1 | /* random.c
|
---|
2 | *
|
---|
3 | * Copyright (C) 2006-2017 wolfSSL Inc.
|
---|
4 | *
|
---|
5 | * This file is part of wolfSSL.
|
---|
6 | *
|
---|
7 | * wolfSSL is free software; you can redistribute it and/or modify
|
---|
8 | * it under the terms of the GNU General Public License as published by
|
---|
9 | * the Free Software Foundation; either version 2 of the License, or
|
---|
10 | * (at your option) any later version.
|
---|
11 | *
|
---|
12 | * wolfSSL is distributed in the hope that it will be useful,
|
---|
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
15 | * GNU General Public License for more details.
|
---|
16 | *
|
---|
17 | * You should have received a copy of the GNU General Public License
|
---|
18 | * along with this program; if not, write to the Free Software
|
---|
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
|
---|
20 | */
|
---|
21 |
|
---|
22 |
|
---|
23 | #ifdef HAVE_CONFIG_H
|
---|
24 | #include <config.h>
|
---|
25 | #endif
|
---|
26 |
|
---|
27 | #include <wolfssl/wolfcrypt/settings.h>
|
---|
28 | #include <wolfssl/wolfcrypt/error-crypt.h>
|
---|
29 |
|
---|
30 | /* on HPUX 11 you may need to install /dev/random see
|
---|
31 | http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I
|
---|
32 |
|
---|
33 | */
|
---|
34 |
|
---|
35 | #if defined(HAVE_FIPS) && \
|
---|
36 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
|
---|
37 |
|
---|
38 | /* set NO_WRAPPERS before headers, use direct internal f()s not wrappers */
|
---|
39 | #define FIPS_NO_WRAPPERS
|
---|
40 |
|
---|
41 | #ifdef USE_WINDOWS_API
|
---|
42 | #pragma code_seg(".fipsA$c")
|
---|
43 | #pragma const_seg(".fipsB$c")
|
---|
44 | #endif
|
---|
45 | #endif
|
---|
46 |
|
---|
47 |
|
---|
48 | #include <wolfssl/wolfcrypt/random.h>
|
---|
49 | #include <wolfssl/wolfcrypt/cpuid.h>
|
---|
50 |
|
---|
51 |
|
---|
52 | /* If building for old FIPS. */
|
---|
53 | #if defined(HAVE_FIPS) && \
|
---|
54 | (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
|
---|
55 |
|
---|
56 | int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz)
|
---|
57 | {
|
---|
58 | return GenerateSeed(os, seed, sz);
|
---|
59 | }
|
---|
60 |
|
---|
61 | int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId)
|
---|
62 | {
|
---|
63 | (void)heap;
|
---|
64 | (void)devId;
|
---|
65 | return InitRng_fips(rng);
|
---|
66 | }
|
---|
67 |
|
---|
68 | int wc_InitRng(WC_RNG* rng)
|
---|
69 | {
|
---|
70 | return InitRng_fips(rng);
|
---|
71 | }
|
---|
72 |
|
---|
73 |
|
---|
74 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* b, word32 sz)
|
---|
75 | {
|
---|
76 | return RNG_GenerateBlock_fips(rng, b, sz);
|
---|
77 | }
|
---|
78 |
|
---|
79 |
|
---|
80 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
81 | {
|
---|
82 | return RNG_GenerateByte(rng, b);
|
---|
83 | }
|
---|
84 |
|
---|
85 | #ifdef HAVE_HASHDRBG
|
---|
86 |
|
---|
87 | int wc_FreeRng(WC_RNG* rng)
|
---|
88 | {
|
---|
89 | return FreeRng_fips(rng);
|
---|
90 | }
|
---|
91 |
|
---|
92 | int wc_RNG_HealthTest(int reseed, const byte* seedA, word32 seedASz,
|
---|
93 | const byte* seedB, word32 seedBSz,
|
---|
94 | byte* output, word32 outputSz)
|
---|
95 | {
|
---|
96 | return RNG_HealthTest_fips(reseed, seedA, seedASz,
|
---|
97 | seedB, seedBSz, output, outputSz);
|
---|
98 | }
|
---|
99 | #endif /* HAVE_HASHDRBG */
|
---|
100 |
|
---|
101 | #else /* else build without fips, or for new fips */
|
---|
102 |
|
---|
103 | #ifndef WC_NO_RNG /* if not FIPS and RNG is disabled then do not compile */
|
---|
104 |
|
---|
105 | #include <wolfssl/wolfcrypt/sha256.h>
|
---|
106 |
|
---|
107 | #ifdef NO_INLINE
|
---|
108 | #include <wolfssl/wolfcrypt/misc.h>
|
---|
109 | #else
|
---|
110 | #define WOLFSSL_MISC_INCLUDED
|
---|
111 | #include <wolfcrypt/src/misc.c>
|
---|
112 | #endif
|
---|
113 |
|
---|
114 | #if defined(WOLFSSL_SGX)
|
---|
115 | #include <sgx_trts.h>
|
---|
116 | #elif defined(USE_WINDOWS_API)
|
---|
117 | #ifndef _WIN32_WINNT
|
---|
118 | #define _WIN32_WINNT 0x0400
|
---|
119 | #endif
|
---|
120 | #include <windows.h>
|
---|
121 | #include <wincrypt.h>
|
---|
122 | #elif defined(HAVE_WNR)
|
---|
123 | #include <wnr.h>
|
---|
124 | #include <wolfssl/wolfcrypt/logging.h>
|
---|
125 | wolfSSL_Mutex wnr_mutex; /* global netRandom mutex */
|
---|
126 | int wnr_timeout = 0; /* entropy timeout, mililseconds */
|
---|
127 | int wnr_mutex_init = 0; /* flag for mutex init */
|
---|
128 | wnr_context* wnr_ctx; /* global netRandom context */
|
---|
129 | #elif defined(FREESCALE_KSDK_2_0_TRNG)
|
---|
130 | #include "fsl_trng.h"
|
---|
131 | #elif defined(FREESCALE_KSDK_2_0_RNGA)
|
---|
132 | #include "fsl_rnga.h"
|
---|
133 |
|
---|
134 | #elif defined(NO_DEV_RANDOM)
|
---|
135 | #elif defined(CUSTOM_RAND_GENERATE)
|
---|
136 | #elif defined(CUSTOM_RAND_GENERATE_BLOCK)
|
---|
137 | #elif defined(CUSTOM_RAND_GENERATE_SEED)
|
---|
138 | #elif defined(WOLFSSL_GENSEED_FORTEST)
|
---|
139 | #elif defined(WOLFSSL_MDK_ARM)
|
---|
140 | #elif defined(WOLFSSL_IAR_ARM)
|
---|
141 | #elif defined(WOLFSSL_ROWLEY_ARM)
|
---|
142 | #elif defined(WOLFSSL_EMBOS)
|
---|
143 | #elif defined(MICRIUM)
|
---|
144 | #elif defined(WOLFSSL_NUCLEUS)
|
---|
145 | #elif defined(WOLFSSL_PB)
|
---|
146 | #else
|
---|
147 | /* include headers that may be needed to get good seed */
|
---|
148 | #include <fcntl.h>
|
---|
149 | #ifndef EBSNET
|
---|
150 | #include <unistd.h>
|
---|
151 | #endif
|
---|
152 | #endif
|
---|
153 |
|
---|
154 |
|
---|
155 | #if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED)
|
---|
156 | static word32 intel_flags = 0;
|
---|
157 | static void wc_InitRng_IntelRD(void)
|
---|
158 | {
|
---|
159 | intel_flags = cpuid_get_flags();
|
---|
160 | }
|
---|
161 | #ifdef HAVE_INTEL_RDSEED
|
---|
162 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz);
|
---|
163 | #endif
|
---|
164 | #ifdef HAVE_INTEL_RDRAND
|
---|
165 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz);
|
---|
166 | #endif
|
---|
167 |
|
---|
168 | #ifdef USE_WINDOWS_API
|
---|
169 | #include <immintrin.h>
|
---|
170 | #endif /* USE_WINDOWS_API */
|
---|
171 | #endif
|
---|
172 |
|
---|
173 | /* Start NIST DRBG code */
|
---|
174 | #ifdef HAVE_HASHDRBG
|
---|
175 |
|
---|
176 | #define OUTPUT_BLOCK_LEN (WC_SHA256_DIGEST_SIZE)
|
---|
177 | #define MAX_REQUEST_LEN (0x10000)
|
---|
178 | #define RESEED_INTERVAL WC_RESEED_INTERVAL
|
---|
179 |
|
---|
180 |
|
---|
181 | /* For FIPS builds, the user should not be adjusting the values. */
|
---|
182 | #if defined(HAVE_FIPS) && \
|
---|
183 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
|
---|
184 | #if defined(RNG_SECURITY_STRENGTH) \
|
---|
185 | || defined(ENTROPY_SCALE_FACTOR) \
|
---|
186 | || defined(SEED_BLOCK_SZ)
|
---|
187 |
|
---|
188 | #error "Do not change the RNG parameters for FIPS builds."
|
---|
189 | #endif
|
---|
190 | #endif
|
---|
191 |
|
---|
192 |
|
---|
193 | /* The security strength for the RNG is the target number of bits of
|
---|
194 | * entropy you are looking for in a seed. */
|
---|
195 | #ifndef RNG_SECURITY_STRENGTH
|
---|
196 | #if defined(HAVE_FIPS) && \
|
---|
197 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
|
---|
198 | /* SHA-256 requires a minimum of 256-bits of entropy. The goal
|
---|
199 | * of 1024 will provide 4 times that. */
|
---|
200 | #define RNG_SECURITY_STRENGTH (1024)
|
---|
201 | #else
|
---|
202 | /* If not using FIPS or using old FIPS, set the number down a bit.
|
---|
203 | * More is better, but more is also slower. */
|
---|
204 | #define RNG_SECURITY_STRENGTH (256)
|
---|
205 | #endif
|
---|
206 | #endif
|
---|
207 |
|
---|
208 | #ifndef ENTROPY_SCALE_FACTOR
|
---|
209 | /* The entropy scale factor should be the whole number inverse of the
|
---|
210 | * minimum bits of entropy per bit of NDRNG output. */
|
---|
211 | #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
|
---|
212 | /* The value of 2 applies to Intel's RDSEED which provides about
|
---|
213 | * 0.5 bits minimum of entropy per bit. */
|
---|
214 | #define ENTROPY_SCALE_FACTOR 2
|
---|
215 | #else
|
---|
216 | /* Setting the default to 1. */
|
---|
217 | #define ENTROPY_SCALE_FACTOR 1
|
---|
218 | #endif
|
---|
219 | #endif
|
---|
220 |
|
---|
221 | #ifndef SEED_BLOCK_SZ
|
---|
222 | /* The seed block size, is the size of the output of the underlying NDRNG.
|
---|
223 | * This value is used for testing the output of the NDRNG. */
|
---|
224 | #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
|
---|
225 | /* RDSEED outputs in blocks of 64-bits. */
|
---|
226 | #define SEED_BLOCK_SZ sizeof(word64)
|
---|
227 | #else
|
---|
228 | /* Setting the default to 4. */
|
---|
229 | #define SEED_BLOCK_SZ 4
|
---|
230 | #endif
|
---|
231 | #endif
|
---|
232 |
|
---|
233 | #define SEED_SZ (RNG_SECURITY_STRENGTH*ENTROPY_SCALE_FACTOR/8)
|
---|
234 |
|
---|
235 | /* The maximum seed size will be the seed size plus a seed block for the
|
---|
236 | * test, and an additional half of the seed size. This additional half
|
---|
237 | * is in case the user does not supply a nonce. A nonce will be obtained
|
---|
238 | * from the NDRNG. */
|
---|
239 | #define MAX_SEED_SZ (SEED_SZ + SEED_SZ/2 + SEED_BLOCK_SZ)
|
---|
240 |
|
---|
241 |
|
---|
242 | /* Internal return codes */
|
---|
243 | #define DRBG_SUCCESS 0
|
---|
244 | #define DRBG_FAILURE 1
|
---|
245 | #define DRBG_NEED_RESEED 2
|
---|
246 | #define DRBG_CONT_FAILURE 3
|
---|
247 |
|
---|
248 | /* RNG health states */
|
---|
249 | #define DRBG_NOT_INIT 0
|
---|
250 | #define DRBG_OK 1
|
---|
251 | #define DRBG_FAILED 2
|
---|
252 | #define DRBG_CONT_FAILED 3
|
---|
253 |
|
---|
254 | #define RNG_HEALTH_TEST_CHECK_SIZE (WC_SHA256_DIGEST_SIZE * 4)
|
---|
255 |
|
---|
256 | /* Verify max gen block len */
|
---|
257 | #if RNG_MAX_BLOCK_LEN > MAX_REQUEST_LEN
|
---|
258 | #error RNG_MAX_BLOCK_LEN is larger than NIST DBRG max request length
|
---|
259 | #endif
|
---|
260 |
|
---|
261 | enum {
|
---|
262 | drbgInitC = 0,
|
---|
263 | drbgReseed = 1,
|
---|
264 | drbgGenerateW = 2,
|
---|
265 | drbgGenerateH = 3,
|
---|
266 | drbgInitV
|
---|
267 | };
|
---|
268 |
|
---|
269 |
|
---|
270 | typedef struct DRBG {
|
---|
271 | word32 reseedCtr;
|
---|
272 | word32 lastBlock;
|
---|
273 | byte V[DRBG_SEED_LEN];
|
---|
274 | byte C[DRBG_SEED_LEN];
|
---|
275 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
276 | void* heap;
|
---|
277 | int devId;
|
---|
278 | #endif
|
---|
279 | byte matchCount;
|
---|
280 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
281 | wc_Sha256 sha256;
|
---|
282 | #endif
|
---|
283 | } DRBG;
|
---|
284 |
|
---|
285 |
|
---|
286 | static int wc_RNG_HealthTestLocal(int reseed);
|
---|
287 |
|
---|
288 | /* Hash Derivation Function */
|
---|
289 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
290 | static int Hash_df(DRBG* drbg, byte* out, word32 outSz, byte type,
|
---|
291 | const byte* inA, word32 inASz,
|
---|
292 | const byte* inB, word32 inBSz)
|
---|
293 | {
|
---|
294 | int ret = DRBG_FAILURE;
|
---|
295 | byte ctr;
|
---|
296 | int i;
|
---|
297 | int len;
|
---|
298 | word32 bits = (outSz * 8); /* reverse byte order */
|
---|
299 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
300 | wc_Sha256* sha = &drbg->sha256;
|
---|
301 | #else
|
---|
302 | wc_Sha256 sha[1];
|
---|
303 | #endif
|
---|
304 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
305 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
306 | #else
|
---|
307 | byte digest[WC_SHA256_DIGEST_SIZE];
|
---|
308 | #endif
|
---|
309 |
|
---|
310 | (void)drbg;
|
---|
311 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
312 | if (digest == NULL)
|
---|
313 | return DRBG_FAILURE;
|
---|
314 | #endif
|
---|
315 |
|
---|
316 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
317 | bits = ByteReverseWord32(bits);
|
---|
318 | #endif
|
---|
319 | len = (outSz / OUTPUT_BLOCK_LEN)
|
---|
320 | + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
|
---|
321 |
|
---|
322 | for (i = 0, ctr = 1; i < len; i++, ctr++) {
|
---|
323 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
324 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
325 | ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId);
|
---|
326 | #else
|
---|
327 | ret = wc_InitSha256(sha);
|
---|
328 | #endif
|
---|
329 | if (ret != 0)
|
---|
330 | break;
|
---|
331 |
|
---|
332 | if (ret == 0)
|
---|
333 | #endif
|
---|
334 | ret = wc_Sha256Update(sha, &ctr, sizeof(ctr));
|
---|
335 | if (ret == 0)
|
---|
336 | ret = wc_Sha256Update(sha, (byte*)&bits, sizeof(bits));
|
---|
337 |
|
---|
338 | if (ret == 0) {
|
---|
339 | /* churning V is the only string that doesn't have the type added */
|
---|
340 | if (type != drbgInitV)
|
---|
341 | ret = wc_Sha256Update(sha, &type, sizeof(type));
|
---|
342 | }
|
---|
343 | if (ret == 0)
|
---|
344 | ret = wc_Sha256Update(sha, inA, inASz);
|
---|
345 | if (ret == 0) {
|
---|
346 | if (inB != NULL && inBSz > 0)
|
---|
347 | ret = wc_Sha256Update(sha, inB, inBSz);
|
---|
348 | }
|
---|
349 | if (ret == 0)
|
---|
350 | ret = wc_Sha256Final(sha, digest);
|
---|
351 |
|
---|
352 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
353 | wc_Sha256Free(sha);
|
---|
354 | #endif
|
---|
355 | if (ret == 0) {
|
---|
356 | if (outSz > OUTPUT_BLOCK_LEN) {
|
---|
357 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
|
---|
358 | outSz -= OUTPUT_BLOCK_LEN;
|
---|
359 | out += OUTPUT_BLOCK_LEN;
|
---|
360 | }
|
---|
361 | else {
|
---|
362 | XMEMCPY(out, digest, outSz);
|
---|
363 | }
|
---|
364 | }
|
---|
365 | }
|
---|
366 |
|
---|
367 | ForceZero(digest, WC_SHA256_DIGEST_SIZE);
|
---|
368 |
|
---|
369 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
370 | FREE_VAR(digest, drbg->heap);
|
---|
371 | #endif
|
---|
372 |
|
---|
373 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
374 | }
|
---|
375 |
|
---|
376 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
377 | static int Hash_DRBG_Reseed(DRBG* drbg, const byte* seed, word32 seedSz)
|
---|
378 | {
|
---|
379 | byte newV[DRBG_SEED_LEN];
|
---|
380 |
|
---|
381 | XMEMSET(newV, 0, DRBG_SEED_LEN);
|
---|
382 |
|
---|
383 | if (Hash_df(drbg, newV, sizeof(newV), drbgReseed,
|
---|
384 | drbg->V, sizeof(drbg->V), seed, seedSz) != DRBG_SUCCESS) {
|
---|
385 | return DRBG_FAILURE;
|
---|
386 | }
|
---|
387 |
|
---|
388 | XMEMCPY(drbg->V, newV, sizeof(drbg->V));
|
---|
389 | ForceZero(newV, sizeof(newV));
|
---|
390 |
|
---|
391 | if (Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
392 | sizeof(drbg->V), NULL, 0) != DRBG_SUCCESS) {
|
---|
393 | return DRBG_FAILURE;
|
---|
394 | }
|
---|
395 |
|
---|
396 | drbg->reseedCtr = 1;
|
---|
397 | drbg->lastBlock = 0;
|
---|
398 | drbg->matchCount = 0;
|
---|
399 | return DRBG_SUCCESS;
|
---|
400 | }
|
---|
401 |
|
---|
402 | /* Returns: DRBG_SUCCESS and DRBG_FAILURE or BAD_FUNC_ARG on fail */
|
---|
403 | int wc_RNG_DRBG_Reseed(WC_RNG* rng, const byte* seed, word32 seedSz)
|
---|
404 | {
|
---|
405 | if (rng == NULL || seed == NULL) {
|
---|
406 | return BAD_FUNC_ARG;
|
---|
407 | }
|
---|
408 |
|
---|
409 | return Hash_DRBG_Reseed(rng->drbg, seed, seedSz);
|
---|
410 | }
|
---|
411 |
|
---|
412 | static WC_INLINE void array_add_one(byte* data, word32 dataSz)
|
---|
413 | {
|
---|
414 | int i;
|
---|
415 |
|
---|
416 | for (i = dataSz - 1; i >= 0; i--)
|
---|
417 | {
|
---|
418 | data[i]++;
|
---|
419 | if (data[i] != 0) break;
|
---|
420 | }
|
---|
421 | }
|
---|
422 |
|
---|
423 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
424 | static int Hash_gen(DRBG* drbg, byte* out, word32 outSz, const byte* V)
|
---|
425 | {
|
---|
426 | int ret = DRBG_FAILURE;
|
---|
427 | byte data[DRBG_SEED_LEN];
|
---|
428 | int i;
|
---|
429 | int len;
|
---|
430 | word32 checkBlock;
|
---|
431 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
432 | wc_Sha256* sha = &drbg->sha256;
|
---|
433 | #else
|
---|
434 | wc_Sha256 sha[1];
|
---|
435 | #endif
|
---|
436 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
437 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
438 | #else
|
---|
439 | byte digest[WC_SHA256_DIGEST_SIZE];
|
---|
440 | #endif
|
---|
441 |
|
---|
442 | /* Special case: outSz is 0 and out is NULL. wc_Generate a block to save for
|
---|
443 | * the continuous test. */
|
---|
444 |
|
---|
445 | if (outSz == 0) outSz = 1;
|
---|
446 |
|
---|
447 | len = (outSz / OUTPUT_BLOCK_LEN) + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
|
---|
448 |
|
---|
449 | XMEMCPY(data, V, sizeof(data));
|
---|
450 | for (i = 0; i < len; i++) {
|
---|
451 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
452 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
453 | ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId);
|
---|
454 | #else
|
---|
455 | ret = wc_InitSha256(sha);
|
---|
456 | #endif
|
---|
457 | if (ret == 0)
|
---|
458 | #endif
|
---|
459 | ret = wc_Sha256Update(sha, data, sizeof(data));
|
---|
460 | if (ret == 0)
|
---|
461 | ret = wc_Sha256Final(sha, digest);
|
---|
462 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
463 | wc_Sha256Free(sha);
|
---|
464 | #endif
|
---|
465 |
|
---|
466 | if (ret == 0) {
|
---|
467 | XMEMCPY(&checkBlock, digest, sizeof(word32));
|
---|
468 | if (drbg->reseedCtr > 1 && checkBlock == drbg->lastBlock) {
|
---|
469 | if (drbg->matchCount == 1) {
|
---|
470 | return DRBG_CONT_FAILURE;
|
---|
471 | }
|
---|
472 | else {
|
---|
473 | if (i == len) {
|
---|
474 | len++;
|
---|
475 | }
|
---|
476 | drbg->matchCount = 1;
|
---|
477 | }
|
---|
478 | }
|
---|
479 | else {
|
---|
480 | drbg->matchCount = 0;
|
---|
481 | drbg->lastBlock = checkBlock;
|
---|
482 | }
|
---|
483 |
|
---|
484 | if (out != NULL && outSz != 0) {
|
---|
485 | if (outSz >= OUTPUT_BLOCK_LEN) {
|
---|
486 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
|
---|
487 | outSz -= OUTPUT_BLOCK_LEN;
|
---|
488 | out += OUTPUT_BLOCK_LEN;
|
---|
489 | array_add_one(data, DRBG_SEED_LEN);
|
---|
490 | }
|
---|
491 | else {
|
---|
492 | XMEMCPY(out, digest, outSz);
|
---|
493 | outSz = 0;
|
---|
494 | }
|
---|
495 | }
|
---|
496 | }
|
---|
497 | }
|
---|
498 | ForceZero(data, sizeof(data));
|
---|
499 |
|
---|
500 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
501 | FREE_VAR(digest, drbg->heap);
|
---|
502 | #endif
|
---|
503 |
|
---|
504 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
505 | }
|
---|
506 |
|
---|
507 | static WC_INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen)
|
---|
508 | {
|
---|
509 | word16 carry = 0;
|
---|
510 |
|
---|
511 | if (dLen > 0 && sLen > 0 && dLen >= sLen) {
|
---|
512 | int sIdx, dIdx;
|
---|
513 |
|
---|
514 | for (sIdx = sLen - 1, dIdx = dLen - 1; sIdx >= 0; dIdx--, sIdx--)
|
---|
515 | {
|
---|
516 | carry += d[dIdx] + s[sIdx];
|
---|
517 | d[dIdx] = (byte)carry;
|
---|
518 | carry >>= 8;
|
---|
519 | }
|
---|
520 |
|
---|
521 | for (; carry != 0 && dIdx >= 0; dIdx--) {
|
---|
522 | carry += d[dIdx];
|
---|
523 | d[dIdx] = (byte)carry;
|
---|
524 | carry >>= 8;
|
---|
525 | }
|
---|
526 | }
|
---|
527 | }
|
---|
528 |
|
---|
529 | /* Returns: DRBG_SUCCESS, DRBG_NEED_RESEED, or DRBG_FAILURE */
|
---|
530 | static int Hash_DRBG_Generate(DRBG* drbg, byte* out, word32 outSz)
|
---|
531 | {
|
---|
532 | int ret;
|
---|
533 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
534 | wc_Sha256* sha = &drbg->sha256;
|
---|
535 | #else
|
---|
536 | wc_Sha256 sha[1];
|
---|
537 | #endif
|
---|
538 | byte type;
|
---|
539 | word32 reseedCtr;
|
---|
540 |
|
---|
541 | if (drbg->reseedCtr == RESEED_INTERVAL) {
|
---|
542 | return DRBG_NEED_RESEED;
|
---|
543 | } else {
|
---|
544 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
545 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
546 | #else
|
---|
547 | byte digest[WC_SHA256_DIGEST_SIZE];
|
---|
548 | #endif
|
---|
549 | type = drbgGenerateH;
|
---|
550 | reseedCtr = drbg->reseedCtr;
|
---|
551 |
|
---|
552 | ret = Hash_gen(drbg, out, outSz, drbg->V);
|
---|
553 | if (ret == DRBG_SUCCESS) {
|
---|
554 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
555 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
556 | ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId);
|
---|
557 | #else
|
---|
558 | ret = wc_InitSha256(sha);
|
---|
559 | #endif
|
---|
560 | if (ret == 0)
|
---|
561 | #endif
|
---|
562 | ret = wc_Sha256Update(sha, &type, sizeof(type));
|
---|
563 | if (ret == 0)
|
---|
564 | ret = wc_Sha256Update(sha, drbg->V, sizeof(drbg->V));
|
---|
565 | if (ret == 0)
|
---|
566 | ret = wc_Sha256Final(sha, digest);
|
---|
567 |
|
---|
568 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
569 | wc_Sha256Free(sha);
|
---|
570 | #endif
|
---|
571 |
|
---|
572 | if (ret == 0) {
|
---|
573 | array_add(drbg->V, sizeof(drbg->V), digest, WC_SHA256_DIGEST_SIZE);
|
---|
574 | array_add(drbg->V, sizeof(drbg->V), drbg->C, sizeof(drbg->C));
|
---|
575 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
576 | reseedCtr = ByteReverseWord32(reseedCtr);
|
---|
577 | #endif
|
---|
578 | array_add(drbg->V, sizeof(drbg->V),
|
---|
579 | (byte*)&reseedCtr, sizeof(reseedCtr));
|
---|
580 | ret = DRBG_SUCCESS;
|
---|
581 | }
|
---|
582 | drbg->reseedCtr++;
|
---|
583 | }
|
---|
584 | ForceZero(digest, WC_SHA256_DIGEST_SIZE);
|
---|
585 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
586 | FREE_VAR(digest, drbg->heap);
|
---|
587 | #endif
|
---|
588 | }
|
---|
589 |
|
---|
590 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
591 | }
|
---|
592 |
|
---|
593 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
594 | static int Hash_DRBG_Instantiate(DRBG* drbg, const byte* seed, word32 seedSz,
|
---|
595 | const byte* nonce, word32 nonceSz,
|
---|
596 | void* heap, int devId)
|
---|
597 | {
|
---|
598 | int ret = DRBG_FAILURE;
|
---|
599 |
|
---|
600 | XMEMSET(drbg, 0, sizeof(DRBG));
|
---|
601 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
602 | drbg->heap = heap;
|
---|
603 | drbg->devId = devId;
|
---|
604 | #else
|
---|
605 | (void)heap;
|
---|
606 | (void)devId;
|
---|
607 | #endif
|
---|
608 |
|
---|
609 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
610 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
611 | ret = wc_InitSha256_ex(&drbg->sha256, drbg->heap, drbg->devId);
|
---|
612 | #else
|
---|
613 | ret = wc_InitSha256(&drbg->sha256);
|
---|
614 | #endif
|
---|
615 | if (ret != 0)
|
---|
616 | return ret;
|
---|
617 | #endif
|
---|
618 |
|
---|
619 | if (Hash_df(drbg, drbg->V, sizeof(drbg->V), drbgInitV, seed, seedSz,
|
---|
620 | nonce, nonceSz) == DRBG_SUCCESS &&
|
---|
621 | Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
622 | sizeof(drbg->V), NULL, 0) == DRBG_SUCCESS) {
|
---|
623 |
|
---|
624 | drbg->reseedCtr = 1;
|
---|
625 | drbg->lastBlock = 0;
|
---|
626 | drbg->matchCount = 0;
|
---|
627 | ret = DRBG_SUCCESS;
|
---|
628 | }
|
---|
629 |
|
---|
630 | return ret;
|
---|
631 | }
|
---|
632 |
|
---|
633 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
634 | static int Hash_DRBG_Uninstantiate(DRBG* drbg)
|
---|
635 | {
|
---|
636 | word32 i;
|
---|
637 | int compareSum = 0;
|
---|
638 | byte* compareDrbg = (byte*)drbg;
|
---|
639 |
|
---|
640 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
641 | wc_Sha256Free(&drbg->sha256);
|
---|
642 | #endif
|
---|
643 |
|
---|
644 | ForceZero(drbg, sizeof(DRBG));
|
---|
645 |
|
---|
646 | for (i = 0; i < sizeof(DRBG); i++)
|
---|
647 | compareSum |= compareDrbg[i] ^ 0;
|
---|
648 |
|
---|
649 | return (compareSum == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
650 | }
|
---|
651 |
|
---|
652 |
|
---|
653 | int wc_RNG_TestSeed(const byte* seed, word32 seedSz)
|
---|
654 | {
|
---|
655 | int ret = DRBG_SUCCESS;
|
---|
656 |
|
---|
657 | /* Check the seed for duplicate words. */
|
---|
658 | word32 seedIdx = 0;
|
---|
659 | word32 scratchSz = min(SEED_BLOCK_SZ, seedSz - SEED_BLOCK_SZ);
|
---|
660 |
|
---|
661 | while (seedIdx < seedSz - SEED_BLOCK_SZ) {
|
---|
662 | if (ConstantCompare(seed + seedIdx,
|
---|
663 | seed + seedIdx + scratchSz,
|
---|
664 | scratchSz) == 0) {
|
---|
665 |
|
---|
666 | ret = DRBG_CONT_FAILURE;
|
---|
667 | }
|
---|
668 | seedIdx += SEED_BLOCK_SZ;
|
---|
669 | scratchSz = min(SEED_BLOCK_SZ, (seedSz - seedIdx));
|
---|
670 | }
|
---|
671 |
|
---|
672 | return ret;
|
---|
673 | }
|
---|
674 | #endif /* HAVE_HASHDRBG */
|
---|
675 | /* End NIST DRBG Code */
|
---|
676 |
|
---|
677 |
|
---|
678 | static int _InitRng(WC_RNG* rng, byte* nonce, word32 nonceSz,
|
---|
679 | void* heap, int devId)
|
---|
680 | {
|
---|
681 | int ret = RNG_FAILURE_E;
|
---|
682 | #ifdef HAVE_HASHDRBG
|
---|
683 | word32 seedSz = SEED_SZ + SEED_BLOCK_SZ;
|
---|
684 | #endif
|
---|
685 |
|
---|
686 | (void)nonce;
|
---|
687 | (void)nonceSz;
|
---|
688 |
|
---|
689 | if (rng == NULL)
|
---|
690 | return BAD_FUNC_ARG;
|
---|
691 | if (nonce == NULL && nonceSz != 0)
|
---|
692 | return BAD_FUNC_ARG;
|
---|
693 |
|
---|
694 | #ifdef WOLFSSL_HEAP_TEST
|
---|
695 | rng->heap = (void*)WOLFSSL_HEAP_TEST;
|
---|
696 | (void)heap;
|
---|
697 | #else
|
---|
698 | rng->heap = heap;
|
---|
699 | #endif
|
---|
700 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
701 | rng->devId = devId;
|
---|
702 | #else
|
---|
703 | (void)devId;
|
---|
704 | #endif
|
---|
705 |
|
---|
706 | #ifdef HAVE_HASHDRBG
|
---|
707 | /* init the DBRG to known values */
|
---|
708 | rng->drbg = NULL;
|
---|
709 | rng->status = DRBG_NOT_INIT;
|
---|
710 | #endif
|
---|
711 |
|
---|
712 | #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
|
---|
713 | /* init the intel RD seed and/or rand */
|
---|
714 | wc_InitRng_IntelRD();
|
---|
715 | #endif
|
---|
716 |
|
---|
717 | /* configure async RNG source if available */
|
---|
718 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
719 | ret = wolfAsync_DevCtxInit(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG,
|
---|
720 | rng->heap, rng->devId);
|
---|
721 | if (ret != 0)
|
---|
722 | return ret;
|
---|
723 | #endif
|
---|
724 |
|
---|
725 | #ifdef HAVE_INTEL_RDRAND
|
---|
726 | /* if CPU supports RDRAND, use it directly and by-pass DRBG init */
|
---|
727 | if (IS_INTEL_RDRAND(intel_flags))
|
---|
728 | return 0;
|
---|
729 | #endif
|
---|
730 |
|
---|
731 | #ifdef CUSTOM_RAND_GENERATE_BLOCK
|
---|
732 | ret = 0; /* success */
|
---|
733 | #else
|
---|
734 | #ifdef HAVE_HASHDRBG
|
---|
735 | if (nonceSz == 0)
|
---|
736 | seedSz = MAX_SEED_SZ;
|
---|
737 |
|
---|
738 | if (wc_RNG_HealthTestLocal(0) == 0) {
|
---|
739 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
740 | DECLARE_VAR(seed, byte, MAX_SEED_SZ, rng->heap);
|
---|
741 | #else
|
---|
742 | byte seed[MAX_SEED_SZ];
|
---|
743 | #endif
|
---|
744 |
|
---|
745 | rng->drbg =
|
---|
746 | (struct DRBG*)XMALLOC(sizeof(DRBG), rng->heap,
|
---|
747 | DYNAMIC_TYPE_RNG);
|
---|
748 | if (rng->drbg == NULL) {
|
---|
749 | ret = MEMORY_E;
|
---|
750 | }
|
---|
751 | else {
|
---|
752 | ret = wc_GenerateSeed(&rng->seed, seed, seedSz);
|
---|
753 | if (ret != 0)
|
---|
754 | ret = DRBG_FAILURE;
|
---|
755 | else
|
---|
756 | ret = wc_RNG_TestSeed(seed, seedSz);
|
---|
757 |
|
---|
758 | if (ret == DRBG_SUCCESS)
|
---|
759 | ret = Hash_DRBG_Instantiate(rng->drbg,
|
---|
760 | seed + SEED_BLOCK_SZ, seedSz - SEED_BLOCK_SZ,
|
---|
761 | nonce, nonceSz, rng->heap, devId);
|
---|
762 |
|
---|
763 | if (ret == DRBG_SUCCESS)
|
---|
764 | ret = Hash_DRBG_Generate(rng->drbg, NULL, 0);
|
---|
765 | }
|
---|
766 |
|
---|
767 | ForceZero(seed, seedSz);
|
---|
768 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
769 | FREE_VAR(seed, rng->heap);
|
---|
770 | #endif
|
---|
771 | }
|
---|
772 | else
|
---|
773 | ret = DRBG_CONT_FAILURE;
|
---|
774 |
|
---|
775 | if (ret == DRBG_SUCCESS) {
|
---|
776 | rng->status = DRBG_OK;
|
---|
777 | ret = 0;
|
---|
778 | }
|
---|
779 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
780 | rng->status = DRBG_CONT_FAILED;
|
---|
781 | ret = DRBG_CONT_FIPS_E;
|
---|
782 | }
|
---|
783 | else if (ret == DRBG_FAILURE) {
|
---|
784 | rng->status = DRBG_FAILED;
|
---|
785 | ret = RNG_FAILURE_E;
|
---|
786 | }
|
---|
787 | else {
|
---|
788 | rng->status = DRBG_FAILED;
|
---|
789 | }
|
---|
790 | #endif /* HAVE_HASHDRBG */
|
---|
791 | #endif /* CUSTOM_RAND_GENERATE_BLOCK */
|
---|
792 |
|
---|
793 | return ret;
|
---|
794 | }
|
---|
795 |
|
---|
796 |
|
---|
797 | int wc_InitRng(WC_RNG* rng)
|
---|
798 | {
|
---|
799 | return _InitRng(rng, NULL, 0, NULL, INVALID_DEVID);
|
---|
800 | }
|
---|
801 |
|
---|
802 |
|
---|
803 | int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId)
|
---|
804 | {
|
---|
805 | return _InitRng(rng, NULL, 0, heap, devId);
|
---|
806 | }
|
---|
807 |
|
---|
808 |
|
---|
809 | int wc_InitRngNonce(WC_RNG* rng, byte* nonce, word32 nonceSz)
|
---|
810 | {
|
---|
811 | return _InitRng(rng, nonce, nonceSz, NULL, INVALID_DEVID);
|
---|
812 | }
|
---|
813 |
|
---|
814 |
|
---|
815 | int wc_InitRngNonce_ex(WC_RNG* rng, byte* nonce, word32 nonceSz,
|
---|
816 | void* heap, int devId)
|
---|
817 | {
|
---|
818 | return _InitRng(rng, nonce, nonceSz, heap, devId);
|
---|
819 | }
|
---|
820 |
|
---|
821 |
|
---|
822 | /* place a generated block in output */
|
---|
823 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
|
---|
824 | {
|
---|
825 | int ret;
|
---|
826 |
|
---|
827 | if (rng == NULL || output == NULL)
|
---|
828 | return BAD_FUNC_ARG;
|
---|
829 |
|
---|
830 | #ifdef HAVE_INTEL_RDRAND
|
---|
831 | if (IS_INTEL_RDRAND(intel_flags))
|
---|
832 | return wc_GenerateRand_IntelRD(NULL, output, sz);
|
---|
833 | #endif
|
---|
834 |
|
---|
835 | #if defined(WOLFSSL_ASYNC_CRYPT)
|
---|
836 | if (rng->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RNG) {
|
---|
837 | /* these are blocking */
|
---|
838 | #ifdef HAVE_CAVIUM
|
---|
839 | return NitroxRngGenerateBlock(rng, output, sz);
|
---|
840 | #elif defined(HAVE_INTEL_QA) && defined(QAT_ENABLE_RNG)
|
---|
841 | return IntelQaDrbg(&rng->asyncDev, output, sz);
|
---|
842 | #else
|
---|
843 | /* simulator not supported */
|
---|
844 | #endif
|
---|
845 | }
|
---|
846 | #endif
|
---|
847 |
|
---|
848 | #ifdef CUSTOM_RAND_GENERATE_BLOCK
|
---|
849 | XMEMSET(output, 0, sz);
|
---|
850 | ret = CUSTOM_RAND_GENERATE_BLOCK(output, sz);
|
---|
851 | #else
|
---|
852 |
|
---|
853 | #ifdef HAVE_HASHDRBG
|
---|
854 | if (sz > RNG_MAX_BLOCK_LEN)
|
---|
855 | return BAD_FUNC_ARG;
|
---|
856 |
|
---|
857 | if (rng->status != DRBG_OK)
|
---|
858 | return RNG_FAILURE_E;
|
---|
859 |
|
---|
860 | ret = Hash_DRBG_Generate(rng->drbg, output, sz);
|
---|
861 | if (ret == DRBG_NEED_RESEED) {
|
---|
862 | if (wc_RNG_HealthTestLocal(1) == 0) {
|
---|
863 | byte newSeed[SEED_SZ + SEED_BLOCK_SZ];
|
---|
864 |
|
---|
865 | ret = wc_GenerateSeed(&rng->seed, newSeed,
|
---|
866 | SEED_SZ + SEED_BLOCK_SZ);
|
---|
867 | if (ret != 0)
|
---|
868 | ret = DRBG_FAILURE;
|
---|
869 | else
|
---|
870 | ret = wc_RNG_TestSeed(newSeed, SEED_SZ + SEED_BLOCK_SZ);
|
---|
871 |
|
---|
872 | if (ret == DRBG_SUCCESS)
|
---|
873 | ret = Hash_DRBG_Reseed(rng->drbg, newSeed + SEED_BLOCK_SZ,
|
---|
874 | SEED_SZ);
|
---|
875 | if (ret == DRBG_SUCCESS)
|
---|
876 | ret = Hash_DRBG_Generate(rng->drbg, NULL, 0);
|
---|
877 | if (ret == DRBG_SUCCESS)
|
---|
878 | ret = Hash_DRBG_Generate(rng->drbg, output, sz);
|
---|
879 |
|
---|
880 | ForceZero(newSeed, sizeof(newSeed));
|
---|
881 | }
|
---|
882 | else
|
---|
883 | ret = DRBG_CONT_FAILURE;
|
---|
884 | }
|
---|
885 |
|
---|
886 | if (ret == DRBG_SUCCESS) {
|
---|
887 | ret = 0;
|
---|
888 | }
|
---|
889 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
890 | ret = DRBG_CONT_FIPS_E;
|
---|
891 | rng->status = DRBG_CONT_FAILED;
|
---|
892 | }
|
---|
893 | else {
|
---|
894 | ret = RNG_FAILURE_E;
|
---|
895 | rng->status = DRBG_FAILED;
|
---|
896 | }
|
---|
897 | #else
|
---|
898 |
|
---|
899 | /* if we get here then there is an RNG configuration error */
|
---|
900 | ret = RNG_FAILURE_E;
|
---|
901 |
|
---|
902 | #endif /* HAVE_HASHDRBG */
|
---|
903 | #endif /* CUSTOM_RAND_GENERATE_BLOCK */
|
---|
904 |
|
---|
905 | return ret;
|
---|
906 | }
|
---|
907 |
|
---|
908 |
|
---|
909 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
910 | {
|
---|
911 | return wc_RNG_GenerateBlock(rng, b, 1);
|
---|
912 | }
|
---|
913 |
|
---|
914 |
|
---|
915 | int wc_FreeRng(WC_RNG* rng)
|
---|
916 | {
|
---|
917 | int ret = 0;
|
---|
918 |
|
---|
919 | if (rng == NULL)
|
---|
920 | return BAD_FUNC_ARG;
|
---|
921 |
|
---|
922 | #if defined(WOLFSSL_ASYNC_CRYPT)
|
---|
923 | wolfAsync_DevCtxFree(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG);
|
---|
924 | #endif
|
---|
925 |
|
---|
926 | #ifdef HAVE_HASHDRBG
|
---|
927 | if (rng->drbg != NULL) {
|
---|
928 | if (Hash_DRBG_Uninstantiate(rng->drbg) != DRBG_SUCCESS)
|
---|
929 | ret = RNG_FAILURE_E;
|
---|
930 |
|
---|
931 | XFREE(rng->drbg, rng->heap, DYNAMIC_TYPE_RNG);
|
---|
932 | rng->drbg = NULL;
|
---|
933 | }
|
---|
934 |
|
---|
935 | rng->status = DRBG_NOT_INIT;
|
---|
936 | #endif /* HAVE_HASHDRBG */
|
---|
937 |
|
---|
938 | return ret;
|
---|
939 | }
|
---|
940 |
|
---|
941 | #ifdef HAVE_HASHDRBG
|
---|
942 | int wc_RNG_HealthTest(int reseed, const byte* seedA, word32 seedASz,
|
---|
943 | const byte* seedB, word32 seedBSz,
|
---|
944 | byte* output, word32 outputSz)
|
---|
945 | {
|
---|
946 | return wc_RNG_HealthTest_ex(reseed, NULL, 0,
|
---|
947 | seedA, seedASz, seedB, seedBSz,
|
---|
948 | output, outputSz,
|
---|
949 | NULL, INVALID_DEVID);
|
---|
950 | }
|
---|
951 |
|
---|
952 |
|
---|
953 | int wc_RNG_HealthTest_ex(int reseed, const byte* nonce, word32 nonceSz,
|
---|
954 | const byte* seedA, word32 seedASz,
|
---|
955 | const byte* seedB, word32 seedBSz,
|
---|
956 | byte* output, word32 outputSz,
|
---|
957 | void* heap, int devId)
|
---|
958 | {
|
---|
959 | int ret = -1;
|
---|
960 | DRBG* drbg;
|
---|
961 | #ifndef WOLFSSL_SMALL_STACK
|
---|
962 | DRBG drbg_var;
|
---|
963 | #endif
|
---|
964 |
|
---|
965 | if (seedA == NULL || output == NULL) {
|
---|
966 | return BAD_FUNC_ARG;
|
---|
967 | }
|
---|
968 |
|
---|
969 | if (reseed != 0 && seedB == NULL) {
|
---|
970 | return BAD_FUNC_ARG;
|
---|
971 | }
|
---|
972 |
|
---|
973 | if (outputSz != RNG_HEALTH_TEST_CHECK_SIZE) {
|
---|
974 | return ret;
|
---|
975 | }
|
---|
976 |
|
---|
977 | #ifdef WOLFSSL_SMALL_STACK
|
---|
978 | drbg = (DRBG*)XMALLOC(sizeof(DRBG), NULL, DYNAMIC_TYPE_RNG);
|
---|
979 | if (drbg == NULL) {
|
---|
980 | return MEMORY_E;
|
---|
981 | }
|
---|
982 | #else
|
---|
983 | drbg = &drbg_var;
|
---|
984 | #endif
|
---|
985 |
|
---|
986 | if (Hash_DRBG_Instantiate(drbg, seedA, seedASz, nonce, nonceSz,
|
---|
987 | heap, devId) != 0) {
|
---|
988 | goto exit_rng_ht;
|
---|
989 | }
|
---|
990 |
|
---|
991 | if (reseed) {
|
---|
992 | if (Hash_DRBG_Reseed(drbg, seedB, seedBSz) != 0) {
|
---|
993 | goto exit_rng_ht;
|
---|
994 | }
|
---|
995 | }
|
---|
996 |
|
---|
997 | if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) {
|
---|
998 | goto exit_rng_ht;
|
---|
999 | }
|
---|
1000 |
|
---|
1001 | if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) {
|
---|
1002 | goto exit_rng_ht;
|
---|
1003 | }
|
---|
1004 |
|
---|
1005 | /* Mark success */
|
---|
1006 | ret = 0;
|
---|
1007 |
|
---|
1008 | exit_rng_ht:
|
---|
1009 |
|
---|
1010 | /* This is safe to call even if Hash_DRBG_Instantiate fails */
|
---|
1011 | if (Hash_DRBG_Uninstantiate(drbg) != 0) {
|
---|
1012 | ret = -1;
|
---|
1013 | }
|
---|
1014 |
|
---|
1015 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1016 | XFREE(drbg, NULL, DYNAMIC_TYPE_RNG);
|
---|
1017 | #endif
|
---|
1018 |
|
---|
1019 | return ret;
|
---|
1020 | }
|
---|
1021 |
|
---|
1022 |
|
---|
1023 | const byte seedA[] = {
|
---|
1024 | 0x63, 0x36, 0x33, 0x77, 0xe4, 0x1e, 0x86, 0x46, 0x8d, 0xeb, 0x0a, 0xb4,
|
---|
1025 | 0xa8, 0xed, 0x68, 0x3f, 0x6a, 0x13, 0x4e, 0x47, 0xe0, 0x14, 0xc7, 0x00,
|
---|
1026 | 0x45, 0x4e, 0x81, 0xe9, 0x53, 0x58, 0xa5, 0x69, 0x80, 0x8a, 0xa3, 0x8f,
|
---|
1027 | 0x2a, 0x72, 0xa6, 0x23, 0x59, 0x91, 0x5a, 0x9f, 0x8a, 0x04, 0xca, 0x68
|
---|
1028 | };
|
---|
1029 |
|
---|
1030 | const byte reseedSeedA[] = {
|
---|
1031 | 0xe6, 0x2b, 0x8a, 0x8e, 0xe8, 0xf1, 0x41, 0xb6, 0x98, 0x05, 0x66, 0xe3,
|
---|
1032 | 0xbf, 0xe3, 0xc0, 0x49, 0x03, 0xda, 0xd4, 0xac, 0x2c, 0xdf, 0x9f, 0x22,
|
---|
1033 | 0x80, 0x01, 0x0a, 0x67, 0x39, 0xbc, 0x83, 0xd3
|
---|
1034 | };
|
---|
1035 |
|
---|
1036 | const byte outputA[] = {
|
---|
1037 | 0x04, 0xee, 0xc6, 0x3b, 0xb2, 0x31, 0xdf, 0x2c, 0x63, 0x0a, 0x1a, 0xfb,
|
---|
1038 | 0xe7, 0x24, 0x94, 0x9d, 0x00, 0x5a, 0x58, 0x78, 0x51, 0xe1, 0xaa, 0x79,
|
---|
1039 | 0x5e, 0x47, 0x73, 0x47, 0xc8, 0xb0, 0x56, 0x62, 0x1c, 0x18, 0xbd, 0xdc,
|
---|
1040 | 0xdd, 0x8d, 0x99, 0xfc, 0x5f, 0xc2, 0xb9, 0x20, 0x53, 0xd8, 0xcf, 0xac,
|
---|
1041 | 0xfb, 0x0b, 0xb8, 0x83, 0x12, 0x05, 0xfa, 0xd1, 0xdd, 0xd6, 0xc0, 0x71,
|
---|
1042 | 0x31, 0x8a, 0x60, 0x18, 0xf0, 0x3b, 0x73, 0xf5, 0xed, 0xe4, 0xd4, 0xd0,
|
---|
1043 | 0x71, 0xf9, 0xde, 0x03, 0xfd, 0x7a, 0xea, 0x10, 0x5d, 0x92, 0x99, 0xb8,
|
---|
1044 | 0xaf, 0x99, 0xaa, 0x07, 0x5b, 0xdb, 0x4d, 0xb9, 0xaa, 0x28, 0xc1, 0x8d,
|
---|
1045 | 0x17, 0x4b, 0x56, 0xee, 0x2a, 0x01, 0x4d, 0x09, 0x88, 0x96, 0xff, 0x22,
|
---|
1046 | 0x82, 0xc9, 0x55, 0xa8, 0x19, 0x69, 0xe0, 0x69, 0xfa, 0x8c, 0xe0, 0x07,
|
---|
1047 | 0xa1, 0x80, 0x18, 0x3a, 0x07, 0xdf, 0xae, 0x17
|
---|
1048 | };
|
---|
1049 |
|
---|
1050 | const byte seedB[] = {
|
---|
1051 | 0xa6, 0x5a, 0xd0, 0xf3, 0x45, 0xdb, 0x4e, 0x0e, 0xff, 0xe8, 0x75, 0xc3,
|
---|
1052 | 0xa2, 0xe7, 0x1f, 0x42, 0xc7, 0x12, 0x9d, 0x62, 0x0f, 0xf5, 0xc1, 0x19,
|
---|
1053 | 0xa9, 0xef, 0x55, 0xf0, 0x51, 0x85, 0xe0, 0xfb, /* nonce next */
|
---|
1054 | 0x85, 0x81, 0xf9, 0x31, 0x75, 0x17, 0x27, 0x6e, 0x06, 0xe9, 0x60, 0x7d,
|
---|
1055 | 0xdb, 0xcb, 0xcc, 0x2e
|
---|
1056 | };
|
---|
1057 |
|
---|
1058 | const byte outputB[] = {
|
---|
1059 | 0xd3, 0xe1, 0x60, 0xc3, 0x5b, 0x99, 0xf3, 0x40, 0xb2, 0x62, 0x82, 0x64,
|
---|
1060 | 0xd1, 0x75, 0x10, 0x60, 0xe0, 0x04, 0x5d, 0xa3, 0x83, 0xff, 0x57, 0xa5,
|
---|
1061 | 0x7d, 0x73, 0xa6, 0x73, 0xd2, 0xb8, 0xd8, 0x0d, 0xaa, 0xf6, 0xa6, 0xc3,
|
---|
1062 | 0x5a, 0x91, 0xbb, 0x45, 0x79, 0xd7, 0x3f, 0xd0, 0xc8, 0xfe, 0xd1, 0x11,
|
---|
1063 | 0xb0, 0x39, 0x13, 0x06, 0x82, 0x8a, 0xdf, 0xed, 0x52, 0x8f, 0x01, 0x81,
|
---|
1064 | 0x21, 0xb3, 0xfe, 0xbd, 0xc3, 0x43, 0xe7, 0x97, 0xb8, 0x7d, 0xbb, 0x63,
|
---|
1065 | 0xdb, 0x13, 0x33, 0xde, 0xd9, 0xd1, 0xec, 0xe1, 0x77, 0xcf, 0xa6, 0xb7,
|
---|
1066 | 0x1f, 0xe8, 0xab, 0x1d, 0xa4, 0x66, 0x24, 0xed, 0x64, 0x15, 0xe5, 0x1c,
|
---|
1067 | 0xcd, 0xe2, 0xc7, 0xca, 0x86, 0xe2, 0x83, 0x99, 0x0e, 0xea, 0xeb, 0x91,
|
---|
1068 | 0x12, 0x04, 0x15, 0x52, 0x8b, 0x22, 0x95, 0x91, 0x02, 0x81, 0xb0, 0x2d,
|
---|
1069 | 0xd4, 0x31, 0xf4, 0xc9, 0xf7, 0x04, 0x27, 0xdf
|
---|
1070 | };
|
---|
1071 |
|
---|
1072 |
|
---|
1073 | static int wc_RNG_HealthTestLocal(int reseed)
|
---|
1074 | {
|
---|
1075 | int ret = 0;
|
---|
1076 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1077 | byte* check;
|
---|
1078 | #else
|
---|
1079 | byte check[RNG_HEALTH_TEST_CHECK_SIZE];
|
---|
1080 | #endif
|
---|
1081 |
|
---|
1082 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1083 | check = (byte*)XMALLOC(RNG_HEALTH_TEST_CHECK_SIZE, NULL,
|
---|
1084 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
1085 | if (check == NULL) {
|
---|
1086 | return MEMORY_E;
|
---|
1087 | }
|
---|
1088 | #endif
|
---|
1089 |
|
---|
1090 | if (reseed) {
|
---|
1091 | ret = wc_RNG_HealthTest(1, seedA, sizeof(seedA),
|
---|
1092 | reseedSeedA, sizeof(reseedSeedA),
|
---|
1093 | check, RNG_HEALTH_TEST_CHECK_SIZE);
|
---|
1094 | if (ret == 0) {
|
---|
1095 | if (ConstantCompare(check, outputA,
|
---|
1096 | RNG_HEALTH_TEST_CHECK_SIZE) != 0)
|
---|
1097 | ret = -1;
|
---|
1098 | }
|
---|
1099 | }
|
---|
1100 | else {
|
---|
1101 | ret = wc_RNG_HealthTest(0, seedB, sizeof(seedB),
|
---|
1102 | NULL, 0,
|
---|
1103 | check, RNG_HEALTH_TEST_CHECK_SIZE);
|
---|
1104 | if (ret == 0) {
|
---|
1105 | if (ConstantCompare(check, outputB,
|
---|
1106 | RNG_HEALTH_TEST_CHECK_SIZE) != 0)
|
---|
1107 | ret = -1;
|
---|
1108 | }
|
---|
1109 |
|
---|
1110 | /* The previous test cases use a large seed instead of a seed and nonce.
|
---|
1111 | * seedB is actually from a test case with a seed and nonce, and
|
---|
1112 | * just concatenates them. The pivot point between seed and nonce is
|
---|
1113 | * byte 32, feed them into the health test separately. */
|
---|
1114 | if (ret == 0) {
|
---|
1115 | ret = wc_RNG_HealthTest_ex(0,
|
---|
1116 | seedB + 32, sizeof(seedB) - 32,
|
---|
1117 | seedB, 32,
|
---|
1118 | NULL, 0,
|
---|
1119 | check, RNG_HEALTH_TEST_CHECK_SIZE,
|
---|
1120 | NULL, INVALID_DEVID);
|
---|
1121 | if (ret == 0) {
|
---|
1122 | if (ConstantCompare(check, outputB, sizeof(outputB)) != 0)
|
---|
1123 | ret = -1;
|
---|
1124 | }
|
---|
1125 | }
|
---|
1126 | }
|
---|
1127 |
|
---|
1128 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1129 | XFREE(check, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
1130 | #endif
|
---|
1131 |
|
---|
1132 | return ret;
|
---|
1133 | }
|
---|
1134 |
|
---|
1135 | #endif /* HAVE_HASHDRBG */
|
---|
1136 |
|
---|
1137 |
|
---|
1138 | #ifdef HAVE_WNR
|
---|
1139 |
|
---|
1140 | /*
|
---|
1141 | * Init global Whitewood netRandom context
|
---|
1142 | * Returns 0 on success, negative on error
|
---|
1143 | */
|
---|
1144 | int wc_InitNetRandom(const char* configFile, wnr_hmac_key hmac_cb, int timeout)
|
---|
1145 | {
|
---|
1146 | if (configFile == NULL || timeout < 0)
|
---|
1147 | return BAD_FUNC_ARG;
|
---|
1148 |
|
---|
1149 | if (wnr_mutex_init > 0) {
|
---|
1150 | WOLFSSL_MSG("netRandom context already created, skipping");
|
---|
1151 | return 0;
|
---|
1152 | }
|
---|
1153 |
|
---|
1154 | if (wc_InitMutex(&wnr_mutex) != 0) {
|
---|
1155 | WOLFSSL_MSG("Bad Init Mutex wnr_mutex");
|
---|
1156 | return BAD_MUTEX_E;
|
---|
1157 | }
|
---|
1158 | wnr_mutex_init = 1;
|
---|
1159 |
|
---|
1160 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
1161 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex");
|
---|
1162 | return BAD_MUTEX_E;
|
---|
1163 | }
|
---|
1164 |
|
---|
1165 | /* store entropy timeout */
|
---|
1166 | wnr_timeout = timeout;
|
---|
1167 |
|
---|
1168 | /* create global wnr_context struct */
|
---|
1169 | if (wnr_create(&wnr_ctx) != WNR_ERROR_NONE) {
|
---|
1170 | WOLFSSL_MSG("Error creating global netRandom context");
|
---|
1171 | return RNG_FAILURE_E;
|
---|
1172 | }
|
---|
1173 |
|
---|
1174 | /* load config file */
|
---|
1175 | if (wnr_config_loadf(wnr_ctx, (char*)configFile) != WNR_ERROR_NONE) {
|
---|
1176 | WOLFSSL_MSG("Error loading config file into netRandom context");
|
---|
1177 | wnr_destroy(wnr_ctx);
|
---|
1178 | wnr_ctx = NULL;
|
---|
1179 | return RNG_FAILURE_E;
|
---|
1180 | }
|
---|
1181 |
|
---|
1182 | /* create/init polling mechanism */
|
---|
1183 | if (wnr_poll_create() != WNR_ERROR_NONE) {
|
---|
1184 | printf("ERROR: wnr_poll_create() failed\n");
|
---|
1185 | WOLFSSL_MSG("Error initializing netRandom polling mechanism");
|
---|
1186 | wnr_destroy(wnr_ctx);
|
---|
1187 | wnr_ctx = NULL;
|
---|
1188 | return RNG_FAILURE_E;
|
---|
1189 | }
|
---|
1190 |
|
---|
1191 | /* validate config, set HMAC callback (optional) */
|
---|
1192 | if (wnr_setup(wnr_ctx, hmac_cb) != WNR_ERROR_NONE) {
|
---|
1193 | WOLFSSL_MSG("Error setting up netRandom context");
|
---|
1194 | wnr_destroy(wnr_ctx);
|
---|
1195 | wnr_ctx = NULL;
|
---|
1196 | wnr_poll_destroy();
|
---|
1197 | return RNG_FAILURE_E;
|
---|
1198 | }
|
---|
1199 |
|
---|
1200 | wc_UnLockMutex(&wnr_mutex);
|
---|
1201 |
|
---|
1202 | return 0;
|
---|
1203 | }
|
---|
1204 |
|
---|
1205 | /*
|
---|
1206 | * Free global Whitewood netRandom context
|
---|
1207 | * Returns 0 on success, negative on error
|
---|
1208 | */
|
---|
1209 | int wc_FreeNetRandom(void)
|
---|
1210 | {
|
---|
1211 | if (wnr_mutex_init > 0) {
|
---|
1212 |
|
---|
1213 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
1214 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex");
|
---|
1215 | return BAD_MUTEX_E;
|
---|
1216 | }
|
---|
1217 |
|
---|
1218 | if (wnr_ctx != NULL) {
|
---|
1219 | wnr_destroy(wnr_ctx);
|
---|
1220 | wnr_ctx = NULL;
|
---|
1221 | }
|
---|
1222 | wnr_poll_destroy();
|
---|
1223 |
|
---|
1224 | wc_UnLockMutex(&wnr_mutex);
|
---|
1225 |
|
---|
1226 | wc_FreeMutex(&wnr_mutex);
|
---|
1227 | wnr_mutex_init = 0;
|
---|
1228 | }
|
---|
1229 |
|
---|
1230 | return 0;
|
---|
1231 | }
|
---|
1232 |
|
---|
1233 | #endif /* HAVE_WNR */
|
---|
1234 |
|
---|
1235 |
|
---|
1236 | #if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED)
|
---|
1237 |
|
---|
1238 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
1239 | /* need more retries if multiple cores */
|
---|
1240 | #define INTELRD_RETRY (32 * 8)
|
---|
1241 | #else
|
---|
1242 | #define INTELRD_RETRY 32
|
---|
1243 | #endif
|
---|
1244 |
|
---|
1245 | #ifdef HAVE_INTEL_RDSEED
|
---|
1246 |
|
---|
1247 | #ifndef USE_WINDOWS_API
|
---|
1248 |
|
---|
1249 | /* return 0 on success */
|
---|
1250 | static WC_INLINE int IntelRDseed64(word64* seed)
|
---|
1251 | {
|
---|
1252 | unsigned char ok;
|
---|
1253 |
|
---|
1254 | __asm__ volatile("rdseed %0; setc %1":"=r"(*seed), "=qm"(ok));
|
---|
1255 | return (ok) ? 0 : -1;
|
---|
1256 | }
|
---|
1257 |
|
---|
1258 | #else /* USE_WINDOWS_API */
|
---|
1259 | /* The compiler Visual Studio uses does not allow inline assembly.
|
---|
1260 | * It does allow for Intel intrinsic functions. */
|
---|
1261 |
|
---|
1262 | /* return 0 on success */
|
---|
1263 | static WC_INLINE int IntelRDseed64(word64* seed)
|
---|
1264 | {
|
---|
1265 | int ok;
|
---|
1266 |
|
---|
1267 | ok = _rdseed64_step(seed);
|
---|
1268 | return (ok) ? 0 : -1;
|
---|
1269 | }
|
---|
1270 |
|
---|
1271 | #endif /* USE_WINDOWS_API */
|
---|
1272 |
|
---|
1273 | /* return 0 on success */
|
---|
1274 | static WC_INLINE int IntelRDseed64_r(word64* rnd)
|
---|
1275 | {
|
---|
1276 | int i;
|
---|
1277 | for (i = 0; i < INTELRD_RETRY; i++) {
|
---|
1278 | if (IntelRDseed64(rnd) == 0)
|
---|
1279 | return 0;
|
---|
1280 | }
|
---|
1281 | return -1;
|
---|
1282 | }
|
---|
1283 |
|
---|
1284 | /* return 0 on success */
|
---|
1285 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
1286 | {
|
---|
1287 | int ret;
|
---|
1288 | word64 rndTmp;
|
---|
1289 |
|
---|
1290 | (void)os;
|
---|
1291 |
|
---|
1292 | if (!IS_INTEL_RDSEED(intel_flags))
|
---|
1293 | return -1;
|
---|
1294 |
|
---|
1295 | for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64),
|
---|
1296 | output += sizeof(word64)) {
|
---|
1297 | ret = IntelRDseed64_r((word64*)output);
|
---|
1298 | if (ret != 0)
|
---|
1299 | return ret;
|
---|
1300 | }
|
---|
1301 | if (sz == 0)
|
---|
1302 | return 0;
|
---|
1303 |
|
---|
1304 | /* handle unaligned remainder */
|
---|
1305 | ret = IntelRDseed64_r(&rndTmp);
|
---|
1306 | if (ret != 0)
|
---|
1307 | return ret;
|
---|
1308 |
|
---|
1309 | XMEMCPY(output, &rndTmp, sz);
|
---|
1310 | ForceZero(&rndTmp, sizeof(rndTmp));
|
---|
1311 |
|
---|
1312 | return 0;
|
---|
1313 | }
|
---|
1314 |
|
---|
1315 | #endif /* HAVE_INTEL_RDSEED */
|
---|
1316 |
|
---|
1317 | #ifdef HAVE_INTEL_RDRAND
|
---|
1318 |
|
---|
1319 | #ifndef USE_WINDOWS_API
|
---|
1320 |
|
---|
1321 | /* return 0 on success */
|
---|
1322 | static WC_INLINE int IntelRDrand64(word64 *rnd)
|
---|
1323 | {
|
---|
1324 | unsigned char ok;
|
---|
1325 |
|
---|
1326 | __asm__ volatile("rdrand %0; setc %1":"=r"(*rnd), "=qm"(ok));
|
---|
1327 |
|
---|
1328 | return (ok) ? 0 : -1;
|
---|
1329 | }
|
---|
1330 |
|
---|
1331 | #else /* USE_WINDOWS_API */
|
---|
1332 | /* The compiler Visual Studio uses does not allow inline assembly.
|
---|
1333 | * It does allow for Intel intrinsic functions. */
|
---|
1334 |
|
---|
1335 | /* return 0 on success */
|
---|
1336 | static WC_INLINE int IntelRDrand64(word64 *rnd)
|
---|
1337 | {
|
---|
1338 | int ok;
|
---|
1339 |
|
---|
1340 | ok = _rdrand64_step(rnd);
|
---|
1341 |
|
---|
1342 | return (ok) ? 0 : -1;
|
---|
1343 | }
|
---|
1344 |
|
---|
1345 | #endif /* USE_WINDOWS_API */
|
---|
1346 |
|
---|
1347 | /* return 0 on success */
|
---|
1348 | static WC_INLINE int IntelRDrand64_r(word64 *rnd)
|
---|
1349 | {
|
---|
1350 | int i;
|
---|
1351 | for (i = 0; i < INTELRD_RETRY; i++) {
|
---|
1352 | if (IntelRDrand64(rnd) == 0)
|
---|
1353 | return 0;
|
---|
1354 | }
|
---|
1355 | return -1;
|
---|
1356 | }
|
---|
1357 |
|
---|
1358 | /* return 0 on success */
|
---|
1359 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
1360 | {
|
---|
1361 | int ret;
|
---|
1362 | word64 rndTmp;
|
---|
1363 |
|
---|
1364 | (void)os;
|
---|
1365 |
|
---|
1366 | if (!IS_INTEL_RDRAND(intel_flags))
|
---|
1367 | return -1;
|
---|
1368 |
|
---|
1369 | for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64),
|
---|
1370 | output += sizeof(word64)) {
|
---|
1371 | ret = IntelRDrand64_r((word64 *)output);
|
---|
1372 | if (ret != 0)
|
---|
1373 | return ret;
|
---|
1374 | }
|
---|
1375 | if (sz == 0)
|
---|
1376 | return 0;
|
---|
1377 |
|
---|
1378 | /* handle unaligned remainder */
|
---|
1379 | ret = IntelRDrand64_r(&rndTmp);
|
---|
1380 | if (ret != 0)
|
---|
1381 | return ret;
|
---|
1382 |
|
---|
1383 | XMEMCPY(output, &rndTmp, sz);
|
---|
1384 |
|
---|
1385 | return 0;
|
---|
1386 | }
|
---|
1387 |
|
---|
1388 | #endif /* HAVE_INTEL_RDRAND */
|
---|
1389 | #endif /* HAVE_INTEL_RDRAND || HAVE_INTEL_RDSEED */
|
---|
1390 |
|
---|
1391 |
|
---|
1392 | /* Begin wc_GenerateSeed Implementations */
|
---|
1393 | #if defined(CUSTOM_RAND_GENERATE_SEED)
|
---|
1394 |
|
---|
1395 | /* Implement your own random generation function
|
---|
1396 | * Return 0 to indicate success
|
---|
1397 | * int rand_gen_seed(byte* output, word32 sz);
|
---|
1398 | * #define CUSTOM_RAND_GENERATE_SEED rand_gen_seed */
|
---|
1399 |
|
---|
1400 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1401 | {
|
---|
1402 | extern int CUSTOM_RAND_GENERATE_SEED(byte* output, word32 sz);
|
---|
1403 | (void)os; /* Suppress unused arg warning */
|
---|
1404 | return CUSTOM_RAND_GENERATE_SEED(output, sz);
|
---|
1405 | }
|
---|
1406 |
|
---|
1407 | #elif defined(CUSTOM_RAND_GENERATE_SEED_OS)
|
---|
1408 |
|
---|
1409 | /* Implement your own random generation function,
|
---|
1410 | * which includes OS_Seed.
|
---|
1411 | * Return 0 to indicate success
|
---|
1412 | * int rand_gen_seed(OS_Seed* os, byte* output, word32 sz);
|
---|
1413 | * #define CUSTOM_RAND_GENERATE_SEED_OS rand_gen_seed */
|
---|
1414 |
|
---|
1415 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1416 | {
|
---|
1417 | return CUSTOM_RAND_GENERATE_SEED_OS(os, output, sz);
|
---|
1418 | }
|
---|
1419 |
|
---|
1420 | #elif defined(CUSTOM_RAND_GENERATE)
|
---|
1421 |
|
---|
1422 | /* Implement your own random generation function
|
---|
1423 | * word32 rand_gen(void);
|
---|
1424 | * #define CUSTOM_RAND_GENERATE rand_gen */
|
---|
1425 |
|
---|
1426 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1427 | {
|
---|
1428 | word32 i = 0;
|
---|
1429 |
|
---|
1430 | (void)os;
|
---|
1431 |
|
---|
1432 | while (i < sz)
|
---|
1433 | {
|
---|
1434 | /* If not aligned or there is odd/remainder */
|
---|
1435 | if( (i + sizeof(CUSTOM_RAND_TYPE)) > sz ||
|
---|
1436 | ((wolfssl_word)&output[i] % sizeof(CUSTOM_RAND_TYPE)) != 0
|
---|
1437 | ) {
|
---|
1438 | /* Single byte at a time */
|
---|
1439 | output[i++] = (byte)CUSTOM_RAND_GENERATE();
|
---|
1440 | }
|
---|
1441 | else {
|
---|
1442 | /* Use native 8, 16, 32 or 64 copy instruction */
|
---|
1443 | *((CUSTOM_RAND_TYPE*)&output[i]) = CUSTOM_RAND_GENERATE();
|
---|
1444 | i += sizeof(CUSTOM_RAND_TYPE);
|
---|
1445 | }
|
---|
1446 | }
|
---|
1447 |
|
---|
1448 | return 0;
|
---|
1449 | }
|
---|
1450 |
|
---|
1451 | #elif defined(WOLFSSL_SGX)
|
---|
1452 |
|
---|
1453 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1454 | {
|
---|
1455 | int ret = !SGX_SUCCESS;
|
---|
1456 | int i, read_max = 10;
|
---|
1457 |
|
---|
1458 | for (i = 0; i < read_max && ret != SGX_SUCCESS; i++) {
|
---|
1459 | ret = sgx_read_rand(output, sz);
|
---|
1460 | }
|
---|
1461 |
|
---|
1462 | (void)os;
|
---|
1463 | return (ret == SGX_SUCCESS) ? 0 : 1;
|
---|
1464 | }
|
---|
1465 |
|
---|
1466 | #elif defined(USE_WINDOWS_API)
|
---|
1467 |
|
---|
1468 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1469 | {
|
---|
1470 | #ifdef HAVE_INTEL_RDSEED
|
---|
1471 | if (IS_INTEL_RDSEED(intel_flags)) {
|
---|
1472 | if (!wc_GenerateSeed_IntelRD(NULL, output, sz)) {
|
---|
1473 | /* success, we're done */
|
---|
1474 | return 0;
|
---|
1475 | }
|
---|
1476 | #ifdef FORCE_FAILURE_RDSEED
|
---|
1477 | /* don't fall back to CryptoAPI */
|
---|
1478 | return READ_RAN_E;
|
---|
1479 | #endif
|
---|
1480 | }
|
---|
1481 | #endif /* HAVE_INTEL_RDSEED */
|
---|
1482 |
|
---|
1483 | if(!CryptAcquireContext(&os->handle, 0, 0, PROV_RSA_FULL,
|
---|
1484 | CRYPT_VERIFYCONTEXT))
|
---|
1485 | return WINCRYPT_E;
|
---|
1486 |
|
---|
1487 | if (!CryptGenRandom(os->handle, sz, output))
|
---|
1488 | return CRYPTGEN_E;
|
---|
1489 |
|
---|
1490 | CryptReleaseContext(os->handle, 0);
|
---|
1491 |
|
---|
1492 | return 0;
|
---|
1493 | }
|
---|
1494 |
|
---|
1495 |
|
---|
1496 | #elif defined(HAVE_RTP_SYS) || defined(EBSNET)
|
---|
1497 |
|
---|
1498 | #include "rtprand.h" /* rtp_rand () */
|
---|
1499 | #include "rtptime.h" /* rtp_get_system_msec() */
|
---|
1500 |
|
---|
1501 |
|
---|
1502 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1503 | {
|
---|
1504 | int i;
|
---|
1505 | rtp_srand(rtp_get_system_msec());
|
---|
1506 |
|
---|
1507 | for (i = 0; i < sz; i++ ) {
|
---|
1508 | output[i] = rtp_rand() % 256;
|
---|
1509 | if ( (i % 8) == 7)
|
---|
1510 | rtp_srand(rtp_get_system_msec());
|
---|
1511 | }
|
---|
1512 |
|
---|
1513 | return 0;
|
---|
1514 | }
|
---|
1515 |
|
---|
1516 |
|
---|
1517 | #elif defined(MICROCHIP_PIC32)
|
---|
1518 |
|
---|
1519 | #ifdef MICROCHIP_MPLAB_HARMONY
|
---|
1520 | #define PIC32_SEED_COUNT _CP0_GET_COUNT
|
---|
1521 | #else
|
---|
1522 | #if !defined(WOLFSSL_MICROCHIP_PIC32MZ)
|
---|
1523 | #include <peripheral/timer.h>
|
---|
1524 | #endif
|
---|
1525 | extern word32 ReadCoreTimer(void);
|
---|
1526 | #define PIC32_SEED_COUNT ReadCoreTimer
|
---|
1527 | #endif
|
---|
1528 |
|
---|
1529 | #ifdef WOLFSSL_PIC32MZ_RNG
|
---|
1530 | #include "xc.h"
|
---|
1531 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1532 | {
|
---|
1533 | int i;
|
---|
1534 | byte rnd[8];
|
---|
1535 | word32 *rnd32 = (word32 *)rnd;
|
---|
1536 | word32 size = sz;
|
---|
1537 | byte* op = output;
|
---|
1538 |
|
---|
1539 | #if ((__PIC32_FEATURE_SET0 == 'E') && (__PIC32_FEATURE_SET1 == 'C'))
|
---|
1540 | RNGNUMGEN1 = _CP0_GET_COUNT();
|
---|
1541 | RNGPOLY1 = _CP0_GET_COUNT();
|
---|
1542 | RNGPOLY2 = _CP0_GET_COUNT();
|
---|
1543 | RNGNUMGEN2 = _CP0_GET_COUNT();
|
---|
1544 | #else
|
---|
1545 | // All others can be seeded from the TRNG
|
---|
1546 | RNGCONbits.TRNGMODE = 1;
|
---|
1547 | RNGCONbits.TRNGEN = 1;
|
---|
1548 | while (RNGCNT < 64);
|
---|
1549 | RNGCONbits.LOAD = 1;
|
---|
1550 | while (RNGCONbits.LOAD == 1);
|
---|
1551 | while (RNGCNT < 64);
|
---|
1552 | RNGPOLY2 = RNGSEED2;
|
---|
1553 | RNGPOLY1 = RNGSEED1;
|
---|
1554 | #endif
|
---|
1555 |
|
---|
1556 | RNGCONbits.PLEN = 0x40;
|
---|
1557 | RNGCONbits.PRNGEN = 1;
|
---|
1558 | for (i=0; i<5; i++) { /* wait for RNGNUMGEN ready */
|
---|
1559 | volatile int x;
|
---|
1560 | x = RNGNUMGEN1;
|
---|
1561 | x = RNGNUMGEN2;
|
---|
1562 | (void)x;
|
---|
1563 | }
|
---|
1564 | do {
|
---|
1565 | rnd32[0] = RNGNUMGEN1;
|
---|
1566 | rnd32[1] = RNGNUMGEN2;
|
---|
1567 |
|
---|
1568 | for(i=0; i<8; i++, op++) {
|
---|
1569 | *op = rnd[i];
|
---|
1570 | size --;
|
---|
1571 | if(size==0)break;
|
---|
1572 | }
|
---|
1573 | } while(size);
|
---|
1574 | return 0;
|
---|
1575 | }
|
---|
1576 | #else /* WOLFSSL_PIC32MZ_RNG */
|
---|
1577 | /* uses the core timer, in nanoseconds to seed srand */
|
---|
1578 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1579 | {
|
---|
1580 | int i;
|
---|
1581 | srand(PIC32_SEED_COUNT() * 25);
|
---|
1582 |
|
---|
1583 | for (i = 0; i < sz; i++ ) {
|
---|
1584 | output[i] = rand() % 256;
|
---|
1585 | if ( (i % 8) == 7)
|
---|
1586 | srand(PIC32_SEED_COUNT() * 25);
|
---|
1587 | }
|
---|
1588 | return 0;
|
---|
1589 | }
|
---|
1590 | #endif /* WOLFSSL_PIC32MZ_RNG */
|
---|
1591 |
|
---|
1592 | #elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) || \
|
---|
1593 | defined(FREESCALE_KSDK_BM) || defined(FREESCALE_FREE_RTOS)
|
---|
1594 |
|
---|
1595 | #if defined(FREESCALE_K70_RNGA) || defined(FREESCALE_RNGA)
|
---|
1596 | /*
|
---|
1597 | * wc_Generates a RNG seed using the Random Number Generator Accelerator
|
---|
1598 | * on the Kinetis K70. Documentation located in Chapter 37 of
|
---|
1599 | * K70 Sub-Family Reference Manual (see Note 3 in the README for link).
|
---|
1600 | */
|
---|
1601 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1602 | {
|
---|
1603 | word32 i;
|
---|
1604 |
|
---|
1605 | /* turn on RNGA module */
|
---|
1606 | #if defined(SIM_SCGC3_RNGA_MASK)
|
---|
1607 | SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK;
|
---|
1608 | #endif
|
---|
1609 | #if defined(SIM_SCGC6_RNGA_MASK)
|
---|
1610 | /* additionally needed for at least K64F */
|
---|
1611 | SIM_SCGC6 |= SIM_SCGC6_RNGA_MASK;
|
---|
1612 | #endif
|
---|
1613 |
|
---|
1614 | /* set SLP bit to 0 - "RNGA is not in sleep mode" */
|
---|
1615 | RNG_CR &= ~RNG_CR_SLP_MASK;
|
---|
1616 |
|
---|
1617 | /* set HA bit to 1 - "security violations masked" */
|
---|
1618 | RNG_CR |= RNG_CR_HA_MASK;
|
---|
1619 |
|
---|
1620 | /* set GO bit to 1 - "output register loaded with data" */
|
---|
1621 | RNG_CR |= RNG_CR_GO_MASK;
|
---|
1622 |
|
---|
1623 | for (i = 0; i < sz; i++) {
|
---|
1624 |
|
---|
1625 | /* wait for RNG FIFO to be full */
|
---|
1626 | while((RNG_SR & RNG_SR_OREG_LVL(0xF)) == 0) {}
|
---|
1627 |
|
---|
1628 | /* get value */
|
---|
1629 | output[i] = RNG_OR;
|
---|
1630 | }
|
---|
1631 |
|
---|
1632 | return 0;
|
---|
1633 | }
|
---|
1634 |
|
---|
1635 | #elif defined(FREESCALE_K53_RNGB) || defined(FREESCALE_RNGB)
|
---|
1636 | /*
|
---|
1637 | * wc_Generates a RNG seed using the Random Number Generator (RNGB)
|
---|
1638 | * on the Kinetis K53. Documentation located in Chapter 33 of
|
---|
1639 | * K53 Sub-Family Reference Manual (see note in the README for link).
|
---|
1640 | */
|
---|
1641 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1642 | {
|
---|
1643 | int i;
|
---|
1644 |
|
---|
1645 | /* turn on RNGB module */
|
---|
1646 | SIM_SCGC3 |= SIM_SCGC3_RNGB_MASK;
|
---|
1647 |
|
---|
1648 | /* reset RNGB */
|
---|
1649 | RNG_CMD |= RNG_CMD_SR_MASK;
|
---|
1650 |
|
---|
1651 | /* FIFO generate interrupt, return all zeros on underflow,
|
---|
1652 | * set auto reseed */
|
---|
1653 | RNG_CR |= (RNG_CR_FUFMOD_MASK | RNG_CR_AR_MASK);
|
---|
1654 |
|
---|
1655 | /* gen seed, clear interrupts, clear errors */
|
---|
1656 | RNG_CMD |= (RNG_CMD_GS_MASK | RNG_CMD_CI_MASK | RNG_CMD_CE_MASK);
|
---|
1657 |
|
---|
1658 | /* wait for seeding to complete */
|
---|
1659 | while ((RNG_SR & RNG_SR_SDN_MASK) == 0) {}
|
---|
1660 |
|
---|
1661 | for (i = 0; i < sz; i++) {
|
---|
1662 |
|
---|
1663 | /* wait for a word to be available from FIFO */
|
---|
1664 | while((RNG_SR & RNG_SR_FIFO_LVL_MASK) == 0) {}
|
---|
1665 |
|
---|
1666 | /* get value */
|
---|
1667 | output[i] = RNG_OUT;
|
---|
1668 | }
|
---|
1669 |
|
---|
1670 | return 0;
|
---|
1671 | }
|
---|
1672 |
|
---|
1673 | #elif defined(FREESCALE_KSDK_2_0_TRNG)
|
---|
1674 |
|
---|
1675 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1676 | {
|
---|
1677 | status_t status;
|
---|
1678 | status = TRNG_GetRandomData(TRNG0, output, sz);
|
---|
1679 | if (status == kStatus_Success)
|
---|
1680 | {
|
---|
1681 | return(0);
|
---|
1682 | }
|
---|
1683 | else
|
---|
1684 | {
|
---|
1685 | return RAN_BLOCK_E;
|
---|
1686 | }
|
---|
1687 | }
|
---|
1688 |
|
---|
1689 | #elif defined(FREESCALE_KSDK_2_0_RNGA)
|
---|
1690 |
|
---|
1691 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1692 | {
|
---|
1693 | status_t status;
|
---|
1694 | status = RNGA_GetRandomData(RNG, output, sz);
|
---|
1695 | if (status == kStatus_Success)
|
---|
1696 | {
|
---|
1697 | return(0);
|
---|
1698 | }
|
---|
1699 | else
|
---|
1700 | {
|
---|
1701 | return RAN_BLOCK_E;
|
---|
1702 | }
|
---|
1703 | }
|
---|
1704 |
|
---|
1705 |
|
---|
1706 | #elif defined(FREESCALE_RNGA)
|
---|
1707 |
|
---|
1708 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1709 | {
|
---|
1710 | RNGA_DRV_GetRandomData(RNGA_INSTANCE, output, sz);
|
---|
1711 | return 0;
|
---|
1712 | }
|
---|
1713 |
|
---|
1714 | #else
|
---|
1715 | #define USE_TEST_GENSEED
|
---|
1716 | #endif /* FREESCALE_K70_RNGA */
|
---|
1717 |
|
---|
1718 | #elif defined(STM32_RNG)
|
---|
1719 | /* Generate a RNG seed using the hardware random number generator
|
---|
1720 | * on the STM32F2/F4/F7. */
|
---|
1721 |
|
---|
1722 | #ifdef WOLFSSL_STM32_CUBEMX
|
---|
1723 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1724 | {
|
---|
1725 | RNG_HandleTypeDef hrng;
|
---|
1726 | int i;
|
---|
1727 | (void)os;
|
---|
1728 |
|
---|
1729 | /* enable RNG clock source */
|
---|
1730 | __HAL_RCC_RNG_CLK_ENABLE();
|
---|
1731 |
|
---|
1732 | /* enable RNG peripheral */
|
---|
1733 | hrng.Instance = RNG;
|
---|
1734 | HAL_RNG_Init(&hrng);
|
---|
1735 |
|
---|
1736 | for (i = 0; i < (int)sz; i++) {
|
---|
1737 | /* get value */
|
---|
1738 | output[i] = (byte)HAL_RNG_GetRandomNumber(&hrng);
|
---|
1739 | }
|
---|
1740 |
|
---|
1741 | return 0;
|
---|
1742 | }
|
---|
1743 | #elif defined(WOLFSSL_STM32F427_RNG)
|
---|
1744 |
|
---|
1745 | /* Generate a RNG seed using the hardware RNG on the STM32F427
|
---|
1746 | * directly, following steps outlined in STM32F4 Reference
|
---|
1747 | * Manual (Chapter 24) for STM32F4xx family. */
|
---|
1748 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1749 | {
|
---|
1750 | int i;
|
---|
1751 | (void)os;
|
---|
1752 |
|
---|
1753 | /* enable RNG peripheral clock */
|
---|
1754 | RCC->AHB2ENR |= RCC_AHB2ENR_RNGEN;
|
---|
1755 |
|
---|
1756 | /* enable RNG interrupt, set IE bit in RNG->CR register */
|
---|
1757 | RNG->CR |= RNG_CR_IE;
|
---|
1758 |
|
---|
1759 | /* enable RNG, set RNGEN bit in RNG->CR. Activates RNG,
|
---|
1760 | * RNG_LFSR, and error detector */
|
---|
1761 | RNG->CR |= RNG_CR_RNGEN;
|
---|
1762 |
|
---|
1763 | /* verify no errors, make sure SEIS and CEIS bits are 0
|
---|
1764 | * in RNG->SR register */
|
---|
1765 | if (RNG->SR & (RNG_SR_SECS | RNG_SR_CECS))
|
---|
1766 | return RNG_FAILURE_E;
|
---|
1767 |
|
---|
1768 | for (i = 0; i < (int)sz; i++) {
|
---|
1769 | /* wait until RNG number is ready */
|
---|
1770 | while ((RNG->SR & RNG_SR_DRDY) == 0) { }
|
---|
1771 |
|
---|
1772 | /* get value */
|
---|
1773 | output[i] = RNG->DR;
|
---|
1774 | }
|
---|
1775 |
|
---|
1776 | return 0;
|
---|
1777 | }
|
---|
1778 |
|
---|
1779 | #else
|
---|
1780 |
|
---|
1781 | /* Generate a RNG seed using the STM32 Standard Peripheral Library */
|
---|
1782 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1783 | {
|
---|
1784 | int i;
|
---|
1785 | (void)os;
|
---|
1786 |
|
---|
1787 | /* enable RNG clock source */
|
---|
1788 | RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
|
---|
1789 |
|
---|
1790 | /* reset RNG */
|
---|
1791 | RNG_DeInit();
|
---|
1792 |
|
---|
1793 | /* enable RNG peripheral */
|
---|
1794 | RNG_Cmd(ENABLE);
|
---|
1795 |
|
---|
1796 | /* verify no errors with RNG_CLK or Seed */
|
---|
1797 | if (RNG_GetFlagStatus(RNG_FLAG_SECS | RNG_FLAG_CECS) != RESET)
|
---|
1798 | return RNG_FAILURE_E;
|
---|
1799 |
|
---|
1800 | for (i = 0; i < (int)sz; i++) {
|
---|
1801 | /* wait until RNG number is ready */
|
---|
1802 | while (RNG_GetFlagStatus(RNG_FLAG_DRDY) == RESET) { }
|
---|
1803 |
|
---|
1804 | /* get value */
|
---|
1805 | output[i] = RNG_GetRandomNumber();
|
---|
1806 | }
|
---|
1807 |
|
---|
1808 | return 0;
|
---|
1809 | }
|
---|
1810 | #endif /* WOLFSSL_STM32_CUBEMX */
|
---|
1811 |
|
---|
1812 | #elif defined(WOLFSSL_TIRTOS)
|
---|
1813 |
|
---|
1814 | #include <xdc/runtime/Timestamp.h>
|
---|
1815 | #include <stdlib.h>
|
---|
1816 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1817 | {
|
---|
1818 | int i;
|
---|
1819 | srand(xdc_runtime_Timestamp_get32());
|
---|
1820 |
|
---|
1821 | for (i = 0; i < sz; i++ ) {
|
---|
1822 | output[i] = rand() % 256;
|
---|
1823 | if ((i % 8) == 7) {
|
---|
1824 | srand(xdc_runtime_Timestamp_get32());
|
---|
1825 | }
|
---|
1826 | }
|
---|
1827 |
|
---|
1828 | return 0;
|
---|
1829 | }
|
---|
1830 |
|
---|
1831 | #elif defined(WOLFSSL_PB)
|
---|
1832 |
|
---|
1833 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1834 | {
|
---|
1835 | word32 i;
|
---|
1836 | for (i = 0; i < sz; i++)
|
---|
1837 | output[i] = UTL_Rand();
|
---|
1838 |
|
---|
1839 | (void)os;
|
---|
1840 |
|
---|
1841 | return 0;
|
---|
1842 | }
|
---|
1843 |
|
---|
1844 | #elif defined(WOLFSSL_NUCLEUS)
|
---|
1845 | #include "nucleus.h"
|
---|
1846 | #include "kernel/plus_common.h"
|
---|
1847 |
|
---|
1848 | #warning "potential for not enough entropy, currently being used for testing"
|
---|
1849 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1850 | {
|
---|
1851 | int i;
|
---|
1852 | srand(NU_Get_Time_Stamp());
|
---|
1853 |
|
---|
1854 | for (i = 0; i < sz; i++ ) {
|
---|
1855 | output[i] = rand() % 256;
|
---|
1856 | if ((i % 8) == 7) {
|
---|
1857 | srand(NU_Get_Time_Stamp());
|
---|
1858 | }
|
---|
1859 | }
|
---|
1860 |
|
---|
1861 | return 0;
|
---|
1862 | }
|
---|
1863 | #elif defined(WOLFSSL_VXWORKS)
|
---|
1864 |
|
---|
1865 | #include <randomNumGen.h>
|
---|
1866 |
|
---|
1867 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) {
|
---|
1868 | STATUS status;
|
---|
1869 |
|
---|
1870 | #ifdef VXWORKS_SIM
|
---|
1871 | /* cannot generate true entropy with VxWorks simulator */
|
---|
1872 | #warning "not enough entropy, simulator for testing only"
|
---|
1873 | int i = 0;
|
---|
1874 |
|
---|
1875 | for (i = 0; i < 1000; i++) {
|
---|
1876 | randomAddTimeStamp();
|
---|
1877 | }
|
---|
1878 | #endif
|
---|
1879 |
|
---|
1880 | status = randBytes (output, sz);
|
---|
1881 | if (status == ERROR) {
|
---|
1882 | return RNG_FAILURE_E;
|
---|
1883 | }
|
---|
1884 |
|
---|
1885 | return 0;
|
---|
1886 | }
|
---|
1887 |
|
---|
1888 | #elif defined(WOLFSSL_NRF51)
|
---|
1889 | #include "app_error.h"
|
---|
1890 | #include "nrf_drv_rng.h"
|
---|
1891 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1892 | {
|
---|
1893 | int remaining = sz, length, pos = 0;
|
---|
1894 | uint8_t available;
|
---|
1895 | uint32_t err_code;
|
---|
1896 |
|
---|
1897 | (void)os;
|
---|
1898 |
|
---|
1899 | /* Make sure RNG is running */
|
---|
1900 | err_code = nrf_drv_rng_init(NULL);
|
---|
1901 | if (err_code != NRF_SUCCESS && err_code != NRF_ERROR_INVALID_STATE) {
|
---|
1902 | return -1;
|
---|
1903 | }
|
---|
1904 |
|
---|
1905 | while (remaining > 0) {
|
---|
1906 | err_code = nrf_drv_rng_bytes_available(&available);
|
---|
1907 | if (err_code == NRF_SUCCESS) {
|
---|
1908 | length = (remaining < available) ? remaining : available;
|
---|
1909 | if (length > 0) {
|
---|
1910 | err_code = nrf_drv_rng_rand(&output[pos], length);
|
---|
1911 | remaining -= length;
|
---|
1912 | pos += length;
|
---|
1913 | }
|
---|
1914 | }
|
---|
1915 |
|
---|
1916 | if (err_code != NRF_SUCCESS) {
|
---|
1917 | break;
|
---|
1918 | }
|
---|
1919 | }
|
---|
1920 |
|
---|
1921 | return (err_code == NRF_SUCCESS) ? 0 : -1;
|
---|
1922 | }
|
---|
1923 |
|
---|
1924 | #elif defined(HAVE_WNR)
|
---|
1925 |
|
---|
1926 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1927 | {
|
---|
1928 | if (os == NULL || output == NULL || wnr_ctx == NULL ||
|
---|
1929 | wnr_timeout < 0) {
|
---|
1930 | return BAD_FUNC_ARG;
|
---|
1931 | }
|
---|
1932 |
|
---|
1933 | if (wnr_mutex_init == 0) {
|
---|
1934 | WOLFSSL_MSG("netRandom context must be created before use");
|
---|
1935 | return RNG_FAILURE_E;
|
---|
1936 | }
|
---|
1937 |
|
---|
1938 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
1939 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex\n");
|
---|
1940 | return BAD_MUTEX_E;
|
---|
1941 | }
|
---|
1942 |
|
---|
1943 | if (wnr_get_entropy(wnr_ctx, wnr_timeout, output, sz, sz) !=
|
---|
1944 | WNR_ERROR_NONE)
|
---|
1945 | return RNG_FAILURE_E;
|
---|
1946 |
|
---|
1947 | wc_UnLockMutex(&wnr_mutex);
|
---|
1948 |
|
---|
1949 | return 0;
|
---|
1950 | }
|
---|
1951 |
|
---|
1952 | #elif defined(WOLFSSL_ATMEL)
|
---|
1953 | #include <wolfssl/wolfcrypt/port/atmel/atmel.h>
|
---|
1954 |
|
---|
1955 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1956 | {
|
---|
1957 | int ret = 0;
|
---|
1958 |
|
---|
1959 | (void)os;
|
---|
1960 | if (output == NULL) {
|
---|
1961 | return BUFFER_E;
|
---|
1962 | }
|
---|
1963 |
|
---|
1964 | ret = atmel_get_random_number(sz, output);
|
---|
1965 |
|
---|
1966 | return ret;
|
---|
1967 | }
|
---|
1968 |
|
---|
1969 | #elif defined(INTIME_RTOS)
|
---|
1970 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1971 | {
|
---|
1972 | int ret = 0;
|
---|
1973 |
|
---|
1974 | (void)os;
|
---|
1975 |
|
---|
1976 | if (output == NULL) {
|
---|
1977 | return BUFFER_E;
|
---|
1978 | }
|
---|
1979 |
|
---|
1980 | /* Note: Investigate better solution */
|
---|
1981 | /* no return to check */
|
---|
1982 | arc4random_buf(output, sz);
|
---|
1983 |
|
---|
1984 | return ret;
|
---|
1985 | }
|
---|
1986 |
|
---|
1987 | #elif defined(IDIRECT_DEV_RANDOM)
|
---|
1988 |
|
---|
1989 | extern int getRandom( int sz, unsigned char *output );
|
---|
1990 |
|
---|
1991 | int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1992 | {
|
---|
1993 | int num_bytes_returned = 0;
|
---|
1994 |
|
---|
1995 | num_bytes_returned = getRandom( (int) sz, (unsigned char *) output );
|
---|
1996 |
|
---|
1997 | return 0;
|
---|
1998 | }
|
---|
1999 |
|
---|
2000 | #elif (defined(WOLFSSL_IMX6_CAAM) || defined(WOLFSSL_IMX6_CAAM_RNG))
|
---|
2001 |
|
---|
2002 | #include <wolfssl/wolfcrypt/port/caam/wolfcaam.h>
|
---|
2003 | #include <wolfssl/wolfcrypt/port/caam/caam_driver.h>
|
---|
2004 |
|
---|
2005 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
2006 | {
|
---|
2007 | Buffer buf[1];
|
---|
2008 | int ret = 0;
|
---|
2009 | int times = 1000, i;
|
---|
2010 |
|
---|
2011 | (void)os;
|
---|
2012 |
|
---|
2013 | if (output == NULL) {
|
---|
2014 | return BUFFER_E;
|
---|
2015 | }
|
---|
2016 |
|
---|
2017 | buf[0].BufferType = DataBuffer | LastBuffer;
|
---|
2018 | buf[0].TheAddress = (Address)output;
|
---|
2019 | buf[0].Length = sz;
|
---|
2020 |
|
---|
2021 | /* Check Waiting to make sure entropy is ready */
|
---|
2022 | for (i = 0; i < times; i++) {
|
---|
2023 | ret = wc_caamAddAndWait(buf, NULL, CAAM_ENTROPY);
|
---|
2024 | if (ret == Success) {
|
---|
2025 | break;
|
---|
2026 | }
|
---|
2027 |
|
---|
2028 | /* driver could be waiting for entropy */
|
---|
2029 | if (ret != RAN_BLOCK_E) {
|
---|
2030 | return ret;
|
---|
2031 | }
|
---|
2032 | usleep(100);
|
---|
2033 | }
|
---|
2034 |
|
---|
2035 | if (i == times && ret != Success) {
|
---|
2036 | return RNG_FAILURE_E;
|
---|
2037 | }
|
---|
2038 | else { /* Success case */
|
---|
2039 | ret = 0;
|
---|
2040 | }
|
---|
2041 |
|
---|
2042 | return ret;
|
---|
2043 | }
|
---|
2044 |
|
---|
2045 | #elif defined(WOLFSSL_APACHE_MYNEWT)
|
---|
2046 |
|
---|
2047 | #include <stdlib.h>
|
---|
2048 | #include "os/os_time.h"
|
---|
2049 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
2050 | {
|
---|
2051 | int i;
|
---|
2052 | srand(os_time_get());
|
---|
2053 |
|
---|
2054 | for (i = 0; i < sz; i++ ) {
|
---|
2055 | output[i] = rand() % 256;
|
---|
2056 | if ((i % 8) == 7) {
|
---|
2057 | srand(os_time_get());
|
---|
2058 | }
|
---|
2059 | }
|
---|
2060 |
|
---|
2061 | return 0;
|
---|
2062 | }
|
---|
2063 |
|
---|
2064 | #elif defined(WOLFSSL_ESPIDF)
|
---|
2065 | #if defined(WOLFSSL_ESPWROOM32)
|
---|
2066 | #include <esp_system.h>
|
---|
2067 |
|
---|
2068 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
2069 | {
|
---|
2070 | int i;
|
---|
2071 |
|
---|
2072 | for (i = 0; i< sz; i++) {
|
---|
2073 | output[i] = esp_random( );
|
---|
2074 | }
|
---|
2075 |
|
---|
2076 | return 0;
|
---|
2077 | }
|
---|
2078 | #endif /* end WOLFSSL_ESPWROOM32 */
|
---|
2079 |
|
---|
2080 | #elif defined(CUSTOM_RAND_GENERATE_BLOCK)
|
---|
2081 | /* #define CUSTOM_RAND_GENERATE_BLOCK myRngFunc
|
---|
2082 | * extern int myRngFunc(byte* output, word32 sz);
|
---|
2083 | */
|
---|
2084 |
|
---|
2085 | #elif defined(WOLFSSL_SAFERTOS) || defined(WOLFSSL_LEANPSK) || \
|
---|
2086 | defined(WOLFSSL_IAR_ARM) || defined(WOLFSSL_MDK_ARM) || \
|
---|
2087 | defined(WOLFSSL_uITRON4) || defined(WOLFSSL_uTKERNEL2) || \
|
---|
2088 | defined(WOLFSSL_LPC43xx) || defined(WOLFSSL_STM32F2xx) || \
|
---|
2089 | defined(MBED) || defined(WOLFSSL_EMBOS) || \
|
---|
2090 | defined(WOLFSSL_GENSEED_FORTEST) || defined(WOLFSSL_CHIBIOS) || \
|
---|
2091 | defined(WOLFSSL_CONTIKI)
|
---|
2092 |
|
---|
2093 | /* these platforms do not have a default random seed and
|
---|
2094 | you'll need to implement your own wc_GenerateSeed or define via
|
---|
2095 | CUSTOM_RAND_GENERATE_BLOCK */
|
---|
2096 |
|
---|
2097 | #define USE_TEST_GENSEED
|
---|
2098 |
|
---|
2099 | #elif defined(NO_DEV_RANDOM)
|
---|
2100 |
|
---|
2101 | #error "you need to write an os specific wc_GenerateSeed() here"
|
---|
2102 |
|
---|
2103 | /*
|
---|
2104 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
2105 | {
|
---|
2106 | return 0;
|
---|
2107 | }
|
---|
2108 | */
|
---|
2109 |
|
---|
2110 | #else
|
---|
2111 |
|
---|
2112 | /* may block */
|
---|
2113 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
2114 | {
|
---|
2115 | int ret = 0;
|
---|
2116 |
|
---|
2117 | #ifdef HAVE_INTEL_RDSEED
|
---|
2118 | if (IS_INTEL_RDSEED(intel_flags)) {
|
---|
2119 | ret = wc_GenerateSeed_IntelRD(NULL, output, sz);
|
---|
2120 | if (ret == 0) {
|
---|
2121 | /* success, we're done */
|
---|
2122 | return ret;
|
---|
2123 | }
|
---|
2124 | #ifdef FORCE_FAILURE_RDSEED
|
---|
2125 | /* don't fallback to /dev/urandom */
|
---|
2126 | return ret;
|
---|
2127 | #else
|
---|
2128 | /* reset error and fallback to using /dev/urandom */
|
---|
2129 | ret = 0;
|
---|
2130 | #endif
|
---|
2131 | }
|
---|
2132 | #endif /* HAVE_INTEL_RDSEED */
|
---|
2133 |
|
---|
2134 | #ifndef NO_DEV_URANDOM /* way to disable use of /dev/urandom */
|
---|
2135 | os->fd = open("/dev/urandom",O_RDONLY);
|
---|
2136 | if (os->fd == -1)
|
---|
2137 | #endif
|
---|
2138 | {
|
---|
2139 | /* may still have /dev/random */
|
---|
2140 | os->fd = open("/dev/random",O_RDONLY);
|
---|
2141 | if (os->fd == -1)
|
---|
2142 | return OPEN_RAN_E;
|
---|
2143 | }
|
---|
2144 |
|
---|
2145 | while (sz) {
|
---|
2146 | int len = (int)read(os->fd, output, sz);
|
---|
2147 | if (len == -1) {
|
---|
2148 | ret = READ_RAN_E;
|
---|
2149 | break;
|
---|
2150 | }
|
---|
2151 |
|
---|
2152 | sz -= len;
|
---|
2153 | output += len;
|
---|
2154 |
|
---|
2155 | if (sz) {
|
---|
2156 | #if defined(BLOCKING) || defined(WC_RNG_BLOCKING)
|
---|
2157 | sleep(0); /* context switch */
|
---|
2158 | #else
|
---|
2159 | ret = RAN_BLOCK_E;
|
---|
2160 | break;
|
---|
2161 | #endif
|
---|
2162 | }
|
---|
2163 | }
|
---|
2164 | close(os->fd);
|
---|
2165 |
|
---|
2166 | return ret;
|
---|
2167 | }
|
---|
2168 |
|
---|
2169 | #endif
|
---|
2170 |
|
---|
2171 | #ifdef USE_TEST_GENSEED
|
---|
2172 | #ifndef _MSC_VER
|
---|
2173 | #warning "write a real random seed!!!!, just for testing now"
|
---|
2174 | #else
|
---|
2175 | #pragma message("Warning: write a real random seed!!!!, just for testing now")
|
---|
2176 | #endif
|
---|
2177 |
|
---|
2178 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
2179 | {
|
---|
2180 | word32 i;
|
---|
2181 | for (i = 0; i < sz; i++ )
|
---|
2182 | output[i] = i;
|
---|
2183 |
|
---|
2184 | (void)os;
|
---|
2185 |
|
---|
2186 | return 0;
|
---|
2187 | }
|
---|
2188 | #endif
|
---|
2189 |
|
---|
2190 | /* End wc_GenerateSeed */
|
---|
2191 | #endif /* WC_NO_RNG */
|
---|
2192 | #endif /* HAVE_FIPS */
|
---|