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Fixed authentication read for iclass tear

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If the card flips to nonsecure mode during the tearoff of block 1, this read command will be stuck.
So we can disable auth completely when trying to read block 1 as that block doesn't require authentication anyway for reading operations.
This commit is contained in:
Antiklesys 2025-05-25 17:10:31 +08:00
commit d402903db5
1 changed files with 6 additions and 1 deletions
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7
client/src/cmdhficlass.c
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@ -3137,6 +3137,8 @@ static int CmdHFiClass_TearBlock(const char *Cmd) {
auth = false;
}
bool read_auth = auth;
// perform initial read here, repeat if failed or 00s
uint8_t data_read_orig[8] = {0};
uint8_t ff_data[8] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
@ -3218,7 +3220,10 @@ static int CmdHFiClass_TearBlock(const char *Cmd) {
goto out;
}
res = iclass_read_block_ex(key, blockno, keyType, elite, rawkey, use_replay, verbose, auth, shallow_mod, data_read, false);
if (blockno == 1){
read_auth = false;
}
res = iclass_read_block_ex(key, blockno, keyType, elite, rawkey, use_replay, verbose, read_auth, shallow_mod, data_read, false);
if (res == PM3_SUCCESS && !reread) {
if (memcmp(data_read, zeros, 8) == 0) {
reread = true;