static void
rc4_bench(void) {
uint8_t *enckey;
uint8_t match[32] = {0xDE, 0xAD, 0xBE, 0xAD,
0xDE, 0xAD, 0xBE, 0xAD,
0xDE, 0xAD, 0xBE, 0xAD,
0xDE, 0xAD, 0xBE, 0xAD,
0xDE, 0xAD, 0xBE, 0xAD,
0xDE, 0xAD, 0xBE, 0xAD,
0xDE, 0xAD, 0xBE, 0xAD,
0xDE, 0xAD, 0xBE, 0xAD};
uint8_t cipher[32] = {0xBE, 0xAD, 0xDE, 0xAD,
0xBE, 0xAD, 0xDE, 0xAD,
0xBE, 0xAD, 0xDE, 0xAD,
0xBE, 0xAD, 0xDE, 0xAD,
0xBE, 0xAD, 0xDE, 0xAD,
0xBE, 0xAD, 0xDE, 0xAD,
0xBE, 0xAD, 0xDE, 0xAD,
0xBE, 0xAD, 0xDE, 0xAD};
unsigned int nrprocessed = 0;
clock_t startTime, endTime;
enckey = calloc(16, sizeof(uint8_t));
alarm(BENCHINTERVAL);
startTime = clock();
while(!finished) {
rc4Match40b(enckey, cipher, match);
enckey[0]++;
nrprocessed++;
}
endTime = clock();
print_and_clean("RC4 (40, static):", nrprocessed, &startTime, &endTime);
setrc4DecryptMethod(40);
nrprocessed = 0;
alarm(BENCHINTERVAL);
startTime = clock();
while(!finished) {
rc4Decrypt(enckey, cipher, 3, match);
enckey[0]++;
nrprocessed++;
}
endTime = clock();
print_and_clean("RC4 (40, no check):", nrprocessed, &startTime, &endTime);
setrc4DecryptMethod(128);
nrprocessed = 0;
alarm(BENCHINTERVAL);
startTime = clock();
while(!finished) {
rc4Decrypt(enckey, cipher, 3, match);
enckey[0]++;
nrprocessed++;
}
endTime = clock();
print_and_clean("RC4 (128, no check):", nrprocessed, &startTime, &endTime);
free(enckey);
}
/** Checks if the rev2-password set up in encKeyWorkSpace is the correct one
and return true if it is and false otherwise.
*/
static bool isUserPasswordRev2(struct custom_salt *cs)
{
uint8_t enckey[16];
md5(cs->encKeyWorkSpace, cs->ekwlen, enckey);
return rc4Match40b(enckey, cs->e.u_string, pad);
}
bool runCrackRev2(struct custom_salt *cs, unsigned char *currPW)
{
uint8_t enckey[16];
unsigned int currPWLen;
currPWLen = strlen((const char *)currPW);
if(currPWLen > 32)
currPWLen = 32;
memcpy(currPW + currPWLen, pad, 32 - currPWLen);
md5(currPW, cs->ekwlen, enckey);
/* Algorithm 3.4 reversed */
if (rc4Match40b(enckey, cs->e.u_string, pad))
return true;
return false;
}
bool runCrackRev2_o(struct custom_salt *cs, unsigned char *currPW)
{
uint8_t enckey[16];
unsigned int currPWLen;
currPWLen = strlen((const char *)currPW);
if(currPWLen > 32)
currPWLen = 32;
memcpy(currPW + currPWLen, pad, 32 - currPWLen);
md5(currPW, 32, enckey);
rc4Decrypt(enckey, cs->e.o_string, 32, currPW);
md5(currPW, cs->ekwlen, enckey);
if (rc4Match40b(enckey, cs->e.u_string, pad)) {
memcpy(cs->password_user, cs->encKeyWorkSpace, 32);
return true;
}
return false;
}
