| <!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/ec/suite_b/ops.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ops.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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| <span id="1098">1098</span> |
| <span id="1099">1099</span> |
| <span id="1100">1100</span> |
| <span id="1101">1101</span> |
| <span id="1102">1102</span> |
| <span id="1103">1103</span> |
| <span id="1104">1104</span> |
| <span id="1105">1105</span> |
| <span id="1106">1106</span> |
| <span id="1107">1107</span> |
| <span id="1108">1108</span> |
| <span id="1109">1109</span> |
| <span id="1110">1110</span> |
| <span id="1111">1111</span> |
| <span id="1112">1112</span> |
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| <span id="1121">1121</span> |
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| <span id="1128">1128</span> |
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| <span id="1143">1143</span> |
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| <span id="1177">1177</span> |
| <span id="1178">1178</span> |
| <span id="1179">1179</span> |
| <span id="1180">1180</span> |
| <span id="1181">1181</span> |
| </pre><pre class="rust"><code><span class="comment">// Copyright 2016 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 crate</span>::{arithmetic::montgomery::<span class="kw-2">*</span>, c, error, limb::<span class="kw-2">*</span>}; |
| <span class="kw">use </span>core::marker::PhantomData; |
| |
| <span class="kw">pub use </span><span class="self">self</span>::elem::<span class="kw-2">*</span>; |
| |
| <span class="doccomment">/// A field element, i.e. an element of ℤ/qℤ for the curve's field modulus |
| /// *q*. |
| </span><span class="kw">pub type </span>Elem<E> = elem::Elem<Q, E>; |
| |
| <span class="doccomment">/// Represents the (prime) order *q* of the curve's prime field. |
| </span><span class="attribute">#[derive(Clone, Copy)] |
| </span><span class="kw">pub enum </span>Q {} |
| |
| <span class="doccomment">/// A scalar. Its value is in [0, n). Zero-valued scalars are forbidden in most |
| /// contexts. |
| </span><span class="kw">pub type </span>Scalar<E = Unencoded> = elem::Elem<N, E>; |
| |
| <span class="doccomment">/// Represents the prime order *n* of the curve's group. |
| </span><span class="attribute">#[derive(Clone, Copy)] |
| </span><span class="kw">pub enum </span>N {} |
| |
| <span class="kw">pub struct </span>Point { |
| <span class="comment">// The coordinates are stored in a contiguous array, where the first |
| // `ops.num_limbs` elements are the X coordinate, the next |
| // `ops.num_limbs` elements are the Y coordinate, and the next |
| // `ops.num_limbs` elements are the Z coordinate. This layout is dictated |
| // by the requirements of the GFp_nistz256 code. |
| </span>xyz: [Limb; <span class="number">3 </span>* MAX_LIMBS], |
| } |
| |
| <span class="kw">impl </span>Point { |
| <span class="kw">pub fn </span>new_at_infinity() -> Point { |
| Point { |
| xyz: [<span class="number">0</span>; <span class="number">3 </span>* MAX_LIMBS], |
| } |
| } |
| } |
| |
| <span class="kw">static </span>ONE: Elem<Unencoded> = Elem { |
| limbs: <span class="macro">limbs!</span>[<span class="number">1</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>], |
| m: PhantomData, |
| encoding: PhantomData, |
| }; |
| |
| <span class="doccomment">/// Operations and values needed by all curve operations. |
| </span><span class="kw">pub struct </span>CommonOps { |
| <span class="kw">pub </span>num_limbs: usize, |
| q: Modulus, |
| <span class="kw">pub </span>n: Elem<Unencoded>, |
| |
| <span class="kw">pub </span>a: Elem<R>, <span class="comment">// Must be -3 mod q |
| </span><span class="kw">pub </span>b: Elem<R>, |
| |
| <span class="comment">// In all cases, `r`, `a`, and `b` may all alias each other. |
| </span>elem_add_impl: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, b: <span class="kw-2">*const </span>Limb), |
| elem_mul_mont: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, b: <span class="kw-2">*const </span>Limb), |
| elem_sqr_mont: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb), |
| |
| point_add_jacobian_impl: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, b: <span class="kw-2">*const </span>Limb), |
| } |
| |
| <span class="kw">impl </span>CommonOps { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_add<E: Encoding>(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&mut </span>Elem<E>, b: <span class="kw-2">&</span>Elem<E>) { |
| binary_op_assign(<span class="self">self</span>.elem_add_impl, a, b) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elems_are_equal(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<R>, b: <span class="kw-2">&</span>Elem<R>) -> LimbMask { |
| limbs_equal_limbs_consttime(<span class="kw-2">&</span>a.limbs[..<span class="self">self</span>.num_limbs], <span class="kw-2">&</span>b.limbs[..<span class="self">self</span>.num_limbs]) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_unencoded(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<R>) -> Elem<Unencoded> { |
| <span class="self">self</span>.elem_product(a, <span class="kw-2">&</span>ONE) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_mul(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&mut </span>Elem<R>, b: <span class="kw-2">&</span>Elem<R>) { |
| binary_op_assign(<span class="self">self</span>.elem_mul_mont, a, b) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_product<EA: Encoding, EB: Encoding>( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| a: <span class="kw-2">&</span>Elem<EA>, |
| b: <span class="kw-2">&</span>Elem<EB>, |
| ) -> Elem<<(EA, EB) <span class="kw">as </span>ProductEncoding>::Output> |
| <span class="kw">where |
| </span>(EA, EB): ProductEncoding, |
| { |
| mul_mont(<span class="self">self</span>.elem_mul_mont, a, b) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_square(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&mut </span>Elem<R>) { |
| unary_op_assign(<span class="self">self</span>.elem_sqr_mont, a); |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_squared(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<R>) -> Elem<R> { |
| unary_op(<span class="self">self</span>.elem_sqr_mont, a) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_zero<M, E: Encoding>(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>elem::Elem<M, E>) -> bool { |
| limbs_are_zero_constant_time(<span class="kw-2">&</span>a.limbs[..<span class="self">self</span>.num_limbs]) == LimbMask::True |
| } |
| |
| <span class="kw">pub fn </span>elem_verify_is_not_zero(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<R>) -> <span class="prelude-ty">Result</span><(), error::Unspecified> { |
| <span class="kw">if </span><span class="self">self</span>.is_zero(a) { |
| <span class="prelude-val">Err</span>(error::Unspecified) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">pub fn </span>point_sum(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Point, b: <span class="kw-2">&</span>Point) -> Point { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Point::new_at_infinity(); |
| <span class="kw">unsafe </span>{ |
| (<span class="self">self</span>.point_add_jacobian_impl)(r.xyz.as_mut_ptr(), a.xyz.as_ptr(), b.xyz.as_ptr()) |
| } |
| r |
| } |
| |
| <span class="kw">pub fn </span>point_x(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Point) -> Elem<R> { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Elem::zero(); |
| r.limbs[..<span class="self">self</span>.num_limbs].copy_from_slice(<span class="kw-2">&</span>p.xyz[<span class="number">0</span>..<span class="self">self</span>.num_limbs]); |
| r |
| } |
| |
| <span class="kw">pub fn </span>point_y(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Point) -> Elem<R> { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Elem::zero(); |
| r.limbs[..<span class="self">self</span>.num_limbs].copy_from_slice(<span class="kw-2">&</span>p.xyz[<span class="self">self</span>.num_limbs..(<span class="number">2 </span>* <span class="self">self</span>.num_limbs)]); |
| r |
| } |
| |
| <span class="kw">pub fn </span>point_z(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Point) -> Elem<R> { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Elem::zero(); |
| r.limbs[..<span class="self">self</span>.num_limbs] |
| .copy_from_slice(<span class="kw-2">&</span>p.xyz[(<span class="number">2 </span>* <span class="self">self</span>.num_limbs)..(<span class="number">3 </span>* <span class="self">self</span>.num_limbs)]); |
| r |
| } |
| } |
| |
| <span class="kw">struct </span>Modulus { |
| p: [Limb; MAX_LIMBS], |
| rr: [Limb; MAX_LIMBS], |
| } |
| |
| <span class="doccomment">/// Operations on private keys, for ECDH and ECDSA signing. |
| </span><span class="kw">pub struct </span>PrivateKeyOps { |
| <span class="kw">pub </span>common: <span class="kw-2">&</span><span class="lifetime">'static </span>CommonOps, |
| elem_inv_squared: <span class="kw">fn</span>(a: <span class="kw-2">&</span>Elem<R>) -> Elem<R>, |
| point_mul_base_impl: <span class="kw">fn</span>(a: <span class="kw-2">&</span>Scalar) -> Point, |
| point_mul_impl: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>( |
| r: <span class="kw-2">*mut </span>Limb, <span class="comment">// [3][num_limbs] |
| </span>p_scalar: <span class="kw-2">*const </span>Limb, <span class="comment">// [num_limbs] |
| </span>p_x: <span class="kw-2">*const </span>Limb, <span class="comment">// [num_limbs] |
| </span>p_y: <span class="kw-2">*const </span>Limb, <span class="comment">// [num_limbs] |
| </span>), |
| } |
| |
| <span class="kw">impl </span>PrivateKeyOps { |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>point_mul_base(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Scalar) -> Point { |
| (<span class="self">self</span>.point_mul_base_impl)(a) |
| } |
| |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>point_mul(<span class="kw-2">&</span><span class="self">self</span>, p_scalar: <span class="kw-2">&</span>Scalar, (p_x, p_y): <span class="kw-2">&</span>(Elem<R>, Elem<R>)) -> Point { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Point::new_at_infinity(); |
| <span class="kw">unsafe </span>{ |
| (<span class="self">self</span>.point_mul_impl)( |
| r.xyz.as_mut_ptr(), |
| p_scalar.limbs.as_ptr(), |
| p_x.limbs.as_ptr(), |
| p_y.limbs.as_ptr(), |
| ); |
| } |
| r |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_inverse_squared(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<R>) -> Elem<R> { |
| (<span class="self">self</span>.elem_inv_squared)(a) |
| } |
| } |
| |
| <span class="doccomment">/// Operations and values needed by all operations on public keys (ECDH |
| /// agreement and ECDSA verification). |
| </span><span class="kw">pub struct </span>PublicKeyOps { |
| <span class="kw">pub </span>common: <span class="kw-2">&</span><span class="lifetime">'static </span>CommonOps, |
| } |
| |
| <span class="kw">impl </span>PublicKeyOps { |
| <span class="comment">// The serialized bytes are in big-endian order, zero-padded. The limbs |
| // of `Elem` are in the native endianness, least significant limb to |
| // most significant limb. Besides the parsing, conversion, this also |
| // implements NIST SP 800-56A Step 2: "Verify that xQ and yQ are integers |
| // in the interval [0, p-1] in the case that q is an odd prime p[.]" |
| </span><span class="kw">pub fn </span>elem_parse(<span class="kw-2">&</span><span class="self">self</span>, input: <span class="kw-2">&mut </span>untrusted::Reader) -> <span class="prelude-ty">Result</span><Elem<R>, error::Unspecified> { |
| <span class="kw">let </span>encoded_value = input.read_bytes(<span class="self">self</span>.common.num_limbs * LIMB_BYTES)<span class="question-mark">?</span>; |
| <span class="kw">let </span>parsed = elem_parse_big_endian_fixed_consttime(<span class="self">self</span>.common, encoded_value)<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Elem::zero(); |
| <span class="comment">// Montgomery encode (elem_to_mont). |
| // TODO: do something about this. |
| </span><span class="kw">unsafe </span>{ |
| (<span class="self">self</span>.common.elem_mul_mont)( |
| r.limbs.as_mut_ptr(), |
| parsed.limbs.as_ptr(), |
| <span class="self">self</span>.common.q.rr.as_ptr(), |
| ) |
| } |
| <span class="prelude-val">Ok</span>(r) |
| } |
| } |
| |
| <span class="comment">// Operations used by both ECDSA signing and ECDSA verification. In general |
| // these must be side-channel resistant. |
| </span><span class="kw">pub struct </span>ScalarOps { |
| <span class="kw">pub </span>common: <span class="kw-2">&</span><span class="lifetime">'static </span>CommonOps, |
| |
| scalar_inv_to_mont_impl: <span class="kw">fn</span>(a: <span class="kw-2">&</span>Scalar) -> Scalar<R>, |
| scalar_mul_mont: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, b: <span class="kw-2">*const </span>Limb), |
| } |
| |
| <span class="kw">impl </span>ScalarOps { |
| <span class="comment">// The (maximum) length of a scalar, not including any padding. |
| </span><span class="kw">pub fn </span>scalar_bytes_len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.common.num_limbs * LIMB_BYTES |
| } |
| |
| <span class="doccomment">/// Returns the modular inverse of `a` (mod `n`). Panics of `a` is zero, |
| /// because zero isn't invertible. |
| </span><span class="kw">pub fn </span>scalar_inv_to_mont(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Scalar) -> Scalar<R> { |
| <span class="macro">assert!</span>(!<span class="self">self</span>.common.is_zero(a)); |
| (<span class="self">self</span>.scalar_inv_to_mont_impl)(a) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>scalar_product<EA: Encoding, EB: Encoding>( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| a: <span class="kw-2">&</span>Scalar<EA>, |
| b: <span class="kw-2">&</span>Scalar<EB>, |
| ) -> Scalar<<(EA, EB) <span class="kw">as </span>ProductEncoding>::Output> |
| <span class="kw">where |
| </span>(EA, EB): ProductEncoding, |
| { |
| mul_mont(<span class="self">self</span>.scalar_mul_mont, a, b) |
| } |
| } |
| |
| <span class="doccomment">/// Operations on public scalars needed by ECDSA signature verification. |
| </span><span class="kw">pub struct </span>PublicScalarOps { |
| <span class="kw">pub </span>scalar_ops: <span class="kw-2">&</span><span class="lifetime">'static </span>ScalarOps, |
| <span class="kw">pub </span>public_key_ops: <span class="kw-2">&</span><span class="lifetime">'static </span>PublicKeyOps, |
| |
| <span class="comment">// XXX: `PublicScalarOps` shouldn't depend on `PrivateKeyOps`, but it does |
| // temporarily until `twin_mul` is rewritten. |
| </span><span class="kw">pub </span>private_key_ops: <span class="kw-2">&</span><span class="lifetime">'static </span>PrivateKeyOps, |
| |
| <span class="kw">pub </span>q_minus_n: Elem<Unencoded>, |
| } |
| |
| <span class="kw">impl </span>PublicScalarOps { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>scalar_as_elem(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Scalar) -> Elem<Unencoded> { |
| Elem { |
| limbs: a.limbs, |
| m: PhantomData, |
| encoding: PhantomData, |
| } |
| } |
| |
| <span class="kw">pub fn </span>elem_equals(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<Unencoded>, b: <span class="kw-2">&</span>Elem<Unencoded>) -> bool { |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="self">self</span>.public_key_ops.common.num_limbs { |
| <span class="kw">if </span>a.limbs[i] != b.limbs[i] { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="kw">pub fn </span>elem_less_than(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<Unencoded>, b: <span class="kw-2">&</span>Elem<Unencoded>) -> bool { |
| <span class="kw">let </span>num_limbs = <span class="self">self</span>.public_key_ops.common.num_limbs; |
| limbs_less_than_limbs_vartime(<span class="kw-2">&</span>a.limbs[..num_limbs], <span class="kw-2">&</span>b.limbs[..num_limbs]) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_sum(<span class="kw-2">&</span><span class="self">self</span>, a: <span class="kw-2">&</span>Elem<Unencoded>, b: <span class="kw-2">&</span>Elem<Unencoded>) -> Elem<Unencoded> { |
| binary_op(<span class="self">self</span>.public_key_ops.common.elem_add_impl, a, b) |
| } |
| } |
| |
| <span class="attribute">#[allow(non_snake_case)] |
| </span><span class="kw">pub struct </span>PrivateScalarOps { |
| <span class="kw">pub </span>scalar_ops: <span class="kw-2">&</span><span class="lifetime">'static </span>ScalarOps, |
| |
| <span class="kw">pub </span>oneRR_mod_n: Scalar<RR>, <span class="comment">// 1 * R**2 (mod n). TOOD: Use One<RR>. |
| </span>} |
| |
| <span class="comment">// This assumes n < q < 2*n. |
| </span><span class="kw">pub fn </span>elem_reduced_to_scalar(ops: <span class="kw-2">&</span>CommonOps, elem: <span class="kw-2">&</span>Elem<Unencoded>) -> Scalar<Unencoded> { |
| <span class="kw">let </span>num_limbs = ops.num_limbs; |
| <span class="kw">let </span><span class="kw-2">mut </span>r_limbs = elem.limbs; |
| limbs_reduce_once_constant_time(<span class="kw-2">&mut </span>r_limbs[..num_limbs], <span class="kw-2">&</span>ops.n.limbs[..num_limbs]); |
| Scalar { |
| limbs: r_limbs, |
| m: PhantomData, |
| encoding: PhantomData, |
| } |
| } |
| |
| <span class="kw">pub fn </span>scalar_sum(ops: <span class="kw-2">&</span>CommonOps, a: <span class="kw-2">&</span>Scalar, b: <span class="kw-2">&</span>Scalar) -> Scalar { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Scalar::zero(); |
| <span class="kw">unsafe </span>{ |
| LIMBS_add_mod( |
| r.limbs.as_mut_ptr(), |
| a.limbs.as_ptr(), |
| b.limbs.as_ptr(), |
| ops.n.limbs.as_ptr(), |
| ops.num_limbs, |
| ) |
| } |
| r |
| } |
| |
| <span class="comment">// Returns (`a` squared `squarings` times) * `b`. |
| </span><span class="kw">fn </span>elem_sqr_mul(ops: <span class="kw-2">&</span>CommonOps, a: <span class="kw-2">&</span>Elem<R>, squarings: usize, b: <span class="kw-2">&</span>Elem<R>) -> Elem<R> { |
| <span class="macro">debug_assert!</span>(squarings >= <span class="number">1</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>tmp = ops.elem_squared(a); |
| <span class="kw">for _ in </span><span class="number">1</span>..squarings { |
| ops.elem_square(<span class="kw-2">&mut </span>tmp); |
| } |
| ops.elem_product(<span class="kw-2">&</span>tmp, b) |
| } |
| |
| <span class="comment">// Sets `acc` = (`acc` squared `squarings` times) * `b`. |
| </span><span class="kw">fn </span>elem_sqr_mul_acc(ops: <span class="kw-2">&</span>CommonOps, acc: <span class="kw-2">&mut </span>Elem<R>, squarings: usize, b: <span class="kw-2">&</span>Elem<R>) { |
| <span class="macro">debug_assert!</span>(squarings >= <span class="number">1</span>); |
| <span class="kw">for _ in </span><span class="number">0</span>..squarings { |
| ops.elem_square(acc); |
| } |
| ops.elem_mul(acc, b) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>elem_parse_big_endian_fixed_consttime( |
| ops: <span class="kw-2">&</span>CommonOps, |
| bytes: untrusted::Input, |
| ) -> <span class="prelude-ty">Result</span><Elem<Unencoded>, error::Unspecified> { |
| parse_big_endian_fixed_consttime(ops, bytes, AllowZero::Yes, <span class="kw-2">&</span>ops.q.p[..ops.num_limbs]) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>scalar_parse_big_endian_fixed_consttime( |
| ops: <span class="kw-2">&</span>CommonOps, |
| bytes: untrusted::Input, |
| ) -> <span class="prelude-ty">Result</span><Scalar, error::Unspecified> { |
| parse_big_endian_fixed_consttime(ops, bytes, AllowZero::No, <span class="kw-2">&</span>ops.n.limbs[..ops.num_limbs]) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>scalar_parse_big_endian_variable( |
| ops: <span class="kw-2">&</span>CommonOps, |
| allow_zero: AllowZero, |
| bytes: untrusted::Input, |
| ) -> <span class="prelude-ty">Result</span><Scalar, error::Unspecified> { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Scalar::zero(); |
| parse_big_endian_in_range_and_pad_consttime( |
| bytes, |
| allow_zero, |
| <span class="kw-2">&</span>ops.n.limbs[..ops.num_limbs], |
| <span class="kw-2">&mut </span>r.limbs[..ops.num_limbs], |
| )<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(r) |
| } |
| |
| <span class="kw">pub fn </span>scalar_parse_big_endian_partially_reduced_variable_consttime( |
| ops: <span class="kw-2">&</span>CommonOps, |
| allow_zero: AllowZero, |
| bytes: untrusted::Input, |
| ) -> <span class="prelude-ty">Result</span><Scalar, error::Unspecified> { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Scalar::zero(); |
| parse_big_endian_in_range_partially_reduced_and_pad_consttime( |
| bytes, |
| allow_zero, |
| <span class="kw-2">&</span>ops.n.limbs[..ops.num_limbs], |
| <span class="kw-2">&mut </span>r.limbs[..ops.num_limbs], |
| )<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(r) |
| } |
| |
| <span class="kw">fn </span>parse_big_endian_fixed_consttime<M>( |
| ops: <span class="kw-2">&</span>CommonOps, |
| bytes: untrusted::Input, |
| allow_zero: AllowZero, |
| max_exclusive: <span class="kw-2">&</span>[Limb], |
| ) -> <span class="prelude-ty">Result</span><elem::Elem<M, Unencoded>, error::Unspecified> { |
| <span class="kw">if </span>bytes.len() != ops.num_limbs * LIMB_BYTES { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(error::Unspecified); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>r = elem::Elem::zero(); |
| parse_big_endian_in_range_and_pad_consttime( |
| bytes, |
| allow_zero, |
| max_exclusive, |
| <span class="kw-2">&mut </span>r.limbs[..ops.num_limbs], |
| )<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(r) |
| } |
| |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>LIMBS_add_mod( |
| r: <span class="kw-2">*mut </span>Limb, |
| a: <span class="kw-2">*const </span>Limb, |
| b: <span class="kw-2">*const </span>Limb, |
| m: <span class="kw-2">*const </span>Limb, |
| num_limbs: c::size_t, |
| ); |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::test; |
| <span class="kw">use </span>alloc::{format, vec, vec::Vec}; |
| |
| <span class="kw">const </span>ZERO_SCALAR: Scalar = Scalar { |
| limbs: [<span class="number">0</span>; MAX_LIMBS], |
| m: PhantomData, |
| encoding: PhantomData, |
| }; |
| |
| <span class="kw">fn </span>q_minus_n_plus_n_equals_0_test(ops: <span class="kw-2">&</span>PublicScalarOps) { |
| <span class="kw">let </span>cops = ops.scalar_ops.common; |
| <span class="kw">let </span><span class="kw-2">mut </span>x = ops.q_minus_n; |
| cops.elem_add(<span class="kw-2">&mut </span>x, <span class="kw-2">&</span>cops.n); |
| <span class="macro">assert!</span>(cops.is_zero(<span class="kw-2">&</span>x)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_q_minus_n_plus_n_equals_0_test() { |
| q_minus_n_plus_n_equals_0_test(<span class="kw-2">&</span>p256::PUBLIC_SCALAR_OPS); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_q_minus_n_plus_n_equals_0_test() { |
| q_minus_n_plus_n_equals_0_test(<span class="kw-2">&</span>p384::PUBLIC_SCALAR_OPS); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_elem_add_test() { |
| elem_add_test( |
| <span class="kw-2">&</span>p256::PUBLIC_SCALAR_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_elem_sum_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_elem_add_test() { |
| elem_add_test( |
| <span class="kw-2">&</span>p384::PUBLIC_SCALAR_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_elem_sum_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>elem_add_test(ops: <span class="kw-2">&</span>PublicScalarOps, test_file: test::File) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span>cops = ops.public_key_ops.common; |
| <span class="kw">let </span>a = consume_elem(cops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>b = consume_elem(cops, test_case, <span class="string">"b"</span>); |
| <span class="kw">let </span>expected_sum = consume_elem(cops, test_case, <span class="string">"r"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_sum = a; |
| ops.public_key_ops.common.elem_add(<span class="kw-2">&mut </span>actual_sum, <span class="kw-2">&</span>b); |
| assert_limbs_are_equal(cops, <span class="kw-2">&</span>actual_sum.limbs, <span class="kw-2">&</span>expected_sum.limbs); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_sum = b; |
| ops.public_key_ops.common.elem_add(<span class="kw-2">&mut </span>actual_sum, <span class="kw-2">&</span>a); |
| assert_limbs_are_equal(cops, <span class="kw-2">&</span>actual_sum.limbs, <span class="kw-2">&</span>expected_sum.limbs); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="comment">// XXX: There's no `GFp_nistz256_sub` in *ring*; it's logic is inlined into |
| // the point arithmetic functions. Thus, we can't test it. |
| |
| </span><span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_elem_sub_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_p384_elem_sub(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, b: <span class="kw-2">*const </span>Limb); |
| } |
| elem_sub_test( |
| <span class="kw-2">&</span>p384::COMMON_OPS, |
| GFp_p384_elem_sub, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_elem_sum_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>elem_sub_test( |
| ops: <span class="kw-2">&</span>CommonOps, |
| elem_sub: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, b: <span class="kw-2">*const </span>Limb), |
| test_file: test::File, |
| ) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span>a = consume_elem(ops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>b = consume_elem(ops, test_case, <span class="string">"b"</span>); |
| <span class="kw">let </span>r = consume_elem(ops, test_case, <span class="string">"r"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_difference = Elem::<R>::zero(); |
| <span class="kw">unsafe </span>{ |
| elem_sub( |
| actual_difference.limbs.as_mut_ptr(), |
| r.limbs.as_ptr(), |
| b.limbs.as_ptr(), |
| ); |
| } |
| assert_limbs_are_equal(ops, <span class="kw-2">&</span>actual_difference.limbs, <span class="kw-2">&</span>a.limbs); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_difference = Elem::<R>::zero(); |
| <span class="kw">unsafe </span>{ |
| elem_sub( |
| actual_difference.limbs.as_mut_ptr(), |
| r.limbs.as_ptr(), |
| a.limbs.as_ptr(), |
| ); |
| } |
| assert_limbs_are_equal(ops, <span class="kw-2">&</span>actual_difference.limbs, <span class="kw-2">&</span>b.limbs); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="comment">// XXX: There's no `GFp_nistz256_div_by_2` in *ring*; it's logic is inlined |
| // into the point arithmetic functions. Thus, we can't test it. |
| |
| </span><span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_elem_div_by_2_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_p384_elem_div_by_2(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb); |
| } |
| elem_div_by_2_test( |
| <span class="kw-2">&</span>p384::COMMON_OPS, |
| GFp_p384_elem_div_by_2, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_elem_div_by_2_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>elem_div_by_2_test( |
| ops: <span class="kw-2">&</span>CommonOps, |
| elem_div_by_2: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb), |
| test_file: test::File, |
| ) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span>a = consume_elem(ops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>r = consume_elem(ops, test_case, <span class="string">"r"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_result = Elem::<R>::zero(); |
| <span class="kw">unsafe </span>{ |
| elem_div_by_2(actual_result.limbs.as_mut_ptr(), a.limbs.as_ptr()); |
| } |
| assert_limbs_are_equal(ops, <span class="kw-2">&</span>actual_result.limbs, <span class="kw-2">&</span>r.limbs); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="comment">// TODO: Add test vectors that test the range of values above `q`. |
| </span><span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_elem_neg_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_nistz256_neg(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb); |
| } |
| elem_neg_test( |
| <span class="kw-2">&</span>p256::COMMON_OPS, |
| GFp_nistz256_neg, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_elem_neg_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_elem_neg_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_p384_elem_neg(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb); |
| } |
| elem_neg_test( |
| <span class="kw-2">&</span>p384::COMMON_OPS, |
| GFp_p384_elem_neg, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_elem_neg_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>elem_neg_test( |
| ops: <span class="kw-2">&</span>CommonOps, |
| elem_neg: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb), |
| test_file: test::File, |
| ) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span>a = consume_elem(ops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>b = consume_elem(ops, test_case, <span class="string">"b"</span>); |
| |
| <span class="comment">// Verify -a == b. |
| </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_result = Elem::<R>::zero(); |
| <span class="kw">unsafe </span>{ |
| elem_neg(actual_result.limbs.as_mut_ptr(), a.limbs.as_ptr()); |
| } |
| assert_limbs_are_equal(ops, <span class="kw-2">&</span>actual_result.limbs, <span class="kw-2">&</span>b.limbs); |
| } |
| |
| <span class="comment">// Verify -b == a. |
| </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_result = Elem::<R>::zero(); |
| <span class="kw">unsafe </span>{ |
| elem_neg(actual_result.limbs.as_mut_ptr(), b.limbs.as_ptr()); |
| } |
| assert_limbs_are_equal(ops, <span class="kw-2">&</span>actual_result.limbs, <span class="kw-2">&</span>a.limbs); |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_elem_mul_test() { |
| elem_mul_test(<span class="kw-2">&</span>p256::COMMON_OPS, <span class="macro">test_file!</span>(<span class="string">"ops/p256_elem_mul_tests.txt"</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_elem_mul_test() { |
| elem_mul_test(<span class="kw-2">&</span>p384::COMMON_OPS, <span class="macro">test_file!</span>(<span class="string">"ops/p384_elem_mul_tests.txt"</span>)); |
| } |
| |
| <span class="kw">fn </span>elem_mul_test(ops: <span class="kw-2">&</span>CommonOps, test_file: test::File) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>a = consume_elem(ops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>b = consume_elem(ops, test_case, <span class="string">"b"</span>); |
| <span class="kw">let </span>r = consume_elem(ops, test_case, <span class="string">"r"</span>); |
| ops.elem_mul(<span class="kw-2">&mut </span>a, <span class="kw-2">&</span>b); |
| assert_limbs_are_equal(ops, <span class="kw-2">&</span>a.limbs, <span class="kw-2">&</span>r.limbs); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_scalar_mul_test() { |
| scalar_mul_test( |
| <span class="kw-2">&</span>p256::SCALAR_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_scalar_mul_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_scalar_mul_test() { |
| scalar_mul_test( |
| <span class="kw-2">&</span>p384::SCALAR_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_scalar_mul_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>scalar_mul_test(ops: <span class="kw-2">&</span>ScalarOps, test_file: test::File) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| <span class="kw">let </span>cops = ops.common; |
| <span class="kw">let </span>a = consume_scalar(cops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>b = consume_scalar_mont(cops, test_case, <span class="string">"b"</span>); |
| <span class="kw">let </span>expected_result = consume_scalar(cops, test_case, <span class="string">"r"</span>); |
| <span class="kw">let </span>actual_result = ops.scalar_product(<span class="kw-2">&</span>a, <span class="kw-2">&</span>b); |
| assert_limbs_are_equal(cops, <span class="kw-2">&</span>actual_result.limbs, <span class="kw-2">&</span>expected_result.limbs); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_scalar_square_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_p256_scalar_sqr_rep_mont(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, rep: Limb); |
| } |
| scalar_square_test( |
| <span class="kw-2">&</span>p256::SCALAR_OPS, |
| GFp_p256_scalar_sqr_rep_mont, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_scalar_square_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="comment">// XXX: There's no `p384_scalar_square_test()` because there's no dedicated |
| // `GFp_p384_scalar_sqr_rep_mont()`. |
| |
| </span><span class="kw">fn </span>scalar_square_test( |
| ops: <span class="kw-2">&</span>ScalarOps, |
| sqr_rep: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>(r: <span class="kw-2">*mut </span>Limb, a: <span class="kw-2">*const </span>Limb, rep: Limb), |
| test_file: test::File, |
| ) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| <span class="kw">let </span>cops = <span class="kw-2">&</span>ops.common; |
| <span class="kw">let </span>a = consume_scalar(cops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>expected_result = consume_scalar(cops, test_case, <span class="string">"r"</span>); |
| |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_result: Scalar<R> = Scalar { |
| limbs: [<span class="number">0</span>; MAX_LIMBS], |
| m: PhantomData, |
| encoding: PhantomData, |
| }; |
| <span class="kw">unsafe </span>{ |
| sqr_rep(actual_result.limbs.as_mut_ptr(), a.limbs.as_ptr(), <span class="number">1</span>); |
| } |
| assert_limbs_are_equal(cops, <span class="kw-2">&</span>actual_result.limbs, <span class="kw-2">&</span>expected_result.limbs); |
| } |
| |
| { |
| <span class="kw">let </span>actual_result = ops.scalar_product(<span class="kw-2">&</span>a, <span class="kw-2">&</span>a); |
| assert_limbs_are_equal(cops, <span class="kw-2">&</span>actual_result.limbs, <span class="kw-2">&</span>expected_result.limbs); |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="attribute">#[test] |
| #[should_panic(expected = <span class="string">"!self.common.is_zero(a)"</span>)] |
| </span><span class="kw">fn </span>p256_scalar_inv_to_mont_zero_panic_test() { |
| <span class="kw">let _ </span>= p256::SCALAR_OPS.scalar_inv_to_mont(<span class="kw-2">&</span>ZERO_SCALAR); |
| } |
| |
| <span class="attribute">#[test] |
| #[should_panic(expected = <span class="string">"!self.common.is_zero(a)"</span>)] |
| </span><span class="kw">fn </span>p384_scalar_inv_to_mont_zero_panic_test() { |
| <span class="kw">let _ </span>= p384::SCALAR_OPS.scalar_inv_to_mont(<span class="kw-2">&</span>ZERO_SCALAR); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_point_sum_test() { |
| point_sum_test( |
| <span class="kw-2">&</span>p256::PRIVATE_KEY_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_point_sum_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_point_sum_test() { |
| point_sum_test( |
| <span class="kw-2">&</span>p384::PRIVATE_KEY_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_point_sum_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>point_sum_test(ops: <span class="kw-2">&</span>PrivateKeyOps, test_file: test::File) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span>a = consume_jacobian_point(ops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>b = consume_jacobian_point(ops, test_case, <span class="string">"b"</span>); |
| <span class="kw">let </span>r_expected = consume_point(ops, test_case, <span class="string">"r"</span>); |
| |
| <span class="kw">let </span>r_actual = ops.common.point_sum(<span class="kw-2">&</span>a, <span class="kw-2">&</span>b); |
| assert_point_actual_equals_expected(ops, <span class="kw-2">&</span>r_actual, <span class="kw-2">&</span>r_expected); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }); |
| } |
| |
| <span class="comment">// Keep this in sync with the logic for defining `GFp_USE_LARGE_TABLE` and |
| // with the corresponding code in p256.rs that decides which base point |
| // multiplication to use. |
| </span><span class="attribute">#[cfg(any(target_arch = <span class="string">"aarch64"</span>, target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>))] |
| #[test] |
| </span><span class="kw">fn </span>p256_point_sum_mixed_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_nistz256_point_add_affine( |
| r: <span class="kw-2">*mut </span>Limb, <span class="comment">// [p256::COMMON_OPS.num_limbs*3] |
| </span>a: <span class="kw-2">*const </span>Limb, <span class="comment">// [p256::COMMON_OPS.num_limbs*3] |
| </span>b: <span class="kw-2">*const </span>Limb, <span class="comment">// [p256::COMMON_OPS.num_limbs*2] |
| </span>); |
| } |
| point_sum_mixed_test( |
| <span class="kw-2">&</span>p256::PRIVATE_KEY_OPS, |
| GFp_nistz256_point_add_affine, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_point_sum_mixed_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="comment">// XXX: There is no `GFp_nistz384_point_add_affine()`. |
| |
| </span><span class="attribute">#[cfg(any(target_arch = <span class="string">"aarch64"</span>, target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>))] |
| </span><span class="kw">fn </span>point_sum_mixed_test( |
| ops: <span class="kw-2">&</span>PrivateKeyOps, |
| point_add_affine: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>( |
| r: <span class="kw-2">*mut </span>Limb, <span class="comment">// [ops.num_limbs*3] |
| </span>a: <span class="kw-2">*const </span>Limb, <span class="comment">// [ops.num_limbs*3] |
| </span>b: <span class="kw-2">*const </span>Limb, <span class="comment">// [ops.num_limbs*2] |
| </span>), |
| test_file: test::File, |
| ) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span>a = consume_jacobian_point(ops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>b = consume_affine_point(ops, test_case, <span class="string">"b"</span>); |
| <span class="kw">let </span>r_expected = consume_point(ops, test_case, <span class="string">"r"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>r_actual = Point::new_at_infinity(); |
| <span class="kw">unsafe </span>{ |
| point_add_affine(r_actual.xyz.as_mut_ptr(), a.xyz.as_ptr(), b.xy.as_ptr()); |
| } |
| |
| assert_point_actual_equals_expected(ops, <span class="kw-2">&</span>r_actual, <span class="kw-2">&</span>r_expected); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_point_double_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_nistz256_point_double( |
| r: <span class="kw-2">*mut </span>Limb, <span class="comment">// [p256::COMMON_OPS.num_limbs*3] |
| </span>a: <span class="kw-2">*const </span>Limb, <span class="comment">// [p256::COMMON_OPS.num_limbs*3] |
| </span>); |
| } |
| point_double_test( |
| <span class="kw-2">&</span>p256::PRIVATE_KEY_OPS, |
| GFp_nistz256_point_double, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_point_double_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_point_double_test() { |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="kw">fn </span>GFp_nistz384_point_double( |
| r: <span class="kw-2">*mut </span>Limb, <span class="comment">// [p384::COMMON_OPS.num_limbs*3] |
| </span>a: <span class="kw-2">*const </span>Limb, <span class="comment">// [p384::COMMON_OPS.num_limbs*3] |
| </span>); |
| } |
| point_double_test( |
| <span class="kw-2">&</span>p384::PRIVATE_KEY_OPS, |
| GFp_nistz384_point_double, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_point_double_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>point_double_test( |
| ops: <span class="kw-2">&</span>PrivateKeyOps, |
| point_double: <span class="kw">unsafe extern </span><span class="string">"C" </span><span class="kw">fn</span>( |
| r: <span class="kw-2">*mut </span>Limb, <span class="comment">// [ops.num_limbs*3] |
| </span>a: <span class="kw-2">*const </span>Limb, <span class="comment">// [ops.num_limbs*3] |
| </span>), |
| test_file: test::File, |
| ) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| |
| <span class="kw">let </span>a = consume_jacobian_point(ops, test_case, <span class="string">"a"</span>); |
| <span class="kw">let </span>r_expected = consume_point(ops, test_case, <span class="string">"r"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>r_actual = Point::new_at_infinity(); |
| <span class="kw">unsafe </span>{ |
| point_double(r_actual.xyz.as_mut_ptr(), a.xyz.as_ptr()); |
| } |
| |
| assert_point_actual_equals_expected(ops, <span class="kw-2">&</span>r_actual, <span class="kw-2">&</span>r_expected); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_point_mul_test() { |
| point_mul_tests( |
| <span class="kw-2">&</span>p256::PRIVATE_KEY_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_point_mul_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_point_mul_test() { |
| point_mul_tests( |
| <span class="kw-2">&</span>p384::PRIVATE_KEY_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_point_mul_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>point_mul_tests(ops: <span class="kw-2">&</span>PrivateKeyOps, test_file: test::File) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| <span class="kw">let </span>p_scalar = consume_scalar(ops.common, test_case, <span class="string">"p_scalar"</span>); |
| <span class="kw">let </span>(x, y) = <span class="kw">match </span>consume_point(ops, test_case, <span class="string">"p"</span>) { |
| TestPoint::Infinity => { |
| <span class="macro">panic!</span>(<span class="string">"can't be inf."</span>); |
| } |
| TestPoint::Affine(x, y) => (x, y), |
| }; |
| <span class="kw">let </span>expected_result = consume_point(ops, test_case, <span class="string">"r"</span>); |
| <span class="kw">let </span>actual_result = ops.point_mul(<span class="kw-2">&</span>p_scalar, <span class="kw-2">&</span>(x, y)); |
| assert_point_actual_equals_expected(ops, <span class="kw-2">&</span>actual_result, <span class="kw-2">&</span>expected_result); |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_point_mul_serialized_test() { |
| point_mul_serialized_test( |
| <span class="kw-2">&</span>p256::PRIVATE_KEY_OPS, |
| <span class="kw-2">&</span>p256::PUBLIC_KEY_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_point_mul_serialized_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>point_mul_serialized_test( |
| priv_ops: <span class="kw-2">&</span>PrivateKeyOps, |
| pub_ops: <span class="kw-2">&</span>PublicKeyOps, |
| test_file: test::File, |
| ) { |
| <span class="kw">let </span>cops = pub_ops.common; |
| |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| <span class="kw">let </span>p_scalar = consume_scalar(cops, test_case, <span class="string">"p_scalar"</span>); |
| |
| <span class="kw">let </span>p = test_case.consume_bytes(<span class="string">"p"</span>); |
| <span class="kw">let </span>p = <span class="kw">super</span>::<span class="kw">super</span>::public_key::parse_uncompressed_point( |
| pub_ops, |
| untrusted::Input::from(<span class="kw-2">&</span>p), |
| ) |
| .expect(<span class="string">"valid point"</span>); |
| |
| <span class="kw">let </span>expected_result = test_case.consume_bytes(<span class="string">"r"</span>); |
| |
| <span class="kw">let </span>product = priv_ops.point_mul(<span class="kw-2">&</span>p_scalar, <span class="kw-2">&</span>p); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>actual_result = <span class="macro">vec!</span>[<span class="number">4u8</span>; <span class="number">1 </span>+ (<span class="number">2 </span>* (cops.num_limbs * LIMB_BYTES))]; |
| { |
| <span class="kw">let </span>(x, y) = actual_result[<span class="number">1</span>..].split_at_mut(cops.num_limbs * LIMB_BYTES); |
| <span class="kw">super</span>::<span class="kw">super</span>::private_key::big_endian_affine_from_jacobian( |
| priv_ops, |
| <span class="prelude-val">Some</span>(x), |
| <span class="prelude-val">Some</span>(y), |
| <span class="kw-2">&</span>product, |
| ) |
| .expect(<span class="string">"successful encoding"</span>); |
| } |
| |
| <span class="macro">assert_eq!</span>(expected_result, actual_result); |
| |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p256_point_mul_base_test() { |
| point_mul_base_tests( |
| <span class="kw-2">&</span>p256::PRIVATE_KEY_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p256_point_mul_base_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>p384_point_mul_base_test() { |
| point_mul_base_tests( |
| <span class="kw-2">&</span>p384::PRIVATE_KEY_OPS, |
| <span class="macro">test_file!</span>(<span class="string">"ops/p384_point_mul_base_tests.txt"</span>), |
| ); |
| } |
| |
| <span class="kw">fn </span>point_mul_base_tests(ops: <span class="kw-2">&</span>PrivateKeyOps, test_file: test::File) { |
| test::run(test_file, |section, test_case| { |
| <span class="macro">assert_eq!</span>(section, <span class="string">""</span>); |
| <span class="kw">let </span>g_scalar = consume_scalar(ops.common, test_case, <span class="string">"g_scalar"</span>); |
| <span class="kw">let </span>expected_result = consume_point(ops, test_case, <span class="string">"r"</span>); |
| <span class="kw">let </span>actual_result = ops.point_mul_base(<span class="kw-2">&</span>g_scalar); |
| assert_point_actual_equals_expected(ops, <span class="kw-2">&</span>actual_result, <span class="kw-2">&</span>expected_result); |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="kw">fn </span>assert_point_actual_equals_expected( |
| ops: <span class="kw-2">&</span>PrivateKeyOps, |
| actual_point: <span class="kw-2">&</span>Point, |
| expected_point: <span class="kw-2">&</span>TestPoint, |
| ) { |
| <span class="kw">let </span>cops = ops.common; |
| <span class="kw">let </span>actual_x = <span class="kw-2">&</span>cops.point_x(<span class="kw-2">&</span>actual_point); |
| <span class="kw">let </span>actual_y = <span class="kw-2">&</span>cops.point_y(<span class="kw-2">&</span>actual_point); |
| <span class="kw">let </span>actual_z = <span class="kw-2">&</span>cops.point_z(<span class="kw-2">&</span>actual_point); |
| <span class="kw">match </span>expected_point { |
| TestPoint::Infinity => { |
| <span class="kw">let </span>zero = Elem::zero(); |
| assert_elems_are_equal(cops, <span class="kw-2">&</span>actual_z, <span class="kw-2">&</span>zero); |
| } |
| TestPoint::Affine(expected_x, expected_y) => { |
| <span class="kw">let </span>zz_inv = ops.elem_inverse_squared(<span class="kw-2">&</span>actual_z); |
| <span class="kw">let </span>x_aff = cops.elem_product(<span class="kw-2">&</span>actual_x, <span class="kw-2">&</span>zz_inv); |
| <span class="kw">let </span>y_aff = { |
| <span class="kw">let </span>zzzz_inv = cops.elem_squared(<span class="kw-2">&</span>zz_inv); |
| <span class="kw">let </span>zzz_inv = cops.elem_product(<span class="kw-2">&</span>actual_z, <span class="kw-2">&</span>zzzz_inv); |
| cops.elem_product(<span class="kw-2">&</span>actual_y, <span class="kw-2">&</span>zzz_inv) |
| }; |
| |
| assert_elems_are_equal(cops, <span class="kw-2">&</span>x_aff, <span class="kw-2">&</span>expected_x); |
| assert_elems_are_equal(cops, <span class="kw-2">&</span>y_aff, <span class="kw-2">&</span>expected_y); |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>consume_jacobian_point( |
| ops: <span class="kw-2">&</span>PrivateKeyOps, |
| test_case: <span class="kw-2">&mut </span>test::TestCase, |
| name: <span class="kw-2">&</span>str, |
| ) -> Point { |
| <span class="kw">let </span>input = test_case.consume_string(name); |
| <span class="kw">let </span>elems = input.split(<span class="string">", "</span>).collect::<Vec<<span class="kw-2">&</span>str>>(); |
| <span class="macro">assert_eq!</span>(elems.len(), <span class="number">3</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>p = Point::new_at_infinity(); |
| consume_point_elem(ops.common, <span class="kw-2">&mut </span>p.xyz, <span class="kw-2">&</span>elems, <span class="number">0</span>); |
| consume_point_elem(ops.common, <span class="kw-2">&mut </span>p.xyz, <span class="kw-2">&</span>elems, <span class="number">1</span>); |
| consume_point_elem(ops.common, <span class="kw-2">&mut </span>p.xyz, <span class="kw-2">&</span>elems, <span class="number">2</span>); |
| p |
| } |
| |
| <span class="attribute">#[cfg(any(target_arch = <span class="string">"aarch64"</span>, target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>))] |
| </span><span class="kw">struct </span>AffinePoint { |
| xy: [Limb; <span class="number">2 </span>* MAX_LIMBS], |
| } |
| |
| <span class="attribute">#[cfg(any(target_arch = <span class="string">"aarch64"</span>, target_arch = <span class="string">"x86"</span>, target_arch = <span class="string">"x86_64"</span>))] |
| </span><span class="kw">fn </span>consume_affine_point( |
| ops: <span class="kw-2">&</span>PrivateKeyOps, |
| test_case: <span class="kw-2">&mut </span>test::TestCase, |
| name: <span class="kw-2">&</span>str, |
| ) -> AffinePoint { |
| <span class="kw">let </span>input = test_case.consume_string(name); |
| <span class="kw">let </span>elems = input.split(<span class="string">", "</span>).collect::<Vec<<span class="kw-2">&</span>str>>(); |
| <span class="macro">assert_eq!</span>(elems.len(), <span class="number">2</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>p = AffinePoint { |
| xy: [<span class="number">0</span>; <span class="number">2 </span>* MAX_LIMBS], |
| }; |
| consume_point_elem(ops.common, <span class="kw-2">&mut </span>p.xy, <span class="kw-2">&</span>elems, <span class="number">0</span>); |
| consume_point_elem(ops.common, <span class="kw-2">&mut </span>p.xy, <span class="kw-2">&</span>elems, <span class="number">1</span>); |
| p |
| } |
| |
| <span class="kw">fn </span>consume_point_elem(ops: <span class="kw-2">&</span>CommonOps, limbs_out: <span class="kw-2">&mut </span>[Limb], elems: <span class="kw-2">&</span>[<span class="kw-2">&</span>str], i: usize) { |
| <span class="kw">let </span>bytes = test::from_hex(elems[i]).unwrap(); |
| <span class="kw">let </span>bytes = untrusted::Input::from(<span class="kw-2">&</span>bytes); |
| <span class="kw">let </span>r: Elem<Unencoded> = elem_parse_big_endian_fixed_consttime(ops, bytes).unwrap(); |
| <span class="comment">// XXX: “Transmute” this to `Elem<R>` limbs. |
| </span>limbs_out[(i * ops.num_limbs)..((i + <span class="number">1</span>) * ops.num_limbs)] |
| .copy_from_slice(<span class="kw-2">&</span>r.limbs[..ops.num_limbs]); |
| } |
| |
| <span class="kw">enum </span>TestPoint { |
| Infinity, |
| Affine(Elem<R>, Elem<R>), |
| } |
| |
| <span class="kw">fn </span>consume_point(ops: <span class="kw-2">&</span>PrivateKeyOps, test_case: <span class="kw-2">&mut </span>test::TestCase, name: <span class="kw-2">&</span>str) -> TestPoint { |
| <span class="kw">fn </span>consume_point_elem(ops: <span class="kw-2">&</span>CommonOps, elems: <span class="kw-2">&</span>[<span class="kw-2">&</span>str], i: usize) -> Elem<R> { |
| <span class="kw">let </span>bytes = test::from_hex(elems[i]).unwrap(); |
| <span class="kw">let </span>bytes = untrusted::Input::from(<span class="kw-2">&</span>bytes); |
| <span class="kw">let </span>unencoded: Elem<Unencoded> = |
| elem_parse_big_endian_fixed_consttime(ops, bytes).unwrap(); |
| <span class="comment">// XXX: “Transmute” this to `Elem<R>` limbs. |
| </span>Elem { |
| limbs: unencoded.limbs, |
| m: PhantomData, |
| encoding: PhantomData, |
| } |
| } |
| |
| <span class="kw">let </span>input = test_case.consume_string(name); |
| <span class="kw">if </span>input == <span class="string">"inf" </span>{ |
| <span class="kw">return </span>TestPoint::Infinity; |
| } |
| <span class="kw">let </span>elems = input.split(<span class="string">", "</span>).collect::<Vec<<span class="kw-2">&</span>str>>(); |
| <span class="macro">assert_eq!</span>(elems.len(), <span class="number">2</span>); |
| <span class="kw">let </span>x = consume_point_elem(ops.common, <span class="kw-2">&</span>elems, <span class="number">0</span>); |
| <span class="kw">let </span>y = consume_point_elem(ops.common, <span class="kw-2">&</span>elems, <span class="number">1</span>); |
| TestPoint::Affine(x, y) |
| } |
| |
| <span class="kw">fn </span>assert_elems_are_equal(ops: <span class="kw-2">&</span>CommonOps, a: <span class="kw-2">&</span>Elem<R>, b: <span class="kw-2">&</span>Elem<R>) { |
| assert_limbs_are_equal(ops, <span class="kw-2">&</span>a.limbs, <span class="kw-2">&</span>b.limbs) |
| } |
| |
| <span class="kw">fn </span>assert_limbs_are_equal( |
| ops: <span class="kw-2">&</span>CommonOps, |
| actual: <span class="kw-2">&</span>[Limb; MAX_LIMBS], |
| expected: <span class="kw-2">&</span>[Limb; MAX_LIMBS], |
| ) { |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..ops.num_limbs { |
| <span class="kw">if </span>actual[i] != expected[i] { |
| <span class="kw">let </span><span class="kw-2">mut </span>s = alloc::string::String::new(); |
| <span class="kw">for </span>j <span class="kw">in </span><span class="number">0</span>..ops.num_limbs { |
| <span class="kw">let </span>formatted = <span class="macro">format!</span>(<span class="string">"{:016x}"</span>, actual[ops.num_limbs - j - <span class="number">1</span>]); |
| s.push_str(<span class="kw-2">&</span>formatted); |
| } |
| <span class="macro">panic!</span>(<span class="string">"Actual != Expected,\nActual = {}"</span>, s); |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>consume_elem(ops: <span class="kw-2">&</span>CommonOps, test_case: <span class="kw-2">&mut </span>test::TestCase, name: <span class="kw-2">&</span>str) -> Elem<R> { |
| <span class="kw">let </span>bytes = consume_padded_bytes(ops, test_case, name); |
| <span class="kw">let </span>bytes = untrusted::Input::from(<span class="kw-2">&</span>bytes); |
| <span class="kw">let </span>r: Elem<Unencoded> = elem_parse_big_endian_fixed_consttime(ops, bytes).unwrap(); |
| <span class="comment">// XXX: “Transmute” this to an `Elem<R>`. |
| </span>Elem { |
| limbs: r.limbs, |
| m: PhantomData, |
| encoding: PhantomData, |
| } |
| } |
| |
| <span class="kw">fn </span>consume_scalar(ops: <span class="kw-2">&</span>CommonOps, test_case: <span class="kw-2">&mut </span>test::TestCase, name: <span class="kw-2">&</span>str) -> Scalar { |
| <span class="kw">let </span>bytes = test_case.consume_bytes(name); |
| <span class="kw">let </span>bytes = untrusted::Input::from(<span class="kw-2">&</span>bytes); |
| scalar_parse_big_endian_variable(ops, AllowZero::Yes, bytes).unwrap() |
| } |
| |
| <span class="kw">fn </span>consume_scalar_mont( |
| ops: <span class="kw-2">&</span>CommonOps, |
| test_case: <span class="kw-2">&mut </span>test::TestCase, |
| name: <span class="kw-2">&</span>str, |
| ) -> Scalar<R> { |
| <span class="kw">let </span>bytes = test_case.consume_bytes(name); |
| <span class="kw">let </span>bytes = untrusted::Input::from(<span class="kw-2">&</span>bytes); |
| <span class="kw">let </span>s = scalar_parse_big_endian_variable(ops, AllowZero::Yes, bytes).unwrap(); |
| <span class="comment">// “Transmute” it to a `Scalar<R>`. |
| </span>Scalar { |
| limbs: s.limbs, |
| m: PhantomData, |
| encoding: PhantomData, |
| } |
| } |
| |
| <span class="kw">fn </span>consume_padded_bytes( |
| ops: <span class="kw-2">&</span>CommonOps, |
| test_case: <span class="kw-2">&mut </span>test::TestCase, |
| name: <span class="kw-2">&</span>str, |
| ) -> Vec<u8> { |
| <span class="kw">let </span>unpadded_bytes = test_case.consume_bytes(name); |
| <span class="kw">let </span><span class="kw-2">mut </span>bytes = <span class="macro">vec!</span>[<span class="number">0</span>; (ops.num_limbs * LIMB_BYTES) - unpadded_bytes.len()]; |
| bytes.extend(<span class="kw-2">&</span>unpadded_bytes); |
| bytes |
| } |
| } |
| |
| <span class="kw">mod </span>elem; |
| <span class="kw">pub mod </span>p256; |
| <span class="kw">pub mod </span>p384; |
| </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> |
