Make CertVerifier a pure virtual interface.

net/base/multi_threaded_cert_verifier.h

 // Copyright (c) 2012 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.
 
-#ifndef NET_BASE_CERT_VERIFIER_H_
-#define NET_BASE_CERT_VERIFIER_H_
+#ifndef NET_BASE_MULTI_THREADED_CERT_VERIFIER_H_
+#define NET_BASE_MULTI_THREADED_CERT_VERIFIER_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "net/base/cert_database.h"
+#include "net/base/cert_verifier.h"
 #include "net/base/cert_verify_result.h"
 #include "net/base/completion_callback.h"
 #include "net/base/expiring_cache.h"
 #include "net/base/net_export.h"
 #include "net/base/x509_cert_types.h"
 
 namespace net {
 
-class BoundNetLog;
 class CertVerifierJob;
+class CertVerifierRequest;
 class CertVerifierWorker;
-class CRLSet;
-class X509Certificate;
 
-// CertVerifier represents a service for verifying certificates.
-//
-// CertVerifier can handle multiple requests at a time, so when canceling a
-// request the RequestHandle that was returned by Verify() needs to be
-// given.  A simpler alternative for consumers that only have 1 outstanding
-// request at a time is to create a SingleRequestCertVerifier wrapper around
-// CertVerifier (which will automatically cancel the single request when it
-// goes out of scope).
-class NET_EXPORT CertVerifier : NON_EXPORTED_BASE(public base::NonThreadSafe),
-                                public CertDatabase::Observer {
+// MultiThreadedCertVerifier is a CertVerifier implementation that runs
+// synchronous CertVerifier implementations on worker threads.
+class NET_EXPORT MultiThreadedCertVerifier :
+    public CertVerifier,
+    NON_EXPORTED_BASE(public base::NonThreadSafe),
+    public CertDatabase::Observer {
  public:
-  // Opaque type used to cancel a request.
-  typedef void* RequestHandle;
-
-  CertVerifier();
+  MultiThreadedCertVerifier();
 
   // When the verifier is destroyed, all certificate verifications requests are
   // canceled, and their completion callbacks will not be called.
-  virtual ~CertVerifier();
+  virtual ~MultiThreadedCertVerifier();
 
-  // Verifies the given certificate against the given hostname.  Returns OK if
-  // successful or an error code upon failure.
-  //
-  // The |*verify_result| structure, including the |verify_result->cert_status|
-  // bitmask, is always filled out regardless of the return value.  If the
-  // certificate has multiple errors, the corresponding status flags are set in
-  // |verify_result->cert_status|, and the error code for the most serious
-  // error is returned.
-  //
-  // |flags| is bitwise OR'd of X509Certificate::VerifyFlags.
-  // If VERIFY_REV_CHECKING_ENABLED is set in |flags|, certificate revocation
-  // checking is performed.
-  //
-  // If VERIFY_EV_CERT is set in |flags| too, EV certificate verification is
-  // performed.  If |flags| is VERIFY_EV_CERT (that is,
-  // VERIFY_REV_CHECKING_ENABLED is not set), EV certificate verification will
-  // not be performed.
-  //
-  // |crl_set| points to an optional CRLSet structure which can be used to
-  // avoid revocation checks over the network.
-  //
-  // |callback| must not be null.  ERR_IO_PENDING is returned if the operation
-  // could not be completed synchronously, in which case the result code will
-  // be passed to the callback when available.
-  //
-  // If |out_req| is non-NULL, then |*out_req| will be filled with a handle to
-  // the async request. This handle is not valid after the request has
-  // completed.
-  int Verify(X509Certificate* cert,
-             const std::string& hostname,
-             int flags,
-             CRLSet* crl_set,
-             CertVerifyResult* verify_result,
-             const CompletionCallback& callback,
-             RequestHandle* out_req,
-             const BoundNetLog& net_log);
+  // CertVerifier implementation
+  virtual int Verify(X509Certificate* cert,
+                     const std::string& hostname,
+                     int flags,
+                     CRLSet* crl_set,
+                     CertVerifyResult* verify_result,
+                     const CompletionCallback& callback,
+                     CertVerifier::RequestHandle* out_req,
+                     const BoundNetLog& net_log) OVERRIDE;
 
-  // Cancels the specified request. |req| is the handle returned by Verify().
-  // After a request is canceled, its completion callback will not be called.
-  void CancelRequest(RequestHandle req);
+  virtual void CancelRequest(CertVerifier::RequestHandle req) OVERRIDE;
 
  private:
   friend class CertVerifierWorker;  // Calls HandleResult.
   friend class CertVerifierRequest;
   friend class CertVerifierJob;
-  FRIEND_TEST_ALL_PREFIXES(CertVerifierTest, CacheHit);
-  FRIEND_TEST_ALL_PREFIXES(CertVerifierTest, DifferentCACerts);
-  FRIEND_TEST_ALL_PREFIXES(CertVerifierTest, InflightJoin);
-  FRIEND_TEST_ALL_PREFIXES(CertVerifierTest, CancelRequest);
-  FRIEND_TEST_ALL_PREFIXES(CertVerifierTest, RequestParamsComparators);
+  FRIEND_TEST_ALL_PREFIXES(MultiThreadedCertVerifierTest, CacheHit);
+  FRIEND_TEST_ALL_PREFIXES(MultiThreadedCertVerifierTest, DifferentCACerts);
+  FRIEND_TEST_ALL_PREFIXES(MultiThreadedCertVerifierTest, InflightJoin);
+  FRIEND_TEST_ALL_PREFIXES(MultiThreadedCertVerifierTest, CancelRequest);
+  FRIEND_TEST_ALL_PREFIXES(MultiThreadedCertVerifierTest,
+                           RequestParamsComparators);
 
   // Input parameters of a certificate verification request.
   struct RequestParams {
     RequestParams(const SHA1Fingerprint& cert_fingerprint_arg,
                   const SHA1Fingerprint& ca_fingerprint_arg,
                   const std::string& hostname_arg,
                   int flags_arg)
         : cert_fingerprint(cert_fingerprint_arg),
           ca_fingerprint(ca_fingerprint_arg),
           hostname(hostname_arg),
@@ skipping 52 matching lines @@
   CertVerifierCache cache_;
 
   // inflight_ maps from a request to an active verification which is taking
   // place.
   std::map<RequestParams, CertVerifierJob*> inflight_;
 
   uint64 requests_;
   uint64 cache_hits_;
   uint64 inflight_joins_;
 
-  DISALLOW_COPY_AND_ASSIGN(CertVerifier);
-};
-
-// This class represents the task of verifying a certificate.  It wraps
-// CertVerifier to verify only a single certificate at a time and cancels this
-// request when going out of scope.
-class SingleRequestCertVerifier {
- public:
-  // |cert_verifier| must remain valid for the lifetime of |this|.
-  explicit SingleRequestCertVerifier(CertVerifier* cert_verifier);
-
-  // If a completion callback is pending when the verifier is destroyed, the
-  // certificate verification is canceled, and the completion callback will
-  // not be called.
-  ~SingleRequestCertVerifier();
-
-  // Verifies the given certificate, filling out the |verify_result| object
-  // upon success. See CertVerifier::Verify() for details.
-  int Verify(X509Certificate* cert,
-             const std::string& hostname,
-             int flags,
-             CRLSet* crl_set,
-             CertVerifyResult* verify_result,
-             const CompletionCallback& callback,
-             const BoundNetLog& net_log);
-
- private:
-  // Callback for when the request to |cert_verifier_| completes, so we
-  // dispatch to the user's callback.
-  void OnVerifyCompletion(int result);
-
-  // The actual certificate verifier that will handle the request.
-  CertVerifier* const cert_verifier_;
-
-  // The current request (if any).
-  CertVerifier::RequestHandle cur_request_;
-  CompletionCallback cur_request_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(SingleRequestCertVerifier);
+  DISALLOW_COPY_AND_ASSIGN(MultiThreadedCertVerifier);
 };
 
 }  // namespace net
 
-#endif  // NET_BASE_CERT_VERIFIER_H_
+#endif  // NET_BASE_MULTI_THREADED_CERT_VERIFIER_H_