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sanity checks

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This commit is contained in:
iceman1001
2026-03-25 19:10:59 +07:00
parent 08f82ebea2
commit 8ce5366b9e
1 changed files with 17 additions and 1 deletions
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armsrc/mifarecmd.c
+17 -1
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@@ -363,8 +363,24 @@ out:
}
void MifareU3PassChkKeys(mful_3passchk_t *packet) {
uint8_t keysize = (packet->segment != 4) ? (MIFAREU3P_KEY_SIZE >> 2) : MIFAREU3P_KEY_SIZE;
// sanity checks
// All key reads must stay within data[]
if ((uint32_t)packet->nkeys * keysize > sizeof(packet->data)) {
reply_ng(CMD_HF_MIFAREU3P_CHKKEY, PM3_EINVARG, NULL, 0);
return;
}
// Segment must be a valid value (0-3 = quarter, 4 = full key)
if (packet->segment > 4) {
reply_ng(CMD_HF_MIFAREU3P_CHKKEY, PM3_EINVARG, NULL, 0);
return;
}
static uint8_t foundkeys = 0;
uint8_t keysize = packet->segment != 4 ? MIFAREU3P_KEY_SIZE / 4 : MIFAREU3P_KEY_SIZE;
int oldbg = g_dbglevel;
int res = PM3_ESOFT;