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/*
* Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <openssl/crypto.h>
#define perror_line() perror_line1(__LINE__)
#define perror_line1(l) perror_line2(l)
#define perror_line2(l) perror("failed " #l)
int main(int argc, char **argv)
{
#if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX)
char *p = NULL, *q = NULL, *r = NULL, *s = NULL;
s = OPENSSL_secure_malloc(20);
/* s = non-secure 20 */
if (s == NULL) {
perror_line();
return 1;
}
if (CRYPTO_secure_allocated(s)) {
perror_line();
return 1;
}
r = OPENSSL_secure_malloc(20);
/* r = non-secure 20, s = non-secure 20 */
if (r == NULL) {
perror_line();
return 1;
}
if (!CRYPTO_secure_malloc_init(4096, 32)) {
perror_line();
return 1;
}
if (CRYPTO_secure_allocated(r)) {
perror_line();
return 1;
}
p = OPENSSL_secure_malloc(20);
/* r = non-secure 20, p = secure 20, s = non-secure 20 */
if (!CRYPTO_secure_allocated(p)) {
perror_line();
return 1;
}
/* 20 secure -> 32-byte minimum allocaton unit */
if (CRYPTO_secure_used() != 32) {
perror_line();
return 1;
}
q = OPENSSL_malloc(20);
/* r = non-secure 20, p = secure 20, q = non-secure 20, s = non-secure 20 */
if (CRYPTO_secure_allocated(q)) {
perror_line();
return 1;
}
OPENSSL_secure_clear_free(s, 20);
s = OPENSSL_secure_malloc(20);
/* r = non-secure 20, p = secure 20, q = non-secure 20, s = secure 20 */
if (!CRYPTO_secure_allocated(s)) {
perror_line();
return 1;
}
/* 2 * 20 secure -> 64 bytes allocated */
if (CRYPTO_secure_used() != 64) {
perror_line();
return 1;
}
OPENSSL_secure_clear_free(p, 20);
/* 20 secure -> 32 bytes allocated */
if (CRYPTO_secure_used() != 32) {
perror_line();
return 1;
}
OPENSSL_free(q);
/* should not complete, as secure memory is still allocated */
if (CRYPTO_secure_malloc_done()) {
perror_line();
return 1;
}
if (!CRYPTO_secure_malloc_initialized()) {
perror_line();
return 1;
}
OPENSSL_secure_free(s);
/* secure memory should now be 0, so done should complete */
if (CRYPTO_secure_used() != 0) {
perror_line();
return 1;
}
if (!CRYPTO_secure_malloc_done()) {
perror_line();
return 1;
}
if (CRYPTO_secure_malloc_initialized()) {
perror_line();
return 1;
}
fprintf(stderr, "Possible infinite loop: allocate more than available\n");
if (!CRYPTO_secure_malloc_init(32768, 16)) {
perror_line();
return 1;
}
if (OPENSSL_secure_malloc((size_t)-1) != NULL) {
perror_line();
return 1;
}
if (!CRYPTO_secure_malloc_done()) {
perror_line();
return 1;
}
/*
* 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 (!CRYPTO_secure_malloc_init(16, 16) &&
CRYPTO_secure_malloc_initialized()) {
CRYPTO_secure_malloc_done();
perror_line();
return 1;
}
/*-
* 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) {
fprintf(stderr, "Possible infinite loop: 1<<31 limit\n");
if (CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4) == 0) {
perror_line();
} else if (!CRYPTO_secure_malloc_done()) {
perror_line();
return 1;
}
}
# endif
/* this can complete - it was not really secure */
OPENSSL_secure_free(r);
#else
/* Should fail. */
if (CRYPTO_secure_malloc_init(4096, 32)) {
perror_line();
return 1;
}
#endif
return 0;
}
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