#include <stdio.h>
#include <QuickCrypt.h>
/* performs Blowfish encryption/decryption of memory buffer in ECB mode */
void EncryptDecryptBuffer( unsigned char* buff, const unsigned int numblocks, int dir, const unsigned char* key )
{
/* dir: SLC_ENCRYPT - perform encryption */
/* SLC_DECRYPT - perform decryption */
unsigned int i = 0;
/***** Initialize context ****************/
unsigned char context[SLC_BLOWFISH_CONTEXTSIZE];
SL_BLOWFISH_Init( context, dir, key, SLC_BLOWFISH_DEFAULTKEYSIZE );
/***** Encrypt/Decrypt memory buffer ****/
for( ; i < numblocks; ++i )
{
SL_BLOWFISH_ProcessBlock( context, buff + i * SLC_BLOWFISH_BLOCKSIZE, buff + i * SLC_BLOWFISH_BLOCKSIZE );
/* in-place encryption/decryption */
}
}
void ShowBuffer( const unsigned char* buff, const unsigned int numblocks );
int main()
{
/***** Define key & blocks ***************/
char key[SLC_BLOWFISH_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',
'*', '-', '*', '-', '*', '-', '*', '-'
};
const unsigned int NUM_BLOCKS = 3;
unsigned char blocks[24] = /* SLC_BLOWFISH_BLOCKSIZE * NUM_BLOCKS */
{
0xA6, 0x7E, 0x40, 0x80, 0x0F, 0xCF, 0x24, 0xC5,
0x8C, 0x5B, 0x3C, 0x42, 0xDE, 0xB1, 0x11, 0xA0,
0x97, 0xE9, 0xA7, 0x87, 0x99, 0x91, 0x1B, 0x3B
};
printf( "Initial blocks:\n" );
ShowBuffer( blocks, NUM_BLOCKS );
/***** Encrypt blocks ********************/
EncryptDecryptBuffer( blocks, NUM_BLOCKS, SLC_ENCRYPT, (const unsigned char*)key );
printf( "Encrypted blocks:\n" );
ShowBuffer( blocks, NUM_BLOCKS );
/***** Decrypt blocks ********************/
EncryptDecryptBuffer( blocks, NUM_BLOCKS, SLC_DECRYPT, (const unsigned char*)key );
printf( "Decrypted blocks:\n" );
ShowBuffer( blocks, NUM_BLOCKS );
return 0;
}
void ShowBuffer( const unsigned char* buff, const unsigned int numblocks )
{
unsigned int i = 0;
for( ; i < numblocks; ++i )
{
unsigned int j = 0;
for( ; j < SLC_BLOWFISH_BLOCKSIZE; ++j )
{
printf( "%.2x ", (int)buff[ i * SLC_BLOWFISH_BLOCKSIZE + j ] );
}
printf( "\n" );
}
} |