[352] | 1 | /* random.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2017 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL.
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| 6 | *
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| 7 | * wolfSSL is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * wolfSSL is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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| 20 | */
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| 21 |
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| 22 |
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| 23 | #ifdef HAVE_CONFIG_H
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| 24 | #include <config.h>
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| 25 | #endif
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| 26 |
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| 27 | #include <wolfssl/wolfcrypt/settings.h>
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| 28 |
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| 29 | /* on HPUX 11 you may need to install /dev/random see
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| 30 | http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I
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| 31 |
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| 32 | */
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| 33 |
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| 34 | #include <wolfssl/wolfcrypt/random.h>
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| 35 | #include <wolfssl/wolfcrypt/cpuid.h>
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| 36 |
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| 37 |
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| 38 | #ifdef HAVE_FIPS
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| 39 | int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz)
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| 40 | {
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| 41 | return GenerateSeed(os, seed, sz);
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| 42 | }
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| 43 |
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| 44 | int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId)
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| 45 | {
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| 46 | (void)heap;
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| 47 | (void)devId;
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| 48 | return InitRng_fips(rng);
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| 49 | }
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| 50 |
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| 51 | int wc_InitRng(WC_RNG* rng)
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| 52 | {
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| 53 | return InitRng_fips(rng);
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| 54 | }
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| 55 |
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| 56 |
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| 57 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* b, word32 sz)
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| 58 | {
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| 59 | return RNG_GenerateBlock_fips(rng, b, sz);
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| 60 | }
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| 61 |
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| 62 |
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| 63 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
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| 64 | {
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| 65 | return RNG_GenerateByte(rng, b);
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| 66 | }
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| 67 |
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| 68 | #ifdef HAVE_HASHDRBG
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| 69 |
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| 70 | int wc_FreeRng(WC_RNG* rng)
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| 71 | {
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| 72 | return FreeRng_fips(rng);
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| 73 | }
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| 74 |
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| 75 | int wc_RNG_HealthTest(int reseed,
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| 76 | const byte* entropyA, word32 entropyASz,
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| 77 | const byte* entropyB, word32 entropyBSz,
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| 78 | byte* output, word32 outputSz)
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| 79 | {
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| 80 | return RNG_HealthTest_fips(reseed, entropyA, entropyASz,
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| 81 | entropyB, entropyBSz, output, outputSz);
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| 82 | }
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| 83 | #endif /* HAVE_HASHDRBG */
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| 84 |
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| 85 | #else /* else build without fips */
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| 86 |
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| 87 | #ifndef WC_NO_RNG /* if not FIPS and RNG is disabled then do not compile */
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| 88 |
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| 89 | #include <wolfssl/wolfcrypt/error-crypt.h>
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| 90 | #include <wolfssl/wolfcrypt/sha256.h>
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| 91 |
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| 92 | #ifdef NO_INLINE
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| 93 | #include <wolfssl/wolfcrypt/misc.h>
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| 94 | #else
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| 95 | #define WOLFSSL_MISC_INCLUDED
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| 96 | #include <wolfcrypt/src/misc.c>
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| 97 | #endif
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| 98 |
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| 99 | #if defined(WOLFSSL_SGX)
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| 100 | #include <sgx_trts.h>
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| 101 | #elif defined(USE_WINDOWS_API)
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| 102 | #ifndef _WIN32_WINNT
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| 103 | #define _WIN32_WINNT 0x0400
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| 104 | #endif
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| 105 | #include <windows.h>
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| 106 | #include <wincrypt.h>
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| 107 | #elif defined(HAVE_WNR)
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| 108 | #include <wnr.h>
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| 109 | #include <wolfssl/wolfcrypt/logging.h>
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| 110 | wolfSSL_Mutex wnr_mutex; /* global netRandom mutex */
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| 111 | int wnr_timeout = 0; /* entropy timeout, mililseconds */
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| 112 | int wnr_mutex_init = 0; /* flag for mutex init */
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| 113 | wnr_context* wnr_ctx; /* global netRandom context */
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| 114 | #elif defined(FREESCALE_KSDK_2_0_TRNG)
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| 115 | #include "fsl_trng.h"
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| 116 | #elif defined(FREESCALE_KSDK_2_0_RNGA)
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| 117 | #include "fsl_rnga.h"
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| 118 |
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| 119 | #elif defined(NO_DEV_RANDOM)
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| 120 | #elif defined(CUSTOM_RAND_GENERATE)
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| 121 | #elif defined(CUSTOM_RAND_GENERATE_BLOCK)
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| 122 | #elif defined(CUSTOM_RAND_GENERATE_SEED)
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| 123 | #elif defined(WOLFSSL_GENSEED_FORTEST)
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| 124 | #elif defined(WOLFSSL_MDK_ARM)
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| 125 | #elif defined(WOLFSSL_IAR_ARM)
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| 126 | #elif defined(WOLFSSL_ROWLEY_ARM)
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| 127 | #elif defined(WOLFSSL_EMBOS)
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| 128 | #elif defined(MICRIUM)
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| 129 | #else
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| 130 | /* include headers that may be needed to get good seed */
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| 131 | #include <fcntl.h>
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| 132 | #ifndef EBSNET
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| 133 | #include <unistd.h>
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| 134 | #endif
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| 135 | #endif
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| 136 |
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| 137 |
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| 138 | #if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED)
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| 139 | static word32 intel_flags = 0;
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| 140 | static void wc_InitRng_IntelRD(void)
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| 141 | {
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| 142 | intel_flags = cpuid_get_flags();
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| 143 | }
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| 144 | #ifdef HAVE_INTEL_RDSEED
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| 145 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz);
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| 146 | #endif
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| 147 | #ifdef HAVE_INTEL_RDRAND
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| 148 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz);
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| 149 | #endif
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| 150 | #endif
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| 151 |
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| 152 | /* Start NIST DRBG code */
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| 153 | #ifdef HAVE_HASHDRBG
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| 154 |
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| 155 | #define OUTPUT_BLOCK_LEN (WC_SHA256_DIGEST_SIZE)
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| 156 | #define MAX_REQUEST_LEN (0x10000)
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| 157 | #define RESEED_INTERVAL WC_RESEED_INTERVAL
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| 158 | #define SECURITY_STRENGTH (256)
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| 159 | #define ENTROPY_SZ (SECURITY_STRENGTH/8)
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| 160 | #define NONCE_SZ (ENTROPY_SZ/2)
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| 161 | #define ENTROPY_NONCE_SZ (ENTROPY_SZ+NONCE_SZ)
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| 162 |
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| 163 | /* Internal return codes */
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| 164 | #define DRBG_SUCCESS 0
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| 165 | #define DRBG_ERROR 1
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| 166 | #define DRBG_FAILURE 2
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| 167 | #define DRBG_NEED_RESEED 3
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| 168 | #define DRBG_CONT_FAILURE 4
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| 169 |
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| 170 | /* RNG health states */
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| 171 | #define DRBG_NOT_INIT 0
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| 172 | #define DRBG_OK 1
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| 173 | #define DRBG_FAILED 2
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| 174 | #define DRBG_CONT_FAILED 3
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| 175 |
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| 176 | #define RNG_HEALTH_TEST_CHECK_SIZE (WC_SHA256_DIGEST_SIZE * 4)
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| 177 |
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| 178 | /* Verify max gen block len */
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| 179 | #if RNG_MAX_BLOCK_LEN > MAX_REQUEST_LEN
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| 180 | #error RNG_MAX_BLOCK_LEN is larger than NIST DBRG max request length
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| 181 | #endif
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| 182 |
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| 183 | enum {
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| 184 | drbgInitC = 0,
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| 185 | drbgReseed = 1,
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| 186 | drbgGenerateW = 2,
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| 187 | drbgGenerateH = 3,
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| 188 | drbgInitV
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| 189 | };
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| 190 |
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| 191 |
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| 192 | typedef struct DRBG {
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| 193 | word32 reseedCtr;
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| 194 | word32 lastBlock;
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| 195 | byte V[DRBG_SEED_LEN];
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| 196 | byte C[DRBG_SEED_LEN];
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| 197 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 198 | void* heap;
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| 199 | int devId;
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| 200 | #endif
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| 201 | byte matchCount;
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| 202 | } DRBG;
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| 203 |
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| 204 |
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| 205 | static int wc_RNG_HealthTestLocal(int reseed);
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| 206 |
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| 207 | /* Hash Derivation Function */
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| 208 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
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| 209 | static int Hash_df(DRBG* drbg, byte* out, word32 outSz, byte type,
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| 210 | const byte* inA, word32 inASz,
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| 211 | const byte* inB, word32 inBSz)
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| 212 | {
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| 213 | int ret = DRBG_FAILURE;
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| 214 | byte ctr;
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| 215 | int i;
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| 216 | int len;
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| 217 | word32 bits = (outSz * 8); /* reverse byte order */
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| 218 | wc_Sha256 sha;
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| 219 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
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| 220 |
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| 221 | (void)drbg;
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| 222 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 223 | if (digest == NULL)
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| 224 | return DRBG_FAILURE;
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| 225 | #endif
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| 226 |
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| 227 | #ifdef LITTLE_ENDIAN_ORDER
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| 228 | bits = ByteReverseWord32(bits);
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| 229 | #endif
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| 230 | len = (outSz / OUTPUT_BLOCK_LEN)
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| 231 | + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
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| 232 |
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| 233 | for (i = 0, ctr = 1; i < len; i++, ctr++) {
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| 234 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 235 | ret = wc_InitSha256_ex(&sha, drbg->heap, drbg->devId);
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| 236 | #else
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| 237 | ret = wc_InitSha256(&sha);
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| 238 | #endif
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| 239 | if (ret != 0)
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| 240 | break;
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| 241 |
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| 242 | if (ret == 0)
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| 243 | ret = wc_Sha256Update(&sha, &ctr, sizeof(ctr));
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| 244 | if (ret == 0)
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| 245 | ret = wc_Sha256Update(&sha, (byte*)&bits, sizeof(bits));
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| 246 |
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| 247 | if (ret == 0) {
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| 248 | /* churning V is the only string that doesn't have the type added */
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| 249 | if (type != drbgInitV)
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| 250 | ret = wc_Sha256Update(&sha, &type, sizeof(type));
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| 251 | }
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| 252 | if (ret == 0)
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| 253 | ret = wc_Sha256Update(&sha, inA, inASz);
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| 254 | if (ret == 0) {
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| 255 | if (inB != NULL && inBSz > 0)
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| 256 | ret = wc_Sha256Update(&sha, inB, inBSz);
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| 257 | }
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| 258 | if (ret == 0)
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| 259 | ret = wc_Sha256Final(&sha, digest);
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| 260 |
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| 261 | wc_Sha256Free(&sha);
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| 262 | if (ret == 0) {
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| 263 | if (outSz > OUTPUT_BLOCK_LEN) {
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| 264 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
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| 265 | outSz -= OUTPUT_BLOCK_LEN;
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| 266 | out += OUTPUT_BLOCK_LEN;
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| 267 | }
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| 268 | else {
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| 269 | XMEMCPY(out, digest, outSz);
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| 270 | }
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| 271 | }
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| 272 | }
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| 273 |
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| 274 | ForceZero(digest, WC_SHA256_DIGEST_SIZE);
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| 275 |
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| 276 | FREE_VAR(digest, drbg->heap);
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| 277 |
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| 278 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
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| 279 | }
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| 280 |
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| 281 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
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| 282 | static int Hash_DRBG_Reseed(DRBG* drbg, const byte* entropy, word32 entropySz)
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| 283 | {
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| 284 | byte seed[DRBG_SEED_LEN];
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| 285 |
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| 286 | if (Hash_df(drbg, seed, sizeof(seed), drbgReseed, drbg->V, sizeof(drbg->V),
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| 287 | entropy, entropySz) != DRBG_SUCCESS) {
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| 288 | return DRBG_FAILURE;
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| 289 | }
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| 290 |
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| 291 | XMEMCPY(drbg->V, seed, sizeof(drbg->V));
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| 292 | ForceZero(seed, sizeof(seed));
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| 293 |
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| 294 | if (Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
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| 295 | sizeof(drbg->V), NULL, 0) != DRBG_SUCCESS) {
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| 296 | return DRBG_FAILURE;
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| 297 | }
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| 298 |
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| 299 | drbg->reseedCtr = 1;
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| 300 | drbg->lastBlock = 0;
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| 301 | drbg->matchCount = 0;
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| 302 | return DRBG_SUCCESS;
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| 303 | }
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| 304 |
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| 305 | static INLINE void array_add_one(byte* data, word32 dataSz)
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| 306 | {
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| 307 | int i;
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| 308 |
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| 309 | for (i = dataSz - 1; i >= 0; i--)
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| 310 | {
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| 311 | data[i]++;
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| 312 | if (data[i] != 0) break;
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| 313 | }
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| 314 | }
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| 315 |
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| 316 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
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| 317 | static int Hash_gen(DRBG* drbg, byte* out, word32 outSz, const byte* V)
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| 318 | {
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| 319 | int ret = DRBG_FAILURE;
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| 320 | byte data[DRBG_SEED_LEN];
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| 321 | int i;
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| 322 | int len;
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| 323 | word32 checkBlock;
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| 324 | wc_Sha256 sha;
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| 325 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
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| 326 |
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| 327 | /* Special case: outSz is 0 and out is NULL. wc_Generate a block to save for
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| 328 | * the continuous test. */
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| 329 |
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| 330 | if (outSz == 0) outSz = 1;
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| 331 |
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| 332 | len = (outSz / OUTPUT_BLOCK_LEN) + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
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| 333 |
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| 334 | XMEMCPY(data, V, sizeof(data));
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| 335 | for (i = 0; i < len; i++) {
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| 336 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 337 | ret = wc_InitSha256_ex(&sha, drbg->heap, drbg->devId);
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| 338 | #else
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| 339 | ret = wc_InitSha256(&sha);
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| 340 | #endif
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| 341 | if (ret == 0)
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| 342 | ret = wc_Sha256Update(&sha, data, sizeof(data));
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| 343 | if (ret == 0)
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| 344 | ret = wc_Sha256Final(&sha, digest);
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| 345 | wc_Sha256Free(&sha);
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| 346 |
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| 347 | if (ret == 0) {
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| 348 | XMEMCPY(&checkBlock, digest, sizeof(word32));
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| 349 | if (drbg->reseedCtr > 1 && checkBlock == drbg->lastBlock) {
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| 350 | if (drbg->matchCount == 1) {
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| 351 | return DRBG_CONT_FAILURE;
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| 352 | }
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| 353 | else {
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| 354 | if (i == len) {
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| 355 | len++;
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| 356 | }
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| 357 | drbg->matchCount = 1;
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| 358 | }
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| 359 | }
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| 360 | else {
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| 361 | drbg->matchCount = 0;
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| 362 | drbg->lastBlock = checkBlock;
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| 363 | }
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| 364 |
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| 365 | if (out != NULL && outSz != 0) {
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| 366 | if (outSz >= OUTPUT_BLOCK_LEN) {
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| 367 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
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| 368 | outSz -= OUTPUT_BLOCK_LEN;
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| 369 | out += OUTPUT_BLOCK_LEN;
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| 370 | array_add_one(data, DRBG_SEED_LEN);
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| 371 | }
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| 372 | else {
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| 373 | XMEMCPY(out, digest, outSz);
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| 374 | outSz = 0;
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| 375 | }
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| 376 | }
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| 377 | }
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| 378 | }
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| 379 | ForceZero(data, sizeof(data));
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| 380 |
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| 381 | FREE_VAR(digest, drbg->heap);
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| 382 |
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| 383 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
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| 384 | }
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| 385 |
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| 386 | static INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen)
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| 387 | {
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| 388 | word16 carry = 0;
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| 389 |
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| 390 | if (dLen > 0 && sLen > 0 && dLen >= sLen) {
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| 391 | int sIdx, dIdx;
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| 392 |
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| 393 | for (sIdx = sLen - 1, dIdx = dLen - 1; sIdx >= 0; dIdx--, sIdx--)
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| 394 | {
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| 395 | carry += d[dIdx] + s[sIdx];
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| 396 | d[dIdx] = (byte)carry;
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| 397 | carry >>= 8;
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| 398 | }
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| 399 |
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| 400 | for (; carry != 0 && dIdx >= 0; dIdx--) {
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| 401 | carry += d[dIdx];
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| 402 | d[dIdx] = (byte)carry;
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| 403 | carry >>= 8;
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| 404 | }
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| 405 | }
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| 406 | }
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| 407 |
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| 408 | /* Returns: DRBG_SUCCESS, DRBG_NEED_RESEED, or DRBG_FAILURE */
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| 409 | static int Hash_DRBG_Generate(DRBG* drbg, byte* out, word32 outSz)
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| 410 | {
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| 411 | int ret;
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| 412 | wc_Sha256 sha;
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| 413 | byte type;
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| 414 | word32 reseedCtr;
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| 415 |
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| 416 | if (drbg->reseedCtr == RESEED_INTERVAL) {
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| 417 | return DRBG_NEED_RESEED;
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| 418 | } else {
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| 419 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
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| 420 | type = drbgGenerateH;
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| 421 | reseedCtr = drbg->reseedCtr;
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| 422 |
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| 423 | ret = Hash_gen(drbg, out, outSz, drbg->V);
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| 424 | if (ret == DRBG_SUCCESS) {
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| 425 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 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 */
|
---|