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());
71 TEST_info("Possible infinite loop: small arena");
72 if (!TEST_false(CRYPTO_secure_malloc_init(16, 16)))
74 TEST_false(CRYPTO_secure_malloc_initialized());
75 TEST_ptr_null(OPENSSL_secure_malloc((size_t)-1));
76 TEST_true(CRYPTO_secure_malloc_done());
79 * There was also a possible infinite loop when the number of
80 * elements was 1<<31, as |int i| was set to that, which is a
81 * negative number. However, it requires minimum input values:
83 * CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4);
85 * Which really only works on 64-bit systems, and even then the
86 * code attempts to allocate 16 GB secure memory arena. Linux
87 * can deal with this better than other Unixy OS's (e.g. MacOS)
88 * but we don't want to push the system too hard during a unit
89 * test. In addition, trying to allocate 16GB will cause the
90 * mlock() call to fail, so that was at least changed to no
91 * longer be an assert. If the reader of this comment really
92 * wants to make sure that infinite loop is fixed, they can
93 * enable the code below.
96 /* This test should only be run under Linux... runner beware */
97 if (sizeof(size_t) > 4) {
98 TEST_info("Possible infinite loop: 1<<31 limit");
99 if (TEST_true(CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4) != 0))
100 TEST_true(CRYPTO_secure_malloc_done());
104 /* this can complete - it was not really secure */
107 OPENSSL_secure_free(p);
109 OPENSSL_secure_free(r);
110 OPENSSL_secure_free(s);
114 return TEST_false(CRYPTO_secure_malloc_init(4096, 32));
118 void register_tests(void)
120 ADD_TEST(test_sec_mem);