int main(int argc, char **argv)
{
unsigned char destmp[TXTSIZ], desptx[TXTSIZ], desctx[TXTSIZ], deskey[8];
int i;
/*****************************************************************************
* Encipher some data using DES in CBC mode. *
*****************************************************************************/
fprintf(stdout, "Enciphering with DES in CBC mode\n");
deskey[0] = 0x01;
deskey[1] = 0xf1;
deskey[2] = 0x23;
deskey[3] = 0x4a;
deskey[4] = 0x1f;
deskey[5] = 0x22;
deskey[6] = 0x00;
deskey[7] = 0xee;
for (i = 0; i < TXTSIZ; i++)
destmp[i] = (i * 23) % 256;
cbc_encipher(destmp, desctx, deskey, TXTSIZ);
cbc_decipher(desctx, desptx, deskey, TXTSIZ);
fprintf(stdout, "deskey: %02x %02x %02x %02x %02x %02x %02x %02x\n",
deskey[0], deskey[1], deskey[2], deskey[3], deskey[4],
deskey[5], deskey[6], deskey[7]);
for (i = 0; i < TXTSIZ; i++) {
if (destmp[i] == desptx[i])
fprintf(stdout,
"destmp[%03d]=%02x, desctx[%03d]=%02x, desptx[%03d]="
"%02x (OK)\n", i, destmp[i], i, desctx[i], i,
desptx[i]);
else
fprintf(stdout,
"destmp[%03d]=%02x, desctx[%03d]=%02x, desptx[%03d]="
"%02x (ERROR)\n", i, destmp[i], i, desctx[i], i,
desptx[i]);
}
return 0;
}
int main() {
int size = 16, i;
char plaintext[] = "hello world, thi";
char ciphertext[size], deciphered[size];
char key[8] = "abcdefgh";
printf("plaintext = '%s', hex:\n", plaintext);
hex_dump(plaintext, size);
printf("\n\n");
cbc_encipher(plaintext, ciphertext, key, size);
printf("ciphertext = '%s', hex:\n", ciphertext);
hex_dump(ciphertext, size);
printf("\n\n");
cbc_decipher(ciphertext, deciphered, key, size);
printf("deciphered = '%s', hex:\n", deciphered);
hex_dump(deciphered, size);
printf("\n\n");
return 0;
}
