73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
/*
|
|
* Copyright (C) 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
|
|
* Copyright (C) 2011,2015,2016 by Jonathan Naylor G4KLX
|
|
*
|
|
* 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
|
|
* (at your option) 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, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifndef SHA256_H
|
|
#define SHA256_H
|
|
|
|
#include <cstdint>
|
|
|
|
enum {
|
|
SHA256_DIGEST_SIZE = 256 / 8
|
|
};
|
|
|
|
class CSHA256 {
|
|
public:
|
|
CSHA256();
|
|
~CSHA256();
|
|
|
|
/* Starting with the result of former calls of this function (or the
|
|
initialization function update the context for the next LEN bytes
|
|
starting at BUFFER.
|
|
It is necessary that LEN is a multiple of 64!!! */
|
|
void processBlock(const unsigned char* buffer, unsigned int len);
|
|
|
|
/* Starting with the result of former calls of this function (or the
|
|
initialization function update the context for the next LEN bytes
|
|
starting at BUFFER.
|
|
It is NOT required that LEN is a multiple of 64. */
|
|
void processBytes(const unsigned char* buffer, unsigned int len);
|
|
|
|
/* Process the remaining bytes in the buffer and put result from CTX
|
|
in first 32 bytes following RESBUF. The result is always in little
|
|
endian byte order, so that a byte-wise output yields to the wanted
|
|
ASCII representation of the message digest. */
|
|
unsigned char* finish(unsigned char* resbuf);
|
|
|
|
/* Put result from CTX in first 32 bytes following RESBUF. The result is
|
|
always in little endian byte order, so that a byte-wise output yields
|
|
to the wanted ASCII representation of the message digest. */
|
|
unsigned char* read(unsigned char* resbuf);
|
|
|
|
/* Compute SHA256 message digest for LEN bytes beginning at BUFFER. The
|
|
result is always in little endian byte order, so that a byte-wise
|
|
output yields to the wanted ASCII representation of the message
|
|
digest. */
|
|
unsigned char* buffer(const unsigned char* buffer, unsigned int len, unsigned char* resblock);
|
|
|
|
private:
|
|
uint32_t* m_state;
|
|
uint32_t* m_total;
|
|
unsigned int m_buflen;
|
|
uint32_t* m_buffer;
|
|
|
|
void init();
|
|
void conclude();
|
|
};
|
|
|
|
#endif
|