proxmark3/client/mifare4.c
2018-10-24 18:58:12 +02:00

118 lines
3 KiB
C

//-----------------------------------------------------------------------------
// Copyright (C) 2018 Merlok
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// iso14443-4 mifare commands
//-----------------------------------------------------------------------------
#include "mifare4.h"
#include <ctype.h>
#include <string.h>
#include "cmdhf14a.h"
#include "util.h"
#include "ui.h"
#include "polarssl/libpcrypto.h"
int MifareAuth4(mf4Session *session, uint8_t *keyn, uint8_t *key, bool activateField, bool leaveSignalON, bool verbose) {
uint8_t data[257] = {0};
int datalen = 0;
uint8_t Rnd1[17] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x00};
uint8_t Rnd2[17] = {0};
if (session)
session->Authenticated = false;
uint8_t cmd1[] = {0x70, keyn[1], keyn[0], 0x00};
int res = ExchangeRAW14a(cmd1, sizeof(cmd1), activateField, true, data, sizeof(data), &datalen);
if (res) {
PrintAndLog("ERROR exchande raw error: %d", res);
DropField();
return 2;
}
if (verbose)
PrintAndLog("<phase1: %s", sprint_hex(data, datalen));
if (datalen < 1) {
PrintAndLog("ERROR: card response length: %d", datalen);
DropField();
return 3;
}
if (data[0] != 0x90) {
PrintAndLog("ERROR: card response error: %02x", data[2]);
DropField();
return 3;
}
if (datalen != 19) { // code 1b + 16b + crc 2b
PrintAndLog("ERROR: card response must be 19 bytes long instead of: %d", datalen);
DropField();
return 3;
}
aes_decode(NULL, key, &data[1], Rnd2, 16);
Rnd2[16] = Rnd2[0];
if (verbose)
PrintAndLog("Rnd2: %s", sprint_hex(Rnd2, 16));
uint8_t cmd2[33] = {0};
cmd2[0] = 0x72;
uint8_t raw[32] = {0};
memmove(raw, Rnd1, 16);
memmove(&raw[16], &Rnd2[1], 16);
aes_encode(NULL, key, raw, &cmd2[1], 32);
if (verbose)
PrintAndLog(">phase2: %s", sprint_hex(cmd2, 33));
res = ExchangeRAW14a(cmd2, sizeof(cmd2), false, false, data, sizeof(data), &datalen);
if (res) {
PrintAndLog("ERROR exchande raw error: %d", res);
DropField();
return 4;
}
if (verbose)
PrintAndLog("<phase2: %s", sprint_hex(data, datalen));
aes_decode(NULL, key, &data[1], raw, 32);
if (verbose) {
PrintAndLog("res: %s", sprint_hex(raw, 32));
PrintAndLog("Rnd1`: %s", sprint_hex(&raw[4], 16));
}
if (memcmp(&raw[4], &Rnd1[1], 16)) {
PrintAndLog("\nERROR: Authentication FAILED. rnd not equal");
if (verbose) {
PrintAndLog("rnd1 reader: %s", sprint_hex(&Rnd1[1], 16));
PrintAndLog("rnd1 card: %s", sprint_hex(&raw[4], 16));
}
DropField();
return 5;
}
if (!leaveSignalON)
DropField();
if (verbose)
PrintAndLog("");
if (session) {
session->Authenticated = true;
session->KeyNum = keyn[1] + (keyn[0] << 8);
memmove(session->Rnd1, Rnd1, 16);
memmove(session->Rnd2, Rnd2, 16);
}
PrintAndLog("Authentication OK");
return 0;
}