RfidResearchGroup/proxmark3
1
1
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-01-09 17:56:53 +08:00
Code Issues Projects Releases Packages Wiki Activity

reworked "lf em 4x50 chk" to use dynamic memory for dictionary

Browse source
This commit is contained in:
iceman1001 2021-06-25 19:46:12 +02:00
parent a10c92267e
commit 26b37ce64f
1 changed files with 19 additions and 29 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

48
client/src/cmdlfem4x50.c
View file

@ -462,34 +462,32 @@ int CmdEM4x50Chk(const char *Cmd) {
PrintAndLogEx(INFO, "treating file as T55xx keys");
}
// load keys
uint8_t *keys = NULL;
uint32_t key_count = 0;
int res = loadFileDICTIONARY_safe(filename, (void **)&keys, 4, &key_count);
if (res != PM3_SUCCESS || key_count == 0) {
free(keys);
return res;
}
uint64_t t1 = msclock();
size_t datalen = 0;
// 2021 iceman: how many keys shall we reserv space for? The t55xx dictionary has 139 keys.
uint8_t data[2000 * 4] = {0x0};
uint8_t *keys = data;
uint32_t key_count = 0;
int res = loadFileDICTIONARY(filename, data, &datalen, 4, &key_count);
if ((res != PM3_SUCCESS) || (key_count == 0))
return PM3_EFILE;
PrintAndLogEx(INFO, "You can cancel this operation by pressing the pm3 button");
int status = PM3_EFAILED;
int keyblock = 2000; // block with 2000 bytes -> 500 keys
// block with 2000 bytes -> 500 keys
uint8_t destfn[32] = "em4x50_chk.bin";
PacketResponseNG resp;
int bytes_remaining = datalen;
int bytes_remaining = key_count * 4;
int status = PM3_EFAILED;
while (bytes_remaining > 0) {
PrintAndLogEx(INPLACE, "Remaining keys: %i ", bytes_remaining / 4);
// upload to flash.
datalen = MIN(bytes_remaining, keyblock);
res = flashmem_spiffs_load((char *)destfn, keys, datalen);
size_t n = MIN(bytes_remaining, 2000);
res = flashmem_spiffs_load((char *)destfn, keys, n);
if (res != PM3_SUCCESS) {
PrintAndLogEx(WARNING, "SPIFFS upload failed");
return res;
@ -503,22 +501,14 @@ int CmdEM4x50Chk(const char *Cmd) {
if ((status == PM3_SUCCESS) || (status == PM3_EOPABORTED))
break;
bytes_remaining -= keyblock;
keys += keyblock;
bytes_remaining -= n;
keys += n;
}
free(keys);
PrintAndLogEx(NORMAL, "");
// print response
if (status == PM3_SUCCESS) {
/*
PrintAndLogEx(SUCCESS, "Key " _GREEN_("found: %02x %02x %02x %02x"),
resp.data.asBytes[3],
resp.data.asBytes[2],
resp.data.asBytes[1],
resp.data.asBytes[0]
);
*/
uint32_t pwd = BYTES2UINT32(resp.data.asBytes);
PrintAndLogEx(SUCCESS, "found valid password [ " _GREEN_("%08"PRIX32) " ]", pwd);
} else {