Introduce unit test for NSS OCSP/AIA fetching

net/ocsp/nss_ocsp_unittest.cc

+// Copyright (c) 2013 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/ocsp/nss_ocsp.h"
+
+#include <string>
+
+#include "base/file_util.h"
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "net/base/net_errors.h"
+#include "net/base/test_completion_callback.h"
+#include "net/base/test_data_directory.h"
+#include "net/cert/cert_status_flags.h"
+#include "net/cert/cert_verifier.h"
+#include "net/cert/cert_verify_proc.h"
+#include "net/cert/cert_verify_proc_nss.h"
+#include "net/cert/cert_verify_result.h"
+#include "net/cert/multi_threaded_cert_verifier.h"
+#include "net/cert/test_root_certs.h"
+#include "net/cert/x509_certificate.h"
+#include "net/test/cert_test_util.h"
+#include "net/url_request/url_request_filter.h"
+#include "net/url_request/url_request_test_job.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+namespace {
+
+// Matches the caIssuers hostname from the generated certificate.
+const char kAiaHost[] = "aia-test.invalid";
+// Returning a single DER-encoded cert, so the mime-type must be
+// application/pkix-cert per RFC 5280.
+const char kAiaHeaders[] = "HTTP/1.1 200 OK\0"
+                           "Content-type: application/pkix-cert\0"
+                           "\0";
+
+class AiaResponseHandler : public net::URLRequestJobFactory::ProtocolHandler {
+ public:
+  AiaResponseHandler(const std::string& headers, const std::string& cert_data)
+      : headers_(headers), cert_data_(cert_data), request_count_(0) {}
+  virtual ~AiaResponseHandler() {}
+
+  // net::URLRequestJobFactory::ProtocolHandler implementation:
+  virtual net::URLRequestJob* MaybeCreateJob(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate) const OVERRIDE {
+    ++const_cast<AiaResponseHandler*>(this)->request_count_;
+
+    return new net::URLRequestTestJob(
+        request, network_delegate, headers_, cert_data_, true);
+  }
+
+  int request_count() const { return request_count_; }
+
+ private:
+  std::string headers_;
+  std::string cert_data_;
+  int request_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(AiaResponseHandler);
+};
+
+}  // namespace
+
+class NssHttpTest : public ::testing::Test {
+ public:
+  NssHttpTest()
+      : context_(false),
+        handler_(NULL),
+        verify_proc_(new CertVerifyProcNSS),
+        verifier_(new MultiThreadedCertVerifier(verify_proc_)) {
+  }
+  virtual ~NssHttpTest() {}
+
+  virtual void SetUp() {
+    std::string file_contents;
+    ASSERT_TRUE(file_util::ReadFileToString(
+        GetTestCertsDirectory().AppendASCII("aia-intermediate.der"),
+        &file_contents));
+    ASSERT_FALSE(file_contents.empty());
+
+    // Ownership of |handler| is transferred to the URLRequestFilter, but
+    // hold onto the original pointer in order to access |request_count()|.
+    scoped_ptr<AiaResponseHandler> handler(
+        new AiaResponseHandler(kAiaHeaders, file_contents));
+    handler_ = handler.get();
+
+    URLRequestFilter::GetInstance()->AddHostnameProtocolHandler(
+        "http",
+        kAiaHost,
+        handler.PassAs<URLRequestJobFactory::ProtocolHandler>());
+
+    SetURLRequestContextForNSSHttpIO(&context_);
+    EnsureNSSHttpIOInit();
+  }
+
+  virtual void TearDown() {
+    ShutdownNSSHttpIO();
+
+    if (handler_)
+      URLRequestFilter::GetInstance()->RemoveHostnameHandler("http", kAiaHost);
+  }
+
+  CertVerifier* verifier() const {
+    return verifier_.get();
+  }
+
+  int request_count() const {
+    return handler_->request_count();
+  }
+
+ protected:
+  const CertificateList empty_cert_list_;
+
+ private:
+  TestURLRequestContext context_;
+  AiaResponseHandler* handler_;
+  scoped_refptr<CertVerifyProc> verify_proc_;
+  scoped_ptr<CertVerifier> verifier_;
+};
+
+// Tests that when using NSS to verify certificates, and IO is enabled,
+// that a request to fetch missing intermediate certificates is
+// made successfully.
+TEST_F(NssHttpTest, TestAia) {
+  scoped_refptr<X509Certificate> test_cert(
+      ImportCertFromFile(GetTestCertsDirectory(), "aia-cert.pem"));
+  ASSERT_TRUE(test_cert.get());
+
+  scoped_refptr<X509Certificate> test_root(
+      ImportCertFromFile(GetTestCertsDirectory(), "aia-root.pem"));
+  ASSERT_TRUE(test_root.get());
+
+  ScopedTestRoot scoped_root(test_root);
+
+  CertVerifyResult verify_result;
+  TestCompletionCallback test_callback;
+  CertVerifier::RequestHandle request_handle;
+
+  int flags = CertVerifier::VERIFY_CERT_IO_ENABLED;
+  int error = verifier()->Verify(test_cert, "aia-host.invalid", flags, NULL,
+                                 &verify_result, test_callback.callback(),
+                                 &request_handle, BoundNetLog());
+  ASSERT_EQ(ERR_IO_PENDING, error);
+
+  error = test_callback.WaitForResult();
+
+  EXPECT_EQ(OK, error);
+
+  // Ensure that NSS made an AIA request for the missing intermediate.
+  EXPECT_LT(0, request_count());
+}
+
+}  // namespace net