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diff --git a/src/utils/sha256.h b/src/utils/sha256.h
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+++ b/src/utils/sha256.h
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+/*
+ *  The Mana Client
+ *  Copyright (C) 2007-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *
+ *  This file is part of The Mana Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef UTILS_SHA256_H
+#define UTILS_SHA256_H
+
+#include <string>
+
+/**
+ * Returns the SHA-256 hash for the given string.
+ *
+ * @param string the string to create the SHA-256 hash for
+ * @return the SHA-256 hash for the given string.
+ */
+std::string sha256(const std::string &string);
+
+#endif // UTILS_SHA256_H