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em: show bitflips

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This commit is contained in:
Philippe Teuwen 2020-10-16 00:11:52 +02:00
parent 275986e743
commit b589699c38
1 changed files with 12 additions and 5 deletions
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17
client/src/cmdlfem4x.c
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@ -1800,6 +1800,7 @@ static int CmdEM4x05Unlock(const char *Cmd) {
int exit_code = PM3_SUCCESS;
uint32_t word14 = 0, word15 = 0;
uint32_t word14b = 0, word15b = 0;
uint32_t tries = 0;
uint32_t soon = 0;
uint32_t late = 0;
@ -1902,8 +1903,6 @@ static int CmdEM4x05Unlock(const char *Cmd) {
unlock_reset(use_pwd, pwd, write_value, verbose);
uint32_t word14b = 0, word15b = 0;
// read after reset
res = EM4x05ReadWord_ext(14, pwd, use_pwd, &word14b);
if (res != PM3_SUCCESS) {
@ -1951,7 +1950,6 @@ static int CmdEM4x05Unlock(const char *Cmd) {
PrintAndLogEx(INFO, "Committing results...");
unlock_reset(use_pwd, pwd, write_value, verbose);
uint32_t word14b = 0, word15b = 0;
// read after reset
res = EM4x05ReadWord_ext(14, pwd, use_pwd, &word14b);
@ -2008,8 +2006,17 @@ static int CmdEM4x05Unlock(const char *Cmd) {
PrintAndLogEx(INFO, "----------------------------- " _CYAN_("exit") " ----------------------------------\n");
t1 = msclock() - t1;
PrintAndLogEx(SUCCESS, "\ntime in unlock " _YELLOW_("%.0f") " seconds\n", (float)t1 / 1000.0);
if (success)
PrintAndLogEx(INFO, "try " _YELLOW_("`lf em 4x05_dump`"));
if (success) {
uint32_t bitflips = search_value ^ word14b;
PrintAndLogEx(INFO, "Old protection word => " _YELLOW_("%08X"), search_value);
char bitstring[9] = {0};
for (int i=0; i < 8; i++) {
bitstring[i] = bitflips & (0xF << ((7-i) * 4)) ? 'x' : '.';
}
PrintAndLogEx(INFO, "Bitflips => %s", bitstring);
PrintAndLogEx(INFO, "New protection word => " _CYAN_("%08X") "\n", word14b);
PrintAndLogEx(INFO, "Try " _YELLOW_("`lf em 4x05_dump`"));
}
PrintAndLogEx(NORMAL, "");
return exit_code;
}