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SHA1.h
148 lines (113 loc) · 3.7 KB
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SHA1.h
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/*
100% free public domain implementation of the SHA-1 algorithm
by Dominik Reichl <dominik.reichl@t-online.de>
Web: http://www.dominik-reichl.de/
Version 1.6 - 2005-02-07 (thanks to Howard Kapustein for patches)
- You can set the endianness in your files, no need to modify the
header file of the CSHA1 class any more
- Aligned data support
- Made support/compilation of the utility functions (ReportHash
and HashFile) optional (useful, if bytes count, for example in
embedded environments)
Version 1.5 - 2005-01-01
- 64-bit compiler compatibility added
- Made variable wiping optional (define SHA1_WIPE_VARIABLES)
- Removed unnecessary variable initializations
- ROL32 improvement for the Microsoft compiler (using _rotl)
======== Test Vectors (from FIPS PUB 180-1) ========
SHA1("abc") =
A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
SHA1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq") =
84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
SHA1(A million repetitions of "a") =
34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
*/
#ifndef ___SHA1_HDR___
#define ___SHA1_HDR___
#if !defined(SHA1_UTILITY_FUNCTIONS) && !defined(SHA1_NO_UTILITY_FUNCTIONS)
#define SHA1_UTILITY_FUNCTIONS
#endif
#include <memory.h> // Needed for memset and memcpy
#ifdef SHA1_UTILITY_FUNCTIONS
#include <stdio.h> // Needed for file access and sprintf
#include <string.h> // Needed for strcat and strcpy
#endif
#ifdef _MSC_VER
#include <stdlib.h>
#endif
// You can define the endian mode in your files, without modifying the SHA1
// source files. Just #define SHA1_LITTLE_ENDIAN or #define SHA1_BIG_ENDIAN
// in your files, before including the SHA1.h header file. If you don't
// define anything, the class defaults to little endian.
#if !defined(SHA1_LITTLE_ENDIAN) && !defined(SHA1_BIG_ENDIAN)
#define SHA1_LITTLE_ENDIAN
#endif
// Same here. If you want variable wiping, #define SHA1_WIPE_VARIABLES, if
// not, #define SHA1_NO_WIPE_VARIABLES. If you don't define anything, it
// defaults to wiping.
#if !defined(SHA1_WIPE_VARIABLES) && !defined(SHA1_NO_WIPE_VARIABLES)
#define SHA1_WIPE_VARIABLES
#endif
/////////////////////////////////////////////////////////////////////////////
// Define 8- and 32-bit variables
#ifndef UINT_32
#ifdef _MSC_VER
#define UINT_8 unsigned __int8
#define UINT_32 unsigned __int32
#else
#define UINT_8 unsigned char
#if (ULONG_MAX == 0xFFFFFFFF)
#define UINT_32 unsigned long
#else
#define UINT_32 unsigned int
#endif
#endif
#endif
/////////////////////////////////////////////////////////////////////////////
// Declare SHA1 workspace
typedef union
{
UINT_8 c[64];
UINT_32 l[16];
} SHA1_WORKSPACE_BLOCK;
class CSHA1
{
public:
#ifdef SHA1_UTILITY_FUNCTIONS
// Two different formats for ReportHash(...)
enum
{
REPORT_HEX = 0,
REPORT_DIGIT = 1
};
#endif
// Constructor and Destructor
CSHA1();
~CSHA1();
UINT_32 m_state[5];
UINT_32 m_count[2];
UINT_32 __reserved1[1];
UINT_8 m_buffer[64];
UINT_8 m_digest[20];
UINT_32 __reserved2[3];
void Reset();
// Update the hash value
void Update(UINT_8 *data, UINT_32 len);
#ifdef SHA1_UTILITY_FUNCTIONS
bool HashFile(char *szFileName);
#endif
// Finalize hash and report
void Final();
// Report functions: as pre-formatted and raw data
#ifdef SHA1_UTILITY_FUNCTIONS
void ReportHash(char *szReport, unsigned char uReportType = REPORT_HEX);
#endif
void GetHash(UINT_8 *puDest);
private:
// Private SHA-1 transformation
void Transform(UINT_32 *state, UINT_8 *buffer);
// Member variables
UINT_8 m_workspace[64];
SHA1_WORKSPACE_BLOCK *m_block; // SHA1 pointer to the byte array above
};
#endif