| <!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/platform/sgx.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>sgx.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 provides SGX platform related functions like getting local |
| //! report and transform into a remotely verifiable quote. |
| </span><span class="attribute">#![cfg(feature = <span class="string">"mesalock_sgx"</span>)] |
| |
| </span><span class="kw">use </span><span class="kw">super</span>::Result; |
| <span class="kw">use </span>log::debug; |
| <span class="kw">use </span>sgx_crypto::ecc::EcPublicKey; |
| <span class="kw">use </span>sgx_crypto::sha::Sha256; |
| <span class="kw">use </span>sgx_rand::{RdRand, Rng}; |
| <span class="kw">use </span>sgx_tse::{EnclaveReport, EnclaveTarget}; |
| <span class="kw">use </span>sgx_types::error::SgxStatus; |
| <span class="kw">use </span>sgx_types::error::SgxStatus::Success; |
| <span class="kw">use </span>sgx_types::types::<span class="kw-2">*</span>; |
| <span class="attribute">#[derive(thiserror::Error, Debug)] |
| |
| </span><span class="kw">pub enum </span>PlatformError { |
| <span class="attribute">#[error(<span class="string">"Failed to call {0}: {1}"</span>)] |
| </span>OCallError(String, SgxStatus), |
| <span class="attribute">#[error(<span class="string">"Failed to initialize quote : {0}"</span>)] |
| </span>InitQuoteError(SgxStatus), |
| <span class="attribute">#[error(<span class="string">"Failed to create the report of the enclave: {0}"</span>)] |
| </span>CreateReportError(SgxStatus), |
| <span class="attribute">#[error(<span class="string">"Failed to get target info of this enclave: {0}"</span>)] |
| </span>GetSelfTargetInfoError(SgxStatus), |
| <span class="attribute">#[error(<span class="string">"Failed to get quote: {0}"</span>)] |
| </span>GetQuoteError(SgxStatus), |
| <span class="attribute">#[error(<span class="string">"Failed to verify quote: {0}"</span>)] |
| </span>VerifyReportError(SgxStatus), |
| <span class="attribute">#[error( |
| <span class="string">"Replay attack on report: quote_nonce.rand {0:?}, |
| qe_report.body.report_data.d[..32] {1:?}" |
| </span>)] |
| </span>ReportReplay(Vec<u8>, Vec<u8>), |
| <span class="attribute">#[error(<span class="string">"Failed to use SGX rng to generate random number: {0}"</span>)] |
| </span>SgxRngError(std::io::Error), |
| <span class="attribute">#[error(<span class="string">"Other SGX platform error: {0}"</span>)] |
| </span>Others(SgxStatus), |
| } |
| |
| <span class="kw">extern </span><span class="string">"C" </span>{ |
| <span class="doccomment">/// Ocall to use sgx_init_quote_ex to init the quote and key_id. |
| </span><span class="kw">fn </span>ocall_sgx_init_quote( |
| p_retval: <span class="kw-2">*mut </span>SgxStatus, |
| p_sgx_att_key_id: <span class="kw-2">*mut </span>AttKeyId, |
| p_target_info: <span class="kw-2">*mut </span>TargetInfo, |
| ) -> SgxStatus; |
| |
| <span class="doccomment">/// Ocall to get the required buffer size for the quote. |
| </span><span class="kw">fn </span>ocall_sgx_get_quote_size( |
| p_retval: <span class="kw-2">*mut </span>SgxStatus, |
| p_sgx_att_key_id: <span class="kw-2">*const </span>AttKeyId, |
| p_quote_size: <span class="kw-2">*mut </span>u32, |
| ) -> SgxStatus; |
| |
| <span class="doccomment">/// Ocall to use sgx_get_quote_ex to generate a quote with enclave's report. |
| </span><span class="kw">fn </span>ocall_sgx_get_quote( |
| p_retval: <span class="kw-2">*mut </span>SgxStatus, |
| p_report: <span class="kw-2">*const </span>Report, |
| p_sgx_att_key_id: <span class="kw-2">*const </span>AttKeyId, |
| p_qe_report_info: <span class="kw-2">*mut </span>QeReportInfo, |
| p_quote: <span class="kw-2">*mut </span>u8, |
| quote_size: u32, |
| ) -> SgxStatus; |
| } |
| |
| <span class="doccomment">/// Initialize SGX quote, return attestation key ID selected by the platform and |
| /// target information for creating report that only QE can verify. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>init_sgx_quote() -> <span class="prelude-ty">Result</span><(AttKeyId, TargetInfo)> { |
| <span class="macro">debug!</span>(<span class="string">"init_quote"</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>ti = TargetInfo::default(); |
| <span class="kw">let </span><span class="kw-2">mut </span>ak_id = AttKeyId::default(); |
| <span class="kw">let </span><span class="kw-2">mut </span>rt = SgxStatus::Unexpected; |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ ocall_sgx_init_quote(<span class="kw-2">&mut </span>rt <span class="kw">as _</span>, <span class="kw-2">&mut </span>ak_id <span class="kw">as _</span>, <span class="kw-2">&mut </span>ti <span class="kw">as _</span>) }; |
| |
| <span class="kw">if </span>res != Success { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(PlatformError::OCallError( |
| <span class="string">"ocall_sgx_init_quote"</span>.to_string(), |
| res, |
| )); |
| } |
| <span class="kw">if </span>rt != Success { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(PlatformError::InitQuoteError(rt)); |
| } |
| |
| <span class="prelude-val">Ok</span>((ak_id, ti)) |
| } |
| |
| <span class="doccomment">/// Create report of the enclave with target_info. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>create_sgx_isv_enclave_report( |
| pub_k: EcPublicKey, |
| target_info: TargetInfo, |
| ) -> <span class="prelude-ty">Result</span><Report> { |
| <span class="macro">debug!</span>(<span class="string">"create_report"</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>report_data = ReportData::default(); |
| <span class="kw">let </span>public_key = pub_k.public_key(); |
| <span class="kw">let </span><span class="kw-2">mut </span>pub_k_gx = public_key.gx; |
| pub_k_gx.reverse(); |
| <span class="kw">let </span><span class="kw-2">mut </span>pub_k_gy = public_key.gy; |
| pub_k_gy.reverse(); |
| report_data.d[..<span class="number">32</span>].clone_from_slice(<span class="kw-2">&</span>pub_k_gx); |
| report_data.d[<span class="number">32</span>..].clone_from_slice(<span class="kw-2">&</span>pub_k_gy); |
| |
| <span class="kw">let </span>report = |
| Report::for_target(<span class="kw-2">&</span>target_info, <span class="kw-2">&</span>report_data).map_err(PlatformError::CreateReportError)<span class="question-mark">?</span>; |
| |
| <span class="prelude-val">Ok</span>(report) |
| } |
| |
| <span class="doccomment">/// Get quote with attestation key ID and enclave's local report. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>get_sgx_quote(ak_id: <span class="kw-2">&</span>AttKeyId, report: Report) -> <span class="prelude-ty">Result</span><Vec<u8>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>rt = SgxStatus::Unexpected; |
| <span class="kw">let </span><span class="kw-2">mut </span>quote_len: u32 = <span class="number">0</span>; |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ ocall_sgx_get_quote_size(<span class="kw-2">&mut </span>rt <span class="kw">as _</span>, ak_id <span class="kw">as _</span>, <span class="kw-2">&mut </span>quote_len <span class="kw">as _</span>) }; |
| |
| <span class="kw">if </span>res != Success { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(PlatformError::OCallError( |
| <span class="string">"ocall_sgx_get_quote_size"</span>.to_string(), |
| res, |
| )); |
| } |
| <span class="kw">if </span>rt != Success { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(PlatformError::GetQuoteError(rt)); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>qe_report_info = QeReportInfo::default(); |
| <span class="kw">let </span><span class="kw-2">mut </span>quote_nonce = QuoteNonce::default(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>rng = RdRand::new().map_err(PlatformError::SgxRngError)<span class="question-mark">?</span>; |
| rng.fill_bytes(<span class="kw-2">&mut </span>quote_nonce.rand); |
| qe_report_info.nonce = quote_nonce; |
| |
| <span class="macro">debug!</span>(<span class="string">"sgx self target"</span>); |
| <span class="comment">// Provide the target information of ourselves so that we can verify the QE report |
| // returned with the quote |
| </span><span class="kw">let </span>tmp_target_info = TargetInfo::for_self().map_err(PlatformError::GetSelfTargetInfoError)<span class="question-mark">?</span>; |
| |
| qe_report_info.app_enclave_target_info = tmp_target_info; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>quote = <span class="macro">vec!</span>[<span class="number">0</span>; quote_len <span class="kw">as </span>usize]; |
| |
| <span class="macro">debug!</span>(<span class="string">"ocall_sgx_get_quote"</span>); |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ |
| ocall_sgx_get_quote( |
| <span class="kw-2">&mut </span>rt <span class="kw">as _</span>, |
| <span class="kw-2">&</span>report <span class="kw">as _</span>, |
| ak_id <span class="kw">as _</span>, |
| <span class="kw-2">&mut </span>qe_report_info <span class="kw">as _</span>, |
| quote.as_mut_ptr(), |
| quote_len, |
| ) |
| }; |
| |
| <span class="kw">if </span>res != Success { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(PlatformError::OCallError( |
| <span class="string">"ocall_sgx_get_quote"</span>.to_string(), |
| res, |
| )); |
| } |
| <span class="kw">if </span>rt != Success { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(PlatformError::GetQuoteError(rt)); |
| } |
| |
| <span class="macro">debug!</span>(<span class="string">"sgx verify report"</span>); |
| <span class="kw">let </span>qe_report = qe_report_info.qe_report; |
| <span class="comment">// Perform a check on qe_report to verify if the qe_report is valid. |
| </span>qe_report |
| .verify() |
| .map_err(PlatformError::VerifyReportError)<span class="question-mark">?</span>; |
| |
| <span class="comment">// Check qe_report to defend against replay attack. The purpose of |
| // p_qe_report is for the ISV enclave to confirm the QUOTE it received |
| // is not modified by the untrusted SW stack, and not a replay. The |
| // implementation in QE is to generate a REPORT targeting the ISV |
| // enclave (target info from p_report) , with the lower 32Bytes in |
| // report.data = SHA256(p_nonce||p_quote). The ISV enclave can verify |
| // the p_qe_report and report.data to confirm the QUOTE has not be |
| // modified and is not a replay. It is optional. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>rhs_vec: Vec<u8> = quote_nonce.rand.to_vec(); |
| rhs_vec.extend(<span class="kw-2">&</span>quote); |
| <span class="macro">debug!</span>(<span class="string">"sgx sha256 slice"</span>); |
| <span class="kw">let </span>rhs_hash = Sha256::digest(rhs_vec.as_slice()).map_err(PlatformError::Others)<span class="question-mark">?</span>; |
| <span class="kw">let </span>lhs_hash = <span class="kw-2">&</span>qe_report.body.report_data.d[..<span class="number">32</span>]; |
| <span class="kw">if </span>rhs_hash.as_ref() != lhs_hash { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(PlatformError::ReportReplay( |
| rhs_hash.to_vec(), |
| lhs_hash.to_vec(), |
| )); |
| } |
| |
| <span class="prelude-val">Ok</span>(quote) |
| } |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"enclave_unit_test"</span>, feature = <span class="string">"mesalock_sgx"</span>))] |
| </span><span class="kw">pub mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::key; |
| |
| <span class="kw">pub fn </span>test_init_sgx_quote() { |
| <span class="macro">assert!</span>(init_sgx_quote().is_ok()); |
| } |
| |
| <span class="kw">pub fn </span>test_create_sgx_isv_enclave_report() { |
| <span class="kw">let </span>(_ak_id, qe_target_info) = init_sgx_quote().unwrap(); |
| <span class="kw">let </span>key_pair = key::NistP256KeyPair::new().unwrap(); |
| <span class="kw">let </span>sgx_report_result = create_sgx_isv_enclave_report(key_pair.pub_k(), qe_target_info); |
| <span class="macro">assert!</span>(sgx_report_result.is_ok()); |
| } |
| |
| <span class="kw">pub fn </span>test_get_sgx_quote() { |
| <span class="kw">let </span>(ak_id, qe_target_info) = init_sgx_quote().unwrap(); |
| <span class="kw">let </span>key_pair = key::NistP256KeyPair::new().unwrap(); |
| <span class="kw">let </span>sgx_report = create_sgx_isv_enclave_report(key_pair.pub_k(), qe_target_info).unwrap(); |
| <span class="kw">let </span>quote_result = get_sgx_quote(<span class="kw-2">&</span>ak_id, sgx_report); |
| <span class="macro">assert!</span>(quote_result.is_ok()); |
| } |
| } |
| </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> |
