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