mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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566 lines
17 KiB
C
566 lines
17 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) 2018 iceman
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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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// Proxmark3 RDV40 Flash memory commands
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//-----------------------------------------------------------------------------
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#include "cmdflashmem.h"
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#include "rsa.h"
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#include "sha1.h"
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#define MCK 48000000
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//#define FLASH_BAUD 24000000
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#define FLASH_MINFAST 24000000 //33000000
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#define FLASH_BAUD MCK/2
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#define FLASH_FASTBAUD MCK
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#define FLASH_MINBAUD FLASH_FASTBAUD
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#define FASTFLASH (FLASHMEM_SPIBAUDRATE > FLASH_MINFAST)
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static int CmdHelp(const char *Cmd);
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int usage_flashmem_spibaud(void){
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PrintAndLogEx(NORMAL, "Usage: mem spibaud [h] <baudrate>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h this help");
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PrintAndLogEx(NORMAL, " <baudrate> SPI baudrate in MHz [24|48]");
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PrintAndLogEx(NORMAL, " ");
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PrintAndLogEx(NORMAL, " If >= 24Mhz, FASTREADS instead of READS instruction will be used.");
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PrintAndLogEx(NORMAL, " Reading Flash ID will virtually always fail under 48Mhz setting");
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PrintAndLogEx(NORMAL, " Unless you know what you are doing, please stay at 24Mhz");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " mem spibaud 48");
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return 0;
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}
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int usage_flashmem_read(void){
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PrintAndLogEx(NORMAL, "Read flash memory on device");
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PrintAndLogEx(NORMAL, "Usage: mem read o <offset> l <len>");
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PrintAndLogEx(NORMAL, " o <offset> : offset in memory");
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PrintAndLogEx(NORMAL, " l <len> : length");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " mem read o 0 l 32"); // read 32 bytes starting at offset 0
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PrintAndLogEx(NORMAL, " mem read o 1024 l 10"); // read 10 bytes starting at offset 1024
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return 0;
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}
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int usage_flashmem_load(void){
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PrintAndLogEx(NORMAL, "Loads binary file into flash memory on device");
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PrintAndLogEx(NORMAL, "Usage: mem load o <offset> f <file name>");
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PrintAndLogEx(NORMAL, " o <offset> : offset in memory");
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PrintAndLogEx(NORMAL, " f <filename> : file name");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " mem load f myfile"); // upload file myfile at default offset 0
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PrintAndLogEx(NORMAL, " mem load f myfile o 1024"); // upload file myfile at offset 1024
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return 0;
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}
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int usage_flashmem_save(void){
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PrintAndLogEx(NORMAL, "Saves flash memory on device into the file");
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PrintAndLogEx(NORMAL, " Usage: mem save o <offset> l <length> f <file name>");
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PrintAndLogEx(NORMAL, " o <offset> : offset in memory");
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PrintAndLogEx(NORMAL, " l <length> : length");
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PrintAndLogEx(NORMAL, " f <filename> : file name");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " mem save f myfile"); // download whole flashmem to file myfile
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PrintAndLogEx(NORMAL, " mem save f myfile l 4096"); // download 4096 bytes from default offset 0 to file myfile
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PrintAndLogEx(NORMAL, " mem save f myfile o 1024 l 4096"); // downlowd 4096 bytes from offset 1024 to file myfile
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return 0;
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}
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int usage_flashmem_wipe(void){
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PrintAndLogEx(WARNING, "[OBS] use with caution.");
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PrintAndLogEx(NORMAL, "Wipe flash memory on device, which fills memory with 0xFF\n");
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PrintAndLogEx(NORMAL, " Usage: mem wipe p <page>");
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PrintAndLogEx(NORMAL, " p <page> : 0,1,2 page memory");
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// PrintAndLogEx(NORMAL, " i : inital total wipe");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " mem wipe "); // wipe page 0,1,2
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PrintAndLogEx(NORMAL, " mem wipe p 0"); // wipes first page.
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return 0;
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}
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int usage_flashmem_info(void){
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PrintAndLogEx(NORMAL, "Collect signature and verify it from flash memory\n");
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PrintAndLogEx(NORMAL, " Usage: mem info [h|s|w]");
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PrintAndLogEx(NORMAL, " s : create a signature");
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PrintAndLogEx(NORMAL, " w : write signature to flash memory");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " mem info");
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PrintAndLogEx(NORMAL, " mem info s");
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return 0;
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}
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int CmdFlashMemRead(const char *Cmd) {
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uint8_t cmdp = 0;
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bool errors = false;
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uint32_t start_index = 0, len = 0;
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while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
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switch (tolower(param_getchar(Cmd, cmdp))) {
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case 'o':
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start_index = param_get32ex(Cmd, cmdp+1, 0, 10);
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cmdp += 2;
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break;
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case 'l':
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len = param_get32ex(Cmd, cmdp+1, 0, 10);
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cmdp += 2;
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break;
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case 'h':
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return usage_flashmem_read();
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default:
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PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
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errors = true;
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break;
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}
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}
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//Validations
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if (errors || cmdp == 0 ) return usage_flashmem_read();
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if (start_index + len > FLASH_MEM_MAX_SIZE) {
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PrintAndLogDevice(WARNING, "error, start_index + length is larger than available memory");
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return 1;
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}
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UsbCommand c = {CMD_FLASHMEM_READ, {start_index, len, 0}};
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clearCommandBuffer();
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SendCommand(&c);
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return 0;
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}
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int CmdFlashmemSpiBaudrate(const char *Cmd) {
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char ctmp = tolower(param_getchar(Cmd, 0));
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if (strlen(Cmd) < 1 || ctmp == 'h') return usage_flashmem_spibaud();
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uint32_t baudrate = param_get32ex(Cmd, 0, 0, 10);
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baudrate = baudrate * 1000000;
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if (baudrate != FLASH_BAUD && baudrate != FLASH_MINBAUD ) return usage_flashmem_spibaud();
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UsbCommand c = {CMD_FLASHMEM_SET_SPIBAUDRATE, {baudrate, 0, 0}};
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SendCommand(&c);
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return 0;
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}
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int CmdFlashMemLoad(const char *Cmd){
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FILE *f;
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char filename[FILE_PATH_SIZE] = {0};
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uint8_t cmdp = 0;
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bool errors = false;
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uint32_t start_index = 0;
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while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
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switch (tolower(param_getchar(Cmd, cmdp))) {
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case 'o':
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start_index = param_get32ex(Cmd, cmdp+1, 0, 10);
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cmdp += 2;
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break;
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case 'f':
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//File handling and reading
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if ( param_getstr(Cmd, cmdp+1, filename, FILE_PATH_SIZE) >= FILE_PATH_SIZE ) {
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PrintAndLogEx(FAILED, "Filename too long");
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errors = true;
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break;
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}
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cmdp += 2;
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break;
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case 'h':
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return usage_flashmem_load();
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default:
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PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
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errors = true;
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break;
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}
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}
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//Validations
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if (errors || cmdp == 0 ) return usage_flashmem_load();
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// load file
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f = fopen(filename, "rb");
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if ( !f ){
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PrintAndLogEx(FAILED, "File: %s: not found or locked.", filename);
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return 1;
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}
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// get filesize in order to malloc memory
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fseek(f, 0, SEEK_END);
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long fsize = ftell(f);
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fseek(f, 0, SEEK_SET);
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if (fsize < 0) {
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PrintAndLogDevice(WARNING, "error, when getting filesize");
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fclose(f);
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return 1;
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}
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if (fsize > FLASH_MEM_MAX_SIZE) {
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PrintAndLogDevice(WARNING, "error, filesize is larger than available memory");
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fclose(f);
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return 1;
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}
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uint8_t *dump = calloc(fsize, sizeof(uint8_t));
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if (!dump) {
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PrintAndLogDevice(WARNING, "error, cannot allocate memory ");
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fclose(f);
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return 1;
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}
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size_t bytes_read = fread(dump, 1, fsize, f);
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if (f)
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fclose(f);
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//Send to device
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uint32_t bytes_sent = 0;
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uint32_t bytes_remaining = bytes_read;
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while (bytes_remaining > 0){
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uint32_t bytes_in_packet = MIN(FLASH_MEM_BLOCK_SIZE, bytes_remaining);
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UsbCommand c = {CMD_FLASHMEM_WRITE, {start_index + bytes_sent, bytes_in_packet, 0}};
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memcpy(c.d.asBytes, dump + bytes_sent, bytes_in_packet);
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clearCommandBuffer();
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SendCommand(&c);
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bytes_remaining -= bytes_in_packet;
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bytes_sent += bytes_in_packet;
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UsbCommand resp;
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if ( !WaitForResponseTimeout(CMD_ACK, &resp, 2000) ) {
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PrintAndLogEx(WARNING, "timeout while waiting for reply.");
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free(dump);
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return 1;
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}
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uint8_t isok = resp.arg[0] & 0xFF;
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if (!isok)
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PrintAndLogEx(FAILED, "Flash write fail [offset %u]", bytes_sent);
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}
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free(dump);
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PrintAndLogEx(SUCCESS, "Wrote %u bytes to offset %u", bytes_read, start_index);
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return 0;
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}
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int CmdFlashMemSave(const char *Cmd){
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char filename[FILE_PATH_SIZE] = {0};
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uint8_t cmdp = 0;
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bool errors = false;
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uint32_t start_index = 0, len = FLASH_MEM_MAX_SIZE;
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while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
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switch (tolower(param_getchar(Cmd, cmdp))) {
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case 'h': return usage_flashmem_save();
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case 'l':
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len = param_get32ex(Cmd, cmdp+1, FLASH_MEM_MAX_SIZE, 10);
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cmdp += 2;
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break;
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case 'o':
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start_index = param_get32ex(Cmd, cmdp+1, 0, 10);
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cmdp += 2;
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break;
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case 'f':
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//File handling
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if ( param_getstr(Cmd, cmdp+1, filename, FILE_PATH_SIZE) >= FILE_PATH_SIZE ) {
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PrintAndLogEx(FAILED, "Filename too long");
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errors = true;
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break;
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}
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cmdp += 2;
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break;
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default:
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PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
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errors = true;
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break;
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}
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}
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//Validations
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if (errors || cmdp == 0 ) return usage_flashmem_save();
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uint8_t* dump = calloc(len, sizeof(uint8_t));
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if (!dump) {
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PrintAndLogDevice(WARNING, "error, cannot allocate memory ");
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return 1;
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}
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PrintAndLogEx(NORMAL, "downloading %u bytes from flashmem", len);
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if ( !GetFromDevice(FLASH_MEM, dump, len, start_index, NULL, -1, true) ) {
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PrintAndLogEx(FAILED, "ERROR; downloading flashmem");
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free(dump);
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return 1;
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}
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saveFile(filename, "bin", dump, len);
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saveFileEML(filename, "eml", dump, len, 16);
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free(dump);
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return 0;
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}
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int CmdFlashMemWipe(const char *Cmd){
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uint8_t cmdp = 0;
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bool errors = false;
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bool initalwipe = false;
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uint8_t page = 0;
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while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
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switch (tolower(param_getchar(Cmd, cmdp))) {
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case 'h': return usage_flashmem_wipe();
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case 'p':
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page = param_get8ex(Cmd, cmdp+1, 0, 10);
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if ( page > 2 ) {
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PrintAndLogEx(WARNING, "page must be 0, 1 or 2");
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errors = true;
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break;
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}
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cmdp += 2;
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break;
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case 'i':
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initalwipe = true;
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cmdp++;
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break;
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default:
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PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
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errors = true;
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break;
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}
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}
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//Validations
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if (errors || cmdp == 0 ) return usage_flashmem_wipe();
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UsbCommand c = {CMD_FLASHMEM_WIPE, {page, initalwipe, 0}};
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clearCommandBuffer();
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SendCommand(&c);
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UsbCommand resp;
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if ( !WaitForResponseTimeout(CMD_ACK, &resp, 8000) ) {
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PrintAndLogEx(WARNING, "timeout while waiting for reply.");
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return 1;
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}
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uint8_t isok = resp.arg[0] & 0xFF;
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if (isok)
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PrintAndLogEx(SUCCESS, "Flash WIPE ok");
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else
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PrintAndLogEx(FAILED, "Flash WIPE failed");
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return 0;
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}
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int CmdFlashMemInfo(const char *Cmd){
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uint8_t sha_hash[20] = {0};
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rsa_context rsa;
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uint8_t cmdp = 0;
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bool errors = false, shall_write = false, shall_sign = false;
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while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
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switch (tolower(param_getchar(Cmd, cmdp))) {
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case 'h': return usage_flashmem_info();
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case 's': {
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shall_sign = true;
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cmdp++;
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break;
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}
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case 'w':
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shall_write = true;
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cmdp++;
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break;
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default:
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PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
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errors = true;
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break;
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}
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}
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//Validations
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if (errors ) return usage_flashmem_info();
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UsbCommand c = {CMD_FLASHMEM_INFO, {0, 0, 0}};
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clearCommandBuffer();
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SendCommand(&c);
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UsbCommand resp;
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if ( !WaitForResponseTimeout(CMD_ACK, &resp, 2500) ) {
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PrintAndLogEx(WARNING, "timeout while waiting for reply.");
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return 1;
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}
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uint8_t isok = resp.arg[0] & 0xFF;
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if (!isok) {
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PrintAndLogEx(FAILED, "failed");
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return 1;
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}
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// validate signature here
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rdv40_validation_t mem;
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memcpy(&mem, (rdv40_validation_t *)resp.d.asBytes, sizeof(rdv40_validation_t));
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// Flash ID hash (sha1)
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sha1( mem.flashid, sizeof(mem.flashid), sha_hash );
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// print header
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PrintAndLogEx(INFO, "\n--- Flash memory Information ---------");
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PrintAndLogEx(INFO, "-------------------------------------------------------------");
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PrintAndLogEx(INFO, "ID | %s", sprint_hex(mem.flashid, sizeof(mem.flashid) ));
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PrintAndLogEx(INFO, "SHA1 | %s", sprint_hex(sha_hash, sizeof(sha_hash)));
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PrintAndLogEx(INFO, "RSA SIGNATURE |");
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print_hex_break( mem.signature, sizeof(mem.signature), 32);
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//-------------------------------------------------------------------------------
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// Example RSA-1024 keypair, for test purposes (from common/polarssl/rsa.c)
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//
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// public key modulus N
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#define RSA_N "9292758453063D803DD603D5E777D788" \
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"8ED1D5BF35786190FA2F23EBC0848AEA" \
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"DDA92CA6C3D80B32C4D109BE0F36D6AE" \
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"7130B9CED7ACDF54CFC7555AC14EEBAB" \
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"93A89813FBF3C4F8066D2D800F7C38A8" \
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"1AE31942917403FF4946B0A83D3D3E05" \
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"EE57C6F5F5606FB5D4BC6CD34EE0801A" \
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"5E94BB77B07507233A0BC7BAC8F90F79"
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// public key Exponent E
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#define RSA_E "10001"
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// private key Exponent D
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#define RSA_D "24BF6185468786FDD303083D25E64EFC" \
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"66CA472BC44D253102F8B4A9D3BFA750" \
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"91386C0077937FE33FA3252D28855837" \
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"AE1B484A8A9A45F7EE8C0C634F99E8CD" \
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"DF79C5CE07EE72C7F123142198164234" \
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"CABB724CF78B8173B9F880FC86322407" \
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"AF1FEDFDDE2BEB674CA15F3E81A1521E" \
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"071513A1E85B5DFA031F21ECAE91A34D"
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// prime P
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#define RSA_P "C36D0EB7FCD285223CFB5AABA5BDA3D8" \
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"2C01CAD19EA484A87EA4377637E75500" \
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"FCB2005C5C7DD6EC4AC023CDA285D796" \
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"C3D9E75E1EFC42488BB4F1D13AC30A57"
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// prime Q
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#define RSA_Q "C000DF51A7C77AE8D7C7370C1FF55B69" \
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"E211C2B9E5DB1ED0BF61D0D9899620F4" \
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"910E4168387E3C30AA1E00C339A79508" \
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"8452DD96A9A5EA5D9DCA68DA636032AF"
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#define RSA_DP "C1ACF567564274FB07A0BBAD5D26E298" \
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"3C94D22288ACD763FD8E5600ED4A702D" \
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"F84198A5F06C2E72236AE490C93F07F8" \
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"3CC559CD27BC2D1CA488811730BB5725"
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#define RSA_DQ "4959CBF6F8FEF750AEE6977C155579C7" \
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"D8AAEA56749EA28623272E4F7D0592AF" \
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"7C1F1313CAC9471B5C523BFE592F517B" \
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"407A1BD76C164B93DA2D32A383E58357"
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#define RSA_QP "9AE7FBC99546432DF71896FC239EADAE" \
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"F38D18D2B2F0E2DD275AA977E2BF4411" \
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"F5A3B2A5D33605AEBBCCBA7FEB9F2D2F" \
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"A74206CEC169D74BF5A8C50D6F48EA08"
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#define KEY_LEN 128
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rsa_init(&rsa, RSA_PKCS_V15, 0);
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rsa.len = KEY_LEN;
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mpi_read_string( &rsa.N , 16, RSA_N );
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mpi_read_string( &rsa.E , 16, RSA_E );
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mpi_read_string( &rsa.D , 16, RSA_D );
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mpi_read_string( &rsa.P , 16, RSA_P );
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mpi_read_string( &rsa.Q , 16, RSA_Q );
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mpi_read_string( &rsa.DP, 16, RSA_DP );
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mpi_read_string( &rsa.DQ, 16, RSA_DQ );
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mpi_read_string( &rsa.QP, 16, RSA_QP );
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PrintAndLogEx(INFO, "KEY length | %d", KEY_LEN);
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bool is_keyok = ( rsa_check_pubkey( &rsa ) == 0 || rsa_check_privkey( &rsa ) == 0 );
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if (is_keyok)
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PrintAndLogEx(SUCCESS, "RSA key validation ok");
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else
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PrintAndLogEx(FAILED, "RSA key validation failed");
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//
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uint8_t from_device[KEY_LEN];
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uint8_t sign[KEY_LEN];
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// to be verified
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memcpy(from_device, mem.signature, KEY_LEN);
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// to be signed (all zeros
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memset(sign, 0, KEY_LEN);
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// Signing (private key)
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if (shall_sign) {
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int is_signed = rsa_pkcs1_sign( &rsa, NULL, NULL, RSA_PRIVATE, SIG_RSA_SHA1, 20, sha_hash, sign );
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if (is_signed == 0)
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PrintAndLogEx(SUCCESS, "RSA Signing ok");
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else
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PrintAndLogEx(FAILED, "RSA Signing failed");
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if (shall_write) {
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// save to mem
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c = (UsbCommand){CMD_FLASHMEM_WRITE, {FLASH_MEM_SIGNATURE_OFFSET, FLASH_MEM_SIGNATURE_LEN, 0}};
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memcpy(c.d.asBytes, sign, sizeof(sign));
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clearCommandBuffer();
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SendCommand(&c);
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if ( !WaitForResponseTimeout(CMD_ACK, &resp, 2000) ) {
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PrintAndLogEx(WARNING, "timeout while waiting for reply.");
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} else {
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if (!resp.arg[0])
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PrintAndLogEx(FAILED, "Writing signature failed");
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else
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PrintAndLogEx(SUCCESS, "Writing signature ok [offset: %u]", FLASH_MEM_SIGNATURE_OFFSET);
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}
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}
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PrintAndLogEx(INFO, "Signed | ");
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print_hex_break( sign, sizeof(sign), 32);
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}
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// Verify (public key)
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int is_verified = rsa_pkcs1_verify( &rsa, RSA_PUBLIC, SIG_RSA_SHA1, 20, sha_hash, from_device );
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if (is_verified == 0)
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PrintAndLogEx(SUCCESS, "RSA Verification ok");
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else
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PrintAndLogEx(FAILED, "RSA Verification failed");
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rsa_free(&rsa);
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return 0;
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}
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static command_t CommandTable[] = {
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{"help", CmdHelp, 1, "This help"},
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{"spibaud", CmdFlashmemSpiBaudrate, 1, "Set Flash memory Spi baudrate [rdv40]"},
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{"read", CmdFlashMemRead, 1, "Read Flash memory [rdv40]"},
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{"info", CmdFlashMemInfo, 1, "Flash memory information [rdv40]"},
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{"load", CmdFlashMemLoad, 1, "Load data into flash memory [rdv40]"},
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{"save", CmdFlashMemSave, 1, "Save data from flash memory [rdv40]"},
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{"wipe", CmdFlashMemWipe, 1, "Wipe data from flash memory [rdv40]"},
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{NULL, NULL, 0, NULL}
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};
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int CmdFlashMem(const char *Cmd) {
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clearCommandBuffer();
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CmdsParse(CommandTable, Cmd);
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return 0;
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}
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int CmdHelp(const char *Cmd) {
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CmdsHelp(CommandTable);
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return 0;
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}
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