bool CDESEncry::DesryFile(char *szFilename)
{
std::locale::global(std::locale(""));
FILE *ff;
char inbuff[8],outbuff[8];
ff = fopen(szFilename, "rb");
if(ff==NULL)
{
//std::string szInFile = CMarkup::UTF8ToGB2312(szFilename);
ff = fopen(szFilename, "rb");
if (NULL == ff)
{
return false;
}
}
int fsize;
fread(&fsize,sizeof(int),1,ff); //获得明文文件大小
int nTotalsize = fsize;
fsize = fsize%8 ? (fsize/8+1)*8 : fsize;
//fread(initbuff,sizeof(char),sizeof(initbuff),ff); //获得明文件的类型、加密重数、加密模式
m_pfileContent = (char*)malloc(sizeof(char)*fsize+1);
//开始解密
DES jm;
int nStart = 0;
while(fsize > 0) //请参考加密部分
{
int nRead = (int)fread(inbuff,sizeof(char),8,ff);
jm.Des_one(outbuff,inbuff,C_Key,DECRYPT);
if (fsize > 8)
{
memcpy(m_pfileContent + nStart, outbuff, 8);
nStart += 8;
}
else
{
memcpy(m_pfileContent + nStart, outbuff, fsize); //输出明文，不包括最后一个分组
nStart += nRead;
}
fsize -= nRead; //保存剩余尚未输出的明文大小
}
m_pfileContent[nTotalsize] = 0;
fclose(ff);
GetvecInfoPos();
return true;
}
bool CDESEncry::EncryString(char *szSource, char *szDest)
{
char inbuff[8],outbuff[8];
int nSourceLen = (int)strlen(szSource);
int nStart = 0;
DES jm;
while (nStart < nSourceLen)
{
memcpy(inbuff, szSource + nStart, sizeof(inbuff));
jm.Des_one(outbuff,inbuff,C_Key,ENCRYPT);
memcpy(szDest + nStart, outbuff, sizeof(outbuff));
nStart += sizeof(inbuff);
}
if (nSourceLen % 8 != 0)
{
nStart -= sizeof(inbuff);
memcpy(inbuff, szSource + nStart, nSourceLen - nStart);
jm.Des_one(outbuff,inbuff,C_Key,ENCRYPT);
memcpy(szDest + nStart, outbuff, nSourceLen - nStart);
}
return true;
}
bool CDESEncry::EncryFile(char *szFilename)
{
std::locale::global(std::locale(""));
std::string szInFile = szFilename;
FILE *ff, *fp;
ff = fopen(szFilename,"rb");
if (ff == NULL)
{
//szInFile = CMarkup::UTF8ToGB2312(szFilename);
ff = fopen(szInFile.c_str(),"rb");
if (ff == NULL)
{
return false;
}
}
std::string strOutFile = szInFile;
Transform_file(strOutFile, true);
fp = fopen(strOutFile.c_str(),"wb");
if (fp == NULL)
{
fclose(ff);
return false;
}
fseek(ff,0,SEEK_END);
int fsize=ftell(ff); //获得文件大小(相对于文件首的位移)
fseek(ff,0,SEEK_SET);
fwrite(&fsize,sizeof(int),1,fp); //写入文件大小
//fwrite(C_Key,sizeof(char),sizeof(C_Key),fp); //写入文件类型
//开始加密
int nRead;
DES jm;
char inbuff[8],outbuff[8];
while(!feof(ff))
{
nRead = fread(inbuff,sizeof(char),8,ff);
jm.Des_one(outbuff,inbuff,C_Key,ENCRYPT);
fwrite(outbuff,sizeof(char),8,fp); //输出分密文分组
}
fclose(fp);
fclose(ff);
return true;
}