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 |
|
---|
29 | /* on HPUX 11 you may need to install /dev/random see
|
---|
30 | http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I
|
---|
31 |
|
---|
32 | */
|
---|
33 |
|
---|
34 | #include <wolfssl/wolfcrypt/random.h>
|
---|
35 | #include <wolfssl/wolfcrypt/cpuid.h>
|
---|
36 |
|
---|
37 |
|
---|
38 | #ifdef HAVE_FIPS
|
---|
39 | int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz)
|
---|
40 | {
|
---|
41 | return GenerateSeed(os, seed, sz);
|
---|
42 | }
|
---|
43 |
|
---|
44 | int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId)
|
---|
45 | {
|
---|
46 | (void)heap;
|
---|
47 | (void)devId;
|
---|
48 | return InitRng_fips(rng);
|
---|
49 | }
|
---|
50 |
|
---|
51 | int wc_InitRng(WC_RNG* rng)
|
---|
52 | {
|
---|
53 | return InitRng_fips(rng);
|
---|
54 | }
|
---|
55 |
|
---|
56 |
|
---|
57 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* b, word32 sz)
|
---|
58 | {
|
---|
59 | return RNG_GenerateBlock_fips(rng, b, sz);
|
---|
60 | }
|
---|
61 |
|
---|
62 |
|
---|
63 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
64 | {
|
---|
65 | return RNG_GenerateByte(rng, b);
|
---|
66 | }
|
---|
67 |
|
---|
68 | #ifdef HAVE_HASHDRBG
|
---|
69 |
|
---|
70 | int wc_FreeRng(WC_RNG* rng)
|
---|
71 | {
|
---|
72 | return FreeRng_fips(rng);
|
---|
73 | }
|
---|
74 |
|
---|
75 | int wc_RNG_HealthTest(int reseed,
|
---|
76 | const byte* entropyA, word32 entropyASz,
|
---|
77 | const byte* entropyB, word32 entropyBSz,
|
---|
78 | byte* output, word32 outputSz)
|
---|
79 | {
|
---|
80 | return RNG_HealthTest_fips(reseed, entropyA, entropyASz,
|
---|
81 | entropyB, entropyBSz, output, outputSz);
|
---|
82 | }
|
---|
83 | #endif /* HAVE_HASHDRBG */
|
---|
84 |
|
---|
85 | #else /* else build without fips */
|
---|
86 |
|
---|
87 | #ifndef WC_NO_RNG /* if not FIPS and RNG is disabled then do not compile */
|
---|
88 |
|
---|
89 | #include <wolfssl/wolfcrypt/error-crypt.h>
|
---|
90 | #include <wolfssl/wolfcrypt/sha256.h>
|
---|
91 |
|
---|
92 | #ifdef NO_INLINE
|
---|
93 | #include <wolfssl/wolfcrypt/misc.h>
|
---|
94 | #else
|
---|
95 | #define WOLFSSL_MISC_INCLUDED
|
---|
96 | #include <wolfcrypt/src/misc.c>
|
---|
97 | #endif
|
---|
98 |
|
---|
99 | #if defined(WOLFSSL_SGX)
|
---|
100 | #include <sgx_trts.h>
|
---|
101 | #elif defined(USE_WINDOWS_API)
|
---|
102 | #ifndef _WIN32_WINNT
|
---|
103 | #define _WIN32_WINNT 0x0400
|
---|
104 | #endif
|
---|
105 | #include <windows.h>
|
---|
106 | #include <wincrypt.h>
|
---|
107 | #elif defined(HAVE_WNR)
|
---|
108 | #include <wnr.h>
|
---|
109 | #include <wolfssl/wolfcrypt/logging.h>
|
---|
110 | wolfSSL_Mutex wnr_mutex; /* global netRandom mutex */
|
---|
111 | int wnr_timeout = 0; /* entropy timeout, mililseconds */
|
---|
112 | int wnr_mutex_init = 0; /* flag for mutex init */
|
---|
113 | wnr_context* wnr_ctx; /* global netRandom context */
|
---|
114 | #elif defined(FREESCALE_KSDK_2_0_TRNG)
|
---|
115 | #include "fsl_trng.h"
|
---|
116 | #elif defined(FREESCALE_KSDK_2_0_RNGA)
|
---|
117 | #include "fsl_rnga.h"
|
---|
118 |
|
---|
119 | #elif defined(NO_DEV_RANDOM)
|
---|
120 | #elif defined(CUSTOM_RAND_GENERATE)
|
---|
121 | #elif defined(CUSTOM_RAND_GENERATE_BLOCK)
|
---|
122 | #elif defined(CUSTOM_RAND_GENERATE_SEED)
|
---|
123 | #elif defined(WOLFSSL_GENSEED_FORTEST)
|
---|
124 | #elif defined(WOLFSSL_MDK_ARM)
|
---|
125 | #elif defined(WOLFSSL_IAR_ARM)
|
---|
126 | #elif defined(WOLFSSL_ROWLEY_ARM)
|
---|
127 | #elif defined(WOLFSSL_EMBOS)
|
---|
128 | #elif defined(MICRIUM)
|
---|
129 | #else
|
---|
130 | /* include headers that may be needed to get good seed */
|
---|
131 | #include <fcntl.h>
|
---|
132 | #ifndef EBSNET
|
---|
133 | #include <unistd.h>
|
---|
134 | #endif
|
---|
135 | #endif
|
---|
136 |
|
---|
137 |
|
---|
138 | #if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED)
|
---|
139 | static word32 intel_flags = 0;
|
---|
140 | static void wc_InitRng_IntelRD(void)
|
---|
141 | {
|
---|
142 | intel_flags = cpuid_get_flags();
|
---|
143 | }
|
---|
144 | #ifdef HAVE_INTEL_RDSEED
|
---|
145 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz);
|
---|
146 | #endif
|
---|
147 | #ifdef HAVE_INTEL_RDRAND
|
---|
148 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz);
|
---|
149 | #endif
|
---|
150 | #endif
|
---|
151 |
|
---|
152 | /* Start NIST DRBG code */
|
---|
153 | #ifdef HAVE_HASHDRBG
|
---|
154 |
|
---|
155 | #define OUTPUT_BLOCK_LEN (WC_SHA256_DIGEST_SIZE)
|
---|
156 | #define MAX_REQUEST_LEN (0x10000)
|
---|
157 | #define RESEED_INTERVAL WC_RESEED_INTERVAL
|
---|
158 | #define SECURITY_STRENGTH (256)
|
---|
159 | #define ENTROPY_SZ (SECURITY_STRENGTH/8)
|
---|
160 | #define NONCE_SZ (ENTROPY_SZ/2)
|
---|
161 | #define ENTROPY_NONCE_SZ (ENTROPY_SZ+NONCE_SZ)
|
---|
162 |
|
---|
163 | /* Internal return codes */
|
---|
164 | #define DRBG_SUCCESS 0
|
---|
165 | #define DRBG_ERROR 1
|
---|
166 | #define DRBG_FAILURE 2
|
---|
167 | #define DRBG_NEED_RESEED 3
|
---|
168 | #define DRBG_CONT_FAILURE 4
|
---|
169 |
|
---|
170 | /* RNG health states */
|
---|
171 | #define DRBG_NOT_INIT 0
|
---|
172 | #define DRBG_OK 1
|
---|
173 | #define DRBG_FAILED 2
|
---|
174 | #define DRBG_CONT_FAILED 3
|
---|
175 |
|
---|
176 | #define RNG_HEALTH_TEST_CHECK_SIZE (WC_SHA256_DIGEST_SIZE * 4)
|
---|
177 |
|
---|
178 | /* Verify max gen block len */
|
---|
179 | #if RNG_MAX_BLOCK_LEN > MAX_REQUEST_LEN
|
---|
180 | #error RNG_MAX_BLOCK_LEN is larger than NIST DBRG max request length
|
---|
181 | #endif
|
---|
182 |
|
---|
183 | enum {
|
---|
184 | drbgInitC = 0,
|
---|
185 | drbgReseed = 1,
|
---|
186 | drbgGenerateW = 2,
|
---|
187 | drbgGenerateH = 3,
|
---|
188 | drbgInitV
|
---|
189 | };
|
---|
190 |
|
---|
191 |
|
---|
192 | typedef struct DRBG {
|
---|
193 | word32 reseedCtr;
|
---|
194 | word32 lastBlock;
|
---|
195 | byte V[DRBG_SEED_LEN];
|
---|
196 | byte C[DRBG_SEED_LEN];
|
---|
197 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
198 | void* heap;
|
---|
199 | int devId;
|
---|
200 | #endif
|
---|
201 | byte matchCount;
|
---|
202 | } DRBG;
|
---|
203 |
|
---|
204 |
|
---|
205 | static int wc_RNG_HealthTestLocal(int reseed);
|
---|
206 |
|
---|
207 | /* Hash Derivation Function */
|
---|
208 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
209 | static int Hash_df(DRBG* drbg, byte* out, word32 outSz, byte type,
|
---|
210 | const byte* inA, word32 inASz,
|
---|
211 | const byte* inB, word32 inBSz)
|
---|
212 | {
|
---|
213 | int ret = DRBG_FAILURE;
|
---|
214 | byte ctr;
|
---|
215 | int i;
|
---|
216 | int len;
|
---|
217 | word32 bits = (outSz * 8); /* reverse byte order */
|
---|
218 | wc_Sha256 sha;
|
---|
219 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
220 |
|
---|
221 | (void)drbg;
|
---|
222 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
223 | if (digest == NULL)
|
---|
224 | return DRBG_FAILURE;
|
---|
225 | #endif
|
---|
226 |
|
---|
227 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
228 | bits = ByteReverseWord32(bits);
|
---|
229 | #endif
|
---|
230 | len = (outSz / OUTPUT_BLOCK_LEN)
|
---|
231 | + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
|
---|
232 |
|
---|
233 | for (i = 0, ctr = 1; i < len; i++, ctr++) {
|
---|
234 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
235 | ret = wc_InitSha256_ex(&sha, drbg->heap, drbg->devId);
|
---|
236 | #else
|
---|
237 | ret = wc_InitSha256(&sha);
|
---|
238 | #endif
|
---|
239 | if (ret != 0)
|
---|
240 | break;
|
---|
241 |
|
---|
242 | if (ret == 0)
|
---|
243 | ret = wc_Sha256Update(&sha, &ctr, sizeof(ctr));
|
---|
244 | if (ret == 0)
|
---|
245 | ret = wc_Sha256Update(&sha, (byte*)&bits, sizeof(bits));
|
---|
246 |
|
---|
247 | if (ret == 0) {
|
---|
248 | /* churning V is the only string that doesn't have the type added */
|
---|
249 | if (type != drbgInitV)
|
---|
250 | ret = wc_Sha256Update(&sha, &type, sizeof(type));
|
---|
251 | }
|
---|
252 | if (ret == 0)
|
---|
253 | ret = wc_Sha256Update(&sha, inA, inASz);
|
---|
254 | if (ret == 0) {
|
---|
255 | if (inB != NULL && inBSz > 0)
|
---|
256 | ret = wc_Sha256Update(&sha, inB, inBSz);
|
---|
257 | }
|
---|
258 | if (ret == 0)
|
---|
259 | ret = wc_Sha256Final(&sha, digest);
|
---|
260 |
|
---|
261 | wc_Sha256Free(&sha);
|
---|
262 | if (ret == 0) {
|
---|
263 | if (outSz > OUTPUT_BLOCK_LEN) {
|
---|
264 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
|
---|
265 | outSz -= OUTPUT_BLOCK_LEN;
|
---|
266 | out += OUTPUT_BLOCK_LEN;
|
---|
267 | }
|
---|
268 | else {
|
---|
269 | XMEMCPY(out, digest, outSz);
|
---|
270 | }
|
---|
271 | }
|
---|
272 | }
|
---|
273 |
|
---|
274 | ForceZero(digest, WC_SHA256_DIGEST_SIZE);
|
---|
275 |
|
---|
276 | FREE_VAR(digest, drbg->heap);
|
---|
277 |
|
---|
278 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
279 | }
|
---|
280 |
|
---|
281 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
282 | static int Hash_DRBG_Reseed(DRBG* drbg, const byte* entropy, word32 entropySz)
|
---|
283 | {
|
---|
284 | byte seed[DRBG_SEED_LEN];
|
---|
285 |
|
---|
286 | if (Hash_df(drbg, seed, sizeof(seed), drbgReseed, drbg->V, sizeof(drbg->V),
|
---|
287 | entropy, entropySz) != DRBG_SUCCESS) {
|
---|
288 | return DRBG_FAILURE;
|
---|
289 | }
|
---|
290 |
|
---|
291 | XMEMCPY(drbg->V, seed, sizeof(drbg->V));
|
---|
292 | ForceZero(seed, sizeof(seed));
|
---|
293 |
|
---|
294 | if (Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
295 | sizeof(drbg->V), NULL, 0) != DRBG_SUCCESS) {
|
---|
296 | return DRBG_FAILURE;
|
---|
297 | }
|
---|
298 |
|
---|
299 | drbg->reseedCtr = 1;
|
---|
300 | drbg->lastBlock = 0;
|
---|
301 | drbg->matchCount = 0;
|
---|
302 | return DRBG_SUCCESS;
|
---|
303 | }
|
---|
304 |
|
---|
305 | static INLINE void array_add_one(byte* data, word32 dataSz)
|
---|
306 | {
|
---|
307 | int i;
|
---|
308 |
|
---|
309 | for (i = dataSz - 1; i >= 0; i--)
|
---|
310 | {
|
---|
311 | data[i]++;
|
---|
312 | if (data[i] != 0) break;
|
---|
313 | }
|
---|
314 | }
|
---|
315 |
|
---|
316 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
317 | static int Hash_gen(DRBG* drbg, byte* out, word32 outSz, const byte* V)
|
---|
318 | {
|
---|
319 | int ret = DRBG_FAILURE;
|
---|
320 | byte data[DRBG_SEED_LEN];
|
---|
321 | int i;
|
---|
322 | int len;
|
---|
323 | word32 checkBlock;
|
---|
324 | wc_Sha256 sha;
|
---|
325 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
326 |
|
---|
327 | /* Special case: outSz is 0 and out is NULL. wc_Generate a block to save for
|
---|
328 | * the continuous test. */
|
---|
329 |
|
---|
330 | if (outSz == 0) outSz = 1;
|
---|
331 |
|
---|
332 | len = (outSz / OUTPUT_BLOCK_LEN) + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
|
---|
333 |
|
---|
334 | XMEMCPY(data, V, sizeof(data));
|
---|
335 | for (i = 0; i < len; i++) {
|
---|
336 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
337 | ret = wc_InitSha256_ex(&sha, drbg->heap, drbg->devId);
|
---|
338 | #else
|
---|
339 | ret = wc_InitSha256(&sha);
|
---|
340 | #endif
|
---|
341 | if (ret == 0)
|
---|
342 | ret = wc_Sha256Update(&sha, data, sizeof(data));
|
---|
343 | if (ret == 0)
|
---|
344 | ret = wc_Sha256Final(&sha, digest);
|
---|
345 | wc_Sha256Free(&sha);
|
---|
346 |
|
---|
347 | if (ret == 0) {
|
---|
348 | XMEMCPY(&checkBlock, digest, sizeof(word32));
|
---|
349 | if (drbg->reseedCtr > 1 && checkBlock == drbg->lastBlock) {
|
---|
350 | if (drbg->matchCount == 1) {
|
---|
351 | return DRBG_CONT_FAILURE;
|
---|
352 | }
|
---|
353 | else {
|
---|
354 | if (i == len) {
|
---|
355 | len++;
|
---|
356 | }
|
---|
357 | drbg->matchCount = 1;
|
---|
358 | }
|
---|
359 | }
|
---|
360 | else {
|
---|
361 | drbg->matchCount = 0;
|
---|
362 | drbg->lastBlock = checkBlock;
|
---|
363 | }
|
---|
364 |
|
---|
365 | if (out != NULL && outSz != 0) {
|
---|
366 | if (outSz >= OUTPUT_BLOCK_LEN) {
|
---|
367 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
|
---|
368 | outSz -= OUTPUT_BLOCK_LEN;
|
---|
369 | out += OUTPUT_BLOCK_LEN;
|
---|
370 | array_add_one(data, DRBG_SEED_LEN);
|
---|
371 | }
|
---|
372 | else {
|
---|
373 | XMEMCPY(out, digest, outSz);
|
---|
374 | outSz = 0;
|
---|
375 | }
|
---|
376 | }
|
---|
377 | }
|
---|
378 | }
|
---|
379 | ForceZero(data, sizeof(data));
|
---|
380 |
|
---|
381 | FREE_VAR(digest, drbg->heap);
|
---|
382 |
|
---|
383 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
384 | }
|
---|
385 |
|
---|
386 | static INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen)
|
---|
387 | {
|
---|
388 | word16 carry = 0;
|
---|
389 |
|
---|
390 | if (dLen > 0 && sLen > 0 && dLen >= sLen) {
|
---|
391 | int sIdx, dIdx;
|
---|
392 |
|
---|
393 | for (sIdx = sLen - 1, dIdx = dLen - 1; sIdx >= 0; dIdx--, sIdx--)
|
---|
394 | {
|
---|
395 | carry += d[dIdx] + s[sIdx];
|
---|
396 | d[dIdx] = (byte)carry;
|
---|
397 | carry >>= 8;
|
---|
398 | }
|
---|
399 |
|
---|
400 | for (; carry != 0 && dIdx >= 0; dIdx--) {
|
---|
401 | carry += d[dIdx];
|
---|
402 | d[dIdx] = (byte)carry;
|
---|
403 | carry >>= 8;
|
---|
404 | }
|
---|
405 | }
|
---|
406 | }
|
---|
407 |
|
---|
408 | /* Returns: DRBG_SUCCESS, DRBG_NEED_RESEED, or DRBG_FAILURE */
|
---|
409 | static int Hash_DRBG_Generate(DRBG* drbg, byte* out, word32 outSz)
|
---|
410 | {
|
---|
411 | int ret;
|
---|
412 | wc_Sha256 sha;
|
---|
413 | byte type;
|
---|
414 | word32 reseedCtr;
|
---|
415 |
|
---|
416 | if (drbg->reseedCtr == RESEED_INTERVAL) {
|
---|
417 | return DRBG_NEED_RESEED;
|
---|
418 | } else {
|
---|
419 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
420 | type = drbgGenerateH;
|
---|
421 | reseedCtr = drbg->reseedCtr;
|
---|
422 |
|
---|
423 | ret = Hash_gen(drbg, out, outSz, drbg->V);
|
---|
424 | if (ret == DRBG_SUCCESS) {
|
---|
425 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
426 | ret = wc_InitSha256_ex(&sha, drbg->heap, drbg->devId);
|
---|
427 | #else
|
---|
428 | ret = wc_InitSha256(&sha);
|
---|
429 | #endif
|
---|
430 | if (ret == 0)
|
---|
431 | ret = wc_Sha256Update(&sha, &type, sizeof(type));
|
---|
432 | if (ret == 0)
|
---|
433 | ret = wc_Sha256Update(&sha, drbg->V, sizeof(drbg->V));
|
---|
434 | if (ret == 0)
|
---|
435 | ret = wc_Sha256Final(&sha, digest);
|
---|
436 |
|
---|
437 | wc_Sha256Free(&sha);
|
---|
438 |
|
---|
439 | if (ret == 0) {
|
---|
440 | array_add(drbg->V, sizeof(drbg->V), digest, WC_SHA256_DIGEST_SIZE);
|
---|
441 | array_add(drbg->V, sizeof(drbg->V), drbg->C, sizeof(drbg->C));
|
---|
442 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
443 | reseedCtr = ByteReverseWord32(reseedCtr);
|
---|
444 | #endif
|
---|
445 | array_add(drbg->V, sizeof(drbg->V),
|
---|
446 | (byte*)&reseedCtr, sizeof(reseedCtr));
|
---|
447 | ret = DRBG_SUCCESS;
|
---|
448 | }
|
---|
449 | drbg->reseedCtr++;
|
---|
450 | }
|
---|
451 | ForceZero(digest, WC_SHA256_DIGEST_SIZE);
|
---|
452 | FREE_VAR(digest, drbg->heap);
|
---|
453 | }
|
---|
454 |
|
---|
455 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
456 | }
|
---|
457 |
|
---|
458 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
459 | static int Hash_DRBG_Instantiate(DRBG* drbg, const byte* seed, word32 seedSz,
|
---|
460 | const byte* nonce, word32 nonceSz,
|
---|
461 | void* heap, int devId)
|
---|
462 | {
|
---|
463 | int ret = DRBG_FAILURE;
|
---|
464 |
|
---|
465 | XMEMSET(drbg, 0, sizeof(DRBG));
|
---|
466 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
467 | drbg->heap = heap;
|
---|
468 | drbg->devId = devId;
|
---|
469 | #else
|
---|
470 | (void)heap;
|
---|
471 | (void)devId;
|
---|
472 | #endif
|
---|
473 |
|
---|
474 | if (Hash_df(drbg, drbg->V, sizeof(drbg->V), drbgInitV, seed, seedSz,
|
---|
475 | nonce, nonceSz) == DRBG_SUCCESS &&
|
---|
476 | Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
477 | sizeof(drbg->V), NULL, 0) == DRBG_SUCCESS) {
|
---|
478 |
|
---|
479 | drbg->reseedCtr = 1;
|
---|
480 | drbg->lastBlock = 0;
|
---|
481 | drbg->matchCount = 0;
|
---|
482 | ret = DRBG_SUCCESS;
|
---|
483 | }
|
---|
484 |
|
---|
485 | return ret;
|
---|
486 | }
|
---|
487 |
|
---|
488 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
489 | static int Hash_DRBG_Uninstantiate(DRBG* drbg)
|
---|
490 | {
|
---|
491 | word32 i;
|
---|
492 | int compareSum = 0;
|
---|
493 | byte* compareDrbg = (byte*)drbg;
|
---|
494 |
|
---|
495 | ForceZero(drbg, sizeof(DRBG));
|
---|
496 |
|
---|
497 | for (i = 0; i < sizeof(DRBG); i++)
|
---|
498 | compareSum |= compareDrbg[i] ^ 0;
|
---|
499 |
|
---|
500 | return (compareSum == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
501 | }
|
---|
502 | #endif /* HAVE_HASHDRBG */
|
---|
503 | /* End NIST DRBG Code */
|
---|
504 |
|
---|
505 |
|
---|
506 | int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId)
|
---|
507 | {
|
---|
508 | int ret = RNG_FAILURE_E;
|
---|
509 |
|
---|
510 | if (rng == NULL)
|
---|
511 | return BAD_FUNC_ARG;
|
---|
512 |
|
---|
513 | #ifdef WOLFSSL_HEAP_TEST
|
---|
514 | rng->heap = (void*)WOLFSSL_HEAP_TEST;
|
---|
515 | (void)heap;
|
---|
516 | #else
|
---|
517 | rng->heap = heap;
|
---|
518 | #endif
|
---|
519 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
520 | rng->devId = devId;
|
---|
521 | #else
|
---|
522 | (void)devId;
|
---|
523 | #endif
|
---|
524 |
|
---|
525 | #ifdef HAVE_HASHDRBG
|
---|
526 | /* init the DBRG to known values */
|
---|
527 | rng->drbg = NULL;
|
---|
528 | rng->status = DRBG_NOT_INIT;
|
---|
529 | #endif
|
---|
530 |
|
---|
531 | #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
|
---|
532 | /* init the intel RD seed and/or rand */
|
---|
533 | wc_InitRng_IntelRD();
|
---|
534 | #endif
|
---|
535 |
|
---|
536 | /* configure async RNG source if available */
|
---|
537 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
538 | ret = wolfAsync_DevCtxInit(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG,
|
---|
539 | rng->heap, rng->devId);
|
---|
540 | if (ret != 0)
|
---|
541 | return ret;
|
---|
542 | #endif
|
---|
543 |
|
---|
544 | #ifdef HAVE_INTEL_RDRAND
|
---|
545 | /* if CPU supports RDRAND, use it directly and by-pass DRBG init */
|
---|
546 | if (IS_INTEL_RDRAND(intel_flags))
|
---|
547 | return 0;
|
---|
548 | #endif
|
---|
549 |
|
---|
550 | #ifdef CUSTOM_RAND_GENERATE_BLOCK
|
---|
551 | ret = 0; /* success */
|
---|
552 | #else
|
---|
553 | #ifdef HAVE_HASHDRBG
|
---|
554 | if (wc_RNG_HealthTestLocal(0) == 0) {
|
---|
555 | DECLARE_VAR(entropy, byte, ENTROPY_NONCE_SZ, rng->heap);
|
---|
556 |
|
---|
557 | rng->drbg =
|
---|
558 | (struct DRBG*)XMALLOC(sizeof(DRBG), rng->heap,
|
---|
559 | DYNAMIC_TYPE_RNG);
|
---|
560 | if (rng->drbg == NULL) {
|
---|
561 | ret = MEMORY_E;
|
---|
562 | }
|
---|
563 | /* This doesn't use a separate nonce. The entropy input will be
|
---|
564 | * the default size plus the size of the nonce making the seed
|
---|
565 | * size. */
|
---|
566 | else if (wc_GenerateSeed(&rng->seed, entropy, ENTROPY_NONCE_SZ) == 0 &&
|
---|
567 | Hash_DRBG_Instantiate(rng->drbg, entropy, ENTROPY_NONCE_SZ,
|
---|
568 | NULL, 0, rng->heap, devId) == DRBG_SUCCESS) {
|
---|
569 | ret = Hash_DRBG_Generate(rng->drbg, NULL, 0);
|
---|
570 | }
|
---|
571 | else
|
---|
572 | ret = DRBG_FAILURE;
|
---|
573 |
|
---|
574 | ForceZero(entropy, ENTROPY_NONCE_SZ);
|
---|
575 | FREE_VAR(entropy, rng->heap);
|
---|
576 | }
|
---|
577 | else
|
---|
578 | ret = DRBG_CONT_FAILURE;
|
---|
579 |
|
---|
580 | if (ret == DRBG_SUCCESS) {
|
---|
581 | rng->status = DRBG_OK;
|
---|
582 | ret = 0;
|
---|
583 | }
|
---|
584 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
585 | rng->status = DRBG_CONT_FAILED;
|
---|
586 | ret = DRBG_CONT_FIPS_E;
|
---|
587 | }
|
---|
588 | else if (ret == DRBG_FAILURE) {
|
---|
589 | rng->status = DRBG_FAILED;
|
---|
590 | ret = RNG_FAILURE_E;
|
---|
591 | }
|
---|
592 | else {
|
---|
593 | rng->status = DRBG_FAILED;
|
---|
594 | }
|
---|
595 | #endif /* HAVE_HASHDRBG */
|
---|
596 | #endif /* CUSTOM_RAND_GENERATE_BLOCK */
|
---|
597 |
|
---|
598 | return ret;
|
---|
599 | }
|
---|
600 |
|
---|
601 | int wc_InitRng(WC_RNG* rng)
|
---|
602 | {
|
---|
603 | return wc_InitRng_ex(rng, NULL, INVALID_DEVID);
|
---|
604 | }
|
---|
605 |
|
---|
606 |
|
---|
607 | /* place a generated block in output */
|
---|
608 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
|
---|
609 | {
|
---|
610 | int ret;
|
---|
611 |
|
---|
612 | if (rng == NULL || output == NULL)
|
---|
613 | return BAD_FUNC_ARG;
|
---|
614 |
|
---|
615 | #ifdef HAVE_INTEL_RDRAND
|
---|
616 | if (IS_INTEL_RDRAND(intel_flags))
|
---|
617 | return wc_GenerateRand_IntelRD(NULL, output, sz);
|
---|
618 | #endif
|
---|
619 |
|
---|
620 | #if defined(WOLFSSL_ASYNC_CRYPT)
|
---|
621 | if (rng->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RNG) {
|
---|
622 | /* these are blocking */
|
---|
623 | #ifdef HAVE_CAVIUM
|
---|
624 | return NitroxRngGenerateBlock(rng, output, sz);
|
---|
625 | #elif defined(HAVE_INTEL_QA)
|
---|
626 | return IntelQaDrbg(&rng->asyncDev, output, sz);
|
---|
627 | #else
|
---|
628 | /* simulator not supported */
|
---|
629 | #endif
|
---|
630 | }
|
---|
631 | #endif
|
---|
632 |
|
---|
633 | #ifdef CUSTOM_RAND_GENERATE_BLOCK
|
---|
634 | XMEMSET(output, 0, sz);
|
---|
635 | ret = CUSTOM_RAND_GENERATE_BLOCK(output, sz);
|
---|
636 | #else
|
---|
637 |
|
---|
638 | #ifdef HAVE_HASHDRBG
|
---|
639 | if (sz > RNG_MAX_BLOCK_LEN)
|
---|
640 | return BAD_FUNC_ARG;
|
---|
641 |
|
---|
642 | if (rng->status != DRBG_OK)
|
---|
643 | return RNG_FAILURE_E;
|
---|
644 |
|
---|
645 | ret = Hash_DRBG_Generate(rng->drbg, output, sz);
|
---|
646 | if (ret == DRBG_NEED_RESEED) {
|
---|
647 | if (wc_RNG_HealthTestLocal(1) == 0) {
|
---|
648 | byte entropy[ENTROPY_SZ];
|
---|
649 |
|
---|
650 | if (wc_GenerateSeed(&rng->seed, entropy, ENTROPY_SZ) == 0 &&
|
---|
651 | Hash_DRBG_Reseed(rng->drbg, entropy, ENTROPY_SZ)
|
---|
652 | == DRBG_SUCCESS) {
|
---|
653 |
|
---|
654 | ret = Hash_DRBG_Generate(rng->drbg, NULL, 0);
|
---|
655 | if (ret == DRBG_SUCCESS)
|
---|
656 | ret = Hash_DRBG_Generate(rng->drbg, output, sz);
|
---|
657 | }
|
---|
658 | else
|
---|
659 | ret = DRBG_FAILURE;
|
---|
660 |
|
---|
661 | ForceZero(entropy, ENTROPY_SZ);
|
---|
662 | }
|
---|
663 | else
|
---|
664 | ret = DRBG_CONT_FAILURE;
|
---|
665 | }
|
---|
666 |
|
---|
667 | if (ret == DRBG_SUCCESS) {
|
---|
668 | ret = 0;
|
---|
669 | }
|
---|
670 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
671 | ret = DRBG_CONT_FIPS_E;
|
---|
672 | rng->status = DRBG_CONT_FAILED;
|
---|
673 | }
|
---|
674 | else {
|
---|
675 | ret = RNG_FAILURE_E;
|
---|
676 | rng->status = DRBG_FAILED;
|
---|
677 | }
|
---|
678 | #else
|
---|
679 |
|
---|
680 | /* if we get here then there is an RNG configuration error */
|
---|
681 | ret = RNG_FAILURE_E;
|
---|
682 |
|
---|
683 | #endif /* HAVE_HASHDRBG */
|
---|
684 | #endif /* CUSTOM_RAND_GENERATE_BLOCK */
|
---|
685 |
|
---|
686 | return ret;
|
---|
687 | }
|
---|
688 |
|
---|
689 |
|
---|
690 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
691 | {
|
---|
692 | return wc_RNG_GenerateBlock(rng, b, 1);
|
---|
693 | }
|
---|
694 |
|
---|
695 |
|
---|
696 | int wc_FreeRng(WC_RNG* rng)
|
---|
697 | {
|
---|
698 | int ret = 0;
|
---|
699 |
|
---|
700 | if (rng == NULL)
|
---|
701 | return BAD_FUNC_ARG;
|
---|
702 |
|
---|
703 | #if defined(WOLFSSL_ASYNC_CRYPT)
|
---|
704 | wolfAsync_DevCtxFree(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG);
|
---|
705 | #endif
|
---|
706 |
|
---|
707 | #ifdef HAVE_HASHDRBG
|
---|
708 | if (rng->drbg != NULL) {
|
---|
709 | if (Hash_DRBG_Uninstantiate(rng->drbg) != DRBG_SUCCESS)
|
---|
710 | ret = RNG_FAILURE_E;
|
---|
711 |
|
---|
712 | XFREE(rng->drbg, rng->heap, DYNAMIC_TYPE_RNG);
|
---|
713 | rng->drbg = NULL;
|
---|
714 | }
|
---|
715 |
|
---|
716 | rng->status = DRBG_NOT_INIT;
|
---|
717 | #endif /* HAVE_HASHDRBG */
|
---|
718 |
|
---|
719 | return ret;
|
---|
720 | }
|
---|
721 |
|
---|
722 | #ifdef HAVE_HASHDRBG
|
---|
723 | int wc_RNG_HealthTest(int reseed, const byte* entropyA, word32 entropyASz,
|
---|
724 | const byte* entropyB, word32 entropyBSz,
|
---|
725 | byte* output, word32 outputSz)
|
---|
726 | {
|
---|
727 | int ret = -1;
|
---|
728 | DRBG* drbg;
|
---|
729 | #ifndef WOLFSSL_SMALL_STACK
|
---|
730 | DRBG drbg_var;
|
---|
731 | #endif
|
---|
732 |
|
---|
733 | if (entropyA == NULL || output == NULL) {
|
---|
734 | return BAD_FUNC_ARG;
|
---|
735 | }
|
---|
736 |
|
---|
737 | if (reseed != 0 && entropyB == NULL) {
|
---|
738 | return BAD_FUNC_ARG;
|
---|
739 | }
|
---|
740 |
|
---|
741 | if (outputSz != RNG_HEALTH_TEST_CHECK_SIZE) {
|
---|
742 | return ret;
|
---|
743 | }
|
---|
744 |
|
---|
745 | #ifdef WOLFSSL_SMALL_STACK
|
---|
746 | drbg = (struct DRBG*)XMALLOC(sizeof(DRBG), NULL, DYNAMIC_TYPE_RNG);
|
---|
747 | if (drbg == NULL) {
|
---|
748 | return MEMORY_E;
|
---|
749 | }
|
---|
750 | #else
|
---|
751 | drbg = &drbg_var;
|
---|
752 | #endif
|
---|
753 |
|
---|
754 | if (Hash_DRBG_Instantiate(drbg, entropyA, entropyASz, NULL, 0, NULL,
|
---|
755 | INVALID_DEVID) != 0) {
|
---|
756 | goto exit_rng_ht;
|
---|
757 | }
|
---|
758 |
|
---|
759 | if (reseed) {
|
---|
760 | if (Hash_DRBG_Reseed(drbg, entropyB, entropyBSz) != 0) {
|
---|
761 | goto exit_rng_ht;
|
---|
762 | }
|
---|
763 | }
|
---|
764 |
|
---|
765 | if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) {
|
---|
766 | goto exit_rng_ht;
|
---|
767 | }
|
---|
768 |
|
---|
769 | if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) {
|
---|
770 | goto exit_rng_ht;
|
---|
771 | }
|
---|
772 |
|
---|
773 | /* Mark success */
|
---|
774 | ret = 0;
|
---|
775 |
|
---|
776 | exit_rng_ht:
|
---|
777 |
|
---|
778 | /* This is safe to call even if Hash_DRBG_Instantiate fails */
|
---|
779 | if (Hash_DRBG_Uninstantiate(drbg) != 0) {
|
---|
780 | ret = -1;
|
---|
781 | }
|
---|
782 |
|
---|
783 | #ifdef WOLFSSL_SMALL_STACK
|
---|
784 | XFREE(drbg, NULL, DYNAMIC_TYPE_RNG);
|
---|
785 | #endif
|
---|
786 |
|
---|
787 | return ret;
|
---|
788 | }
|
---|
789 |
|
---|
790 |
|
---|
791 | const byte entropyA[] = {
|
---|
792 | 0x63, 0x36, 0x33, 0x77, 0xe4, 0x1e, 0x86, 0x46, 0x8d, 0xeb, 0x0a, 0xb4,
|
---|
793 | 0xa8, 0xed, 0x68, 0x3f, 0x6a, 0x13, 0x4e, 0x47, 0xe0, 0x14, 0xc7, 0x00,
|
---|
794 | 0x45, 0x4e, 0x81, 0xe9, 0x53, 0x58, 0xa5, 0x69, 0x80, 0x8a, 0xa3, 0x8f,
|
---|
795 | 0x2a, 0x72, 0xa6, 0x23, 0x59, 0x91, 0x5a, 0x9f, 0x8a, 0x04, 0xca, 0x68
|
---|
796 | };
|
---|
797 |
|
---|
798 | const byte reseedEntropyA[] = {
|
---|
799 | 0xe6, 0x2b, 0x8a, 0x8e, 0xe8, 0xf1, 0x41, 0xb6, 0x98, 0x05, 0x66, 0xe3,
|
---|
800 | 0xbf, 0xe3, 0xc0, 0x49, 0x03, 0xda, 0xd4, 0xac, 0x2c, 0xdf, 0x9f, 0x22,
|
---|
801 | 0x80, 0x01, 0x0a, 0x67, 0x39, 0xbc, 0x83, 0xd3
|
---|
802 | };
|
---|
803 |
|
---|
804 | const byte outputA[] = {
|
---|
805 | 0x04, 0xee, 0xc6, 0x3b, 0xb2, 0x31, 0xdf, 0x2c, 0x63, 0x0a, 0x1a, 0xfb,
|
---|
806 | 0xe7, 0x24, 0x94, 0x9d, 0x00, 0x5a, 0x58, 0x78, 0x51, 0xe1, 0xaa, 0x79,
|
---|
807 | 0x5e, 0x47, 0x73, 0x47, 0xc8, 0xb0, 0x56, 0x62, 0x1c, 0x18, 0xbd, 0xdc,
|
---|
808 | 0xdd, 0x8d, 0x99, 0xfc, 0x5f, 0xc2, 0xb9, 0x20, 0x53, 0xd8, 0xcf, 0xac,
|
---|
809 | 0xfb, 0x0b, 0xb8, 0x83, 0x12, 0x05, 0xfa, 0xd1, 0xdd, 0xd6, 0xc0, 0x71,
|
---|
810 | 0x31, 0x8a, 0x60, 0x18, 0xf0, 0x3b, 0x73, 0xf5, 0xed, 0xe4, 0xd4, 0xd0,
|
---|
811 | 0x71, 0xf9, 0xde, 0x03, 0xfd, 0x7a, 0xea, 0x10, 0x5d, 0x92, 0x99, 0xb8,
|
---|
812 | 0xaf, 0x99, 0xaa, 0x07, 0x5b, 0xdb, 0x4d, 0xb9, 0xaa, 0x28, 0xc1, 0x8d,
|
---|
813 | 0x17, 0x4b, 0x56, 0xee, 0x2a, 0x01, 0x4d, 0x09, 0x88, 0x96, 0xff, 0x22,
|
---|
814 | 0x82, 0xc9, 0x55, 0xa8, 0x19, 0x69, 0xe0, 0x69, 0xfa, 0x8c, 0xe0, 0x07,
|
---|
815 | 0xa1, 0x80, 0x18, 0x3a, 0x07, 0xdf, 0xae, 0x17
|
---|
816 | };
|
---|
817 |
|
---|
818 | const byte entropyB[] = {
|
---|
819 | 0xa6, 0x5a, 0xd0, 0xf3, 0x45, 0xdb, 0x4e, 0x0e, 0xff, 0xe8, 0x75, 0xc3,
|
---|
820 | 0xa2, 0xe7, 0x1f, 0x42, 0xc7, 0x12, 0x9d, 0x62, 0x0f, 0xf5, 0xc1, 0x19,
|
---|
821 | 0xa9, 0xef, 0x55, 0xf0, 0x51, 0x85, 0xe0, 0xfb, 0x85, 0x81, 0xf9, 0x31,
|
---|
822 | 0x75, 0x17, 0x27, 0x6e, 0x06, 0xe9, 0x60, 0x7d, 0xdb, 0xcb, 0xcc, 0x2e
|
---|
823 | };
|
---|
824 |
|
---|
825 | const byte outputB[] = {
|
---|
826 | 0xd3, 0xe1, 0x60, 0xc3, 0x5b, 0x99, 0xf3, 0x40, 0xb2, 0x62, 0x82, 0x64,
|
---|
827 | 0xd1, 0x75, 0x10, 0x60, 0xe0, 0x04, 0x5d, 0xa3, 0x83, 0xff, 0x57, 0xa5,
|
---|
828 | 0x7d, 0x73, 0xa6, 0x73, 0xd2, 0xb8, 0xd8, 0x0d, 0xaa, 0xf6, 0xa6, 0xc3,
|
---|
829 | 0x5a, 0x91, 0xbb, 0x45, 0x79, 0xd7, 0x3f, 0xd0, 0xc8, 0xfe, 0xd1, 0x11,
|
---|
830 | 0xb0, 0x39, 0x13, 0x06, 0x82, 0x8a, 0xdf, 0xed, 0x52, 0x8f, 0x01, 0x81,
|
---|
831 | 0x21, 0xb3, 0xfe, 0xbd, 0xc3, 0x43, 0xe7, 0x97, 0xb8, 0x7d, 0xbb, 0x63,
|
---|
832 | 0xdb, 0x13, 0x33, 0xde, 0xd9, 0xd1, 0xec, 0xe1, 0x77, 0xcf, 0xa6, 0xb7,
|
---|
833 | 0x1f, 0xe8, 0xab, 0x1d, 0xa4, 0x66, 0x24, 0xed, 0x64, 0x15, 0xe5, 0x1c,
|
---|
834 | 0xcd, 0xe2, 0xc7, 0xca, 0x86, 0xe2, 0x83, 0x99, 0x0e, 0xea, 0xeb, 0x91,
|
---|
835 | 0x12, 0x04, 0x15, 0x52, 0x8b, 0x22, 0x95, 0x91, 0x02, 0x81, 0xb0, 0x2d,
|
---|
836 | 0xd4, 0x31, 0xf4, 0xc9, 0xf7, 0x04, 0x27, 0xdf
|
---|
837 | };
|
---|
838 |
|
---|
839 |
|
---|
840 | static int wc_RNG_HealthTestLocal(int reseed)
|
---|
841 | {
|
---|
842 | int ret = 0;
|
---|
843 | #ifdef WOLFSSL_SMALL_STACK
|
---|
844 | byte* check;
|
---|
845 | #else
|
---|
846 | byte check[RNG_HEALTH_TEST_CHECK_SIZE];
|
---|
847 | #endif
|
---|
848 |
|
---|
849 | #ifdef WOLFSSL_SMALL_STACK
|
---|
850 | check = (byte*)XMALLOC(RNG_HEALTH_TEST_CHECK_SIZE, NULL,
|
---|
851 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
852 | if (check == NULL) {
|
---|
853 | return MEMORY_E;
|
---|
854 | }
|
---|
855 | #endif
|
---|
856 |
|
---|
857 | if (reseed) {
|
---|
858 | ret = wc_RNG_HealthTest(1, entropyA, sizeof(entropyA),
|
---|
859 | reseedEntropyA, sizeof(reseedEntropyA),
|
---|
860 | check, RNG_HEALTH_TEST_CHECK_SIZE);
|
---|
861 | if (ret == 0) {
|
---|
862 | if (ConstantCompare(check, outputA,
|
---|
863 | RNG_HEALTH_TEST_CHECK_SIZE) != 0)
|
---|
864 | ret = -1;
|
---|
865 | }
|
---|
866 | }
|
---|
867 | else {
|
---|
868 | ret = wc_RNG_HealthTest(0, entropyB, sizeof(entropyB),
|
---|
869 | NULL, 0,
|
---|
870 | check, RNG_HEALTH_TEST_CHECK_SIZE);
|
---|
871 | if (ret == 0) {
|
---|
872 | if (ConstantCompare(check, outputB,
|
---|
873 | RNG_HEALTH_TEST_CHECK_SIZE) != 0)
|
---|
874 | ret = -1;
|
---|
875 | }
|
---|
876 | }
|
---|
877 |
|
---|
878 | #ifdef WOLFSSL_SMALL_STACK
|
---|
879 | XFREE(check, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
880 | #endif
|
---|
881 |
|
---|
882 | return ret;
|
---|
883 | }
|
---|
884 |
|
---|
885 | #endif /* HAVE_HASHDRBG */
|
---|
886 |
|
---|
887 |
|
---|
888 | #ifdef HAVE_WNR
|
---|
889 |
|
---|
890 | /*
|
---|
891 | * Init global Whitewood netRandom context
|
---|
892 | * Returns 0 on success, negative on error
|
---|
893 | */
|
---|
894 | int wc_InitNetRandom(const char* configFile, wnr_hmac_key hmac_cb, int timeout)
|
---|
895 | {
|
---|
896 | if (configFile == NULL || timeout < 0)
|
---|
897 | return BAD_FUNC_ARG;
|
---|
898 |
|
---|
899 | if (wnr_mutex_init > 0) {
|
---|
900 | WOLFSSL_MSG("netRandom context already created, skipping");
|
---|
901 | return 0;
|
---|
902 | }
|
---|
903 |
|
---|
904 | if (wc_InitMutex(&wnr_mutex) != 0) {
|
---|
905 | WOLFSSL_MSG("Bad Init Mutex wnr_mutex");
|
---|
906 | return BAD_MUTEX_E;
|
---|
907 | }
|
---|
908 | wnr_mutex_init = 1;
|
---|
909 |
|
---|
910 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
911 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex");
|
---|
912 | return BAD_MUTEX_E;
|
---|
913 | }
|
---|
914 |
|
---|
915 | /* store entropy timeout */
|
---|
916 | wnr_timeout = timeout;
|
---|
917 |
|
---|
918 | /* create global wnr_context struct */
|
---|
919 | if (wnr_create(&wnr_ctx) != WNR_ERROR_NONE) {
|
---|
920 | WOLFSSL_MSG("Error creating global netRandom context");
|
---|
921 | return RNG_FAILURE_E;
|
---|
922 | }
|
---|
923 |
|
---|
924 | /* load config file */
|
---|
925 | if (wnr_config_loadf(wnr_ctx, (char*)configFile) != WNR_ERROR_NONE) {
|
---|
926 | WOLFSSL_MSG("Error loading config file into netRandom context");
|
---|
927 | wnr_destroy(wnr_ctx);
|
---|
928 | wnr_ctx = NULL;
|
---|
929 | return RNG_FAILURE_E;
|
---|
930 | }
|
---|
931 |
|
---|
932 | /* create/init polling mechanism */
|
---|
933 | if (wnr_poll_create() != WNR_ERROR_NONE) {
|
---|
934 | printf("ERROR: wnr_poll_create() failed\n");
|
---|
935 | WOLFSSL_MSG("Error initializing netRandom polling mechanism");
|
---|
936 | wnr_destroy(wnr_ctx);
|
---|
937 | wnr_ctx = NULL;
|
---|
938 | return RNG_FAILURE_E;
|
---|
939 | }
|
---|
940 |
|
---|
941 | /* validate config, set HMAC callback (optional) */
|
---|
942 | if (wnr_setup(wnr_ctx, hmac_cb) != WNR_ERROR_NONE) {
|
---|
943 | WOLFSSL_MSG("Error setting up netRandom context");
|
---|
944 | wnr_destroy(wnr_ctx);
|
---|
945 | wnr_ctx = NULL;
|
---|
946 | wnr_poll_destroy();
|
---|
947 | return RNG_FAILURE_E;
|
---|
948 | }
|
---|
949 |
|
---|
950 | wc_UnLockMutex(&wnr_mutex);
|
---|
951 |
|
---|
952 | return 0;
|
---|
953 | }
|
---|
954 |
|
---|
955 | /*
|
---|
956 | * Free global Whitewood netRandom context
|
---|
957 | * Returns 0 on success, negative on error
|
---|
958 | */
|
---|
959 | int wc_FreeNetRandom(void)
|
---|
960 | {
|
---|
961 | if (wnr_mutex_init > 0) {
|
---|
962 |
|
---|
963 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
964 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex");
|
---|
965 | return BAD_MUTEX_E;
|
---|
966 | }
|
---|
967 |
|
---|
968 | if (wnr_ctx != NULL) {
|
---|
969 | wnr_destroy(wnr_ctx);
|
---|
970 | wnr_ctx = NULL;
|
---|
971 | }
|
---|
972 | wnr_poll_destroy();
|
---|
973 |
|
---|
974 | wc_UnLockMutex(&wnr_mutex);
|
---|
975 |
|
---|
976 | wc_FreeMutex(&wnr_mutex);
|
---|
977 | wnr_mutex_init = 0;
|
---|
978 | }
|
---|
979 |
|
---|
980 | return 0;
|
---|
981 | }
|
---|
982 |
|
---|
983 | #endif /* HAVE_WNR */
|
---|
984 |
|
---|
985 |
|
---|
986 | #if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED)
|
---|
987 |
|
---|
988 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
989 | /* need more retries if multiple cores */
|
---|
990 | #define INTELRD_RETRY (32 * 8)
|
---|
991 | #else
|
---|
992 | #define INTELRD_RETRY 32
|
---|
993 | #endif
|
---|
994 |
|
---|
995 | #ifdef HAVE_INTEL_RDSEED
|
---|
996 |
|
---|
997 | /* return 0 on success */
|
---|
998 | static INLINE int IntelRDseed64(word64* seed)
|
---|
999 | {
|
---|
1000 | unsigned char ok;
|
---|
1001 |
|
---|
1002 | __asm__ volatile("rdseed %0; setc %1":"=r"(*seed), "=qm"(ok));
|
---|
1003 | return (ok) ? 0 : -1;
|
---|
1004 | }
|
---|
1005 |
|
---|
1006 | /* return 0 on success */
|
---|
1007 | static INLINE int IntelRDseed64_r(word64* rnd)
|
---|
1008 | {
|
---|
1009 | int i;
|
---|
1010 | for (i = 0; i < INTELRD_RETRY; i++) {
|
---|
1011 | if (IntelRDseed64(rnd) == 0)
|
---|
1012 | return 0;
|
---|
1013 | }
|
---|
1014 | return -1;
|
---|
1015 | }
|
---|
1016 |
|
---|
1017 | /* return 0 on success */
|
---|
1018 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
1019 | {
|
---|
1020 | int ret;
|
---|
1021 | word64 rndTmp;
|
---|
1022 |
|
---|
1023 | (void)os;
|
---|
1024 |
|
---|
1025 | if (!IS_INTEL_RDSEED(intel_flags))
|
---|
1026 | return -1;
|
---|
1027 |
|
---|
1028 | for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64),
|
---|
1029 | output += sizeof(word64)) {
|
---|
1030 | ret = IntelRDseed64_r((word64*)output);
|
---|
1031 | if (ret != 0)
|
---|
1032 | return ret;
|
---|
1033 | }
|
---|
1034 | if (sz == 0)
|
---|
1035 | return 0;
|
---|
1036 |
|
---|
1037 | /* handle unaligned remainder */
|
---|
1038 | ret = IntelRDseed64_r(&rndTmp);
|
---|
1039 | if (ret != 0)
|
---|
1040 | return ret;
|
---|
1041 |
|
---|
1042 | XMEMCPY(output, &rndTmp, sz);
|
---|
1043 |
|
---|
1044 | return 0;
|
---|
1045 | }
|
---|
1046 |
|
---|
1047 | #endif /* HAVE_INTEL_RDSEED */
|
---|
1048 |
|
---|
1049 | #ifdef HAVE_INTEL_RDRAND
|
---|
1050 |
|
---|
1051 | /* return 0 on success */
|
---|
1052 | static INLINE int IntelRDrand64(word64 *rnd)
|
---|
1053 | {
|
---|
1054 | unsigned char ok;
|
---|
1055 |
|
---|
1056 | __asm__ volatile("rdrand %0; setc %1":"=r"(*rnd), "=qm"(ok));
|
---|
1057 |
|
---|
1058 | return (ok) ? 0 : -1;
|
---|
1059 | }
|
---|
1060 |
|
---|
1061 | /* return 0 on success */
|
---|
1062 | static INLINE int IntelRDrand64_r(word64 *rnd)
|
---|
1063 | {
|
---|
1064 | int i;
|
---|
1065 | for (i = 0; i < INTELRD_RETRY; i++) {
|
---|
1066 | if (IntelRDrand64(rnd) == 0)
|
---|
1067 | return 0;
|
---|
1068 | }
|
---|
1069 | return -1;
|
---|
1070 | }
|
---|
1071 |
|
---|
1072 | /* return 0 on success */
|
---|
1073 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
1074 | {
|
---|
1075 | int ret;
|
---|
1076 | word64 rndTmp;
|
---|
1077 |
|
---|
1078 | (void)os;
|
---|
1079 |
|
---|
1080 | if (!IS_INTEL_RDRAND(intel_flags))
|
---|
1081 | return -1;
|
---|
1082 |
|
---|
1083 | for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64),
|
---|
1084 | output += sizeof(word64)) {
|
---|
1085 | ret = IntelRDrand64_r((word64 *)output);
|
---|
1086 | if (ret != 0)
|
---|
1087 | return ret;
|
---|
1088 | }
|
---|
1089 | if (sz == 0)
|
---|
1090 | return 0;
|
---|
1091 |
|
---|
1092 | /* handle unaligned remainder */
|
---|
1093 | ret = IntelRDrand64_r(&rndTmp);
|
---|
1094 | if (ret != 0)
|
---|
1095 | return ret;
|
---|
1096 |
|
---|
1097 | XMEMCPY(output, &rndTmp, sz);
|
---|
1098 |
|
---|
1099 | return 0;
|
---|
1100 | }
|
---|
1101 |
|
---|
1102 | #endif /* HAVE_INTEL_RDRAND */
|
---|
1103 | #endif /* HAVE_INTEL_RDRAND || HAVE_INTEL_RDSEED */
|
---|
1104 |
|
---|
1105 |
|
---|
1106 | /* Begin wc_GenerateSeed Implementations */
|
---|
1107 | #if defined(CUSTOM_RAND_GENERATE_SEED)
|
---|
1108 |
|
---|
1109 | /* Implement your own random generation function
|
---|
1110 | * Return 0 to indicate success
|
---|
1111 | * int rand_gen_seed(byte* output, word32 sz);
|
---|
1112 | * #define CUSTOM_RAND_GENERATE_SEED rand_gen_seed */
|
---|
1113 |
|
---|
1114 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1115 | {
|
---|
1116 | extern int CUSTOM_RAND_GENERATE_SEED(byte* output, word32 sz);
|
---|
1117 | (void)os; /* Suppress unused arg warning */
|
---|
1118 | return CUSTOM_RAND_GENERATE_SEED(output, sz);
|
---|
1119 | }
|
---|
1120 |
|
---|
1121 | #elif defined(CUSTOM_RAND_GENERATE_SEED_OS)
|
---|
1122 |
|
---|
1123 | /* Implement your own random generation function,
|
---|
1124 | * which includes OS_Seed.
|
---|
1125 | * Return 0 to indicate success
|
---|
1126 | * int rand_gen_seed(OS_Seed* os, byte* output, word32 sz);
|
---|
1127 | * #define CUSTOM_RAND_GENERATE_SEED_OS rand_gen_seed */
|
---|
1128 |
|
---|
1129 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1130 | {
|
---|
1131 | return CUSTOM_RAND_GENERATE_SEED_OS(os, output, sz);
|
---|
1132 | }
|
---|
1133 |
|
---|
1134 | #elif defined(CUSTOM_RAND_GENERATE)
|
---|
1135 |
|
---|
1136 | /* Implement your own random generation function
|
---|
1137 | * word32 rand_gen(void);
|
---|
1138 | * #define CUSTOM_RAND_GENERATE rand_gen */
|
---|
1139 |
|
---|
1140 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1141 | {
|
---|
1142 | word32 i = 0;
|
---|
1143 |
|
---|
1144 | (void)os;
|
---|
1145 |
|
---|
1146 | while (i < sz)
|
---|
1147 | {
|
---|
1148 | /* If not aligned or there is odd/remainder */
|
---|
1149 | if( (i + sizeof(CUSTOM_RAND_TYPE)) > sz ||
|
---|
1150 | ((wolfssl_word)&output[i] % sizeof(CUSTOM_RAND_TYPE)) != 0
|
---|
1151 | ) {
|
---|
1152 | /* Single byte at a time */
|
---|
1153 | output[i++] = (byte)CUSTOM_RAND_GENERATE();
|
---|
1154 | }
|
---|
1155 | else {
|
---|
1156 | /* Use native 8, 16, 32 or 64 copy instruction */
|
---|
1157 | *((CUSTOM_RAND_TYPE*)&output[i]) = CUSTOM_RAND_GENERATE();
|
---|
1158 | i += sizeof(CUSTOM_RAND_TYPE);
|
---|
1159 | }
|
---|
1160 | }
|
---|
1161 |
|
---|
1162 | return 0;
|
---|
1163 | }
|
---|
1164 |
|
---|
1165 | #elif defined(WOLFSSL_SGX)
|
---|
1166 |
|
---|
1167 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1168 | {
|
---|
1169 | int ret = !SGX_SUCCESS;
|
---|
1170 | int i, read_max = 10;
|
---|
1171 |
|
---|
1172 | for (i = 0; i < read_max && ret != SGX_SUCCESS; i++) {
|
---|
1173 | ret = sgx_read_rand(output, sz);
|
---|
1174 | }
|
---|
1175 |
|
---|
1176 | (void)os;
|
---|
1177 | return (ret == SGX_SUCCESS) ? 0 : 1;
|
---|
1178 | }
|
---|
1179 |
|
---|
1180 | #elif defined(USE_WINDOWS_API)
|
---|
1181 |
|
---|
1182 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1183 | {
|
---|
1184 | if(!CryptAcquireContext(&os->handle, 0, 0, PROV_RSA_FULL,
|
---|
1185 | CRYPT_VERIFYCONTEXT))
|
---|
1186 | return WINCRYPT_E;
|
---|
1187 |
|
---|
1188 | if (!CryptGenRandom(os->handle, sz, output))
|
---|
1189 | return CRYPTGEN_E;
|
---|
1190 |
|
---|
1191 | CryptReleaseContext(os->handle, 0);
|
---|
1192 |
|
---|
1193 | return 0;
|
---|
1194 | }
|
---|
1195 |
|
---|
1196 |
|
---|
1197 | #elif defined(HAVE_RTP_SYS) || defined(EBSNET)
|
---|
1198 |
|
---|
1199 | #include "rtprand.h" /* rtp_rand () */
|
---|
1200 | #include "rtptime.h" /* rtp_get_system_msec() */
|
---|
1201 |
|
---|
1202 |
|
---|
1203 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1204 | {
|
---|
1205 | int i;
|
---|
1206 | rtp_srand(rtp_get_system_msec());
|
---|
1207 |
|
---|
1208 | for (i = 0; i < sz; i++ ) {
|
---|
1209 | output[i] = rtp_rand() % 256;
|
---|
1210 | if ( (i % 8) == 7)
|
---|
1211 | rtp_srand(rtp_get_system_msec());
|
---|
1212 | }
|
---|
1213 |
|
---|
1214 | return 0;
|
---|
1215 | }
|
---|
1216 |
|
---|
1217 |
|
---|
1218 | #elif defined(MICROCHIP_PIC32)
|
---|
1219 |
|
---|
1220 | #ifdef MICROCHIP_MPLAB_HARMONY
|
---|
1221 | #define PIC32_SEED_COUNT _CP0_GET_COUNT
|
---|
1222 | #else
|
---|
1223 | #if !defined(WOLFSSL_MICROCHIP_PIC32MZ)
|
---|
1224 | #include <peripheral/timer.h>
|
---|
1225 | #endif
|
---|
1226 | extern word32 ReadCoreTimer(void);
|
---|
1227 | #define PIC32_SEED_COUNT ReadCoreTimer
|
---|
1228 | #endif
|
---|
1229 |
|
---|
1230 | #ifdef WOLFSSL_PIC32MZ_RNG
|
---|
1231 | #include "xc.h"
|
---|
1232 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1233 | {
|
---|
1234 | int i;
|
---|
1235 | byte rnd[8];
|
---|
1236 | word32 *rnd32 = (word32 *)rnd;
|
---|
1237 | word32 size = sz;
|
---|
1238 | byte* op = output;
|
---|
1239 |
|
---|
1240 | #if ((__PIC32_FEATURE_SET0 == 'E') && (__PIC32_FEATURE_SET1 == 'C'))
|
---|
1241 | RNGNUMGEN1 = _CP0_GET_COUNT();
|
---|
1242 | RNGPOLY1 = _CP0_GET_COUNT();
|
---|
1243 | RNGPOLY2 = _CP0_GET_COUNT();
|
---|
1244 | RNGNUMGEN2 = _CP0_GET_COUNT();
|
---|
1245 | #else
|
---|
1246 | // All others can be seeded from the TRNG
|
---|
1247 | RNGCONbits.TRNGMODE = 1;
|
---|
1248 | RNGCONbits.TRNGEN = 1;
|
---|
1249 | while (RNGCNT < 64);
|
---|
1250 | RNGCONbits.LOAD = 1;
|
---|
1251 | while (RNGCONbits.LOAD == 1);
|
---|
1252 | while (RNGCNT < 64);
|
---|
1253 | RNGPOLY2 = RNGSEED2;
|
---|
1254 | RNGPOLY1 = RNGSEED1;
|
---|
1255 | #endif
|
---|
1256 |
|
---|
1257 | RNGCONbits.PLEN = 0x40;
|
---|
1258 | RNGCONbits.PRNGEN = 1;
|
---|
1259 | for (i=0; i<5; i++) { /* wait for RNGNUMGEN ready */
|
---|
1260 | volatile int x;
|
---|
1261 | x = RNGNUMGEN1;
|
---|
1262 | x = RNGNUMGEN2;
|
---|
1263 | (void)x;
|
---|
1264 | }
|
---|
1265 | do {
|
---|
1266 | rnd32[0] = RNGNUMGEN1;
|
---|
1267 | rnd32[1] = RNGNUMGEN2;
|
---|
1268 |
|
---|
1269 | for(i=0; i<8; i++, op++) {
|
---|
1270 | *op = rnd[i];
|
---|
1271 | size --;
|
---|
1272 | if(size==0)break;
|
---|
1273 | }
|
---|
1274 | } while(size);
|
---|
1275 | return 0;
|
---|
1276 | }
|
---|
1277 | #else /* WOLFSSL_PIC32MZ_RNG */
|
---|
1278 | /* uses the core timer, in nanoseconds to seed srand */
|
---|
1279 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1280 | {
|
---|
1281 | int i;
|
---|
1282 | srand(PIC32_SEED_COUNT() * 25);
|
---|
1283 |
|
---|
1284 | for (i = 0; i < sz; i++ ) {
|
---|
1285 | output[i] = rand() % 256;
|
---|
1286 | if ( (i % 8) == 7)
|
---|
1287 | srand(PIC32_SEED_COUNT() * 25);
|
---|
1288 | }
|
---|
1289 | return 0;
|
---|
1290 | }
|
---|
1291 | #endif /* WOLFSSL_PIC32MZ_RNG */
|
---|
1292 |
|
---|
1293 | #elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) || \
|
---|
1294 | defined(FREESCALE_KSDK_BM) || defined(FREESCALE_FREE_RTOS)
|
---|
1295 |
|
---|
1296 | #if defined(FREESCALE_K70_RNGA) || defined(FREESCALE_RNGA)
|
---|
1297 | /*
|
---|
1298 | * wc_Generates a RNG seed using the Random Number Generator Accelerator
|
---|
1299 | * on the Kinetis K70. Documentation located in Chapter 37 of
|
---|
1300 | * K70 Sub-Family Reference Manual (see Note 3 in the README for link).
|
---|
1301 | */
|
---|
1302 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1303 | {
|
---|
1304 | int i;
|
---|
1305 |
|
---|
1306 | /* turn on RNGA module */
|
---|
1307 | #if defined(SIM_SCGC3_RNGA_MASK)
|
---|
1308 | SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK;
|
---|
1309 | #endif
|
---|
1310 | #if defined(SIM_SCGC6_RNGA_MASK)
|
---|
1311 | /* additionally needed for at least K64F */
|
---|
1312 | SIM_SCGC6 |= SIM_SCGC6_RNGA_MASK;
|
---|
1313 | #endif
|
---|
1314 |
|
---|
1315 | /* set SLP bit to 0 - "RNGA is not in sleep mode" */
|
---|
1316 | RNG_CR &= ~RNG_CR_SLP_MASK;
|
---|
1317 |
|
---|
1318 | /* set HA bit to 1 - "security violations masked" */
|
---|
1319 | RNG_CR |= RNG_CR_HA_MASK;
|
---|
1320 |
|
---|
1321 | /* set GO bit to 1 - "output register loaded with data" */
|
---|
1322 | RNG_CR |= RNG_CR_GO_MASK;
|
---|
1323 |
|
---|
1324 | for (i = 0; i < sz; i++) {
|
---|
1325 |
|
---|
1326 | /* wait for RNG FIFO to be full */
|
---|
1327 | while((RNG_SR & RNG_SR_OREG_LVL(0xF)) == 0) {}
|
---|
1328 |
|
---|
1329 | /* get value */
|
---|
1330 | output[i] = RNG_OR;
|
---|
1331 | }
|
---|
1332 |
|
---|
1333 | return 0;
|
---|
1334 | }
|
---|
1335 |
|
---|
1336 | #elif defined(FREESCALE_K53_RNGB) || defined(FREESCALE_RNGB)
|
---|
1337 | /*
|
---|
1338 | * wc_Generates a RNG seed using the Random Number Generator (RNGB)
|
---|
1339 | * on the Kinetis K53. Documentation located in Chapter 33 of
|
---|
1340 | * K53 Sub-Family Reference Manual (see note in the README for link).
|
---|
1341 | */
|
---|
1342 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1343 | {
|
---|
1344 | int i;
|
---|
1345 |
|
---|
1346 | /* turn on RNGB module */
|
---|
1347 | SIM_SCGC3 |= SIM_SCGC3_RNGB_MASK;
|
---|
1348 |
|
---|
1349 | /* reset RNGB */
|
---|
1350 | RNG_CMD |= RNG_CMD_SR_MASK;
|
---|
1351 |
|
---|
1352 | /* FIFO generate interrupt, return all zeros on underflow,
|
---|
1353 | * set auto reseed */
|
---|
1354 | RNG_CR |= (RNG_CR_FUFMOD_MASK | RNG_CR_AR_MASK);
|
---|
1355 |
|
---|
1356 | /* gen seed, clear interrupts, clear errors */
|
---|
1357 | RNG_CMD |= (RNG_CMD_GS_MASK | RNG_CMD_CI_MASK | RNG_CMD_CE_MASK);
|
---|
1358 |
|
---|
1359 | /* wait for seeding to complete */
|
---|
1360 | while ((RNG_SR & RNG_SR_SDN_MASK) == 0) {}
|
---|
1361 |
|
---|
1362 | for (i = 0; i < sz; i++) {
|
---|
1363 |
|
---|
1364 | /* wait for a word to be available from FIFO */
|
---|
1365 | while((RNG_SR & RNG_SR_FIFO_LVL_MASK) == 0) {}
|
---|
1366 |
|
---|
1367 | /* get value */
|
---|
1368 | output[i] = RNG_OUT;
|
---|
1369 | }
|
---|
1370 |
|
---|
1371 | return 0;
|
---|
1372 | }
|
---|
1373 |
|
---|
1374 | #elif defined(FREESCALE_KSDK_2_0_TRNG)
|
---|
1375 |
|
---|
1376 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1377 | {
|
---|
1378 | status_t status;
|
---|
1379 | status = TRNG_GetRandomData(TRNG0, output, sz);
|
---|
1380 | if (status == kStatus_Success)
|
---|
1381 | {
|
---|
1382 | return(0);
|
---|
1383 | }
|
---|
1384 | else
|
---|
1385 | {
|
---|
1386 | return RAN_BLOCK_E;
|
---|
1387 | }
|
---|
1388 | }
|
---|
1389 |
|
---|
1390 | #elif defined(FREESCALE_KSDK_2_0_RNGA)
|
---|
1391 |
|
---|
1392 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1393 | {
|
---|
1394 | status_t status;
|
---|
1395 | status = RNGA_GetRandomData(RNG, output, sz);
|
---|
1396 | if (status == kStatus_Success)
|
---|
1397 | {
|
---|
1398 | return(0);
|
---|
1399 | }
|
---|
1400 | else
|
---|
1401 | {
|
---|
1402 | return RAN_BLOCK_E;
|
---|
1403 | }
|
---|
1404 | }
|
---|
1405 |
|
---|
1406 |
|
---|
1407 | #elif defined(FREESCALE_RNGA)
|
---|
1408 |
|
---|
1409 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1410 | {
|
---|
1411 | RNGA_DRV_GetRandomData(RNGA_INSTANCE, output, sz);
|
---|
1412 | return 0;
|
---|
1413 | }
|
---|
1414 |
|
---|
1415 | #else
|
---|
1416 | #define USE_TEST_GENSEED
|
---|
1417 | #endif /* FREESCALE_K70_RNGA */
|
---|
1418 |
|
---|
1419 | #elif defined(STM32_RNG)
|
---|
1420 | /*
|
---|
1421 | * wc_Generate a RNG seed using the hardware random number generator
|
---|
1422 | * on the STM32F2/F4/F7. */
|
---|
1423 |
|
---|
1424 | #ifdef WOLFSSL_STM32_CUBEMX
|
---|
1425 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1426 | {
|
---|
1427 | RNG_HandleTypeDef hrng;
|
---|
1428 | int i;
|
---|
1429 | (void)os;
|
---|
1430 |
|
---|
1431 | /* enable RNG clock source */
|
---|
1432 | __HAL_RCC_RNG_CLK_ENABLE();
|
---|
1433 |
|
---|
1434 | /* enable RNG peripheral */
|
---|
1435 | hrng.Instance = RNG;
|
---|
1436 | HAL_RNG_Init(&hrng);
|
---|
1437 |
|
---|
1438 | for (i = 0; i < (int)sz; i++) {
|
---|
1439 | /* get value */
|
---|
1440 | output[i] = (byte)HAL_RNG_GetRandomNumber(&hrng);
|
---|
1441 | }
|
---|
1442 |
|
---|
1443 | return 0;
|
---|
1444 | }
|
---|
1445 | #else
|
---|
1446 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1447 | {
|
---|
1448 | int i;
|
---|
1449 | (void)os;
|
---|
1450 |
|
---|
1451 | /* enable RNG clock source */
|
---|
1452 | RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
|
---|
1453 |
|
---|
1454 | /* reset RNG */
|
---|
1455 | RNG_DeInit();
|
---|
1456 |
|
---|
1457 | /* enable RNG peripheral */
|
---|
1458 | RNG_Cmd(ENABLE);
|
---|
1459 |
|
---|
1460 | /* verify no errors with RNG_CLK or Seed */
|
---|
1461 | if (RNG_GetFlagStatus(RNG_FLAG_SECS | RNG_FLAG_CECS) != RESET)
|
---|
1462 | return RNG_FAILURE_E;
|
---|
1463 |
|
---|
1464 | for (i = 0; i < (int)sz; i++) {
|
---|
1465 | /* wait until RNG number is ready */
|
---|
1466 | while (RNG_GetFlagStatus(RNG_FLAG_DRDY) == RESET) { }
|
---|
1467 |
|
---|
1468 | /* get value */
|
---|
1469 | output[i] = RNG_GetRandomNumber();
|
---|
1470 | }
|
---|
1471 |
|
---|
1472 | return 0;
|
---|
1473 | }
|
---|
1474 | #endif /* WOLFSSL_STM32_CUBEMX */
|
---|
1475 |
|
---|
1476 | #elif defined(WOLFSSL_TIRTOS)
|
---|
1477 |
|
---|
1478 | #include <xdc/runtime/Timestamp.h>
|
---|
1479 | #include <stdlib.h>
|
---|
1480 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1481 | {
|
---|
1482 | int i;
|
---|
1483 | srand(xdc_runtime_Timestamp_get32());
|
---|
1484 |
|
---|
1485 | for (i = 0; i < sz; i++ ) {
|
---|
1486 | output[i] = rand() % 256;
|
---|
1487 | if ((i % 8) == 7) {
|
---|
1488 | srand(xdc_runtime_Timestamp_get32());
|
---|
1489 | }
|
---|
1490 | }
|
---|
1491 |
|
---|
1492 | return 0;
|
---|
1493 | }
|
---|
1494 |
|
---|
1495 | #elif defined(WOLFSSL_VXWORKS)
|
---|
1496 |
|
---|
1497 | #include <randomNumGen.h>
|
---|
1498 |
|
---|
1499 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) {
|
---|
1500 | STATUS status;
|
---|
1501 |
|
---|
1502 | #ifdef VXWORKS_SIM
|
---|
1503 | /* cannot generate true entropy with VxWorks simulator */
|
---|
1504 | #warning "not enough entropy, simulator for testing only"
|
---|
1505 | int i = 0;
|
---|
1506 |
|
---|
1507 | for (i = 0; i < 1000; i++) {
|
---|
1508 | randomAddTimeStamp();
|
---|
1509 | }
|
---|
1510 | #endif
|
---|
1511 |
|
---|
1512 | status = randBytes (output, sz);
|
---|
1513 | if (status == ERROR) {
|
---|
1514 | return RNG_FAILURE_E;
|
---|
1515 | }
|
---|
1516 |
|
---|
1517 | return 0;
|
---|
1518 | }
|
---|
1519 |
|
---|
1520 | #elif defined(WOLFSSL_NRF51)
|
---|
1521 | #include "app_error.h"
|
---|
1522 | #include "nrf_drv_rng.h"
|
---|
1523 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1524 | {
|
---|
1525 | int remaining = sz, length, pos = 0;
|
---|
1526 | uint8_t available;
|
---|
1527 | uint32_t err_code;
|
---|
1528 |
|
---|
1529 | (void)os;
|
---|
1530 |
|
---|
1531 | /* Make sure RNG is running */
|
---|
1532 | err_code = nrf_drv_rng_init(NULL);
|
---|
1533 | if (err_code != NRF_SUCCESS && err_code != NRF_ERROR_INVALID_STATE) {
|
---|
1534 | return -1;
|
---|
1535 | }
|
---|
1536 |
|
---|
1537 | while (remaining > 0) {
|
---|
1538 | err_code = nrf_drv_rng_bytes_available(&available);
|
---|
1539 | if (err_code == NRF_SUCCESS) {
|
---|
1540 | length = (remaining < available) ? remaining : available;
|
---|
1541 | if (length > 0) {
|
---|
1542 | err_code = nrf_drv_rng_rand(&output[pos], length);
|
---|
1543 | remaining -= length;
|
---|
1544 | pos += length;
|
---|
1545 | }
|
---|
1546 | }
|
---|
1547 |
|
---|
1548 | if (err_code != NRF_SUCCESS) {
|
---|
1549 | break;
|
---|
1550 | }
|
---|
1551 | }
|
---|
1552 |
|
---|
1553 | return (err_code == NRF_SUCCESS) ? 0 : -1;
|
---|
1554 | }
|
---|
1555 |
|
---|
1556 | #elif defined(HAVE_WNR)
|
---|
1557 |
|
---|
1558 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1559 | {
|
---|
1560 | if (os == NULL || output == NULL || wnr_ctx == NULL ||
|
---|
1561 | wnr_timeout < 0) {
|
---|
1562 | return BAD_FUNC_ARG;
|
---|
1563 | }
|
---|
1564 |
|
---|
1565 | if (wnr_mutex_init == 0) {
|
---|
1566 | WOLFSSL_MSG("netRandom context must be created before use");
|
---|
1567 | return RNG_FAILURE_E;
|
---|
1568 | }
|
---|
1569 |
|
---|
1570 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
1571 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex\n");
|
---|
1572 | return BAD_MUTEX_E;
|
---|
1573 | }
|
---|
1574 |
|
---|
1575 | if (wnr_get_entropy(wnr_ctx, wnr_timeout, output, sz, sz) !=
|
---|
1576 | WNR_ERROR_NONE)
|
---|
1577 | return RNG_FAILURE_E;
|
---|
1578 |
|
---|
1579 | wc_UnLockMutex(&wnr_mutex);
|
---|
1580 |
|
---|
1581 | return 0;
|
---|
1582 | }
|
---|
1583 |
|
---|
1584 | #elif defined(WOLFSSL_ATMEL)
|
---|
1585 | #include <wolfssl/wolfcrypt/port/atmel/atmel.h>
|
---|
1586 |
|
---|
1587 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1588 | {
|
---|
1589 | int ret = 0;
|
---|
1590 |
|
---|
1591 | (void)os;
|
---|
1592 | if (output == NULL) {
|
---|
1593 | return BUFFER_E;
|
---|
1594 | }
|
---|
1595 |
|
---|
1596 | ret = atmel_get_random_number(sz, output);
|
---|
1597 |
|
---|
1598 | return ret;
|
---|
1599 | }
|
---|
1600 |
|
---|
1601 | #elif defined(INTIME_RTOS)
|
---|
1602 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1603 | {
|
---|
1604 | int ret = 0;
|
---|
1605 |
|
---|
1606 | (void)os;
|
---|
1607 |
|
---|
1608 | if (output == NULL) {
|
---|
1609 | return BUFFER_E;
|
---|
1610 | }
|
---|
1611 |
|
---|
1612 | /* Note: Investigate better solution */
|
---|
1613 | /* no return to check */
|
---|
1614 | arc4random_buf(output, sz);
|
---|
1615 |
|
---|
1616 | return ret;
|
---|
1617 | }
|
---|
1618 |
|
---|
1619 | #elif defined(IDIRECT_DEV_RANDOM)
|
---|
1620 |
|
---|
1621 | extern int getRandom( int sz, unsigned char *output );
|
---|
1622 |
|
---|
1623 | int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1624 | {
|
---|
1625 | int num_bytes_returned = 0;
|
---|
1626 |
|
---|
1627 | num_bytes_returned = getRandom( (int) sz, (unsigned char *) output );
|
---|
1628 |
|
---|
1629 | return 0;
|
---|
1630 | }
|
---|
1631 |
|
---|
1632 | #elif defined(CUSTOM_RAND_GENERATE_BLOCK)
|
---|
1633 | /* #define CUSTOM_RAND_GENERATE_BLOCK myRngFunc
|
---|
1634 | * extern int myRngFunc(byte* output, word32 sz);
|
---|
1635 | */
|
---|
1636 |
|
---|
1637 | #elif defined(WOLFSSL_SAFERTOS) || defined(WOLFSSL_LEANPSK) || \
|
---|
1638 | defined(WOLFSSL_IAR_ARM) || defined(WOLFSSL_MDK_ARM) || \
|
---|
1639 | defined(WOLFSSL_uITRON4) || defined(WOLFSSL_uTKERNEL2) || \
|
---|
1640 | defined(WOLFSSL_LPC43xx) || defined(WOLFSSL_STM32F2xx) || \
|
---|
1641 | defined(MBED) || defined(WOLFSSL_EMBOS) || \
|
---|
1642 | defined(WOLFSSL_GENSEED_FORTEST)
|
---|
1643 |
|
---|
1644 | /* these platforms do not have a default random seed and
|
---|
1645 | you'll need to implement your own wc_GenerateSeed or define via
|
---|
1646 | CUSTOM_RAND_GENERATE_BLOCK */
|
---|
1647 |
|
---|
1648 | #define USE_TEST_GENSEED
|
---|
1649 |
|
---|
1650 | #elif defined(NO_DEV_RANDOM)
|
---|
1651 |
|
---|
1652 | #error "you need to write an os specific wc_GenerateSeed() here"
|
---|
1653 |
|
---|
1654 | /*
|
---|
1655 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1656 | {
|
---|
1657 | return 0;
|
---|
1658 | }
|
---|
1659 | */
|
---|
1660 |
|
---|
1661 | #else
|
---|
1662 |
|
---|
1663 | /* may block */
|
---|
1664 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1665 | {
|
---|
1666 | int ret = 0;
|
---|
1667 |
|
---|
1668 | #ifdef HAVE_INTEL_RDSEED
|
---|
1669 | if (IS_INTEL_RDSEED(intel_flags)) {
|
---|
1670 | ret = wc_GenerateSeed_IntelRD(NULL, output, sz);
|
---|
1671 | if (ret == 0) {
|
---|
1672 | /* success, we're done */
|
---|
1673 | return ret;
|
---|
1674 | }
|
---|
1675 | #ifdef FORCE_FAILURE_RDSEED
|
---|
1676 | /* don't fallback to /dev/urandom */
|
---|
1677 | return ret;
|
---|
1678 | #else
|
---|
1679 | /* fallback to /dev/urandom attempt */
|
---|
1680 | ret = 0;
|
---|
1681 | #endif
|
---|
1682 | }
|
---|
1683 |
|
---|
1684 | #endif /* HAVE_INTEL_RDSEED */
|
---|
1685 |
|
---|
1686 | os->fd = open("/dev/urandom",O_RDONLY);
|
---|
1687 | if (os->fd == -1) {
|
---|
1688 | /* may still have /dev/random */
|
---|
1689 | os->fd = open("/dev/random",O_RDONLY);
|
---|
1690 | if (os->fd == -1)
|
---|
1691 | return OPEN_RAN_E;
|
---|
1692 | }
|
---|
1693 |
|
---|
1694 | while (sz) {
|
---|
1695 | int len = (int)read(os->fd, output, sz);
|
---|
1696 | if (len == -1) {
|
---|
1697 | ret = READ_RAN_E;
|
---|
1698 | break;
|
---|
1699 | }
|
---|
1700 |
|
---|
1701 | sz -= len;
|
---|
1702 | output += len;
|
---|
1703 |
|
---|
1704 | if (sz) {
|
---|
1705 | #ifdef BLOCKING
|
---|
1706 | sleep(0); /* context switch */
|
---|
1707 | #else
|
---|
1708 | ret = RAN_BLOCK_E;
|
---|
1709 | break;
|
---|
1710 | #endif
|
---|
1711 | }
|
---|
1712 | }
|
---|
1713 | close(os->fd);
|
---|
1714 |
|
---|
1715 | return ret;
|
---|
1716 | }
|
---|
1717 |
|
---|
1718 | #endif
|
---|
1719 |
|
---|
1720 | #ifdef USE_TEST_GENSEED
|
---|
1721 | #ifndef _MSC_VER
|
---|
1722 | #warning "write a real random seed!!!!, just for testing now"
|
---|
1723 | #else
|
---|
1724 | #pragma message("Warning: write a real random seed!!!!, just for testing now")
|
---|
1725 | #endif
|
---|
1726 |
|
---|
1727 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1728 | {
|
---|
1729 | word32 i;
|
---|
1730 | for (i = 0; i < sz; i++ )
|
---|
1731 | output[i] = i;
|
---|
1732 |
|
---|
1733 | (void)os;
|
---|
1734 |
|
---|
1735 | return 0;
|
---|
1736 | }
|
---|
1737 | #endif
|
---|
1738 |
|
---|
1739 | /* End wc_GenerateSeed */
|
---|
1740 |
|
---|
1741 | #endif /* WC_NO_RNG */
|
---|
1742 | #endif /* HAVE_FIPS */
|
---|