| <!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/webpki-0.21.4/src/cert.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>cert.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="../../webpki/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="../../webpki/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> |
| <span id="2">2</span> |
| <span id="3">3</span> |
| <span id="4">4</span> |
| <span id="5">5</span> |
| <span id="6">6</span> |
| <span id="7">7</span> |
| <span id="8">8</span> |
| <span id="9">9</span> |
| <span id="10">10</span> |
| <span id="11">11</span> |
| <span id="12">12</span> |
| <span id="13">13</span> |
| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
| <span id="17">17</span> |
| <span id="18">18</span> |
| <span id="19">19</span> |
| <span id="20">20</span> |
| <span id="21">21</span> |
| <span id="22">22</span> |
| <span id="23">23</span> |
| <span id="24">24</span> |
| <span id="25">25</span> |
| <span id="26">26</span> |
| <span id="27">27</span> |
| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
| <span id="34">34</span> |
| <span id="35">35</span> |
| <span id="36">36</span> |
| <span id="37">37</span> |
| <span id="38">38</span> |
| <span id="39">39</span> |
| <span id="40">40</span> |
| <span id="41">41</span> |
| <span id="42">42</span> |
| <span id="43">43</span> |
| <span id="44">44</span> |
| <span id="45">45</span> |
| <span id="46">46</span> |
| <span id="47">47</span> |
| <span id="48">48</span> |
| <span id="49">49</span> |
| <span id="50">50</span> |
| <span id="51">51</span> |
| <span id="52">52</span> |
| <span id="53">53</span> |
| <span id="54">54</span> |
| <span id="55">55</span> |
| <span id="56">56</span> |
| <span id="57">57</span> |
| <span id="58">58</span> |
| <span id="59">59</span> |
| <span id="60">60</span> |
| <span id="61">61</span> |
| <span id="62">62</span> |
| <span id="63">63</span> |
| <span id="64">64</span> |
| <span id="65">65</span> |
| <span id="66">66</span> |
| <span id="67">67</span> |
| <span id="68">68</span> |
| <span id="69">69</span> |
| <span id="70">70</span> |
| <span id="71">71</span> |
| <span id="72">72</span> |
| <span id="73">73</span> |
| <span id="74">74</span> |
| <span id="75">75</span> |
| <span id="76">76</span> |
| <span id="77">77</span> |
| <span id="78">78</span> |
| <span id="79">79</span> |
| <span id="80">80</span> |
| <span id="81">81</span> |
| <span id="82">82</span> |
| <span id="83">83</span> |
| <span id="84">84</span> |
| <span id="85">85</span> |
| <span id="86">86</span> |
| <span id="87">87</span> |
| <span id="88">88</span> |
| <span id="89">89</span> |
| <span id="90">90</span> |
| <span id="91">91</span> |
| <span id="92">92</span> |
| <span id="93">93</span> |
| <span id="94">94</span> |
| <span id="95">95</span> |
| <span id="96">96</span> |
| <span id="97">97</span> |
| <span id="98">98</span> |
| <span id="99">99</span> |
| <span id="100">100</span> |
| <span id="101">101</span> |
| <span id="102">102</span> |
| <span id="103">103</span> |
| <span id="104">104</span> |
| <span id="105">105</span> |
| <span id="106">106</span> |
| <span id="107">107</span> |
| <span id="108">108</span> |
| <span id="109">109</span> |
| <span id="110">110</span> |
| <span id="111">111</span> |
| <span id="112">112</span> |
| <span id="113">113</span> |
| <span id="114">114</span> |
| <span id="115">115</span> |
| <span id="116">116</span> |
| <span id="117">117</span> |
| <span id="118">118</span> |
| <span id="119">119</span> |
| <span id="120">120</span> |
| <span id="121">121</span> |
| <span id="122">122</span> |
| <span id="123">123</span> |
| <span id="124">124</span> |
| <span id="125">125</span> |
| <span id="126">126</span> |
| <span id="127">127</span> |
| <span id="128">128</span> |
| <span id="129">129</span> |
| <span id="130">130</span> |
| <span id="131">131</span> |
| <span id="132">132</span> |
| <span id="133">133</span> |
| <span id="134">134</span> |
| <span id="135">135</span> |
| <span id="136">136</span> |
| <span id="137">137</span> |
| <span id="138">138</span> |
| <span id="139">139</span> |
| <span id="140">140</span> |
| <span id="141">141</span> |
| <span id="142">142</span> |
| <span id="143">143</span> |
| <span id="144">144</span> |
| <span id="145">145</span> |
| <span id="146">146</span> |
| <span id="147">147</span> |
| <span id="148">148</span> |
| <span id="149">149</span> |
| <span id="150">150</span> |
| <span id="151">151</span> |
| <span id="152">152</span> |
| <span id="153">153</span> |
| <span id="154">154</span> |
| <span id="155">155</span> |
| <span id="156">156</span> |
| <span id="157">157</span> |
| <span id="158">158</span> |
| <span id="159">159</span> |
| <span id="160">160</span> |
| <span id="161">161</span> |
| <span id="162">162</span> |
| <span id="163">163</span> |
| <span id="164">164</span> |
| <span id="165">165</span> |
| <span id="166">166</span> |
| <span id="167">167</span> |
| <span id="168">168</span> |
| <span id="169">169</span> |
| <span id="170">170</span> |
| <span id="171">171</span> |
| <span id="172">172</span> |
| <span id="173">173</span> |
| <span id="174">174</span> |
| <span id="175">175</span> |
| <span id="176">176</span> |
| <span id="177">177</span> |
| <span id="178">178</span> |
| <span id="179">179</span> |
| <span id="180">180</span> |
| <span id="181">181</span> |
| <span id="182">182</span> |
| <span id="183">183</span> |
| <span id="184">184</span> |
| <span id="185">185</span> |
| <span id="186">186</span> |
| <span id="187">187</span> |
| <span id="188">188</span> |
| <span id="189">189</span> |
| <span id="190">190</span> |
| <span id="191">191</span> |
| <span id="192">192</span> |
| <span id="193">193</span> |
| <span id="194">194</span> |
| <span id="195">195</span> |
| <span id="196">196</span> |
| <span id="197">197</span> |
| <span id="198">198</span> |
| <span id="199">199</span> |
| <span id="200">200</span> |
| <span id="201">201</span> |
| <span id="202">202</span> |
| <span id="203">203</span> |
| <span id="204">204</span> |
| <span id="205">205</span> |
| <span id="206">206</span> |
| <span id="207">207</span> |
| <span id="208">208</span> |
| <span id="209">209</span> |
| <span id="210">210</span> |
| <span id="211">211</span> |
| <span id="212">212</span> |
| <span id="213">213</span> |
| <span id="214">214</span> |
| <span id="215">215</span> |
| <span id="216">216</span> |
| <span id="217">217</span> |
| <span id="218">218</span> |
| <span id="219">219</span> |
| <span id="220">220</span> |
| <span id="221">221</span> |
| <span id="222">222</span> |
| </pre><pre class="rust"><code><span class="comment">// Copyright 2015 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>::{der, signed_data, Error}; |
| |
| <span class="kw">pub enum </span>EndEntityOrCA<<span class="lifetime">'a</span>> { |
| EndEntity, |
| CA(<span class="kw-2">&</span><span class="lifetime">'a </span>Cert<<span class="lifetime">'a</span>>), |
| } |
| |
| <span class="kw">pub struct </span>Cert<<span class="lifetime">'a</span>> { |
| <span class="kw">pub </span>ee_or_ca: EndEntityOrCA<<span class="lifetime">'a</span>>, |
| |
| <span class="kw">pub </span>signed_data: signed_data::SignedData<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>issuer: untrusted::Input<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>validity: untrusted::Input<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>subject: untrusted::Input<<span class="lifetime">'a</span>>, |
| <span class="kw">pub </span>spki: der::Value<<span class="lifetime">'a</span>>, |
| |
| <span class="kw">pub </span>basic_constraints: <span class="prelude-ty">Option</span><untrusted::Input<<span class="lifetime">'a</span>>>, |
| <span class="kw">pub </span>eku: <span class="prelude-ty">Option</span><untrusted::Input<<span class="lifetime">'a</span>>>, |
| <span class="kw">pub </span>name_constraints: <span class="prelude-ty">Option</span><untrusted::Input<<span class="lifetime">'a</span>>>, |
| <span class="kw">pub </span>subject_alt_name: <span class="prelude-ty">Option</span><untrusted::Input<<span class="lifetime">'a</span>>>, |
| } |
| |
| <span class="kw">pub fn </span>parse_cert<<span class="lifetime">'a</span>>( |
| cert_der: untrusted::Input<<span class="lifetime">'a</span>>, ee_or_ca: EndEntityOrCA<<span class="lifetime">'a</span>>, |
| ) -> <span class="prelude-ty">Result</span><Cert<<span class="lifetime">'a</span>>, Error> { |
| parse_cert_internal(cert_der, ee_or_ca, certificate_serial_number) |
| } |
| |
| <span class="doccomment">/// Used by `parse_cert` for regular certificates (end-entity and intermediate) |
| /// and by `cert_der_as_trust_anchor` for trust anchors encoded as |
| /// certificates. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>parse_cert_internal<<span class="lifetime">'a</span>>( |
| cert_der: untrusted::Input<<span class="lifetime">'a</span>>, ee_or_ca: EndEntityOrCA<<span class="lifetime">'a</span>>, |
| serial_number: <span class="kw">fn</span>(input: <span class="kw-2">&mut </span>untrusted::Reader<<span class="lifetime">'_</span>>) -> <span class="prelude-ty">Result</span><(), Error>, |
| ) -> <span class="prelude-ty">Result</span><Cert<<span class="lifetime">'a</span>>, Error> { |
| <span class="kw">let </span>(tbs, signed_data) = cert_der.read_all(Error::BadDER, |cert_der| { |
| der::nested( |
| cert_der, |
| der::Tag::Sequence, |
| Error::BadDER, |
| signed_data::parse_signed_data, |
| ) |
| })<span class="question-mark">?</span>; |
| |
| tbs.read_all(Error::BadDER, |tbs| { |
| version3(tbs)<span class="question-mark">?</span>; |
| serial_number(tbs)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>signature = der::expect_tag_and_get_value(tbs, der::Tag::Sequence)<span class="question-mark">?</span>; |
| <span class="comment">// TODO: In mozilla::pkix, the comparison is done based on the |
| // normalized value (ignoring whether or not there is an optional NULL |
| // parameter for RSA-based algorithms), so this may be too strict. |
| </span><span class="kw">if </span>signature != signed_data.algorithm { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::SignatureAlgorithmMismatch); |
| } |
| |
| <span class="kw">let </span>issuer = der::expect_tag_and_get_value(tbs, der::Tag::Sequence)<span class="question-mark">?</span>; |
| <span class="kw">let </span>validity = der::expect_tag_and_get_value(tbs, der::Tag::Sequence)<span class="question-mark">?</span>; |
| <span class="kw">let </span>subject = der::expect_tag_and_get_value(tbs, der::Tag::Sequence)<span class="question-mark">?</span>; |
| <span class="kw">let </span>spki = der::expect_tag(tbs, der::Tag::Sequence)<span class="question-mark">?</span>; |
| |
| <span class="comment">// In theory there could be fields [1] issuerUniqueID and [2] |
| // subjectUniqueID, but in practice there never are, and to keep the |
| // code small and simple we don't accept any certificates that do |
| // contain them. |
| |
| </span><span class="kw">let </span><span class="kw-2">mut </span>cert = Cert { |
| ee_or_ca, |
| |
| signed_data, |
| issuer, |
| validity, |
| subject, |
| spki, |
| |
| basic_constraints: <span class="prelude-val">None</span>, |
| eku: <span class="prelude-val">None</span>, |
| name_constraints: <span class="prelude-val">None</span>, |
| subject_alt_name: <span class="prelude-val">None</span>, |
| }; |
| |
| <span class="comment">// mozilla::pkix allows the extensions to be omitted. However, since |
| // the subjectAltName extension is mandatory, the extensions are |
| // mandatory too, and we enforce that. Also, mozilla::pkix includes |
| // special logic for handling critical Netscape Cert Type extensions. |
| // That has been intentionally omitted. |
| |
| </span>der::nested_mut( |
| tbs, |
| der::Tag::ContextSpecificConstructed3, |
| Error::BadDER, |
| |tagged| { |
| der::nested_of_mut( |
| tagged, |
| der::Tag::Sequence, |
| der::Tag::Sequence, |
| Error::BadDER, |
| |extension| { |
| <span class="kw">let </span>extn_id = der::expect_tag_and_get_value(extension, der::Tag::OID)<span class="question-mark">?</span>; |
| <span class="kw">let </span>critical = der::optional_boolean(extension)<span class="question-mark">?</span>; |
| <span class="kw">let </span>extn_value = |
| der::expect_tag_and_get_value(extension, der::Tag::OctetString)<span class="question-mark">?</span>; |
| <span class="kw">match </span>remember_extension(<span class="kw-2">&mut </span>cert, extn_id, extn_value)<span class="question-mark">? </span>{ |
| Understood::No <span class="kw">if </span>critical => <span class="prelude-val">Err</span>(Error::UnsupportedCriticalExtension), |
| <span class="kw">_ </span>=> <span class="prelude-val">Ok</span>(()), |
| } |
| }, |
| ) |
| }, |
| )<span class="question-mark">?</span>; |
| |
| <span class="prelude-val">Ok</span>(cert) |
| }) |
| } |
| |
| <span class="comment">// mozilla::pkix supports v1, v2, v3, and v4, including both the implicit |
| // (correct) and explicit (incorrect) encoding of v1. We allow only v3. |
| </span><span class="kw">fn </span>version3(input: <span class="kw-2">&mut </span>untrusted::Reader) -> <span class="prelude-ty">Result</span><(), Error> { |
| der::nested( |
| input, |
| der::Tag::ContextSpecificConstructed0, |
| Error::BadDER, |
| |input| { |
| <span class="kw">let </span>version = der::small_nonnegative_integer(input)<span class="question-mark">?</span>; |
| <span class="kw">if </span>version != <span class="number">2 </span>{ |
| <span class="comment">// v3 |
| </span><span class="kw">return </span><span class="prelude-val">Err</span>(Error::UnsupportedCertVersion); |
| } |
| <span class="prelude-val">Ok</span>(()) |
| }, |
| ) |
| } |
| |
| <span class="kw">pub fn </span>certificate_serial_number(input: <span class="kw-2">&mut </span>untrusted::Reader) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="comment">// https://tools.ietf.org/html/rfc5280#section-4.1.2.2: |
| // * Conforming CAs MUST NOT use serialNumber values longer than 20 octets." |
| // * "The serial number MUST be a positive integer [...]" |
| |
| </span><span class="kw">let </span>value = der::positive_integer(input)<span class="question-mark">?</span>; |
| <span class="kw">if </span>value.big_endian_without_leading_zero().len() > <span class="number">20 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::BadDER); |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">enum </span>Understood { |
| Yes, |
| No, |
| } |
| |
| <span class="kw">fn </span>remember_extension<<span class="lifetime">'a</span>>( |
| cert: <span class="kw-2">&mut </span>Cert<<span class="lifetime">'a</span>>, extn_id: untrusted::Input, value: untrusted::Input<<span class="lifetime">'a</span>>, |
| ) -> <span class="prelude-ty">Result</span><Understood, Error> { |
| <span class="comment">// We don't do anything with certificate policies so we can safely ignore |
| // all policy-related stuff. We assume that the policy-related extensions |
| // are not marked critical. |
| |
| // id-ce 2.5.29 |
| </span><span class="kw">static </span>ID_CE: [u8; <span class="number">2</span>] = <span class="macro">oid!</span>[<span class="number">2</span>, <span class="number">5</span>, <span class="number">29</span>]; |
| |
| <span class="kw">if </span>extn_id.len() != ID_CE.len() + <span class="number">1 </span>|| !extn_id.as_slice_less_safe().starts_with(<span class="kw-2">&</span>ID_CE) { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(Understood::No); |
| } |
| |
| <span class="kw">let </span>out = <span class="kw">match </span><span class="kw-2">*</span>extn_id.as_slice_less_safe().last().unwrap() { |
| <span class="comment">// id-ce-keyUsage 2.5.29.15. We ignore the KeyUsage extension. For CA |
| // certificates, BasicConstraints.cA makes KeyUsage redundant. Firefox |
| // and other common browsers do not check KeyUsage for end-entities, |
| // though it would be kind of nice to ensure that a KeyUsage without |
| // the keyEncipherment bit could not be used for RSA key exchange. |
| </span><span class="number">15 </span>=> { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(Understood::Yes); |
| }, |
| |
| <span class="comment">// id-ce-subjectAltName 2.5.29.17 |
| </span><span class="number">17 </span>=> <span class="kw-2">&mut </span>cert.subject_alt_name, |
| |
| <span class="comment">// id-ce-basicConstraints 2.5.29.19 |
| </span><span class="number">19 </span>=> <span class="kw-2">&mut </span>cert.basic_constraints, |
| |
| <span class="comment">// id-ce-nameConstraints 2.5.29.30 |
| </span><span class="number">30 </span>=> <span class="kw-2">&mut </span>cert.name_constraints, |
| |
| <span class="comment">// id-ce-extKeyUsage 2.5.29.37 |
| </span><span class="number">37 </span>=> <span class="kw-2">&mut </span>cert.eku, |
| |
| <span class="kw">_ </span>=> { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(Understood::No); |
| }, |
| }; |
| |
| <span class="kw">match </span><span class="kw-2">*</span>out { |
| <span class="prelude-val">Some</span>(..) => { |
| <span class="comment">// The certificate contains more than one instance of this |
| // extension. |
| </span><span class="kw">return </span><span class="prelude-val">Err</span>(Error::ExtensionValueInvalid); |
| }, |
| <span class="prelude-val">None </span>=> { |
| <span class="comment">// All the extensions that we care about are wrapped in a SEQUENCE. |
| </span><span class="kw">let </span>sequence_value = value.read_all(Error::BadDER, |value| { |
| der::expect_tag_and_get_value(value, der::Tag::Sequence) |
| })<span class="question-mark">?</span>; |
| <span class="kw-2">*</span>out = <span class="prelude-val">Some</span>(sequence_value); |
| }, |
| } |
| |
| <span class="prelude-val">Ok</span>(Understood::Yes) |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="webpki" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
