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