#include <iostream>
#include <QuickCrypt.h>
using namespace std;
using namespace QuickCrypt;
// performs Blowfish encryption/decryption of a portion of the memory buffer in Counter mode
void EncryptDecryptBufferPortion( unsigned char* buff, const unsigned int buffsize, const unsigned char* iv, const unsigned char* key )
{
//Instantiate CCounterMode object
CCounterMode<CBlowfish> cipher( iv, key );
//Encrypt/Decrypt the second half of the memory buffer
unsigned int pos = buffsize / 2;
cipher.Seek( pos );
cipher.Process( buff + pos, buff + pos, buffsize - pos ); //in-place encryption/decryption
}
void ShowBuffer( const unsigned char* buff, const unsigned int buffsize );
int main()
{
//Define key, iv, memory buffer
char key[CBlowfish::DEFAULTKEYSIZE] =
{
's', 'e', 'c', 'r', 'e', 't', 'l', 'y',
'9', '6', '7', '1', '2', '9', '2', '7',
'0', '1', '2', '2', '0', '0', '5', '7',
'*', '-', '*', '-', '*', '-', '*', '-',
'9', '6', '7', '1', '2', '9', '2', '7',
'0', '1', '2', '2', '0', '0', '5', '7',
'*', '-', '*', '-', '*', '-', '*', '-'
};
unsigned char iv[CBlowfish::BLOCKSIZE] =
{
0x41, 0x3E, 0xF0, 0xA1, 0xC6, 0x11, 0xE5, 0x50
};
unsigned char buff[] =
{
0xED, 0x39, 0x08, 0x1B, 0xCA, 0xBE, 0x94, 0xCC,
0xA2, 0x04, 0x5F, 0x0C, 0x94, 0xCC, 0xAD, 0xE6,
0x24, 0xCA, 0xFE, 0x33, 0xF9, 0x8B, 0x29, 0x1F,
0x8B, 0xE9, 0x63, 0x1A, 0x96, 0xD9, 0x75, 0xDA
};
unsigned int buffsize = sizeof( buff ) / sizeof( unsigned char );
cout.setf( ios::hex, ios::basefield );
cout << "Initial memory buffer:" << endl;
ShowBuffer( buff, buffsize );
//Encrypt memory buffer
EncryptDecryptBufferPortion( buff, buffsize, iv, (const unsigned char*)key );
cout << "Encrypted memory buffer:" << endl;
ShowBuffer( buff, buffsize );
//Decrypt memory buffer
EncryptDecryptBufferPortion( buff, buffsize, iv, (const unsigned char*)key );
cout << "Decrypted memory buffer:" << endl;
ShowBuffer( buff, buffsize );
return 0;
}
void ShowBuffer( const unsigned char* buff, const unsigned int buffsize )
{
for( int i = 0; i < buffsize; ++i )
{
cout.fill( '0' );
cout.width( 2 );
cout << (int)buff[ i ] << " ";
if( ( i + 1 ) % CBlowfish::BLOCKSIZE == 0 )
cout << endl;
}
cout << endl;
} |