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Add mifare crypto trace decryption utility

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allows manual decryption of hf 14a snoop traces of a mf card.
someday we should fix hf mf sniff...
This commit is contained in:
marshmellow42 2015-10-07 00:24:55 -04:00
parent e1c6e9e8f1
commit 1a5a73abae
5 changed files with 51 additions and 0 deletions
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21
client/util.c
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@ -333,7 +333,28 @@ int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
return 0;
}
int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
{
int bg, en, temp, i;
//if (hexcnt % 2)
// return 1;
if (param_getptr(line, &bg, &en, paramnum)) return 1;
*hexcnt = en - bg + 1;
if (*hexcnt % 2) //error if not complete hex bytes
return 1;
for(i = 0; i < *hexcnt; i += 2) {
if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
data[i / 2] = temp & 0xff;
}
return 0;
}
int param_getstr(const char *line, int paramnum, char * str)
{
int bg, en;