| <!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/registry/src/github.com-1ecc6299db9ec823/ring-0.16.20/src/aead/aes.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>aes.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 2018 Brian Smith. |
| // |
| // 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 super</span>::{counter, iv::Iv, quic::Sample, Block, Direction, BLOCK_LEN}; |
| <span class="kw">use crate</span>::{bits::BitLength, c, cpu, endian::<span class="kw-2">*</span>, error, polyfill}; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Key { |
| inner: AES_KEY, |
| cpu_features: cpu::Features, |
| } |
| |
| <span class="macro">macro_rules! </span>set_encrypt_key { |
| ( <span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$bytes</span>:expr, <span class="macro-nonterminal">$key_bits</span>:expr, <span class="macro-nonterminal">$key</span>:expr ) => {{ |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span><span class="macro-nonterminal">$name</span>(user_key: <span class="kw-2">*const </span>u8, bits: c::uint, key: <span class="kw-2">&mut </span>AES_KEY) -> c::int; |
| } |
| set_encrypt_key(<span class="macro-nonterminal">$name</span>, <span class="macro-nonterminal">$bytes</span>, <span class="macro-nonterminal">$key_bits</span>, <span class="macro-nonterminal">$key</span>) |
| }}; |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>set_encrypt_key( |
| f: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(<span class="kw-2">*const </span>u8, c::uint, <span class="kw-2">&mut </span>AES_KEY) -> c::int, |
| bytes: <span class="kw-2">&</span>[u8], |
| key_bits: BitLength, |
| key: <span class="kw-2">&mut </span>AES_KEY, |
| ) -> <span class="prelude-ty">Result</span><(), error::Unspecified> { |
| <span class="comment">// Unusually, in this case zero means success and non-zero means failure. |
| </span><span class="kw">if </span><span class="number">0 </span>== <span class="kw">unsafe </span>{ f(bytes.as_ptr(), key_bits.as_usize_bits() <span class="kw">as </span>c::uint, key) } { |
| <span class="prelude-val">Ok</span>(()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(error::Unspecified) |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>encrypt_block { |
| (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$block</span>:expr, <span class="macro-nonterminal">$key</span>:expr) => {{ |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span><span class="macro-nonterminal">$name</span>(a: <span class="kw-2">&</span>Block, r: <span class="kw-2">*mut </span>Block, key: <span class="kw-2">&</span>AES_KEY); |
| } |
| encrypt_block_(<span class="macro-nonterminal">$name</span>, <span class="macro-nonterminal">$block</span>, <span class="macro-nonterminal">$key</span>) |
| }}; |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>encrypt_block_( |
| f: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(<span class="kw-2">&</span>Block, <span class="kw-2">*mut </span>Block, <span class="kw-2">&</span>AES_KEY), |
| a: Block, |
| key: <span class="kw-2">&</span>Key, |
| ) -> Block { |
| <span class="kw">let </span><span class="kw-2">mut </span>result = core::mem::MaybeUninit::uninit(); |
| <span class="kw">unsafe </span>{ |
| f(<span class="kw-2">&</span>a, result.as_mut_ptr(), <span class="kw-2">&</span>key.inner); |
| result.assume_init() |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>ctr32_encrypt_blocks { |
| (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$in_out</span>:expr, <span class="macro-nonterminal">$in_prefix_len</span>:expr, <span class="macro-nonterminal">$key</span>:expr, <span class="macro-nonterminal">$ivec</span>:expr ) => {{ |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span><span class="macro-nonterminal">$name</span>( |
| input: <span class="kw-2">*const </span>u8, |
| output: <span class="kw-2">*mut </span>u8, |
| blocks: c::size_t, |
| key: <span class="kw-2">&</span>AES_KEY, |
| ivec: <span class="kw-2">&</span>Counter, |
| ); |
| } |
| ctr32_encrypt_blocks_(<span class="macro-nonterminal">$name</span>, <span class="macro-nonterminal">$in_out</span>, <span class="macro-nonterminal">$in_prefix_len</span>, <span class="macro-nonterminal">$key</span>, <span class="macro-nonterminal">$ivec</span>) |
| }}; |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>ctr32_encrypt_blocks_( |
| f: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>( |
| input: <span class="kw-2">*const </span>u8, |
| output: <span class="kw-2">*mut </span>u8, |
| blocks: c::size_t, |
| key: <span class="kw-2">&</span>AES_KEY, |
| ivec: <span class="kw-2">&</span>Counter, |
| ), |
| in_out: <span class="kw-2">&mut </span>[u8], |
| in_prefix_len: usize, |
| key: <span class="kw-2">&</span>AES_KEY, |
| ctr: <span class="kw-2">&mut </span>Counter, |
| ) { |
| <span class="kw">let </span>in_out_len = in_out.len().checked_sub(in_prefix_len).unwrap(); |
| <span class="macro">assert_eq!</span>(in_out_len % BLOCK_LEN, <span class="number">0</span>); |
| |
| <span class="kw">let </span>blocks = in_out_len / BLOCK_LEN; |
| <span class="kw">let </span>blocks_u32 = blocks <span class="kw">as </span>u32; |
| <span class="macro">assert_eq!</span>(blocks, polyfill::usize_from_u32(blocks_u32)); |
| |
| <span class="kw">let </span>input = in_out[in_prefix_len..].as_ptr(); |
| <span class="kw">let </span>output = in_out.as_mut_ptr(); |
| |
| <span class="kw">unsafe </span>{ |
| f(input, output, blocks, <span class="kw-2">&</span>key, ctr); |
| } |
| ctr.increment_by_less_safe(blocks_u32); |
| } |
| |
| <span class="kw">impl </span>Key { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>new( |
| bytes: <span class="kw-2">&</span>[u8], |
| variant: Variant, |
| cpu_features: cpu::Features, |
| ) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, error::Unspecified> { |
| <span class="kw">let </span>key_bits = <span class="kw">match </span>variant { |
| Variant::AES_128 => BitLength::from_usize_bits(<span class="number">128</span>), |
| Variant::AES_256 => BitLength::from_usize_bits(<span class="number">256</span>), |
| }; |
| <span class="kw">if </span>BitLength::from_usize_bytes(bytes.len())<span class="question-mark">? </span>!= key_bits { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(error::Unspecified); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>key = AES_KEY { |
| rd_key: [<span class="number">0u32</span>; <span class="number">4 </span>* (MAX_ROUNDS + <span class="number">1</span>)], |
| rounds: <span class="number">0</span>, |
| }; |
| |
| <span class="kw">match </span>detect_implementation(cpu_features) { |
| <span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>Implementation::HWAES => { |
| <span class="macro">set_encrypt_key!</span>(GFp_aes_hw_set_encrypt_key, bytes, key_bits, <span class="kw-2">&mut </span>key)<span class="question-mark">? |
| </span>} |
| |
| <span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>Implementation::VPAES_BSAES => { |
| <span class="macro">set_encrypt_key!</span>(GFp_vpaes_set_encrypt_key, bytes, key_bits, <span class="kw-2">&mut </span>key)<span class="question-mark">? |
| </span>} |
| |
| <span class="attribute">#[cfg(not(target_arch = <span class="string">"aarch64"</span>))] |
| </span>Implementation::NOHW => { |
| <span class="macro">set_encrypt_key!</span>(GFp_aes_nohw_set_encrypt_key, bytes, key_bits, <span class="kw-2">&mut </span>key)<span class="question-mark">? |
| </span>} |
| }; |
| |
| <span class="prelude-val">Ok</span>(<span class="self">Self </span>{ |
| inner: key, |
| cpu_features, |
| }) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>encrypt_block(<span class="kw-2">&</span><span class="self">self</span>, a: Block) -> Block { |
| <span class="kw">match </span>detect_implementation(<span class="self">self</span>.cpu_features) { |
| <span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>Implementation::HWAES => <span class="macro">encrypt_block!</span>(GFp_aes_hw_encrypt, a, <span class="self">self</span>), |
| |
| <span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>Implementation::VPAES_BSAES => <span class="macro">encrypt_block!</span>(GFp_vpaes_encrypt, a, <span class="self">self</span>), |
| |
| <span class="attribute">#[cfg(not(target_arch = <span class="string">"aarch64"</span>))] |
| </span>Implementation::NOHW => <span class="macro">encrypt_block!</span>(GFp_aes_nohw_encrypt, a, <span class="self">self</span>), |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>encrypt_iv_xor_block(<span class="kw-2">&</span><span class="self">self</span>, iv: Iv, input: Block) -> Block { |
| <span class="kw">let </span><span class="kw-2">mut </span>output = <span class="self">self</span>.encrypt_block(Block::from(<span class="kw-2">&</span>iv.into_bytes_less_safe())); |
| output.bitxor_assign(input); |
| output |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>ctr32_encrypt_blocks( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| in_out: <span class="kw-2">&mut </span>[u8], |
| direction: Direction, |
| ctr: <span class="kw-2">&mut </span>Counter, |
| ) { |
| <span class="kw">let </span>in_prefix_len = <span class="kw">match </span>direction { |
| Direction::Opening { in_prefix_len } => in_prefix_len, |
| Direction::Sealing => <span class="number">0</span>, |
| }; |
| |
| <span class="kw">let </span>in_out_len = in_out.len().checked_sub(in_prefix_len).unwrap(); |
| |
| <span class="macro">assert_eq!</span>(in_out_len % BLOCK_LEN, <span class="number">0</span>); |
| |
| <span class="kw">match </span>detect_implementation(<span class="self">self</span>.cpu_features) { |
| <span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>Implementation::HWAES => <span class="macro">ctr32_encrypt_blocks!</span>( |
| GFp_aes_hw_ctr32_encrypt_blocks, |
| in_out, |
| in_prefix_len, |
| <span class="kw-2">&</span><span class="self">self</span>.inner, |
| ctr |
| ), |
| |
| <span class="attribute">#[cfg(any(target_arch = <span class="string">"aarch64"</span>, target_arch = <span class="string">"arm"</span>, target_arch = <span class="string">"x86_64"</span>))] |
| </span>Implementation::VPAES_BSAES => { |
| <span class="comment">// 8 blocks is the cut-off point where it's faster to use BSAES. |
| </span><span class="attribute">#[cfg(target_arch = <span class="string">"arm"</span>)] |
| </span><span class="kw">let </span>in_out = <span class="kw">if </span>in_out_len >= <span class="number">8 </span>* BLOCK_LEN { |
| <span class="kw">let </span>remainder = in_out_len % (<span class="number">8 </span>* BLOCK_LEN); |
| <span class="kw">let </span>bsaes_in_out_len = <span class="kw">if </span>remainder < (<span class="number">4 </span>* BLOCK_LEN) { |
| in_out_len - remainder |
| } <span class="kw">else </span>{ |
| in_out_len |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>bsaes_key = AES_KEY { |
| rd_key: [<span class="number">0u32</span>; <span class="number">4 </span>* (MAX_ROUNDS + <span class="number">1</span>)], |
| rounds: <span class="number">0</span>, |
| }; |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_vpaes_encrypt_key_to_bsaes( |
| bsaes_key: <span class="kw-2">&mut </span>AES_KEY, |
| vpaes_key: <span class="kw-2">&</span>AES_KEY, |
| ); |
| } |
| <span class="kw">unsafe </span>{ |
| GFp_vpaes_encrypt_key_to_bsaes(<span class="kw-2">&mut </span>bsaes_key, <span class="kw-2">&</span><span class="self">self</span>.inner); |
| } |
| <span class="macro">ctr32_encrypt_blocks!</span>( |
| GFp_bsaes_ctr32_encrypt_blocks, |
| <span class="kw-2">&mut </span>in_out[..(bsaes_in_out_len + in_prefix_len)], |
| in_prefix_len, |
| <span class="kw-2">&</span>bsaes_key, |
| ctr |
| ); |
| |
| <span class="kw-2">&mut </span>in_out[bsaes_in_out_len..] |
| } <span class="kw">else </span>{ |
| in_out |
| }; |
| |
| <span class="macro">ctr32_encrypt_blocks!</span>( |
| GFp_vpaes_ctr32_encrypt_blocks, |
| in_out, |
| in_prefix_len, |
| <span class="kw-2">&</span><span class="self">self</span>.inner, |
| ctr |
| ) |
| } |
| |
| <span class="attribute">#[cfg(any(target_arch = <span class="string">"x86"</span>))] |
| </span>Implementation::VPAES_BSAES => { |
| <span class="kw">super</span>::shift::shift_full_blocks(in_out, in_prefix_len, |input| { |
| <span class="self">self</span>.encrypt_iv_xor_block(ctr.increment(), Block::from(input)) |
| }); |
| } |
| |
| <span class="attribute">#[cfg(not(target_arch = <span class="string">"aarch64"</span>))] |
| </span>Implementation::NOHW => <span class="macro">ctr32_encrypt_blocks!</span>( |
| GFp_aes_nohw_ctr32_encrypt_blocks, |
| in_out, |
| in_prefix_len, |
| <span class="kw-2">&</span><span class="self">self</span>.inner, |
| ctr |
| ), |
| } |
| } |
| |
| <span class="kw">pub fn </span>new_mask(<span class="kw-2">&</span><span class="self">self</span>, sample: Sample) -> [u8; <span class="number">5</span>] { |
| <span class="kw">let </span>block = <span class="self">self</span>.encrypt_block(Block::from(<span class="kw-2">&</span>sample)); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>out: [u8; <span class="number">5</span>] = [<span class="number">0</span>; <span class="number">5</span>]; |
| out.copy_from_slice(<span class="kw-2">&</span>block.as_ref()[..<span class="number">5</span>]); |
| |
| out |
| } |
| |
| <span class="comment">// TODO: use `matches!` when MSRV increases to 1.42.0 and remove this |
| // `#[allow(...)]` |
| </span><span class="attribute">#[allow(clippy::unknown_clippy_lints)] |
| #[allow(clippy::match_like_matches_macro)] |
| #[cfg(target_arch = <span class="string">"x86_64"</span>)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>is_aes_hw(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span>detect_implementation(<span class="self">self</span>.cpu_features) { |
| Implementation::HWAES => <span class="bool-val">true</span>, |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="attribute">#[cfg(target_arch = <span class="string">"x86_64"</span>)] |
| #[must_use] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>inner_less_safe(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>AES_KEY { |
| <span class="kw-2">&</span><span class="self">self</span>.inner |
| } |
| } |
| |
| <span class="comment">// Keep this in sync with AES_KEY in aes.h. |
| </span><span class="attribute">#[repr(C)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>AES_KEY { |
| <span class="kw">pub </span>rd_key: [u32; <span class="number">4 </span>* (MAX_ROUNDS + <span class="number">1</span>)], |
| <span class="kw">pub </span>rounds: c::uint, |
| } |
| |
| <span class="comment">// Keep this in sync with `AES_MAXNR` in aes.h. |
| </span><span class="kw">const </span>MAX_ROUNDS: usize = <span class="number">14</span>; |
| |
| <span class="kw">pub enum </span>Variant { |
| AES_128, |
| AES_256, |
| } |
| |
| <span class="kw">pub type </span>Counter = counter::Counter<BigEndian<u32>>; |
| |
| <span class="attribute">#[repr(C)] </span><span class="comment">// Only so `Key` can be `#[repr(C)]` |
| </span><span class="attribute">#[derive(Clone, Copy)] |
| </span><span class="kw">pub enum </span>Implementation { |
| <span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>HWAES = <span class="number">1</span>, |
| |
| <span class="comment">// On "arm" only, this indicates that the bsaes implementation may be used. |
| </span><span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>VPAES_BSAES = <span class="number">2</span>, |
| |
| <span class="attribute">#[cfg(not(target_arch = <span class="string">"aarch64"</span>))] |
| </span>NOHW = <span class="number">3</span>, |
| } |
| |
| <span class="kw">fn </span>detect_implementation(cpu_features: cpu::Features) -> Implementation { |
| <span class="comment">// `cpu_features` is only used for specific platforms. |
| </span><span class="attribute">#[cfg(not(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>)))] |
| </span><span class="kw">let </span>_cpu_features = cpu_features; |
| |
| <span class="attribute">#[cfg(any( |
| target_arch = <span class="string">"aarch64"</span>, |
| target_arch = <span class="string">"arm"</span>, |
| target_arch = <span class="string">"x86_64"</span>, |
| target_arch = <span class="string">"x86" |
| </span>))] |
| </span>{ |
| <span class="kw">if </span>cpu::intel::AES.available(cpu_features) || cpu::arm::AES.available(cpu_features) { |
| <span class="kw">return </span>Implementation::HWAES; |
| } |
| } |
| |
| <span class="attribute">#[cfg(any(target_arch = <span class="string">"x86_64"</span>, target_arch = <span class="string">"x86"</span>))] |
| </span>{ |
| <span class="kw">if </span>cpu::intel::SSSE3.available(cpu_features) { |
| <span class="kw">return </span>Implementation::VPAES_BSAES; |
| } |
| } |
| |
| <span class="attribute">#[cfg(target_arch = <span class="string">"arm"</span>)] |
| </span>{ |
| <span class="kw">if </span>cpu::arm::NEON.available(cpu_features) { |
| <span class="kw">return </span>Implementation::VPAES_BSAES; |
| } |
| } |
| |
| <span class="attribute">#[cfg(target_arch = <span class="string">"aarch64"</span>)] |
| </span>{ |
| Implementation::VPAES_BSAES |
| } |
| |
| <span class="attribute">#[cfg(not(target_arch = <span class="string">"aarch64"</span>))] |
| </span>{ |
| Implementation::NOHW |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::{<span class="kw">super</span>::BLOCK_LEN, <span class="kw-2">*</span>}; |
| <span class="kw">use </span><span class="kw">crate</span>::test; |
| <span class="kw">use </span>core::convert::TryInto; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">pub fn </span>test_aes() { |
| test::run(<span class="macro">test_file!</span>(<span class="string">"aes_tests.txt"</span>), |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| <span class="kw">let </span>key = consume_key(test_case, <span class="string">"Key"</span>); |
| <span class="kw">let </span>input = test_case.consume_bytes(<span class="string">"Input"</span>); |
| <span class="kw">let </span>input: <span class="kw-2">&</span>[u8; BLOCK_LEN] = input.as_slice().try_into()<span class="question-mark">?</span>; |
| <span class="kw">let </span>expected_output = test_case.consume_bytes(<span class="string">"Output"</span>); |
| |
| <span class="kw">let </span>block = Block::from(input); |
| <span class="kw">let </span>output = key.encrypt_block(block); |
| <span class="macro">assert_eq!</span>(output.as_ref(), <span class="kw-2">&</span>expected_output[..]); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="kw">fn </span>consume_key(test_case: <span class="kw-2">&mut </span>test::TestCase, name: <span class="kw-2">&</span>str) -> Key { |
| <span class="kw">let </span>key = test_case.consume_bytes(name); |
| <span class="kw">let </span>variant = <span class="kw">match </span>key.len() { |
| <span class="number">16 </span>=> Variant::AES_128, |
| <span class="number">32 </span>=> Variant::AES_256, |
| <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(), |
| }; |
| Key::new(<span class="kw-2">&</span>key[..], variant, cpu::features()).unwrap() |
| } |
| } |
| </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> |
