Add unit tests for easyUnlockPrivate API - crypto methods

chromeos/dbus/fake_easy_unlock_client.h

Index: chromeos/dbus/fake_easy_unlock_client.h
diff --git a/chromeos/dbus/fake_easy_unlock_client.h b/chromeos/dbus/fake_easy_unlock_client.h
index ddb0b92abd3a3b7d8c1318a18991bb5334b1b2f4..dd9cc8d7024da0ceb50cef01e56d00875f4426cd 100644
--- a/chromeos/dbus/fake_easy_unlock_client.h
+++ b/chromeos/dbus/fake_easy_unlock_client.h
@@ -14,6 +14,11 @@ 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();
 
@@ -24,7 +29,7 @@ class CHROMEOS_EXPORT FakeEasyUnlockClient : public EasyUnlockClient {
                                        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,
@@ -32,13 +37,15 @@ class CHROMEOS_EXPORT FakeEasyUnlockClient : public EasyUnlockClient {
                                    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);
 };