Implement the signature verification API.

base/crypto/cssm_init.h

Index: base/crypto/cssm_init.h
===================================================================
--- base/crypto/cssm_init.h	(revision 0)
+++ base/crypto/cssm_init.h	(revision 0)
@@ -0,0 +1,17 @@
+// 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_
+
+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();
+
+}  // namespace base
+
+#endif  // BASE_CRYPTO_CSSM_INIT_H_