1 /* Copyright (c) 2017, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15 #include <openssl/crypto.h>
16
17 #include "../../internal.h"
18 #include "../delocate.h"
19
20
FIPS_mode(void)21 int FIPS_mode(void) {
22 #if defined(BORINGSSL_FIPS) && !defined(OPENSSL_ASAN)
23 return 1;
24 #else
25 return 0;
26 #endif
27 }
28
FIPS_mode_set(int on)29 int FIPS_mode_set(int on) { return on == FIPS_mode(); }
30
31 #if defined(BORINGSSL_FIPS_COUNTERS)
32
FIPS_read_counter(enum fips_counter_t counter)33 size_t FIPS_read_counter(enum fips_counter_t counter) {
34 if (counter < 0 || counter > fips_counter_max) {
35 abort();
36 }
37
38 const size_t *array =
39 CRYPTO_get_thread_local(OPENSSL_THREAD_LOCAL_FIPS_COUNTERS);
40 if (!array) {
41 return 0;
42 }
43
44 return array[counter];
45 }
46
boringssl_fips_inc_counter(enum fips_counter_t counter)47 void boringssl_fips_inc_counter(enum fips_counter_t counter) {
48 if (counter < 0 || counter > fips_counter_max) {
49 abort();
50 }
51
52 size_t *array =
53 CRYPTO_get_thread_local(OPENSSL_THREAD_LOCAL_FIPS_COUNTERS);
54 if (!array) {
55 const size_t num_bytes = sizeof(size_t) * (fips_counter_max + 1);
56 array = OPENSSL_malloc(num_bytes);
57 if (!array) {
58 return;
59 }
60
61 OPENSSL_memset(array, 0, num_bytes);
62 if (!CRYPTO_set_thread_local(OPENSSL_THREAD_LOCAL_FIPS_COUNTERS, array,
63 OPENSSL_free)) {
64 // |OPENSSL_free| has already been called by |CRYPTO_set_thread_local|.
65 return;
66 }
67 }
68
69 array[counter]++;
70 }
71
72 #else
73
FIPS_read_counter(enum fips_counter_t counter)74 size_t FIPS_read_counter(enum fips_counter_t counter) { return 0; }
75
76 // boringssl_fips_inc_counter is a no-op, inline function in internal.h in this
77 // case. That should let the compiler optimise away the callsites.
78
79 #endif
80