2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
11 #include <openssl/evp.h>
12 #include <openssl/params.h>
13 #include <openssl/crypto.h>
14 #include "internal/cryptlib.h"
15 #include <openssl/fipskey.h>
16 #include <openssl/err.h>
17 #include <openssl/proverr.h>
19 #include "prov/providercommon.h"
22 * We're cheating here. Normally we don't allow RUN_ONCE usage inside the FIPS
23 * module because all such initialisation should be associated with an
24 * individual OSSL_LIB_CTX. That doesn't work with the self test though because
25 * it should be run once regardless of the number of OSSL_LIB_CTXs we have.
27 #define ALLOW_RUN_ONCE_IN_FIPS
28 #include "internal/thread_once.h"
29 #include "self_test.h"
31 #define FIPS_STATE_INIT 0
32 #define FIPS_STATE_SELFTEST 1
33 #define FIPS_STATE_RUNNING 2
34 #define FIPS_STATE_ERROR 3
37 * The number of times the module will report it is in the error state
40 #define FIPS_ERROR_REPORTING_RATE_LIMIT 10
42 /* The size of a temp buffer used to read in data */
43 #define INTEGRITY_BUF_SIZE (4096)
44 #define MAX_MD_SIZE 64
45 #define MAC_NAME "HMAC"
46 #define DIGEST_NAME "SHA256"
48 static int FIPS_conditional_error_check = 1;
49 static CRYPTO_RWLOCK *self_test_lock = NULL;
50 static CRYPTO_RWLOCK *fips_state_lock = NULL;
51 static unsigned char fixed_key[32] = { FIPS_KEY_ELEMENTS };
53 static CRYPTO_ONCE fips_self_test_init = CRYPTO_ONCE_STATIC_INIT;
54 DEFINE_RUN_ONCE_STATIC(do_fips_self_test_init)
57 * These locks get freed in platform specific ways that may occur after we
58 * do mem leak checking. If we don't know how to free it for a particular
59 * platform then we just leak it deliberately.
61 self_test_lock = CRYPTO_THREAD_lock_new();
62 fips_state_lock = CRYPTO_THREAD_lock_new();
63 return self_test_lock != NULL;
67 * Declarations for the DEP entry/exit points.
68 * Ones not required or incorrect need to be undefined or redefined respectively.
70 #define DEP_INITIAL_STATE FIPS_STATE_INIT
71 #define DEP_INIT_ATTRIBUTE static
72 #define DEP_FINI_ATTRIBUTE static
74 #if !defined(__GNUC__)
75 static void init(void);
76 static void cleanup(void);
80 * This is the Default Entry Point (DEP) code.
81 * See FIPS 140-2 IG 9.10
83 #if defined(_WIN32) || defined(__CYGWIN__)
85 /* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
88 * this has side-effect of _WIN32 getting defined, which otherwise is
89 * mutually exclusive with __CYGWIN__...
93 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
94 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
97 case DLL_PROCESS_ATTACH:
100 case DLL_PROCESS_DETACH:
110 # pragma fini(cleanup)
116 # pragma fini(_cleanup)
126 #elif defined(__hpux)
128 # pragma fini "cleanup"
130 #elif defined(__GNUC__)
131 # undef DEP_INIT_ATTRIBUTE
132 # undef DEP_FINI_ATTRIBUTE
133 # define DEP_INIT_ATTRIBUTE static __attribute__((constructor))
134 # define DEP_FINI_ATTRIBUTE static __attribute__((destructor))
136 #elif defined(__TANDEM)
137 /* Method automatically called by the NonStop OS when the DLL loads */
138 void __INIT__init(void) {
142 /* Method automatically called by the NonStop OS prior to unloading the DLL */
143 void __TERM__cleanup(void) {
149 * This build does not support any kind of DEP.
150 * We force the self-tests to run as part of the FIPS provider initialisation
151 * rather than being triggered by the DEP.
153 # undef DEP_INIT_ATTRIBUTE
154 # undef DEP_FINI_ATTRIBUTE
155 # undef DEP_INITIAL_STATE
156 # define DEP_INITIAL_STATE FIPS_STATE_SELFTEST
159 static int FIPS_state = DEP_INITIAL_STATE;
161 #if defined(DEP_INIT_ATTRIBUTE)
162 DEP_INIT_ATTRIBUTE void init(void)
164 FIPS_state = FIPS_STATE_SELFTEST;
168 #if defined(DEP_FINI_ATTRIBUTE)
169 DEP_FINI_ATTRIBUTE void cleanup(void)
171 CRYPTO_THREAD_lock_free(self_test_lock);
172 CRYPTO_THREAD_lock_free(fips_state_lock);
177 * Calculate the HMAC SHA256 of data read using a BIO and read_cb, and verify
178 * the result matches the expected value.
179 * Return 1 if verified, or 0 if it fails.
181 static int verify_integrity(OSSL_CORE_BIO *bio, OSSL_FUNC_BIO_read_ex_fn read_ex_cb,
182 unsigned char *expected, size_t expected_len,
183 OSSL_LIB_CTX *libctx, OSSL_SELF_TEST *ev,
184 const char *event_type)
187 unsigned char out[MAX_MD_SIZE];
188 unsigned char buf[INTEGRITY_BUF_SIZE];
189 size_t bytes_read = 0, out_len = 0;
191 EVP_MAC_CTX *ctx = NULL;
192 OSSL_PARAM params[2], *p = params;
194 OSSL_SELF_TEST_onbegin(ev, event_type, OSSL_SELF_TEST_DESC_INTEGRITY_HMAC);
196 mac = EVP_MAC_fetch(libctx, MAC_NAME, NULL);
199 ctx = EVP_MAC_CTX_new(mac);
203 *p++ = OSSL_PARAM_construct_utf8_string("digest", DIGEST_NAME, 0);
204 *p = OSSL_PARAM_construct_end();
206 if (!EVP_MAC_init(ctx, fixed_key, sizeof(fixed_key), params))
210 status = read_ex_cb(bio, buf, sizeof(buf), &bytes_read);
213 if (!EVP_MAC_update(ctx, buf, bytes_read))
216 if (!EVP_MAC_final(ctx, out, &out_len, sizeof(out)))
219 OSSL_SELF_TEST_oncorrupt_byte(ev, out);
220 if (expected_len != out_len
221 || memcmp(expected, out, out_len) != 0)
225 OSSL_SELF_TEST_onend(ev, ret);
226 EVP_MAC_CTX_free(ctx);
231 static void set_fips_state(int state)
233 if (ossl_assert(CRYPTO_THREAD_write_lock(fips_state_lock) != 0)) {
235 CRYPTO_THREAD_unlock(fips_state_lock);
239 /* This API is triggered either on loading of the FIPS module or on demand */
240 int SELF_TEST_post(SELF_TEST_POST_PARAMS *st, int on_demand_test)
243 int kats_already_passed = 0;
245 OSSL_CORE_BIO *bio_module = NULL, *bio_indicator = NULL;
246 unsigned char *module_checksum = NULL;
247 unsigned char *indicator_checksum = NULL;
249 OSSL_SELF_TEST *ev = NULL;
251 if (!RUN_ONCE(&fips_self_test_init, do_fips_self_test_init))
254 if (!CRYPTO_THREAD_read_lock(fips_state_lock))
256 loclstate = FIPS_state;
257 CRYPTO_THREAD_unlock(fips_state_lock);
259 if (loclstate == FIPS_STATE_RUNNING) {
262 } else if (loclstate != FIPS_STATE_SELFTEST) {
263 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_STATE);
267 if (!CRYPTO_THREAD_write_lock(self_test_lock))
269 if (!CRYPTO_THREAD_read_lock(fips_state_lock)) {
270 CRYPTO_THREAD_unlock(self_test_lock);
273 if (FIPS_state == FIPS_STATE_RUNNING) {
274 CRYPTO_THREAD_unlock(fips_state_lock);
275 if (!on_demand_test) {
276 CRYPTO_THREAD_unlock(self_test_lock);
279 set_fips_state(FIPS_STATE_SELFTEST);
280 } else if (FIPS_state != FIPS_STATE_SELFTEST) {
281 CRYPTO_THREAD_unlock(fips_state_lock);
282 CRYPTO_THREAD_unlock(self_test_lock);
283 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_STATE);
286 CRYPTO_THREAD_unlock(fips_state_lock);
290 || st->module_checksum_data == NULL) {
291 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_CONFIG_DATA);
295 ev = OSSL_SELF_TEST_new(st->cb, st->cb_arg);
299 module_checksum = OPENSSL_hexstr2buf(st->module_checksum_data,
301 if (module_checksum == NULL) {
302 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CONFIG_DATA);
305 bio_module = (*st->bio_new_file_cb)(st->module_filename, "rb");
307 /* Always check the integrity of the fips module */
308 if (bio_module == NULL
309 || !verify_integrity(bio_module, st->bio_read_ex_cb,
310 module_checksum, checksum_len, st->libctx,
311 ev, OSSL_SELF_TEST_TYPE_MODULE_INTEGRITY)) {
312 ERR_raise(ERR_LIB_PROV, PROV_R_MODULE_INTEGRITY_FAILURE);
316 /* This will be NULL during installation - so the self test KATS will run */
317 if (st->indicator_data != NULL) {
319 * If the kats have already passed indicator is set - then check the
320 * integrity of the indicator.
322 if (st->indicator_checksum_data == NULL) {
323 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_CONFIG_DATA);
326 indicator_checksum = OPENSSL_hexstr2buf(st->indicator_checksum_data,
328 if (indicator_checksum == NULL) {
329 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CONFIG_DATA);
334 (*st->bio_new_buffer_cb)(st->indicator_data,
335 strlen(st->indicator_data));
336 if (bio_indicator == NULL
337 || !verify_integrity(bio_indicator, st->bio_read_ex_cb,
338 indicator_checksum, checksum_len,
340 OSSL_SELF_TEST_TYPE_INSTALL_INTEGRITY)) {
341 ERR_raise(ERR_LIB_PROV, PROV_R_INDICATOR_INTEGRITY_FAILURE);
344 kats_already_passed = 1;
349 * Only runs the KAT's during installation OR on_demand().
350 * NOTE: If the installation option 'self_test_onload' is chosen then this
351 * path will always be run, since kats_already_passed will always be 0.
353 if (on_demand_test || kats_already_passed == 0) {
354 if (!SELF_TEST_kats(ev, st->libctx)) {
355 ERR_raise(ERR_LIB_PROV, PROV_R_SELF_TEST_KAT_FAILURE);
361 OSSL_SELF_TEST_free(ev);
362 OPENSSL_free(module_checksum);
363 OPENSSL_free(indicator_checksum);
366 (*st->bio_free_cb)(bio_indicator);
367 (*st->bio_free_cb)(bio_module);
370 set_fips_state(FIPS_STATE_RUNNING);
372 ossl_set_error_state(OSSL_SELF_TEST_TYPE_NONE);
373 CRYPTO_THREAD_unlock(self_test_lock);
378 void SELF_TEST_disable_conditional_error_state(void)
380 FIPS_conditional_error_check = 0;
383 void ossl_set_error_state(const char *type)
385 int cond_test = (type != NULL && strcmp(type, OSSL_SELF_TEST_TYPE_PCT) == 0);
387 if (!cond_test || (FIPS_conditional_error_check == 1)) {
388 set_fips_state(FIPS_STATE_ERROR);
389 ERR_raise(ERR_LIB_PROV, PROV_R_FIPS_MODULE_ENTERING_ERROR_STATE);
391 ERR_raise(ERR_LIB_PROV, PROV_R_FIPS_MODULE_CONDITIONAL_ERROR);
395 int ossl_prov_is_running(void)
398 static unsigned int rate_limit = 0;
400 if (!CRYPTO_THREAD_read_lock(fips_state_lock))
402 res = FIPS_state == FIPS_STATE_RUNNING
403 || FIPS_state == FIPS_STATE_SELFTEST;
404 if (FIPS_state == FIPS_STATE_ERROR) {
405 CRYPTO_THREAD_unlock(fips_state_lock);
406 if (!CRYPTO_THREAD_write_lock(fips_state_lock))
408 if (rate_limit++ < FIPS_ERROR_REPORTING_RATE_LIMIT)
409 ERR_raise(ERR_LIB_PROV, PROV_R_FIPS_MODULE_IN_ERROR_STATE);
411 CRYPTO_THREAD_unlock(fips_state_lock);