RfidResearchGroup/proxmark3
1
1
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2024-09-20 15:26:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

coverity fix 279922

Browse source
This commit is contained in:
iceman1001 2020-04-29 20:09:23 +02:00
parent 1410d4d9b5
commit f1f3742333
1 changed files with 7 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
armsrc/desfire_crypto.c
View file

@ -36,6 +36,7 @@
#include "printf.h"
#include "iso14443a.h"
#include "dbprint.h"
#include "BigBuf.h"
#ifndef AddCrc14A
# define AddCrc14A(data, len) compute_crc(CRC_14443_A, (data), (len), (data)+(len), (data)+(len)+1)
@ -282,7 +283,10 @@ void cmac_generate_subkeys(desfirekey_t key) {
void cmac(const desfirekey_t key, uint8_t *ivect, const uint8_t *data, size_t len, uint8_t *cmac) {
int kbs = key_block_size(key);
uint8_t *buffer = malloc(padded_data_length(len, kbs));
if (kbs == 0)
return;
uint8_t *buffer = BigBuf_malloc(padded_data_length(len, kbs));
memcpy(buffer, data, len);
@ -299,7 +303,7 @@ void cmac(const desfirekey_t key, uint8_t *ivect, const uint8_t *data, size_t le
mifare_cypher_blocks_chained(NULL, key, ivect, buffer, len, MCD_SEND, MCO_ENCYPHER);
memcpy(cmac, ivect, kbs);
free(buffer);
//free(buffer);
}
size_t key_block_size(const desfirekey_t key) {
@ -538,7 +542,7 @@ void *mifare_cryto_postprocess_data(desfiretag_t tag, void *data, size_t *nbytes
}
size_t edl = enciphered_data_length(tag, *nbytes - 1, communication_settings);
edata = malloc(edl);
edata = BigBuf_malloc(edl);
memcpy(edata, data, *nbytes - 1);
memset((uint8_t *)edata + *nbytes - 1, 0, edl - *nbytes + 1);