depau/mfoc-always-skip-probes
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Adding ability to load keys from file

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Switch -f allows for a file to be provided that contains additional keys
This commit is contained in:
Simon Yorkston 2015-04-15 12:45:15 +02:00
parent 00eae36f89
commit 86caca5f6b
1 changed files with 53 additions and 13 deletions
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42
src/mfoc.c
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@ -114,6 +114,16 @@ int main(int argc, char *const argv[])
mifare_cmd mc;
FILE *pfDump = NULL;
//File pointers for the keyfile
FILE * fp;
char * line = NULL;
size_t len = 0;
ssize_t read;
//Regexp declarations
static const char *regex = "(?i)([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])";
struct slre_cap caps[2];
// Parse command line arguments
while ((ch = getopt(argc, argv, "hD:s:BP:T:S:O:k:t:")) != -1) {
switch (ch) {
@ -136,6 +146,34 @@ int main(int argc, char *const argv[])
// fprintf(stdout, "Tolerance number: %d\n", probes);
}
break;
case 'f':
if (!(fp = fopen(optarg, "r"))) {
fprintf(stderr, "Cannot open keyfile: %s, exiting\n", optarg);
exit(EXIT_FAILURE);
}
while ((read = getline(&line, &len, fp)) != -1) {
int i, j = 0, str_len = strlen(line);
while (j < str_len &&
(i = slre_match(regex, line + j, str_len - j, caps, 2)) > 0) {
//We've found a key, let's add it to the structure.
p = realloc(defKeys, defKeys_len + 6);
if (!p) {
ERR("Cannot allocate memory for defKeys");
exit(EXIT_FAILURE);
}
defKeys = p;
memset(defKeys + defKeys_len, 0, 6);
num_to_bytes(strtoll(caps[0].ptr, NULL, 16), 6, defKeys + defKeys_len);
fprintf(stdout, "The custom key 0x%.*s has been added to the default keys\n", caps[0].len, caps[0].ptr);
defKeys_len = defKeys_len + 6;
j += i;
}
}
if (line)
free(line);
break;
case 'k':
// Add this key to the default keys
p = realloc(defKeys, defKeys_len + 6);
@ -661,11 +699,12 @@ error:
void usage(FILE *stream, int errno)
{
fprintf(stream, "Usage: mfoc [-h] [-k key]... [-P probnum] [-T tolerance] [-O output]\n");
fprintf(stream, "Usage: mfoc [-h] [-k key] [-f file] ... [-P probnum] [-T tolerance] [-O output]\n");
fprintf(stream, "\n");
fprintf(stream, " h print this help and exit\n");
// fprintf(stream, " B instead of 'A' dump 'B' keys\n");
fprintf(stream, " k try the specified key in addition to the default keys\n");
fprintf(stream, " f parses a file of keys to add in addition to the default keys \n");
// fprintf(stream, " D number of distance probes, default is 20\n");
// fprintf(stream, " S number of sets with keystreams, default is 5\n");
fprintf(stream, " P number of probes per sector, instead of default of 20\n");
@ -675,6 +714,7 @@ void usage(FILE *stream, int errno)
fprintf(stream, "\n");
fprintf(stream, "Example: mfoc -O mycard.mfd\n");
fprintf(stream, "Example: mfoc -k ffffeeeedddd -O mycard.mfd\n");
fprintf(stream, "Example: mfoc -f keys.txt -O mycard.mfd\n");
fprintf(stream, "Example: mfoc -P 50 -T 30 -O mycard.mfd\n");
fprintf(stream, "\n");
fprintf(stream, "This is mfoc version %s.\n", PACKAGE_VERSION);