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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 types used to verify attestation reports. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::report::AttestationReport; |
| |
| <span class="kw">use </span>std::vec::Vec; |
| |
| <span class="kw">use </span>log::{debug, error}; |
| <span class="kw">use </span>teaclave_types::EnclaveAttr; |
| |
| <span class="doccomment">/// User defined verification function to further verify the attestation report. |
| </span><span class="kw">pub type </span>AttestationReportVerificationFn = <span class="kw">fn</span>(<span class="kw-2">&</span>AttestationReport) -> bool; |
| |
| <span class="doccomment">/// Type used to verify attestation reports (this can be set as a certificate |
| /// verifier in `rustls::ClientConfig`). |
| </span><span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>AttestationReportVerifier { |
| <span class="doccomment">/// Valid enclave attributes (only enclaves with attributes in this vector |
| /// will be accepted). |
| </span><span class="kw">pub </span>accepted_enclave_attrs: Vec<EnclaveAttr>, |
| <span class="doccomment">/// Root certificate of the attestation service provider (e.g., IAS). |
| </span><span class="kw">pub </span>root_ca: Vec<u8>, |
| <span class="doccomment">/// User defined function to verify the attestation report. |
| </span><span class="kw">pub </span>verifier: AttestationReportVerificationFn, |
| } |
| |
| <span class="doccomment">/// Checks if he quote's status is not `UnknownBadStatus` |
| </span><span class="kw">pub fn </span>universal_quote_verifier(report: <span class="kw-2">&</span>AttestationReport) -> bool { |
| <span class="macro">debug!</span>(<span class="string">"report.sgx_quote_status: {:?}"</span>, report.sgx_quote_status); |
| report.sgx_quote_status != <span class="kw">crate</span>::report::SgxQuoteStatus::UnknownBadStatus |
| } |
| |
| <span class="kw">impl </span>AttestationReportVerifier { |
| <span class="kw">pub fn </span>new( |
| accepted_enclave_attrs: Vec<EnclaveAttr>, |
| root_ca: <span class="kw-2">&</span>[u8], |
| verifier: AttestationReportVerificationFn, |
| ) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| accepted_enclave_attrs, |
| root_ca: root_ca.to_vec(), |
| verifier, |
| } |
| } |
| |
| <span class="doccomment">/// Verify whether the `MR_SIGNER` and `MR_ENCLAVE` in the attestation report is |
| /// accepted by us, which are defined in `accepted_enclave_attrs`. |
| </span><span class="kw">fn </span>verify_measures(<span class="kw-2">&</span><span class="self">self</span>, attestation_report: <span class="kw-2">&</span>AttestationReport) -> bool { |
| <span class="macro">debug!</span>(<span class="string">"verify measures"</span>); |
| <span class="kw">let </span>this_mr_signer = attestation_report |
| .sgx_quote_body |
| .isv_enclave_report |
| .mr_signer; |
| <span class="kw">let </span>this_mr_enclave = attestation_report |
| .sgx_quote_body |
| .isv_enclave_report |
| .mr_enclave; |
| |
| <span class="self">self</span>.accepted_enclave_attrs.iter().any(|a| { |
| a.measurement.mr_signer == this_mr_signer && a.measurement.mr_enclave == this_mr_enclave |
| }) |
| } |
| |
| <span class="doccomment">/// Verify TLS certificate. |
| </span><span class="kw">fn </span>verify_cert(<span class="kw-2">&</span><span class="self">self</span>, certs: <span class="kw-2">&</span>[rustls::Certificate]) -> bool { |
| <span class="macro">debug!</span>(<span class="string">"verify cert"</span>); |
| <span class="kw">if </span><span class="macro">cfg!</span>(sgx_sim) { |
| <span class="kw">return </span><span class="bool-val">true</span>; |
| } |
| |
| <span class="kw">let </span>report = <span class="kw">match </span>AttestationReport::from_cert(certs, <span class="kw-2">&</span><span class="self">self</span>.root_ca) { |
| <span class="prelude-val">Ok</span>(report) => report, |
| <span class="prelude-val">Err</span>(e) => { |
| <span class="macro">error!</span>(<span class="string">"cert verification error {:?}"</span>, e); |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| }; |
| |
| <span class="comment">// Enclave measures are not tested in test mode since we have |
| // a dedicated test enclave not known to production enclaves |
| </span><span class="kw">if </span><span class="macro">cfg!</span>(test_mode) { |
| <span class="kw">return </span>(<span class="self">self</span>.verifier)(<span class="kw-2">&</span>report); |
| } |
| |
| <span class="self">self</span>.verify_measures(<span class="kw-2">&</span>report) && (<span class="self">self</span>.verifier)(<span class="kw-2">&</span>report) |
| } |
| } |
| |
| <span class="kw">impl </span>rustls::ServerCertVerifier <span class="kw">for </span>AttestationReportVerifier { |
| <span class="kw">fn </span>verify_server_cert( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| _roots: <span class="kw-2">&</span>rustls::RootCertStore, |
| certs: <span class="kw-2">&</span>[rustls::Certificate], |
| _hostname: webpki::DNSNameRef, |
| _ocsp: <span class="kw-2">&</span>[u8], |
| ) -> std::result::Result<rustls::ServerCertVerified, rustls::TLSError> { |
| <span class="comment">// This call automatically verifies certificate signature |
| </span><span class="macro">debug!</span>(<span class="string">"verify server cert"</span>); |
| <span class="kw">if </span>certs.len() != <span class="number">1 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(rustls::TLSError::NoCertificatesPresented); |
| } |
| <span class="kw">if </span><span class="self">self</span>.verify_cert(certs) { |
| <span class="prelude-val">Ok</span>(rustls::ServerCertVerified::assertion()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(rustls::TLSError::WebPKIError( |
| webpki::Error::ExtensionValueInvalid, |
| )) |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>rustls::ClientCertVerifier <span class="kw">for </span>AttestationReportVerifier { |
| <span class="kw">fn </span>offer_client_auth(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="comment">// If test_mode is on, then disable TLS client authentication. |
| </span>!<span class="macro">cfg!</span>(test_mode) |
| } |
| |
| <span class="kw">fn </span>client_auth_root_subjects( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| _sni: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>webpki::DNSName>, |
| ) -> <span class="prelude-ty">Option</span><rustls::DistinguishedNames> { |
| <span class="prelude-val">Some</span>(rustls::DistinguishedNames::new()) |
| } |
| |
| <span class="kw">fn </span>verify_client_cert( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| certs: <span class="kw-2">&</span>[rustls::Certificate], |
| _sni: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>webpki::DNSName>, |
| ) -> std::result::Result<rustls::ClientCertVerified, rustls::TLSError> { |
| <span class="comment">// This call automatically verifies certificate signature |
| </span><span class="macro">debug!</span>(<span class="string">"verify client cert"</span>); |
| <span class="kw">if </span>certs.len() != <span class="number">1 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(rustls::TLSError::NoCertificatesPresented); |
| } |
| <span class="kw">if </span><span class="self">self</span>.verify_cert(certs) { |
| <span class="prelude-val">Ok</span>(rustls::ClientCertVerified::assertion()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(rustls::TLSError::WebPKIError( |
| webpki::Error::ExtensionValueInvalid, |
| )) |
| } |
| } |
| } |
| </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> |
