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fix: 'hf 14a info' - ATS length sanity check added

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This commit is contained in:
iceman1001 2018-03-13 23:16:48 +01:00
parent 7e0455aa0c
commit fd7acc78f3
1 changed files with 6 additions and 4 deletions

10
client/cmdhf14a.c
View file

@ -414,9 +414,12 @@ int CmdHF14AInfo(const char *Cmd) {
tb1 = (card.ats[1] & 0x20) == 0x20;
tc1 = (card.ats[1] & 0x40) == 0x40;
int16_t fsci = card.ats[1] & 0x0f;
PrintAndLogEx(NORMAL, " - T0 : TA1 is%s present, TB1 is%s present, "
"TC1 is%s present, FSCI is %d (FSC = %ld)",
(ta1 ? "" : " NOT"), (tb1 ? "" : " NOT"), (tc1 ? "" : " NOT"),
(ta1 ? "" : " NOT"),
(tb1 ? "" : " NOT"),
(tc1 ? "" : " NOT"),
fsci,
fsci < 5 ? (fsci - 2) * 8 :
fsci < 8 ? (fsci - 3) * 32 :
@ -459,7 +462,7 @@ int CmdHF14AInfo(const char *Cmd) {
(card.ats[pos] & 0x02) ? "" : " NOT");
pos++;
}
if (card.ats[0] > pos) {
if (card.ats[0] > pos && card.ats[0] < card.ats_len - 2 ) {
char *tip = "";
if (card.ats[0] - pos >= 7) {
if (memcmp(card.ats + pos, "\xC1\x05\x2F\x2F\x01\xBC\xD6", 7) == 0) {
@ -471,8 +474,7 @@ int CmdHF14AInfo(const char *Cmd) {
PrintAndLogEx(NORMAL, " - HB : %s%s", sprint_hex(card.ats + pos, card.ats[0] - pos), tip);
if (card.ats[pos] == 0xC1) {
PrintAndLogEx(NORMAL, " c1 -> Mifare or (multiple) virtual cards of various type");
PrintAndLogEx(NORMAL, " %02x -> Length is %d bytes",
card.ats[pos + 1], card.ats[pos + 1]);
PrintAndLogEx(NORMAL, " %02x -> Length is %d bytes", card.ats[pos + 1], card.ats[pos + 1]);
switch (card.ats[pos + 2] & 0xf0) {
case 0x10: PrintAndLogEx(NORMAL, " 1x -> MIFARE DESFire"); break;
case 0x20: PrintAndLogEx(NORMAL, " 2x -> MIFARE Plus"); break;