="op"><</span> <span class="ident">LOG2_BUFBLOCKS</span>; |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">BUFSZ64</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="ident">BLOCK64</span> <span class="op">*</span> <span class="ident">BUFBLOCKS</span>; |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">BUFSZ</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="ident">BUFSZ64</span> <span class="kw">as</span> <span class="ident">usize</span>; |
| |
| <span class="kw">const</span> <span class="ident">STREAM_PARAM_NONCE</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1</span>; |
| <span class="kw">const</span> <span class="ident">STREAM_PARAM_BLOCK</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">0</span>; |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ChaCha</span> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">b</span>: <span class="ident">vec128_storage</span>, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">c</span>: <span class="ident">vec128_storage</span>, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">d</span>: <span class="ident">vec128_storage</span>, |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">State</span><span class="op"><</span><span class="ident">V</span><span class="op">></span> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">a</span>: <span class="ident">V</span>, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">b</span>: <span class="ident">V</span>, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">c</span>: <span class="ident">V</span>, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">d</span>: <span class="ident">V</span>, |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">round</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">ArithOps</span> <span class="op">+</span> <span class="ident">BitOps32</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="ident">x</span>: <span class="ident">State</span><span class="op"><</span><span class="ident">V</span><span class="op">></span>) -> <span class="ident">State</span><span class="op"><</span><span class="ident">V</span><span class="op">></span> { |
| <span class="ident">x</span>.<span class="ident">a</span> <span class="op">+</span><span class="op">=</span> <span class="ident">x</span>.<span class="ident">b</span>; |
| <span class="ident">x</span>.<span class="ident">d</span> <span class="op">=</span> (<span class="ident">x</span>.<span class="ident">d</span> <span class="op">^</span> <span class="ident">x</span>.<span class="ident">a</span>).<span class="ident">rotate_each_word_right16</span>(); |
| <span class="ident">x</span>.<span class="ident">c</span> <span class="op">+</span><span class="op">=</span> <span class="ident">x</span>.<span class="ident">d</span>; |
| <span class="ident">x</span>.<span class="ident">b</span> <span class="op">=</span> (<span class="ident">x</span>.<span class="ident">b</span> <span class="op">^</span> <span class="ident">x</span>.<span class="ident">c</span>).<span class="ident">rotate_each_word_right20</span>(); |
| <span class="ident">x</span>.<span class="ident">a</span> <span class="op">+</span><span class="op">=</span> <span class="ident">x</span>.<span class="ident">b</span>; |
| <span class="ident">x</span>.<span class="ident">d</span> <span class="op">=</span> (<span class="ident">x</span>.<span class="ident">d</span> <span class="op">^</span> <span class="ident">x</span>.<span class="ident">a</span>).<span class="ident">rotate_each_word_right24</span>(); |
| <span class="ident">x</span>.<span class="ident">c</span> <span class="op">+</span><span class="op">=</span> <span class="ident">x</span>.<span class="ident">d</span>; |
| <span class="ident">x</span>.<span class="ident">b</span> <span class="op">=</span> (<span class="ident">x</span>.<span class="ident">b</span> <span class="op">^</span> <span class="ident">x</span>.<span class="ident">c</span>).<span class="ident">rotate_each_word_right25</span>(); |
| <span class="ident">x</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">diagonalize</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">LaneWords4</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="ident">x</span>: <span class="ident">State</span><span class="op"><</span><span class="ident">V</span><span class="op">></span>) -> <span class="ident">State</span><span class="op"><</span><span class="ident">V</span><span class="op">></span> { |
| <span class="ident">x</span>.<span class="ident">b</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">b</span>.<span class="ident">shuffle_lane_words3012</span>(); |
| <span class="ident">x</span>.<span class="ident">c</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">c</span>.<span class="ident">shuffle_lane_words2301</span>(); |
| <span class="ident">x</span>.<span class="ident">d</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">d</span>.<span class="ident">shuffle_lane_words1230</span>(); |
| <span class="ident">x</span> |
| } |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">undiagonalize</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">LaneWords4</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="ident">x</span>: <span class="ident">State</span><span class="op"><</span><span class="ident">V</span><span class="op">></span>) -> <span class="ident">State</span><span class="op"><</span><span class="ident">V</span><span class="op">></span> { |
| <span class="ident">x</span>.<span class="ident">b</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">b</span>.<span class="ident">shuffle_lane_words1230</span>(); |
| <span class="ident">x</span>.<span class="ident">c</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">c</span>.<span class="ident">shuffle_lane_words2301</span>(); |
| <span class="ident">x</span>.<span class="ident">d</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">d</span>.<span class="ident">shuffle_lane_words3012</span>(); |
| <span class="ident">x</span> |
| } |
| |
| <span class="kw">impl</span> <span class="ident">ChaCha</span> { |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">key</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>; <span class="number">32</span>], <span class="ident">nonce</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) -> <span class="self">Self</span> { |
| <span class="ident">init_chacha</span>(<span class="ident">key</span>, <span class="ident">nonce</span>) |
| } |
| |
| <span class="doccomment">/// Produce 4 blocks of output, advancing the state</span> |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">refill4</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">drounds</span>: <span class="ident">u32</span>, <span class="ident">out</span>: <span class="kw-2">&mut</span> [<span class="ident">u32</span>; <span class="ident">BUFSZ</span>]) { |
| <span class="ident">refill_wide</span>(<span class="self">self</span>, <span class="ident">drounds</span>, <span class="ident">out</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_block_pos</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">value</span>: <span class="ident">u64</span>) { |
| <span class="ident">set_stream_param</span>(<span class="self">self</span>, <span class="ident">STREAM_PARAM_BLOCK</span>, <span class="ident">value</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_block_pos</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">u64</span> { |
| <span class="ident">get_stream_param</span>(<span class="self">self</span>, <span class="ident">STREAM_PARAM_BLOCK</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_nonce</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">value</span>: <span class="ident">u64</span>) { |
| <span class="ident">set_stream_param</span>(<span class="self">self</span>, <span class="ident">STREAM_PARAM_NONCE</span>, <span class="ident">value</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_nonce</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">u64</span> { |
| <span class="ident">get_stream_param</span>(<span class="self">self</span>, <span class="ident">STREAM_PARAM_NONCE</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_seed</span>(<span class="kw-2">&</span><span class="self">self</span>) -> [<span class="ident">u8</span>; <span class="number">32</span>] { |
| <span class="ident">get_seed</span>(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="comment">// This implementation is platform-independent.</span> |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_endian</span> <span class="op">=</span> <span class="string">"big"</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">add_pos</span><span class="op"><</span><span class="ident">Mach</span>: <span class="ident">Machine</span><span class="op">></span>(<span class="ident">_m</span>: <span class="ident">Mach</span>, <span class="ident">d0</span>: <span class="ident">Mach::u32x4</span>, <span class="ident">i</span>: <span class="ident">u64</span>) -> <span class="ident">Mach::u32x4</span> { |
| <span class="kw">let</span> <span class="ident">pos0</span> <span class="op">=</span> ((<span class="ident">d0</span>.<span class="ident">extract</span>(<span class="number">1</span>) <span class="kw">as</span> <span class="ident">u64</span>) <span class="op"><</span><span class="op"><</span> <span class="number">32</span>) <span class="op">|</span> <span class="ident">d0</span>.<span class="ident">extract</span>(<span class="number">0</span>) <span class="kw">as</span> <span class="ident">u64</span>; |
| <span class="kw">let</span> <span class="ident">pos</span> <span class="op">=</span> <span class="ident">pos0</span>.<span class="ident">wrapping_add</span>(<span class="ident">i</span>); |
| <span class="ident">d0</span>.<span class="ident">insert</span>((<span class="ident">pos</span> <span class="op">></span><span class="op">></span> <span class="number">32</span>) <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">1</span>).<span class="ident">insert</span>(<span class="ident">pos</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">0</span>) |
| } |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_endian</span> <span class="op">=</span> <span class="string">"big"</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">d0123</span><span class="op"><</span><span class="ident">Mach</span>: <span class="ident">Machine</span><span class="op">></span>(<span class="ident">m</span>: <span class="ident">Mach</span>, <span class="ident">d</span>: <span class="ident">vec128_storage</span>) -> <span class="ident">Mach::u32x4x4</span> { |
| <span class="kw">let</span> <span class="ident">d0</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">d</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">pos</span> <span class="op">=</span> ((<span class="ident">d0</span>.<span class="ident">extract</span>(<span class="number">1</span>) <span class="kw">as</span> <span class="ident">u64</span>) <span class="op"><</span><span class="op"><</span> <span class="number">32</span>) <span class="op">|</span> <span class="ident">d0</span>.<span class="ident">extract</span>(<span class="number">0</span>) <span class="kw">as</span> <span class="ident">u64</span>; |
| <span class="ident">pos</span> <span class="op">=</span> <span class="ident">pos</span>.<span class="ident">wrapping_add</span>(<span class="number">1</span>); |
| <span class="kw">let</span> <span class="ident">d1</span> <span class="op">=</span> <span class="ident">d0</span>.<span class="ident">insert</span>((<span class="ident">pos</span> <span class="op">></span><span class="op">></span> <span class="number">32</span>) <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">1</span>).<span class="ident">insert</span>(<span class="ident">pos</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">0</span>); |
| <span class="ident">pos</span> <span class="op">=</span> <span class="ident">pos</span>.<span class="ident">wrapping_add</span>(<span class="number">1</span>); |
| <span class="kw">let</span> <span class="ident">d2</span> <span class="op">=</span> <span class="ident">d0</span>.<span class="ident">insert</span>((<span class="ident">pos</span> <span class="op">></span><span class="op">></span> <span class="number">32</span>) <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">1</span>).<span class="ident">insert</span>(<span class="ident">pos</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">0</span>); |
| <span class="ident">pos</span> <span class="op">=</span> <span class="ident">pos</span>.<span class="ident">wrapping_add</span>(<span class="number">1</span>); |
| <span class="kw">let</span> <span class="ident">d3</span> <span class="op">=</span> <span class="ident">d0</span>.<span class="ident">insert</span>((<span class="ident">pos</span> <span class="op">></span><span class="op">></span> <span class="number">32</span>) <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">1</span>).<span class="ident">insert</span>(<span class="ident">pos</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="number">0</span>); |
| <span class="ident">Mach::u32x4x4::from_lanes</span>([<span class="ident">d0</span>, <span class="ident">d1</span>, <span class="ident">d2</span>, <span class="ident">d3</span>]) |
| } |
| |
| <span class="comment">// Pos is packed into the state vectors as a little-endian u64,</span> |
| <span class="comment">// so on LE platforms we can use native vector ops to increment it.</span> |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_endian</span> <span class="op">=</span> <span class="string">"little"</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">add_pos</span><span class="op"><</span><span class="ident">Mach</span>: <span class="ident">Machine</span><span class="op">></span>(<span class="ident">m</span>: <span class="ident">Mach</span>, <span class="ident">d</span>: <span class="ident">Mach::u32x4</span>, <span class="ident">i</span>: <span class="ident">u64</span>) -> <span class="ident">Mach::u32x4</span> { |
| <span class="kw">let</span> <span class="ident">d0</span>: <span class="ident">Mach::u64x2</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">d</span>.<span class="ident">into</span>()); |
| <span class="kw">let</span> <span class="ident">incr</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">vec</span>([<span class="ident">i</span>, <span class="number">0</span>]); |
| <span class="ident">m</span>.<span class="ident">unpack</span>((<span class="ident">d0</span> <span class="op">+</span> <span class="ident">incr</span>).<span class="ident">into</span>()) |
| } |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_endian</span> <span class="op">=</span> <span class="string">"little"</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">d0123</span><span class="op"><</span><span class="ident">Mach</span>: <span class="ident">Machine</span><span class="op">></span>(<span class="ident">m</span>: <span class="ident">Mach</span>, <span class="ident">d</span>: <span class="ident">vec128_storage</span>) -> <span class="ident">Mach::u32x4x4</span> { |
| <span class="kw">let</span> <span class="ident">d0</span>: <span class="ident">Mach::u64x2</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">d</span>); |
| <span class="kw">let</span> <span class="ident">incr</span> <span class="op">=</span> <span class="ident">Mach::u64x2x4::from_lanes</span>([<span class="ident">m</span>.<span class="ident">vec</span>([<span class="number">0</span>, <span class="number">0</span>]), <span class="ident">m</span>.<span class="ident">vec</span>([<span class="number">1</span>, <span class="number">0</span>]), <span class="ident">m</span>.<span class="ident">vec</span>([<span class="number">2</span>, <span class="number">0</span>]), <span class="ident">m</span>.<span class="ident">vec</span>([<span class="number">3</span>, <span class="number">0</span>])]); |
| <span class="ident">m</span>.<span class="ident">unpack</span>((<span class="ident">Mach::u64x2x4::from_lanes</span>([<span class="ident">d0</span>, <span class="ident">d0</span>, <span class="ident">d0</span>, <span class="ident">d0</span>]) <span class="op">+</span> <span class="ident">incr</span>).<span class="ident">into</span>()) |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy::many_single_char_names</span>)]</span> |
| <span class="attribute">#[<span class="ident">inline</span>(<span class="ident">always</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">refill_wide_impl</span><span class="op"><</span><span class="ident">Mach</span>: <span class="ident">Machine</span><span class="op">></span>( |
| <span class="ident">m</span>: <span class="ident">Mach</span>, <span class="ident">state</span>: <span class="kw-2">&mut</span> <span class="ident">ChaCha</span>, <span class="ident">drounds</span>: <span class="ident">u32</span>, <span class="ident">out</span>: <span class="kw-2">&mut</span> [<span class="ident">u32</span>; <span class="ident">BUFSZ</span>], |
| ) { |
| <span class="kw">let</span> <span class="ident">k</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">vec</span>([<span class="number">0x6170_7865</span>, <span class="number">0x3320_646e</span>, <span class="number">0x7962_2d32</span>, <span class="number">0x6b20_6574</span>]); |
| <span class="kw">let</span> <span class="ident">b</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">b</span>); |
| <span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">c</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span> <span class="op">=</span> <span class="ident">State</span> { |
| <span class="ident">a</span>: <span class="ident">Mach::u32x4x4::from_lanes</span>([<span class="ident">k</span>, <span class="ident">k</span>, <span class="ident">k</span>, <span class="ident">k</span>]), |
| <span class="ident">b</span>: <span class="ident">Mach::u32x4x4::from_lanes</span>([<span class="ident">b</span>, <span class="ident">b</span>, <span class="ident">b</span>, <span class="ident">b</span>]), |
| <span class="ident">c</span>: <span class="ident">Mach::u32x4x4::from_lanes</span>([<span class="ident">c</span>, <span class="ident">c</span>, <span class="ident">c</span>, <span class="ident">c</span>]), |
| <span class="ident">d</span>: <span class="ident">d0123</span>(<span class="ident">m</span>, <span class="ident">state</span>.<span class="ident">d</span>), |
| }; |
| <span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">drounds</span> { |
| <span class="ident">x</span> <span class="op">=</span> <span class="ident">round</span>(<span class="ident">x</span>); |
| <span class="ident">x</span> <span class="op">=</span> <span class="ident">undiagonalize</span>(<span class="ident">round</span>(<span class="ident">diagonalize</span>(<span class="ident">x</span>))); |
| } |
| <span class="kw">let</span> <span class="ident">kk</span> <span class="op">=</span> <span class="ident">Mach::u32x4x4::from_lanes</span>([<span class="ident">k</span>, <span class="ident">k</span>, <span class="ident">k</span>, <span class="ident">k</span>]); |
| <span class="kw">let</span> <span class="ident">sb</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">b</span>); |
| <span class="kw">let</span> <span class="ident">sb</span> <span class="op">=</span> <span class="ident">Mach::u32x4x4::from_lanes</span>([<span class="ident">sb</span>, <span class="ident">sb</span>, <span class="ident">sb</span>, <span class="ident">sb</span>]); |
| <span class="kw">let</span> <span class="ident">sc</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">c</span>); |
| <span class="kw">let</span> <span class="ident">sc</span> <span class="op">=</span> <span class="ident">Mach::u32x4x4::from_lanes</span>([<span class="ident">sc</span>, <span class="ident">sc</span>, <span class="ident">sc</span>, <span class="ident">sc</span>]); |
| <span class="kw">let</span> <span class="ident">sd</span> <span class="op">=</span> <span class="ident">d0123</span>(<span class="ident">m</span>, <span class="ident">state</span>.<span class="ident">d</span>); |
| <span class="kw">let</span> <span class="ident">results</span> <span class="op">=</span> <span class="ident">Mach::u32x4x4::transpose4</span>(<span class="ident">x</span>.<span class="ident">a</span> <span class="op">+</span> <span class="ident">kk</span>, <span class="ident">x</span>.<span class="ident">b</span> <span class="op">+</span> <span class="ident">sb</span>, <span class="ident">x</span>.<span class="ident">c</span> <span class="op">+</span> <span class="ident">sc</span>, <span class="ident">x</span>.<span class="ident">d</span> <span class="op">+</span> <span class="ident">sd</span>); |
| <span class="ident">out</span>[<span class="number">0</span>..<span class="number">16</span>].<span class="ident">copy_from_slice</span>(<span class="kw-2">&</span><span class="ident">results</span>.<span class="number">0</span>.<span class="ident">to_scalars</span>()); |
| <span class="ident">out</span>[<span class="number">16</span>..<span class="number">32</span>].<span class="ident">copy_from_slice</span>(<span class="kw-2">&</span><span class="ident">results</span>.<span class="number">1</span>.<span class="ident">to_scalars</span>()); |
| <span class="ident">out</span>[<span class="number">32</span>..<span class="number">48</span>].<span class="ident">copy_from_slice</span>(<span class="kw-2">&</span><span class="ident">results</span>.<span class="number">2</span>.<span class="ident">to_scalars</span>()); |
| <span class="ident">out</span>[<span class="number">48</span>..<span class="number">64</span>].<span class="ident">copy_from_slice</span>(<span class="kw-2">&</span><span class="ident">results</span>.<span class="number">3</span>.<span class="ident">to_scalars</span>()); |
| <span class="ident">state</span>.<span class="ident">d</span> <span class="op">=</span> <span class="ident">add_pos</span>(<span class="ident">m</span>, <span class="ident">sd</span>.<span class="ident">to_lanes</span>()[<span class="number">0</span>], <span class="number">4</span>).<span class="ident">into</span>(); |
| } |
| |
| <span class="macro">dispatch!</span>(<span class="ident">m</span>, <span class="ident">Mach</span>, { |
| <span class="kw">fn</span> <span class="ident">refill_wide</span>(<span class="ident">state</span>: <span class="kw-2">&mut</span> <span class="ident">ChaCha</span>, <span class="ident">drounds</span>: <span class="ident">u32</span>, <span class="ident">out</span>: <span class="kw-2">&mut</span> [<span class="ident">u32</span>; <span class="ident">BUFSZ</span>]) { |
| <span class="ident">refill_wide_impl</span>(<span class="ident">m</span>, <span class="ident">state</span>, <span class="ident">drounds</span>, <span class="ident">out</span>); |
| } |
| }); |
| |
| <span class="comment">// Single-block, rounds-only; shared by try_apply_keystream for tails shorter than BUFSZ</span> |
| <span class="comment">// and XChaCha's setup step.</span> |
| <span class="macro">dispatch!</span>(<span class="ident">m</span>, <span class="ident">Mach</span>, { |
| <span class="kw">fn</span> <span class="ident">refill_narrow_rounds</span>(<span class="ident">state</span>: <span class="kw-2">&mut</span> <span class="ident">ChaCha</span>, <span class="ident">drounds</span>: <span class="ident">u32</span>) -> <span class="ident">State</span><span class="op"><</span><span class="ident">vec128_storage</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">k</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">vec</span>([<span class="number">0x6170_7865</span>, <span class="number">0x3320_646e</span>, <span class="number">0x7962_2d32</span>, <span class="number">0x6b20_6574</span>]); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span> <span class="op">=</span> <span class="ident">State</span> { |
| <span class="ident">a</span>: <span class="ident">k</span>, |
| <span class="ident">b</span>: <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">b</span>), |
| <span class="ident">c</span>: <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">c</span>), |
| <span class="ident">d</span>: <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">d</span>), |
| }; |
| <span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">drounds</span> { |
| <span class="ident">x</span> <span class="op">=</span> <span class="ident">round</span>(<span class="ident">x</span>); |
| <span class="ident">x</span> <span class="op">=</span> <span class="ident">undiagonalize</span>(<span class="ident">round</span>(<span class="ident">diagonalize</span>(<span class="ident">x</span>))); |
| } |
| <span class="ident">State</span> { |
| <span class="ident">a</span>: <span class="ident">x</span>.<span class="ident">a</span>.<span class="ident">into</span>(), |
| <span class="ident">b</span>: <span class="ident">x</span>.<span class="ident">b</span>.<span class="ident">into</span>(), |
| <span class="ident">c</span>: <span class="ident">x</span>.<span class="ident">c</span>.<span class="ident">into</span>(), |
| <span class="ident">d</span>: <span class="ident">x</span>.<span class="ident">d</span>.<span class="ident">into</span>(), |
| } |
| } |
| }); |
| |
| <span class="macro">dispatch_light128!</span>(<span class="ident">m</span>, <span class="ident">Mach</span>, { |
| <span class="kw">fn</span> <span class="ident">set_stream_param</span>(<span class="ident">state</span>: <span class="kw-2">&mut</span> <span class="ident">ChaCha</span>, <span class="ident">param</span>: <span class="ident">u32</span>, <span class="ident">value</span>: <span class="ident">u64</span>) { |
| <span class="kw">let</span> <span class="ident">d</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">d</span>); |
| <span class="ident">state</span>.<span class="ident">d</span> <span class="op">=</span> <span class="ident">d</span> |
| .<span class="ident">insert</span>((<span class="ident">value</span> <span class="op">></span><span class="op">></span> <span class="number">32</span>) <span class="kw">as</span> <span class="ident">u32</span>, (<span class="ident">param</span> <span class="op"><</span><span class="op"><</span> <span class="number">1</span>) <span class="op">|</span> <span class="number">1</span>) |
| .<span class="ident">insert</span>(<span class="ident">value</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="ident">param</span> <span class="op"><</span><span class="op"><</span> <span class="number">1</span>) |
| .<span class="ident">into</span>(); |
| } |
| }); |
| |
| <span class="macro">dispatch_light128!</span>(<span class="ident">m</span>, <span class="ident">Mach</span>, { |
| <span class="kw">fn</span> <span class="ident">get_stream_param</span>(<span class="ident">state</span>: <span class="kw-2">&</span><span class="ident">ChaCha</span>, <span class="ident">param</span>: <span class="ident">u32</span>) -> <span class="ident">u64</span> { |
| <span class="kw">let</span> <span class="ident">d</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">d</span>); |
| ((<span class="ident">d</span>.<span class="ident">extract</span>((<span class="ident">param</span> <span class="op"><</span><span class="op"><</span> <span class="number">1</span>) <span class="op">|</span> <span class="number">1</span>) <span class="kw">as</span> <span class="ident">u64</span>) <span class="op"><</span><span class="op"><</span> <span class="number">32</span>) <span class="op">|</span> <span class="ident">d</span>.<span class="ident">extract</span>(<span class="ident">param</span> <span class="op"><</span><span class="op"><</span> <span class="number">1</span>) <span class="kw">as</span> <span class="ident">u64</span> |
| } |
| }); |
| |
| <span class="macro">dispatch_light128!</span>(<span class="ident">m</span>, <span class="ident">Mach</span>, { |
| <span class="kw">fn</span> <span class="ident">get_seed</span>(<span class="ident">state</span>: <span class="kw-2">&</span><span class="ident">ChaCha</span>) -> [<span class="ident">u8</span>; <span class="number">32</span>] { |
| <span class="kw">let</span> <span class="ident">b</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">b</span>); |
| <span class="kw">let</span> <span class="ident">c</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">unpack</span>(<span class="ident">state</span>.<span class="ident">c</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">key</span> <span class="op">=</span> [<span class="number">0u8</span>; <span class="number">32</span>]; |
| <span class="ident">b</span>.<span class="ident">write_le</span>(<span class="kw-2">&mut</span> <span class="ident">key</span>[..<span class="number">16</span>]); |
| <span class="ident">c</span>.<span class="ident">write_le</span>(<span class="kw-2">&mut</span> <span class="ident">key</span>[<span class="number">16</span>..]); |
| <span class="ident">key</span> |
| } |
| }); |
| |
| <span class="kw">fn</span> <span class="ident">read_u32le</span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) -> <span class="ident">u32</span> { |
| <span class="macro">assert_eq!</span>(<span class="ident">xs</span>.<span class="ident">len</span>(), <span class="number">4</span>); |
| <span class="ident">u32::from</span>(<span class="ident">xs</span>[<span class="number">0</span>]) <span class="op">|</span> (<span class="ident">u32::from</span>(<span class="ident">xs</span>[<span class="number">1</span>]) <span class="op"><</span><span class="op"><</span> <span class="number">8</span>) <span class="op">|</span> (<span class="ident">u32::from</span>(<span class="ident">xs</span>[<span class="number">2</span>]) <span class="op"><</span><span class="op"><</span> <span class="number">16</span>) <span class="op">|</span> (<span class="ident">u32::from</span>(<span class="ident">xs</span>[<span class="number">3</span>]) <span class="op"><</span><span class="op"><</span> <span class="number">24</span>) |
| } |
| |
| <span class="macro">dispatch_light128!</span>(<span class="ident">m</span>, <span class="ident">Mach</span>, { |
| <span class="kw">fn</span> <span class="ident">init_chacha</span>(<span class="ident">key</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>; <span class="number">32</span>], <span class="ident">nonce</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) -> <span class="ident">ChaCha</span> { |
| <span class="kw">let</span> <span class="ident">ctr_nonce</span> <span class="op">=</span> [ |
| <span class="number">0</span>, |
| <span class="kw">if</span> <span class="ident">nonce</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">12</span> { |
| <span class="ident">read_u32le</span>(<span class="kw-2">&</span><span class="ident">nonce</span>[<span class="number">0</span>..<span class="number">4</span>]) |
| } <span class="kw">else</span> { |
| <span class="number">0</span> |
| }, |
| <span class="ident">read_u32le</span>(<span class="kw-2">&</span><span class="ident">nonce</span>[<span class="ident">nonce</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">8</span>..<span class="ident">nonce</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">4</span>]), |
| <span class="ident">read_u32le</span>(<span class="kw-2">&</span><span class="ident">nonce</span>[<span class="ident">nonce</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">4</span>..]), |
| ]; |
| <span class="kw">let</span> <span class="ident">key0</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">read_le</span>(<span class="kw-2">&</span><span class="ident">key</span>[..<span class="number">16</span>]); |
| <span class="kw">let</span> <span class="ident">key1</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">read_le</span>(<span class="kw-2">&</span><span class="ident">key</span>[<span class="number">16</span>..]); |
| <span class="ident">ChaCha</span> { |
| <span class="ident">b</span>: <span class="ident">key0</span>.<span class="ident">into</span>(), |
| <span class="ident">c</span>: <span class="ident">key1</span>.<span class="ident">into</span>(), |
| <span class="ident">d</span>: <span class="ident">ctr_nonce</span>.<span class="ident">into</span>(), |
| } |
| } |
| }); |
| |
| <span class="macro">dispatch_light128!</span>(<span class="ident">m</span>, <span class="ident">Mach</span>, { |
| <span class="kw">fn</span> <span class="ident">init_chacha_x</span>(<span class="ident">key</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>; <span class="number">32</span>], <span class="ident">nonce</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>; <span class="number">24</span>], <span class="ident">rounds</span>: <span class="ident">u32</span>) -> <span class="ident">ChaCha</span> { |
| <span class="kw">let</span> <span class="ident">key0</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">read_le</span>(<span class="kw-2">&</span><span class="ident">key</span>[..<span class="number">16</span>]); |
| <span class="kw">let</span> <span class="ident">key1</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">read_le</span>(<span class="kw-2">&</span><span class="ident">key</span>[<span class="number">16</span>..]); |
| <span class="kw">let</span> <span class="ident">nonce0</span>: <span class="ident">Mach::u32x4</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">read_le</span>(<span class="kw-2">&</span><span class="ident">nonce</span>[..<span class="number">16</span>]); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">state</span> <span class="op">=</span> <span class="ident">ChaCha</span> { |
| <span class="ident">b</span>: <span class="ident">key0</span>.<span class="ident">into</span>(), |
| <span class="ident">c</span>: <span class="ident">key1</span>.<span class="ident">into</span>(), |
| <span class="ident">d</span>: <span class="ident">nonce0</span>.<span class="ident">into</span>(), |
| }; |
| <span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="ident">refill_narrow_rounds</span>(<span class="kw-2">&mut</span> <span class="ident">state</span>, <span class="ident">rounds</span>); |
| <span class="kw">let</span> <span class="ident">ctr_nonce1</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>, <span class="ident">read_u32le</span>(<span class="kw-2">&</span><span class="ident">nonce</span>[<span class="number">16</span>..<span class="number">20</span>]), <span class="ident">read_u32le</span>(<span class="kw-2">&</span><span class="ident">nonce</span>[<span class="number">20</span>..<span class="number">24</span>])]; |
| <span class="ident">state</span>.<span class="ident">b</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">a</span>; |
| <span class="ident">state</span>.<span class="ident">c</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">d</span>; |
| <span class="ident">state</span>.<span class="ident">d</span> <span class="op">=</span> <span class="ident">ctr_nonce1</span>.<span class="ident">into</span>(); |
| <span class="ident">state</span> |
| } |
| }); |
| </code></pre></div> |
| </section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="rand_chacha" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.60.0-nightly (1bd4fdc94 2022-01-12)" ></div> |
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