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further cleanup

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Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-26 11:41:37 +00:00
parent 10ecf32e33
commit d1ba9bae03
3 changed files with 32 additions and 68 deletions
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util/libreboot-utils/lib/rand.c
+10 -52
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@@ -72,62 +72,20 @@
* or your program dies.
*/
#define MAX_ALLOC (2 << 16)
int
win_lottery(void) /* are u lucky? */
{
size_t size = rsize();
size_t size2 = rsize();
char *s = NULL;
if (size &&
size == size2 &&
size <= MAX_ALLOC << 1) {
if (!memcmp(s = mkrbuf(size << 1),
s + size, size))
size2 = 1; /* winner! */
else
size2 = 0;
} else {
return 0;
}
free_if_null(&s);
return (int)size2;
}
size_t
rsize(void)
{
size_t rval = 0;
/* clamp rand to prevent modulo bias */
size_t limit = SIZE_MAX - (SIZE_MAX % MAX_ALLOC);
do {
rset(&rval, sizeof(rval));
} while (rval >= limit);
return rval % MAX_ALLOC;
}
void *
rmalloc(size_t *rval)
{
/* clamp rand to prevent modulo bias */
size_t limit = SIZE_MAX - (SIZE_MAX % MAX_ALLOC);
return if_err(rval == NULL, EFAULT) ?
NULL : mkrstr(*rval = rsize(BUFSIZ));
}
if (if_err(rval == NULL, EFAULT))
return NULL;
size_t
rsize(size_t n)
{
size_t rval = SIZE_MAX;
for (; rval >= SIZE_MAX - (SIZE_MAX % n); rset(&rval, sizeof(rval)));
do {
rset(rval, sizeof(*rval));
} while (*rval >= limit || *rval == 0);
return mkrstr(*rval %= MAX_ALLOC);
return rval % n;
}
char *
@@ -157,7 +115,7 @@ mkrstr(size_t n) /* emulates spkmodem-decode */
void *
mkrbuf(size_t n)
{
void *buf;
void *buf = "";
if (n == 0)
err_no_cleanup(0, EPERM, "mkrbuf: zero-byte request");