2 * Copyright 2015-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/crypto.h>
14 static int test_sec_mem(void)
16 #if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX)
18 char *p = NULL, *q = NULL, *r = NULL, *s = NULL;
20 r = OPENSSL_secure_malloc(20);
21 /* r = non-secure 20 */
23 || !TEST_true(CRYPTO_secure_malloc_init(4096, 32))
24 || !TEST_false(CRYPTO_secure_allocated(r)))
26 p = OPENSSL_secure_malloc(20);
28 /* r = non-secure 20, p = secure 20 */
29 || !TEST_true(CRYPTO_secure_allocated(p))
30 /* 20 secure -> 32-byte minimum allocaton unit */
31 || !TEST_size_t_eq(CRYPTO_secure_used(), 32))
33 q = OPENSSL_malloc(20);
36 /* r = non-secure 20, p = secure 20, q = non-secure 20 */
37 if (!TEST_false(CRYPTO_secure_allocated(q)))
39 s = OPENSSL_secure_malloc(20);
41 /* r = non-secure 20, p = secure 20, q = non-secure 20, s = secure 20 */
42 || !TEST_true(CRYPTO_secure_allocated(s))
43 /* 2 * 20 secure -> 64 bytes allocated */
44 || !TEST_size_t_eq(CRYPTO_secure_used(), 64))
46 OPENSSL_secure_free(p);
48 /* 20 secure -> 32 bytes allocated */
49 if (!TEST_size_t_eq(CRYPTO_secure_used(), 32))
53 /* should not complete, as secure memory is still allocated */
54 if (!TEST_false(CRYPTO_secure_malloc_done())
55 || !TEST_true(CRYPTO_secure_malloc_initialized()))
57 OPENSSL_secure_free(s);
59 /* secure memory should now be 0, so done should complete */
60 if (!TEST_size_t_eq(CRYPTO_secure_used(), 0)
61 || !TEST_true(CRYPTO_secure_malloc_done())
62 || !TEST_false(CRYPTO_secure_malloc_initialized()))
65 TEST_info("Possible infinite loop: allocate more than available");
66 if (!TEST_true(CRYPTO_secure_malloc_init(32768, 16)))
68 TEST_ptr_null(OPENSSL_secure_malloc((size_t)-1));
69 TEST_true(CRYPTO_secure_malloc_done());
72 * If init fails, then initialized should be false, if not, this
73 * could cause an infinite loop secure_malloc, but we don't test it
75 if (TEST_false(CRYPTO_secure_malloc_init(16, 16)) &&
76 !TEST_false(CRYPTO_secure_malloc_initialized())) {
77 TEST_true(CRYPTO_secure_malloc_done());
82 * There was also a possible infinite loop when the number of
83 * elements was 1<<31, as |int i| was set to that, which is a
84 * negative number. However, it requires minimum input values:
86 * CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4);
88 * Which really only works on 64-bit systems, since it took 16 GB
89 * secure memory arena to trigger the problem. It naturally takes
90 * corresponding amount of available virtual and physical memory
91 * for test to be feasible/representative. Since we can't assume
92 * that every system is equipped with that much memory, the test
93 * remains disabled. If the reader of this comment really wants
94 * to make sure that infinite loop is fixed, they can enable the
99 * On Linux and BSD this test has a chance to complete in minimal
100 * time and with minimum side effects, because mlock is likely to
101 * fail because of RLIMIT_MEMLOCK, which is customarily [much]
102 * smaller than 16GB. In other words Linux and BSD users can be
103 * limited by virtual space alone...
105 if (sizeof(size_t) > 4) {
106 TEST_info("Possible infinite loop: 1<<31 limit");
107 if (TEST_true(CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4) != 0))
108 TEST_true(CRYPTO_secure_malloc_done());
112 /* this can complete - it was not really secure */
115 OPENSSL_secure_free(p);
117 OPENSSL_secure_free(r);
118 OPENSSL_secure_free(s);
122 return TEST_false(CRYPTO_secure_malloc_init(4096, 32));
126 void register_tests(void)
128 ADD_TEST(test_sec_mem);