Gave the GetOriginBoundCertificate an asynchronous interface because certificate

net/base/origin_bound_cert_service.temp.h

 // Copyright (c) 2011 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_ORIGIN_BOUND_CERT_SERVICE_H_
+#define NET_BASE_ORIGIN_BOUND_CERT_SERVICE_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/non_thread_safe.h"
-#include "base/time.h"
-#include "net/base/cert_database.h"
-#include "net/base/cert_verify_result.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_api.h"
-#include "net/base/x509_cert_types.h"
 
 namespace net {
 
-class CertVerifierJob;
-class CertVerifierWorker;
-class X509Certificate;
+class OriginBoundCertServiceJob;
+class OriginBoundCertServiceWorker;
+class OriginBoundCertStore;
 
-// CachedCertVerifyResult contains the result of a certificate verification.
-struct CachedCertVerifyResult {
-  CachedCertVerifyResult();
-  ~CachedCertVerifyResult();
-
-  // Returns true if |current_time| is greater than or equal to |expiry|.
-  bool HasExpired(base::Time current_time) const;
-
-  int error;  // The return value of CertVerifier::Verify.
-  CertVerifyResult result;  // The output of CertVerifier::Verify.
-
-  // The time at which the certificate verification result expires.
-  base::Time expiry;
-};
-
-// 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_API CertVerifier : NON_EXPORTED_BASE(public base::NonThreadSafe),
-                             public CertDatabase::Observer {
+// A class for creating and fetching origin bound certs.
+// Inherits from NonThreadSafe in order to use the function
+// |CalledOnValidThread|.
+class NET_API OriginBoundCertService
+    : public base::RefCountedThreadSafe<OriginBoundCertService>,
+      NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
   // Opaque type used to cancel a request.
   typedef void* RequestHandle;
 
-  // CertVerifier must not call base::Time::Now() directly.  It must call
-  // time_service_->Now().  This allows unit tests to mock the current time.
-  class TimeService {
-   public:
-    virtual ~TimeService() {}
+  // This object owns origin_bound_cert_store.
+  explicit OriginBoundCertService(
+      OriginBoundCertStore* origin_bound_cert_store);
 
-    virtual base::Time Now() = 0;
-  };
+  ~OriginBoundCertService();
 
-  CertVerifier();
-
-  // Used by unit tests to mock the current time.  Takes ownership of
-  // |time_service|.
-  explicit CertVerifier(TimeService* time_service);
-
-  // When the verifier is destroyed, all certificate verifications requests are
-  // canceled, and their completion callbacks will not be called.
-  virtual ~CertVerifier();
-
-  // 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.
-  //
-  // |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,
-             CertVerifyResult* verify_result,
-             CompletionCallback* callback,
-             RequestHandle* out_req);
+  // TODO(rkn): Specify certificate type (RSA or DSA).
+  // Fetches the origin bound cert for the specified origin if one exists
+  // and creates one otherwise. On success, |private_key_result| stores a
+  // DER-encoded PrivateKeyInfo struct, and |cert_result| stores a DER-encoded
+  // certificate.
+  int GetOriginBoundCert(const std::string& origin,
+                         std::string* private_key,
+                         std::string* cert,
+                         CompletionCallback* callback,
+                         RequestHandle* out_req);
 
   // 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);
 
-  // Clears the verification result cache.
-  void ClearCache();
-
-  size_t GetCacheSize() const;
-
+  // Public only for unit testing.
+  int GetCertCount();
   uint64 requests() const { return requests_; }
-  uint64 cache_hits() const { return cache_hits_; }
-  uint64 inflight_joins() const { return inflight_joins_; }
+  uint64 cache_hits() const {return cache_hits_; }
+  uint64 inflight_joins() const {return inflight_joins_; }
 
  private:
-  friend class CertVerifierWorker;  // Calls HandleResult.
+  friend class OriginBoundCertServiceWorker;  // Calls HandleResult.
 
-  // Input parameters of a certificate verification request.
-  struct RequestParams {
-    bool operator==(const RequestParams& other) const {
-      // |flags| is compared before |cert_fingerprint| and |hostname| under
-      // assumption that integer comparisons are faster than memory and string
-      // comparisons.
-      return (flags == other.flags &&
-              memcmp(cert_fingerprint.data, other.cert_fingerprint.data,
-                     sizeof(cert_fingerprint.data)) == 0 &&
-              hostname == other.hostname);
-    }
+  // On success, |private_key_result| stores a DER-encoded PrivateKeyInfo
+  // struct, and |cert_result| stores a DER-encoded certificate. Returns
+  // OK if successful and ERR_FAILED otherwise.
+  // |serial_number| is passed in because it is created with the function
+  // base::RandInt, which opens the file /dev/urandom, which cannot be done on
+  // a worker thread.
+  int GenerateCert(const std::string& origin,
+                   uint32 serial_number,
+                   std::string* private_key,
+                   std::string* cert);
 
-    bool operator<(const RequestParams& other) const {
-      // |flags| is compared before |cert_fingerprint| and |hostname| under
-      // assumption that integer comparisons are faster than memory and string
-      // comparisons.
-      if (flags != other.flags)
-        return flags < other.flags;
-      int rv = memcmp(cert_fingerprint.data, other.cert_fingerprint.data,
-                      sizeof(cert_fingerprint.data));
-      if (rv != 0)
-        return rv < 0;
-      return hostname < other.hostname;
-    }
+  void HandleResult(const std::string& origin,
+                    int error,
+                    const std::string& private_key,
+                    const std::string& cert);
 
-    SHA1Fingerprint cert_fingerprint;
-    std::string hostname;
-    int flags;
-  };
+  scoped_ptr<OriginBoundCertStore> origin_bound_cert_store_;
 
-  void HandleResult(X509Certificate* cert,
-                    const std::string& hostname,
-                    int flags,
-                    int error,
-                    const CertVerifyResult& verify_result);
-
-  // CertDatabase::Observer methods:
-  virtual void OnCertTrustChanged(const X509Certificate* cert);
-
-  // cache_ maps from a request to a cached result. The cached result may
-  // have expired and the size of |cache_| must be <= kMaxCacheEntries.
-  std::map<RequestParams, CachedCertVerifyResult> cache_;
-
-  // inflight_ maps from a request to an active verification which is taking
+  // inflight_ maps from an origin to an active generation which is taking
   // place.
-  std::map<RequestParams, CertVerifierJob*> inflight_;
-
-  scoped_ptr<TimeService> time_service_;
+  std::map<std::string, OriginBoundCertServiceJob*> 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,
-             CertVerifyResult* verify_result,
-             CompletionCallback* callback);
-
- 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_;
-
-  // Completion callback for when request to |cert_verifier_| completes.
-  CompletionCallbackImpl<SingleRequestCertVerifier> callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(SingleRequestCertVerifier);
+  DISALLOW_COPY_AND_ASSIGN(OriginBoundCertService);
 };
 
 }  // namespace net
 
-#endif  // NET_BASE_CERT_VERIFIER_H_
+#endif  // NET_BASE_ORIGIN_BOUND_CERT_SERVICE_H_