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proxmark3/client/cmdhficlass.c

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//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>, Hagen Fritsch
// Copyright (C) 2011 Gerhard de Koning Gans
// Copyright (C) 2014 Midnitesnake & Andy Davies & Martin Holst Swende
//
// 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.
//-----------------------------------------------------------------------------
// High frequency iClass commands
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "iso14443crc.h" // Can also be used for iClass, using 0xE012 as CRC-type
#include "data.h"
#include "proxmark3.h"
#include "ui.h"
#include "cmdparser.h"
#include "cmdhficlass.h"
#include "common.h"
#include "util.h"
#include "cmdmain.h"
#include "loclass/des.h"
#include "loclass/cipherutils.h"
#include "loclass/cipher.h"
#include "loclass/ikeys.h"
#include "loclass/elite_crack.h"
#include "loclass/fileutils.h"
static int CmdHelp(const char *Cmd);
int xorbits_8(uint8_t val)
{
uint8_t res = val ^ (val >> 1); //1st pass
res = res ^ (res >> 1); // 2nd pass
res = res ^ (res >> 2); // 3rd pass
res = res ^ (res >> 4); // 4th pass
return res & 1;
}
int CmdHFiClassList(const char *Cmd)
{
PrintAndLog("Deprecated command, use 'hf list iclass' instead");
return 0;
}
int CmdHFiClassSnoop(const char *Cmd)
{
UsbCommand c = {CMD_SNOOP_ICLASS};
SendCommand(&c);
return 0;
}
int usage_hf_iclass_sim()
{
PrintAndLog("Usage: hf iclass sim <option> [CSN]");
PrintAndLog(" options");
PrintAndLog(" 0 <CSN> simulate the given CSN");
PrintAndLog(" 1 simulate default CSN");
PrintAndLog(" 2 Reader-attack, gather reader responses to extract elite key");
PrintAndLog(" 3 Full simulation using emulator memory (see 'hf iclass eload')");
PrintAndLog(" example: hf iclass sim 0 031FEC8AF7FF12E0");
PrintAndLog(" example: hf iclass sim 2");
PrintAndLog(" example: hf iclass eload 'tagdump.bin'");
PrintAndLog(" hf iclass sim 3");
return 0;
}
#define NUM_CSNS 15
int CmdHFiClassSim(const char *Cmd)
{
uint8_t simType = 0;
uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
if (strlen(Cmd)<1) {
usage_hf_iclass_sim();
}
simType = param_get8(Cmd, 0);
if(simType == 0)
{
if (param_gethex(Cmd, 1, CSN, 16)) {
PrintAndLog("A CSN should consist of 16 HEX symbols");
return usage_hf_iclass_sim();
}
PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
}
if(simType > 3)
{
PrintAndLog("Undefined simptype %d", simType);
return usage_hf_iclass_sim();
}
uint8_t numberOfCSNs=0;
if(simType == 2)
{
UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,NUM_CSNS}};
UsbCommand resp = {0};
uint8_t csns[8*NUM_CSNS] = {
0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x04, 0x0E, 0x08, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x09, 0x0D, 0x05, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x0A, 0x0C, 0x06, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x0F, 0x0B, 0x03, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x08, 0x0A, 0x0C, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x0D, 0x09, 0x09, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x0E, 0x08, 0x0A, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x03, 0x07, 0x17, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x3C, 0x06, 0xE0, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x01, 0x05, 0x1D, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x02, 0x04, 0x1E, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x07, 0x03, 0x1B, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x00, 0x02, 0x24, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x05, 0x01, 0x21, 0xF7, 0xFF, 0x12, 0xE0 };
memcpy(c.d.asBytes, csns, 8*NUM_CSNS);
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
PrintAndLog("Command timed out");
return 0;
}
uint8_t num_mac_responses = resp.arg[1];
PrintAndLog("Mac responses: %d MACs obtained (should be %d)", num_mac_responses,NUM_CSNS);
size_t datalen = NUM_CSNS*24;
/*
* Now, time to dump to file. We'll use this format:
* <8-byte CSN><8-byte CC><4 byte NR><4 byte MAC>....
* So, it should wind up as
* 8 * 24 bytes.
*
* The returndata from the pm3 is on the following format
* <4 byte NR><4 byte MAC>
* CC are all zeroes, CSN is the same as was sent in
**/
void* dump = malloc(datalen);
memset(dump,0,datalen);//<-- Need zeroes for the CC-field
uint8_t i = 0;
for(i = 0 ; i < NUM_CSNS ; i++)
{
memcpy(dump+i*24, csns+i*8,8); //CSN
//8 zero bytes here...
//Then comes NR_MAC (eight bytes from the response)
memcpy(dump+i*24+16,resp.d.asBytes+i*8,8);
}
/** Now, save to dumpfile **/
saveFile("iclass_mac_attack", "bin", dump,datalen);
free(dump);
}else
{
UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
memcpy(c.d.asBytes, CSN, 8);
SendCommand(&c);
}
return 0;
}
int CmdHFiClassReader(const char *Cmd)
{
UsbCommand c = {CMD_READER_ICLASS, {0}};
SendCommand(&c);
UsbCommand resp;
while(!ukbhit()){
if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
uint8_t isOK = resp.arg[0] & 0xff;
uint8_t * data = resp.d.asBytes;
PrintAndLog("isOk:%02x", isOK);
if( isOK == 0){
//Aborted
PrintAndLog("Quitting...");
return 0;
}
if(isOK > 0)
{
PrintAndLog("CSN: %s",sprint_hex(data,8));
}
if(isOK >= 1)
{
PrintAndLog("CC: %s",sprint_hex(data+8,8));
}else{
PrintAndLog("No CC obtained");
}
} else {
PrintAndLog("Command execute timeout");
}
}
return 0;
}
int CmdHFiClassReader_Replay(const char *Cmd)
{
uint8_t readerType = 0;
uint8_t MAC[4]={0x00, 0x00, 0x00, 0x00};
if (strlen(Cmd)<1) {
PrintAndLog("Usage: hf iclass replay <MAC>");
PrintAndLog(" sample: hf iclass replay 00112233");
return 0;
}
if (param_gethex(Cmd, 0, MAC, 8)) {
PrintAndLog("MAC must include 8 HEX symbols");
return 1;
}
UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}};
memcpy(c.d.asBytes, MAC, 4);
SendCommand(&c);
return 0;
}
int CmdHFiClassReader_Dump(const char *Cmd)
{
uint8_t readerType = 0;
uint8_t MAC[4]={0x00,0x00,0x00,0x00};
uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
//uint8_t CC_temp[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t keytable[128] = {0};
int elite = 0;
uint8_t *used_key;
int i;
if (strlen(Cmd)<1)
{
PrintAndLog("Usage: hf iclass dump <Key> [e]");
PrintAndLog(" Key - A 16 byte master key");
PrintAndLog(" e - If 'e' is specified, the key is interpreted as the 16 byte");
PrintAndLog(" Custom Key (KCus), which can be obtained via reader-attack");
PrintAndLog(" See 'hf iclass sim 2'. This key should be on iclass-format");
PrintAndLog(" sample: hf iclass dump 0011223344556677");
return 0;
}
if (param_gethex(Cmd, 0, KEY, 16))
{
PrintAndLog("KEY must include 16 HEX symbols");
return 1;
}
if (param_getchar(Cmd, 1) == 'e')
{
PrintAndLog("Elite switch on");
elite = 1;
//calc h2
hash2(KEY, keytable);
printarr_human_readable("keytable", keytable, 128);
}
UsbCommand resp;
uint8_t key_sel[8] = {0};
uint8_t key_sel_p[8] = { 0 };
UsbCommand c = {CMD_READER_ICLASS, {0}};
c.arg[0] = FLAG_ICLASS_READER_ONLY_ONCE| FLAG_ICLASS_READER_GET_CC;
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
{
PrintAndLog("Command execute timeout");
return 0;
}
uint8_t isOK = resp.arg[0] & 0xff;
uint8_t * data = resp.d.asBytes;
memcpy(CSN,data,8);
memcpy(CCNR,data+8,8);
PrintAndLog("isOk:%02x", isOK);
if(isOK > 0)
{
PrintAndLog("CSN: %s",sprint_hex(CSN,8));
}
if(isOK <= 1){
PrintAndLog("Failed to obtain CC! Aborting");
return 0;
}
//Status 2 or higher
if(elite)
{
//Get the key index (hash1)
uint8_t key_index[8] = {0};
hash1(CSN, key_index);
printvar("hash1", key_index,8);
for(i = 0; i < 8 ; i++)
key_sel[i] = keytable[key_index[i]] & 0xFF;
PrintAndLog("Pre-fortified 'permuted' HS key that would be needed by an iclass reader to talk to above CSN:");
printvar("k_sel", key_sel,8);
//Permute from iclass format to standard format
permutekey_rev(key_sel,key_sel_p);
used_key = key_sel_p;
}else{
used_key = KEY;
}
PrintAndLog("Pre-fortified key that would be needed by the OmniKey reader to talk to above CSN:");
printvar("Used key",used_key,8);
diversifyKey(CSN,used_key, div_key);
PrintAndLog("Hash0, a.k.a diversified key, that is computed using Ksel and stored in the card (Block 3):");
printvar("Div key", div_key, 8);
printvar("CC_NR:",CCNR,12);
doMAC(CCNR,12,div_key, MAC);
printvar("MAC", MAC, 4);
uint8_t iclass_data[32000] = {0};
uint32_t iclass_datalen = 0;
uint32_t iclass_blocksFailed = 0;//Set to 1 if dump was incomplete
UsbCommand d = {CMD_READER_ICLASS_REPLAY, {readerType}};
memcpy(d.d.asBytes, MAC, 4);
clearCommandBuffer();
SendCommand(&d);
PrintAndLog("Waiting for device to dump data. Press button on device and key on keyboard to abort...");
while (true) {
printf(".");
if (ukbhit()) {
getchar();
printf("\naborted via keyboard!\n");
break;
}
if(WaitForResponseTimeout(CMD_ACK,&resp,4500))
{
uint32_t dataLength = resp.arg[0];
iclass_blocksFailed |= resp.arg[1];
if(dataLength > 0)
{
PrintAndLog("Got %d bytes data (total so far %d)" ,dataLength,iclass_datalen);
memcpy(iclass_data, resp.d.asBytes,dataLength);
iclass_datalen += dataLength;
}else
{//Last transfer, datalength 0 means the dump is finished
PrintAndLog("Dumped %d bytes of data from tag. ", iclass_datalen);
if(iclass_blocksFailed)
{
PrintAndLog("OBS! Some blocks failed to be dumped correctly!");
}
if(iclass_datalen > 0)
{
char filename[100] = {0};
//create a preferred filename
snprintf(filename, 100,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x",
CSN[0],CSN[1],CSN[2],CSN[3],
CSN[4],CSN[5],CSN[6],CSN[7]);
saveFile(filename,"bin",iclass_data, iclass_datalen );
}
//Aaaand we're finished
return 0;
}
}
}
return 0;
}
int hf_iclass_eload_usage()
{
PrintAndLog("Loads iclass tag-dump into emulator memory on device");
PrintAndLog("Usage: hf iclass eload f <filename>");
PrintAndLog("");
PrintAndLog("Example: hf iclass eload f iclass_tagdump-aa162d30f8ff12f1.bin");
return 0;
}
int iclassEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
memcpy(c.d.asBytes, data, blocksCount * 16);
SendCommand(&c);
return 0;
}
int CmdHFiClassELoad(const char *Cmd)
{
char opt = param_getchar(Cmd, 0);
if (strlen(Cmd)<1 || opt == 'h')
return hf_iclass_eload_usage();
//File handling and reading
FILE *f;
char filename[FILE_PATH_SIZE];
if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0)
{
f = fopen(filename, "rb");
}else{
return hf_iclass_eload_usage();
}
if(!f) {
PrintAndLog("Failed to read from file '%s'", filename);
return 1;
}
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
uint8_t *dump = malloc(fsize);
size_t bytes_read = fread(dump, 1, fsize, f);
fclose(f);
//Validate
if (bytes_read < fsize)
{
prnlog("Error, could only read %d bytes (should be %d)",bytes_read, fsize );
free(dump);
return 1;
}
//Send to device
uint32_t bytes_sent = 0;
uint32_t bytes_remaining = bytes_read;
while(bytes_remaining > 0){
uint32_t bytes_in_packet = MIN(USB_CMD_DATA_SIZE, bytes_remaining);
UsbCommand c = {CMD_ICLASS_EML_MEMSET, {bytes_sent,bytes_in_packet,0}};
memcpy(c.d.asBytes, dump, bytes_in_packet);
SendCommand(&c);
bytes_remaining -= bytes_in_packet;
bytes_sent += bytes_in_packet;
}
free(dump);
PrintAndLog("Sent %d bytes of data to device emulator memory", bytes_sent);
return 0;
}
int usage_hf_iclass_decrypt()
{
PrintAndLog("Usage: hf iclass decrypt f <tagdump> o ");
PrintAndLog("");
PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
PrintAndLog("in the working directory. The file should be 16 bytes binary data");
PrintAndLog("");
PrintAndLog("example: hf iclass decrypt tagdump_12312342343.bin");
PrintAndLog("");
PrintAndLog("OBS! This is pretty stupid implementation, it tries to decrypt every block after block 6. ");
PrintAndLog("Correct behaviour would be to decrypt only the application areas where the key is valid,");
PrintAndLog("which is defined by the configuration block.");
return 1;
}
int readKeyfile(const char *filename, size_t len, uint8_t* buffer)
{
FILE *f = fopen(filename, "rb");
if(!f) {
PrintAndLog("Failed to read from file '%s'", filename);
return 1;
}
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
size_t bytes_read = fread(buffer, 1, len, f);
fclose(f);
if(fsize != len)
{
PrintAndLog("Warning, file size is %d, expected %d", fsize, len);
return 1;
}
if(bytes_read != len)
{
PrintAndLog("Warning, could only read %d bytes, expected %d" ,bytes_read, len);
return 1;
}
return 0;
}
int CmdHFiClassDecrypt(const char *Cmd)
{
uint8_t key[16] = { 0 };
if(readKeyfile("iclass_decryptionkey.bin", 16, key))
{
usage_hf_iclass_decrypt();
return 1;
}
PrintAndLog("Decryption file found... ");
char opt = param_getchar(Cmd, 0);
if (strlen(Cmd)<1 || opt == 'h')
return usage_hf_iclass_decrypt();
//Open the tagdump-file
FILE *f;
char filename[FILE_PATH_SIZE];
if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0)
{
f = fopen(filename, "rb");
}else{
return usage_hf_iclass_decrypt();
}
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
uint8_t enc_dump[8] = {0};
uint8_t *decrypted = malloc(fsize);
des3_context ctx = { DES_DECRYPT ,{ 0 } };
des3_set2key_dec( &ctx, key);
size_t bytes_read = fread(enc_dump, 1, 8, f);
//Use the first block (CSN) for filename
char outfilename[FILE_PATH_SIZE] = { 0 };
snprintf(outfilename,FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x-decrypted",
enc_dump[0],enc_dump[1],enc_dump[2],enc_dump[3],
enc_dump[4],enc_dump[5],enc_dump[6],enc_dump[7]);
size_t blocknum =0;
while(bytes_read == 8)
{
if(blocknum < 7)
{
memcpy(decrypted+(blocknum*8), enc_dump, 8);
}else{
des3_crypt_ecb(&ctx, enc_dump,decrypted +(blocknum*8) );
}
printvar("decrypted block", decrypted +(blocknum*8), 8);
bytes_read = fread(enc_dump, 1, 8, f);
blocknum++;
}
fclose(f);
saveFile(outfilename,"bin", decrypted, blocknum*8);
return 0;
}
int CmdHFiClass_iso14443A_write(const char *Cmd)
{
uint8_t readerType = 0;
uint8_t MAC[4]={0x00,0x00,0x00,0x00};
uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t blockNo=0;
uint8_t bldata[8]={0};
if (strlen(Cmd)<3)
{
PrintAndLog("Usage: hf iclass write <Key> <Block> <Data>");
PrintAndLog(" sample: hf iclass write 0011223344556677 10 AAAAAAAAAAAAAAAA");
return 0;
}
if (param_gethex(Cmd, 0, KEY, 16))
{
PrintAndLog("KEY must include 16 HEX symbols");
return 1;
}
blockNo = param_get8(Cmd, 1);
if (blockNo>32)
{
PrintAndLog("Error: Maximum number of blocks is 32 for iClass 2K Cards!");
return 1;
}
if (param_gethex(Cmd, 2, bldata, 8))
{
PrintAndLog("Block data must include 8 HEX symbols");
return 1;
}
UsbCommand c = {CMD_ICLASS_ISO14443A_WRITE, {0}};
SendCommand(&c);
UsbCommand resp;
if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
uint8_t isOK = resp.arg[0] & 0xff;
uint8_t * data = resp.d.asBytes;
memcpy(CSN,data,8);
memcpy(CCNR,data+8,8);
PrintAndLog("DEBUG: %s",sprint_hex(CSN,8));
PrintAndLog("DEBUG: %s",sprint_hex(CCNR,8));
PrintAndLog("isOk:%02x", isOK);
} else {
PrintAndLog("Command execute timeout");
}
diversifyKey(CSN,KEY, div_key);
PrintAndLog("Div Key: %s",sprint_hex(div_key,8));
doMAC(CCNR, 12,div_key, MAC);
UsbCommand c2 = {CMD_ICLASS_ISO14443A_WRITE, {readerType,blockNo}};
memcpy(c2.d.asBytes, bldata, 8);
memcpy(c2.d.asBytes+8, MAC, 4);
SendCommand(&c2);
if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
uint8_t isOK = resp.arg[0] & 0xff;
uint8_t * data = resp.d.asBytes;
if (isOK)
PrintAndLog("isOk:%02x data:%s", isOK, sprint_hex(data, 4));
else
PrintAndLog("isOk:%02x", isOK);
} else {
PrintAndLog("Command execute timeout");
}
return 0;
}
int CmdHFiClass_loclass(const char *Cmd)
{
char opt = param_getchar(Cmd, 0);
if (strlen(Cmd)<1 || opt == 'h') {
PrintAndLog("Usage: hf iclass loclass [options]");
PrintAndLog("Options:");
PrintAndLog("h Show this help");
PrintAndLog("t Perform self-test");
PrintAndLog("f <filename> Bruteforce iclass dumpfile");
PrintAndLog(" An iclass dumpfile is assumed to consist of an arbitrary number of");
PrintAndLog(" malicious CSNs, and their protocol responses");
PrintAndLog(" The the binary format of the file is expected to be as follows: ");
PrintAndLog(" <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
PrintAndLog(" <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
PrintAndLog(" <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
PrintAndLog(" ... totalling N*24 bytes");
return 0;
}
char fileName[255] = {0};
if(opt == 'f')
{
if(param_getstr(Cmd, 1, fileName) > 0)
{
return bruteforceFileNoKeys(fileName);
}else
{
PrintAndLog("You must specify a filename");
}
}
else if(opt == 't')
{
int errors = testCipherUtils();
errors += testMAC();
errors += doKeyTests(0);
errors += testElite();
if(errors)
{
prnlog("OBS! There were errors!!!");
}
return errors;
}
return 0;
}
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"list", CmdHFiClassList, 0, "[Deprecated] List iClass history"},
{"snoop", CmdHFiClassSnoop, 0, "Eavesdrop iClass communication"},
{"sim", CmdHFiClassSim, 0, "Simulate iClass tag"},
{"reader",CmdHFiClassReader, 0, "Read an iClass tag"},
{"replay",CmdHFiClassReader_Replay, 0, "Read an iClass tag via Reply Attack"},
{"dump", CmdHFiClassReader_Dump, 0, "Authenticate and Dump iClass tag"},
// {"write", CmdHFiClass_iso14443A_write, 0, "Authenticate and Write iClass block"},
{"loclass", CmdHFiClass_loclass, 1, "Use loclass to perform bruteforce of reader attack dump"},
{"eload", CmdHFiClassELoad, 0, "[experimental] Load data into iclass emulator memory"},
{"decrypt", CmdHFiClassDecrypt, 1, "Decrypt tagdump" },
{NULL, NULL, 0, NULL}
};
int CmdHFiClass(const char *Cmd)
{
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd)
{
CmdsHelp(CommandTable);
return 0;
}
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