You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
26 lines
459 B
26 lines
459 B
#include <string.h>
|
|
|
|
/* Implements a constant time version of strcmp()
|
|
* Will return 1 if a and b are equal, 0 if they are not */
|
|
int slow_equals(const char* a, const char* b)
|
|
{
|
|
size_t lena, lenb, diff, i;
|
|
lena = strlen(a);
|
|
lenb = strlen(b);
|
|
diff = strlen(a) ^ strlen(b);
|
|
|
|
for(i=0; i<lena && i<lenb; i++)
|
|
{
|
|
diff |= a[i] ^ b[i];
|
|
}
|
|
if (diff == 0)
|
|
{
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
|