SHA1.h

Go to the documentation of this file.

/*
    100% free public domain implementation of the SHA-1 algorithm
    by Dominik Reichl <dominik.reichl@t-online.de>
    Web: http://www.dominik-reichl.de/
 
        This version is modified for Rigs of Rods project
        https://sourceforge.net/projects/rigsofrods/
 
    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
*/
 
#pragma once
 
#include "Application.h"
 
#include <stdint.h> //"pstdint.h" // Needed for uint32_t, uint8_t
 
#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
 
// Declare SHA1 workspace
 
typedef union
{
    uint8_t c[64];
    uint32_t l[16];
} SHA1_WORKSPACE_BLOCK;
 
namespace RoR {
 
class CSHA1
{
public:
 
    // Constructor and Destructor
    CSHA1();
    ~CSHA1();
 
    uint32_t m_state[5];
    uint32_t m_count[2];
    uint32_t __reserved1[1];
    uint8_t m_buffer[64];
    uint8_t m_digest[20];
    uint32_t __reserved2[3];
 
    void Reset();
 
    // Update the hash value
    void UpdateHash(uint8_t* data, uint32_t len);
 
    // Finalize hash and report
    void Final();
 
    // Report functions: as pre-formatted and raw data
#ifdef SHA1_UTILITY_FUNCTIONS
    std::string ReportHash();
#endif
    void GetHash(uint8_t* puDest);
 
private:
    // Private SHA-1 transformation
    void Transform(uint32_t* state, uint8_t* buffer);
 
    // Member variables
    uint8_t m_workspace[64];
    SHA1_WORKSPACE_BLOCK* m_block; // SHA1 pointer to the byte array above
};
 
}; //namespace RoR