//rc6
BOOL CEncrypt::Rc6Encrypt(const char* szInDataBuff, uint32_t nInDataSize,
char* szOutDataBuff, uint32_t& nOutDataSize)
{
assert(m_stRc6Ctx.l_key[0] != 0);
assert(nOutDataSize >= ((nInDataSize + 15) / 16) * 16);
nOutDataSize = 0;
int nDataLen = nInDataSize - nInDataSize % 16;
while (nOutDataSize < nDataLen)
{
rc6_encrypt((const unsigned long *)(szInDataBuff + nOutDataSize),
(unsigned long *)(szOutDataBuff + nOutDataSize),&m_stRc6Ctx);
nOutDataSize += 16;
}
if (nDataLen < nInDataSize)
{
unsigned long llInBuff[4] = {0};
memcpy(llInBuff,szInDataBuff + nOutDataSize,nInDataSize % 16);
rc6_encrypt((const unsigned long *)llInBuff,
(unsigned long *)(szOutDataBuff + nOutDataSize),&m_stRc6Ctx);
nOutDataSize += 16;
}
return TRUE;
}
int main() //Driving function
{
char type[20],tmp[20];
unsigned int pt1[32],k;
int keylen,i;
unsigned char key[64],d1;
FILE *fp=fopen("input.txt","r");
fscanf(fp,"%s",type);
fscanf(fp,"%s",tmp);
for(i=0;i<16;i++)
{
fscanf(fp,"%x",&k);
pt[i]=k;
}
fscanf(fp,"%s",tmp);
i=0;
for(i=0;!feof(fp);i++)
{
fscanf(fp,"%x",&k);
key[i]=k;
}
keylen=i-1;
rc6_key(key, keylen);
pt1[3]=0;
int b=16;
for(i=b-1;i>=0;i--)
{
pt1[i/bytes]=(pt1[i/bytes]<<8)+pt[i];
}
if(strstr(type,"Encryption"))
rc6_encrypt(pt1);
else
rc6_decrypt(pt1);
return 0;
}