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chg: unsigned byte can't be less than zero.

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iceman1001 2019-03-18 13:41:59 +01:00
parent 027cda47d2
commit dcec5627d1
1 changed files with 1 additions and 1 deletions
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2
armsrc/desfire_crypto.c
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@ -313,7 +313,7 @@ void *mifare_cryto_postprocess_data(desfiretag_t tag, void *data, size_t *nbytes
case AS_LEGACY:
if (communication_settings & MAC_VERIFY) {
*nbytes -= key_macing_length(key);
if (*nbytes <= 0) {
if (*nbytes == 0) {
*nbytes = -1;
res = NULL;
#ifdef WITH_DEBUG