X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d2d0af8ca61484f1460ea302e6bcc2e1cac71297..01d7272d5bf2f07752d0fd79e95ac28dfaf6cb1b:/client/loclass/cipher.c?ds=inline diff --git a/client/loclass/cipher.c b/client/loclass/cipher.c index b3d87402..a701da31 100644 --- a/client/loclass/cipher.c +++ b/client/loclass/cipher.c @@ -1,5 +1,17 @@ /***************************************************************************** - * This file is part of iClassCipher. It is a reconstructon of the cipher engine + * WARNING + * + * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY. + * + * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL + * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL, + * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES. + * + * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS. + * + ***************************************************************************** + * + * This file is part of loclass. It is a reconstructon of the cipher engine * used in iClass, and RFID techology. * * The implementation is based on the work performed by @@ -18,19 +30,23 @@ * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with IClassCipher. If not, see <http://www.gnu.org/licenses/>. + * along with loclass. If not, see <http://www.gnu.org/licenses/>. + * + * + * ****************************************************************************/ + #include "cipher.h" #include "cipherutils.h" -#include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdbool.h> #include <stdint.h> -#include <time.h> +#ifndef ON_DEVICE #include "fileutils.h" -uint8_t keytable[] = { 0,0,0,0,0,0,0,0}; +#endif + /** * Definition 1 (Cipher state). A cipher state of iClass s is an element of F 40/2 @@ -205,27 +221,48 @@ void MAC(uint8_t* k, BitstreamIn input, BitstreamOut out) output(k,initState,&input_32_zeroes,&out); } -void doMAC(uint8_t *cc_nr_p, int length,uint8_t *div_key_p, uint8_t mac[4]) +void doMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4]) { - uint8_t *cc_nr; - uint8_t div_key[8]; - cc_nr=(uint8_t*)malloc(length+1); - memcpy(cc_nr,cc_nr_p,length); - memcpy(div_key,div_key_p,8); - - reverse_arraybytes(cc_nr,length); - BitstreamIn bitstream = {cc_nr,length * 8,0}; - uint8_t dest []= {0,0,0,0,0,0,0,0}; - BitstreamOut out = { dest, sizeof(dest)*8, 0 }; - MAC(div_key,bitstream, out); - //The output MAC must also be reversed - reverse_arraybytes(dest, sizeof(dest)); - memcpy(mac, dest, 4); - printf("Calculated_MAC\t%02x%02x%02x%02x\n", dest[0],dest[1],dest[2],dest[3]); - free(cc_nr); - return 1; + uint8_t cc_nr[13] = { 0 }; + uint8_t div_key[8]; + //cc_nr=(uint8_t*)malloc(length+1); + + memcpy(cc_nr, cc_nr_p, 12); + memcpy(div_key, div_key_p, 8); + + reverse_arraybytes(cc_nr,12); + BitstreamIn bitstream = {cc_nr, 12 * 8, 0}; + uint8_t dest []= {0,0,0,0,0,0,0,0}; + BitstreamOut out = { dest, sizeof(dest)*8, 0 }; + MAC(div_key,bitstream, out); + //The output MAC must also be reversed + reverse_arraybytes(dest, sizeof(dest)); + memcpy(mac, dest, 4); + //free(cc_nr); + return; +} +void doMAC_N(uint8_t *address_data_p, uint8_t address_data_size, uint8_t *div_key_p, uint8_t mac[4]) +{ + uint8_t *address_data; + uint8_t div_key[8]; + address_data = (uint8_t*) malloc(address_data_size); + + memcpy(address_data, address_data_p, address_data_size); + memcpy(div_key, div_key_p, 8); + + reverse_arraybytes(address_data, address_data_size); + BitstreamIn bitstream = {address_data, address_data_size * 8, 0}; + uint8_t dest []= {0,0,0,0,0,0,0,0}; + BitstreamOut out = { dest, sizeof(dest)*8, 0 }; + MAC(div_key, bitstream, out); + //The output MAC must also be reversed + reverse_arraybytes(dest, sizeof(dest)); + memcpy(mac, dest, 4); + free(address_data); + return; } +#ifndef ON_DEVICE int testMAC() { prnlog("[+] Testing MAC calculation..."); @@ -237,7 +274,7 @@ int testMAC() uint8_t correct_MAC[4] = {0x1d,0x49,0xC9,0xDA}; uint8_t calculated_mac[4] = {0}; - doMAC(cc_nr, 12, div_key, calculated_mac); + doMAC(cc_nr,div_key, calculated_mac); if(memcmp(calculated_mac, correct_MAC,4) == 0) { @@ -253,3 +290,4 @@ int testMAC() return 0; } +#endif