Refactoring key generation and export util code to make mocking possible.

chrome/browser/chromeos/login/owner_key_utils.h

+// Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_LOGIN_OWNER_KEY_UTILS_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_OWNER_KEY_UTILS_H_
+
+#include "base/basictypes.h"
+
+// Forward declarations of NSS data structures.
+struct SECKEYPrivateKeyStr;
+struct SECKEYPublicKeyStr;
+struct SECItemStr;
+
+typedef struct SECKEYPrivateKeyStr SECKEYPrivateKey;
+typedef struct SECKEYPublicKeyStr SECKEYPublicKey;
+typedef struct SECItemStr SECItem;
+
+class FilePath;
+
+class OwnerKeyUtils {
+ public:
+  class Factory {
+   public:
+    virtual OwnerKeyUtils* CreateOwnerKeyUtils() = 0;
+  };
+
+  OwnerKeyUtils();
+  virtual ~OwnerKeyUtils();
+
+  // Sets the factory used by the static method Create to create an
+  // OwnerKeyUtils.  OwnerKeyUtils does not take ownership of
+  // |factory|. A value of NULL results in an OwnerKeyUtils being
+  // created directly.
+#if defined(UNIT_TEST)
+  static void set_factory(Factory* factory) { factory_ = factory; }
+#endif
+
+  // Creates an OwnerKeyUtils, ownership returns to the caller. If there is no
+  // Factory (the default) this creates and returns a new OwnerKeyUtils.
+  static OwnerKeyUtils* Create();
+
+  // Generate a public/private RSA keypair and store them in the NSS database.
+  // The keys will be kKeySizeInBits in length (Recommend >= 2048 bits).
+  //
+  //  Returns false on error.
+  //
+  // The caller takes ownership of both objects, which are allocated by libnss.
+  // To free them, call
+  //    SECKEY_DestroyPrivateKey(*private_key_out);
+  //    SECKEY_DestroyPublicKey(*public_key_out);
+  virtual bool GenerateKeyPair(SECKEYPrivateKey** private_key_out,
+                               SECKEYPublicKey** public_key_out) = 0;
+
+  // DER encodes |key| and writes it out to |key_file|.
+  // The blob on disk is a DER-encoded X509 SubjectPublicKeyInfo object.
+  // Returns false on error.
+  virtual bool ExportPublicKey(SECKEYPublicKey* key,
+                               const FilePath& key_file) = 0;
+
+  // Assumes that the file at |key_file| exists.
+  // Caller takes ownership of returned object; returns NULL on error.
+  // To free, call SECKEY_DestroyPublicKey.
+  virtual SECKEYPublicKey* ImportPublicKey(const FilePath& key_file) = 0;
+
+ private:
+  static Factory* factory_;
+};
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_OWNER_KEY_UTILS_H_