Add Mac implementations of new SymmetricKey and Encryptor classes.

base/crypto/cssm_init.h

 // Copyright (c) 2009 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 BASE_CRYPTO_CSSM_INIT_H_
 #define BASE_CRYPTO_CSSM_INIT_H_
 
 #include <Security/cssm.h>
 
 #include "base/logging.h"
 #include "base/scoped_ptr.h"
 
 namespace base {
 
 // Initialize CSSM if it isn't already initialized.  This must be called before
 // any other CSSM functions.  This function is thread-safe, and CSSM will only
 // ever be initialized once.  CSSM will be properly shut down on program exit.
 void EnsureCSSMInit();
 
+// Returns the shared CSP handle used by CSSM functions.
+CSSM_CSP_HANDLE GetSharedCSPHandle();
+
 // Set of pointers to memory function wrappers that are required for CSSM
 extern const CSSM_API_MEMORY_FUNCS kCssmMemoryFunctions;
 
+// Utility function to log an error message including the error name.
+void LogCSSMError(const char *function_name, CSSM_RETURN err);
+
 }  // namespace base
 
 #endif  // BASE_CRYPTO_CSSM_INIT_H_