github/RRG-Proxmark3
1
0
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-08-21 13:53:55 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

fix: shifting signed 32-bit value by 31 bits is undefined behaviour

Browse source
This commit is contained in:
Philippe Teuwen 2019-03-12 23:59:43 +01:00
commit d9308d912d
4 changed files with 7 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

6
client/cmdlft55xx.c
View file

@ -1882,7 +1882,7 @@ int CmdT55xxRecoverPW(const char *Cmd) {
// first try fliping each bit in the expected password
while (bit < 32) {
curr_password = orig_password ^ (1 << bit);
curr_password = orig_password ^ (1u << bit);
found = tryOnePassword(curr_password);
if (found == -1) return 0;
bit++;
@ -1897,7 +1897,7 @@ int CmdT55xxRecoverPW(const char *Cmd) {
// from low bit to high bit
bit = 0;
while (bit < 32) {
mask += (1 << bit);
mask += (1u << bit);
curr_password = orig_password & mask;
// if updated mask didn't change the password, don't try it again
if (prev_password == curr_password) {
@ -1916,7 +1916,7 @@ int CmdT55xxRecoverPW(const char *Cmd) {
bit = 0;
mask = 0xffffffff;
while (bit < 32) {
mask -= (1 << bit);
mask -= (1u << bit);
curr_password = orig_password & mask;
// if updated mask didn't change the password, don't try it again
if (prev_password == curr_password) {