shill: Infrastucture for encrypting/decrypting/scrambling store values.

This adds a CryptoProvider that registers and provides access to different
prioritized crypto modules (currently DES-CBC and ROT47). Use the provider in
KeyFileStore to provide an API for getting and setting crypted string values.

BUG=chromium-os:16963
TEST=unit tests

Change-Id: I492516890eb3f527758d354cd8890088cb99dea4
Reviewed-on: http://gerrit.chromium.org/gerrit/3395
Tested-by: Darin Petkov <petkov@chromium.org>
Reviewed-by: Chris Masone <cmasone@chromium.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/key_file_store.h b/key_file_store.h
index a9e28548..3e88de27 100644
--- a/key_file_store.h
+++ b/key_file_store.h
@@ -8,6 +8,7 @@
 #include <base/file_path.h>
 #include <gtest/gtest_prod.h>  // for FRIEND_TEST
 
+#include "shill/crypto_provider.h"
 #include "shill/glib.h"
 #include "shill/store_interface.h"
 
@@ -49,6 +50,12 @@ class KeyFileStore : public StoreInterface {
   virtual bool SetInt(const std::string &group,
                       const std::string &key,
                       int value);
+  virtual bool GetCryptedString(const std::string &group,
+                                const std::string &key,
+                                std::string *value);
+  virtual bool SetCryptedString(const std::string &group,
+                                const std::string &key,
+                                const std::string &value);
 
  private:
   FRIEND_TEST(KeyFileStoreTest, OpenClose);
@@ -57,8 +64,11 @@ class KeyFileStore : public StoreInterface {
   void ReleaseKeyFile();
 
   GLib *glib_;
+  CryptoProvider crypto_;
   GKeyFile *key_file_;
   FilePath path_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyFileStore);
 };
 
 }  // namespace shill