1 | /* random.c
|
---|
2 | *
|
---|
3 | * Copyright (C) 2006-2015 wolfSSL Inc.
|
---|
4 | *
|
---|
5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
|
---|
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 02110-1301, USA
|
---|
20 | */
|
---|
21 |
|
---|
22 | #ifdef HAVE_CONFIG_H
|
---|
23 | #include <config.h>
|
---|
24 | #endif
|
---|
25 |
|
---|
26 | #include <wolfssl/wolfcrypt/settings.h>
|
---|
27 |
|
---|
28 | /* on HPUX 11 you may need to install /dev/random see
|
---|
29 | http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I
|
---|
30 |
|
---|
31 | */
|
---|
32 |
|
---|
33 | #include <wolfssl/wolfcrypt/random.h>
|
---|
34 |
|
---|
35 | #ifdef HAVE_FIPS
|
---|
36 | int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz)
|
---|
37 | {
|
---|
38 | return GenerateSeed(os, seed, sz);
|
---|
39 | }
|
---|
40 |
|
---|
41 | #ifdef HAVE_CAVIUM
|
---|
42 | int wc_InitRngCavium(WC_RNG* rng, int i)
|
---|
43 | {
|
---|
44 | return InitRngCavium(rng, i);
|
---|
45 | }
|
---|
46 | #endif
|
---|
47 |
|
---|
48 |
|
---|
49 | int wc_InitRng(WC_RNG* rng)
|
---|
50 | {
|
---|
51 | return InitRng_fips(rng);
|
---|
52 | }
|
---|
53 |
|
---|
54 |
|
---|
55 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* b, word32 sz)
|
---|
56 | {
|
---|
57 | return RNG_GenerateBlock_fips(rng, b, sz);
|
---|
58 | }
|
---|
59 |
|
---|
60 |
|
---|
61 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
62 | {
|
---|
63 | return RNG_GenerateByte(rng, b);
|
---|
64 | }
|
---|
65 |
|
---|
66 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
|
---|
67 |
|
---|
68 | int wc_FreeRng(WC_RNG* rng)
|
---|
69 | {
|
---|
70 | return FreeRng_fips(rng);
|
---|
71 | }
|
---|
72 |
|
---|
73 |
|
---|
74 | int wc_RNG_HealthTest(int reseed,
|
---|
75 | const byte* entropyA, word32 entropyASz,
|
---|
76 | const byte* entropyB, word32 entropyBSz,
|
---|
77 | byte* output, word32 outputSz)
|
---|
78 | {
|
---|
79 | return RNG_HealthTest_fips(reseed, entropyA, entropyASz,
|
---|
80 | entropyB, entropyBSz, output, outputSz);
|
---|
81 | }
|
---|
82 | #endif /* HAVE_HASHDRBG || NO_RC4 */
|
---|
83 | #else /* else build without fips */
|
---|
84 | #include <wolfssl/wolfcrypt/error-crypt.h>
|
---|
85 |
|
---|
86 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
|
---|
87 |
|
---|
88 | #include <wolfssl/wolfcrypt/sha256.h>
|
---|
89 |
|
---|
90 | #ifdef NO_INLINE
|
---|
91 | #include <wolfssl/wolfcrypt/misc.h>
|
---|
92 | #else
|
---|
93 | #include <wolfcrypt/src/misc.c>
|
---|
94 | #endif
|
---|
95 | #endif /* HAVE_HASHDRBG || NO_RC4 */
|
---|
96 |
|
---|
97 | #if defined(USE_WINDOWS_API)
|
---|
98 | #ifndef _WIN32_WINNT
|
---|
99 | #define _WIN32_WINNT 0x0400
|
---|
100 | #endif
|
---|
101 | #include <windows.h>
|
---|
102 | #include <wincrypt.h>
|
---|
103 | #else
|
---|
104 | #if !defined(NO_DEV_RANDOM) && !defined(CUSTOM_RAND_GENERATE) && \
|
---|
105 | !defined(WOLFSSL_GENSEED_FORTEST) && !defined(WOLFSSL_MDK_ARM) && \
|
---|
106 | !defined(WOLFSSL_IAR_ARM) && !defined(WOLFSSL_ROWLEY_ARM)
|
---|
107 | //#include <fcntl.h>
|
---|
108 | #ifndef EBSNET
|
---|
109 | //#include <unistd.h>
|
---|
110 | #endif
|
---|
111 | #elif defined(FREESCALE_TRNG)
|
---|
112 | #define TRNG_INSTANCE (0)
|
---|
113 | #include "fsl_device_registers.h"
|
---|
114 | #include "fsl_trng_driver.h"
|
---|
115 | #else
|
---|
116 | /* include headers that may be needed to get good seed */
|
---|
117 | #endif
|
---|
118 | #endif /* USE_WINDOWS_API */
|
---|
119 |
|
---|
120 | #ifdef HAVE_INTEL_RDGEN
|
---|
121 | static int wc_InitRng_IntelRD(void) ;
|
---|
122 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
|
---|
123 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz) ;
|
---|
124 | #else
|
---|
125 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz) ;
|
---|
126 | #endif
|
---|
127 | static word32 cpuid_check = 0 ;
|
---|
128 | static word32 cpuid_flags = 0 ;
|
---|
129 | #define CPUID_RDRAND 0x4
|
---|
130 | #define CPUID_RDSEED 0x8
|
---|
131 | #define IS_INTEL_RDRAND (cpuid_flags&CPUID_RDRAND)
|
---|
132 | #define IS_INTEL_RDSEED (cpuid_flags&CPUID_RDSEED)
|
---|
133 | #endif
|
---|
134 |
|
---|
135 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
|
---|
136 |
|
---|
137 | /* Start NIST DRBG code */
|
---|
138 |
|
---|
139 | #define OUTPUT_BLOCK_LEN (SHA256_DIGEST_SIZE)
|
---|
140 | #define MAX_REQUEST_LEN (0x10000)
|
---|
141 | #define RESEED_INTERVAL (1000000)
|
---|
142 | #define SECURITY_STRENGTH (256)
|
---|
143 | #define ENTROPY_SZ (SECURITY_STRENGTH/8)
|
---|
144 | #define NONCE_SZ (ENTROPY_SZ/2)
|
---|
145 | #define ENTROPY_NONCE_SZ (ENTROPY_SZ+NONCE_SZ)
|
---|
146 |
|
---|
147 | /* Internal return codes */
|
---|
148 | #define DRBG_SUCCESS 0
|
---|
149 | #define DRBG_ERROR 1
|
---|
150 | #define DRBG_FAILURE 2
|
---|
151 | #define DRBG_NEED_RESEED 3
|
---|
152 | #define DRBG_CONT_FAILURE 4
|
---|
153 |
|
---|
154 | /* RNG health states */
|
---|
155 | #define DRBG_NOT_INIT 0
|
---|
156 | #define DRBG_OK 1
|
---|
157 | #define DRBG_FAILED 2
|
---|
158 | #define DRBG_CONT_FAILED 3
|
---|
159 |
|
---|
160 |
|
---|
161 | enum {
|
---|
162 | drbgInitC = 0,
|
---|
163 | drbgReseed = 1,
|
---|
164 | drbgGenerateW = 2,
|
---|
165 | drbgGenerateH = 3,
|
---|
166 | drbgInitV
|
---|
167 | };
|
---|
168 |
|
---|
169 |
|
---|
170 | typedef struct DRBG {
|
---|
171 | word32 reseedCtr;
|
---|
172 | word32 lastBlock;
|
---|
173 | byte V[DRBG_SEED_LEN];
|
---|
174 | byte C[DRBG_SEED_LEN];
|
---|
175 | byte matchCount;
|
---|
176 | } DRBG;
|
---|
177 |
|
---|
178 |
|
---|
179 | static int wc_RNG_HealthTestLocal(int reseed);
|
---|
180 |
|
---|
181 | /* Hash Derivation Function */
|
---|
182 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
183 | static int Hash_df(DRBG* drbg, byte* out, word32 outSz, byte type,
|
---|
184 | const byte* inA, word32 inASz,
|
---|
185 | const byte* inB, word32 inBSz)
|
---|
186 | {
|
---|
187 | byte ctr;
|
---|
188 | int i;
|
---|
189 | int len;
|
---|
190 | word32 bits = (outSz * 8); /* reverse byte order */
|
---|
191 | Sha256 sha;
|
---|
192 | byte digest[SHA256_DIGEST_SIZE];
|
---|
193 |
|
---|
194 | (void)drbg;
|
---|
195 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
196 | bits = ByteReverseWord32(bits);
|
---|
197 | #endif
|
---|
198 | len = (outSz / OUTPUT_BLOCK_LEN)
|
---|
199 | + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
|
---|
200 |
|
---|
201 | for (i = 0, ctr = 1; i < len; i++, ctr++)
|
---|
202 | {
|
---|
203 | if (wc_InitSha256(&sha) != 0)
|
---|
204 | return DRBG_FAILURE;
|
---|
205 |
|
---|
206 | if (wc_Sha256Update(&sha, &ctr, sizeof(ctr)) != 0)
|
---|
207 | return DRBG_FAILURE;
|
---|
208 |
|
---|
209 | if (wc_Sha256Update(&sha, (byte*)&bits, sizeof(bits)) != 0)
|
---|
210 | return DRBG_FAILURE;
|
---|
211 |
|
---|
212 | /* churning V is the only string that doesn't have the type added */
|
---|
213 | if (type != drbgInitV)
|
---|
214 | if (wc_Sha256Update(&sha, &type, sizeof(type)) != 0)
|
---|
215 | return DRBG_FAILURE;
|
---|
216 |
|
---|
217 | if (wc_Sha256Update(&sha, inA, inASz) != 0)
|
---|
218 | return DRBG_FAILURE;
|
---|
219 |
|
---|
220 | if (inB != NULL && inBSz > 0)
|
---|
221 | if (wc_Sha256Update(&sha, inB, inBSz) != 0)
|
---|
222 | return DRBG_FAILURE;
|
---|
223 |
|
---|
224 | if (wc_Sha256Final(&sha, digest) != 0)
|
---|
225 | return DRBG_FAILURE;
|
---|
226 |
|
---|
227 | if (outSz > OUTPUT_BLOCK_LEN) {
|
---|
228 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
|
---|
229 | outSz -= OUTPUT_BLOCK_LEN;
|
---|
230 | out += OUTPUT_BLOCK_LEN;
|
---|
231 | }
|
---|
232 | else {
|
---|
233 | XMEMCPY(out, digest, outSz);
|
---|
234 | }
|
---|
235 | }
|
---|
236 | ForceZero(digest, sizeof(digest));
|
---|
237 |
|
---|
238 | return DRBG_SUCCESS;
|
---|
239 | }
|
---|
240 |
|
---|
241 |
|
---|
242 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
243 | static int Hash_DRBG_Reseed(DRBG* drbg, const byte* entropy, word32 entropySz)
|
---|
244 | {
|
---|
245 | byte seed[DRBG_SEED_LEN];
|
---|
246 |
|
---|
247 | if (Hash_df(drbg, seed, sizeof(seed), drbgReseed, drbg->V, sizeof(drbg->V),
|
---|
248 | entropy, entropySz) != DRBG_SUCCESS) {
|
---|
249 | return DRBG_FAILURE;
|
---|
250 | }
|
---|
251 |
|
---|
252 | XMEMCPY(drbg->V, seed, sizeof(drbg->V));
|
---|
253 | ForceZero(seed, sizeof(seed));
|
---|
254 |
|
---|
255 | if (Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
256 | sizeof(drbg->V), NULL, 0) != DRBG_SUCCESS) {
|
---|
257 | return DRBG_FAILURE;
|
---|
258 | }
|
---|
259 |
|
---|
260 | drbg->reseedCtr = 1;
|
---|
261 | drbg->lastBlock = 0;
|
---|
262 | drbg->matchCount = 0;
|
---|
263 | return DRBG_SUCCESS;
|
---|
264 | }
|
---|
265 |
|
---|
266 | static INLINE void array_add_one(byte* data, word32 dataSz)
|
---|
267 | {
|
---|
268 | int i;
|
---|
269 |
|
---|
270 | for (i = dataSz - 1; i >= 0; i--)
|
---|
271 | {
|
---|
272 | data[i]++;
|
---|
273 | if (data[i] != 0) break;
|
---|
274 | }
|
---|
275 | }
|
---|
276 |
|
---|
277 |
|
---|
278 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
279 | static int Hash_gen(DRBG* drbg, byte* out, word32 outSz, const byte* V)
|
---|
280 | {
|
---|
281 | byte data[DRBG_SEED_LEN];
|
---|
282 | int i;
|
---|
283 | int len;
|
---|
284 | word32 checkBlock;
|
---|
285 | Sha256 sha;
|
---|
286 | byte digest[SHA256_DIGEST_SIZE];
|
---|
287 |
|
---|
288 | /* Special case: outSz is 0 and out is NULL. wc_Generate a block to save for
|
---|
289 | * the continuous test. */
|
---|
290 |
|
---|
291 | if (outSz == 0) outSz = 1;
|
---|
292 |
|
---|
293 | len = (outSz / OUTPUT_BLOCK_LEN) + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
|
---|
294 |
|
---|
295 | XMEMCPY(data, V, sizeof(data));
|
---|
296 | for (i = 0; i < len; i++) {
|
---|
297 | if (wc_InitSha256(&sha) != 0 ||
|
---|
298 | wc_Sha256Update(&sha, data, sizeof(data)) != 0 ||
|
---|
299 | wc_Sha256Final(&sha, digest) != 0) {
|
---|
300 |
|
---|
301 | return DRBG_FAILURE;
|
---|
302 | }
|
---|
303 |
|
---|
304 | XMEMCPY(&checkBlock, digest, sizeof(word32));
|
---|
305 | if (drbg->reseedCtr > 1 && checkBlock == drbg->lastBlock) {
|
---|
306 | if (drbg->matchCount == 1) {
|
---|
307 | return DRBG_CONT_FAILURE;
|
---|
308 | }
|
---|
309 | else {
|
---|
310 | if (i == len) {
|
---|
311 | len++;
|
---|
312 | }
|
---|
313 | drbg->matchCount = 1;
|
---|
314 | }
|
---|
315 | }
|
---|
316 | else {
|
---|
317 | drbg->matchCount = 0;
|
---|
318 | drbg->lastBlock = checkBlock;
|
---|
319 | }
|
---|
320 |
|
---|
321 | if (outSz >= OUTPUT_BLOCK_LEN) {
|
---|
322 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
|
---|
323 | outSz -= OUTPUT_BLOCK_LEN;
|
---|
324 | out += OUTPUT_BLOCK_LEN;
|
---|
325 | array_add_one(data, DRBG_SEED_LEN);
|
---|
326 | }
|
---|
327 | else if (out != NULL && outSz != 0) {
|
---|
328 | XMEMCPY(out, digest, outSz);
|
---|
329 | outSz = 0;
|
---|
330 | }
|
---|
331 | }
|
---|
332 | ForceZero(data, sizeof(data));
|
---|
333 |
|
---|
334 | return DRBG_SUCCESS;
|
---|
335 | }
|
---|
336 |
|
---|
337 |
|
---|
338 | static INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen)
|
---|
339 | {
|
---|
340 | word16 carry = 0;
|
---|
341 |
|
---|
342 | if (dLen > 0 && sLen > 0 && dLen >= sLen) {
|
---|
343 | int sIdx, dIdx;
|
---|
344 |
|
---|
345 | for (sIdx = sLen - 1, dIdx = dLen - 1; sIdx >= 0; dIdx--, sIdx--)
|
---|
346 | {
|
---|
347 | carry += d[dIdx] + s[sIdx];
|
---|
348 | d[dIdx] = (byte)carry;
|
---|
349 | carry >>= 8;
|
---|
350 | }
|
---|
351 |
|
---|
352 | for (; carry != 0 && dIdx >= 0; dIdx--) {
|
---|
353 | carry += d[dIdx];
|
---|
354 | d[dIdx] = (byte)carry;
|
---|
355 | carry >>= 8;
|
---|
356 | }
|
---|
357 | }
|
---|
358 | }
|
---|
359 |
|
---|
360 |
|
---|
361 | /* Returns: DRBG_SUCCESS, DRBG_NEED_RESEED, or DRBG_FAILURE */
|
---|
362 | static int Hash_DRBG_Generate(DRBG* drbg, byte* out, word32 outSz)
|
---|
363 | {
|
---|
364 | int ret = DRBG_NEED_RESEED;
|
---|
365 | Sha256 sha;
|
---|
366 | byte digest[SHA256_DIGEST_SIZE];
|
---|
367 |
|
---|
368 | if (drbg->reseedCtr != RESEED_INTERVAL) {
|
---|
369 | byte type = drbgGenerateH;
|
---|
370 | word32 reseedCtr = drbg->reseedCtr;
|
---|
371 |
|
---|
372 | ret = Hash_gen(drbg, out, outSz, drbg->V);
|
---|
373 | if (ret == DRBG_SUCCESS) {
|
---|
374 | if (wc_InitSha256(&sha) != 0 ||
|
---|
375 | wc_Sha256Update(&sha, &type, sizeof(type)) != 0 ||
|
---|
376 | wc_Sha256Update(&sha, drbg->V, sizeof(drbg->V)) != 0 ||
|
---|
377 | wc_Sha256Final(&sha, digest) != 0) {
|
---|
378 |
|
---|
379 | ret = DRBG_FAILURE;
|
---|
380 | }
|
---|
381 | else {
|
---|
382 | array_add(drbg->V, sizeof(drbg->V), digest, sizeof(digest));
|
---|
383 | array_add(drbg->V, sizeof(drbg->V), drbg->C, sizeof(drbg->C));
|
---|
384 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
385 | reseedCtr = ByteReverseWord32(reseedCtr);
|
---|
386 | #endif
|
---|
387 | array_add(drbg->V, sizeof(drbg->V),
|
---|
388 | (byte*)&reseedCtr, sizeof(reseedCtr));
|
---|
389 | ret = DRBG_SUCCESS;
|
---|
390 | }
|
---|
391 | drbg->reseedCtr++;
|
---|
392 | }
|
---|
393 | }
|
---|
394 | ForceZero(digest, sizeof(digest));
|
---|
395 |
|
---|
396 | return ret;
|
---|
397 | }
|
---|
398 |
|
---|
399 |
|
---|
400 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
401 | static int Hash_DRBG_Instantiate(DRBG* drbg, const byte* seed, word32 seedSz,
|
---|
402 | const byte* nonce, word32 nonceSz)
|
---|
403 | {
|
---|
404 | int ret = DRBG_FAILURE;
|
---|
405 |
|
---|
406 | XMEMSET(drbg, 0, sizeof(DRBG));
|
---|
407 |
|
---|
408 | if (Hash_df(drbg, drbg->V, sizeof(drbg->V), drbgInitV, seed, seedSz,
|
---|
409 | nonce, nonceSz) == DRBG_SUCCESS &&
|
---|
410 | Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
411 | sizeof(drbg->V), NULL, 0) == DRBG_SUCCESS) {
|
---|
412 |
|
---|
413 | drbg->reseedCtr = 1;
|
---|
414 | drbg->lastBlock = 0;
|
---|
415 | drbg->matchCount = 0;
|
---|
416 | ret = DRBG_SUCCESS;
|
---|
417 | }
|
---|
418 |
|
---|
419 | return ret;
|
---|
420 | }
|
---|
421 |
|
---|
422 |
|
---|
423 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
424 | static int Hash_DRBG_Uninstantiate(DRBG* drbg)
|
---|
425 | {
|
---|
426 | word32 i;
|
---|
427 | int compareSum = 0;
|
---|
428 | byte* compareDrbg = (byte*)drbg;
|
---|
429 |
|
---|
430 | ForceZero(drbg, sizeof(DRBG));
|
---|
431 |
|
---|
432 | for (i = 0; i < sizeof(DRBG); i++)
|
---|
433 | compareSum |= compareDrbg[i] ^ 0;
|
---|
434 |
|
---|
435 | return (compareSum == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
436 | }
|
---|
437 |
|
---|
438 | /* End NIST DRBG Code */
|
---|
439 |
|
---|
440 |
|
---|
441 | /* Get seed and key cipher */
|
---|
442 | int wc_InitRng(WC_RNG* rng)
|
---|
443 | {
|
---|
444 | int ret = BAD_FUNC_ARG;
|
---|
445 |
|
---|
446 | if (rng != NULL) {
|
---|
447 | if (wc_RNG_HealthTestLocal(0) == 0) {
|
---|
448 | byte entropy[ENTROPY_NONCE_SZ];
|
---|
449 |
|
---|
450 | rng->drbg =
|
---|
451 | (struct DRBG*)XMALLOC(sizeof(DRBG), NULL, DYNAMIC_TYPE_RNG);
|
---|
452 | if (rng->drbg == NULL) {
|
---|
453 | ret = MEMORY_E;
|
---|
454 | }
|
---|
455 | /* This doesn't use a separate nonce. The entropy input will be
|
---|
456 | * the default size plus the size of the nonce making the seed
|
---|
457 | * size. */
|
---|
458 | else if (wc_GenerateSeed(&rng->seed,
|
---|
459 | entropy, ENTROPY_NONCE_SZ) == 0 &&
|
---|
460 | Hash_DRBG_Instantiate(rng->drbg,
|
---|
461 | entropy, ENTROPY_NONCE_SZ, NULL, 0) == DRBG_SUCCESS) {
|
---|
462 |
|
---|
463 | ret = Hash_DRBG_Generate(rng->drbg, NULL, 0);
|
---|
464 | }
|
---|
465 | else
|
---|
466 | ret = DRBG_FAILURE;
|
---|
467 |
|
---|
468 | ForceZero(entropy, ENTROPY_NONCE_SZ);
|
---|
469 | }
|
---|
470 | else
|
---|
471 | ret = DRBG_CONT_FAILURE;
|
---|
472 |
|
---|
473 | if (ret == DRBG_SUCCESS) {
|
---|
474 | rng->status = DRBG_OK;
|
---|
475 | ret = 0;
|
---|
476 | }
|
---|
477 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
478 | rng->status = DRBG_CONT_FAILED;
|
---|
479 | ret = DRBG_CONT_FIPS_E;
|
---|
480 | }
|
---|
481 | else if (ret == DRBG_FAILURE) {
|
---|
482 | rng->status = DRBG_FAILED;
|
---|
483 | ret = RNG_FAILURE_E;
|
---|
484 | }
|
---|
485 | else {
|
---|
486 | rng->status = DRBG_FAILED;
|
---|
487 | }
|
---|
488 | }
|
---|
489 |
|
---|
490 | return ret;
|
---|
491 | }
|
---|
492 |
|
---|
493 |
|
---|
494 | /* place a generated block in output */
|
---|
495 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
|
---|
496 | {
|
---|
497 | int ret;
|
---|
498 |
|
---|
499 | if (rng == NULL || output == NULL || sz > MAX_REQUEST_LEN)
|
---|
500 | return BAD_FUNC_ARG;
|
---|
501 |
|
---|
502 | if (rng->status != DRBG_OK)
|
---|
503 | return RNG_FAILURE_E;
|
---|
504 |
|
---|
505 | ret = Hash_DRBG_Generate(rng->drbg, output, sz);
|
---|
506 |
|
---|
507 | if (ret == DRBG_NEED_RESEED) {
|
---|
508 | if (wc_RNG_HealthTestLocal(1) == 0) {
|
---|
509 | byte entropy[ENTROPY_SZ];
|
---|
510 |
|
---|
511 | if (wc_GenerateSeed(&rng->seed, entropy, ENTROPY_SZ) == 0 &&
|
---|
512 | Hash_DRBG_Reseed(rng->drbg, entropy, ENTROPY_SZ)
|
---|
513 | == DRBG_SUCCESS) {
|
---|
514 |
|
---|
515 | ret = Hash_DRBG_Generate(rng->drbg, NULL, 0);
|
---|
516 | if (ret == DRBG_SUCCESS)
|
---|
517 | ret = Hash_DRBG_Generate(rng->drbg, output, sz);
|
---|
518 | }
|
---|
519 | else
|
---|
520 | ret = DRBG_FAILURE;
|
---|
521 |
|
---|
522 | ForceZero(entropy, ENTROPY_SZ);
|
---|
523 | }
|
---|
524 | else
|
---|
525 | ret = DRBG_CONT_FAILURE;
|
---|
526 | }
|
---|
527 |
|
---|
528 | if (ret == DRBG_SUCCESS) {
|
---|
529 | ret = 0;
|
---|
530 | }
|
---|
531 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
532 | ret = DRBG_CONT_FIPS_E;
|
---|
533 | rng->status = DRBG_CONT_FAILED;
|
---|
534 | }
|
---|
535 | else {
|
---|
536 | ret = RNG_FAILURE_E;
|
---|
537 | rng->status = DRBG_FAILED;
|
---|
538 | }
|
---|
539 |
|
---|
540 | return ret;
|
---|
541 | }
|
---|
542 |
|
---|
543 |
|
---|
544 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
545 | {
|
---|
546 | return wc_RNG_GenerateBlock(rng, b, 1);
|
---|
547 | }
|
---|
548 |
|
---|
549 |
|
---|
550 | int wc_FreeRng(WC_RNG* rng)
|
---|
551 | {
|
---|
552 | int ret = BAD_FUNC_ARG;
|
---|
553 |
|
---|
554 | if (rng != NULL) {
|
---|
555 | if (rng->drbg != NULL) {
|
---|
556 | if (Hash_DRBG_Uninstantiate(rng->drbg) == DRBG_SUCCESS)
|
---|
557 | ret = 0;
|
---|
558 | else
|
---|
559 | ret = RNG_FAILURE_E;
|
---|
560 |
|
---|
561 | XFREE(rng->drbg, NULL, DYNAMIC_TYPE_RNG);
|
---|
562 | rng->drbg = NULL;
|
---|
563 | }
|
---|
564 |
|
---|
565 | rng->status = DRBG_NOT_INIT;
|
---|
566 | }
|
---|
567 |
|
---|
568 | return ret;
|
---|
569 | }
|
---|
570 |
|
---|
571 |
|
---|
572 | int wc_RNG_HealthTest(int reseed, const byte* entropyA, word32 entropyASz,
|
---|
573 | const byte* entropyB, word32 entropyBSz,
|
---|
574 | byte* output, word32 outputSz)
|
---|
575 | {
|
---|
576 | DRBG drbg;
|
---|
577 |
|
---|
578 | if (entropyA == NULL || output == NULL)
|
---|
579 | return BAD_FUNC_ARG;
|
---|
580 |
|
---|
581 | if (reseed != 0 && entropyB == NULL)
|
---|
582 | return BAD_FUNC_ARG;
|
---|
583 |
|
---|
584 | if (outputSz != (SHA256_DIGEST_SIZE * 4))
|
---|
585 | return -1;
|
---|
586 |
|
---|
587 | if (Hash_DRBG_Instantiate(&drbg, entropyA, entropyASz, NULL, 0) != 0)
|
---|
588 | return -1;
|
---|
589 |
|
---|
590 | if (reseed) {
|
---|
591 | if (Hash_DRBG_Reseed(&drbg, entropyB, entropyBSz) != 0) {
|
---|
592 | Hash_DRBG_Uninstantiate(&drbg);
|
---|
593 | return -1;
|
---|
594 | }
|
---|
595 | }
|
---|
596 |
|
---|
597 | if (Hash_DRBG_Generate(&drbg, output, outputSz) != 0) {
|
---|
598 | Hash_DRBG_Uninstantiate(&drbg);
|
---|
599 | return -1;
|
---|
600 | }
|
---|
601 |
|
---|
602 | if (Hash_DRBG_Generate(&drbg, output, outputSz) != 0) {
|
---|
603 | Hash_DRBG_Uninstantiate(&drbg);
|
---|
604 | return -1;
|
---|
605 | }
|
---|
606 |
|
---|
607 | if (Hash_DRBG_Uninstantiate(&drbg) != 0) {
|
---|
608 | return -1;
|
---|
609 | }
|
---|
610 |
|
---|
611 | return 0;
|
---|
612 | }
|
---|
613 |
|
---|
614 |
|
---|
615 | const byte entropyA[] = {
|
---|
616 | 0x63, 0x36, 0x33, 0x77, 0xe4, 0x1e, 0x86, 0x46, 0x8d, 0xeb, 0x0a, 0xb4,
|
---|
617 | 0xa8, 0xed, 0x68, 0x3f, 0x6a, 0x13, 0x4e, 0x47, 0xe0, 0x14, 0xc7, 0x00,
|
---|
618 | 0x45, 0x4e, 0x81, 0xe9, 0x53, 0x58, 0xa5, 0x69, 0x80, 0x8a, 0xa3, 0x8f,
|
---|
619 | 0x2a, 0x72, 0xa6, 0x23, 0x59, 0x91, 0x5a, 0x9f, 0x8a, 0x04, 0xca, 0x68
|
---|
620 | };
|
---|
621 |
|
---|
622 | const byte reseedEntropyA[] = {
|
---|
623 | 0xe6, 0x2b, 0x8a, 0x8e, 0xe8, 0xf1, 0x41, 0xb6, 0x98, 0x05, 0x66, 0xe3,
|
---|
624 | 0xbf, 0xe3, 0xc0, 0x49, 0x03, 0xda, 0xd4, 0xac, 0x2c, 0xdf, 0x9f, 0x22,
|
---|
625 | 0x80, 0x01, 0x0a, 0x67, 0x39, 0xbc, 0x83, 0xd3
|
---|
626 | };
|
---|
627 |
|
---|
628 | const byte outputA[] = {
|
---|
629 | 0x04, 0xee, 0xc6, 0x3b, 0xb2, 0x31, 0xdf, 0x2c, 0x63, 0x0a, 0x1a, 0xfb,
|
---|
630 | 0xe7, 0x24, 0x94, 0x9d, 0x00, 0x5a, 0x58, 0x78, 0x51, 0xe1, 0xaa, 0x79,
|
---|
631 | 0x5e, 0x47, 0x73, 0x47, 0xc8, 0xb0, 0x56, 0x62, 0x1c, 0x18, 0xbd, 0xdc,
|
---|
632 | 0xdd, 0x8d, 0x99, 0xfc, 0x5f, 0xc2, 0xb9, 0x20, 0x53, 0xd8, 0xcf, 0xac,
|
---|
633 | 0xfb, 0x0b, 0xb8, 0x83, 0x12, 0x05, 0xfa, 0xd1, 0xdd, 0xd6, 0xc0, 0x71,
|
---|
634 | 0x31, 0x8a, 0x60, 0x18, 0xf0, 0x3b, 0x73, 0xf5, 0xed, 0xe4, 0xd4, 0xd0,
|
---|
635 | 0x71, 0xf9, 0xde, 0x03, 0xfd, 0x7a, 0xea, 0x10, 0x5d, 0x92, 0x99, 0xb8,
|
---|
636 | 0xaf, 0x99, 0xaa, 0x07, 0x5b, 0xdb, 0x4d, 0xb9, 0xaa, 0x28, 0xc1, 0x8d,
|
---|
637 | 0x17, 0x4b, 0x56, 0xee, 0x2a, 0x01, 0x4d, 0x09, 0x88, 0x96, 0xff, 0x22,
|
---|
638 | 0x82, 0xc9, 0x55, 0xa8, 0x19, 0x69, 0xe0, 0x69, 0xfa, 0x8c, 0xe0, 0x07,
|
---|
639 | 0xa1, 0x80, 0x18, 0x3a, 0x07, 0xdf, 0xae, 0x17
|
---|
640 | };
|
---|
641 |
|
---|
642 | const byte entropyB[] = {
|
---|
643 | 0xa6, 0x5a, 0xd0, 0xf3, 0x45, 0xdb, 0x4e, 0x0e, 0xff, 0xe8, 0x75, 0xc3,
|
---|
644 | 0xa2, 0xe7, 0x1f, 0x42, 0xc7, 0x12, 0x9d, 0x62, 0x0f, 0xf5, 0xc1, 0x19,
|
---|
645 | 0xa9, 0xef, 0x55, 0xf0, 0x51, 0x85, 0xe0, 0xfb, 0x85, 0x81, 0xf9, 0x31,
|
---|
646 | 0x75, 0x17, 0x27, 0x6e, 0x06, 0xe9, 0x60, 0x7d, 0xdb, 0xcb, 0xcc, 0x2e
|
---|
647 | };
|
---|
648 |
|
---|
649 | const byte outputB[] = {
|
---|
650 | 0xd3, 0xe1, 0x60, 0xc3, 0x5b, 0x99, 0xf3, 0x40, 0xb2, 0x62, 0x82, 0x64,
|
---|
651 | 0xd1, 0x75, 0x10, 0x60, 0xe0, 0x04, 0x5d, 0xa3, 0x83, 0xff, 0x57, 0xa5,
|
---|
652 | 0x7d, 0x73, 0xa6, 0x73, 0xd2, 0xb8, 0xd8, 0x0d, 0xaa, 0xf6, 0xa6, 0xc3,
|
---|
653 | 0x5a, 0x91, 0xbb, 0x45, 0x79, 0xd7, 0x3f, 0xd0, 0xc8, 0xfe, 0xd1, 0x11,
|
---|
654 | 0xb0, 0x39, 0x13, 0x06, 0x82, 0x8a, 0xdf, 0xed, 0x52, 0x8f, 0x01, 0x81,
|
---|
655 | 0x21, 0xb3, 0xfe, 0xbd, 0xc3, 0x43, 0xe7, 0x97, 0xb8, 0x7d, 0xbb, 0x63,
|
---|
656 | 0xdb, 0x13, 0x33, 0xde, 0xd9, 0xd1, 0xec, 0xe1, 0x77, 0xcf, 0xa6, 0xb7,
|
---|
657 | 0x1f, 0xe8, 0xab, 0x1d, 0xa4, 0x66, 0x24, 0xed, 0x64, 0x15, 0xe5, 0x1c,
|
---|
658 | 0xcd, 0xe2, 0xc7, 0xca, 0x86, 0xe2, 0x83, 0x99, 0x0e, 0xea, 0xeb, 0x91,
|
---|
659 | 0x12, 0x04, 0x15, 0x52, 0x8b, 0x22, 0x95, 0x91, 0x02, 0x81, 0xb0, 0x2d,
|
---|
660 | 0xd4, 0x31, 0xf4, 0xc9, 0xf7, 0x04, 0x27, 0xdf
|
---|
661 | };
|
---|
662 |
|
---|
663 |
|
---|
664 | static int wc_RNG_HealthTestLocal(int reseed)
|
---|
665 | {
|
---|
666 | int ret = 0;
|
---|
667 | byte check[SHA256_DIGEST_SIZE * 4];
|
---|
668 |
|
---|
669 | if (reseed) {
|
---|
670 | ret = wc_RNG_HealthTest(1, entropyA, sizeof(entropyA),
|
---|
671 | reseedEntropyA, sizeof(reseedEntropyA),
|
---|
672 | check, sizeof(check));
|
---|
673 | if (ret == 0) {
|
---|
674 | if (ConstantCompare(check, outputA, sizeof(check)) != 0)
|
---|
675 | ret = -1;
|
---|
676 | }
|
---|
677 | }
|
---|
678 | else {
|
---|
679 | ret = wc_RNG_HealthTest(0, entropyB, sizeof(entropyB),
|
---|
680 | NULL, 0,
|
---|
681 | check, sizeof(check));
|
---|
682 | if (ret == 0) {
|
---|
683 | if (ConstantCompare(check, outputB, sizeof(check)) != 0)
|
---|
684 | ret = -1;
|
---|
685 | }
|
---|
686 | }
|
---|
687 |
|
---|
688 | return ret;
|
---|
689 | }
|
---|
690 |
|
---|
691 |
|
---|
692 | #else /* HAVE_HASHDRBG || NO_RC4 */
|
---|
693 |
|
---|
694 | /* Get seed and key cipher */
|
---|
695 | int wc_InitRng(WC_RNG* rng)
|
---|
696 | {
|
---|
697 | int ret;
|
---|
698 | #ifdef WOLFSSL_SMALL_STACK
|
---|
699 | byte* key;
|
---|
700 | byte* junk;
|
---|
701 | #else
|
---|
702 | byte key[32];
|
---|
703 | byte junk[256];
|
---|
704 | #endif
|
---|
705 |
|
---|
706 | #ifdef HAVE_INTEL_RDGEN
|
---|
707 | wc_InitRng_IntelRD() ;
|
---|
708 | if(IS_INTEL_RDRAND)return 0 ;
|
---|
709 | #endif
|
---|
710 | #ifdef HAVE_CAVIUM
|
---|
711 | if (rng->magic == WOLFSSL_RNG_CAVIUM_MAGIC)
|
---|
712 | return 0;
|
---|
713 | #endif
|
---|
714 |
|
---|
715 | #ifdef WOLFSSL_SMALL_STACK
|
---|
716 | key = (byte*)XMALLOC(32, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
717 | if (key == NULL)
|
---|
718 | return MEMORY_E;
|
---|
719 |
|
---|
720 | junk = (byte*)XMALLOC(256, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
721 | if (junk == NULL) {
|
---|
722 | XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
723 | return MEMORY_E;
|
---|
724 | }
|
---|
725 | #endif
|
---|
726 |
|
---|
727 | ret = wc_GenerateSeed(&rng->seed, key, 32);
|
---|
728 |
|
---|
729 | if (ret == 0) {
|
---|
730 | wc_Arc4SetKey(&rng->cipher, key, sizeof(key));
|
---|
731 |
|
---|
732 | ret = wc_RNG_GenerateBlock(rng, junk, 256); /*rid initial state*/
|
---|
733 | }
|
---|
734 |
|
---|
735 | #ifdef WOLFSSL_SMALL_STACK
|
---|
736 | XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
737 | XFREE(junk, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
738 | #endif
|
---|
739 |
|
---|
740 | return ret;
|
---|
741 | }
|
---|
742 |
|
---|
743 | #ifdef HAVE_CAVIUM
|
---|
744 | static void CaviumRNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz);
|
---|
745 | #endif
|
---|
746 |
|
---|
747 | /* place a generated block in output */
|
---|
748 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
|
---|
749 | {
|
---|
750 | #ifdef HAVE_INTEL_RDGEN
|
---|
751 | if(IS_INTEL_RDRAND)
|
---|
752 | return wc_GenerateRand_IntelRD(NULL, output, sz) ;
|
---|
753 | #endif
|
---|
754 | #ifdef HAVE_CAVIUM
|
---|
755 | if (rng->magic == WOLFSSL_RNG_CAVIUM_MAGIC)
|
---|
756 | return CaviumRNG_GenerateBlock(rng, output, sz);
|
---|
757 | #endif
|
---|
758 | XMEMSET(output, 0, sz);
|
---|
759 | wc_Arc4Process(&rng->cipher, output, output, sz);
|
---|
760 |
|
---|
761 | return 0;
|
---|
762 | }
|
---|
763 |
|
---|
764 |
|
---|
765 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
766 | {
|
---|
767 | return wc_RNG_GenerateBlock(rng, b, 1);
|
---|
768 | }
|
---|
769 |
|
---|
770 |
|
---|
771 | int wc_FreeRng(WC_RNG* rng)
|
---|
772 | {
|
---|
773 | (void)rng;
|
---|
774 | return 0;
|
---|
775 | }
|
---|
776 |
|
---|
777 |
|
---|
778 | #ifdef HAVE_CAVIUM
|
---|
779 |
|
---|
780 | #include <wolfssl/ctaocrypt/logging.h>
|
---|
781 | #include "cavium_common.h"
|
---|
782 |
|
---|
783 | /* Initiliaze RNG for use with Nitrox device */
|
---|
784 | int wc_InitRngCavium(WC_RNG* rng, int devId)
|
---|
785 | {
|
---|
786 | if (rng == NULL)
|
---|
787 | return -1;
|
---|
788 |
|
---|
789 | rng->devId = devId;
|
---|
790 | rng->magic = WOLFSSL_RNG_CAVIUM_MAGIC;
|
---|
791 |
|
---|
792 | return 0;
|
---|
793 | }
|
---|
794 |
|
---|
795 |
|
---|
796 | static void CaviumRNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
|
---|
797 | {
|
---|
798 | wolfssl_word offset = 0;
|
---|
799 | word32 requestId;
|
---|
800 |
|
---|
801 | while (sz > WOLFSSL_MAX_16BIT) {
|
---|
802 | word16 slen = (word16)WOLFSSL_MAX_16BIT;
|
---|
803 | if (CspRandom(CAVIUM_BLOCKING, slen, output + offset, &requestId,
|
---|
804 | rng->devId) != 0) {
|
---|
805 | WOLFSSL_MSG("Cavium RNG failed");
|
---|
806 | }
|
---|
807 | sz -= WOLFSSL_MAX_16BIT;
|
---|
808 | offset += WOLFSSL_MAX_16BIT;
|
---|
809 | }
|
---|
810 | if (sz) {
|
---|
811 | word16 slen = (word16)sz;
|
---|
812 | if (CspRandom(CAVIUM_BLOCKING, slen, output + offset, &requestId,
|
---|
813 | rng->devId) != 0) {
|
---|
814 | WOLFSSL_MSG("Cavium RNG failed");
|
---|
815 | }
|
---|
816 | }
|
---|
817 | }
|
---|
818 |
|
---|
819 | #endif /* HAVE_CAVIUM */
|
---|
820 |
|
---|
821 | #endif /* HAVE_HASHDRBG || NO_RC4 */
|
---|
822 |
|
---|
823 |
|
---|
824 | #if defined(HAVE_INTEL_RDGEN)
|
---|
825 |
|
---|
826 | #ifndef _MSC_VER
|
---|
827 | #define cpuid(reg, leaf, sub)\
|
---|
828 | __asm__ __volatile__ ("cpuid":\
|
---|
829 | "=a" (reg[0]), "=b" (reg[1]), "=c" (reg[2]), "=d" (reg[3]) :\
|
---|
830 | "a" (leaf), "c"(sub));
|
---|
831 |
|
---|
832 | #define XASM_LINK(f) asm(f)
|
---|
833 | #else
|
---|
834 |
|
---|
835 | #include <intrin.h>
|
---|
836 | #define cpuid(a,b) __cpuid((int*)a,b)
|
---|
837 |
|
---|
838 | #define XASM_LINK(f)
|
---|
839 |
|
---|
840 | #endif /* _MSC_VER */
|
---|
841 |
|
---|
842 | #define EAX 0
|
---|
843 | #define EBX 1
|
---|
844 | #define ECX 2
|
---|
845 | #define EDX 3
|
---|
846 |
|
---|
847 | static word32 cpuid_flag(word32 leaf, word32 sub, word32 num, word32 bit) {
|
---|
848 | int got_intel_cpu=0;
|
---|
849 | unsigned int reg[5];
|
---|
850 |
|
---|
851 | reg[4] = '\0' ;
|
---|
852 | cpuid(reg, 0, 0);
|
---|
853 | if(memcmp((char *)&(reg[EBX]), "Genu", 4) == 0 &&
|
---|
854 | memcmp((char *)&(reg[EDX]), "ineI", 4) == 0 &&
|
---|
855 | memcmp((char *)&(reg[ECX]), "ntel", 4) == 0) {
|
---|
856 | got_intel_cpu = 1;
|
---|
857 | }
|
---|
858 | if (got_intel_cpu) {
|
---|
859 | cpuid(reg, leaf, sub);
|
---|
860 | return((reg[num]>>bit)&0x1) ;
|
---|
861 | }
|
---|
862 | return 0 ;
|
---|
863 | }
|
---|
864 |
|
---|
865 | static int wc_InitRng_IntelRD()
|
---|
866 | {
|
---|
867 | if(cpuid_check==0) {
|
---|
868 | if(cpuid_flag(1, 0, ECX, 30)){ cpuid_flags |= CPUID_RDRAND ;}
|
---|
869 | if(cpuid_flag(7, 0, EBX, 18)){ cpuid_flags |= CPUID_RDSEED ;}
|
---|
870 | cpuid_check = 1 ;
|
---|
871 | }
|
---|
872 | return 1 ;
|
---|
873 | }
|
---|
874 |
|
---|
875 | #define INTELRD_RETRY 10
|
---|
876 |
|
---|
877 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
|
---|
878 |
|
---|
879 | /* return 0 on success */
|
---|
880 | static INLINE int IntelRDseed32(unsigned int *seed)
|
---|
881 | {
|
---|
882 | int rdseed; unsigned char ok ;
|
---|
883 |
|
---|
884 | __asm__ volatile("rdseed %0; setc %1":"=r"(rdseed), "=qm"(ok));
|
---|
885 | if(ok){
|
---|
886 | *seed = rdseed ;
|
---|
887 | return 0 ;
|
---|
888 | } else
|
---|
889 | return 1;
|
---|
890 | }
|
---|
891 |
|
---|
892 | /* return 0 on success */
|
---|
893 | static INLINE int IntelRDseed32_r(unsigned int *rnd)
|
---|
894 | {
|
---|
895 | int i ;
|
---|
896 | for(i=0; i<INTELRD_RETRY;i++) {
|
---|
897 | if(IntelRDseed32(rnd) == 0) return 0 ;
|
---|
898 | }
|
---|
899 | return 1 ;
|
---|
900 | }
|
---|
901 |
|
---|
902 | /* return 0 on success */
|
---|
903 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
904 | {
|
---|
905 | (void) os ;
|
---|
906 | int ret ;
|
---|
907 | unsigned int rndTmp ;
|
---|
908 |
|
---|
909 | for( ; sz/4 > 0; sz-=4, output+=4) {
|
---|
910 | if(IS_INTEL_RDSEED)ret = IntelRDseed32_r((word32 *)output) ;
|
---|
911 | else return 1 ;
|
---|
912 | if(ret)
|
---|
913 | return 1 ;
|
---|
914 | }
|
---|
915 | if(sz == 0)return 0 ;
|
---|
916 |
|
---|
917 | if(IS_INTEL_RDSEED)ret = IntelRDseed32_r(&rndTmp) ;
|
---|
918 | else return 1 ;
|
---|
919 | if(ret)
|
---|
920 | return 1 ;
|
---|
921 | XMEMCPY(output, &rndTmp, sz) ;
|
---|
922 | return 0;
|
---|
923 | }
|
---|
924 |
|
---|
925 | #else
|
---|
926 |
|
---|
927 | /* return 0 on success */
|
---|
928 | static INLINE int IntelRDrand32(unsigned int *rnd)
|
---|
929 | {
|
---|
930 | int rdrand; unsigned char ok ;
|
---|
931 | __asm__ volatile("rdrand %0; setc %1":"=r"(rdrand), "=qm"(ok));
|
---|
932 | if(ok){
|
---|
933 | *rnd = rdrand;
|
---|
934 | return 0 ;
|
---|
935 | } else
|
---|
936 | return 1;
|
---|
937 | }
|
---|
938 |
|
---|
939 | /* return 0 on success */
|
---|
940 | static INLINE int IntelRDrand32_r(unsigned int *rnd)
|
---|
941 | {
|
---|
942 | int i ;
|
---|
943 | for(i=0; i<INTELRD_RETRY;i++) {
|
---|
944 | if(IntelRDrand32(rnd) == 0) return 0 ;
|
---|
945 | }
|
---|
946 | return 1 ;
|
---|
947 | }
|
---|
948 |
|
---|
949 | /* return 0 on success */
|
---|
950 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
951 | {
|
---|
952 | (void) os ;
|
---|
953 | int ret ;
|
---|
954 | unsigned int rndTmp;
|
---|
955 |
|
---|
956 | for( ; sz/4 > 0; sz-=4, output+=4) {
|
---|
957 | if(IS_INTEL_RDRAND)ret = IntelRDrand32_r((word32 *)output);
|
---|
958 | else return 1 ;
|
---|
959 | if(ret)
|
---|
960 | return 1 ;
|
---|
961 | }
|
---|
962 | if(sz == 0)return 0 ;
|
---|
963 |
|
---|
964 | if(IS_INTEL_RDRAND)ret = IntelRDrand32_r(&rndTmp);
|
---|
965 | else return 1 ;
|
---|
966 | if(ret)
|
---|
967 | return 1 ;
|
---|
968 | XMEMCPY(output, &rndTmp, sz) ;
|
---|
969 | return 0;
|
---|
970 | }
|
---|
971 | #endif /* defined(HAVE_HASHDRBG) || defined(NO_RC4) */
|
---|
972 |
|
---|
973 | #endif /* HAVE_INTEL_RDGEN */
|
---|
974 |
|
---|
975 |
|
---|
976 | #if defined(USE_WINDOWS_API)
|
---|
977 |
|
---|
978 |
|
---|
979 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
980 | {
|
---|
981 | if(!CryptAcquireContext(&os->handle, 0, 0, PROV_RSA_FULL,
|
---|
982 | CRYPT_VERIFYCONTEXT))
|
---|
983 | return WINCRYPT_E;
|
---|
984 |
|
---|
985 | if (!CryptGenRandom(os->handle, sz, output))
|
---|
986 | return CRYPTGEN_E;
|
---|
987 |
|
---|
988 | CryptReleaseContext(os->handle, 0);
|
---|
989 |
|
---|
990 | return 0;
|
---|
991 | }
|
---|
992 |
|
---|
993 |
|
---|
994 | #elif defined(HAVE_RTP_SYS) || defined(EBSNET)
|
---|
995 |
|
---|
996 | #include "rtprand.h" /* rtp_rand () */
|
---|
997 | #include "rtptime.h" /* rtp_get_system_msec() */
|
---|
998 |
|
---|
999 |
|
---|
1000 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1001 | {
|
---|
1002 | int i;
|
---|
1003 | rtp_srand(rtp_get_system_msec());
|
---|
1004 |
|
---|
1005 | for (i = 0; i < sz; i++ ) {
|
---|
1006 | output[i] = rtp_rand() % 256;
|
---|
1007 | if ( (i % 8) == 7)
|
---|
1008 | rtp_srand(rtp_get_system_msec());
|
---|
1009 | }
|
---|
1010 |
|
---|
1011 | return 0;
|
---|
1012 | }
|
---|
1013 |
|
---|
1014 |
|
---|
1015 | #elif defined(MICRIUM)
|
---|
1016 |
|
---|
1017 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1018 | {
|
---|
1019 | #if (NET_SECURE_MGR_CFG_EN == DEF_ENABLED)
|
---|
1020 | NetSecure_InitSeed(output, sz);
|
---|
1021 | #endif
|
---|
1022 | return 0;
|
---|
1023 | }
|
---|
1024 |
|
---|
1025 | #elif defined(MICROCHIP_PIC32)
|
---|
1026 |
|
---|
1027 | #ifdef MICROCHIP_MPLAB_HARMONY
|
---|
1028 | #define PIC32_SEED_COUNT _CP0_GET_COUNT
|
---|
1029 | #else
|
---|
1030 | #if !defined(WOLFSSL_MICROCHIP_PIC32MZ)
|
---|
1031 | #include <peripheral/timer.h>
|
---|
1032 | #endif
|
---|
1033 | #define PIC32_SEED_COUNT ReadCoreTimer
|
---|
1034 | #endif
|
---|
1035 | #ifdef WOLFSSL_MIC32MZ_RNG
|
---|
1036 | #include "xc.h"
|
---|
1037 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1038 | {
|
---|
1039 | int i ;
|
---|
1040 | byte rnd[8] ;
|
---|
1041 | word32 *rnd32 = (word32 *)rnd ;
|
---|
1042 | word32 size = sz ;
|
---|
1043 | byte* op = output ;
|
---|
1044 |
|
---|
1045 | /* This part has to be replaced with better random seed */
|
---|
1046 | RNGNUMGEN1 = ReadCoreTimer();
|
---|
1047 | RNGPOLY1 = ReadCoreTimer();
|
---|
1048 | RNGPOLY2 = ReadCoreTimer();
|
---|
1049 | RNGNUMGEN2 = ReadCoreTimer();
|
---|
1050 | #ifdef DEBUG_WOLFSSL
|
---|
1051 | printf("GenerateSeed::Seed=%08x, %08x\n", RNGNUMGEN1, RNGNUMGEN2) ;
|
---|
1052 | #endif
|
---|
1053 | RNGCONbits.PLEN = 0x40;
|
---|
1054 | RNGCONbits.PRNGEN = 1;
|
---|
1055 | for(i=0; i<5; i++) { /* wait for RNGNUMGEN ready */
|
---|
1056 | volatile int x ;
|
---|
1057 | x = RNGNUMGEN1 ;
|
---|
1058 | x = RNGNUMGEN2 ;
|
---|
1059 | }
|
---|
1060 | do {
|
---|
1061 | rnd32[0] = RNGNUMGEN1;
|
---|
1062 | rnd32[1] = RNGNUMGEN2;
|
---|
1063 |
|
---|
1064 | for(i=0; i<8; i++, op++) {
|
---|
1065 | *op = rnd[i] ;
|
---|
1066 | size -- ;
|
---|
1067 | if(size==0)break ;
|
---|
1068 | }
|
---|
1069 | } while(size) ;
|
---|
1070 | return 0;
|
---|
1071 | }
|
---|
1072 | #else /* WOLFSSL_MIC32MZ_RNG */
|
---|
1073 | /* uses the core timer, in nanoseconds to seed srand */
|
---|
1074 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1075 | {
|
---|
1076 | int i;
|
---|
1077 | srand(PIC32_SEED_COUNT() * 25);
|
---|
1078 |
|
---|
1079 | for (i = 0; i < sz; i++ ) {
|
---|
1080 | output[i] = rand() % 256;
|
---|
1081 | if ( (i % 8) == 7)
|
---|
1082 | srand(PIC32_SEED_COUNT() * 25);
|
---|
1083 | }
|
---|
1084 | return 0;
|
---|
1085 | }
|
---|
1086 | #endif /* WOLFSSL_MIC32MZ_RNG */
|
---|
1087 |
|
---|
1088 | #elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) || \
|
---|
1089 | defined(FREESCALE_KSDK_BM) || defined(FREESCALE_FREE_RTOS)
|
---|
1090 |
|
---|
1091 | #ifdef FREESCALE_K70_RNGA
|
---|
1092 | /*
|
---|
1093 | * wc_Generates a RNG seed using the Random Number Generator Accelerator
|
---|
1094 | * on the Kinetis K70. Documentation located in Chapter 37 of
|
---|
1095 | * K70 Sub-Family Reference Manual (see Note 3 in the README for link).
|
---|
1096 | */
|
---|
1097 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1098 | {
|
---|
1099 | int i;
|
---|
1100 |
|
---|
1101 | /* turn on RNGA module */
|
---|
1102 | SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK;
|
---|
1103 |
|
---|
1104 | /* set SLP bit to 0 - "RNGA is not in sleep mode" */
|
---|
1105 | RNG_CR &= ~RNG_CR_SLP_MASK;
|
---|
1106 |
|
---|
1107 | /* set HA bit to 1 - "security violations masked" */
|
---|
1108 | RNG_CR |= RNG_CR_HA_MASK;
|
---|
1109 |
|
---|
1110 | /* set GO bit to 1 - "output register loaded with data" */
|
---|
1111 | RNG_CR |= RNG_CR_GO_MASK;
|
---|
1112 |
|
---|
1113 | for (i = 0; i < sz; i++) {
|
---|
1114 |
|
---|
1115 | /* wait for RNG FIFO to be full */
|
---|
1116 | while((RNG_SR & RNG_SR_OREG_LVL(0xF)) == 0) {}
|
---|
1117 |
|
---|
1118 | /* get value */
|
---|
1119 | output[i] = RNG_OR;
|
---|
1120 | }
|
---|
1121 |
|
---|
1122 | return 0;
|
---|
1123 | }
|
---|
1124 |
|
---|
1125 | #elif defined(FREESCALE_K53_RNGB)
|
---|
1126 | /*
|
---|
1127 | * wc_Generates a RNG seed using the Random Number Generator (RNGB)
|
---|
1128 | * on the Kinetis K53. Documentation located in Chapter 33 of
|
---|
1129 | * K53 Sub-Family Reference Manual (see note in the README for link).
|
---|
1130 | */
|
---|
1131 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1132 | {
|
---|
1133 | int i;
|
---|
1134 |
|
---|
1135 | /* turn on RNGB module */
|
---|
1136 | SIM_SCGC3 |= SIM_SCGC3_RNGB_MASK;
|
---|
1137 |
|
---|
1138 | /* reset RNGB */
|
---|
1139 | RNG_CMD |= RNG_CMD_SR_MASK;
|
---|
1140 |
|
---|
1141 | /* FIFO generate interrupt, return all zeros on underflow,
|
---|
1142 | * set auto reseed */
|
---|
1143 | RNG_CR |= (RNG_CR_FUFMOD_MASK | RNG_CR_AR_MASK);
|
---|
1144 |
|
---|
1145 | /* gen seed, clear interrupts, clear errors */
|
---|
1146 | RNG_CMD |= (RNG_CMD_GS_MASK | RNG_CMD_CI_MASK | RNG_CMD_CE_MASK);
|
---|
1147 |
|
---|
1148 | /* wait for seeding to complete */
|
---|
1149 | while ((RNG_SR & RNG_SR_SDN_MASK) == 0) {}
|
---|
1150 |
|
---|
1151 | for (i = 0; i < sz; i++) {
|
---|
1152 |
|
---|
1153 | /* wait for a word to be available from FIFO */
|
---|
1154 | while((RNG_SR & RNG_SR_FIFO_LVL_MASK) == 0) {}
|
---|
1155 |
|
---|
1156 | /* get value */
|
---|
1157 | output[i] = RNG_OUT;
|
---|
1158 | }
|
---|
1159 |
|
---|
1160 | return 0;
|
---|
1161 | }
|
---|
1162 |
|
---|
1163 | #elif defined(FREESCALE_TRNG)
|
---|
1164 |
|
---|
1165 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1166 | {
|
---|
1167 | TRNG_DRV_GetRandomData(TRNG_INSTANCE, output, sz);
|
---|
1168 | return(0);
|
---|
1169 | }
|
---|
1170 |
|
---|
1171 | #else
|
---|
1172 | #warning "write a real random seed!!!!, just for testing now"
|
---|
1173 |
|
---|
1174 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1175 | {
|
---|
1176 | int i;
|
---|
1177 | for (i = 0; i < sz; i++ )
|
---|
1178 | output[i] = i;
|
---|
1179 |
|
---|
1180 | return 0;
|
---|
1181 | }
|
---|
1182 | #endif /* FREESCALE_K70_RNGA */
|
---|
1183 |
|
---|
1184 | #elif defined(WOLFSSL_SAFERTOS) || defined(WOLFSSL_LEANPSK) \
|
---|
1185 | || defined(WOLFSSL_IAR_ARM) || defined(WOLFSSL_MDK_ARM) \
|
---|
1186 | || defined(WOLFSSL_uITRON4) || defined(WOLFSSL_uTKERNEL2)\
|
---|
1187 | || defined(WOLFSSL_GENSEED_FORTEST)
|
---|
1188 |
|
---|
1189 | #if 0 //ndef _MSC_VER
|
---|
1190 | #warning "write a real random seed!!!!, just for testing now"
|
---|
1191 | //#else
|
---|
1192 | #pragma message("Warning: write a real random seed!!!!, just for testing now")
|
---|
1193 |
|
---|
1194 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1195 | {
|
---|
1196 | word32 i;
|
---|
1197 | for (i = 0; i < sz; i++ )
|
---|
1198 | output[i] = i;
|
---|
1199 |
|
---|
1200 | (void)os;
|
---|
1201 |
|
---|
1202 | return 0;
|
---|
1203 | }
|
---|
1204 | #endif
|
---|
1205 |
|
---|
1206 | #elif defined(STM32F2_RNG)
|
---|
1207 | #undef RNG
|
---|
1208 | #include "stm32f2xx_rng.h"
|
---|
1209 | #include "stm32f2xx_rcc.h"
|
---|
1210 | /*
|
---|
1211 | * wc_Generate a RNG seed using the hardware random number generator
|
---|
1212 | * on the STM32F2. Documentation located in STM32F2xx Standard Peripheral
|
---|
1213 | * Library document (See note in README).
|
---|
1214 | */
|
---|
1215 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1216 | {
|
---|
1217 | int i;
|
---|
1218 |
|
---|
1219 | /* enable RNG clock source */
|
---|
1220 | RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
|
---|
1221 |
|
---|
1222 | /* enable RNG peripheral */
|
---|
1223 | RNG_Cmd(ENABLE);
|
---|
1224 |
|
---|
1225 | for (i = 0; i < sz; i++) {
|
---|
1226 | /* wait until RNG number is ready */
|
---|
1227 | while(RNG_GetFlagStatus(RNG_FLAG_DRDY)== RESET) { }
|
---|
1228 |
|
---|
1229 | /* get value */
|
---|
1230 | output[i] = RNG_GetRandomNumber();
|
---|
1231 | }
|
---|
1232 |
|
---|
1233 | return 0;
|
---|
1234 | }
|
---|
1235 | #elif defined(WOLFSSL_LPC43xx) || defined(WOLFSSL_STM32F2xx) || defined(MBED)
|
---|
1236 |
|
---|
1237 | #warning "write a real random seed!!!!, just for testing now"
|
---|
1238 |
|
---|
1239 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1240 | {
|
---|
1241 | int i;
|
---|
1242 |
|
---|
1243 | for (i = 0; i < sz; i++ )
|
---|
1244 | output[i] = i;
|
---|
1245 |
|
---|
1246 | return 0;
|
---|
1247 | }
|
---|
1248 |
|
---|
1249 | #elif defined(WOLFSSL_TIRTOS)
|
---|
1250 |
|
---|
1251 | #include <xdc/runtime/Timestamp.h>
|
---|
1252 | #include <stdlib.h>
|
---|
1253 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1254 | {
|
---|
1255 | int i;
|
---|
1256 | srand(xdc_runtime_Timestamp_get32());
|
---|
1257 |
|
---|
1258 | for (i = 0; i < sz; i++ ) {
|
---|
1259 | output[i] = rand() % 256;
|
---|
1260 | if ((i % 8) == 7) {
|
---|
1261 | srand(xdc_runtime_Timestamp_get32());
|
---|
1262 | }
|
---|
1263 | }
|
---|
1264 |
|
---|
1265 | return 0;
|
---|
1266 | }
|
---|
1267 |
|
---|
1268 | #elif defined(CUSTOM_RAND_GENERATE)
|
---|
1269 |
|
---|
1270 | /* Implement your own random generation function
|
---|
1271 | * word32 rand_gen(void);
|
---|
1272 | * #define CUSTOM_RAND_GENERATE rand_gen */
|
---|
1273 |
|
---|
1274 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1275 | {
|
---|
1276 | word32 i;
|
---|
1277 |
|
---|
1278 | (void)os;
|
---|
1279 |
|
---|
1280 | for (i = 0; i < sz; i++ )
|
---|
1281 | output[i] = CUSTOM_RAND_GENERATE();
|
---|
1282 |
|
---|
1283 | return 0;
|
---|
1284 | }
|
---|
1285 |
|
---|
1286 | #elif defined(NO_DEV_RANDOM)
|
---|
1287 |
|
---|
1288 | #error "you need to write an os specific wc_GenerateSeed() here"
|
---|
1289 |
|
---|
1290 | /*
|
---|
1291 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1292 | {
|
---|
1293 | return 0;
|
---|
1294 | }
|
---|
1295 | */
|
---|
1296 |
|
---|
1297 |
|
---|
1298 | #elif defined(IDIRECT_DEV_RANDOM)
|
---|
1299 |
|
---|
1300 | extern int getRandom( int sz, unsigned char *output );
|
---|
1301 |
|
---|
1302 | int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1303 | {
|
---|
1304 | int num_bytes_returned = 0;
|
---|
1305 |
|
---|
1306 | num_bytes_returned = getRandom( (int) sz, (unsigned char *) output );
|
---|
1307 |
|
---|
1308 | return 0;
|
---|
1309 | }
|
---|
1310 |
|
---|
1311 |
|
---|
1312 | #else /* !USE_WINDOWS_API && !HAVE_RPT_SYS && !MICRIUM && !NO_DEV_RANDOM */
|
---|
1313 |
|
---|
1314 | /* may block */
|
---|
1315 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
1316 | {
|
---|
1317 | int ret = 0;
|
---|
1318 |
|
---|
1319 |
|
---|
1320 | #if defined(HAVE_INTEL_RDGEN) && (defined(HAVE_HASHDRBG) || defined(NO_RC4))
|
---|
1321 | wc_InitRng_IntelRD() ; /* set cpuid_flags if not yet */
|
---|
1322 | if(IS_INTEL_RDSEED)
|
---|
1323 | return wc_GenerateSeed_IntelRD(NULL, output, sz) ;
|
---|
1324 | #endif
|
---|
1325 |
|
---|
1326 | os->fd = open("/dev/urandom",O_RDONLY);
|
---|
1327 | if (os->fd == -1) {
|
---|
1328 | /* may still have /dev/random */
|
---|
1329 | os->fd = open("/dev/random",O_RDONLY);
|
---|
1330 | if (os->fd == -1)
|
---|
1331 | return OPEN_RAN_E;
|
---|
1332 | }
|
---|
1333 |
|
---|
1334 | while (sz) {
|
---|
1335 | int len = (int)read(os->fd, output, sz);
|
---|
1336 | if (len == -1) {
|
---|
1337 | ret = READ_RAN_E;
|
---|
1338 | break;
|
---|
1339 | }
|
---|
1340 |
|
---|
1341 | sz -= len;
|
---|
1342 | output += len;
|
---|
1343 |
|
---|
1344 | if (sz) {
|
---|
1345 | #ifdef BLOCKING
|
---|
1346 | sleep(0); /* context switch */
|
---|
1347 | #else
|
---|
1348 | ret = RAN_BLOCK_E;
|
---|
1349 | break;
|
---|
1350 | #endif
|
---|
1351 | }
|
---|
1352 | }
|
---|
1353 | close(os->fd);
|
---|
1354 |
|
---|
1355 | return ret;
|
---|
1356 | }
|
---|
1357 |
|
---|
1358 | #endif /* USE_WINDOWS_API */
|
---|
1359 | #endif /* HAVE_FIPS */
|
---|
1360 |
|
---|