mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-22 00:06:13 +08:00
d19754567d
* .h include only the strict minimum for their own parsing * this forces all files to include explicitment their needs and not count on far streched dependencies * this helps Makefile to rebuild only the minimum * according to this rule, most standalone .h are now gone * big app.h is gone * remove seldom __cplusplus, if c++ happens, everything will have to be done properly anyway * all unrequired include were removed * split common/ into common/ (client+arm) and common_arm/ (os+bootloader) * bring zlib to common/ * bring stuff not really/not yet used in common back to armsrc/ or client/ * bring liblua into client/ * bring uart into client/ * move some portions of code around (dbprint, protocols,...) * rename unused files into *_disabled.[ch] to make it explicit * rename soft Uarts between 14a, 14b and iclass, so a standalone could use several without clash * remove PrintAndLogDevice * move deprecated-hid-flasher from client to tools * Makefiles * treat deps in armsrc/ as in client/ * client: stop on warning (-Werror), same as for armsrc/ Tested on: * all standalone modes * Linux
180 lines
6 KiB
C
180 lines
6 KiB
C
/* roca.c - ROCA (CVE-2017-15361) fingerprint checker.
|
|
* Written by Rob Stradling (based on https://github.com/crocs-muni/roca/blob/master/roca/detect.py)
|
|
* Copyright (C) 2017-2018 Sectigo Limited
|
|
* modified 2018 iceman (dropped openssl bignum, now use mbedtls lib)
|
|
* modified 2018 merlok
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
//-----------------------------------------------------------------------------
|
|
// EMV roca commands
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "emv_roca.h"
|
|
|
|
#include "ui.h" // Print...
|
|
#include "mbedtls/bignum.h"
|
|
|
|
static uint8_t g_primes[ROCA_PRINTS_LENGTH] = {
|
|
11, 13, 17, 19, 37, 53, 61, 71, 73, 79, 97, 103, 107, 109, 127, 151, 157
|
|
};
|
|
|
|
mbedtls_mpi g_prints[ROCA_PRINTS_LENGTH];
|
|
|
|
static void rocacheck_init(void) {
|
|
|
|
for (int i = 0; i < ROCA_PRINTS_LENGTH; i++)
|
|
mbedtls_mpi_init(&g_prints[i]);
|
|
|
|
mbedtls_mpi_read_string(&g_prints[0], 10, "1026");
|
|
mbedtls_mpi_read_string(&g_prints[1], 10, "5658");
|
|
mbedtls_mpi_read_string(&g_prints[2], 10, "107286");
|
|
mbedtls_mpi_read_string(&g_prints[3], 10, "199410");
|
|
mbedtls_mpi_read_string(&g_prints[4], 10, "67109890");
|
|
mbedtls_mpi_read_string(&g_prints[5], 10, "5310023542746834");
|
|
mbedtls_mpi_read_string(&g_prints[6], 10, "1455791217086302986");
|
|
mbedtls_mpi_read_string(&g_prints[7], 10, "20052041432995567486");
|
|
mbedtls_mpi_read_string(&g_prints[8], 10, "6041388139249378920330");
|
|
mbedtls_mpi_read_string(&g_prints[9], 10, "207530445072488465666");
|
|
mbedtls_mpi_read_string(&g_prints[10], 10, "79228162521181866724264247298");
|
|
mbedtls_mpi_read_string(&g_prints[11], 10, "1760368345969468176824550810518");
|
|
mbedtls_mpi_read_string(&g_prints[12], 10, "50079290986288516948354744811034");
|
|
mbedtls_mpi_read_string(&g_prints[13], 10, "473022961816146413042658758988474");
|
|
mbedtls_mpi_read_string(&g_prints[14], 10, "144390480366845522447407333004847678774");
|
|
mbedtls_mpi_read_string(&g_prints[15], 10, "1800793591454480341970779146165214289059119882");
|
|
mbedtls_mpi_read_string(&g_prints[16], 10, "126304807362733370595828809000324029340048915994");
|
|
}
|
|
|
|
static void rocacheck_cleanup(void) {
|
|
for (int i = 0; i < ROCA_PRINTS_LENGTH; i++)
|
|
mbedtls_mpi_free(&g_prints[i]);
|
|
}
|
|
|
|
static int bitand_is_zero(mbedtls_mpi *a, mbedtls_mpi *b) {
|
|
|
|
for (int i = 0; i < mbedtls_mpi_bitlen(a); i++) {
|
|
|
|
if (mbedtls_mpi_get_bit(a, i) && mbedtls_mpi_get_bit(b, i))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static mbedtls_mpi_uint mpi_get_uint(const mbedtls_mpi *X) {
|
|
|
|
if (X->n == 1 && X->s > 0) {
|
|
return X->p[0];
|
|
}
|
|
printf("ZERRRRO!!!\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
static void print_mpi(const char *msg, int radix, const mbedtls_mpi *X) {
|
|
|
|
char Xchar[400] = {0};
|
|
size_t len = 0;
|
|
|
|
mbedtls_mpi_write_string(X, radix, Xchar, sizeof(Xchar), &len);
|
|
printf("%s[%zu] %s\n", msg, len, Xchar);
|
|
}
|
|
*/
|
|
bool emv_rocacheck(const unsigned char *buf, size_t buflen, bool verbose) {
|
|
|
|
mbedtls_mpi t_modulus;
|
|
mbedtls_mpi_init(&t_modulus);
|
|
|
|
bool ret = false;
|
|
|
|
rocacheck_init();
|
|
|
|
MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&t_modulus, buf, buflen));
|
|
|
|
for (int i = 0; i < ROCA_PRINTS_LENGTH; i++) {
|
|
|
|
mbedtls_mpi t_temp;
|
|
mbedtls_mpi t_prime;
|
|
mbedtls_mpi g_one;
|
|
|
|
mbedtls_mpi_init(&t_temp);
|
|
mbedtls_mpi_init(&t_prime);
|
|
mbedtls_mpi_init(&g_one);
|
|
|
|
MBEDTLS_MPI_CHK(mbedtls_mpi_read_string(&g_one, 10, "1"));
|
|
|
|
MBEDTLS_MPI_CHK(mbedtls_mpi_add_int(&t_prime, &t_prime, g_primes[i]));
|
|
|
|
MBEDTLS_MPI_CHK(mbedtls_mpi_mod_mpi(&t_temp, &t_modulus, &t_prime));
|
|
|
|
MBEDTLS_MPI_CHK(mbedtls_mpi_shift_l(&g_one, mpi_get_uint(&t_temp)));
|
|
|
|
if (bitand_is_zero(&g_one, &g_prints[i])) {
|
|
if (verbose)
|
|
PrintAndLogEx(FAILED, "No fingerprint found.\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
mbedtls_mpi_free(&g_one);
|
|
mbedtls_mpi_free(&t_temp);
|
|
mbedtls_mpi_free(&t_prime);
|
|
}
|
|
|
|
ret = true;
|
|
if (verbose)
|
|
PrintAndLogEx(SUCCESS, "Fingerprint found!\n");
|
|
|
|
cleanup:
|
|
mbedtls_mpi_free(&t_modulus);
|
|
|
|
rocacheck_cleanup();
|
|
return ret;
|
|
}
|
|
|
|
int roca_self_test(void) {
|
|
int ret = 0;
|
|
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(INFO, "ROCA check vulnerability tests");
|
|
|
|
// positive
|
|
uint8_t keyp[] = "\x94\x4e\x13\x20\x8a\x28\x0c\x37\xef\xc3\x1c\x31\x14\x48\x5e\x59"\
|
|
"\x01\x92\xad\xbb\x8e\x11\xc8\x7c\xad\x60\xcd\xef\x00\x37\xce\x99"\
|
|
"\x27\x83\x30\xd3\xf4\x71\xa2\x53\x8f\xa6\x67\x80\x2e\xd2\xa3\xc4"\
|
|
"\x4a\x8b\x7d\xea\x82\x6e\x88\x8d\x0a\xa3\x41\xfd\x66\x4f\x7f\xa7";
|
|
|
|
|
|
if (emv_rocacheck(keyp, 64, false)) {
|
|
PrintAndLogEx(SUCCESS, "Weak modulus [ %s]", _GREEN_("PASS"));
|
|
} else {
|
|
ret++;
|
|
PrintAndLogEx(FAILED, "Weak modulus [ %s]", _RED_("Fail"));
|
|
}
|
|
|
|
// negative
|
|
uint8_t keyn[] = "\x84\x4e\x13\x20\x8a\x28\x0c\x37\xef\xc3\x1c\x31\x14\x48\x5e\x59"\
|
|
"\x01\x92\xad\xbb\x8e\x11\xc8\x7c\xad\x60\xcd\xef\x00\x37\xce\x99"\
|
|
"\x27\x83\x30\xd3\xf4\x71\xa2\x53\x8f\xa6\x67\x80\x2e\xd2\xa3\xc4"\
|
|
"\x4a\x8b\x7d\xea\x82\x6e\x88\x8d\x0a\xa3\x41\xfd\x66\x4f\x7f\xa7";
|
|
|
|
if (emv_rocacheck(keyn, 64, false)) {
|
|
ret++;
|
|
PrintAndLogEx(FAILED, "Strong modulus [ %s]", _RED_("Fail"));
|
|
} else {
|
|
PrintAndLogEx(SUCCESS, "Strong modulus [ %s]", _GREEN_("PASS"));
|
|
}
|
|
|
|
return ret;
|
|
}
|