int main(int argc, char **argv)
{
#if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX)
char *p = NULL, *q = NULL;
if (!CRYPTO_secure_malloc_init(4096, 32)) {
perror("failed");
return 1;
}
p = OPENSSL_secure_malloc(20);
if (!CRYPTO_secure_allocated(p)) {
perror("failed 1");
return 1;
}
q = OPENSSL_malloc(20);
if (CRYPTO_secure_allocated(q)) {
perror("failed 1");
return 1;
}
OPENSSL_secure_free(p);
OPENSSL_free(q);
CRYPTO_secure_malloc_done();
#else
/* Should fail. */
if (CRYPTO_secure_malloc_init(4096, 32)) {
perror("failed");
return 1;
}
#endif
return 0;
}
void CRYPTO_secure_clear_free(void *ptr, size_t num,
const char *file, int line)
{
#ifdef IMPLEMENTED
size_t actual_size;
if (ptr == NULL)
return;
if (!CRYPTO_secure_allocated(ptr)) {
OPENSSL_cleanse(ptr, num);
CRYPTO_free(ptr, file, line);
return;
}
CRYPTO_THREAD_write_lock(sec_malloc_lock);
actual_size = sh_actual_size(ptr);
CLEAR(ptr, actual_size);
secure_mem_used -= actual_size;
sh_free(ptr);
CRYPTO_THREAD_unlock(sec_malloc_lock);
#else
if (ptr == NULL)
return;
OPENSSL_cleanse(ptr, num);
CRYPTO_free(ptr, file, line);
#endif /* IMPLEMENTED */
}
/*
* Allocate memory and initialize a new DRBG. The DRBG is allocated on
* the secure heap if |secure| is nonzero and the secure heap is enabled.
* The |parent|, if not NULL, will be used as random source for reseeding.
*
* Returns a pointer to the new DRBG instance on success, NULL on failure.
*/
static RAND_DRBG *rand_drbg_new(int secure,
int type,
unsigned int flags,
RAND_DRBG *parent)
{
RAND_DRBG *drbg = secure ?
OPENSSL_secure_zalloc(sizeof(*drbg)) : OPENSSL_zalloc(sizeof(*drbg));
if (drbg == NULL) {
RANDerr(RAND_F_RAND_DRBG_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
drbg->secure = secure && CRYPTO_secure_allocated(drbg);
drbg->fork_count = rand_fork_count;
drbg->parent = parent;
if (parent == NULL) {
drbg->reseed_interval = master_reseed_interval;
drbg->reseed_time_interval = master_reseed_time_interval;
} else {
drbg->reseed_interval = slave_reseed_interval;
drbg->reseed_time_interval = slave_reseed_time_interval;
}
if (RAND_DRBG_set(drbg, type, flags) == 0)
goto err;
if (parent != NULL) {
rand_drbg_lock(parent);
if (drbg->strength > parent->strength) {
/*
* We currently don't support the algorithm from NIST SP 800-90C
* 10.1.2 to use a weaker DRBG as source
*/
rand_drbg_unlock(parent);
RANDerr(RAND_F_RAND_DRBG_NEW, RAND_R_PARENT_STRENGTH_TOO_WEAK);
goto err;
}
rand_drbg_unlock(parent);
}
if (!RAND_DRBG_set_callbacks(drbg, rand_drbg_get_entropy,
rand_drbg_cleanup_entropy,
NULL, NULL))
goto err;
return drbg;
err:
if (drbg->secure)
OPENSSL_secure_free(drbg);
else
OPENSSL_free(drbg);
return NULL;
}
void CRYPTO_secure_free(void *ptr, const char *file, int line)
{
#ifdef OPENSSL_SECURE_MEMORY
size_t actual_size;
if (ptr == NULL)
return;
if (!CRYPTO_secure_allocated(ptr)) {
CRYPTO_free(ptr, file, line);
return;
}
CRYPTO_THREAD_write_lock(sec_malloc_lock);
actual_size = sh_actual_size(ptr);
CLEAR(ptr, actual_size);
secure_mem_used -= actual_size;
sh_free(ptr);
CRYPTO_THREAD_unlock(sec_malloc_lock);
#else
CRYPTO_free(ptr, file, line);
#endif /* OPENSSL_SECURE_MEMORY */
}
static int test_sec_mem(void)
{
#if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX)
int testresult = 0;
char *p = NULL, *q = NULL, *r = NULL, *s = NULL;
s = OPENSSL_secure_malloc(20);
/* s = non-secure 20 */
if (!TEST_ptr(s)
|| !TEST_false(CRYPTO_secure_allocated(s)))
goto end;
r = OPENSSL_secure_malloc(20);
/* r = non-secure 20, s = non-secure 20 */
if (!TEST_ptr(r)
|| !TEST_true(CRYPTO_secure_malloc_init(4096, 32))
|| !TEST_false(CRYPTO_secure_allocated(r)))
goto end;
p = OPENSSL_secure_malloc(20);
if (!TEST_ptr(p)
/* r = non-secure 20, p = secure 20, s = non-secure 20 */
|| !TEST_true(CRYPTO_secure_allocated(p))
/* 20 secure -> 32-byte minimum allocation unit */
|| !TEST_size_t_eq(CRYPTO_secure_used(), 32))
goto end;
q = OPENSSL_malloc(20);
if (!TEST_ptr(q))
goto end;
/* r = non-secure 20, p = secure 20, q = non-secure 20, s = non-secure 20 */
if (!TEST_false(CRYPTO_secure_allocated(q)))
goto end;
OPENSSL_secure_clear_free(s, 20);
s = OPENSSL_secure_malloc(20);
if (!TEST_ptr(s)
/* r = non-secure 20, p = secure 20, q = non-secure 20, s = secure 20 */
|| !TEST_true(CRYPTO_secure_allocated(s))
/* 2 * 20 secure -> 64 bytes allocated */
|| !TEST_size_t_eq(CRYPTO_secure_used(), 64))
goto end;
OPENSSL_secure_clear_free(p, 20);
p = NULL;
/* 20 secure -> 32 bytes allocated */
if (!TEST_size_t_eq(CRYPTO_secure_used(), 32))
goto end;
OPENSSL_free(q);
q = NULL;
/* should not complete, as secure memory is still allocated */
if (!TEST_false(CRYPTO_secure_malloc_done())
|| !TEST_true(CRYPTO_secure_malloc_initialized()))
goto end;
OPENSSL_secure_free(s);
s = NULL;
/* secure memory should now be 0, so done should complete */
if (!TEST_size_t_eq(CRYPTO_secure_used(), 0)
|| !TEST_true(CRYPTO_secure_malloc_done())
|| !TEST_false(CRYPTO_secure_malloc_initialized()))
goto end;
TEST_info("Possible infinite loop: allocate more than available");
if (!TEST_true(CRYPTO_secure_malloc_init(32768, 16)))
goto end;
TEST_ptr_null(OPENSSL_secure_malloc((size_t)-1));
TEST_true(CRYPTO_secure_malloc_done());
/*
* If init fails, then initialized should be false, if not, this
* could cause an infinite loop secure_malloc, but we don't test it
*/
if (TEST_false(CRYPTO_secure_malloc_init(16, 16)) &&
!TEST_false(CRYPTO_secure_malloc_initialized())) {
TEST_true(CRYPTO_secure_malloc_done());
goto end;
}
/*-
* There was also a possible infinite loop when the number of
* elements was 1<<31, as |int i| was set to that, which is a
* negative number. However, it requires minimum input values:
*
* CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4);
*
* Which really only works on 64-bit systems, since it took 16 GB
* secure memory arena to trigger the problem. It naturally takes
* corresponding amount of available virtual and physical memory
* for test to be feasible/representative. Since we can't assume
* that every system is equipped with that much memory, the test
* remains disabled. If the reader of this comment really wants
* to make sure that infinite loop is fixed, they can enable the
* code below.
*/
# if 0
/*-
* On Linux and BSD this test has a chance to complete in minimal
* time and with minimum side effects, because mlock is likely to
* fail because of RLIMIT_MEMLOCK, which is customarily [much]
* smaller than 16GB. In other words Linux and BSD users can be
* limited by virtual space alone...
*/
if (sizeof(size_t) > 4) {
TEST_info("Possible infinite loop: 1<<31 limit");
if (TEST_true(CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4) != 0))
TEST_true(CRYPTO_secure_malloc_done());
}
# endif
/* this can complete - it was not really secure */
testresult = 1;
end:
OPENSSL_secure_free(p);
OPENSSL_free(q);
OPENSSL_secure_free(r);
OPENSSL_secure_free(s);
return testresult;
#else
/* Should fail. */
return TEST_false(CRYPTO_secure_malloc_init(4096, 32));
#endif
}
/*
* Allocate memory and initialize a new DRBG. The DRBG is allocated on
* the secure heap if |secure| is nonzero and the secure heap is enabled.
* The |parent|, if not NULL, will be used as random source for reseeding.
*
* Returns a pointer to the new DRBG instance on success, NULL on failure.
*/
static RAND_DRBG *rand_drbg_new(int secure,
int type,
unsigned int flags,
RAND_DRBG *parent)
{
RAND_DRBG *drbg = secure ?
OPENSSL_secure_zalloc(sizeof(*drbg)) : OPENSSL_zalloc(sizeof(*drbg));
if (drbg == NULL) {
RANDerr(RAND_F_RAND_DRBG_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
drbg->secure = secure && CRYPTO_secure_allocated(drbg);
drbg->fork_count = rand_fork_count;
drbg->parent = parent;
if (parent == NULL) {
drbg->get_entropy = rand_drbg_get_entropy;
drbg->cleanup_entropy = rand_drbg_cleanup_entropy;
#ifndef RAND_DRBG_GET_RANDOM_NONCE
drbg->get_nonce = rand_drbg_get_nonce;
drbg->cleanup_nonce = rand_drbg_cleanup_nonce;
#endif
drbg->reseed_interval = master_reseed_interval;
drbg->reseed_time_interval = master_reseed_time_interval;
} else {
drbg->get_entropy = rand_drbg_get_entropy;
drbg->cleanup_entropy = rand_drbg_cleanup_entropy;
/*
* Do not provide nonce callbacks, the child DRBGs will
* obtain their nonce using random bits from the parent.
*/
drbg->reseed_interval = slave_reseed_interval;
drbg->reseed_time_interval = slave_reseed_time_interval;
}
if (RAND_DRBG_set(drbg, type, flags) == 0)
goto err;
if (parent != NULL) {
rand_drbg_lock(parent);
if (drbg->strength > parent->strength) {
/*
* We currently don't support the algorithm from NIST SP 800-90C
* 10.1.2 to use a weaker DRBG as source
*/
rand_drbg_unlock(parent);
RANDerr(RAND_F_RAND_DRBG_NEW, RAND_R_PARENT_STRENGTH_TOO_WEAK);
goto err;
}
rand_drbg_unlock(parent);
}
return drbg;
err:
if (drbg->secure)
OPENSSL_secure_free(drbg);
else
OPENSSL_free(drbg);
return NULL;
}