static int
findrev(Revlog *rl, char *name)
{
uchar hash[HASHSZ];
int n, i, rev;
char *s;
if(strcmp(name, "tip") == 0)
return rl->nmap-1;
rev = strtol(name, &s, 10);
if(s > name && (*s == 0 || ispunct(*s)))
return rev;
rev = -1;
if(s = strchr(name, '.'))
name = s+1;
if((n = hex2hash(name, hash)) > 0){
for(i=0; i<rl->nmap; i++){
if(memcmp(rl->map[i].hash, hash, n) == 0){
if(rev < 0)
rev = i;
else {
rev = -1;
break;
}
}
}
}
return rev;
}
int
readhash(char *path, char *name, uchar hash[])
{
char buf[MAXPATH], *p;
int n;
snprint(buf, sizeof(buf), "%s/%s", path, name);
readfile(buf, buf, sizeof(buf));
if(p = strchr(buf, '.'))
p++;
else
p = buf;
n = hex2hash(p, hash);
if(n != HASHSZ)
return -1;
return 0;
}
int main(int argc, char** argv)
{
if (argc == 1 || !strcmp(argv[1], "--help") || !strcmp(argv[1], "-h"))
{
usage(argc, argv);
exit(0);
}
else if (!strcmp(argv[1], "--version") || !strcmp(argv[1], "-v"))
{
printf("ltcrack\n");
printf("Compiled on %s at %s\n", __DATE__, __TIME__);
exit(0);
}
if (argc < 4)
{
usage(argc, argv);
exit(1);
}
Target ttype;
char* tstr = argv[1];
if (strcmp(tstr, "-x") == 0 || strcmp(tstr, "--hash") == 0)
ttype = T_HASH;
else if (strcmp(tstr, "-f") == 0 || strcmp(tstr, "--file") == 0)
ttype = T_FILE;
else if (strcmp(tstr, "-r") == 0 || strcmp(tstr, "--random") == 0)
ttype = T_RAND;
else
ERROR("Invalid target '%s'\n", tstr);
char* tparam = argv[2];
// load tables
n_lt = argc-3;
lt = malloc(sizeof(LTable) * n_lt);
assert(lt);
for (u32 i = 0; i < n_lt; i++)
if (!LTable_FromFile(<[i], argv[i+3]))
ERROR("Could no load table '%s'\n", argv[i+3])
// some parameters
u32 l_string = lt[0].l_string;
char* charset = lt[0].charset;
u32 n_charset = lt[0].n_charset;
// some buffers
char hash[16];
bufstr = malloc(l_string);
assert(bufstr);
// try and crack hash(es)
switch (ttype)
{
case T_HASH:
hex2hash(tparam, hash, 16);
if (reverseHash(hash))
{
printHash(hash, 16);
printf(" ");
printString(bufstr, l_string);
printf("\n");
}
else
printf("Could not reverse hash\n");
break;
case T_FILE:
(void) 0;
FILE* f = strcmp(tparam, "-") == 0 ? stdin : fopen(tparam, "r");
assert(f);
while (1)
{
char hashstr[33];
fread(hashstr, 1, 33, f);
if (feof(f))
break;
hex2hash(hashstr, hash, 16);
if (reverseHash(hash))
{
printHash(hash, 16);
printf(" ");
printString(bufstr, l_string);
printf("\n");
}
else
printf("Could not reverse hash\n");
}
fclose(f);
break;
case T_RAND:
srandom(time(NULL));
u32 n = atoi(tparam);
u32 n_crack = 0;
for (u32 i = 0; i < n; i++)
{
for (u32 j = 0; j < l_string; j++)
bufstr[j] = charset[random() % n_charset];
char hash[16];
MD5((u8*) hash, (u8*) bufstr, l_string);
if (reverseHash(hash))
n_crack++;
rewriteLine();
printf("%lu / %lu", n_crack, i+1);
fflush(stdout);
}
printf("\n");
}
free(bufstr);
for (u32 i = 0; i < n_lt; i++)
LTable_Delete(<[i]);
free(lt);
return 0;
}
