MFC编写的MD5计算程序

///////////////////////////////////////////////////////////////////// //md5.cpp ///// #include "StdAfx.h" #include "md5.h" #include <conio.h> #include <stdexcept> using namespace std; const ULONG CMd5::Context[4]={ 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476 }; /* const ULONG CMd5::Context[4]= {0X01234567, 0X89abcdef, 0Xfedcba98, 0X76543210 };*/ const LPSTR CMd5::ErrInfo[5][2]={ {"",""}, {"The Memory is not enough !","内存分配失败!"}, {"Have not assign a file !","未指定文件!"}, {"Have not assign the text !","未指定文本!"}, {"Have something wrong with MD5!","有错误发生!"}, }; //==========================<内联函数实现>========================================= ULONG CMd5::LRotate(ULONG Sdata,int nBit) { return (Sdata<<nBit)|(Sdata>>(32-nBit)); } ULONG CMd5::F(ULONG x,ULONG y,ULONG z) { return (x&y)|((~x)&z); } ULONG CMd5::G(ULONG x,ULONG y,ULONG z) { return (x&z)|(y&(~z)); } ULONG CMd5::H(ULONG x,ULONG y,ULONG z) { return x^y^z; } ULONG CMd5::I(ULONG x,ULONG y,ULONG z) { return y^(x|(~z)); } void CMd5::FF(ULONG &a,ULONG b,ULONG c,ULONG d,ULONG Msg,int nBit,ULONG Cnt) { a+=F(b,c,d)+Msg+(ULONG)Cnt; a=LRotate(a,nBit); a+=b; } void CMd5::GG(ULONG &a,ULONG b,ULONG c,ULONG d,ULONG Msg,int nBit,ULONG Cnt) { a+=G(b,c,d)+Msg+(ULONG)Cnt; a=LRotate(a,nBit); a+=b; } void CMd5::HH(ULONG &a,ULONG b,ULONG c,ULONG d,ULONG Msg,int nBit,ULONG Cnt) { a+=H(b,c,d)+Msg+(ULONG)Cnt; a=LRotate(a,nBit); a+=b; } void CMd5::II(ULONG &a,ULONG b,ULONG c,ULONG d,ULONG Msg,int nBit,ULONG Cnt) { a+=I(b,c,d)+Msg+(ULONG)Cnt; a=LRotate(a,nBit); a+=b; } //==========================<成员函数实现>====================================== CMd5::CMd5() { IsSuc=false; Pointer=NULL; memset(strErr,0,50); } CMd5::CMd5(char *filename) { IsSuc=false; Pointer=NULL; memset(strErr,0,50); TargetFile(filename); } CMd5::~CMd5() { if(Sfile.is_open())Sfile.close(); if(Pointer){delete[]Pointer; Pointer=NULL;} } LPCSTR CMd5::TargetFile(char *filename) { if(!Init())SetErr(1); static char temp[MAX_PATH]; strcpy(temp,fname); strcpy(fname,filename); CaculateFile(); return temp; } void CMd5::TargetStr(LPCSTR str) { if(!Init())SetErr(1); CaculateStr(str); } bool CMd5::Init() { *fname='\0'; IsSuc=true; *Digest='\0'; try{ Pointer=new BYTE[sizeof(ULONG)*16]; } catch(bad_alloc w) { Pointer=NULL; SetErr(1); } pM=(ULONG*)Pointer; FileLen=0; for(int i=0;i<4;i++) T[i]=Context[i]; return true; } bool CMd5::OpenFile() { Sfile.open(fname,ios::in|ios::nocreate|ios::binary); if(!Sfile) { SetErr(0); } return true; } bool CMd5::Read64Byte() { static bool rb=true; int n; if(!Sfile.eof()) { Sfile.read((char*)Pointer,sizeof(ULONG)*16); FileLen+=n=Sfile.gcount(); if(n<64) { char* p=(char*)Pointer+n; memset((void *)p,0,64-n); *p=(char)0x80; rb=false; if(n<56) { LONG64 *pt=(LONG64*)Pointer+7; *pt=FileLen*8; return false; } } return true; } else { memset(Pointer,0,64); if(rb)*(char*)Pointer=(char)0x80; LONG64 *pt=(LONG64 *)Pointer+7; *pt=FileLen*8; return false; } } void CMd5::TransForm() { MSG msg; while(PeekMessage(&msg,NULL,0,0,PM_REMOVE)) { TranslateMessage(&msg); DispatchMessage(&msg); } ULONG a=T[0],b=T[1],c=T[2],d=T[3]; //第一轮--------------------------------> FF (a, b, c, d, pM[ 0], S11, 0xd76aa478); //- 1 - FF (d, a, b, c, pM[ 1], S12, 0xe8c7b756); //- 2 - FF (c, d, a, b, pM[ 2], S13, 0x242070db); //- 3 - FF (b, c, d, a, pM[ 3], S14, 0xc1bdceee); //- 4 - FF (a, b, c, d, pM[ 4], S11, 0xf57c0faf); //- 5 - FF (d, a, b, c, pM[ 5], S12, 0x4787c62a); //- 6 - FF (c, d, a, b, pM[ 6], S13, 0xa8304613); //- 7 - FF (b, c, d, a, pM[ 7], S14, 0xfd469501); //- 8 - FF (a, b, c, d, pM[ 8], S11, 0x698098d8); //- 9 - FF (d, a, b, c, pM[ 9], S12, 0x8b44f7af); //- 10 - FF (c, d, a, b, pM[10], S13, 0xffff5bb1); //- 11 - FF (b, c, d, a, pM[11], S14, 0x895cd7be); //- 12 - FF (a, b, c, d, pM[12], S11, 0x6b901122); //- 13 - FF (d, a, b, c, pM[13], S12, 0xfd987193); //- 14 - FF (c, d, a, b, pM[14], S13, 0xa679438e); //- 15 - FF (b, c, d, a, pM[15], S14, 0x49b40821); //- 16 - //第二轮---------------------------------> GG (a, b, c, d, pM[ 1], S21, 0xf61e2562); //- 17 - GG (d, a, b, c, pM[ 6], S22, 0xc040b340); //- 18 - GG (c, d, a, b, pM[11], S23, 0x265e5a51); //- 19 - GG (b, c, d, a, pM[ 0], S24, 0xe9b6c7aa); //- 20 - GG (a, b, c, d, pM[ 5], S21, 0xd62f105d); //- 21 - GG (d, a, b, c, pM[10], S22, 0x2441453); //- 22 - GG (c, d, a, b, pM[15], S23, 0xd8a1e681); //- 23 - GG (b, c, d, a, pM[ 4], S24, 0xe7d3fbc8); //- 24 - GG (a, b, c, d, pM[ 9], S21, 0x21e1cde6); //- 25 - GG (d, a, b, c, pM[14], S22, 0xc33707d6); //- 26 - GG (c, d, a, b, pM[ 3], S23, 0xf4d50d87); //- 27 - GG (b, c, d, a, pM[ 8], S24, 0x455a14ed); //- 28 - GG (a, b, c, d, pM[13], S21, 0xa9e3e905); //- 29 - GG (d, a, b, c, pM[ 2], S22, 0xfcefa3f8); //- 30 - GG (c, d, a, b, pM[ 7], S23, 0x676f02d9); //- 31 - GG (b, c, d, a, pM[12], S24, 0x8d2a4c8a); //- 32 - //第三轮---------------------------------> HH (a, b, c, d, pM[ 5], S31, 0xfffa3942); //- 33 - HH (d, a, b, c, pM[ 8], S32, 0x8771f681); //- 34 - HH (c, d, a, b, pM[11], S33, 0x6d9d6122); //- 35 - HH (b, c, d, a, pM[14], S34, 0xfde5380c); //- 36 - HH (a, b, c, d, pM[ 1], S31, 0xa4beea44); //- 37 - HH (d, a, b, c, pM[ 4], S32, 0x4bdecfa9); //- 38 - HH (c, d, a, b, pM[ 7], S33, 0xf6bb4b60); //- 39 - HH (b, c, d, a, pM[10], S34, 0xbebfbc70); //- 40 - HH (a, b, c, d, pM[13], S31, 0x289b7ec6); //- 41 - HH (d, a, b, c, pM[ 0], S32, 0xeaa127fa); //- 42 - HH (c, d, a, b, pM[ 3], S33, 0xd4ef3085); //- 43 - HH (b, c, d, a, pM[ 6], S34, 0x4881d05); //- 44 - HH (a, b, c, d, pM[ 9], S31, 0xd9d4d039); //- 45 - HH (d, a, b, c, pM[12], S32, 0xe6db99e5); //- 46 - HH (c, d, a, b, pM[15], S33, 0x1fa27cf8); //- 47 - HH (b, c, d, a, pM[ 2], S34, 0xc4ac5665); //- 48 - //第四轮--------------------------------> II (a, b, c, d, pM[ 0], S41, 0xf4292244); //- 49 - II (d, a, b, c, pM[ 7], S42, 0x432aff97); //- 50 - II (c, d, a, b, pM[14], S43, 0xab9423a7); //- 51 - II (b, c, d, a, pM[ 5], S44, 0xfc93a039); //- 52 - II (a, b, c, d, pM[12], S41, 0x655b59c3); //- 53 - II (d, a, b, c, pM[ 3], S42, 0x8f0ccc92); //- 54 - II (c, d, a, b, pM[10], S43, 0xffeff47d); //- 55 - II (b, c, d, a, pM[ 1], S44, 0x85845dd1); //- 56 - II (a, b, c, d, pM[ 8], S41, 0x6fa87e4f); //- 57 - II (d, a, b, c, pM[15], S42, 0xfe2ce6e0); //- 58 - II (c, d, a, b, pM[ 6], S43, 0xa3014314); //- 59 - II (b, c, d, a, pM[13], S44, 0x4e0811a1); //- 60 - II (a, b, c, d, pM[ 4], S41, 0xf7537e82); //- 61 - II (d, a, b, c, pM[11], S42, 0xbd3af235); //- 62 - II (c, d, a, b, pM[ 2], S43, 0x2ad7d2bb); //- 63 - II (b, c, d, a, pM[ 9], S44, 0xeb86d391); //- 64 - T[0]+=a; T[1]+=b; T[2]+=c; T[3]+=d; return ; } LPCSTR CMd5::GetDigestKey() { if(IsSuc) { return Digest; } SetErr(4); return NULL; } bool CMd5::CaculateFile() { if(*fname==0){ SetErr(2);return false;} if(!OpenFile()){SetErr(0);return false;} bool bl; do { bl=Read64Byte(); TransForm(); }while(bl); JustifytoStr(); return true; } bool CMd5::CaculateStr(LPCSTR str) { ULONG slen=strlen(str); ULONG n=slen/64,ntail=slen%64; for(int i=0;i<n;i++) { ULONG *p=(ULONG *)str; TransForm(); pM+=16; } memset(Pointer,0,64); memcpy(Pointer,str,ntail); UCHAR *pt=(UCHAR *)Pointer+ntail; *pt=0x80; LONG64 *pl=(LONG64 *)Pointer+7