- Borland C++ Builder Implemetierung des SHA1 Hash Algorithmus
- Dank an Dominik Reichl (http://www.dominik-reichl.de)
- Verwendung:
#include "sha1.h"
...
void __fastcall TfrmSHA1::btnSHA1StringClick(TObject *Sender)
{
char cHex[128];
memset(cHex, 0, sizeof(cHex));
CSHA1 sha1;
sha1.Reset();
sha1.Update((UINT_8 *)ledString->Text.c_str(), strlen(ledString->Text.c_str()));
sha1.Final();
sha1.ReportHash(cHex, CSHA1::REPORT_HEX);
ledHex->Text = cHex;
}
void __fastcall TfrmSHA1::btnSHA1FileClick(TObject *Sender)
{
char szFilename[255];
char szReport[1024];
bool bSuccess = false;
CSHA1 sha1;
strcpy(&szFilename[0], "testfile.exe");
szReport[0] = 0;
sha1.Reset();
bSuccess = sha1.HashFile(szFilename);
sha1.Final();
sha1.ReportHash(szReport, CSHA1::REPORT_HEX);
if (bSuccess) ledHex->Text = szReport;
else ledHex->Text = "Error.";
}
/*
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 1.7 - 2006-12-21
- Fixed buffer underrun warning which appeared when compiling with
Borland C Builder (thanks to Rex Bloom and Tim Gallagher for the
patch)
- Breaking change: ReportHash writes the final hash to the start
of the buffer, i.e. it's not appending it to the string any more
- Made some function parameters const
- Added Visual Studio 2005 project files to demo project
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 when 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> // Required for memset and memcpy
#ifdef SHA1_UTILITY_FUNCTIONS
#include <stdio.h> // Required for file access and sprintf
#include <string.h> // Required 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 // Compiling with Microsoft compiler
#define UINT_8 unsigned __int8
#define UINT_32 unsigned __int32
#else // !_MSC_VER
#define UINT_8 unsigned char
#if (ULONG_MAX == 0xFFFFFFFF)
#define UINT_32 unsigned long
#else
#define UINT_32 unsigned int
#endif
#endif // _MSC_VER
#endif // UINT_32
/////////////////////////////////////////////////////////////////////////////
// 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 m_reserved1[1]; // Memory alignment padding
UINT_8 m_buffer[64];
UINT_8 m_digest[20];
UINT_32 m_reserved2[3]; // Memory alignment padding
void Reset();
// Update the hash value
void Update(const UINT_8* pData, UINT_32 uLen);
#ifdef SHA1_UTILITY_FUNCTIONS
bool HashFile(const 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) const;
#endif
void GetHash(UINT_8* puDest) const;
private:
// Private SHA-1 transformation
void Transform(UINT_32* pState, const UINT_8* pBuffer);
// Member variables
UINT_8 m_workspace[64];
SHA1_WORKSPACE_BLOCK* m_block; // SHA1 pointer to the byte array above
};
#endif
/*
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 1.7 - 2006-12-21
- Fixed buffer underrun warning which appeared when compiling with
Borland C Builder (thanks to Rex Bloom and Tim Gallagher for the
patch)
- Breaking change: ReportHash writes the final hash to the start
of the buffer, i.e. it's not appending it to the string any more
- Made some function parameters const
- Added Visual Studio 2005 project files to demo project
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 when 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
*/
#include "SHA1.h"
#ifdef SHA1_UTILITY_FUNCTIONS
#define SHA1_MAX_FILE_BUFFER 8000
#endif
// Rotate x bits to the left
#ifndef ROL32
#ifdef _MSC_VER
#define ROL32(_val32, _nBits) _rotl(_val32, _nBits)
#else
#define ROL32(_val32, _nBits) (((_val32)<<(_nBits))|((_val32)>>32-(_nBits))))
#endif
#endif
#ifdef SHA1_LITTLE_ENDIAN
#define SHABLK0(i) (m_block->l[i] =
(ROL32(m_block->l[i],24) & 0xFF00FF00) | (ROL32(m_block->l[i],8) & 0x00FF00FF))
#else
#define SHABLK0(i) (m_block->l[i])
#endif
#define SHABLK(i) (m_block->l[i&15] = ROL32(m_block->l[(i+13)&15] ^ m_block->l[(i+8)&15]
^ m_block->l[(i+2)&15] ^ m_block->l[i&15],1))
// SHA-1 rounds
#define _R0(v,w,x,y,z,i) { z+=((w&(x^y))^y)+SHABLK0(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
#define _R1(v,w,x,y,z,i) { z+=((w&(x^y))^y)+SHABLK(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
#define _R2(v,w,x,y,z,i) { z+=(w^x^y)+SHABLK(i)+0x6ED9EBA1+ROL32(v,5); w=ROL32(w,30); }
#define _R3(v,w,x,y,z,i) { z+=(((w|x)&y)|(w&x))+SHABLK(i)+0x8F1BBCDC+ROL32(v,5); w=ROL32(w,30); }
#define _R4(v,w,x,y,z,i) { z+=(w^x^y)+SHABLK(i)+0xCA62C1D6+ROL32(v,5); w=ROL32(w,30); }
CSHA1::CSHA1()
{
m_block = (SHA1_WORKSPACE_BLOCK*)m_workspace;
Reset();
}
CSHA1::~CSHA1()
{
Reset();
}
void CSHA1::Reset()
{
// SHA1 initialization constants
m_state[0] = 0x67452301;
m_state[1] = 0xEFCDAB89;
m_state[2] = 0x98BADCFE;
m_state[3] = 0x10325476;
m_state[4] = 0xC3D2E1F0;
m_count[0] = 0;
m_count[1] = 0;
}
void CSHA1::Transform(UINT_32* pState, const UINT_8* pBuffer)
{
UINT_32 a = pState[0], b = pState[1], c = pState[2], d = pState[3], e = pState[4];
memcpy(m_block, pBuffer, 64);
// 4 rounds of 20 operations each. Loop unrolled.
_R0(a,b,c,d,e, 0); _R0(e,a,b,c,d, 1); _R0(d,e,a,b,c, 2); _R0(c,d,e,a,b, 3);
_R0(b,c,d,e,a, 4); _R0(a,b,c,d,e, 5); _R0(e,a,b,c,d, 6); _R0(d,e,a,b,c, 7);
_R0(c,d,e,a,b, 8); _R0(b,c,d,e,a, 9); _R0(a,b,c,d,e,10); _R0(e,a,b,c,d,11);
_R0(d,e,a,b,c,12); _R0(c,d,e,a,b,13); _R0(b,c,d,e,a,14); _R0(a,b,c,d,e,15);
_R1(e,a,b,c,d,16); _R1(d,e,a,b,c,17); _R1(c,d,e,a,b,18); _R1(b,c,d,e,a,19);
_R2(a,b,c,d,e,20); _R2(e,a,b,c,d,21); _R2(d,e,a,b,c,22); _R2(c,d,e,a,b,23);
_R2(b,c,d,e,a,24); _R2(a,b,c,d,e,25); _R2(e,a,b,c,d,26); _R2(d,e,a,b,c,27);
_R2(c,d,e,a,b,28); _R2(b,c,d,e,a,29); _R2(a,b,c,d,e,30); _R2(e,a,b,c,d,31);
_R2(d,e,a,b,c,32); _R2(c,d,e,a,b,33); _R2(b,c,d,e,a,34); _R2(a,b,c,d,e,35);
_R2(e,a,b,c,d,36); _R2(d,e,a,b,c,37); _R2(c,d,e,a,b,38); _R2(b,c,d,e,a,39);
_R3(a,b,c,d,e,40); _R3(e,a,b,c,d,41); _R3(d,e,a,b,c,42); _R3(c,d,e,a,b,43);
_R3(b,c,d,e,a,44); _R3(a,b,c,d,e,45); _R3(e,a,b,c,d,46); _R3(d,e,a,b,c,47);
_R3(c,d,e,a,b,48); _R3(b,c,d,e,a,49); _R3(a,b,c,d,e,50); _R3(e,a,b,c,d,51);
_R3(d,e,a,b,c,52); _R3(c,d,e,a,b,53); _R3(b,c,d,e,a,54); _R3(a,b,c,d,e,55);
_R3(e,a,b,c,d,56); _R3(d,e,a,b,c,57); _R3(c,d,e,a,b,58); _R3(b,c,d,e,a,59);
_R4(a,b,c,d,e,60); _R4(e,a,b,c,d,61); _R4(d,e,a,b,c,62); _R4(c,d,e,a,b,63);
_R4(b,c,d,e,a,64); _R4(a,b,c,d,e,65); _R4(e,a,b,c,d,66); _R4(d,e,a,b,c,67);
_R4(c,d,e,a,b,68); _R4(b,c,d,e,a,69); _R4(a,b,c,d,e,70); _R4(e,a,b,c,d,71);
_R4(d,e,a,b,c,72); _R4(c,d,e,a,b,73); _R4(b,c,d,e,a,74); _R4(a,b,c,d,e,75);
_R4(e,a,b,c,d,76); _R4(d,e,a,b,c,77); _R4(c,d,e,a,b,78); _R4(b,c,d,e,a,79);
// Add the working vars back into state
pState[0] += a;
pState[1] += b;
pState[2] += c;
pState[3] += d;
pState[4] += e;
// Wipe variables
#ifdef SHA1_WIPE_VARIABLES
a = b = c = d = e = 0;
#endif
}
// Use this function to hash in binary data and strings
void CSHA1::Update(const UINT_8* pData, UINT_32 uLen)
{
UINT_32 i, j;
j = (m_count[0] >> 3) & 63;
if((m_count[0] += (uLen << 3)) < (uLen << 3))
m_count[1]++;
m_count[1] += (uLen >> 29);
if((j + uLen) > 63)
{
i = 64 - j;
memcpy(&m_buffer[j], pData, i);
Transform(m_state, m_buffer);
for( ; (i + 63) < uLen; i += 64)
Transform(m_state, &pData[i]);
j = 0;
}
else i = 0;
if((uLen - i) != 0)
memcpy(&m_buffer[j], &pData[i], uLen - i);
}
#ifdef SHA1_UTILITY_FUNCTIONS
// Hash in file contents
bool CSHA1::HashFile(const char* szFileName)
{
unsigned long ulFileSize, ulRest, ulBlocks;
unsigned long i;
UINT_8 uData[SHA1_MAX_FILE_BUFFER];
FILE* fIn;
if(szFileName == NULL) return false;
fIn = fopen(szFileName, "rb");
if(fIn == NULL) return false;
fseek(fIn, 0, SEEK_END);
ulFileSize = (unsigned long)ftell(fIn);
fseek(fIn, 0, SEEK_SET);
if(ulFileSize != 0)
{
ulBlocks = ulFileSize / SHA1_MAX_FILE_BUFFER;
ulRest = ulFileSize % SHA1_MAX_FILE_BUFFER;
}
else
{
ulBlocks = 0;
ulRest = 0;
}
for(i = 0; i < ulBlocks; i++)
{
fread(uData, 1, SHA1_MAX_FILE_BUFFER, fIn);
Update((UINT_8*)uData, SHA1_MAX_FILE_BUFFER);
}
if(ulRest != 0)
{
fread(uData, 1, ulRest, fIn);
Update((UINT_8*)uData, ulRest);
}
fclose(fIn); fIn = NULL;
return true;
}
#endif
void CSHA1::Final()
{
UINT_32 i;
UINT_8 finalcount[8];
for(i = 0; i < 8; i++)
finalcount[i] = (UINT_8)((m_count[((i >= 4) ? 0 : 1)]
>> ((3 - (i & 3)) * 8) ) & 255); // Endian independent
Update((UINT_8*)"200", 1);
while ((m_count[0] & 504) != 448)
Update((UINT_8*)"0", 1); // vor die 0 muss noch ein Backslash!
Update(finalcount, 8); // Cause a SHA1Transform()
for(i = 0; i < 20; i++)
m_digest[i] = (UINT_8)((m_state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
// Wipe variables for security reasons
#ifdef SHA1_WIPE_VARIABLES
memset(m_buffer, 0, 64);
memset(m_state, 0, 20);
memset(m_count, 0, 8);
memset(finalcount, 0, 8);
Transform(m_state, m_buffer);
#endif
}
#ifdef SHA1_UTILITY_FUNCTIONS
// Get the final hash as a pre-formatted string
void CSHA1::ReportHash(char* szReport, unsigned char uReportType) const
{
unsigned char i;
char szTemp[16];
if(szReport == NULL) return;
if(uReportType == REPORT_HEX)
{
sprintf(szTemp, "%02X", m_digest[0]);
strcpy(szReport, szTemp);
for(i = 1; i < 20; i++)
{
sprintf(szTemp, " %02X", m_digest[i]);
strcat(szReport, szTemp);
}
}
else if(uReportType == REPORT_DIGIT)
{
sprintf(szTemp, "%u", m_digest[0]);
strcpy(szReport, szTemp);
for(i = 1; i < 20; i++)
{
sprintf(szTemp, " %u", m_digest[i]);
strcat(szReport, szTemp);
}
}
else strcpy(szReport, "Error: Unknown report type!");
}
#endif
// Get the raw message digest
void CSHA1::GetHash(UINT_8* puDest) const
{
memcpy(puDest, m_digest, 20);
}