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- // Copyright 2016 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "net/tools/cert_verify_tool/verify_using_cert_verify_proc.h"
- #include <iostream>
- #include "base/cxx17_backports.h"
- #include "base/strings/strcat.h"
- #include "base/strings/string_util.h"
- #include "base/strings/stringprintf.h"
- #include "crypto/sha2.h"
- #include "net/base/net_errors.h"
- #include "net/cert/cert_verifier.h"
- #include "net/cert/cert_verify_proc.h"
- #include "net/cert/cert_verify_result.h"
- #include "net/cert/test_root_certs.h"
- #include "net/cert/x509_certificate.h"
- #include "net/cert/x509_util.h"
- #include "net/log/net_log_with_source.h"
- #include "net/tools/cert_verify_tool/cert_verify_tool_util.h"
- namespace {
- // Associates a printable name with an integer constant. Useful for providing
- // human-readable decoding of bitmask values.
- struct StringToConstant {
- const char* name;
- const int constant;
- };
- const StringToConstant kCertStatusFlags[] = {
- #define CERT_STATUS_FLAG(label, value) {#label, value},
- #include "net/cert/cert_status_flags_list.h"
- #undef CERT_STATUS_FLAG
- };
- // Writes a PEM-encoded file of |cert| and its chain.
- bool DumpX509CertificateChain(const base::FilePath& file_path,
- const net::X509Certificate* cert) {
- std::vector<std::string> pem_encoded;
- if (!cert->GetPEMEncodedChain(&pem_encoded)) {
- std::cerr << "ERROR: X509Certificate::GetPEMEncodedChain failed.\n";
- return false;
- }
- return WriteToFile(file_path, base::StrCat(pem_encoded));
- }
- void PrintCertStatus(int cert_status) {
- std::cout << base::StringPrintf("CertStatus: 0x%x\n", cert_status);
- for (const auto& flag : kCertStatusFlags) {
- if ((cert_status & flag.constant) == flag.constant)
- std::cout << " " << flag.name << "\n";
- }
- }
- } // namespace
- void PrintCertVerifyResult(const net::CertVerifyResult& result) {
- PrintDebugData(&result);
- PrintCertStatus(result.cert_status);
- if (result.has_sha1)
- std::cout << "has_sha1\n";
- if (result.has_sha1_leaf)
- std::cout << "has_sha1_leaf\n";
- if (result.is_issued_by_known_root)
- std::cout << "is_issued_by_known_root\n";
- if (result.is_issued_by_additional_trust_anchor)
- std::cout << "is_issued_by_additional_trust_anchor\n";
- if (result.verified_cert) {
- std::cout << "chain:\n "
- << FingerPrintCryptoBuffer(result.verified_cert->cert_buffer())
- << " " << SubjectFromX509Certificate(result.verified_cert.get())
- << "\n";
- for (const auto& intermediate :
- result.verified_cert->intermediate_buffers()) {
- std::cout << " " << FingerPrintCryptoBuffer(intermediate.get()) << " "
- << SubjectFromCryptoBuffer(intermediate.get()) << "\n";
- }
- }
- }
- bool VerifyUsingCertVerifyProc(
- net::CertVerifyProc* cert_verify_proc,
- const CertInput& target_der_cert,
- const std::string& hostname,
- const std::vector<CertInput>& intermediate_der_certs,
- const std::vector<CertInput>& root_der_certs,
- net::CRLSet* crl_set,
- const base::FilePath& dump_path) {
- std::vector<base::StringPiece> der_cert_chain;
- der_cert_chain.push_back(target_der_cert.der_cert);
- for (const auto& cert : intermediate_der_certs)
- der_cert_chain.push_back(cert.der_cert);
- scoped_refptr<net::X509Certificate> x509_target_and_intermediates =
- net::X509Certificate::CreateFromDERCertChain(der_cert_chain);
- if (!x509_target_and_intermediates) {
- std::cerr
- << "ERROR: X509Certificate::CreateFromDERCertChain failed on one or "
- "more of:\n";
- PrintCertError(" (target)", target_der_cert);
- for (const auto& cert : intermediate_der_certs)
- PrintCertError(" (intermediate)", cert);
- return false;
- }
- net::CertificateList x509_additional_trust_anchors;
- for (const auto& cert : root_der_certs) {
- scoped_refptr<net::X509Certificate> x509_root =
- net::X509Certificate::CreateFromBytes(
- base::as_bytes(base::make_span(cert.der_cert)));
- if (!x509_root)
- PrintCertError("ERROR: X509Certificate::CreateFromBytes failed:", cert);
- else
- x509_additional_trust_anchors.push_back(x509_root);
- }
- // TODO(mattm): add command line flags to configure VerifyFlags.
- int flags = 0;
- // Not all platforms support providing additional trust anchors to the
- // verifier. To workaround this, use TestRootCerts to modify the
- // system trust store globally.
- net::TestRootCerts* test_root_certs = net::TestRootCerts::GetInstance();
- CHECK(test_root_certs->IsEmpty());
- net::ScopedTestRoot scoped_test_roots;
- if (!x509_additional_trust_anchors.empty() &&
- !cert_verify_proc->SupportsAdditionalTrustAnchors()) {
- std::cerr << "NOTE: Additional trust anchors not supported on this "
- "platform. Using TestRootCerts instead.\n";
- scoped_test_roots.Reset(x509_additional_trust_anchors);
- x509_additional_trust_anchors.clear();
- }
- // TODO(crbug.com/634484): use a real netlog and print the results?
- net::CertVerifyResult result;
- int rv = cert_verify_proc->Verify(
- x509_target_and_intermediates.get(), hostname,
- /*ocsp_response=*/std::string(), /*sct_list=*/std::string(), flags,
- crl_set, x509_additional_trust_anchors, &result, net::NetLogWithSource());
- std::cout << "CertVerifyProc result: " << net::ErrorToShortString(rv) << "\n";
- PrintCertVerifyResult(result);
- if (!dump_path.empty() && result.verified_cert) {
- if (!DumpX509CertificateChain(dump_path, result.verified_cert.get())) {
- return false;
- }
- }
- return rv == net::OK;
- }
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