mirror of
https://github.com/Proxmark/proxmark3.git
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294 lines
7.8 KiB
C
294 lines
7.8 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) Merlok - 2017
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Command: hf mf list. It shows data from arm buffer.
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//-----------------------------------------------------------------------------
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#include "cmdhflist.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "util.h"
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#include "data.h"
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#include "ui.h"
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#include "iso14443crc.h"
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#include "parity.h"
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#include "protocols.h"
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#include "crapto1/crapto1.h"
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#include "mifarehost.h"
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enum MifareAuthSeq {
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masNone,
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masNt,
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masNrAr,
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masAt,
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masFirstData,
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masData,
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masDataNested,
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masError,
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};
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static enum MifareAuthSeq MifareAuthState;
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static TAuthData AuthData;
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void ClearAuthData() {
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AuthData.uid = 0;
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AuthData.nt = 0;
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AuthData.first_auth = true;
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}
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/**
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* @brief iso14443A_CRC_check Checks CRC in command or response
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* @param isResponse
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* @param data
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* @param len
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* @return 0 : CRC-command, CRC not ok
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* 1 : CRC-command, CRC ok
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* 2 : Not crc-command
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*/
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uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
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{
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uint8_t b1,b2;
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if(len <= 2) return 2;
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if(isResponse & (len < 6)) return 2;
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ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
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if (b1 != data[len-2] || b2 != data[len-1]) {
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return 0;
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} else {
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return 1;
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}
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}
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uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
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{
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switch(MifareAuthState) {
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case masNone:
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case masFirstData:
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case masData:
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case masDataNested:
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case masError:
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return iso14443A_CRC_check(isResponse, data, len);
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default:
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return 2;
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}
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}
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void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
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{
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switch(cmd[0])
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{
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case ISO14443A_CMD_WUPA:
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snprintf(exp,size,"WUPA");
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MifareAuthState = masNone;
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break;
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case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
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// 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
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// 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
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if(cmd[1] == 0x70)
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{
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snprintf(exp,size,"SELECT_UID"); break;
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}else
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{
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snprintf(exp,size,"ANTICOLL"); break;
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}
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}
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case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
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//95 20 = Anticollision of cascade level2
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//95 70 = Select of cascade level2
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if(cmd[2] == 0x70)
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{
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snprintf(exp,size,"SELECT_UID-2"); break;
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}else
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{
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snprintf(exp,size,"ANTICOLL-2"); break;
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}
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}
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case ISO14443A_CMD_REQA:
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snprintf(exp,size,"REQA");
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MifareAuthState = masNone;
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break;
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case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
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case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
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case ISO14443A_CMD_HALT:
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snprintf(exp,size,"HALT");
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MifareAuthState = masNone;
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break;
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case ISO14443A_CMD_RATS: snprintf(exp,size,"RATS"); break;
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case MIFARE_CMD_INC: snprintf(exp,size,"INC(%d)",cmd[1]); break;
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case MIFARE_CMD_DEC: snprintf(exp,size,"DEC(%d)",cmd[1]); break;
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case MIFARE_CMD_RESTORE: snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
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case MIFARE_CMD_TRANSFER: snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
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case MIFARE_AUTH_KEYA:
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if ( cmdsize > 3) {
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snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
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MifareAuthState = masNt;
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} else {
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// case MIFARE_ULEV1_VERSION : both 0x60.
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snprintf(exp,size,"EV1 VERSION");
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}
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break;
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case MIFARE_AUTH_KEYB:
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MifareAuthState = masNt;
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snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
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break;
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case MIFARE_MAGICWUPC1: snprintf(exp,size,"MAGIC WUPC1"); break;
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case MIFARE_MAGICWUPC2: snprintf(exp,size,"MAGIC WUPC2"); break;
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case MIFARE_MAGICWIPEC: snprintf(exp,size,"MAGIC WIPEC"); break;
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case MIFARE_ULC_AUTH_1: snprintf(exp,size,"AUTH "); break;
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case MIFARE_ULC_AUTH_2: snprintf(exp,size,"AUTH_ANSW"); break;
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case MIFARE_ULEV1_AUTH:
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if ( cmdsize == 7 )
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snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
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else
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snprintf(exp,size,"PWD-AUTH");
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break;
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case MIFARE_ULEV1_FASTREAD:{
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if ( cmdsize >=3 && cmd[2] <= 0xE6)
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snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
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else
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snprintf(exp,size,"?");
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break;
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}
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case MIFARE_ULC_WRITE:{
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if ( cmd[1] < 0x21 )
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snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
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else
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snprintf(exp,size,"?");
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break;
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}
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case MIFARE_ULEV1_READ_CNT:{
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if ( cmd[1] < 5 )
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snprintf(exp,size,"READ CNT(%d)",cmd[1]);
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else
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snprintf(exp,size,"?");
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break;
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}
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case MIFARE_ULEV1_INCR_CNT:{
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if ( cmd[1] < 5 )
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snprintf(exp,size,"INCR(%d)",cmd[1]);
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else
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snprintf(exp,size,"?");
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break;
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}
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case MIFARE_ULEV1_READSIG: snprintf(exp,size,"READ_SIG"); break;
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case MIFARE_ULEV1_CHECKTEAR: snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
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case MIFARE_ULEV1_VCSL: snprintf(exp,size,"VCSL"); break;
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default: snprintf(exp,size,"?"); break;
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}
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return;
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}
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void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
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// get UID
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if (MifareAuthState == masNone) {
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if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
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ClearAuthData();
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AuthData.uid = bytes_to_num(&cmd[2], 4);
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}
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if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
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ClearAuthData();
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AuthData.uid = bytes_to_num(&cmd[2], 4);
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}
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}
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switch(MifareAuthState) {
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case masNt:
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if (cmdsize == 4 && isResponse) {
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snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
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MifareAuthState = masNrAr;
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if (AuthData.first_auth)
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AuthData.nt = bytes_to_num(cmd, 4);
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else
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AuthData.nt_enc = bytes_to_num(cmd, 4);
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AuthData.nt_enc_par = parity[0];
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return;
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} else {
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MifareAuthState = masError;
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}
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break;
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case masNrAr:
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if (cmdsize == 8 && !isResponse) {
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snprintf(exp,size,"AUTH: nr ar (enc)");
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MifareAuthState = masAt;
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AuthData.nr_enc = bytes_to_num(cmd, 4);
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AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
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AuthData.ar_enc_par = parity[0] << 4;
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return;
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} else {
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MifareAuthState = masError;
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}
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break;
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case masAt:
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if (cmdsize == 4 && isResponse) {
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snprintf(exp,size,"AUTH: at (enc)");
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MifareAuthState = masFirstData;
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AuthData.at_enc = bytes_to_num(cmd, 4);
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AuthData.at_enc_par = parity[0];
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return;
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} else {
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MifareAuthState = masError;
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}
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break;
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default:
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break;
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}
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if (!isResponse)
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annotateIso14443a(exp, size, cmd, cmdsize);
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}
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bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
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*mfDataLen = 0;
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if (cmdsize > 32)
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return false;
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if (MifareAuthState == masFirstData) {
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if (AuthData.first_auth) {
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uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
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uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
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struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
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lfsr_rollback_word(revstate, 0, 0);
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lfsr_rollback_word(revstate, 0, 0);
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lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
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lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
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uint64_t lfsr = 0;
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crypto1_get_lfsr(revstate, &lfsr);
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crypto1_destroy(revstate);
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// LastKey = lfsr;
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PrintAndLog(" | * | key | probable key:%x%x Prng:%s ks2:%08x ks3:%08x | |",
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(unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
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validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
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ks2,
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ks3);
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AuthData.first_auth = false;
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} else {
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printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
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}
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MifareAuthState = masData;
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return true;
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}
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if (MifareAuthState == masData) {
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}
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return *mfDataLen > 0;
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}
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