| <!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/openssl-0.10.54/src/ecdsa.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ecdsa.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="../../openssl/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="../../openssl/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="doccomment">//! Low level Elliptic Curve Digital Signature Algorithm (ECDSA) functions. |
| |
| </span><span class="kw">use </span>cfg_if::cfg_if; |
| <span class="kw">use </span>foreign_types::{ForeignType, ForeignTypeRef}; |
| <span class="kw">use </span>libc::c_int; |
| <span class="kw">use </span>std::mem; |
| <span class="kw">use </span>std::ptr; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::bn::{BigNum, BigNumRef}; |
| <span class="kw">use </span><span class="kw">crate</span>::ec::EcKeyRef; |
| <span class="kw">use </span><span class="kw">crate</span>::error::ErrorStack; |
| <span class="kw">use </span><span class="kw">crate</span>::pkey::{HasPrivate, HasPublic}; |
| <span class="kw">use </span><span class="kw">crate</span>::util::ForeignTypeRefExt; |
| <span class="kw">use crate</span>::{cvt_n, cvt_p, LenType}; |
| <span class="kw">use </span>openssl_macros::corresponds; |
| |
| <span class="macro">foreign_type_and_impl_send_sync! </span>{ |
| <span class="kw">type </span>CType = ffi::ECDSA_SIG; |
| <span class="kw">fn </span>drop = ffi::ECDSA_SIG_free; |
| |
| <span class="doccomment">/// A low level interface to ECDSA. |
| </span><span class="kw">pub struct </span>EcdsaSig; |
| <span class="doccomment">/// A reference to an [`EcdsaSig`]. |
| </span><span class="kw">pub struct </span>EcdsaSigRef; |
| } |
| |
| <span class="kw">impl </span>EcdsaSig { |
| <span class="doccomment">/// Computes a digital signature of the hash value `data` using the private EC key eckey. |
| </span><span class="attribute">#[corresponds(ECDSA_do_sign)] |
| </span><span class="kw">pub fn </span>sign<T>(data: <span class="kw-2">&</span>[u8], eckey: <span class="kw-2">&</span>EcKeyRef<T>) -> <span class="prelude-ty">Result</span><EcdsaSig, ErrorStack> |
| <span class="kw">where |
| </span>T: HasPrivate, |
| { |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert!</span>(data.len() <= c_int::max_value() <span class="kw">as </span>usize); |
| <span class="kw">let </span>sig = cvt_p(ffi::ECDSA_do_sign( |
| data.as_ptr(), |
| data.len() <span class="kw">as </span>LenType, |
| eckey.as_ptr(), |
| ))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(EcdsaSig::from_ptr(sig)) |
| } |
| } |
| |
| <span class="doccomment">/// Returns a new `EcdsaSig` by setting the `r` and `s` values associated with an ECDSA signature. |
| </span><span class="attribute">#[corresponds(ECDSA_SIG_set0)] |
| </span><span class="kw">pub fn </span>from_private_components(r: BigNum, s: BigNum) -> <span class="prelude-ty">Result</span><EcdsaSig, ErrorStack> { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>sig = cvt_p(ffi::ECDSA_SIG_new())<span class="question-mark">?</span>; |
| ECDSA_SIG_set0(sig, r.as_ptr(), s.as_ptr()); |
| mem::forget((r, s)); |
| <span class="prelude-val">Ok</span>(EcdsaSig::from_ptr(sig)) |
| } |
| } |
| |
| <span class="macro">from_der! </span>{ |
| <span class="doccomment">/// Decodes a DER-encoded ECDSA signature. |
| </span><span class="attribute">#[corresponds(d2i_ECDSA_SIG)] |
| </span>from_der, |
| EcdsaSig, |
| ffi::d2i_ECDSA_SIG |
| } |
| } |
| |
| <span class="kw">impl </span>EcdsaSigRef { |
| <span class="macro">to_der! </span>{ |
| <span class="doccomment">/// Serializes the ECDSA signature into a DER-encoded ECDSASignature structure. |
| </span><span class="attribute">#[corresponds(i2d_ECDSA_SIG)] |
| </span>to_der, |
| ffi::i2d_ECDSA_SIG |
| } |
| |
| <span class="doccomment">/// Verifies if the signature is a valid ECDSA signature using the given public key. |
| </span><span class="attribute">#[corresponds(ECDSA_do_verify)] |
| </span><span class="kw">pub fn </span>verify<T>(<span class="kw-2">&</span><span class="self">self</span>, data: <span class="kw-2">&</span>[u8], eckey: <span class="kw-2">&</span>EcKeyRef<T>) -> <span class="prelude-ty">Result</span><bool, ErrorStack> |
| <span class="kw">where |
| </span>T: HasPublic, |
| { |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert!</span>(data.len() <= c_int::max_value() <span class="kw">as </span>usize); |
| cvt_n(ffi::ECDSA_do_verify( |
| data.as_ptr(), |
| data.len() <span class="kw">as </span>LenType, |
| <span class="self">self</span>.as_ptr(), |
| eckey.as_ptr(), |
| )) |
| .map(|x| x == <span class="number">1</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Returns internal component: `r` of an `EcdsaSig`. (See X9.62 or FIPS 186-2) |
| </span><span class="attribute">#[corresponds(ECDSA_SIG_get0)] |
| </span><span class="kw">pub fn </span>r(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>BigNumRef { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>r = ptr::null(); |
| ECDSA_SIG_get0(<span class="self">self</span>.as_ptr(), <span class="kw-2">&mut </span>r, ptr::null_mut()); |
| BigNumRef::from_const_ptr(r) |
| } |
| } |
| |
| <span class="doccomment">/// Returns internal components: `s` of an `EcdsaSig`. (See X9.62 or FIPS 186-2) |
| </span><span class="attribute">#[corresponds(ECDSA_SIG_get0)] |
| </span><span class="kw">pub fn </span>s(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>BigNumRef { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>s = ptr::null(); |
| ECDSA_SIG_get0(<span class="self">self</span>.as_ptr(), ptr::null_mut(), <span class="kw-2">&mut </span>s); |
| BigNumRef::from_const_ptr(s) |
| } |
| } |
| } |
| |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(any(ossl110, libressl273))] </span>{ |
| <span class="kw">use </span>ffi::{ECDSA_SIG_set0, ECDSA_SIG_get0}; |
| } <span class="kw">else </span>{ |
| <span class="attribute">#[allow(bad_style)] |
| </span><span class="kw">unsafe fn </span>ECDSA_SIG_set0( |
| sig: <span class="kw-2">*mut </span>ffi::ECDSA_SIG, |
| r: <span class="kw-2">*mut </span>ffi::BIGNUM, |
| s: <span class="kw-2">*mut </span>ffi::BIGNUM, |
| ) -> c_int { |
| <span class="kw">if </span>r.is_null() || s.is_null() { |
| <span class="kw">return </span><span class="number">0</span>; |
| } |
| ffi::BN_clear_free((<span class="kw-2">*</span>sig).r); |
| ffi::BN_clear_free((<span class="kw-2">*</span>sig).s); |
| (<span class="kw-2">*</span>sig).r = r; |
| (<span class="kw-2">*</span>sig).s = s; |
| <span class="number">1 |
| </span>} |
| |
| <span class="attribute">#[allow(bad_style)] |
| </span><span class="kw">unsafe fn </span>ECDSA_SIG_get0( |
| sig: <span class="kw-2">*const </span>ffi::ECDSA_SIG, |
| pr: <span class="kw-2">*mut *const </span>ffi::BIGNUM, |
| ps: <span class="kw-2">*mut *const </span>ffi::BIGNUM) |
| { |
| <span class="kw">if </span>!pr.is_null() { |
| (<span class="kw-2">*</span>pr) = (<span class="kw-2">*</span>sig).r; |
| } |
| <span class="kw">if </span>!ps.is_null() { |
| (<span class="kw-2">*</span>ps) = (<span class="kw-2">*</span>sig).s; |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::ec::EcGroup; |
| <span class="kw">use </span><span class="kw">crate</span>::ec::EcKey; |
| <span class="kw">use </span><span class="kw">crate</span>::nid::Nid; |
| <span class="kw">use </span><span class="kw">crate</span>::pkey::{Private, Public}; |
| |
| <span class="kw">fn </span>get_public_key(group: <span class="kw-2">&</span>EcGroup, x: <span class="kw-2">&</span>EcKey<Private>) -> <span class="prelude-ty">Result</span><EcKey<Public>, ErrorStack> { |
| EcKey::from_public_key(group, x.public_key()) |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg_attr(osslconf = <span class="string">"OPENSSL_NO_EC2M"</span>, ignore)] |
| </span><span class="kw">fn </span>sign_and_verify() { |
| <span class="kw">let </span>group = EcGroup::from_curve_name(Nid::X9_62_PRIME256V1).unwrap(); |
| <span class="kw">let </span>private_key = EcKey::generate(<span class="kw-2">&</span>group).unwrap(); |
| <span class="kw">let </span>public_key = get_public_key(<span class="kw-2">&</span>group, <span class="kw-2">&</span>private_key).unwrap(); |
| |
| <span class="kw">let </span>private_key2 = EcKey::generate(<span class="kw-2">&</span>group).unwrap(); |
| <span class="kw">let </span>public_key2 = get_public_key(<span class="kw-2">&</span>group, <span class="kw-2">&</span>private_key2).unwrap(); |
| |
| <span class="kw">let </span>data = String::from(<span class="string">"hello"</span>); |
| <span class="kw">let </span>res = EcdsaSig::sign(data.as_bytes(), <span class="kw-2">&</span>private_key).unwrap(); |
| |
| <span class="comment">// Signature can be verified using the correct data & correct public key |
| </span><span class="kw">let </span>verification = res.verify(data.as_bytes(), <span class="kw-2">&</span>public_key).unwrap(); |
| <span class="macro">assert!</span>(verification); |
| |
| <span class="comment">// Signature will not be verified using the incorrect data but the correct public key |
| </span><span class="kw">let </span>verification2 = res |
| .verify(String::from(<span class="string">"hello2"</span>).as_bytes(), <span class="kw-2">&</span>public_key) |
| .unwrap(); |
| <span class="macro">assert!</span>(!verification2); |
| |
| <span class="comment">// Signature will not be verified using the correct data but the incorrect public key |
| </span><span class="kw">let </span>verification3 = res.verify(data.as_bytes(), <span class="kw-2">&</span>public_key2).unwrap(); |
| <span class="macro">assert!</span>(!verification3); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg_attr(osslconf = <span class="string">"OPENSSL_NO_EC2M"</span>, ignore)] |
| </span><span class="kw">fn </span>check_private_components() { |
| <span class="kw">let </span>group = EcGroup::from_curve_name(Nid::X9_62_PRIME256V1).unwrap(); |
| <span class="kw">let </span>private_key = EcKey::generate(<span class="kw-2">&</span>group).unwrap(); |
| <span class="kw">let </span>public_key = get_public_key(<span class="kw-2">&</span>group, <span class="kw-2">&</span>private_key).unwrap(); |
| <span class="kw">let </span>data = String::from(<span class="string">"hello"</span>); |
| <span class="kw">let </span>res = EcdsaSig::sign(data.as_bytes(), <span class="kw-2">&</span>private_key).unwrap(); |
| |
| <span class="kw">let </span>verification = res.verify(data.as_bytes(), <span class="kw-2">&</span>public_key).unwrap(); |
| <span class="macro">assert!</span>(verification); |
| |
| <span class="kw">let </span>r = res.r().to_owned().unwrap(); |
| <span class="kw">let </span>s = res.s().to_owned().unwrap(); |
| |
| <span class="kw">let </span>res2 = EcdsaSig::from_private_components(r, s).unwrap(); |
| <span class="kw">let </span>verification2 = res2.verify(data.as_bytes(), <span class="kw-2">&</span>public_key).unwrap(); |
| <span class="macro">assert!</span>(verification2); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg_attr(osslconf = <span class="string">"OPENSSL_NO_EC2M"</span>, ignore)] |
| </span><span class="kw">fn </span>serialize_deserialize() { |
| <span class="kw">let </span>group = EcGroup::from_curve_name(Nid::X9_62_PRIME256V1).unwrap(); |
| <span class="kw">let </span>private_key = EcKey::generate(<span class="kw-2">&</span>group).unwrap(); |
| <span class="kw">let </span>public_key = get_public_key(<span class="kw-2">&</span>group, <span class="kw-2">&</span>private_key).unwrap(); |
| |
| <span class="kw">let </span>data = String::from(<span class="string">"hello"</span>); |
| <span class="kw">let </span>res = EcdsaSig::sign(data.as_bytes(), <span class="kw-2">&</span>private_key).unwrap(); |
| |
| <span class="kw">let </span>der = res.to_der().unwrap(); |
| <span class="kw">let </span>sig = EcdsaSig::from_der(<span class="kw-2">&</span>der).unwrap(); |
| |
| <span class="kw">let </span>verification = sig.verify(data.as_bytes(), <span class="kw-2">&</span>public_key).unwrap(); |
| <span class="macro">assert!</span>(verification); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="openssl" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
