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added basic atr decode

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merlokk 2018-12-07 19:58:22 +02:00
parent a86a60bd06
commit 384a277b43
1 changed files with 103 additions and 0 deletions
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103
client/cmdsmartcard.c
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@ -72,6 +72,106 @@ int usage_sm_brute(void) {
return 0;
}
static int PrintATR(uint8_t *atr, size_t atrlen) {
uint8_t vxor = 0;
for (int i = 1; i < atrlen; i++)
vxor ^= atr[i];
if (vxor)
PrintAndLogEx(WARNING, "Check summ error. Must be 0 but: 0x%02x", vxor);
else
PrintAndLogEx(INFO, "Check summ OK.");
if (atr[0] != 0x3b)
PrintAndLogEx(WARNING, "Not a direct convention: 0x%02x", atr[0]);
uint8_t T0 = atr[1];
uint8_t K = T0 & 0x0F;
uint8_t TD1 = 0;
uint8_t T1len = 0;
uint8_t TD1len = 0;
uint8_t TDilen = 0;
if (T0 & 0x10) {
PrintAndLog("TA1 (Maximum clock frequency, proposed bit duration): 0x%02x", atr[2 + T1len]);
T1len++;
}
if (T0 & 0x20) {
PrintAndLog("TB1 (Deprecated: VPP requirements): 0x%02x", atr[2 + T1len]);
T1len++;
}
if (T0 & 0x40) {
PrintAndLog("TC1 (Extra delay between bytes required by card): 0x%02x", atr[2 + T1len]);
T1len++;
}
if (T0 & 0x80) {
PrintAndLog("TD1 (First offered transmission protocol, presence of TA2..TD2): 0x%02x", atr[2 + T1len]);
TD1 = atr[2 + T1len];
T1len++;
if (TD1 & 0x10) {
PrintAndLog("TA2 (Specific protocol and parameters to be used after the ATR): 0x%02x", atr[2 + T1len + TD1len]);
TD1len++;
}
if (TD1 & 0x20) {
PrintAndLog("TB2 (Deprecated: VPP precise voltage requirement): 0x%02x", atr[2 + T1len + TD1len]);
TD1len++;
}
if (TD1 & 0x40) {
PrintAndLog("TC2 (Maximum waiting time for protocol T=0): 0x%02x", atr[2 + T1len + TD1len]);
TD1len++;
}
if (TD1 & 0x80) {
PrintAndLog("TD2 (A supported protocol or more global parameters, presence of TA3..TD3): 0x%02x", atr[2 + T1len + TD1len]);
uint8_t TDi = atr[2 + T1len + TD1len];
TD1len++;
bool nextCycle = true;
uint8_t vi = 3;
while (nextCycle) {
nextCycle = false;
if (TDi & 0x10) {
PrintAndLog("TA%d: 0x%02x", vi, atr[2 + T1len + TD1len + TDilen]);
TDilen++;
}
if (TDi & 0x20) {
PrintAndLog("TB%d: 0x%02x", vi, atr[2 + T1len + TD1len + TDilen]);
TDilen++;
}
if (TDi & 0x40) {
PrintAndLog("TC%d: 0x%02x", vi, atr[2 + T1len + TD1len + TDilen]);
TDilen++;
}
if (TDi & 0x80) {
PrintAndLog("TD%d: 0x%02x", vi, atr[2 + T1len + TD1len + TDilen]);
TDi = atr[2 + T1len + TD1len + TDilen];
TDilen++;
nextCycle = true;
vi++;
}
}
}
}
uint8_t calen = 2 + T1len + TD1len + TDilen + K;
if (atrlen != calen && atrlen != calen + 1) // may be CRC
PrintAndLogEx(ERR, "ATR length error. len: %d, T1len: %d, TD1len: %d, TDilen: %d, K: %d", atrlen, T1len, TD1len, TDilen, K);
else
PrintAndLogEx(INFO, "ATR length OK.");
PrintAndLog("Historical bytes len: 0x%02x", K);
if (K > 0)
PrintAndLog("The format of historical bytes: %02x", atr[2 + T1len + TD1len + TDilen]);
if (K > 1)
PrintAndLog("Historical bytes: %s", sprint_hex(&atr[2 + T1len + TD1len + TDilen], K));
return 0;
}
static bool smart_select(bool silent) {
UsbCommand c = {CMD_SMART_ATR, {0, 0, 0}};
clearCommandBuffer();
@ -475,6 +575,9 @@ int CmdSmartInfo(const char *Cmd){
PrintAndLogEx(INFO, "ISO76183 ATR : %s", sprint_hex(card.atr, card.atr_len));
PrintAndLogEx(INFO, "look up ATR");
PrintAndLogEx(INFO, "http://smartcard-atr.appspot.com/parse?ATR=%s", sprint_hex_inrow(card.atr, card.atr_len) );
PrintAndLogEx(INFO, "");
PrintAndLogEx(INFO, "ATR:");
PrintATR(card.atr, card.atr_len);
return 0;
}