Francois Berder / cyassl-lib

fork of cyassl-lib

Dependents:   TLS_cyassl TLS_cyassl

ctaocrypt/src/random.c@4:f377303c41be, 2013-09-16 (annotated)

Committer:
feb11
Date:
Mon Sep 16 09:53:35 2013 +0000
Revision:
4:f377303c41be
Parent:
0:714293de3836 
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ashleymills 0:714293de3836 1 /* random.c
ashleymills 0:714293de3836 2 *
ashleymills 0:714293de3836 3 * Copyright (C) 2006-2013 wolfSSL Inc.
ashleymills 0:714293de3836 4 *
ashleymills 0:714293de3836 5 * This file is part of CyaSSL.
ashleymills 0:714293de3836 6 *
ashleymills 0:714293de3836 7 * CyaSSL is free software; you can redistribute it and/or modify
ashleymills 0:714293de3836 8 * it under the terms of the GNU General Public License as published by
ashleymills 0:714293de3836 9 * the Free Software Foundation; either version 2 of the License, or
ashleymills 0:714293de3836 10 * (at your option) any later version.
ashleymills 0:714293de3836 11 *
ashleymills 0:714293de3836 12 * CyaSSL is distributed in the hope that it will be useful,
ashleymills 0:714293de3836 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ashleymills 0:714293de3836 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ashleymills 0:714293de3836 15 * GNU General Public License for more details.
ashleymills 0:714293de3836 16 *
ashleymills 0:714293de3836 17 * You should have received a copy of the GNU General Public License
ashleymills 0:714293de3836 18 * along with this program; if not, write to the Free Software
ashleymills 0:714293de3836 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
ashleymills 0:714293de3836 20 */
ashleymills 0:714293de3836 21
ashleymills 0:714293de3836 22 #ifdef HAVE_CONFIG_H
ashleymills 0:714293de3836 23 #include <config.h>
ashleymills 0:714293de3836 24 #endif
ashleymills 0:714293de3836 25
ashleymills 0:714293de3836 26 /* on HPUX 11 you may need to install /dev/random see
ashleymills 0:714293de3836 27 http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I
ashleymills 0:714293de3836 28
ashleymills 0:714293de3836 29 */
ashleymills 0:714293de3836 30
ashleymills 0:714293de3836 31 #include <cyassl/ctaocrypt/random.h>
ashleymills 0:714293de3836 32 #include <cyassl/ctaocrypt/ctaoerror2.h>
ashleymills 0:714293de3836 33
ashleymills 0:714293de3836 34 #ifdef NO_RC4
ashleymills 0:714293de3836 35 #include <cyassl/ctaocrypt/sha256.h>
ashleymills 0:714293de3836 36
ashleymills 0:714293de3836 37 #ifdef NO_INLINE
ashleymills 0:714293de3836 38 #include <cyassl/ctaocrypt/misc.h>
ashleymills 0:714293de3836 39 #else
ashleymills 0:714293de3836 40 #define MISC_DUMM_FUNC misc_dummy_random
ashleymills 0:714293de3836 41 #include <ctaocrypt/src/misc.c>
ashleymills 0:714293de3836 42 #endif
ashleymills 0:714293de3836 43 #endif
ashleymills 0:714293de3836 44
ashleymills 0:714293de3836 45 #if defined(USE_WINDOWS_API)
ashleymills 0:714293de3836 46 #ifndef _WIN32_WINNT
ashleymills 0:714293de3836 47 #define _WIN32_WINNT 0x0400
ashleymills 0:714293de3836 48 #endif
ashleymills 0:714293de3836 49 #include <windows.h>
ashleymills 0:714293de3836 50 #include <wincrypt.h>
ashleymills 0:714293de3836 51 #else
ashleymills 0:714293de3836 52 #if !defined(NO_DEV_RANDOM) && !defined(CYASSL_MDK_ARM)
ashleymills 0:714293de3836 53 #include <fcntl.h>
ashleymills 0:714293de3836 54 #ifndef EBSNET
ashleymills 0:714293de3836 55 #include <unistd.h>
ashleymills 0:714293de3836 56 #endif
ashleymills 0:714293de3836 57 #else
ashleymills 0:714293de3836 58 /* include headers that may be needed to get good seed */
ashleymills 0:714293de3836 59 #endif
ashleymills 0:714293de3836 60 #endif /* USE_WINDOWS_API */
ashleymills 0:714293de3836 61
ashleymills 0:714293de3836 62
ashleymills 0:714293de3836 63 #ifdef NO_RC4
ashleymills 0:714293de3836 64
ashleymills 0:714293de3836 65 /* Start NIST DRBG code */
ashleymills 0:714293de3836 66
ashleymills 0:714293de3836 67 #define OUTPUT_BLOCK_LEN (256/8)
ashleymills 0:714293de3836 68 #define MAX_REQUEST_LEN (0x1000)
ashleymills 0:714293de3836 69 #define MAX_STRING_LEN (0x100000000)
ashleymills 0:714293de3836 70 #define RESEED_MAX (0x100000000000LL)
ashleymills 0:714293de3836 71 #define ENTROPY_SZ 256
ashleymills 0:714293de3836 72
ashleymills 0:714293de3836 73 #define DBRG_SUCCESS 0
ashleymills 0:714293de3836 74 #define DBRG_ERROR 1
ashleymills 0:714293de3836 75 #define DBRG_NEED_RESEED 2
ashleymills 0:714293de3836 76
ashleymills 0:714293de3836 77
ashleymills 0:714293de3836 78 enum {
ashleymills 0:714293de3836 79 dbrgInitC = 0,
ashleymills 0:714293de3836 80 dbrgReseed = 1,
ashleymills 0:714293de3836 81 dbrgGenerateW = 2,
ashleymills 0:714293de3836 82 dbrgGenerateH = 3,
ashleymills 0:714293de3836 83 dbrgInitV
ashleymills 0:714293de3836 84 };
ashleymills 0:714293de3836 85
ashleymills 0:714293de3836 86
ashleymills 0:714293de3836 87 static int Hash_df(RNG* rng, byte* out, word32 outSz, byte type, byte* inA, word32 inASz,
ashleymills 0:714293de3836 88 byte* inB, word32 inBSz, byte* inC, word32 inCSz)
ashleymills 0:714293de3836 89 {
ashleymills 0:714293de3836 90 byte ctr;
ashleymills 0:714293de3836 91 int i;
ashleymills 0:714293de3836 92 int len;
ashleymills 0:714293de3836 93 word32 bits = (outSz * 8); /* reverse byte order */
ashleymills 0:714293de3836 94
ashleymills 0:714293de3836 95 #ifdef LITTLE_ENDIAN_ORDER
ashleymills 0:714293de3836 96 bits = ByteReverseWord32(bits);
ashleymills 0:714293de3836 97 #endif
ashleymills 0:714293de3836 98 len = (outSz / SHA256_DIGEST_SIZE)
ashleymills 0:714293de3836 99 + ((outSz % SHA256_DIGEST_SIZE) ? 1 : 0);
ashleymills 0:714293de3836 100
ashleymills 0:714293de3836 101 for (i = 0, ctr = 1; i < len; i++, ctr++)
ashleymills 0:714293de3836 102 {
ashleymills 0:714293de3836 103 InitSha256(&rng->sha);
ashleymills 0:714293de3836 104 Sha256Update(&rng->sha, &ctr, sizeof(ctr));
ashleymills 0:714293de3836 105 Sha256Update(&rng->sha, (byte*)&bits, sizeof(bits));
ashleymills 0:714293de3836 106 /* churning V is the only string that doesn't have
ashleymills 0:714293de3836 107 * the type added */
ashleymills 0:714293de3836 108 if (type != dbrgInitV)
ashleymills 0:714293de3836 109 Sha256Update(&rng->sha, &type, sizeof(type));
ashleymills 0:714293de3836 110 Sha256Update(&rng->sha, inA, inASz);
ashleymills 0:714293de3836 111 if (inB != NULL && inBSz > 0)
ashleymills 0:714293de3836 112 Sha256Update(&rng->sha, inB, inBSz);
ashleymills 0:714293de3836 113 if (inC != NULL && inCSz > 0)
ashleymills 0:714293de3836 114 Sha256Update(&rng->sha, inC, inCSz);
ashleymills 0:714293de3836 115 Sha256Final(&rng->sha, rng->digest);
ashleymills 0:714293de3836 116
ashleymills 0:714293de3836 117 if (outSz > SHA256_DIGEST_SIZE) {
ashleymills 0:714293de3836 118 XMEMCPY(out, rng->digest, SHA256_DIGEST_SIZE);
ashleymills 0:714293de3836 119 outSz -= SHA256_DIGEST_SIZE;
ashleymills 0:714293de3836 120 out += SHA256_DIGEST_SIZE;
ashleymills 0:714293de3836 121 }
ashleymills 0:714293de3836 122 else {
ashleymills 0:714293de3836 123 XMEMCPY(out, rng->digest, outSz);
ashleymills 0:714293de3836 124 }
ashleymills 0:714293de3836 125 }
ashleymills 0:714293de3836 126
ashleymills 0:714293de3836 127 return DBRG_SUCCESS;
ashleymills 0:714293de3836 128 }
ashleymills 0:714293de3836 129
ashleymills 0:714293de3836 130
ashleymills 0:714293de3836 131 static int Hash_DBRG_Reseed(RNG* rng, byte* entropy, word32 entropySz)
ashleymills 0:714293de3836 132 {
ashleymills 0:714293de3836 133 byte seed[DBRG_SEED_LEN];
ashleymills 0:714293de3836 134
ashleymills 0:714293de3836 135 Hash_df(rng, seed, sizeof(seed), dbrgInitV, rng->V, sizeof(rng->V),
ashleymills 0:714293de3836 136 entropy, entropySz, NULL, 0);
ashleymills 0:714293de3836 137 XMEMCPY(rng->V, seed, sizeof(rng->V));
ashleymills 0:714293de3836 138 XMEMSET(seed, 0, sizeof(seed));
ashleymills 0:714293de3836 139
ashleymills 0:714293de3836 140 Hash_df(rng, rng->C, sizeof(rng->C), dbrgInitC, rng->V, sizeof(rng->V),
ashleymills 0:714293de3836 141 NULL, 0, NULL, 0);
ashleymills 0:714293de3836 142 rng->reseed_ctr = 1;
ashleymills 0:714293de3836 143 return 0;
ashleymills 0:714293de3836 144 }
ashleymills 0:714293de3836 145
ashleymills 0:714293de3836 146 static INLINE void array_add_one(byte* data, word32 dataSz)
ashleymills 0:714293de3836 147 {
ashleymills 0:714293de3836 148 int i;
ashleymills 0:714293de3836 149
ashleymills 0:714293de3836 150 for (i = dataSz - 1; i >= 0; i--)
ashleymills 0:714293de3836 151 {
ashleymills 0:714293de3836 152 data[i]++;
ashleymills 0:714293de3836 153 if (data[i] != 0) break;
ashleymills 0:714293de3836 154 }
ashleymills 0:714293de3836 155 }
ashleymills 0:714293de3836 156
ashleymills 0:714293de3836 157 static void Hash_gen(RNG* rng, byte* out, word32 outSz, byte* V)
ashleymills 0:714293de3836 158 {
ashleymills 0:714293de3836 159 byte data[DBRG_SEED_LEN];
ashleymills 0:714293de3836 160 int i;
ashleymills 0:714293de3836 161 int len = (outSz / SHA256_DIGEST_SIZE)
ashleymills 0:714293de3836 162 + ((outSz % SHA256_DIGEST_SIZE) ? 1 : 0);
ashleymills 0:714293de3836 163
ashleymills 0:714293de3836 164 XMEMCPY(data, V, sizeof(data));
ashleymills 0:714293de3836 165 for (i = 0; i < len; i++) {
ashleymills 0:714293de3836 166 InitSha256(&rng->sha);
ashleymills 0:714293de3836 167 Sha256Update(&rng->sha, data, sizeof(data));
ashleymills 0:714293de3836 168 Sha256Final(&rng->sha, rng->digest);
ashleymills 0:714293de3836 169 if (outSz > SHA256_DIGEST_SIZE) {
ashleymills 0:714293de3836 170 XMEMCPY(out, rng->digest, SHA256_DIGEST_SIZE);
ashleymills 0:714293de3836 171 outSz -= SHA256_DIGEST_SIZE;
ashleymills 0:714293de3836 172 out += SHA256_DIGEST_SIZE;
ashleymills 0:714293de3836 173 array_add_one(data, DBRG_SEED_LEN);
ashleymills 0:714293de3836 174 }
ashleymills 0:714293de3836 175 else {
ashleymills 0:714293de3836 176 XMEMCPY(out, rng->digest, outSz);
ashleymills 0:714293de3836 177 }
ashleymills 0:714293de3836 178 }
ashleymills 0:714293de3836 179 XMEMSET(data, 0, sizeof(data));
ashleymills 0:714293de3836 180 }
ashleymills 0:714293de3836 181
ashleymills 0:714293de3836 182
ashleymills 0:714293de3836 183 static INLINE void array_add(byte* d, word32 dLen, byte* s, word32 sLen)
ashleymills 0:714293de3836 184 {
ashleymills 0:714293de3836 185 word16 carry = 0;
ashleymills 0:714293de3836 186
ashleymills 0:714293de3836 187 if (dLen > 0 && sLen > 0 && dLen >= sLen) {
ashleymills 0:714293de3836 188 int sIdx, dIdx;
ashleymills 0:714293de3836 189
ashleymills 0:714293de3836 190 for (sIdx = sLen - 1, dIdx = dLen - 1; sIdx >= 0; dIdx--, sIdx--)
ashleymills 0:714293de3836 191 {
ashleymills 0:714293de3836 192 carry += d[dIdx] + s[sIdx];
ashleymills 0:714293de3836 193 d[dIdx] = carry;
ashleymills 0:714293de3836 194 carry >>= 8;
ashleymills 0:714293de3836 195 }
ashleymills 0:714293de3836 196 if (dIdx > 0)
ashleymills 0:714293de3836 197 d[dIdx] += carry;
ashleymills 0:714293de3836 198 }
ashleymills 0:714293de3836 199 }
ashleymills 0:714293de3836 200
ashleymills 0:714293de3836 201
ashleymills 0:714293de3836 202 static int Hash_DBRG_Generate(RNG* rng, byte* out, word32 outSz)
ashleymills 0:714293de3836 203 {
ashleymills 0:714293de3836 204 int ret;
ashleymills 0:714293de3836 205
ashleymills 0:714293de3836 206 if (rng->reseed_ctr != RESEED_MAX) {
ashleymills 0:714293de3836 207 byte type = dbrgGenerateH;
ashleymills 0:714293de3836 208
ashleymills 0:714293de3836 209 Hash_gen(rng, out, outSz, rng->V);
ashleymills 0:714293de3836 210 InitSha256(&rng->sha);
ashleymills 0:714293de3836 211 Sha256Update(&rng->sha, &type, sizeof(type));
ashleymills 0:714293de3836 212 Sha256Update(&rng->sha, rng->V, sizeof(rng->V));
ashleymills 0:714293de3836 213 Sha256Final(&rng->sha, rng->digest);
ashleymills 0:714293de3836 214 array_add(rng->V, sizeof(rng->V), rng->digest, sizeof(rng->digest));
ashleymills 0:714293de3836 215 array_add(rng->V, sizeof(rng->V), rng->C, sizeof(rng->C));
ashleymills 0:714293de3836 216 array_add(rng->V, sizeof(rng->V),
ashleymills 0:714293de3836 217 (byte*)&rng->reseed_ctr, sizeof(rng->reseed_ctr));
ashleymills 0:714293de3836 218 rng->reseed_ctr++;
ashleymills 0:714293de3836 219 ret = DBRG_SUCCESS;
ashleymills 0:714293de3836 220 }
ashleymills 0:714293de3836 221 else {
ashleymills 0:714293de3836 222 ret = DBRG_NEED_RESEED;
ashleymills 0:714293de3836 223 }
ashleymills 0:714293de3836 224 return ret;
ashleymills 0:714293de3836 225 }
ashleymills 0:714293de3836 226
ashleymills 0:714293de3836 227
ashleymills 0:714293de3836 228 static void Hash_DBRG_Instantiate(RNG* rng, byte* seed, word32 seedSz)
ashleymills 0:714293de3836 229 {
ashleymills 0:714293de3836 230 XMEMSET(rng, 0, sizeof(*rng));
ashleymills 0:714293de3836 231 Hash_df(rng, rng->V, sizeof(rng->V), dbrgInitV, seed, seedSz, NULL, 0, NULL, 0);
ashleymills 0:714293de3836 232 Hash_df(rng, rng->C, sizeof(rng->C), dbrgInitC, rng->V, sizeof(rng->V),
ashleymills 0:714293de3836 233 NULL, 0, NULL, 0);
ashleymills 0:714293de3836 234 rng->reseed_ctr = 1;
ashleymills 0:714293de3836 235 }
ashleymills 0:714293de3836 236
ashleymills 0:714293de3836 237
ashleymills 0:714293de3836 238 static int Hash_DBRG_Uninstantiate(RNG* rng)
ashleymills 0:714293de3836 239 {
ashleymills 0:714293de3836 240 int result = DBRG_ERROR;
ashleymills 0:714293de3836 241
ashleymills 0:714293de3836 242 if (rng != NULL) {
ashleymills 0:714293de3836 243 XMEMSET(rng, 0, sizeof(*rng));
ashleymills 0:714293de3836 244 result = DBRG_SUCCESS;
ashleymills 0:714293de3836 245 }
ashleymills 0:714293de3836 246
ashleymills 0:714293de3836 247 return result;
ashleymills 0:714293de3836 248 }
ashleymills 0:714293de3836 249
ashleymills 0:714293de3836 250 /* End NIST DRBG Code */
ashleymills 0:714293de3836 251
ashleymills 0:714293de3836 252
ashleymills 0:714293de3836 253
ashleymills 0:714293de3836 254 /* Get seed and key cipher */
ashleymills 0:714293de3836 255 int InitRng(RNG* rng)
ashleymills 0:714293de3836 256 {
ashleymills 0:714293de3836 257 byte entropy[ENTROPY_SZ];
ashleymills 0:714293de3836 258 int ret = DBRG_ERROR;
ashleymills 0:714293de3836 259
ashleymills 0:714293de3836 260 if (GenerateSeed(&rng->seed, entropy, sizeof(entropy)) == 0) {
ashleymills 0:714293de3836 261 Hash_DBRG_Instantiate(rng, entropy, sizeof(entropy));
ashleymills 0:714293de3836 262 ret = DBRG_SUCCESS;
ashleymills 0:714293de3836 263 }
ashleymills 0:714293de3836 264 XMEMSET(entropy, 0, sizeof(entropy));
ashleymills 0:714293de3836 265 return ret;
ashleymills 0:714293de3836 266 }
ashleymills 0:714293de3836 267
ashleymills 0:714293de3836 268
ashleymills 0:714293de3836 269 /* place a generated block in output */
ashleymills 0:714293de3836 270 void RNG_GenerateBlock(RNG* rng, byte* output, word32 sz)
ashleymills 0:714293de3836 271 {
ashleymills 0:714293de3836 272 int ret;
ashleymills 0:714293de3836 273
ashleymills 0:714293de3836 274 XMEMSET(output, 0, sz);
ashleymills 0:714293de3836 275 ret = Hash_DBRG_Generate(rng, output, sz);
ashleymills 0:714293de3836 276 if (ret == DBRG_NEED_RESEED) {
ashleymills 0:714293de3836 277 byte entropy[ENTROPY_SZ];
ashleymills 0:714293de3836 278 ret = GenerateSeed(&rng->seed, entropy, sizeof(entropy));
ashleymills 0:714293de3836 279 if (ret == 0) {
ashleymills 0:714293de3836 280 Hash_DBRG_Reseed(rng, entropy, sizeof(entropy));
ashleymills 0:714293de3836 281 ret = Hash_DBRG_Generate(rng, output, sz);
ashleymills 0:714293de3836 282 }
ashleymills 0:714293de3836 283 else
ashleymills 0:714293de3836 284 ret = DBRG_ERROR;
ashleymills 0:714293de3836 285 XMEMSET(entropy, 0, sizeof(entropy));
ashleymills 0:714293de3836 286 }
ashleymills 0:714293de3836 287 }
ashleymills 0:714293de3836 288
ashleymills 0:714293de3836 289
ashleymills 0:714293de3836 290 byte RNG_GenerateByte(RNG* rng)
ashleymills 0:714293de3836 291 {
ashleymills 0:714293de3836 292 byte b;
ashleymills 0:714293de3836 293 RNG_GenerateBlock(rng, &b, 1);
ashleymills 0:714293de3836 294
ashleymills 0:714293de3836 295 return b;
ashleymills 0:714293de3836 296 }
ashleymills 0:714293de3836 297
ashleymills 0:714293de3836 298
ashleymills 0:714293de3836 299 void FreeRng(RNG* rng)
ashleymills 0:714293de3836 300 {
ashleymills 0:714293de3836 301 Hash_DBRG_Uninstantiate(rng);
ashleymills 0:714293de3836 302 }
ashleymills 0:714293de3836 303
ashleymills 0:714293de3836 304 #else /* NO_RC4 */
ashleymills 0:714293de3836 305
ashleymills 0:714293de3836 306 /* Get seed and key cipher */
ashleymills 0:714293de3836 307 int InitRng(RNG* rng)
ashleymills 0:714293de3836 308 {
ashleymills 0:714293de3836 309 byte key[32];
ashleymills 0:714293de3836 310 byte junk[256];
ashleymills 0:714293de3836 311 int ret;
ashleymills 0:714293de3836 312
ashleymills 0:714293de3836 313 #ifdef HAVE_CAVIUM
ashleymills 0:714293de3836 314 if (rng->magic == CYASSL_RNG_CAVIUM_MAGIC)
ashleymills 0:714293de3836 315 return 0;
ashleymills 0:714293de3836 316 #endif
ashleymills 0:714293de3836 317 ret = GenerateSeed(&rng->seed, key, sizeof(key));
ashleymills 0:714293de3836 318
ashleymills 0:714293de3836 319 if (ret == 0) {
ashleymills 0:714293de3836 320 Arc4SetKey(&rng->cipher, key, sizeof(key));
ashleymills 0:714293de3836 321 RNG_GenerateBlock(rng, junk, sizeof(junk)); /* rid initial state */
ashleymills 0:714293de3836 322 }
ashleymills 0:714293de3836 323
ashleymills 0:714293de3836 324 return ret;
ashleymills 0:714293de3836 325 }
ashleymills 0:714293de3836 326
ashleymills 0:714293de3836 327 #ifdef HAVE_CAVIUM
ashleymills 0:714293de3836 328 static void CaviumRNG_GenerateBlock(RNG* rng, byte* output, word32 sz);
ashleymills 0:714293de3836 329 #endif
ashleymills 0:714293de3836 330
ashleymills 0:714293de3836 331 /* place a generated block in output */
ashleymills 0:714293de3836 332 void RNG_GenerateBlock(RNG* rng, byte* output, word32 sz)
ashleymills 0:714293de3836 333 {
ashleymills 0:714293de3836 334 #ifdef HAVE_CAVIUM
ashleymills 0:714293de3836 335 if (rng->magic == CYASSL_RNG_CAVIUM_MAGIC)
ashleymills 0:714293de3836 336 return CaviumRNG_GenerateBlock(rng, output, sz);
ashleymills 0:714293de3836 337 #endif
ashleymills 0:714293de3836 338 XMEMSET(output, 0, sz);
ashleymills 0:714293de3836 339 Arc4Process(&rng->cipher, output, output, sz);
ashleymills 0:714293de3836 340 }
ashleymills 0:714293de3836 341
ashleymills 0:714293de3836 342
ashleymills 0:714293de3836 343 byte RNG_GenerateByte(RNG* rng)
ashleymills 0:714293de3836 344 {
ashleymills 0:714293de3836 345 byte b;
ashleymills 0:714293de3836 346 RNG_GenerateBlock(rng, &b, 1);
ashleymills 0:714293de3836 347
ashleymills 0:714293de3836 348 return b;
ashleymills 0:714293de3836 349 }
ashleymills 0:714293de3836 350
ashleymills 0:714293de3836 351
ashleymills 0:714293de3836 352 #ifdef HAVE_CAVIUM
ashleymills 0:714293de3836 353
ashleymills 0:714293de3836 354 #include <cyassl/ctaocrypt/logging.h>
ashleymills 0:714293de3836 355 #include "cavium_common.h"
ashleymills 0:714293de3836 356
ashleymills 0:714293de3836 357 /* Initiliaze RNG for use with Nitrox device */
ashleymills 0:714293de3836 358 int InitRngCavium(RNG* rng, int devId)
ashleymills 0:714293de3836 359 {
ashleymills 0:714293de3836 360 if (rng == NULL)
ashleymills 0:714293de3836 361 return -1;
ashleymills 0:714293de3836 362
ashleymills 0:714293de3836 363 rng->devId = devId;
ashleymills 0:714293de3836 364 rng->magic = CYASSL_RNG_CAVIUM_MAGIC;
ashleymills 0:714293de3836 365
ashleymills 0:714293de3836 366 return 0;
ashleymills 0:714293de3836 367 }
ashleymills 0:714293de3836 368
ashleymills 0:714293de3836 369
ashleymills 0:714293de3836 370 static void CaviumRNG_GenerateBlock(RNG* rng, byte* output, word32 sz)
ashleymills 0:714293de3836 371 {
ashleymills 0:714293de3836 372 word offset = 0;
ashleymills 0:714293de3836 373 word32 requestId;
ashleymills 0:714293de3836 374
ashleymills 0:714293de3836 375 while (sz > CYASSL_MAX_16BIT) {
ashleymills 0:714293de3836 376 word16 slen = (word16)CYASSL_MAX_16BIT;
ashleymills 0:714293de3836 377 if (CspRandom(CAVIUM_BLOCKING, slen, output + offset, &requestId,
ashleymills 0:714293de3836 378 rng->devId) != 0) {
ashleymills 0:714293de3836 379 CYASSL_MSG("Cavium RNG failed");
ashleymills 0:714293de3836 380 }
ashleymills 0:714293de3836 381 sz -= CYASSL_MAX_16BIT;
ashleymills 0:714293de3836 382 offset += CYASSL_MAX_16BIT;
ashleymills 0:714293de3836 383 }
ashleymills 0:714293de3836 384 if (sz) {
ashleymills 0:714293de3836 385 word16 slen = (word16)sz;
ashleymills 0:714293de3836 386 if (CspRandom(CAVIUM_BLOCKING, slen, output + offset, &requestId,
ashleymills 0:714293de3836 387 rng->devId) != 0) {
ashleymills 0:714293de3836 388 CYASSL_MSG("Cavium RNG failed");
ashleymills 0:714293de3836 389 }
ashleymills 0:714293de3836 390 }
ashleymills 0:714293de3836 391 }
ashleymills 0:714293de3836 392
ashleymills 0:714293de3836 393 #endif /* HAVE_CAVIUM */
ashleymills 0:714293de3836 394
ashleymills 0:714293de3836 395 #endif /* NO_RC4 */
ashleymills 0:714293de3836 396
ashleymills 0:714293de3836 397
ashleymills 0:714293de3836 398 #if defined(USE_WINDOWS_API)
ashleymills 0:714293de3836 399
ashleymills 0:714293de3836 400
ashleymills 0:714293de3836 401 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 402 {
ashleymills 0:714293de3836 403 if(!CryptAcquireContext(&os->handle, 0, 0, PROV_RSA_FULL,
ashleymills 0:714293de3836 404 CRYPT_VERIFYCONTEXT))
ashleymills 0:714293de3836 405 return WINCRYPT_E;
ashleymills 0:714293de3836 406
ashleymills 0:714293de3836 407 if (!CryptGenRandom(os->handle, sz, output))
ashleymills 0:714293de3836 408 return CRYPTGEN_E;
ashleymills 0:714293de3836 409
ashleymills 0:714293de3836 410 CryptReleaseContext(os->handle, 0);
ashleymills 0:714293de3836 411
ashleymills 0:714293de3836 412 return 0;
ashleymills 0:714293de3836 413 }
ashleymills 0:714293de3836 414
ashleymills 0:714293de3836 415
ashleymills 0:714293de3836 416 #elif defined(HAVE_RTP_SYS) || defined(EBSNET)
ashleymills 0:714293de3836 417
ashleymills 0:714293de3836 418 #include "rtprand.h" /* rtp_rand () */
ashleymills 0:714293de3836 419 #include "rtptime.h" /* rtp_get_system_msec() */
ashleymills 0:714293de3836 420
ashleymills 0:714293de3836 421
ashleymills 0:714293de3836 422 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 423 {
ashleymills 0:714293de3836 424 int i;
ashleymills 0:714293de3836 425 rtp_srand(rtp_get_system_msec());
ashleymills 0:714293de3836 426
ashleymills 0:714293de3836 427 for (i = 0; i < sz; i++ ) {
ashleymills 0:714293de3836 428 output[i] = rtp_rand() % 256;
ashleymills 0:714293de3836 429 if ( (i % 8) == 7)
ashleymills 0:714293de3836 430 rtp_srand(rtp_get_system_msec());
ashleymills 0:714293de3836 431 }
ashleymills 0:714293de3836 432
ashleymills 0:714293de3836 433 return 0;
ashleymills 0:714293de3836 434 }
ashleymills 0:714293de3836 435
ashleymills 0:714293de3836 436
ashleymills 0:714293de3836 437 #elif defined(MICRIUM)
ashleymills 0:714293de3836 438
ashleymills 0:714293de3836 439 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 440 {
ashleymills 0:714293de3836 441 #if (NET_SECURE_MGR_CFG_EN == DEF_ENABLED)
ashleymills 0:714293de3836 442 NetSecure_InitSeed(output, sz);
ashleymills 0:714293de3836 443 #endif
ashleymills 0:714293de3836 444 return 0;
ashleymills 0:714293de3836 445 }
ashleymills 0:714293de3836 446
ashleymills 0:714293de3836 447 #elif defined(MBED)
ashleymills 0:714293de3836 448
ashleymills 0:714293de3836 449 /* write a real one !!!, just for testing board */
ashleymills 0:714293de3836 450 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 451 {
ashleymills 0:714293de3836 452 int i;
ashleymills 0:714293de3836 453 for (i = 0; i < sz; i++ )
ashleymills 0:714293de3836 454 output[i] = i;
ashleymills 0:714293de3836 455
ashleymills 0:714293de3836 456 return 0;
ashleymills 0:714293de3836 457 }
ashleymills 0:714293de3836 458
ashleymills 0:714293de3836 459 #elif defined(MICROCHIP_PIC32)
ashleymills 0:714293de3836 460
ashleymills 0:714293de3836 461 #include <peripheral/timer.h>
ashleymills 0:714293de3836 462
ashleymills 0:714293de3836 463 /* uses the core timer, in nanoseconds to seed srand */
ashleymills 0:714293de3836 464 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 465 {
ashleymills 0:714293de3836 466 int i;
ashleymills 0:714293de3836 467 srand(ReadCoreTimer() * 25);
ashleymills 0:714293de3836 468
ashleymills 0:714293de3836 469 for (i = 0; i < sz; i++ ) {
ashleymills 0:714293de3836 470 output[i] = rand() % 256;
ashleymills 0:714293de3836 471 if ( (i % 8) == 7)
ashleymills 0:714293de3836 472 srand(ReadCoreTimer() * 25);
ashleymills 0:714293de3836 473 }
ashleymills 0:714293de3836 474
ashleymills 0:714293de3836 475 return 0;
ashleymills 0:714293de3836 476 }
ashleymills 0:714293de3836 477
ashleymills 0:714293de3836 478 #elif defined(CYASSL_SAFERTOS) || defined(CYASSL_LEANPSK)
ashleymills 0:714293de3836 479
ashleymills 0:714293de3836 480 #warning "write a real random seed!!!!, just for testing now"
ashleymills 0:714293de3836 481
ashleymills 0:714293de3836 482 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 483 {
ashleymills 0:714293de3836 484 word32 i;
ashleymills 0:714293de3836 485 for (i = 0; i < sz; i++ )
ashleymills 0:714293de3836 486 output[i] = i;
ashleymills 0:714293de3836 487
ashleymills 0:714293de3836 488 (void)os;
ashleymills 0:714293de3836 489
ashleymills 0:714293de3836 490 return 0;
ashleymills 0:714293de3836 491 }
ashleymills 0:714293de3836 492
ashleymills 0:714293de3836 493 #elif defined(FREESCALE_MQX)
ashleymills 0:714293de3836 494
ashleymills 0:714293de3836 495 #ifdef FREESCALE_K70_RNGA
ashleymills 0:714293de3836 496 /*
ashleymills 0:714293de3836 497 * Generates a RNG seed using the Random Number Generator Accelerator
ashleymills 0:714293de3836 498 * on the Kinetis K70. Documentation located in Chapter 37 of
ashleymills 0:714293de3836 499 * K70 Sub-Family Reference Manual (see Note 3 in the README for link).
ashleymills 0:714293de3836 500 */
ashleymills 0:714293de3836 501 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 502 {
ashleymills 0:714293de3836 503 int i;
ashleymills 0:714293de3836 504
ashleymills 0:714293de3836 505 /* turn on RNGA module */
ashleymills 0:714293de3836 506 SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK;
ashleymills 0:714293de3836 507
ashleymills 0:714293de3836 508 /* set SLP bit to 0 - "RNGA is not in sleep mode" */
ashleymills 0:714293de3836 509 RNG_CR &= ~RNG_CR_SLP_MASK;
ashleymills 0:714293de3836 510
ashleymills 0:714293de3836 511 /* set HA bit to 1 - "security violations masked" */
ashleymills 0:714293de3836 512 RNG_CR |= RNG_CR_HA_MASK;
ashleymills 0:714293de3836 513
ashleymills 0:714293de3836 514 /* set GO bit to 1 - "output register loaded with data" */
ashleymills 0:714293de3836 515 RNG_CR |= RNG_CR_GO_MASK;
ashleymills 0:714293de3836 516
ashleymills 0:714293de3836 517 for (i = 0; i < sz; i++) {
ashleymills 0:714293de3836 518
ashleymills 0:714293de3836 519 /* wait for RNG FIFO to be full */
ashleymills 0:714293de3836 520 while((RNG_SR & RNG_SR_OREG_LVL(0xF)) == 0) {}
ashleymills 0:714293de3836 521
ashleymills 0:714293de3836 522 /* get value */
ashleymills 0:714293de3836 523 output[i] = RNG_OR;
ashleymills 0:714293de3836 524 }
ashleymills 0:714293de3836 525
ashleymills 0:714293de3836 526 return 0;
ashleymills 0:714293de3836 527 }
ashleymills 0:714293de3836 528 #else
ashleymills 0:714293de3836 529 #warning "write a real random seed!!!!, just for testing now"
ashleymills 0:714293de3836 530
ashleymills 0:714293de3836 531 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 532 {
ashleymills 0:714293de3836 533 int i;
ashleymills 0:714293de3836 534 for (i = 0; i < sz; i++ )
ashleymills 0:714293de3836 535 output[i] = i;
ashleymills 0:714293de3836 536
ashleymills 0:714293de3836 537 return 0;
ashleymills 0:714293de3836 538 }
ashleymills 0:714293de3836 539 #endif /* FREESCALE_K70_RNGA */
ashleymills 0:714293de3836 540
ashleymills 0:714293de3836 541 #elif defined(STM32F2_RNG)
ashleymills 0:714293de3836 542 #undef RNG
ashleymills 0:714293de3836 543 #include "stm32f2xx_rng.h"
ashleymills 0:714293de3836 544 #include "stm32f2xx_rcc.h"
ashleymills 0:714293de3836 545 /*
ashleymills 0:714293de3836 546 * Generate a RNG seed using the hardware random number generator
ashleymills 0:714293de3836 547 * on the STM32F2. Documentation located in STM32F2xx Standard Peripheral
ashleymills 0:714293de3836 548 * Library document (See note in README).
ashleymills 0:714293de3836 549 */
ashleymills 0:714293de3836 550 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 551 {
ashleymills 0:714293de3836 552 int i;
ashleymills 0:714293de3836 553
ashleymills 0:714293de3836 554 /* enable RNG clock source */
ashleymills 0:714293de3836 555 RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
ashleymills 0:714293de3836 556
ashleymills 0:714293de3836 557 /* enable RNG peripheral */
ashleymills 0:714293de3836 558 RNG_Cmd(ENABLE);
ashleymills 0:714293de3836 559
ashleymills 0:714293de3836 560 for (i = 0; i < sz; i++) {
ashleymills 0:714293de3836 561 /* wait until RNG number is ready */
ashleymills 0:714293de3836 562 while(RNG_GetFlagStatus(RNG_FLAG_DRDY)== RESET) { }
ashleymills 0:714293de3836 563
ashleymills 0:714293de3836 564 /* get value */
ashleymills 0:714293de3836 565 output[i] = RNG_GetRandomNumber();
ashleymills 0:714293de3836 566 }
ashleymills 0:714293de3836 567
ashleymills 0:714293de3836 568 return 0;
ashleymills 0:714293de3836 569 }
ashleymills 0:714293de3836 570 #elif defined(CYASSL_LPC43xx) || defined(CYASSL_STM32F2xx)
ashleymills 0:714293de3836 571
ashleymills 0:714293de3836 572 #warning "write a real random seed!!!!, just for testing now"
ashleymills 0:714293de3836 573
ashleymills 0:714293de3836 574 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 575 {
ashleymills 0:714293de3836 576 int i;
ashleymills 0:714293de3836 577
ashleymills 0:714293de3836 578 for (i = 0; i < sz; i++ )
ashleymills 0:714293de3836 579 output[i] = i;
ashleymills 0:714293de3836 580
ashleymills 0:714293de3836 581 return 0;
ashleymills 0:714293de3836 582 }
ashleymills 0:714293de3836 583
ashleymills 0:714293de3836 584 #elif defined(NO_DEV_RANDOM)
ashleymills 0:714293de3836 585
ashleymills 0:714293de3836 586 #error "you need to write an os specific GenerateSeed() here"
ashleymills 0:714293de3836 587
ashleymills 0:714293de3836 588 /*
ashleymills 0:714293de3836 589 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 590 {
ashleymills 0:714293de3836 591 return 0;
ashleymills 0:714293de3836 592 }
ashleymills 0:714293de3836 593 */
ashleymills 0:714293de3836 594
ashleymills 0:714293de3836 595
ashleymills 0:714293de3836 596 #else /* !USE_WINDOWS_API && !HAVE_RPT_SYS && !MICRIUM && !NO_DEV_RANDOM */
ashleymills 0:714293de3836 597
ashleymills 0:714293de3836 598
ashleymills 0:714293de3836 599 /* may block */
ashleymills 0:714293de3836 600 int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
ashleymills 0:714293de3836 601 {
ashleymills 0:714293de3836 602 int ret = 0;
ashleymills 0:714293de3836 603
ashleymills 0:714293de3836 604 os->fd = open("/dev/urandom",O_RDONLY);
ashleymills 0:714293de3836 605 if (os->fd == -1) {
ashleymills 0:714293de3836 606 /* may still have /dev/random */
ashleymills 0:714293de3836 607 os->fd = open("/dev/random",O_RDONLY);
ashleymills 0:714293de3836 608 if (os->fd == -1)
ashleymills 0:714293de3836 609 return OPEN_RAN_E;
ashleymills 0:714293de3836 610 }
ashleymills 0:714293de3836 611
ashleymills 0:714293de3836 612 while (sz) {
ashleymills 0:714293de3836 613 int len = (int)read(os->fd, output, sz);
ashleymills 0:714293de3836 614 if (len == -1) {
ashleymills 0:714293de3836 615 ret = READ_RAN_E;
ashleymills 0:714293de3836 616 break;
ashleymills 0:714293de3836 617 }
ashleymills 0:714293de3836 618
ashleymills 0:714293de3836 619 sz -= len;
ashleymills 0:714293de3836 620 output += len;
ashleymills 0:714293de3836 621
ashleymills 0:714293de3836 622 if (sz) {
ashleymills 0:714293de3836 623 #ifdef BLOCKING
ashleymills 0:714293de3836 624 sleep(0); /* context switch */
ashleymills 0:714293de3836 625 #else
ashleymills 0:714293de3836 626 ret = RAN_BLOCK_E;
ashleymills 0:714293de3836 627 break;
ashleymills 0:714293de3836 628 #endif
ashleymills 0:714293de3836 629 }
ashleymills 0:714293de3836 630 }
ashleymills 0:714293de3836 631 close(os->fd);
ashleymills 0:714293de3836 632
ashleymills 0:714293de3836 633 return ret;
ashleymills 0:714293de3836 634 }
ashleymills 0:714293de3836 635
ashleymills 0:714293de3836 636 #endif /* USE_WINDOWS_API */
ashleymills 0:714293de3836 637