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diff --git a/src/sha1.h b/src/sha1.h
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+/* sha1.h
+
+Copyright (c) 2005 Michael D. Leonhard
+
+http://tamale.net/
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+#ifndef SHA1_HEADER
+typedef unsigned int Uint32;
+
+class SHA1
+{
+	private:
+		// fields
+		Uint32 H0, H1, H2, H3, H4;
+		unsigned char bytes[64];
+		int unprocessedBytes;
+		Uint32 size;
+		void process();
+	public:
+		SHA1();
+		~SHA1();
+		void addBytes( const char* data, int num );
+		unsigned char* getDigest();
+		// utility methods
+		static Uint32 lrot( Uint32 x, int bits );
+		static void storeBigEndianUint32( unsigned char* byte, Uint32 num );
+		static void hexPrinter( unsigned char* c, int l );
+};
+
+#define SHA1_HEADER
+#endif