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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
int
librecrypt_fill_with_random_(void *out, size_t n, ssize_t (*rng)(void *out, size_t n, void *user), void *user)
{
char *buf = out;
ssize_t r;
if (!rng)
rng = &librecrypt_rng_;
while (n) {
r = (*rng)(buf, n, user);
if (r <= 0) {
if (!r)
abort();
return -1;
}
buf = &buf[(size_t)r];
n -= (size_t)r;
}
return 0;
}
#else
static ssize_t
zero(void *out, size_t n, void *user)
{
(void) user;
memset(out, 0, n);
return (ssize_t)n;
}
static ssize_t
seq(void *out, size_t n, void *user)
{
unsigned char *restrict buf = out;
unsigned char *restrict num = user;
size_t i;
if (n > 64u)
n = 64u;
for (i = 0u; i < n; i++)
buf[i] = (*num)++;
return (ssize_t)n;
}
static ssize_t
next(void *out, size_t n, void *user)
{
unsigned char *restrict buf = out;
unsigned char *restrict num = user;
assert(n);
*buf = (*num)++;
return 1;
}
static ssize_t
failer(void *out, size_t n, void *user)
{
(void) out;
(void) n;
(void) user;
errno = EDOM;
return -1;
}
static ssize_t
zero_ret(void *out, size_t n, void *user)
{
(void) out;
(void) n;
(void) user;
return 0;
}
int
main(void)
{
unsigned char buf1[1024u];
unsigned char buf2[sizeof(buf1)];
unsigned char s;
size_t i;
int rv = 0;
INIT_TEST_ABORT();
SET_UP_ALARM();
EXPECT(librecrypt_fill_with_random_(buf1, sizeof(buf1), NULL, NULL) == 0);
EXPECT(librecrypt_fill_with_random_(buf2, sizeof(buf1), NULL, NULL) == 0);
EXPECT(memcmp(buf1, buf2, sizeof(buf1)));
memset(buf1, 99, sizeof(buf1));
errno = 0;
EXPECT(librecrypt_fill_with_random_(buf1, sizeof(buf1), &zero, NULL) == 0);
EXPECT(errno == 0);
for (s = 0u, i = 0u; i < sizeof(buf1); i++, s++)
EXPECT(!buf1[i]);
memset(buf1, 99, sizeof(buf1));
s = 0u;
errno = 0;
EXPECT(librecrypt_fill_with_random_(buf1, sizeof(buf1), &seq, &s) == 0);
EXPECT(errno == 0);
for (s = 0u, i = 0u; i < sizeof(buf1); i++, s++)
EXPECT(buf1[i] == s);
memset(buf1, 99, sizeof(buf1));
s = 0u;
errno = 0;
EXPECT(librecrypt_fill_with_random_(buf1, sizeof(buf1), &next, &s) == 0);
EXPECT(errno == 0);
for (s = 0u, i = 0u; i < sizeof(buf1); i++, s++)
EXPECT(buf1[i] == s);
memset(buf1, 99, sizeof(buf1));
s = 0u;
errno = 0;
EXPECT(librecrypt_fill_with_random_(buf1, sizeof(buf1), &failer, NULL) == -1);
EXPECT(errno == EDOM);
for (s = 0u, i = 0u; i < sizeof(buf1); i++, s++)
EXPECT(buf1[i] == 99);
EXPECT_ABORT(rv = librecrypt_fill_with_random_(buf1, sizeof(buf1), &zero_ret, NULL));
return rv;
}
#endif
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