the begginning

utils/funcexp/sha.h

@@ -0,0 +1,113 @@
+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   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; version 2 of
+   the License.
+
+   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, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+
+/*
+ *  @brief class SHA1
+ *
+ *  Copyright (C) 1998, 2009
+ *  Paul E. Jones <paulej@packetizer.com>
+
+ *  Freeware Public License (FPL)
+ *  
+ *  This software is licensed as "freeware."  Permission to distribute
+ *  this software in source and binary forms, including incorporation 
+ *  into other products, is hereby granted without a fee.  THIS SOFTWARE 
+ *  IS PROVIDED 'AS IS' AND WITHOUT ANY EXPRESSED OR IMPLIED WARRANTIES, 
+ *  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
+ *  AND FITNESS FOR A PARTICULAR PURPOSE.  THE AUTHOR SHALL NOT BE HELD 
+ *  LIABLE FOR ANY DAMAGES RESULTING FROM THE USE OF THIS SOFTWARE, EITHER 
+ *  DIRECTLY OR INDIRECTLY, INCLUDING, BUT NOT LIMITED TO, LOSS OF DATA 
+ *  OR DATA BEING RENDERED INACCURATE.
+ *
+ *
+ *  Description:
+ *      This class implements the Secure Hashing Standard as defined
+ *      in FIPS PUB 180-1 published April 17, 1995.
+ *
+ *      Many of the variable names in this class, especially the single
+ *      character names, were used because those were the names used
+ *      in the publication.
+ *
+ *      Please read the file sha1.cpp for more information.
+ *
+ */
+
+#ifndef _SHA1_H_
+#define _SHA1_H_
+
+namespace funcexp
+{
+class SHA1
+{
+	public:
+		SHA1();
+		virtual ~SHA1();
+
+		/*
+		 *  Re-initialize the class
+		 */
+		void Reset();
+
+		/*
+		 *  Returns the message digest
+		 */
+		bool Result(unsigned *message_digest_array);
+
+		/*
+		 *  Provide input to SHA1
+		 */
+		void Input( const unsigned char *message_array,
+		            unsigned            length);
+		void Input( const char  *message_array,
+		            unsigned    length);
+		void Input(unsigned char message_element);
+		void Input(char message_element);
+		SHA1& operator<<(const char *message_array);
+		SHA1& operator<<(const unsigned char *message_array);
+		SHA1& operator<<(const char message_element);
+		SHA1& operator<<(const unsigned char message_element);
+
+	private:
+		/*
+		 *  Process the next 512 bits of the message
+		 */
+		void ProcessMessageBlock();
+
+		/*
+		 *  Pads the current message block to 512 bits
+		 */
+		void PadMessage();
+
+		/*
+		 *  Performs a circular left shift operation
+		 */
+		inline unsigned CircularShift(int bits, unsigned word);
+
+		unsigned H[5];                      // Message digest buffers
+		unsigned Length_Low;                // Message length in bits
+		unsigned Length_High;               // Message length in bits
+	
+		unsigned char Message_Block[64];    // 512-bit message blocks
+		int Message_Block_Index;            // Index into message block array
+	
+		bool Computed;                      // Is the digest computed?
+		bool Corrupted;                     // Is the message digest corruped?
+};
+
+} //namespace
+
+#endif