Cleanup

src/plugin/PluginSha1.cpp

-/*
-100% free public domain implementation of the SHA-1 algorithm
-by Dominik Reichl <dominik.reichl@t-online.de>
-Web: http://www.dominik-reichl.de/
-
-See header file for version history.
-*/
-
-// If compiling with MFC, you might want to add #include "StdAfx.h"
-
-#include "PluginStdAfx.h"
-
-#define _CRT_SECURE_NO_WARNINGS
-#include "PluginSha1.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* pbData, UINT_32 uLen)
-{
-  UINT_32 j = ((m_count[0] >> 3) & 0x3F);
-
-  if((m_count[0] += (uLen << 3)) < (uLen << 3))
-    ++m_count[1]; // Overflow
-
-  m_count[1] += (uLen >> 29);
-
-  UINT_32 i;
-  if((j + uLen) > 63)
-  {
-    i = 64 - j;
-    memcpy(&m_buffer[j], pbData, i);
-    Transform(m_state, m_buffer);
-
-    for( ; (i + 63) < uLen; i += 64)
-      Transform(m_state, &pbData[i]);
-
-    j = 0;
-  }
-  else i = 0;
-
-  if((uLen - i) != 0)
-    memcpy(&m_buffer[j], &pbData[i], uLen - i);
-}
-
-#ifdef SHA1_UTILITY_FUNCTIONS
-// Hash in file contents
-bool CSHA1::HashFile(const TCHAR* tszFileName)
-{
-  if(tszFileName == NULL) return false;
-
-  FILE* fpIn = _tfopen(tszFileName, _T("rb"));
-  if(fpIn == NULL) return false;
-
-  _fseeki64(fpIn, 0, SEEK_END);
-  const INT_64 lFileSize = _ftelli64(fpIn);
-  _fseeki64(fpIn, 0, SEEK_SET);
-
-  const INT_64 lMaxBuf = SHA1_MAX_FILE_BUFFER;
-  UINT_8 vData[SHA1_MAX_FILE_BUFFER];
-  INT_64 lRemaining = lFileSize;
-
-  while(lRemaining > 0)
-  {
-    const size_t uMaxRead = static_cast<size_t>((lRemaining > lMaxBuf) ?
-lMaxBuf : lRemaining);
-
-    const size_t uRead = fread(vData, 1, uMaxRead, fpIn);
-    if(uRead == 0)
-    {
-      fclose(fpIn);
-      return false;
-    }
-
-    Update(vData, static_cast<UINT_32>(uRead));
-
-    lRemaining -= static_cast<INT_64>(uRead);
-  }
-
-  fclose(fpIn);
-  return (lRemaining == 0);
-}
-#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);
-
-  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)) & 0xFF);
-
-  // 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
-bool CSHA1::ReportHash(TCHAR* tszReport, REPORT_TYPE rtReportType) const
-{
-  if(tszReport == NULL) return false;
-
-  TCHAR tszTemp[16];
-
-  if((rtReportType == REPORT_HEX) || (rtReportType == REPORT_HEX_SHORT))
-  {
-    _sntprintf(tszTemp, 15, _T("%02X"), m_digest[0]);
-    _tcscpy(tszReport, tszTemp);
-
-    const TCHAR* lpFmt = ((rtReportType == REPORT_HEX) ? _T(" %02X") : _T("%02X"));
-    for(size_t i = 1; i < 20; ++i)
-    {
-      _sntprintf(tszTemp, 15, lpFmt, m_digest[i]);
-      _tcscat(tszReport, tszTemp);
-    }
-  }
-  else if(rtReportType == REPORT_DIGIT)
-  {
-    _sntprintf(tszTemp, 15, _T("%u"), m_digest[0]);
-    _tcscpy(tszReport, tszTemp);
-
-    for(size_t i = 1; i < 20; ++i)
-    {
-      _sntprintf(tszTemp, 15, _T(" %u"), m_digest[i]);
-      _tcscat(tszReport, tszTemp);
-    }
-  }
-  else return false;
-
-  return true;
-}
-#endif
-
-#ifdef SHA1_STL_FUNCTIONS
-bool CSHA1::ReportHashStl(std::basic_string<TCHAR>& strOut, REPORT_TYPE rtReportType) const
-{
-  TCHAR tszOut[84];
-  const bool bResult = ReportHash(tszOut, rtReportType);
-  if(bResult) strOut = tszOut;
-  return bResult;
-}
-#endif
-
-// Get the raw message digest
-bool CSHA1::GetHash(UINT_8* pbDest) const
-{
-  if(pbDest == NULL) return false;
-  memcpy(pbDest, m_digest, 20);
-  return true;
-}