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// Copyright 2014 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 "chrome/browser/chromeos/policy/policy_cert_verifier.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/run_loop.h"
#include "chrome/browser/chromeos/net/cert_verify_proc_chromeos.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/test/test_browser_thread_bundle.h"
#include "crypto/nss_util_internal.h"
#include "crypto/scoped_test_nss_chromeos_user.h"
#include "net/base/net_log.h"
#include "net/base/test_completion_callback.h"
#include "net/base/test_data_directory.h"
#include "net/cert/cert_trust_anchor_provider.h"
#include "net/cert/cert_verify_result.h"
#include "net/cert/nss_cert_database_chromeos.h"
#include "net/cert/x509_certificate.h"
#include "net/test/cert_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace policy {
class PolicyCertVerifierTest : public testing::Test {
public:
PolicyCertVerifierTest()
: trust_anchor_used_(false), test_nss_user_("user1") {}
virtual ~PolicyCertVerifierTest() {}
virtual void SetUp() override {
ASSERT_TRUE(test_nss_user_.constructed_successfully());
test_nss_user_.FinishInit();
test_cert_db_.reset(new net::NSSCertDatabaseChromeOS(
crypto::GetPublicSlotForChromeOSUser(test_nss_user_.username_hash()),
crypto::GetPrivateSlotForChromeOSUser(
test_nss_user_.username_hash(),
base::Callback<void(crypto::ScopedPK11Slot)>())));
test_cert_db_->SetSlowTaskRunnerForTest(base::MessageLoopProxy::current());
cert_verifier_.reset(new PolicyCertVerifier(base::Bind(
&PolicyCertVerifierTest::OnTrustAnchorUsed, base::Unretained(this))));
cert_verifier_->InitializeOnIOThread(new chromeos::CertVerifyProcChromeOS(
crypto::GetPublicSlotForChromeOSUser(test_nss_user_.username_hash())));
test_ca_cert_ = LoadCertificate("root_ca_cert.pem", net::CA_CERT);
ASSERT_TRUE(test_ca_cert_.get());
test_server_cert_ = LoadCertificate("ok_cert.pem", net::SERVER_CERT);
ASSERT_TRUE(test_server_cert_.get());
test_ca_cert_list_.push_back(test_ca_cert_);
}
virtual void TearDown() override {
// Destroy |cert_verifier_| before destroying the ThreadBundle, otherwise
// BrowserThread::CurrentlyOn checks fail.
cert_verifier_.reset();
}
protected:
int VerifyTestServerCert(const net::TestCompletionCallback& test_callback,
net::CertVerifyResult* verify_result,
net::CertVerifier::RequestHandle* request_handle) {
return cert_verifier_->Verify(test_server_cert_.get(),
"127.0.0.1",
0,
NULL,
verify_result,
test_callback.callback(),
request_handle,
net::BoundNetLog());
}
bool SupportsAdditionalTrustAnchors() {
scoped_refptr<net::CertVerifyProc> proc =
net::CertVerifyProc::CreateDefault();
return proc->SupportsAdditionalTrustAnchors();
}
// Returns whether |cert_verifier| signalled usage of one of the additional
// trust anchors (i.e. of |test_ca_cert_|) for the first time or since the
// last call of this function.
bool WasTrustAnchorUsedAndReset() {
base::RunLoop().RunUntilIdle();
bool result = trust_anchor_used_;
trust_anchor_used_ = false;
return result;
}
// |test_ca_cert_| is the issuer of |test_server_cert_|.
scoped_refptr<net::X509Certificate> test_ca_cert_;
scoped_refptr<net::X509Certificate> test_server_cert_;
net::CertificateList test_ca_cert_list_;
scoped_ptr<net::NSSCertDatabaseChromeOS> test_cert_db_;
scoped_ptr<PolicyCertVerifier> cert_verifier_;
private:
void OnTrustAnchorUsed() {
trust_anchor_used_ = true;
}
scoped_refptr<net::X509Certificate> LoadCertificate(const std::string& name,
net::CertType type) {
scoped_refptr<net::X509Certificate> cert =
net::ImportCertFromFile(net::GetTestCertsDirectory(), name);
// No certificate is trusted right after it's loaded.
net::NSSCertDatabase::TrustBits trust =
test_cert_db_->GetCertTrust(cert.get(), type);
EXPECT_EQ(net::NSSCertDatabase::TRUST_DEFAULT, trust);
return cert;
}
bool trust_anchor_used_;
crypto::ScopedTestNSSChromeOSUser test_nss_user_;
content::TestBrowserThreadBundle thread_bundle_;
};
TEST_F(PolicyCertVerifierTest, VerifyUntrustedCert) {
// |test_server_cert_| is untrusted, so Verify() fails.
{
net::CertVerifyResult verify_result;
net::TestCompletionCallback callback;
net::CertVerifier::RequestHandle request_handle = NULL;
int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
ASSERT_EQ(net::ERR_IO_PENDING, error);
EXPECT_TRUE(request_handle);
error = callback.WaitForResult();
EXPECT_EQ(net::ERR_CERT_AUTHORITY_INVALID, error);
}
// Issuing the same request again hits the cache. This tests the synchronous
// path.
{
net::CertVerifyResult verify_result;
net::TestCompletionCallback callback;
net::CertVerifier::RequestHandle request_handle = NULL;
int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
EXPECT_EQ(net::ERR_CERT_AUTHORITY_INVALID, error);
}
EXPECT_FALSE(WasTrustAnchorUsedAndReset());
}
TEST_F(PolicyCertVerifierTest, VerifyTrustedCert) {
// Make the database trust |test_ca_cert_|.
net::NSSCertDatabase::ImportCertFailureList failure_list;
ASSERT_TRUE(test_cert_db_->ImportCACerts(
test_ca_cert_list_, net::NSSCertDatabase::TRUSTED_SSL, &failure_list));
ASSERT_TRUE(failure_list.empty());
// Verify that it is now trusted.
net::NSSCertDatabase::TrustBits trust =
test_cert_db_->GetCertTrust(test_ca_cert_.get(), net::CA_CERT);
EXPECT_EQ(net::NSSCertDatabase::TRUSTED_SSL, trust);
// Verify() successfully verifies |test_server_cert_| after it was imported.
net::CertVerifyResult verify_result;
net::TestCompletionCallback callback;
net::CertVerifier::RequestHandle request_handle = NULL;
int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
ASSERT_EQ(net::ERR_IO_PENDING, error);
EXPECT_TRUE(request_handle);
error = callback.WaitForResult();
EXPECT_EQ(net::OK, error);
// The additional trust anchors were not used, since the certificate is
// trusted from the database.
EXPECT_FALSE(WasTrustAnchorUsedAndReset());
}
TEST_F(PolicyCertVerifierTest, VerifyUsingAdditionalTrustAnchor) {
ASSERT_TRUE(SupportsAdditionalTrustAnchors());
// |test_server_cert_| is untrusted, so Verify() fails.
{
net::CertVerifyResult verify_result;
net::TestCompletionCallback callback;
net::CertVerifier::RequestHandle request_handle = NULL;
int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
ASSERT_EQ(net::ERR_IO_PENDING, error);
EXPECT_TRUE(request_handle);
error = callback.WaitForResult();
EXPECT_EQ(net::ERR_CERT_AUTHORITY_INVALID, error);
}
EXPECT_FALSE(WasTrustAnchorUsedAndReset());
// Verify() again with the additional trust anchors.
cert_verifier_->SetTrustAnchors(test_ca_cert_list_);
{
net::CertVerifyResult verify_result;
net::TestCompletionCallback callback;
net::CertVerifier::RequestHandle request_handle = NULL;
int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
ASSERT_EQ(net::ERR_IO_PENDING, error);
EXPECT_TRUE(request_handle);
error = callback.WaitForResult();
EXPECT_EQ(net::OK, error);
}
EXPECT_TRUE(WasTrustAnchorUsedAndReset());
// Verify() again with the additional trust anchors will hit the cache.
cert_verifier_->SetTrustAnchors(test_ca_cert_list_);
{
net::CertVerifyResult verify_result;
net::TestCompletionCallback callback;
net::CertVerifier::RequestHandle request_handle = NULL;
int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
EXPECT_EQ(net::OK, error);
}
EXPECT_TRUE(WasTrustAnchorUsedAndReset());
// Verifying after removing the trust anchors should now fail.
cert_verifier_->SetTrustAnchors(net::CertificateList());
{
net::CertVerifyResult verify_result;
net::TestCompletionCallback callback;
net::CertVerifier::RequestHandle request_handle = NULL;
int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
// Note: this hits the cached result from the first Verify() in this test.
EXPECT_EQ(net::ERR_CERT_AUTHORITY_INVALID, error);
}
// The additional trust anchors were reset, thus |cert_verifier_| should not
// signal it's usage anymore.
EXPECT_FALSE(WasTrustAnchorUsedAndReset());
}
} // namespace policy
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