Add unit tests for easyUnlockPrivate API - crypto methods

chromeos/dbus/fake_easy_unlock_client.h

 // 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.
 
 #ifndef CHROMEOS_DBUS_FAKE_EASY_UNLOCK_CLIENT_H_
 #define CHROMEOS_DBUS_FAKE_EASY_UNLOCK_CLIENT_H_
 
 #include <string>
 
 #include "chromeos/dbus/easy_unlock_client.h"
 
 namespace chromeos {
 
 // A fake implemetation of EasyUnlockClient.
 class CHROMEOS_EXPORT FakeEasyUnlockClient : public EasyUnlockClient {
  public:
+  // Tests if the provided keys belong to the same (fake) EC P256 key pair
+  // generated by |this|.
+  static bool IsEcP256KeyPair(const std::string& private_key,
+                              const std::string& public_key);
+
   FakeEasyUnlockClient();
   virtual ~FakeEasyUnlockClient();
 
   // EasyUnlockClient overrides
   virtual void Init(dbus::Bus* bus) OVERRIDE;
   virtual void GenerateEcP256KeyPair(const KeyPairCallback& callback) OVERRIDE;
   virtual void PerformECDHKeyAgreement(const std::string& private_key,
                                        const std::string& public_key,
                                        const DataCallback& callback) OVERRIDE;
   virtual void CreateSecureMessage(const std::string& payload,
-                                   const std::string& secret_key,
+                                   const std::string& key,
                                    const std::string& associated_data,
                                    const std::string& public_metadata,
                                    const std::string& verification_key_id,
                                    const std::string& encryption_type,
                                    const std::string& signature_type,
                                    const DataCallback& callback) OVERRIDE;
   virtual void UnwrapSecureMessage(const std::string& message,
-                                   const std::string& secret_key,
+                                   const std::string& key,
                                    const std::string& associated_data,
                                    const std::string& encryption_type,
                                    const std::string& signature_type,
                                    const DataCallback& callback) OVERRIDE;
 
  private:
+  int generated_keys_count_;
+
   DISALLOW_COPY_AND_ASSIGN(FakeEasyUnlockClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_FAKE_EASY_UNLOCK_CLIENT_H_