| <!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 `attestation/src/key.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>key.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="../../teaclave_attestation/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="../../teaclave_attestation/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| </span><span class="doccomment">//! This module implements ECDSA (NIST P-256 curve) keys related functions. You |
| //! can export private key to a DER format or create a certificate with |
| //! extension for TLS-based remote attestation. |
| |
| </span><span class="kw">use </span>anyhow::Result; |
| <span class="kw">use </span>sgx_crypto::ecc::{EcKeyPair, EcPublicKey}; |
| |
| <span class="doccomment">/// Validation days of cert for TLS connection. |
| </span><span class="kw">const </span>CERT_VALID_DAYS: i64 = <span class="number">90i64</span>; |
| |
| <span class="doccomment">/// NistP256KeyPair stores a pair of ECDSA (private, public) key based on the |
| /// NIST P-256 curve (a.k.a secp256r1). |
| </span><span class="kw">pub struct </span>NistP256KeyPair { |
| inner: EcKeyPair, |
| } |
| |
| <span class="kw">impl </span>NistP256KeyPair { |
| <span class="doccomment">/// Generate a ECDSA key pair. |
| </span><span class="kw">pub fn </span>new() -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>inner = EcKeyPair::create()<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(<span class="self">Self </span>{ inner }) |
| } |
| |
| <span class="kw">pub fn </span>pub_k(<span class="kw-2">&</span><span class="self">self</span>) -> EcPublicKey { |
| <span class="self">self</span>.inner.public_key() |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>private_key_into_der(<span class="kw-2">&</span><span class="self">self</span>) -> Vec<u8> { |
| <span class="kw">use </span>bit_vec::BitVec; |
| <span class="kw">use </span>yasna::construct_der; |
| <span class="kw">use </span>yasna::models::ObjectIdentifier; |
| <span class="kw">use </span>yasna::Tag; |
| |
| <span class="comment">// Construct useful OIDs. |
| </span><span class="kw">let </span>ec_public_key_oid = ObjectIdentifier::from_slice(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">840</span>, <span class="number">10045</span>, <span class="number">2</span>, <span class="number">1</span>]); |
| <span class="kw">let </span>prime256v1_oid = ObjectIdentifier::from_slice(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">840</span>, <span class="number">10045</span>, <span class="number">3</span>, <span class="number">1</span>, <span class="number">7</span>]); |
| |
| <span class="kw">let </span>pub_key_bytes = <span class="self">self</span>.public_key_into_bytes(); |
| <span class="kw">let </span>prv_key_bytes = <span class="self">self</span>.private_key_into_bytes(); |
| |
| <span class="comment">// Construct private key in DER. |
| </span>construct_der(|writer| { |
| writer.write_sequence(|writer| { |
| writer.next().write_u8(<span class="number">0</span>); |
| writer.next().write_sequence(|writer| { |
| writer.next().write_oid(<span class="kw-2">&</span>ec_public_key_oid); |
| writer.next().write_oid(<span class="kw-2">&</span>prime256v1_oid); |
| }); |
| <span class="kw">let </span>inner_key_der = construct_der(|writer| { |
| writer.write_sequence(|writer| { |
| writer.next().write_u8(<span class="number">1</span>); |
| writer.next().write_bytes(<span class="kw-2">&</span>prv_key_bytes); |
| writer.next().write_tagged(Tag::context(<span class="number">1</span>), |writer| { |
| writer.write_bitvec(<span class="kw-2">&</span>BitVec::from_bytes(<span class="kw-2">&</span>pub_key_bytes)); |
| }); |
| }); |
| }); |
| writer.next().write_bytes(<span class="kw-2">&</span>inner_key_der); |
| }); |
| }) |
| } |
| |
| <span class="doccomment">/// create_cert_with_extension makes a self-signed x509-v3 cert with SGX |
| /// attestation report as extensions. |
| /// @reference [Internet X.509 Public Key Infrastructure Certificate and |
| /// Certificate Revocation List (CRL) Profile][1] |
| /// |
| /// [1]: https://tools.ietf.org/pdf/rfc5280.pdf |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>create_cert_with_extension( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| issuer: <span class="kw-2">&</span>str, |
| subject: <span class="kw-2">&</span>str, |
| payload: <span class="kw-2">&</span>[u8], |
| ) -> Vec<u8> { |
| <span class="kw">use </span><span class="kw">crate</span>::cert::<span class="kw-2">*</span>; |
| <span class="kw">use </span>bit_vec::BitVec; |
| <span class="kw">use </span>chrono::TimeZone; |
| <span class="kw">use </span>num_bigint::BigUint; |
| <span class="kw">use </span>std::time::SystemTime; |
| <span class="kw">use </span>std::time::UNIX_EPOCH; |
| <span class="attribute">#[allow(unused_imports)] |
| #[cfg(feature = <span class="string">"mesalock_sgx"</span>)] |
| </span><span class="kw">use </span>std::untrusted::time::SystemTimeEx; |
| <span class="kw">use </span>yasna::construct_der; |
| <span class="kw">use </span>yasna::models::{ObjectIdentifier, UTCTime}; |
| |
| <span class="comment">// Construct useful OIDs. |
| </span><span class="kw">let </span>ecdsa_with_sha256_oid = ObjectIdentifier::from_slice(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">840</span>, <span class="number">10045</span>, <span class="number">4</span>, <span class="number">3</span>, <span class="number">2</span>]); |
| <span class="kw">let </span>common_name_oid = ObjectIdentifier::from_slice(<span class="kw-2">&</span>[<span class="number">2</span>, <span class="number">5</span>, <span class="number">4</span>, <span class="number">3</span>]); |
| <span class="kw">let </span>ec_public_key_oid = ObjectIdentifier::from_slice(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">840</span>, <span class="number">10045</span>, <span class="number">2</span>, <span class="number">1</span>]); |
| <span class="kw">let </span>prime256v1_oid = ObjectIdentifier::from_slice(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">840</span>, <span class="number">10045</span>, <span class="number">3</span>, <span class="number">1</span>, <span class="number">7</span>]); |
| <span class="kw">let </span>comment_oid = ObjectIdentifier::from_slice(<span class="kw-2">&</span>[<span class="number">2</span>, <span class="number">16</span>, <span class="number">840</span>, <span class="number">1</span>, <span class="number">113_730</span>, <span class="number">1</span>, <span class="number">13</span>]); |
| |
| <span class="kw">let </span>pub_key_bytes = <span class="self">self</span>.public_key_into_bytes(); |
| |
| <span class="comment">// UNIX_EPOCH is the earliest time stamp. This unwrap should constantly succeed. |
| </span><span class="kw">let </span>now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap(); |
| <span class="kw">let </span>issue_ts = chrono::Utc.timestamp_opt(now.as_secs() <span class="kw">as </span>i64, <span class="number">0</span>).unwrap(); |
| |
| <span class="comment">// This is guaranteed to be a valid duration. |
| </span><span class="kw">let </span>expire = now + chrono::Duration::days(CERT_VALID_DAYS).to_std().unwrap(); |
| <span class="kw">let </span>expire_ts = chrono::Utc |
| .timestamp_opt(expire.as_secs() <span class="kw">as </span>i64, <span class="number">0</span>) |
| .unwrap(); |
| |
| <span class="comment">// Construct certificate with payload in extension in DER. |
| </span><span class="kw">let </span>tbs_cert_der = construct_der(|writer| { |
| <span class="kw">let </span>version = <span class="number">2i8</span>; |
| <span class="kw">let </span>serial = <span class="number">1u8</span>; |
| <span class="kw">let </span>cert_sign_algo = <span class="macro">asn1_seq!</span>(ecdsa_with_sha256_oid.clone()); |
| <span class="kw">let </span>issuer = <span class="macro">asn1_seq!</span>(<span class="macro">asn1_seq!</span>(<span class="macro">asn1_seq!</span>( |
| common_name_oid.clone(), |
| issuer.to_owned() |
| ))); |
| <span class="kw">let </span>valid_range = <span class="macro">asn1_seq!</span>( |
| UTCTime::from_datetime(<span class="kw-2">&</span>issue_ts), |
| UTCTime::from_datetime(<span class="kw-2">&</span>expire_ts), |
| ); |
| <span class="kw">let </span>subject = <span class="macro">asn1_seq!</span>(<span class="macro">asn1_seq!</span>(<span class="macro">asn1_seq!</span>( |
| common_name_oid.clone(), |
| subject.to_string(), |
| ))); |
| <span class="kw">let </span>pub_key = <span class="macro">asn1_seq!</span>( |
| <span class="macro">asn1_seq!</span>(ec_public_key_oid, prime256v1_oid,), |
| BitVec::from_bytes(<span class="kw-2">&</span>pub_key_bytes), |
| ); |
| <span class="kw">let </span>sgx_ra_cert_ext = <span class="macro">asn1_seq!</span>(<span class="macro">asn1_seq!</span>(comment_oid, payload.to_owned())); |
| <span class="kw">let </span>tbs_cert = <span class="macro">asn1_seq!</span>( |
| version, |
| serial, |
| cert_sign_algo, |
| issuer, |
| valid_range, |
| subject, |
| pub_key, |
| sgx_ra_cert_ext, |
| ); |
| TbsCert::dump(writer, tbs_cert); |
| }); |
| |
| <span class="comment">// There will be serious problems if this call fails. We might as well |
| // panic in this case, thus unwrap() |
| </span><span class="kw">let </span>sig = <span class="self">self |
| </span>.inner |
| .private_key() |
| .sign(tbs_cert_der.as_slice()) |
| .unwrap(); |
| |
| <span class="kw">let </span>sig_der = yasna::construct_der(|writer| { |
| writer.write_sequence(|writer| { |
| <span class="kw">let </span>sig = sig.signature(); |
| <span class="kw">let </span><span class="kw-2">mut </span>sig_x = sig.x; |
| sig_x.reverse(); |
| <span class="kw">let </span><span class="kw-2">mut </span>sig_y = sig.y; |
| sig_y.reverse(); |
| writer.next().write_biguint(<span class="kw-2">&</span>BigUint::from_slice(<span class="kw-2">&</span>sig_x)); |
| writer.next().write_biguint(<span class="kw-2">&</span>BigUint::from_slice(<span class="kw-2">&</span>sig_y)); |
| }); |
| }); |
| |
| yasna::construct_der(|writer| { |
| writer.write_sequence(|writer| { |
| writer.next().write_der(tbs_cert_der.as_slice()); |
| CertSignAlgo::dump(writer.next(), <span class="macro">asn1_seq!</span>(ecdsa_with_sha256_oid.clone())); |
| writer |
| .next() |
| .write_bitvec(<span class="kw-2">&</span>BitVec::from_bytes(sig_der.as_slice())); |
| }); |
| }) |
| } |
| |
| <span class="kw">fn </span>public_key_into_bytes(<span class="kw-2">&</span><span class="self">self</span>) -> Vec<u8> { |
| <span class="comment">// The first byte must be 4, which indicates the uncompressed encoding. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>pub_key_bytes: Vec<u8> = <span class="macro">vec!</span>[<span class="number">4</span>]; |
| <span class="kw">let </span>public_key = <span class="self">self</span>.pub_k().public_key(); |
| pub_key_bytes.extend(public_key.gx.iter().rev()); |
| pub_key_bytes.extend(public_key.gy.iter().rev()); |
| pub_key_bytes |
| } |
| |
| <span class="kw">fn </span>private_key_into_bytes(<span class="kw-2">&</span><span class="self">self</span>) -> Vec<u8> { |
| <span class="kw">let </span><span class="kw-2">mut </span>prv_key_bytes: Vec<u8> = <span class="macro">vec!</span>[]; |
| <span class="kw">let </span>private_key = <span class="self">self</span>.inner.private_key().private_key(); |
| prv_key_bytes.extend(private_key.r.iter().rev()); |
| prv_key_bytes |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="teaclave_attestation" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
