[457] | 1 | /* random.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2020 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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[464] | 22 | /*
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[457] | 23 |
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[464] | 24 | DESCRIPTION
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| 25 | This library contains implementation for the random number generator.
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| 26 |
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| 27 | */
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[457] | 28 | #ifdef HAVE_CONFIG_H
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| 29 | #include <config.h>
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| 30 | #endif
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| 31 |
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| 32 | #include <wolfssl/wolfcrypt/settings.h>
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| 33 | #include <wolfssl/wolfcrypt/error-crypt.h>
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| 34 |
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| 35 | /* on HPUX 11 you may need to install /dev/random see
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| 36 | http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I
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| 37 |
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| 38 | */
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| 39 |
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| 40 | #if defined(HAVE_FIPS) && \
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| 41 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
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| 42 |
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| 43 | /* set NO_WRAPPERS before headers, use direct internal f()s not wrappers */
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| 44 | #define FIPS_NO_WRAPPERS
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| 45 |
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| 46 | #ifdef USE_WINDOWS_API
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| 47 | #pragma code_seg(".fipsA$c")
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| 48 | #pragma const_seg(".fipsB$c")
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| 49 | #endif
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| 50 | #endif
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| 51 |
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| 52 |
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| 53 | #include <wolfssl/wolfcrypt/random.h>
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| 54 | #include <wolfssl/wolfcrypt/cpuid.h>
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| 55 |
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| 56 |
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| 57 | /* If building for old FIPS. */
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| 58 | #if defined(HAVE_FIPS) && \
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| 59 | (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
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| 60 |
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| 61 | int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz)
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| 62 | {
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| 63 | return GenerateSeed(os, seed, sz);
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| 64 | }
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| 65 |
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| 66 | int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId)
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| 67 | {
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| 68 | (void)heap;
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| 69 | (void)devId;
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| 70 | return InitRng_fips(rng);
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| 71 | }
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| 72 |
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| 73 | int wc_InitRng(WC_RNG* rng)
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| 74 | {
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| 75 | return InitRng_fips(rng);
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| 76 | }
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| 77 |
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| 78 |
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| 79 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* b, word32 sz)
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| 80 | {
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| 81 | return RNG_GenerateBlock_fips(rng, b, sz);
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| 82 | }
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| 83 |
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| 84 |
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| 85 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
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| 86 | {
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| 87 | return RNG_GenerateByte(rng, b);
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| 88 | }
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| 89 |
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| 90 | #ifdef HAVE_HASHDRBG
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| 91 |
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| 92 | int wc_FreeRng(WC_RNG* rng)
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| 93 | {
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| 94 | return FreeRng_fips(rng);
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| 95 | }
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| 96 |
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| 97 | int wc_RNG_HealthTest(int reseed, const byte* seedA, word32 seedASz,
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| 98 | const byte* seedB, word32 seedBSz,
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| 99 | byte* output, word32 outputSz)
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| 100 | {
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| 101 | return RNG_HealthTest_fips(reseed, seedA, seedASz,
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| 102 | seedB, seedBSz, output, outputSz);
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| 103 | }
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| 104 | #endif /* HAVE_HASHDRBG */
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| 105 |
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| 106 | #else /* else build without fips, or for new fips */
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| 107 |
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| 108 | #ifndef WC_NO_RNG /* if not FIPS and RNG is disabled then do not compile */
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| 109 |
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| 110 | #include <wolfssl/wolfcrypt/sha256.h>
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| 111 |
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| 112 | #ifdef WOLF_CRYPTO_CB
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| 113 | #include <wolfssl/wolfcrypt/cryptocb.h>
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| 114 | #endif
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| 115 |
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| 116 | #ifdef NO_INLINE
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| 117 | #include <wolfssl/wolfcrypt/misc.h>
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| 118 | #else
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| 119 | #define WOLFSSL_MISC_INCLUDED
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| 120 | #include <wolfcrypt/src/misc.c>
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| 121 | #endif
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| 122 |
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| 123 | #if defined(WOLFSSL_SGX)
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| 124 | #include <sgx_trts.h>
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| 125 | #elif defined(USE_WINDOWS_API)
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| 126 | #ifndef _WIN32_WINNT
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| 127 | #define _WIN32_WINNT 0x0400
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| 128 | #endif
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| 129 | #include <windows.h>
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| 130 | #include <wincrypt.h>
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| 131 | #elif defined(HAVE_WNR)
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| 132 | #include <wnr.h>
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| 133 | #include <wolfssl/wolfcrypt/logging.h>
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| 134 | wolfSSL_Mutex wnr_mutex; /* global netRandom mutex */
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| 135 | int wnr_timeout = 0; /* entropy timeout, mililseconds */
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| 136 | int wnr_mutex_init = 0; /* flag for mutex init */
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| 137 | wnr_context* wnr_ctx; /* global netRandom context */
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| 138 | #elif defined(FREESCALE_KSDK_2_0_TRNG)
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| 139 | #include "fsl_trng.h"
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| 140 | #elif defined(FREESCALE_KSDK_2_0_RNGA)
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| 141 | #include "fsl_rnga.h"
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| 142 | #elif defined(WOLFSSL_WICED)
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| 143 | #include "wiced_crypto.h"
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| 144 | #elif defined(WOLFSSL_NETBURNER)
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| 145 | #include <predef.h>
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| 146 | #include <basictypes.h>
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| 147 | #include <random.h>
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| 148 | #elif defined(NO_DEV_RANDOM)
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| 149 | #elif defined(CUSTOM_RAND_GENERATE)
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| 150 | #elif defined(CUSTOM_RAND_GENERATE_BLOCK)
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| 151 | #elif defined(CUSTOM_RAND_GENERATE_SEED)
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| 152 | #elif defined(WOLFSSL_GENSEED_FORTEST)
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| 153 | #elif defined(WOLFSSL_MDK_ARM)
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| 154 | #elif defined(WOLFSSL_IAR_ARM)
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| 155 | #elif defined(WOLFSSL_ROWLEY_ARM)
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| 156 | #elif defined(WOLFSSL_EMBOS)
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| 157 | #elif defined(WOLFSSL_DEOS)
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| 158 | #elif defined(MICRIUM)
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| 159 | #elif defined(WOLFSSL_NUCLEUS)
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| 160 | #elif defined(WOLFSSL_PB)
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| 161 | #elif defined(WOLFSSL_ZEPHYR)
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| 162 | #elif defined(WOLFSSL_TELIT_M2MB)
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| 163 | #elif defined(WOLFSSL_SCE) && !defined(WOLFSSL_SCE_NO_TRNG)
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| 164 | #else
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| 165 | /* include headers that may be needed to get good seed */
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| 166 | #include <fcntl.h>
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| 167 | #ifndef EBSNET
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| 168 | #include <unistd.h>
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| 169 | #endif
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| 170 | #endif
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| 171 |
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[464] | 172 | #if defined(WOLFSSL_SILABS_SE_ACCEL)
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| 173 | #include <wolfssl/wolfcrypt/port/silabs/silabs_random.h>
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| 174 | #endif
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[457] | 175 |
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[464] | 176 |
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[457] | 177 | #if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED)
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| 178 | static word32 intel_flags = 0;
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| 179 | static void wc_InitRng_IntelRD(void)
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| 180 | {
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| 181 | intel_flags = cpuid_get_flags();
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| 182 | }
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[464] | 183 | #if defined(HAVE_INTEL_RDSEED) && !defined(WOLFSSL_LINUXKM)
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[457] | 184 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz);
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| 185 | #endif
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| 186 | #ifdef HAVE_INTEL_RDRAND
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| 187 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz);
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| 188 | #endif
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| 189 |
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| 190 | #ifdef USE_WINDOWS_API
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[464] | 191 | #define USE_INTEL_INTRINSICS
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| 192 | #elif !defined __GNUC__ || defined __clang__ || __GNUC__ > 4
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| 193 | #define USE_INTEL_INTRINSICS
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| 194 | #else
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| 195 | #undef USE_INTEL_INTRINSICS
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| 196 | #endif
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| 197 |
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| 198 | #ifdef USE_INTEL_INTRINSICS
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[457] | 199 | #include <immintrin.h>
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[464] | 200 | /* Before clang 7 or GCC 9, immintrin.h did not define _rdseed64_step() */
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| 201 | #ifndef HAVE_INTEL_RDSEED
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| 202 | #elif defined __clang__ && __clang_major__ > 6
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| 203 | #elif !defined __GNUC__
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| 204 | #elif __GNUC__ > 8
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| 205 | #else
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| 206 | #ifndef __clang__
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| 207 | #pragma GCC push_options
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| 208 | #pragma GCC target("rdseed")
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| 209 | #else
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| 210 | #define __RDSEED__
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| 211 | #endif
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| 212 | #include <x86intrin.h>
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| 213 | #ifndef __clang__
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| 214 | #pragma GCC pop_options
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| 215 | #endif
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| 216 | #endif
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[457] | 217 | #endif /* USE_WINDOWS_API */
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| 218 | #endif
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| 219 |
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| 220 | /* Start NIST DRBG code */
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| 221 | #ifdef HAVE_HASHDRBG
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| 222 |
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| 223 | #define OUTPUT_BLOCK_LEN (WC_SHA256_DIGEST_SIZE)
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| 224 | #define MAX_REQUEST_LEN (0x10000)
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| 225 | #define RESEED_INTERVAL WC_RESEED_INTERVAL
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| 226 |
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| 227 |
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| 228 | /* For FIPS builds, the user should not be adjusting the values. */
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| 229 | #if defined(HAVE_FIPS) && \
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| 230 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
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| 231 | #if defined(RNG_SECURITY_STRENGTH) \
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| 232 | || defined(ENTROPY_SCALE_FACTOR) \
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| 233 | || defined(SEED_BLOCK_SZ)
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| 234 |
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| 235 | #error "Do not change the RNG parameters for FIPS builds."
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| 236 | #endif
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| 237 | #endif
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| 238 |
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| 239 |
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| 240 | /* The security strength for the RNG is the target number of bits of
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| 241 | * entropy you are looking for in a seed. */
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| 242 | #ifndef RNG_SECURITY_STRENGTH
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| 243 | #if defined(HAVE_FIPS) && \
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| 244 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
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| 245 | /* SHA-256 requires a minimum of 256-bits of entropy. The goal
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| 246 | * of 1024 will provide 4 times that. */
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| 247 | #define RNG_SECURITY_STRENGTH (1024)
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| 248 | #else
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| 249 | /* If not using FIPS or using old FIPS, set the number down a bit.
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| 250 | * More is better, but more is also slower. */
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| 251 | #define RNG_SECURITY_STRENGTH (256)
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| 252 | #endif
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| 253 | #endif
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| 254 |
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| 255 | #ifndef ENTROPY_SCALE_FACTOR
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| 256 | /* The entropy scale factor should be the whole number inverse of the
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| 257 | * minimum bits of entropy per bit of NDRNG output. */
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| 258 | #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
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| 259 | /* The value of 2 applies to Intel's RDSEED which provides about
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| 260 | * 0.5 bits minimum of entropy per bit. */
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| 261 | #define ENTROPY_SCALE_FACTOR 2
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| 262 | #else
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| 263 | /* Setting the default to 1. */
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| 264 | #define ENTROPY_SCALE_FACTOR 1
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| 265 | #endif
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| 266 | #endif
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| 267 |
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| 268 | #ifndef SEED_BLOCK_SZ
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| 269 | /* The seed block size, is the size of the output of the underlying NDRNG.
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| 270 | * This value is used for testing the output of the NDRNG. */
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| 271 | #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
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| 272 | /* RDSEED outputs in blocks of 64-bits. */
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| 273 | #define SEED_BLOCK_SZ sizeof(word64)
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| 274 | #else
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| 275 | /* Setting the default to 4. */
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| 276 | #define SEED_BLOCK_SZ 4
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| 277 | #endif
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| 278 | #endif
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| 279 |
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| 280 | #define SEED_SZ (RNG_SECURITY_STRENGTH*ENTROPY_SCALE_FACTOR/8)
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| 281 |
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| 282 | /* The maximum seed size will be the seed size plus a seed block for the
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| 283 | * test, and an additional half of the seed size. This additional half
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| 284 | * is in case the user does not supply a nonce. A nonce will be obtained
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| 285 | * from the NDRNG. */
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| 286 | #define MAX_SEED_SZ (SEED_SZ + SEED_SZ/2 + SEED_BLOCK_SZ)
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| 287 |
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| 288 |
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| 289 | /* Internal return codes */
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| 290 | #define DRBG_SUCCESS 0
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| 291 | #define DRBG_FAILURE 1
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| 292 | #define DRBG_NEED_RESEED 2
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| 293 | #define DRBG_CONT_FAILURE 3
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| 294 |
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| 295 | /* RNG health states */
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| 296 | #define DRBG_NOT_INIT 0
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| 297 | #define DRBG_OK 1
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| 298 | #define DRBG_FAILED 2
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| 299 | #define DRBG_CONT_FAILED 3
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| 300 |
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| 301 | #define RNG_HEALTH_TEST_CHECK_SIZE (WC_SHA256_DIGEST_SIZE * 4)
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| 302 |
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| 303 | /* Verify max gen block len */
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| 304 | #if RNG_MAX_BLOCK_LEN > MAX_REQUEST_LEN
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| 305 | #error RNG_MAX_BLOCK_LEN is larger than NIST DBRG max request length
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| 306 | #endif
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| 307 |
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| 308 | enum {
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| 309 | drbgInitC = 0,
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| 310 | drbgReseed = 1,
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| 311 | drbgGenerateW = 2,
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| 312 | drbgGenerateH = 3,
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| 313 | drbgInitV
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| 314 | };
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| 315 |
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[464] | 316 | typedef struct DRBG_internal DRBG_internal;
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[457] | 317 |
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| 318 | static int wc_RNG_HealthTestLocal(int reseed);
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| 319 |
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| 320 | /* Hash Derivation Function */
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| 321 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
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[464] | 322 | static int Hash_df(DRBG_internal* drbg, byte* out, word32 outSz, byte type,
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[457] | 323 | const byte* inA, word32 inASz,
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| 324 | const byte* inB, word32 inBSz)
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| 325 | {
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| 326 | int ret = DRBG_FAILURE;
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| 327 | byte ctr;
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| 328 | int i;
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| 329 | int len;
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| 330 | word32 bits = (outSz * 8); /* reverse byte order */
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| 331 | #ifdef WOLFSSL_SMALL_STACK_CACHE
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| 332 | wc_Sha256* sha = &drbg->sha256;
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| 333 | #else
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| 334 | wc_Sha256 sha[1];
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| 335 | #endif
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| 336 | #ifdef WC_ASYNC_ENABLE_SHA256
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| 337 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
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| 338 | if (digest == NULL)
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| 339 | return MEMORY_E;
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| 340 | #else
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| 341 | byte digest[WC_SHA256_DIGEST_SIZE];
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| 342 | #endif
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| 343 |
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| 344 | (void)drbg;
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| 345 | #ifdef WC_ASYNC_ENABLE_SHA256
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| 346 | if (digest == NULL)
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| 347 | return DRBG_FAILURE;
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| 348 | #endif
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| 349 |
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| 350 | #ifdef LITTLE_ENDIAN_ORDER
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| 351 | bits = ByteReverseWord32(bits);
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| 352 | #endif
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| 353 | len = (outSz / OUTPUT_BLOCK_LEN)
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| 354 | + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
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| 355 |
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| 356 | for (i = 0, ctr = 1; i < len; i++, ctr++) {
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| 357 | #ifndef WOLFSSL_SMALL_STACK_CACHE
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| 358 | #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
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| 359 | ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId);
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| 360 | #else
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| 361 | ret = wc_InitSha256(sha);
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| 362 | #endif
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| 363 | if (ret != 0)
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| 364 | break;
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| 365 |
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| 366 | if (ret == 0)
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| 367 | #endif
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| 368 | ret = wc_Sha256Update(sha, &ctr, sizeof(ctr));
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| 369 | if (ret == 0)
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| 370 | ret = wc_Sha256Update(sha, (byte*)&bits, sizeof(bits));
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| 371 |
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| 372 | if (ret == 0) {
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| 373 | /* churning V is the only string that doesn't have the type added */
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| 374 | if (type != drbgInitV)
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| 375 | ret = wc_Sha256Update(sha, &type, sizeof(type));
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| 376 | }
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| 377 | if (ret == 0)
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| 378 | ret = wc_Sha256Update(sha, inA, inASz);
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| 379 | if (ret == 0) {
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| 380 | if (inB != NULL && inBSz > 0)
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| 381 | ret = wc_Sha256Update(sha, inB, inBSz);
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| 382 | }
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| 383 | if (ret == 0)
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| 384 | ret = wc_Sha256Final(sha, digest);
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| 385 |
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| 386 | #ifndef WOLFSSL_SMALL_STACK_CACHE
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| 387 | wc_Sha256Free(sha);
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| 388 | #endif
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| 389 | if (ret == 0) {
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| 390 | if (outSz > OUTPUT_BLOCK_LEN) {
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| 391 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
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| 392 | outSz -= OUTPUT_BLOCK_LEN;
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| 393 | out += OUTPUT_BLOCK_LEN;
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| 394 | }
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| 395 | else {
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| 396 | XMEMCPY(out, digest, outSz);
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| 397 | }
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| 398 | }
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| 399 | }
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| 400 |
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| 401 | ForceZero(digest, WC_SHA256_DIGEST_SIZE);
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| 402 |
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| 403 | #ifdef WC_ASYNC_ENABLE_SHA256
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| 404 | FREE_VAR(digest, drbg->heap);
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| 405 | #endif
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| 406 |
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| 407 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
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| 408 | }
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| 409 |
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| 410 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
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[464] | 411 | static int Hash_DRBG_Reseed(DRBG_internal* drbg, const byte* seed, word32 seedSz)
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[457] | 412 | {
|
---|
| 413 | byte newV[DRBG_SEED_LEN];
|
---|
| 414 |
|
---|
| 415 | XMEMSET(newV, 0, DRBG_SEED_LEN);
|
---|
| 416 |
|
---|
| 417 | if (Hash_df(drbg, newV, sizeof(newV), drbgReseed,
|
---|
| 418 | drbg->V, sizeof(drbg->V), seed, seedSz) != DRBG_SUCCESS) {
|
---|
| 419 | return DRBG_FAILURE;
|
---|
| 420 | }
|
---|
| 421 |
|
---|
| 422 | XMEMCPY(drbg->V, newV, sizeof(drbg->V));
|
---|
| 423 | ForceZero(newV, sizeof(newV));
|
---|
| 424 |
|
---|
| 425 | if (Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
| 426 | sizeof(drbg->V), NULL, 0) != DRBG_SUCCESS) {
|
---|
| 427 | return DRBG_FAILURE;
|
---|
| 428 | }
|
---|
| 429 |
|
---|
| 430 | drbg->reseedCtr = 1;
|
---|
| 431 | drbg->lastBlock = 0;
|
---|
| 432 | drbg->matchCount = 0;
|
---|
| 433 | return DRBG_SUCCESS;
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | /* Returns: DRBG_SUCCESS and DRBG_FAILURE or BAD_FUNC_ARG on fail */
|
---|
| 437 | int wc_RNG_DRBG_Reseed(WC_RNG* rng, const byte* seed, word32 seedSz)
|
---|
| 438 | {
|
---|
| 439 | if (rng == NULL || seed == NULL) {
|
---|
| 440 | return BAD_FUNC_ARG;
|
---|
| 441 | }
|
---|
| 442 |
|
---|
[464] | 443 | return Hash_DRBG_Reseed((DRBG_internal *)rng->drbg, seed, seedSz);
|
---|
[457] | 444 | }
|
---|
| 445 |
|
---|
| 446 | static WC_INLINE void array_add_one(byte* data, word32 dataSz)
|
---|
| 447 | {
|
---|
| 448 | int i;
|
---|
| 449 |
|
---|
| 450 | for (i = dataSz - 1; i >= 0; i--)
|
---|
| 451 | {
|
---|
| 452 | data[i]++;
|
---|
| 453 | if (data[i] != 0) break;
|
---|
| 454 | }
|
---|
| 455 | }
|
---|
| 456 |
|
---|
| 457 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
[464] | 458 | static int Hash_gen(DRBG_internal* drbg, byte* out, word32 outSz, const byte* V)
|
---|
[457] | 459 | {
|
---|
| 460 | int ret = DRBG_FAILURE;
|
---|
| 461 | byte data[DRBG_SEED_LEN];
|
---|
| 462 | int i;
|
---|
| 463 | int len;
|
---|
| 464 | word32 checkBlock;
|
---|
| 465 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 466 | wc_Sha256* sha = &drbg->sha256;
|
---|
| 467 | #else
|
---|
| 468 | wc_Sha256 sha[1];
|
---|
| 469 | #endif
|
---|
| 470 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
| 471 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
| 472 | if (digest == NULL)
|
---|
| 473 | return MEMORY_E;
|
---|
| 474 | #else
|
---|
| 475 | byte digest[WC_SHA256_DIGEST_SIZE];
|
---|
| 476 | #endif
|
---|
| 477 |
|
---|
| 478 | /* Special case: outSz is 0 and out is NULL. wc_Generate a block to save for
|
---|
| 479 | * the continuous test. */
|
---|
| 480 |
|
---|
| 481 | if (outSz == 0) outSz = 1;
|
---|
| 482 |
|
---|
| 483 | len = (outSz / OUTPUT_BLOCK_LEN) + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0);
|
---|
| 484 |
|
---|
| 485 | XMEMCPY(data, V, sizeof(data));
|
---|
| 486 | for (i = 0; i < len; i++) {
|
---|
| 487 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 488 | #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
|
---|
| 489 | ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId);
|
---|
| 490 | #else
|
---|
| 491 | ret = wc_InitSha256(sha);
|
---|
| 492 | #endif
|
---|
| 493 | if (ret == 0)
|
---|
| 494 | #endif
|
---|
| 495 | ret = wc_Sha256Update(sha, data, sizeof(data));
|
---|
| 496 | if (ret == 0)
|
---|
| 497 | ret = wc_Sha256Final(sha, digest);
|
---|
| 498 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 499 | wc_Sha256Free(sha);
|
---|
| 500 | #endif
|
---|
| 501 |
|
---|
| 502 | if (ret == 0) {
|
---|
| 503 | XMEMCPY(&checkBlock, digest, sizeof(word32));
|
---|
| 504 | if (drbg->reseedCtr > 1 && checkBlock == drbg->lastBlock) {
|
---|
| 505 | if (drbg->matchCount == 1) {
|
---|
| 506 | return DRBG_CONT_FAILURE;
|
---|
| 507 | }
|
---|
| 508 | else {
|
---|
[464] | 509 | if (i == (len-1)) {
|
---|
[457] | 510 | len++;
|
---|
| 511 | }
|
---|
| 512 | drbg->matchCount = 1;
|
---|
| 513 | }
|
---|
| 514 | }
|
---|
| 515 | else {
|
---|
| 516 | drbg->matchCount = 0;
|
---|
| 517 | drbg->lastBlock = checkBlock;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | if (out != NULL && outSz != 0) {
|
---|
| 521 | if (outSz >= OUTPUT_BLOCK_LEN) {
|
---|
| 522 | XMEMCPY(out, digest, OUTPUT_BLOCK_LEN);
|
---|
| 523 | outSz -= OUTPUT_BLOCK_LEN;
|
---|
| 524 | out += OUTPUT_BLOCK_LEN;
|
---|
| 525 | array_add_one(data, DRBG_SEED_LEN);
|
---|
| 526 | }
|
---|
| 527 | else {
|
---|
| 528 | XMEMCPY(out, digest, outSz);
|
---|
| 529 | outSz = 0;
|
---|
| 530 | }
|
---|
| 531 | }
|
---|
| 532 | }
|
---|
[464] | 533 | else {
|
---|
| 534 | /* wc_Sha256Update or wc_Sha256Final returned error */
|
---|
| 535 | break;
|
---|
| 536 | }
|
---|
[457] | 537 | }
|
---|
| 538 | ForceZero(data, sizeof(data));
|
---|
| 539 |
|
---|
| 540 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
| 541 | FREE_VAR(digest, drbg->heap);
|
---|
| 542 | #endif
|
---|
| 543 |
|
---|
| 544 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
| 545 | }
|
---|
| 546 |
|
---|
| 547 | static WC_INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen)
|
---|
| 548 | {
|
---|
| 549 | word16 carry = 0;
|
---|
| 550 |
|
---|
| 551 | if (dLen > 0 && sLen > 0 && dLen >= sLen) {
|
---|
| 552 | int sIdx, dIdx;
|
---|
| 553 |
|
---|
[464] | 554 | for (sIdx = sLen - 1, dIdx = dLen - 1; sIdx >= 0; dIdx--, sIdx--) {
|
---|
| 555 | carry += (word16)d[dIdx] + (word16)s[sIdx];
|
---|
[457] | 556 | d[dIdx] = (byte)carry;
|
---|
| 557 | carry >>= 8;
|
---|
| 558 | }
|
---|
| 559 |
|
---|
| 560 | for (; carry != 0 && dIdx >= 0; dIdx--) {
|
---|
[464] | 561 | carry += (word16)d[dIdx];
|
---|
[457] | 562 | d[dIdx] = (byte)carry;
|
---|
| 563 | carry >>= 8;
|
---|
| 564 | }
|
---|
| 565 | }
|
---|
| 566 | }
|
---|
| 567 |
|
---|
| 568 | /* Returns: DRBG_SUCCESS, DRBG_NEED_RESEED, or DRBG_FAILURE */
|
---|
[464] | 569 | static int Hash_DRBG_Generate(DRBG_internal* drbg, byte* out, word32 outSz)
|
---|
[457] | 570 | {
|
---|
| 571 | int ret;
|
---|
| 572 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 573 | wc_Sha256* sha = &drbg->sha256;
|
---|
| 574 | #else
|
---|
| 575 | wc_Sha256 sha[1];
|
---|
| 576 | #endif
|
---|
| 577 | byte type;
|
---|
| 578 | word32 reseedCtr;
|
---|
| 579 |
|
---|
| 580 | if (drbg->reseedCtr == RESEED_INTERVAL) {
|
---|
| 581 | return DRBG_NEED_RESEED;
|
---|
| 582 | } else {
|
---|
| 583 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
| 584 | DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap);
|
---|
| 585 | if (digest == NULL)
|
---|
| 586 | return MEMORY_E;
|
---|
| 587 | #else
|
---|
| 588 | byte digest[WC_SHA256_DIGEST_SIZE];
|
---|
| 589 | #endif
|
---|
| 590 | type = drbgGenerateH;
|
---|
| 591 | reseedCtr = drbg->reseedCtr;
|
---|
| 592 |
|
---|
| 593 | ret = Hash_gen(drbg, out, outSz, drbg->V);
|
---|
| 594 | if (ret == DRBG_SUCCESS) {
|
---|
| 595 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 596 | #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
|
---|
| 597 | ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId);
|
---|
| 598 | #else
|
---|
| 599 | ret = wc_InitSha256(sha);
|
---|
| 600 | #endif
|
---|
| 601 | if (ret == 0)
|
---|
| 602 | #endif
|
---|
| 603 | ret = wc_Sha256Update(sha, &type, sizeof(type));
|
---|
| 604 | if (ret == 0)
|
---|
| 605 | ret = wc_Sha256Update(sha, drbg->V, sizeof(drbg->V));
|
---|
| 606 | if (ret == 0)
|
---|
| 607 | ret = wc_Sha256Final(sha, digest);
|
---|
| 608 |
|
---|
| 609 | #ifndef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 610 | wc_Sha256Free(sha);
|
---|
| 611 | #endif
|
---|
| 612 |
|
---|
| 613 | if (ret == 0) {
|
---|
| 614 | array_add(drbg->V, sizeof(drbg->V), digest, WC_SHA256_DIGEST_SIZE);
|
---|
| 615 | array_add(drbg->V, sizeof(drbg->V), drbg->C, sizeof(drbg->C));
|
---|
| 616 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
| 617 | reseedCtr = ByteReverseWord32(reseedCtr);
|
---|
| 618 | #endif
|
---|
| 619 | array_add(drbg->V, sizeof(drbg->V),
|
---|
| 620 | (byte*)&reseedCtr, sizeof(reseedCtr));
|
---|
| 621 | ret = DRBG_SUCCESS;
|
---|
| 622 | }
|
---|
| 623 | drbg->reseedCtr++;
|
---|
| 624 | }
|
---|
| 625 | ForceZero(digest, WC_SHA256_DIGEST_SIZE);
|
---|
| 626 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
| 627 | FREE_VAR(digest, drbg->heap);
|
---|
| 628 | #endif
|
---|
| 629 | }
|
---|
| 630 |
|
---|
| 631 | return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
| 632 | }
|
---|
| 633 |
|
---|
| 634 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
[464] | 635 | static int Hash_DRBG_Instantiate(DRBG_internal* drbg, const byte* seed, word32 seedSz,
|
---|
[457] | 636 | const byte* nonce, word32 nonceSz,
|
---|
| 637 | void* heap, int devId)
|
---|
| 638 | {
|
---|
[464] | 639 | int ret = DRBG_FAILURE;
|
---|
[457] | 640 |
|
---|
[464] | 641 | XMEMSET(drbg, 0, sizeof(DRBG_internal));
|
---|
[457] | 642 | #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
|
---|
| 643 | drbg->heap = heap;
|
---|
| 644 | drbg->devId = devId;
|
---|
| 645 | #else
|
---|
| 646 | (void)heap;
|
---|
| 647 | (void)devId;
|
---|
| 648 | #endif
|
---|
| 649 |
|
---|
| 650 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 651 | #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
|
---|
| 652 | ret = wc_InitSha256_ex(&drbg->sha256, drbg->heap, drbg->devId);
|
---|
| 653 | #else
|
---|
| 654 | ret = wc_InitSha256(&drbg->sha256);
|
---|
| 655 | #endif
|
---|
| 656 | if (ret != 0)
|
---|
| 657 | return ret;
|
---|
| 658 | #endif
|
---|
| 659 |
|
---|
| 660 | if (Hash_df(drbg, drbg->V, sizeof(drbg->V), drbgInitV, seed, seedSz,
|
---|
| 661 | nonce, nonceSz) == DRBG_SUCCESS &&
|
---|
| 662 | Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V,
|
---|
| 663 | sizeof(drbg->V), NULL, 0) == DRBG_SUCCESS) {
|
---|
| 664 |
|
---|
| 665 | drbg->reseedCtr = 1;
|
---|
| 666 | drbg->lastBlock = 0;
|
---|
| 667 | drbg->matchCount = 0;
|
---|
| 668 | ret = DRBG_SUCCESS;
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 | return ret;
|
---|
| 672 | }
|
---|
| 673 |
|
---|
| 674 | /* Returns: DRBG_SUCCESS or DRBG_FAILURE */
|
---|
[464] | 675 | static int Hash_DRBG_Uninstantiate(DRBG_internal* drbg)
|
---|
[457] | 676 | {
|
---|
| 677 | word32 i;
|
---|
| 678 | int compareSum = 0;
|
---|
| 679 | byte* compareDrbg = (byte*)drbg;
|
---|
| 680 |
|
---|
| 681 | #ifdef WOLFSSL_SMALL_STACK_CACHE
|
---|
| 682 | wc_Sha256Free(&drbg->sha256);
|
---|
| 683 | #endif
|
---|
| 684 |
|
---|
[464] | 685 | ForceZero(drbg, sizeof(DRBG_internal));
|
---|
[457] | 686 |
|
---|
[464] | 687 | for (i = 0; i < sizeof(DRBG_internal); i++)
|
---|
[457] | 688 | compareSum |= compareDrbg[i] ^ 0;
|
---|
| 689 |
|
---|
| 690 | return (compareSum == 0) ? DRBG_SUCCESS : DRBG_FAILURE;
|
---|
| 691 | }
|
---|
| 692 |
|
---|
| 693 |
|
---|
| 694 | int wc_RNG_TestSeed(const byte* seed, word32 seedSz)
|
---|
| 695 | {
|
---|
[464] | 696 | int ret = 0;
|
---|
[457] | 697 |
|
---|
| 698 | /* Check the seed for duplicate words. */
|
---|
| 699 | word32 seedIdx = 0;
|
---|
| 700 | word32 scratchSz = min(SEED_BLOCK_SZ, seedSz - SEED_BLOCK_SZ);
|
---|
| 701 |
|
---|
| 702 | while (seedIdx < seedSz - SEED_BLOCK_SZ) {
|
---|
| 703 | if (ConstantCompare(seed + seedIdx,
|
---|
| 704 | seed + seedIdx + scratchSz,
|
---|
| 705 | scratchSz) == 0) {
|
---|
| 706 |
|
---|
| 707 | ret = DRBG_CONT_FAILURE;
|
---|
| 708 | }
|
---|
| 709 | seedIdx += SEED_BLOCK_SZ;
|
---|
| 710 | scratchSz = min(SEED_BLOCK_SZ, (seedSz - seedIdx));
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 | return ret;
|
---|
| 714 | }
|
---|
| 715 | #endif /* HAVE_HASHDRBG */
|
---|
| 716 | /* End NIST DRBG Code */
|
---|
| 717 |
|
---|
| 718 |
|
---|
| 719 | static int _InitRng(WC_RNG* rng, byte* nonce, word32 nonceSz,
|
---|
| 720 | void* heap, int devId)
|
---|
| 721 | {
|
---|
[464] | 722 | int ret = 0;
|
---|
[457] | 723 | #ifdef HAVE_HASHDRBG
|
---|
| 724 | word32 seedSz = SEED_SZ + SEED_BLOCK_SZ;
|
---|
| 725 | #endif
|
---|
| 726 |
|
---|
| 727 | (void)nonce;
|
---|
| 728 | (void)nonceSz;
|
---|
| 729 |
|
---|
| 730 | if (rng == NULL)
|
---|
| 731 | return BAD_FUNC_ARG;
|
---|
| 732 | if (nonce == NULL && nonceSz != 0)
|
---|
| 733 | return BAD_FUNC_ARG;
|
---|
| 734 |
|
---|
| 735 | #ifdef WOLFSSL_HEAP_TEST
|
---|
| 736 | rng->heap = (void*)WOLFSSL_HEAP_TEST;
|
---|
| 737 | (void)heap;
|
---|
| 738 | #else
|
---|
| 739 | rng->heap = heap;
|
---|
| 740 | #endif
|
---|
| 741 | #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
|
---|
| 742 | rng->devId = devId;
|
---|
| 743 | #if defined(WOLF_CRYPTO_CB)
|
---|
| 744 | rng->seed.devId = devId;
|
---|
| 745 | #endif
|
---|
| 746 | #else
|
---|
| 747 | (void)devId;
|
---|
| 748 | #endif
|
---|
| 749 |
|
---|
| 750 | #ifdef HAVE_HASHDRBG
|
---|
| 751 | /* init the DBRG to known values */
|
---|
| 752 | rng->drbg = NULL;
|
---|
| 753 | rng->status = DRBG_NOT_INIT;
|
---|
| 754 | #endif
|
---|
| 755 |
|
---|
| 756 | #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
|
---|
| 757 | /* init the intel RD seed and/or rand */
|
---|
| 758 | wc_InitRng_IntelRD();
|
---|
| 759 | #endif
|
---|
| 760 |
|
---|
| 761 | /* configure async RNG source if available */
|
---|
| 762 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
| 763 | ret = wolfAsync_DevCtxInit(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG,
|
---|
| 764 | rng->heap, rng->devId);
|
---|
| 765 | if (ret != 0)
|
---|
| 766 | return ret;
|
---|
| 767 | #endif
|
---|
| 768 |
|
---|
| 769 | #ifdef HAVE_INTEL_RDRAND
|
---|
| 770 | /* if CPU supports RDRAND, use it directly and by-pass DRBG init */
|
---|
| 771 | if (IS_INTEL_RDRAND(intel_flags))
|
---|
| 772 | return 0;
|
---|
| 773 | #endif
|
---|
| 774 |
|
---|
| 775 | #ifdef CUSTOM_RAND_GENERATE_BLOCK
|
---|
| 776 | ret = 0; /* success */
|
---|
| 777 | #else
|
---|
| 778 | #ifdef HAVE_HASHDRBG
|
---|
| 779 | if (nonceSz == 0)
|
---|
| 780 | seedSz = MAX_SEED_SZ;
|
---|
| 781 |
|
---|
| 782 | if (wc_RNG_HealthTestLocal(0) == 0) {
|
---|
| 783 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
| 784 | DECLARE_VAR(seed, byte, MAX_SEED_SZ, rng->heap);
|
---|
| 785 | if (seed == NULL)
|
---|
| 786 | return MEMORY_E;
|
---|
| 787 | #else
|
---|
| 788 | byte seed[MAX_SEED_SZ];
|
---|
| 789 | #endif
|
---|
| 790 |
|
---|
| 791 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 792 | rng->drbg =
|
---|
[464] | 793 | (struct DRBG*)XMALLOC(sizeof(DRBG_internal), rng->heap,
|
---|
[457] | 794 | DYNAMIC_TYPE_RNG);
|
---|
| 795 | if (rng->drbg == NULL) {
|
---|
| 796 | ret = MEMORY_E;
|
---|
[464] | 797 | rng->status = DRBG_FAILED;
|
---|
[457] | 798 | }
|
---|
[464] | 799 | #else
|
---|
| 800 | rng->drbg = (struct DRBG*)&rng->drbg_data;
|
---|
| 801 | #endif
|
---|
| 802 | if (ret == 0) {
|
---|
[457] | 803 | ret = wc_GenerateSeed(&rng->seed, seed, seedSz);
|
---|
[464] | 804 | if (ret == 0)
|
---|
| 805 | ret = wc_RNG_TestSeed(seed, seedSz);
|
---|
| 806 | else {
|
---|
[457] | 807 | ret = DRBG_FAILURE;
|
---|
[464] | 808 | rng->status = DRBG_FAILED;
|
---|
| 809 | }
|
---|
[457] | 810 |
|
---|
| 811 | if (ret == DRBG_SUCCESS)
|
---|
[464] | 812 | ret = Hash_DRBG_Instantiate((DRBG_internal *)rng->drbg,
|
---|
[457] | 813 | seed + SEED_BLOCK_SZ, seedSz - SEED_BLOCK_SZ,
|
---|
| 814 | nonce, nonceSz, rng->heap, devId);
|
---|
| 815 |
|
---|
| 816 | if (ret != DRBG_SUCCESS) {
|
---|
| 817 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 818 | XFREE(rng->drbg, rng->heap, DYNAMIC_TYPE_RNG);
|
---|
| 819 | #endif
|
---|
| 820 | rng->drbg = NULL;
|
---|
| 821 | }
|
---|
| 822 | }
|
---|
| 823 |
|
---|
| 824 | ForceZero(seed, seedSz);
|
---|
| 825 | #ifdef WC_ASYNC_ENABLE_SHA256
|
---|
| 826 | FREE_VAR(seed, rng->heap);
|
---|
| 827 | #endif
|
---|
| 828 | }
|
---|
| 829 | else
|
---|
| 830 | ret = DRBG_CONT_FAILURE;
|
---|
| 831 |
|
---|
| 832 | if (ret == DRBG_SUCCESS) {
|
---|
| 833 | rng->status = DRBG_OK;
|
---|
| 834 | ret = 0;
|
---|
| 835 | }
|
---|
| 836 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
| 837 | rng->status = DRBG_CONT_FAILED;
|
---|
| 838 | ret = DRBG_CONT_FIPS_E;
|
---|
| 839 | }
|
---|
| 840 | else if (ret == DRBG_FAILURE) {
|
---|
| 841 | rng->status = DRBG_FAILED;
|
---|
| 842 | ret = RNG_FAILURE_E;
|
---|
| 843 | }
|
---|
| 844 | else {
|
---|
| 845 | rng->status = DRBG_FAILED;
|
---|
| 846 | }
|
---|
| 847 | #endif /* HAVE_HASHDRBG */
|
---|
| 848 | #endif /* CUSTOM_RAND_GENERATE_BLOCK */
|
---|
| 849 |
|
---|
| 850 | return ret;
|
---|
| 851 | }
|
---|
| 852 |
|
---|
| 853 |
|
---|
| 854 | WOLFSSL_ABI
|
---|
| 855 | WC_RNG* wc_rng_new(byte* nonce, word32 nonceSz, void* heap)
|
---|
| 856 | {
|
---|
| 857 | WC_RNG* rng;
|
---|
| 858 |
|
---|
| 859 | rng = (WC_RNG*)XMALLOC(sizeof(WC_RNG), heap, DYNAMIC_TYPE_RNG);
|
---|
| 860 | if (rng) {
|
---|
| 861 | int error = _InitRng(rng, nonce, nonceSz, heap, INVALID_DEVID) != 0;
|
---|
| 862 | if (error) {
|
---|
| 863 | XFREE(rng, heap, DYNAMIC_TYPE_RNG);
|
---|
| 864 | rng = NULL;
|
---|
| 865 | }
|
---|
| 866 | }
|
---|
| 867 |
|
---|
| 868 | return rng;
|
---|
| 869 | }
|
---|
| 870 |
|
---|
| 871 |
|
---|
| 872 | WOLFSSL_ABI
|
---|
| 873 | void wc_rng_free(WC_RNG* rng)
|
---|
| 874 | {
|
---|
| 875 | if (rng) {
|
---|
| 876 | void* heap = rng->heap;
|
---|
| 877 |
|
---|
| 878 | wc_FreeRng(rng);
|
---|
| 879 | ForceZero(rng, sizeof(WC_RNG));
|
---|
| 880 | XFREE(rng, heap, DYNAMIC_TYPE_RNG);
|
---|
| 881 | (void)heap;
|
---|
| 882 | }
|
---|
| 883 | }
|
---|
| 884 |
|
---|
| 885 |
|
---|
| 886 | int wc_InitRng(WC_RNG* rng)
|
---|
| 887 | {
|
---|
| 888 | return _InitRng(rng, NULL, 0, NULL, INVALID_DEVID);
|
---|
| 889 | }
|
---|
| 890 |
|
---|
| 891 |
|
---|
| 892 | int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId)
|
---|
| 893 | {
|
---|
| 894 | return _InitRng(rng, NULL, 0, heap, devId);
|
---|
| 895 | }
|
---|
| 896 |
|
---|
| 897 |
|
---|
| 898 | int wc_InitRngNonce(WC_RNG* rng, byte* nonce, word32 nonceSz)
|
---|
| 899 | {
|
---|
| 900 | return _InitRng(rng, nonce, nonceSz, NULL, INVALID_DEVID);
|
---|
| 901 | }
|
---|
| 902 |
|
---|
| 903 |
|
---|
| 904 | int wc_InitRngNonce_ex(WC_RNG* rng, byte* nonce, word32 nonceSz,
|
---|
| 905 | void* heap, int devId)
|
---|
| 906 | {
|
---|
| 907 | return _InitRng(rng, nonce, nonceSz, heap, devId);
|
---|
| 908 | }
|
---|
| 909 |
|
---|
| 910 |
|
---|
| 911 | /* place a generated block in output */
|
---|
| 912 | WOLFSSL_ABI
|
---|
| 913 | int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
|
---|
| 914 | {
|
---|
| 915 | int ret;
|
---|
| 916 |
|
---|
| 917 | if (rng == NULL || output == NULL)
|
---|
| 918 | return BAD_FUNC_ARG;
|
---|
| 919 |
|
---|
[464] | 920 | if (sz == 0)
|
---|
| 921 | return 0;
|
---|
| 922 |
|
---|
[457] | 923 | #ifdef WOLF_CRYPTO_CB
|
---|
| 924 | if (rng->devId != INVALID_DEVID) {
|
---|
| 925 | ret = wc_CryptoCb_RandomBlock(rng, output, sz);
|
---|
| 926 | if (ret != CRYPTOCB_UNAVAILABLE)
|
---|
| 927 | return ret;
|
---|
| 928 | /* fall-through when unavailable */
|
---|
| 929 | }
|
---|
| 930 | #endif
|
---|
| 931 |
|
---|
| 932 | #ifdef HAVE_INTEL_RDRAND
|
---|
| 933 | if (IS_INTEL_RDRAND(intel_flags))
|
---|
| 934 | return wc_GenerateRand_IntelRD(NULL, output, sz);
|
---|
| 935 | #endif
|
---|
| 936 |
|
---|
[464] | 937 | #if defined(WOLFSSL_SILABS_SE_ACCEL) && defined(WOLFSSL_SILABS_TRNG)
|
---|
| 938 | return silabs_GenerateRand(output, sz);
|
---|
| 939 | #endif
|
---|
| 940 |
|
---|
[457] | 941 | #if defined(WOLFSSL_ASYNC_CRYPT)
|
---|
| 942 | if (rng->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RNG) {
|
---|
| 943 | /* these are blocking */
|
---|
| 944 | #ifdef HAVE_CAVIUM
|
---|
| 945 | return NitroxRngGenerateBlock(rng, output, sz);
|
---|
| 946 | #elif defined(HAVE_INTEL_QA) && defined(QAT_ENABLE_RNG)
|
---|
| 947 | return IntelQaDrbg(&rng->asyncDev, output, sz);
|
---|
| 948 | #else
|
---|
| 949 | /* simulator not supported */
|
---|
| 950 | #endif
|
---|
| 951 | }
|
---|
| 952 | #endif
|
---|
| 953 |
|
---|
| 954 | #ifdef CUSTOM_RAND_GENERATE_BLOCK
|
---|
| 955 | XMEMSET(output, 0, sz);
|
---|
| 956 | ret = CUSTOM_RAND_GENERATE_BLOCK(output, sz);
|
---|
| 957 | #else
|
---|
| 958 |
|
---|
| 959 | #ifdef HAVE_HASHDRBG
|
---|
| 960 | if (sz > RNG_MAX_BLOCK_LEN)
|
---|
| 961 | return BAD_FUNC_ARG;
|
---|
| 962 |
|
---|
| 963 | if (rng->status != DRBG_OK)
|
---|
| 964 | return RNG_FAILURE_E;
|
---|
| 965 |
|
---|
[464] | 966 | ret = Hash_DRBG_Generate((DRBG_internal *)rng->drbg, output, sz);
|
---|
[457] | 967 | if (ret == DRBG_NEED_RESEED) {
|
---|
| 968 | if (wc_RNG_HealthTestLocal(1) == 0) {
|
---|
| 969 | byte newSeed[SEED_SZ + SEED_BLOCK_SZ];
|
---|
| 970 |
|
---|
| 971 | ret = wc_GenerateSeed(&rng->seed, newSeed,
|
---|
| 972 | SEED_SZ + SEED_BLOCK_SZ);
|
---|
| 973 | if (ret != 0)
|
---|
| 974 | ret = DRBG_FAILURE;
|
---|
| 975 | else
|
---|
| 976 | ret = wc_RNG_TestSeed(newSeed, SEED_SZ + SEED_BLOCK_SZ);
|
---|
| 977 |
|
---|
| 978 | if (ret == DRBG_SUCCESS)
|
---|
[464] | 979 | ret = Hash_DRBG_Reseed((DRBG_internal *)rng->drbg, newSeed + SEED_BLOCK_SZ,
|
---|
[457] | 980 | SEED_SZ);
|
---|
| 981 | if (ret == DRBG_SUCCESS)
|
---|
[464] | 982 | ret = Hash_DRBG_Generate((DRBG_internal *)rng->drbg, output, sz);
|
---|
[457] | 983 |
|
---|
| 984 | ForceZero(newSeed, sizeof(newSeed));
|
---|
| 985 | }
|
---|
| 986 | else
|
---|
| 987 | ret = DRBG_CONT_FAILURE;
|
---|
| 988 | }
|
---|
| 989 |
|
---|
| 990 | if (ret == DRBG_SUCCESS) {
|
---|
| 991 | ret = 0;
|
---|
| 992 | }
|
---|
| 993 | else if (ret == DRBG_CONT_FAILURE) {
|
---|
| 994 | ret = DRBG_CONT_FIPS_E;
|
---|
| 995 | rng->status = DRBG_CONT_FAILED;
|
---|
| 996 | }
|
---|
| 997 | else {
|
---|
| 998 | ret = RNG_FAILURE_E;
|
---|
| 999 | rng->status = DRBG_FAILED;
|
---|
| 1000 | }
|
---|
| 1001 | #else
|
---|
| 1002 |
|
---|
| 1003 | /* if we get here then there is an RNG configuration error */
|
---|
| 1004 | ret = RNG_FAILURE_E;
|
---|
| 1005 |
|
---|
| 1006 | #endif /* HAVE_HASHDRBG */
|
---|
| 1007 | #endif /* CUSTOM_RAND_GENERATE_BLOCK */
|
---|
| 1008 |
|
---|
| 1009 | return ret;
|
---|
| 1010 | }
|
---|
| 1011 |
|
---|
| 1012 |
|
---|
| 1013 | int wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
|
---|
| 1014 | {
|
---|
| 1015 | return wc_RNG_GenerateBlock(rng, b, 1);
|
---|
| 1016 | }
|
---|
| 1017 |
|
---|
| 1018 |
|
---|
| 1019 | int wc_FreeRng(WC_RNG* rng)
|
---|
| 1020 | {
|
---|
| 1021 | int ret = 0;
|
---|
| 1022 |
|
---|
| 1023 | if (rng == NULL)
|
---|
| 1024 | return BAD_FUNC_ARG;
|
---|
| 1025 |
|
---|
| 1026 | #if defined(WOLFSSL_ASYNC_CRYPT)
|
---|
| 1027 | wolfAsync_DevCtxFree(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG);
|
---|
| 1028 | #endif
|
---|
| 1029 |
|
---|
| 1030 | #ifdef HAVE_HASHDRBG
|
---|
| 1031 | if (rng->drbg != NULL) {
|
---|
[464] | 1032 | if (Hash_DRBG_Uninstantiate((DRBG_internal *)rng->drbg) != DRBG_SUCCESS)
|
---|
[457] | 1033 | ret = RNG_FAILURE_E;
|
---|
| 1034 |
|
---|
| 1035 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 1036 | XFREE(rng->drbg, rng->heap, DYNAMIC_TYPE_RNG);
|
---|
| 1037 | #endif
|
---|
| 1038 | rng->drbg = NULL;
|
---|
| 1039 | }
|
---|
| 1040 |
|
---|
| 1041 | rng->status = DRBG_NOT_INIT;
|
---|
| 1042 | #endif /* HAVE_HASHDRBG */
|
---|
| 1043 |
|
---|
| 1044 | return ret;
|
---|
| 1045 | }
|
---|
| 1046 |
|
---|
| 1047 | #ifdef HAVE_HASHDRBG
|
---|
| 1048 | int wc_RNG_HealthTest(int reseed, const byte* seedA, word32 seedASz,
|
---|
| 1049 | const byte* seedB, word32 seedBSz,
|
---|
| 1050 | byte* output, word32 outputSz)
|
---|
| 1051 | {
|
---|
| 1052 | return wc_RNG_HealthTest_ex(reseed, NULL, 0,
|
---|
| 1053 | seedA, seedASz, seedB, seedBSz,
|
---|
| 1054 | output, outputSz,
|
---|
| 1055 | NULL, INVALID_DEVID);
|
---|
| 1056 | }
|
---|
| 1057 |
|
---|
| 1058 |
|
---|
| 1059 | int wc_RNG_HealthTest_ex(int reseed, const byte* nonce, word32 nonceSz,
|
---|
| 1060 | const byte* seedA, word32 seedASz,
|
---|
| 1061 | const byte* seedB, word32 seedBSz,
|
---|
| 1062 | byte* output, word32 outputSz,
|
---|
| 1063 | void* heap, int devId)
|
---|
| 1064 | {
|
---|
| 1065 | int ret = -1;
|
---|
[464] | 1066 | DRBG_internal* drbg;
|
---|
[457] | 1067 | #ifndef WOLFSSL_SMALL_STACK
|
---|
[464] | 1068 | DRBG_internal drbg_var;
|
---|
[457] | 1069 | #endif
|
---|
| 1070 |
|
---|
| 1071 | if (seedA == NULL || output == NULL) {
|
---|
| 1072 | return BAD_FUNC_ARG;
|
---|
| 1073 | }
|
---|
| 1074 |
|
---|
| 1075 | if (reseed != 0 && seedB == NULL) {
|
---|
| 1076 | return BAD_FUNC_ARG;
|
---|
| 1077 | }
|
---|
| 1078 |
|
---|
| 1079 | if (outputSz != RNG_HEALTH_TEST_CHECK_SIZE) {
|
---|
| 1080 | return ret;
|
---|
| 1081 | }
|
---|
| 1082 |
|
---|
| 1083 | #ifdef WOLFSSL_SMALL_STACK
|
---|
[464] | 1084 | drbg = (DRBG_internal*)XMALLOC(sizeof(DRBG_internal), NULL, DYNAMIC_TYPE_RNG);
|
---|
[457] | 1085 | if (drbg == NULL) {
|
---|
| 1086 | return MEMORY_E;
|
---|
| 1087 | }
|
---|
| 1088 | #else
|
---|
| 1089 | drbg = &drbg_var;
|
---|
| 1090 | #endif
|
---|
| 1091 |
|
---|
| 1092 | if (Hash_DRBG_Instantiate(drbg, seedA, seedASz, nonce, nonceSz,
|
---|
| 1093 | heap, devId) != 0) {
|
---|
| 1094 | goto exit_rng_ht;
|
---|
| 1095 | }
|
---|
| 1096 |
|
---|
| 1097 | if (reseed) {
|
---|
| 1098 | if (Hash_DRBG_Reseed(drbg, seedB, seedBSz) != 0) {
|
---|
| 1099 | goto exit_rng_ht;
|
---|
| 1100 | }
|
---|
| 1101 | }
|
---|
| 1102 |
|
---|
| 1103 | /* This call to generate is prescribed by the NIST DRBGVS
|
---|
| 1104 | * procedure. The results are thrown away. The known
|
---|
| 1105 | * answer test checks the second block of DRBG out of
|
---|
| 1106 | * the generator to ensure the internal state is updated
|
---|
| 1107 | * as expected. */
|
---|
| 1108 | if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) {
|
---|
| 1109 | goto exit_rng_ht;
|
---|
| 1110 | }
|
---|
| 1111 |
|
---|
| 1112 | if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) {
|
---|
| 1113 | goto exit_rng_ht;
|
---|
| 1114 | }
|
---|
| 1115 |
|
---|
| 1116 | /* Mark success */
|
---|
| 1117 | ret = 0;
|
---|
| 1118 |
|
---|
| 1119 | exit_rng_ht:
|
---|
| 1120 |
|
---|
| 1121 | /* This is safe to call even if Hash_DRBG_Instantiate fails */
|
---|
| 1122 | if (Hash_DRBG_Uninstantiate(drbg) != 0) {
|
---|
| 1123 | ret = -1;
|
---|
| 1124 | }
|
---|
| 1125 |
|
---|
| 1126 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1127 | XFREE(drbg, NULL, DYNAMIC_TYPE_RNG);
|
---|
| 1128 | #endif
|
---|
| 1129 |
|
---|
| 1130 | return ret;
|
---|
| 1131 | }
|
---|
| 1132 |
|
---|
| 1133 |
|
---|
[464] | 1134 | const FLASH_QUALIFIER byte seedA_data[] = {
|
---|
[457] | 1135 | 0x63, 0x36, 0x33, 0x77, 0xe4, 0x1e, 0x86, 0x46, 0x8d, 0xeb, 0x0a, 0xb4,
|
---|
| 1136 | 0xa8, 0xed, 0x68, 0x3f, 0x6a, 0x13, 0x4e, 0x47, 0xe0, 0x14, 0xc7, 0x00,
|
---|
| 1137 | 0x45, 0x4e, 0x81, 0xe9, 0x53, 0x58, 0xa5, 0x69, 0x80, 0x8a, 0xa3, 0x8f,
|
---|
| 1138 | 0x2a, 0x72, 0xa6, 0x23, 0x59, 0x91, 0x5a, 0x9f, 0x8a, 0x04, 0xca, 0x68
|
---|
| 1139 | };
|
---|
| 1140 |
|
---|
[464] | 1141 | const FLASH_QUALIFIER byte reseedSeedA_data[] = {
|
---|
[457] | 1142 | 0xe6, 0x2b, 0x8a, 0x8e, 0xe8, 0xf1, 0x41, 0xb6, 0x98, 0x05, 0x66, 0xe3,
|
---|
| 1143 | 0xbf, 0xe3, 0xc0, 0x49, 0x03, 0xda, 0xd4, 0xac, 0x2c, 0xdf, 0x9f, 0x22,
|
---|
| 1144 | 0x80, 0x01, 0x0a, 0x67, 0x39, 0xbc, 0x83, 0xd3
|
---|
| 1145 | };
|
---|
| 1146 |
|
---|
[464] | 1147 | const FLASH_QUALIFIER byte outputA_data[] = {
|
---|
[457] | 1148 | 0x04, 0xee, 0xc6, 0x3b, 0xb2, 0x31, 0xdf, 0x2c, 0x63, 0x0a, 0x1a, 0xfb,
|
---|
| 1149 | 0xe7, 0x24, 0x94, 0x9d, 0x00, 0x5a, 0x58, 0x78, 0x51, 0xe1, 0xaa, 0x79,
|
---|
| 1150 | 0x5e, 0x47, 0x73, 0x47, 0xc8, 0xb0, 0x56, 0x62, 0x1c, 0x18, 0xbd, 0xdc,
|
---|
| 1151 | 0xdd, 0x8d, 0x99, 0xfc, 0x5f, 0xc2, 0xb9, 0x20, 0x53, 0xd8, 0xcf, 0xac,
|
---|
| 1152 | 0xfb, 0x0b, 0xb8, 0x83, 0x12, 0x05, 0xfa, 0xd1, 0xdd, 0xd6, 0xc0, 0x71,
|
---|
| 1153 | 0x31, 0x8a, 0x60, 0x18, 0xf0, 0x3b, 0x73, 0xf5, 0xed, 0xe4, 0xd4, 0xd0,
|
---|
| 1154 | 0x71, 0xf9, 0xde, 0x03, 0xfd, 0x7a, 0xea, 0x10, 0x5d, 0x92, 0x99, 0xb8,
|
---|
| 1155 | 0xaf, 0x99, 0xaa, 0x07, 0x5b, 0xdb, 0x4d, 0xb9, 0xaa, 0x28, 0xc1, 0x8d,
|
---|
| 1156 | 0x17, 0x4b, 0x56, 0xee, 0x2a, 0x01, 0x4d, 0x09, 0x88, 0x96, 0xff, 0x22,
|
---|
| 1157 | 0x82, 0xc9, 0x55, 0xa8, 0x19, 0x69, 0xe0, 0x69, 0xfa, 0x8c, 0xe0, 0x07,
|
---|
| 1158 | 0xa1, 0x80, 0x18, 0x3a, 0x07, 0xdf, 0xae, 0x17
|
---|
| 1159 | };
|
---|
| 1160 |
|
---|
[464] | 1161 | const FLASH_QUALIFIER byte seedB_data[] = {
|
---|
[457] | 1162 | 0xa6, 0x5a, 0xd0, 0xf3, 0x45, 0xdb, 0x4e, 0x0e, 0xff, 0xe8, 0x75, 0xc3,
|
---|
| 1163 | 0xa2, 0xe7, 0x1f, 0x42, 0xc7, 0x12, 0x9d, 0x62, 0x0f, 0xf5, 0xc1, 0x19,
|
---|
| 1164 | 0xa9, 0xef, 0x55, 0xf0, 0x51, 0x85, 0xe0, 0xfb, /* nonce next */
|
---|
| 1165 | 0x85, 0x81, 0xf9, 0x31, 0x75, 0x17, 0x27, 0x6e, 0x06, 0xe9, 0x60, 0x7d,
|
---|
| 1166 | 0xdb, 0xcb, 0xcc, 0x2e
|
---|
| 1167 | };
|
---|
| 1168 |
|
---|
[464] | 1169 | const FLASH_QUALIFIER byte outputB_data[] = {
|
---|
[457] | 1170 | 0xd3, 0xe1, 0x60, 0xc3, 0x5b, 0x99, 0xf3, 0x40, 0xb2, 0x62, 0x82, 0x64,
|
---|
| 1171 | 0xd1, 0x75, 0x10, 0x60, 0xe0, 0x04, 0x5d, 0xa3, 0x83, 0xff, 0x57, 0xa5,
|
---|
| 1172 | 0x7d, 0x73, 0xa6, 0x73, 0xd2, 0xb8, 0xd8, 0x0d, 0xaa, 0xf6, 0xa6, 0xc3,
|
---|
| 1173 | 0x5a, 0x91, 0xbb, 0x45, 0x79, 0xd7, 0x3f, 0xd0, 0xc8, 0xfe, 0xd1, 0x11,
|
---|
| 1174 | 0xb0, 0x39, 0x13, 0x06, 0x82, 0x8a, 0xdf, 0xed, 0x52, 0x8f, 0x01, 0x81,
|
---|
| 1175 | 0x21, 0xb3, 0xfe, 0xbd, 0xc3, 0x43, 0xe7, 0x97, 0xb8, 0x7d, 0xbb, 0x63,
|
---|
| 1176 | 0xdb, 0x13, 0x33, 0xde, 0xd9, 0xd1, 0xec, 0xe1, 0x77, 0xcf, 0xa6, 0xb7,
|
---|
| 1177 | 0x1f, 0xe8, 0xab, 0x1d, 0xa4, 0x66, 0x24, 0xed, 0x64, 0x15, 0xe5, 0x1c,
|
---|
| 1178 | 0xcd, 0xe2, 0xc7, 0xca, 0x86, 0xe2, 0x83, 0x99, 0x0e, 0xea, 0xeb, 0x91,
|
---|
| 1179 | 0x12, 0x04, 0x15, 0x52, 0x8b, 0x22, 0x95, 0x91, 0x02, 0x81, 0xb0, 0x2d,
|
---|
| 1180 | 0xd4, 0x31, 0xf4, 0xc9, 0xf7, 0x04, 0x27, 0xdf
|
---|
| 1181 | };
|
---|
| 1182 |
|
---|
| 1183 |
|
---|
| 1184 | static int wc_RNG_HealthTestLocal(int reseed)
|
---|
| 1185 | {
|
---|
| 1186 | int ret = 0;
|
---|
| 1187 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1188 | byte* check;
|
---|
| 1189 | #else
|
---|
| 1190 | byte check[RNG_HEALTH_TEST_CHECK_SIZE];
|
---|
| 1191 | #endif
|
---|
| 1192 |
|
---|
| 1193 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1194 | check = (byte*)XMALLOC(RNG_HEALTH_TEST_CHECK_SIZE, NULL,
|
---|
| 1195 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1196 | if (check == NULL) {
|
---|
| 1197 | return MEMORY_E;
|
---|
| 1198 | }
|
---|
| 1199 | #endif
|
---|
| 1200 |
|
---|
| 1201 | if (reseed) {
|
---|
[464] | 1202 | #ifdef WOLFSSL_USE_FLASHMEM
|
---|
| 1203 | byte* seedA = (byte*)XMALLOC(sizeof(seedA_data), NULL,
|
---|
| 1204 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1205 | byte* reseedSeedA = (byte*)XMALLOC(sizeof(reseedSeedA_data), NULL,
|
---|
| 1206 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1207 | byte* outputA = (byte*)XMALLOC(sizeof(outputA_data), NULL,
|
---|
| 1208 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1209 |
|
---|
| 1210 | if (!seedA || !reseedSeedA || !outputA) {
|
---|
| 1211 | XFREE(seedA, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1212 | XFREE(reseedSeedA, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1213 | XFREE(outputA, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1214 | ret = MEMORY_E;
|
---|
| 1215 | }
|
---|
| 1216 | else {
|
---|
| 1217 | XMEMCPY_P(seedA, seedA_data, sizeof(seedA_data));
|
---|
| 1218 | XMEMCPY_P(reseedSeedA, reseedSeedA_data, sizeof(reseedSeedA_data));
|
---|
| 1219 | XMEMCPY_P(outputA, outputA_data, sizeof(outputA_data));
|
---|
| 1220 | #else
|
---|
| 1221 | const byte* seedA = seedA_data;
|
---|
| 1222 | const byte* reseedSeedA = reseedSeedA_data;
|
---|
| 1223 | const byte* outputA = outputA_data;
|
---|
| 1224 | #endif
|
---|
| 1225 | ret = wc_RNG_HealthTest(1, seedA, sizeof(seedA_data),
|
---|
| 1226 | reseedSeedA, sizeof(reseedSeedA_data),
|
---|
[457] | 1227 | check, RNG_HEALTH_TEST_CHECK_SIZE);
|
---|
| 1228 | if (ret == 0) {
|
---|
| 1229 | if (ConstantCompare(check, outputA,
|
---|
| 1230 | RNG_HEALTH_TEST_CHECK_SIZE) != 0)
|
---|
| 1231 | ret = -1;
|
---|
| 1232 | }
|
---|
[464] | 1233 |
|
---|
| 1234 | #ifdef WOLFSSL_USE_FLASHMEM
|
---|
| 1235 | XFREE(seedA, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1236 | XFREE(reseedSeedA, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1237 | XFREE(outputA, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1238 | }
|
---|
| 1239 | #endif
|
---|
[457] | 1240 | }
|
---|
| 1241 | else {
|
---|
[464] | 1242 | #ifdef WOLFSSL_USE_FLASHMEM
|
---|
| 1243 | byte* seedB = (byte*)XMALLOC(sizeof(seedB_data), NULL,
|
---|
| 1244 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1245 | byte* outputB = (byte*)XMALLOC(sizeof(outputB_data), NULL,
|
---|
| 1246 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1247 |
|
---|
| 1248 | if (!seedB || !outputB) {
|
---|
| 1249 | XFREE(seedB, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1250 | XFREE(outputB, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1251 | ret = MEMORY_E;
|
---|
| 1252 | }
|
---|
| 1253 | else {
|
---|
| 1254 | XMEMCPY_P(seedB, seedB_data, sizeof(seedB_data));
|
---|
| 1255 | XMEMCPY_P(outputB, outputB_data, sizeof(outputB_data));
|
---|
| 1256 | #else
|
---|
| 1257 | const byte* seedB = seedB_data;
|
---|
| 1258 | const byte* outputB = outputB_data;
|
---|
| 1259 | #endif
|
---|
| 1260 | ret = wc_RNG_HealthTest(0, seedB, sizeof(seedB_data),
|
---|
[457] | 1261 | NULL, 0,
|
---|
| 1262 | check, RNG_HEALTH_TEST_CHECK_SIZE);
|
---|
| 1263 | if (ret == 0) {
|
---|
| 1264 | if (ConstantCompare(check, outputB,
|
---|
| 1265 | RNG_HEALTH_TEST_CHECK_SIZE) != 0)
|
---|
| 1266 | ret = -1;
|
---|
| 1267 | }
|
---|
| 1268 |
|
---|
| 1269 | /* The previous test cases use a large seed instead of a seed and nonce.
|
---|
| 1270 | * seedB is actually from a test case with a seed and nonce, and
|
---|
| 1271 | * just concatenates them. The pivot point between seed and nonce is
|
---|
| 1272 | * byte 32, feed them into the health test separately. */
|
---|
| 1273 | if (ret == 0) {
|
---|
| 1274 | ret = wc_RNG_HealthTest_ex(0,
|
---|
[464] | 1275 | seedB + 32, sizeof(seedB_data) - 32,
|
---|
[457] | 1276 | seedB, 32,
|
---|
| 1277 | NULL, 0,
|
---|
| 1278 | check, RNG_HEALTH_TEST_CHECK_SIZE,
|
---|
| 1279 | NULL, INVALID_DEVID);
|
---|
| 1280 | if (ret == 0) {
|
---|
[464] | 1281 | if (ConstantCompare(check, outputB, sizeof(outputB_data)) != 0)
|
---|
[457] | 1282 | ret = -1;
|
---|
| 1283 | }
|
---|
| 1284 | }
|
---|
[464] | 1285 |
|
---|
| 1286 | #ifdef WOLFSSL_USE_FLASHMEM
|
---|
| 1287 | XFREE(seedB, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1288 | XFREE(outputB, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1289 | }
|
---|
| 1290 | #endif
|
---|
[457] | 1291 | }
|
---|
| 1292 |
|
---|
| 1293 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1294 | XFREE(check, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1295 | #endif
|
---|
| 1296 |
|
---|
| 1297 | return ret;
|
---|
| 1298 | }
|
---|
| 1299 |
|
---|
| 1300 | #endif /* HAVE_HASHDRBG */
|
---|
| 1301 |
|
---|
| 1302 |
|
---|
| 1303 | #ifdef HAVE_WNR
|
---|
| 1304 |
|
---|
| 1305 | /*
|
---|
| 1306 | * Init global Whitewood netRandom context
|
---|
| 1307 | * Returns 0 on success, negative on error
|
---|
| 1308 | */
|
---|
| 1309 | int wc_InitNetRandom(const char* configFile, wnr_hmac_key hmac_cb, int timeout)
|
---|
| 1310 | {
|
---|
| 1311 | if (configFile == NULL || timeout < 0)
|
---|
| 1312 | return BAD_FUNC_ARG;
|
---|
| 1313 |
|
---|
| 1314 | if (wnr_mutex_init > 0) {
|
---|
| 1315 | WOLFSSL_MSG("netRandom context already created, skipping");
|
---|
| 1316 | return 0;
|
---|
| 1317 | }
|
---|
| 1318 |
|
---|
| 1319 | if (wc_InitMutex(&wnr_mutex) != 0) {
|
---|
| 1320 | WOLFSSL_MSG("Bad Init Mutex wnr_mutex");
|
---|
| 1321 | return BAD_MUTEX_E;
|
---|
| 1322 | }
|
---|
| 1323 | wnr_mutex_init = 1;
|
---|
| 1324 |
|
---|
| 1325 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
| 1326 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex");
|
---|
| 1327 | return BAD_MUTEX_E;
|
---|
| 1328 | }
|
---|
| 1329 |
|
---|
| 1330 | /* store entropy timeout */
|
---|
| 1331 | wnr_timeout = timeout;
|
---|
| 1332 |
|
---|
| 1333 | /* create global wnr_context struct */
|
---|
| 1334 | if (wnr_create(&wnr_ctx) != WNR_ERROR_NONE) {
|
---|
| 1335 | WOLFSSL_MSG("Error creating global netRandom context");
|
---|
| 1336 | return RNG_FAILURE_E;
|
---|
| 1337 | }
|
---|
| 1338 |
|
---|
| 1339 | /* load config file */
|
---|
| 1340 | if (wnr_config_loadf(wnr_ctx, (char*)configFile) != WNR_ERROR_NONE) {
|
---|
| 1341 | WOLFSSL_MSG("Error loading config file into netRandom context");
|
---|
| 1342 | wnr_destroy(wnr_ctx);
|
---|
| 1343 | wnr_ctx = NULL;
|
---|
| 1344 | return RNG_FAILURE_E;
|
---|
| 1345 | }
|
---|
| 1346 |
|
---|
| 1347 | /* create/init polling mechanism */
|
---|
| 1348 | if (wnr_poll_create() != WNR_ERROR_NONE) {
|
---|
| 1349 | printf("ERROR: wnr_poll_create() failed\n");
|
---|
| 1350 | WOLFSSL_MSG("Error initializing netRandom polling mechanism");
|
---|
| 1351 | wnr_destroy(wnr_ctx);
|
---|
| 1352 | wnr_ctx = NULL;
|
---|
| 1353 | return RNG_FAILURE_E;
|
---|
| 1354 | }
|
---|
| 1355 |
|
---|
| 1356 | /* validate config, set HMAC callback (optional) */
|
---|
| 1357 | if (wnr_setup(wnr_ctx, hmac_cb) != WNR_ERROR_NONE) {
|
---|
| 1358 | WOLFSSL_MSG("Error setting up netRandom context");
|
---|
| 1359 | wnr_destroy(wnr_ctx);
|
---|
| 1360 | wnr_ctx = NULL;
|
---|
| 1361 | wnr_poll_destroy();
|
---|
| 1362 | return RNG_FAILURE_E;
|
---|
| 1363 | }
|
---|
| 1364 |
|
---|
| 1365 | wc_UnLockMutex(&wnr_mutex);
|
---|
| 1366 |
|
---|
| 1367 | return 0;
|
---|
| 1368 | }
|
---|
| 1369 |
|
---|
| 1370 | /*
|
---|
| 1371 | * Free global Whitewood netRandom context
|
---|
| 1372 | * Returns 0 on success, negative on error
|
---|
| 1373 | */
|
---|
| 1374 | int wc_FreeNetRandom(void)
|
---|
| 1375 | {
|
---|
| 1376 | if (wnr_mutex_init > 0) {
|
---|
| 1377 |
|
---|
| 1378 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
| 1379 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex");
|
---|
| 1380 | return BAD_MUTEX_E;
|
---|
| 1381 | }
|
---|
| 1382 |
|
---|
| 1383 | if (wnr_ctx != NULL) {
|
---|
| 1384 | wnr_destroy(wnr_ctx);
|
---|
| 1385 | wnr_ctx = NULL;
|
---|
| 1386 | }
|
---|
| 1387 | wnr_poll_destroy();
|
---|
| 1388 |
|
---|
| 1389 | wc_UnLockMutex(&wnr_mutex);
|
---|
| 1390 |
|
---|
| 1391 | wc_FreeMutex(&wnr_mutex);
|
---|
| 1392 | wnr_mutex_init = 0;
|
---|
| 1393 | }
|
---|
| 1394 |
|
---|
| 1395 | return 0;
|
---|
| 1396 | }
|
---|
| 1397 |
|
---|
| 1398 | #endif /* HAVE_WNR */
|
---|
| 1399 |
|
---|
| 1400 |
|
---|
| 1401 | #if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED)
|
---|
| 1402 |
|
---|
| 1403 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
| 1404 | /* need more retries if multiple cores */
|
---|
| 1405 | #define INTELRD_RETRY (32 * 8)
|
---|
| 1406 | #else
|
---|
| 1407 | #define INTELRD_RETRY 32
|
---|
| 1408 | #endif
|
---|
| 1409 |
|
---|
| 1410 | #ifdef HAVE_INTEL_RDSEED
|
---|
| 1411 |
|
---|
[464] | 1412 | #ifndef USE_INTEL_INTRINSICS
|
---|
[457] | 1413 |
|
---|
| 1414 | /* return 0 on success */
|
---|
| 1415 | static WC_INLINE int IntelRDseed64(word64* seed)
|
---|
| 1416 | {
|
---|
| 1417 | unsigned char ok;
|
---|
| 1418 |
|
---|
| 1419 | __asm__ volatile("rdseed %0; setc %1":"=r"(*seed), "=qm"(ok));
|
---|
| 1420 | return (ok) ? 0 : -1;
|
---|
| 1421 | }
|
---|
| 1422 |
|
---|
[464] | 1423 | #else /* USE_INTEL_INTRINSICS */
|
---|
[457] | 1424 | /* The compiler Visual Studio uses does not allow inline assembly.
|
---|
| 1425 | * It does allow for Intel intrinsic functions. */
|
---|
| 1426 |
|
---|
| 1427 | /* return 0 on success */
|
---|
[464] | 1428 | # ifdef __GNUC__
|
---|
| 1429 | __attribute__((target("rdseed")))
|
---|
| 1430 | # endif
|
---|
[457] | 1431 | static WC_INLINE int IntelRDseed64(word64* seed)
|
---|
| 1432 | {
|
---|
| 1433 | int ok;
|
---|
| 1434 |
|
---|
[464] | 1435 | ok = _rdseed64_step((unsigned long long*) seed);
|
---|
[457] | 1436 | return (ok) ? 0 : -1;
|
---|
| 1437 | }
|
---|
| 1438 |
|
---|
[464] | 1439 | #endif /* USE_INTEL_INTRINSICS */
|
---|
[457] | 1440 |
|
---|
| 1441 | /* return 0 on success */
|
---|
| 1442 | static WC_INLINE int IntelRDseed64_r(word64* rnd)
|
---|
| 1443 | {
|
---|
| 1444 | int i;
|
---|
| 1445 | for (i = 0; i < INTELRD_RETRY; i++) {
|
---|
| 1446 | if (IntelRDseed64(rnd) == 0)
|
---|
| 1447 | return 0;
|
---|
| 1448 | }
|
---|
| 1449 | return -1;
|
---|
| 1450 | }
|
---|
| 1451 |
|
---|
[464] | 1452 | #ifndef WOLFSSL_LINUXKM
|
---|
[457] | 1453 | /* return 0 on success */
|
---|
| 1454 | static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1455 | {
|
---|
| 1456 | int ret;
|
---|
| 1457 | word64 rndTmp;
|
---|
| 1458 |
|
---|
| 1459 | (void)os;
|
---|
| 1460 |
|
---|
| 1461 | if (!IS_INTEL_RDSEED(intel_flags))
|
---|
| 1462 | return -1;
|
---|
| 1463 |
|
---|
| 1464 | for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64),
|
---|
| 1465 | output += sizeof(word64)) {
|
---|
| 1466 | ret = IntelRDseed64_r((word64*)output);
|
---|
| 1467 | if (ret != 0)
|
---|
| 1468 | return ret;
|
---|
| 1469 | }
|
---|
| 1470 | if (sz == 0)
|
---|
| 1471 | return 0;
|
---|
| 1472 |
|
---|
| 1473 | /* handle unaligned remainder */
|
---|
| 1474 | ret = IntelRDseed64_r(&rndTmp);
|
---|
| 1475 | if (ret != 0)
|
---|
| 1476 | return ret;
|
---|
| 1477 |
|
---|
| 1478 | XMEMCPY(output, &rndTmp, sz);
|
---|
| 1479 | ForceZero(&rndTmp, sizeof(rndTmp));
|
---|
| 1480 |
|
---|
| 1481 | return 0;
|
---|
| 1482 | }
|
---|
[464] | 1483 | #endif
|
---|
[457] | 1484 |
|
---|
| 1485 | #endif /* HAVE_INTEL_RDSEED */
|
---|
| 1486 |
|
---|
| 1487 | #ifdef HAVE_INTEL_RDRAND
|
---|
| 1488 |
|
---|
[464] | 1489 | #ifndef USE_INTEL_INTRINSICS
|
---|
[457] | 1490 |
|
---|
| 1491 | /* return 0 on success */
|
---|
| 1492 | static WC_INLINE int IntelRDrand64(word64 *rnd)
|
---|
| 1493 | {
|
---|
| 1494 | unsigned char ok;
|
---|
| 1495 |
|
---|
| 1496 | __asm__ volatile("rdrand %0; setc %1":"=r"(*rnd), "=qm"(ok));
|
---|
| 1497 |
|
---|
| 1498 | return (ok) ? 0 : -1;
|
---|
| 1499 | }
|
---|
| 1500 |
|
---|
[464] | 1501 | #else /* USE_INTEL_INTRINSICS */
|
---|
[457] | 1502 | /* The compiler Visual Studio uses does not allow inline assembly.
|
---|
| 1503 | * It does allow for Intel intrinsic functions. */
|
---|
| 1504 |
|
---|
| 1505 | /* return 0 on success */
|
---|
[464] | 1506 | # ifdef __GNUC__
|
---|
| 1507 | __attribute__((target("rdrnd")))
|
---|
| 1508 | # endif
|
---|
[457] | 1509 | static WC_INLINE int IntelRDrand64(word64 *rnd)
|
---|
| 1510 | {
|
---|
| 1511 | int ok;
|
---|
| 1512 |
|
---|
[464] | 1513 | ok = _rdrand64_step((unsigned long long*) rnd);
|
---|
[457] | 1514 |
|
---|
| 1515 | return (ok) ? 0 : -1;
|
---|
| 1516 | }
|
---|
| 1517 |
|
---|
[464] | 1518 | #endif /* USE_INTEL_INTRINSICS */
|
---|
[457] | 1519 |
|
---|
| 1520 | /* return 0 on success */
|
---|
| 1521 | static WC_INLINE int IntelRDrand64_r(word64 *rnd)
|
---|
| 1522 | {
|
---|
| 1523 | int i;
|
---|
| 1524 | for (i = 0; i < INTELRD_RETRY; i++) {
|
---|
| 1525 | if (IntelRDrand64(rnd) == 0)
|
---|
| 1526 | return 0;
|
---|
| 1527 | }
|
---|
| 1528 | return -1;
|
---|
| 1529 | }
|
---|
| 1530 |
|
---|
| 1531 | /* return 0 on success */
|
---|
| 1532 | static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1533 | {
|
---|
| 1534 | int ret;
|
---|
| 1535 | word64 rndTmp;
|
---|
| 1536 |
|
---|
| 1537 | (void)os;
|
---|
| 1538 |
|
---|
| 1539 | if (!IS_INTEL_RDRAND(intel_flags))
|
---|
| 1540 | return -1;
|
---|
| 1541 |
|
---|
| 1542 | for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64),
|
---|
| 1543 | output += sizeof(word64)) {
|
---|
| 1544 | ret = IntelRDrand64_r((word64 *)output);
|
---|
| 1545 | if (ret != 0)
|
---|
| 1546 | return ret;
|
---|
| 1547 | }
|
---|
| 1548 | if (sz == 0)
|
---|
| 1549 | return 0;
|
---|
| 1550 |
|
---|
| 1551 | /* handle unaligned remainder */
|
---|
| 1552 | ret = IntelRDrand64_r(&rndTmp);
|
---|
| 1553 | if (ret != 0)
|
---|
| 1554 | return ret;
|
---|
| 1555 |
|
---|
| 1556 | XMEMCPY(output, &rndTmp, sz);
|
---|
| 1557 |
|
---|
| 1558 | return 0;
|
---|
| 1559 | }
|
---|
| 1560 |
|
---|
| 1561 | #endif /* HAVE_INTEL_RDRAND */
|
---|
| 1562 | #endif /* HAVE_INTEL_RDRAND || HAVE_INTEL_RDSEED */
|
---|
| 1563 |
|
---|
| 1564 |
|
---|
| 1565 | /* Begin wc_GenerateSeed Implementations */
|
---|
| 1566 | #if defined(CUSTOM_RAND_GENERATE_SEED)
|
---|
| 1567 |
|
---|
| 1568 | /* Implement your own random generation function
|
---|
| 1569 | * Return 0 to indicate success
|
---|
| 1570 | * int rand_gen_seed(byte* output, word32 sz);
|
---|
| 1571 | * #define CUSTOM_RAND_GENERATE_SEED rand_gen_seed */
|
---|
| 1572 |
|
---|
| 1573 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1574 | {
|
---|
| 1575 | (void)os; /* Suppress unused arg warning */
|
---|
| 1576 | return CUSTOM_RAND_GENERATE_SEED(output, sz);
|
---|
| 1577 | }
|
---|
| 1578 |
|
---|
| 1579 | #elif defined(CUSTOM_RAND_GENERATE_SEED_OS)
|
---|
| 1580 |
|
---|
| 1581 | /* Implement your own random generation function,
|
---|
| 1582 | * which includes OS_Seed.
|
---|
| 1583 | * Return 0 to indicate success
|
---|
| 1584 | * int rand_gen_seed(OS_Seed* os, byte* output, word32 sz);
|
---|
| 1585 | * #define CUSTOM_RAND_GENERATE_SEED_OS rand_gen_seed */
|
---|
| 1586 |
|
---|
| 1587 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1588 | {
|
---|
| 1589 | return CUSTOM_RAND_GENERATE_SEED_OS(os, output, sz);
|
---|
| 1590 | }
|
---|
| 1591 |
|
---|
| 1592 | #elif defined(CUSTOM_RAND_GENERATE)
|
---|
| 1593 |
|
---|
| 1594 | /* Implement your own random generation function
|
---|
| 1595 | * word32 rand_gen(void);
|
---|
| 1596 | * #define CUSTOM_RAND_GENERATE rand_gen */
|
---|
| 1597 |
|
---|
| 1598 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1599 | {
|
---|
| 1600 | word32 i = 0;
|
---|
| 1601 |
|
---|
| 1602 | (void)os;
|
---|
| 1603 |
|
---|
| 1604 | while (i < sz)
|
---|
| 1605 | {
|
---|
| 1606 | /* If not aligned or there is odd/remainder */
|
---|
| 1607 | if( (i + sizeof(CUSTOM_RAND_TYPE)) > sz ||
|
---|
| 1608 | ((wolfssl_word)&output[i] % sizeof(CUSTOM_RAND_TYPE)) != 0
|
---|
| 1609 | ) {
|
---|
| 1610 | /* Single byte at a time */
|
---|
| 1611 | output[i++] = (byte)CUSTOM_RAND_GENERATE();
|
---|
| 1612 | }
|
---|
| 1613 | else {
|
---|
| 1614 | /* Use native 8, 16, 32 or 64 copy instruction */
|
---|
| 1615 | *((CUSTOM_RAND_TYPE*)&output[i]) = CUSTOM_RAND_GENERATE();
|
---|
| 1616 | i += sizeof(CUSTOM_RAND_TYPE);
|
---|
| 1617 | }
|
---|
| 1618 | }
|
---|
| 1619 |
|
---|
| 1620 | return 0;
|
---|
| 1621 | }
|
---|
| 1622 |
|
---|
| 1623 | #elif defined(WOLFSSL_SGX)
|
---|
| 1624 |
|
---|
| 1625 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1626 | {
|
---|
| 1627 | int ret = !SGX_SUCCESS;
|
---|
| 1628 | int i, read_max = 10;
|
---|
| 1629 |
|
---|
| 1630 | for (i = 0; i < read_max && ret != SGX_SUCCESS; i++) {
|
---|
| 1631 | ret = sgx_read_rand(output, sz);
|
---|
| 1632 | }
|
---|
| 1633 |
|
---|
| 1634 | (void)os;
|
---|
| 1635 | return (ret == SGX_SUCCESS) ? 0 : 1;
|
---|
| 1636 | }
|
---|
| 1637 |
|
---|
| 1638 | #elif defined(USE_WINDOWS_API)
|
---|
| 1639 |
|
---|
| 1640 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1641 | {
|
---|
| 1642 | #ifdef WOLF_CRYPTO_CB
|
---|
| 1643 | int ret;
|
---|
| 1644 |
|
---|
| 1645 | if (os != NULL && os->devId != INVALID_DEVID) {
|
---|
| 1646 | ret = wc_CryptoCb_RandomSeed(os, output, sz);
|
---|
| 1647 | if (ret != CRYPTOCB_UNAVAILABLE)
|
---|
| 1648 | return ret;
|
---|
| 1649 | /* fall-through when unavailable */
|
---|
| 1650 | }
|
---|
| 1651 | #endif
|
---|
| 1652 |
|
---|
| 1653 | #ifdef HAVE_INTEL_RDSEED
|
---|
| 1654 | if (IS_INTEL_RDSEED(intel_flags)) {
|
---|
| 1655 | if (!wc_GenerateSeed_IntelRD(NULL, output, sz)) {
|
---|
| 1656 | /* success, we're done */
|
---|
| 1657 | return 0;
|
---|
| 1658 | }
|
---|
| 1659 | #ifdef FORCE_FAILURE_RDSEED
|
---|
| 1660 | /* don't fall back to CryptoAPI */
|
---|
| 1661 | return READ_RAN_E;
|
---|
| 1662 | #endif
|
---|
| 1663 | }
|
---|
| 1664 | #endif /* HAVE_INTEL_RDSEED */
|
---|
| 1665 |
|
---|
| 1666 | if(!CryptAcquireContext(&os->handle, 0, 0, PROV_RSA_FULL,
|
---|
| 1667 | CRYPT_VERIFYCONTEXT))
|
---|
| 1668 | return WINCRYPT_E;
|
---|
| 1669 |
|
---|
| 1670 | if (!CryptGenRandom(os->handle, sz, output))
|
---|
| 1671 | return CRYPTGEN_E;
|
---|
| 1672 |
|
---|
| 1673 | CryptReleaseContext(os->handle, 0);
|
---|
| 1674 |
|
---|
| 1675 | return 0;
|
---|
| 1676 | }
|
---|
| 1677 |
|
---|
| 1678 |
|
---|
| 1679 | #elif defined(HAVE_RTP_SYS) || defined(EBSNET)
|
---|
| 1680 |
|
---|
| 1681 | #include "rtprand.h" /* rtp_rand () */
|
---|
| 1682 | #include "rtptime.h" /* rtp_get_system_msec() */
|
---|
| 1683 |
|
---|
| 1684 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1685 | {
|
---|
| 1686 | word32 i;
|
---|
| 1687 |
|
---|
| 1688 | rtp_srand(rtp_get_system_msec());
|
---|
| 1689 | for (i = 0; i < sz; i++ ) {
|
---|
| 1690 | output[i] = rtp_rand() % 256;
|
---|
| 1691 | }
|
---|
| 1692 |
|
---|
| 1693 | return 0;
|
---|
| 1694 | }
|
---|
| 1695 |
|
---|
[464] | 1696 | #elif (defined(WOLFSSL_ATMEL) || defined(WOLFSSL_ATECC_RNG)) && \
|
---|
| 1697 | !defined(WOLFSSL_PIC32MZ_RNG)
|
---|
| 1698 | /* enable ATECC RNG unless using PIC32MZ one instead */
|
---|
| 1699 | #include <wolfssl/wolfcrypt/port/atmel/atmel.h>
|
---|
[457] | 1700 |
|
---|
[464] | 1701 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1702 | {
|
---|
| 1703 | int ret = 0;
|
---|
| 1704 |
|
---|
| 1705 | (void)os;
|
---|
| 1706 | if (output == NULL) {
|
---|
| 1707 | return BUFFER_E;
|
---|
| 1708 | }
|
---|
| 1709 |
|
---|
| 1710 | ret = atmel_get_random_number(sz, output);
|
---|
| 1711 |
|
---|
| 1712 | return ret;
|
---|
| 1713 | }
|
---|
| 1714 |
|
---|
[457] | 1715 | #elif defined(MICROCHIP_PIC32)
|
---|
| 1716 |
|
---|
| 1717 | #ifdef MICROCHIP_MPLAB_HARMONY
|
---|
| 1718 | #ifdef MICROCHIP_MPLAB_HARMONY_3
|
---|
| 1719 | #include "system/time/sys_time.h"
|
---|
| 1720 | #define PIC32_SEED_COUNT SYS_TIME_CounterGet
|
---|
| 1721 | #else
|
---|
| 1722 | #define PIC32_SEED_COUNT _CP0_GET_COUNT
|
---|
| 1723 | #endif
|
---|
| 1724 | #else
|
---|
| 1725 | #if !defined(WOLFSSL_MICROCHIP_PIC32MZ)
|
---|
| 1726 | #include <peripheral/timer.h>
|
---|
| 1727 | #endif
|
---|
| 1728 | extern word32 ReadCoreTimer(void);
|
---|
| 1729 | #define PIC32_SEED_COUNT ReadCoreTimer
|
---|
| 1730 | #endif
|
---|
| 1731 |
|
---|
| 1732 | #ifdef WOLFSSL_PIC32MZ_RNG
|
---|
| 1733 | #include "xc.h"
|
---|
| 1734 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1735 | {
|
---|
| 1736 | int i;
|
---|
| 1737 | byte rnd[8];
|
---|
| 1738 | word32 *rnd32 = (word32 *)rnd;
|
---|
| 1739 | word32 size = sz;
|
---|
| 1740 | byte* op = output;
|
---|
| 1741 |
|
---|
| 1742 | #if ((__PIC32_FEATURE_SET0 == 'E') && (__PIC32_FEATURE_SET1 == 'C'))
|
---|
| 1743 | RNGNUMGEN1 = _CP0_GET_COUNT();
|
---|
| 1744 | RNGPOLY1 = _CP0_GET_COUNT();
|
---|
| 1745 | RNGPOLY2 = _CP0_GET_COUNT();
|
---|
| 1746 | RNGNUMGEN2 = _CP0_GET_COUNT();
|
---|
| 1747 | #else
|
---|
| 1748 | // All others can be seeded from the TRNG
|
---|
| 1749 | RNGCONbits.TRNGMODE = 1;
|
---|
| 1750 | RNGCONbits.TRNGEN = 1;
|
---|
| 1751 | while (RNGCNT < 64);
|
---|
| 1752 | RNGCONbits.LOAD = 1;
|
---|
| 1753 | while (RNGCONbits.LOAD == 1);
|
---|
| 1754 | while (RNGCNT < 64);
|
---|
| 1755 | RNGPOLY2 = RNGSEED2;
|
---|
| 1756 | RNGPOLY1 = RNGSEED1;
|
---|
| 1757 | #endif
|
---|
| 1758 |
|
---|
| 1759 | RNGCONbits.PLEN = 0x40;
|
---|
| 1760 | RNGCONbits.PRNGEN = 1;
|
---|
| 1761 | for (i=0; i<5; i++) { /* wait for RNGNUMGEN ready */
|
---|
| 1762 | volatile int x, y;
|
---|
| 1763 | x = RNGNUMGEN1;
|
---|
| 1764 | y = RNGNUMGEN2;
|
---|
| 1765 | (void)x;
|
---|
| 1766 | (void)y;
|
---|
| 1767 | }
|
---|
| 1768 | do {
|
---|
| 1769 | rnd32[0] = RNGNUMGEN1;
|
---|
| 1770 | rnd32[1] = RNGNUMGEN2;
|
---|
| 1771 |
|
---|
| 1772 | for(i=0; i<8; i++, op++) {
|
---|
| 1773 | *op = rnd[i];
|
---|
| 1774 | size --;
|
---|
| 1775 | if(size==0)break;
|
---|
| 1776 | }
|
---|
| 1777 | } while(size);
|
---|
| 1778 | return 0;
|
---|
| 1779 | }
|
---|
| 1780 | #else /* WOLFSSL_PIC32MZ_RNG */
|
---|
| 1781 | /* uses the core timer, in nanoseconds to seed srand */
|
---|
| 1782 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1783 | {
|
---|
| 1784 | int i;
|
---|
| 1785 | srand(PIC32_SEED_COUNT() * 25);
|
---|
| 1786 |
|
---|
| 1787 | for (i = 0; i < sz; i++ ) {
|
---|
| 1788 | output[i] = rand() % 256;
|
---|
| 1789 | if ( (i % 8) == 7)
|
---|
| 1790 | srand(PIC32_SEED_COUNT() * 25);
|
---|
| 1791 | }
|
---|
| 1792 | return 0;
|
---|
| 1793 | }
|
---|
| 1794 | #endif /* WOLFSSL_PIC32MZ_RNG */
|
---|
| 1795 |
|
---|
| 1796 | #elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) || \
|
---|
| 1797 | defined(FREESCALE_KSDK_BM) || defined(FREESCALE_FREE_RTOS)
|
---|
| 1798 |
|
---|
| 1799 | #if defined(FREESCALE_K70_RNGA) || defined(FREESCALE_RNGA)
|
---|
| 1800 | /*
|
---|
| 1801 | * wc_Generates a RNG seed using the Random Number Generator Accelerator
|
---|
| 1802 | * on the Kinetis K70. Documentation located in Chapter 37 of
|
---|
| 1803 | * K70 Sub-Family Reference Manual (see Note 3 in the README for link).
|
---|
| 1804 | */
|
---|
| 1805 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1806 | {
|
---|
| 1807 | word32 i;
|
---|
| 1808 |
|
---|
| 1809 | /* turn on RNGA module */
|
---|
| 1810 | #if defined(SIM_SCGC3_RNGA_MASK)
|
---|
| 1811 | SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK;
|
---|
| 1812 | #endif
|
---|
| 1813 | #if defined(SIM_SCGC6_RNGA_MASK)
|
---|
| 1814 | /* additionally needed for at least K64F */
|
---|
| 1815 | SIM_SCGC6 |= SIM_SCGC6_RNGA_MASK;
|
---|
| 1816 | #endif
|
---|
| 1817 |
|
---|
| 1818 | /* set SLP bit to 0 - "RNGA is not in sleep mode" */
|
---|
| 1819 | RNG_CR &= ~RNG_CR_SLP_MASK;
|
---|
| 1820 |
|
---|
| 1821 | /* set HA bit to 1 - "security violations masked" */
|
---|
| 1822 | RNG_CR |= RNG_CR_HA_MASK;
|
---|
| 1823 |
|
---|
| 1824 | /* set GO bit to 1 - "output register loaded with data" */
|
---|
| 1825 | RNG_CR |= RNG_CR_GO_MASK;
|
---|
| 1826 |
|
---|
| 1827 | for (i = 0; i < sz; i++) {
|
---|
| 1828 |
|
---|
| 1829 | /* wait for RNG FIFO to be full */
|
---|
| 1830 | while((RNG_SR & RNG_SR_OREG_LVL(0xF)) == 0) {}
|
---|
| 1831 |
|
---|
| 1832 | /* get value */
|
---|
| 1833 | output[i] = RNG_OR;
|
---|
| 1834 | }
|
---|
| 1835 |
|
---|
| 1836 | return 0;
|
---|
| 1837 | }
|
---|
| 1838 |
|
---|
| 1839 | #elif defined(FREESCALE_K53_RNGB) || defined(FREESCALE_RNGB)
|
---|
| 1840 | /*
|
---|
| 1841 | * wc_Generates a RNG seed using the Random Number Generator (RNGB)
|
---|
| 1842 | * on the Kinetis K53. Documentation located in Chapter 33 of
|
---|
| 1843 | * K53 Sub-Family Reference Manual (see note in the README for link).
|
---|
| 1844 | */
|
---|
| 1845 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1846 | {
|
---|
| 1847 | int i;
|
---|
| 1848 |
|
---|
| 1849 | /* turn on RNGB module */
|
---|
| 1850 | SIM_SCGC3 |= SIM_SCGC3_RNGB_MASK;
|
---|
| 1851 |
|
---|
| 1852 | /* reset RNGB */
|
---|
| 1853 | RNG_CMD |= RNG_CMD_SR_MASK;
|
---|
| 1854 |
|
---|
| 1855 | /* FIFO generate interrupt, return all zeros on underflow,
|
---|
| 1856 | * set auto reseed */
|
---|
| 1857 | RNG_CR |= (RNG_CR_FUFMOD_MASK | RNG_CR_AR_MASK);
|
---|
| 1858 |
|
---|
| 1859 | /* gen seed, clear interrupts, clear errors */
|
---|
| 1860 | RNG_CMD |= (RNG_CMD_GS_MASK | RNG_CMD_CI_MASK | RNG_CMD_CE_MASK);
|
---|
| 1861 |
|
---|
| 1862 | /* wait for seeding to complete */
|
---|
| 1863 | while ((RNG_SR & RNG_SR_SDN_MASK) == 0) {}
|
---|
| 1864 |
|
---|
| 1865 | for (i = 0; i < sz; i++) {
|
---|
| 1866 |
|
---|
| 1867 | /* wait for a word to be available from FIFO */
|
---|
| 1868 | while((RNG_SR & RNG_SR_FIFO_LVL_MASK) == 0) {}
|
---|
| 1869 |
|
---|
| 1870 | /* get value */
|
---|
| 1871 | output[i] = RNG_OUT;
|
---|
| 1872 | }
|
---|
| 1873 |
|
---|
| 1874 | return 0;
|
---|
| 1875 | }
|
---|
| 1876 |
|
---|
| 1877 | #elif defined(FREESCALE_KSDK_2_0_TRNG)
|
---|
| 1878 |
|
---|
| 1879 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1880 | {
|
---|
| 1881 | status_t status;
|
---|
| 1882 | status = TRNG_GetRandomData(TRNG0, output, sz);
|
---|
| 1883 | if (status == kStatus_Success)
|
---|
| 1884 | {
|
---|
| 1885 | return(0);
|
---|
| 1886 | }
|
---|
| 1887 | else
|
---|
| 1888 | {
|
---|
| 1889 | return RAN_BLOCK_E;
|
---|
| 1890 | }
|
---|
| 1891 | }
|
---|
| 1892 |
|
---|
| 1893 | #elif defined(FREESCALE_KSDK_2_0_RNGA)
|
---|
| 1894 |
|
---|
| 1895 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1896 | {
|
---|
| 1897 | status_t status;
|
---|
| 1898 | status = RNGA_GetRandomData(RNG, output, sz);
|
---|
| 1899 | if (status == kStatus_Success)
|
---|
| 1900 | {
|
---|
| 1901 | return(0);
|
---|
| 1902 | }
|
---|
| 1903 | else
|
---|
| 1904 | {
|
---|
| 1905 | return RAN_BLOCK_E;
|
---|
| 1906 | }
|
---|
| 1907 | }
|
---|
| 1908 |
|
---|
| 1909 |
|
---|
| 1910 | #elif defined(FREESCALE_RNGA)
|
---|
| 1911 |
|
---|
| 1912 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1913 | {
|
---|
| 1914 | RNGA_DRV_GetRandomData(RNGA_INSTANCE, output, sz);
|
---|
| 1915 | return 0;
|
---|
| 1916 | }
|
---|
| 1917 |
|
---|
| 1918 | #else
|
---|
| 1919 | #define USE_TEST_GENSEED
|
---|
| 1920 | #endif /* FREESCALE_K70_RNGA */
|
---|
| 1921 |
|
---|
[464] | 1922 | #elif defined(WOLFSSL_SILABS_SE_ACCEL)
|
---|
| 1923 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1924 | {
|
---|
| 1925 | (void)os;
|
---|
| 1926 | return silabs_GenerateRand(output, sz);
|
---|
| 1927 | }
|
---|
| 1928 |
|
---|
[457] | 1929 | #elif defined(STM32_RNG)
|
---|
| 1930 | /* Generate a RNG seed using the hardware random number generator
|
---|
| 1931 | * on the STM32F2/F4/F7/L4. */
|
---|
| 1932 |
|
---|
| 1933 | #ifdef WOLFSSL_STM32_CUBEMX
|
---|
| 1934 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1935 | {
|
---|
| 1936 | int ret;
|
---|
| 1937 | RNG_HandleTypeDef hrng;
|
---|
| 1938 | word32 i = 0;
|
---|
| 1939 | (void)os;
|
---|
| 1940 |
|
---|
| 1941 | ret = wolfSSL_CryptHwMutexLock();
|
---|
| 1942 | if (ret != 0) {
|
---|
| 1943 | return ret;
|
---|
| 1944 | }
|
---|
| 1945 |
|
---|
| 1946 | /* enable RNG clock source */
|
---|
| 1947 | __HAL_RCC_RNG_CLK_ENABLE();
|
---|
| 1948 |
|
---|
| 1949 | /* enable RNG peripheral */
|
---|
| 1950 | XMEMSET(&hrng, 0, sizeof(hrng));
|
---|
| 1951 | hrng.Instance = RNG;
|
---|
| 1952 | HAL_RNG_Init(&hrng);
|
---|
| 1953 |
|
---|
| 1954 | while (i < sz) {
|
---|
| 1955 | /* If not aligned or there is odd/remainder */
|
---|
| 1956 | if( (i + sizeof(word32)) > sz ||
|
---|
| 1957 | ((wolfssl_word)&output[i] % sizeof(word32)) != 0
|
---|
| 1958 | ) {
|
---|
| 1959 | /* Single byte at a time */
|
---|
[464] | 1960 | word32 tmpRng = 0;
|
---|
[457] | 1961 | if (HAL_RNG_GenerateRandomNumber(&hrng, &tmpRng) != HAL_OK) {
|
---|
| 1962 | wolfSSL_CryptHwMutexUnLock();
|
---|
| 1963 | return RAN_BLOCK_E;
|
---|
| 1964 | }
|
---|
| 1965 | output[i++] = (byte)tmpRng;
|
---|
| 1966 | }
|
---|
| 1967 | else {
|
---|
| 1968 | /* Use native 32 instruction */
|
---|
[464] | 1969 | if (HAL_RNG_GenerateRandomNumber(&hrng, (word32*)&output[i]) != HAL_OK) {
|
---|
[457] | 1970 | wolfSSL_CryptHwMutexUnLock();
|
---|
| 1971 | return RAN_BLOCK_E;
|
---|
| 1972 | }
|
---|
| 1973 | i += sizeof(word32);
|
---|
| 1974 | }
|
---|
| 1975 | }
|
---|
| 1976 |
|
---|
| 1977 | wolfSSL_CryptHwMutexUnLock();
|
---|
| 1978 |
|
---|
| 1979 | return 0;
|
---|
| 1980 | }
|
---|
| 1981 | #elif defined(WOLFSSL_STM32F427_RNG) || defined(WOLFSSL_STM32_RNG_NOLIB)
|
---|
| 1982 |
|
---|
| 1983 | /* Generate a RNG seed using the hardware RNG on the STM32F427
|
---|
| 1984 | * directly, following steps outlined in STM32F4 Reference
|
---|
| 1985 | * Manual (Chapter 24) for STM32F4xx family. */
|
---|
| 1986 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 1987 | {
|
---|
| 1988 | int ret;
|
---|
| 1989 | word32 i;
|
---|
| 1990 | (void)os;
|
---|
| 1991 |
|
---|
| 1992 | ret = wolfSSL_CryptHwMutexLock();
|
---|
| 1993 | if (ret != 0) {
|
---|
| 1994 | return ret;
|
---|
| 1995 | }
|
---|
| 1996 |
|
---|
| 1997 | /* enable RNG peripheral clock */
|
---|
| 1998 | RCC->AHB2ENR |= RCC_AHB2ENR_RNGEN;
|
---|
| 1999 |
|
---|
| 2000 | /* enable RNG interrupt, set IE bit in RNG->CR register */
|
---|
| 2001 | RNG->CR |= RNG_CR_IE;
|
---|
| 2002 |
|
---|
| 2003 | /* enable RNG, set RNGEN bit in RNG->CR. Activates RNG,
|
---|
| 2004 | * RNG_LFSR, and error detector */
|
---|
| 2005 | RNG->CR |= RNG_CR_RNGEN;
|
---|
| 2006 |
|
---|
| 2007 | /* verify no errors, make sure SEIS and CEIS bits are 0
|
---|
| 2008 | * in RNG->SR register */
|
---|
| 2009 | if (RNG->SR & (RNG_SR_SECS | RNG_SR_CECS)) {
|
---|
| 2010 | wolfSSL_CryptHwMutexUnLock();
|
---|
| 2011 | return RNG_FAILURE_E;
|
---|
| 2012 | }
|
---|
| 2013 |
|
---|
| 2014 | for (i = 0; i < sz; i++) {
|
---|
| 2015 | /* wait until RNG number is ready */
|
---|
| 2016 | while ((RNG->SR & RNG_SR_DRDY) == 0) { }
|
---|
| 2017 |
|
---|
| 2018 | /* get value */
|
---|
| 2019 | output[i] = RNG->DR;
|
---|
| 2020 | }
|
---|
| 2021 |
|
---|
| 2022 | wolfSSL_CryptHwMutexUnLock();
|
---|
| 2023 |
|
---|
| 2024 | return 0;
|
---|
| 2025 | }
|
---|
| 2026 |
|
---|
| 2027 | #else
|
---|
| 2028 |
|
---|
| 2029 | /* Generate a RNG seed using the STM32 Standard Peripheral Library */
|
---|
| 2030 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2031 | {
|
---|
| 2032 | int ret;
|
---|
| 2033 | word32 i;
|
---|
| 2034 | (void)os;
|
---|
| 2035 |
|
---|
| 2036 | ret = wolfSSL_CryptHwMutexLock();
|
---|
| 2037 | if (ret != 0) {
|
---|
| 2038 | return ret;
|
---|
| 2039 | }
|
---|
| 2040 |
|
---|
| 2041 | /* enable RNG clock source */
|
---|
| 2042 | RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
|
---|
| 2043 |
|
---|
| 2044 | /* reset RNG */
|
---|
| 2045 | RNG_DeInit();
|
---|
| 2046 |
|
---|
| 2047 | /* enable RNG peripheral */
|
---|
| 2048 | RNG_Cmd(ENABLE);
|
---|
| 2049 |
|
---|
| 2050 | /* verify no errors with RNG_CLK or Seed */
|
---|
| 2051 | if (RNG_GetFlagStatus(RNG_FLAG_SECS | RNG_FLAG_CECS) != RESET) {
|
---|
| 2052 | wolfSSL_CryptHwMutexUnLock();
|
---|
| 2053 | return RNG_FAILURE_E;
|
---|
| 2054 | }
|
---|
| 2055 |
|
---|
| 2056 | for (i = 0; i < sz; i++) {
|
---|
| 2057 | /* wait until RNG number is ready */
|
---|
| 2058 | while (RNG_GetFlagStatus(RNG_FLAG_DRDY) == RESET) { }
|
---|
| 2059 |
|
---|
| 2060 | /* get value */
|
---|
| 2061 | output[i] = RNG_GetRandomNumber();
|
---|
| 2062 | }
|
---|
| 2063 |
|
---|
| 2064 | wolfSSL_CryptHwMutexUnLock();
|
---|
| 2065 |
|
---|
| 2066 | return 0;
|
---|
| 2067 | }
|
---|
| 2068 | #endif /* WOLFSSL_STM32_CUBEMX */
|
---|
| 2069 |
|
---|
| 2070 | #elif defined(WOLFSSL_TIRTOS)
|
---|
| 2071 |
|
---|
| 2072 | #include <xdc/runtime/Timestamp.h>
|
---|
| 2073 | #include <stdlib.h>
|
---|
| 2074 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2075 | {
|
---|
| 2076 | int i;
|
---|
| 2077 | srand(xdc_runtime_Timestamp_get32());
|
---|
| 2078 |
|
---|
| 2079 | for (i = 0; i < sz; i++ ) {
|
---|
| 2080 | output[i] = rand() % 256;
|
---|
| 2081 | if ((i % 8) == 7) {
|
---|
| 2082 | srand(xdc_runtime_Timestamp_get32());
|
---|
| 2083 | }
|
---|
| 2084 | }
|
---|
| 2085 |
|
---|
| 2086 | return 0;
|
---|
| 2087 | }
|
---|
| 2088 |
|
---|
| 2089 | #elif defined(WOLFSSL_PB)
|
---|
| 2090 |
|
---|
| 2091 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2092 | {
|
---|
| 2093 | word32 i;
|
---|
| 2094 | for (i = 0; i < sz; i++)
|
---|
| 2095 | output[i] = UTL_Rand();
|
---|
| 2096 |
|
---|
| 2097 | (void)os;
|
---|
| 2098 |
|
---|
| 2099 | return 0;
|
---|
| 2100 | }
|
---|
| 2101 |
|
---|
| 2102 | #elif defined(WOLFSSL_NUCLEUS)
|
---|
| 2103 | #include "nucleus.h"
|
---|
| 2104 | #include "kernel/plus_common.h"
|
---|
| 2105 |
|
---|
| 2106 | #warning "potential for not enough entropy, currently being used for testing"
|
---|
| 2107 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2108 | {
|
---|
| 2109 | int i;
|
---|
| 2110 | srand(NU_Get_Time_Stamp());
|
---|
| 2111 |
|
---|
| 2112 | for (i = 0; i < sz; i++ ) {
|
---|
| 2113 | output[i] = rand() % 256;
|
---|
| 2114 | if ((i % 8) == 7) {
|
---|
| 2115 | srand(NU_Get_Time_Stamp());
|
---|
| 2116 | }
|
---|
| 2117 | }
|
---|
| 2118 |
|
---|
| 2119 | return 0;
|
---|
| 2120 | }
|
---|
| 2121 | #elif defined(WOLFSSL_DEOS) && !defined(CUSTOM_RAND_GENERATE)
|
---|
| 2122 | #include "stdlib.h"
|
---|
| 2123 |
|
---|
| 2124 | #warning "potential for not enough entropy, currently being used for testing Deos"
|
---|
| 2125 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2126 | {
|
---|
| 2127 | int i;
|
---|
| 2128 | int seed = XTIME(0);
|
---|
| 2129 | (void)os;
|
---|
| 2130 |
|
---|
| 2131 | for (i = 0; i < sz; i++ ) {
|
---|
| 2132 | output[i] = rand_r(&seed) % 256;
|
---|
| 2133 | if ((i % 8) == 7) {
|
---|
| 2134 | seed = XTIME(0);
|
---|
| 2135 | rand_r(&seed);
|
---|
| 2136 | }
|
---|
| 2137 | }
|
---|
| 2138 |
|
---|
| 2139 | return 0;
|
---|
| 2140 | }
|
---|
| 2141 | #elif defined(WOLFSSL_VXWORKS)
|
---|
| 2142 |
|
---|
| 2143 | #include <randomNumGen.h>
|
---|
| 2144 |
|
---|
| 2145 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) {
|
---|
| 2146 | STATUS status;
|
---|
| 2147 |
|
---|
| 2148 | #ifdef VXWORKS_SIM
|
---|
| 2149 | /* cannot generate true entropy with VxWorks simulator */
|
---|
| 2150 | #warning "not enough entropy, simulator for testing only"
|
---|
| 2151 | int i = 0;
|
---|
| 2152 |
|
---|
| 2153 | for (i = 0; i < 1000; i++) {
|
---|
| 2154 | randomAddTimeStamp();
|
---|
| 2155 | }
|
---|
| 2156 | #endif
|
---|
| 2157 |
|
---|
| 2158 | status = randBytes (output, sz);
|
---|
| 2159 | if (status == ERROR) {
|
---|
| 2160 | return RNG_FAILURE_E;
|
---|
| 2161 | }
|
---|
| 2162 |
|
---|
| 2163 | return 0;
|
---|
| 2164 | }
|
---|
| 2165 |
|
---|
[464] | 2166 | #elif defined(WOLFSSL_NRF51) || defined(WOLFSSL_NRF5x)
|
---|
[457] | 2167 | #include "app_error.h"
|
---|
| 2168 | #include "nrf_drv_rng.h"
|
---|
| 2169 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2170 | {
|
---|
| 2171 | int remaining = sz, length, pos = 0;
|
---|
[464] | 2172 | word32 err_code;
|
---|
| 2173 | byte available;
|
---|
| 2174 | static byte initialized = 0;
|
---|
[457] | 2175 |
|
---|
| 2176 | (void)os;
|
---|
| 2177 |
|
---|
| 2178 | /* Make sure RNG is running */
|
---|
[464] | 2179 | if (!initialized) {
|
---|
| 2180 | err_code = nrf_drv_rng_init(NULL);
|
---|
| 2181 | if (err_code != NRF_SUCCESS && err_code != NRF_ERROR_INVALID_STATE
|
---|
| 2182 | #ifdef NRF_ERROR_MODULE_ALREADY_INITIALIZED
|
---|
| 2183 | && err_code != NRF_ERROR_MODULE_ALREADY_INITIALIZED
|
---|
| 2184 | #endif
|
---|
| 2185 | ) {
|
---|
| 2186 | return -1;
|
---|
| 2187 | }
|
---|
| 2188 | initialized = 1;
|
---|
[457] | 2189 | }
|
---|
| 2190 |
|
---|
| 2191 | while (remaining > 0) {
|
---|
[464] | 2192 | available = 0;
|
---|
| 2193 | nrf_drv_rng_bytes_available(&available); /* void func */
|
---|
| 2194 | length = (remaining < available) ? remaining : available;
|
---|
| 2195 | if (length > 0) {
|
---|
| 2196 | err_code = nrf_drv_rng_rand(&output[pos], length);
|
---|
| 2197 | if (err_code != NRF_SUCCESS) {
|
---|
| 2198 | break;
|
---|
[457] | 2199 | }
|
---|
[464] | 2200 | remaining -= length;
|
---|
| 2201 | pos += length;
|
---|
[457] | 2202 | }
|
---|
| 2203 | }
|
---|
| 2204 |
|
---|
| 2205 | return (err_code == NRF_SUCCESS) ? 0 : -1;
|
---|
| 2206 | }
|
---|
| 2207 |
|
---|
| 2208 | #elif defined(HAVE_WNR)
|
---|
| 2209 |
|
---|
| 2210 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2211 | {
|
---|
| 2212 | if (os == NULL || output == NULL || wnr_ctx == NULL ||
|
---|
| 2213 | wnr_timeout < 0) {
|
---|
| 2214 | return BAD_FUNC_ARG;
|
---|
| 2215 | }
|
---|
| 2216 |
|
---|
| 2217 | if (wnr_mutex_init == 0) {
|
---|
| 2218 | WOLFSSL_MSG("netRandom context must be created before use");
|
---|
| 2219 | return RNG_FAILURE_E;
|
---|
| 2220 | }
|
---|
| 2221 |
|
---|
| 2222 | if (wc_LockMutex(&wnr_mutex) != 0) {
|
---|
| 2223 | WOLFSSL_MSG("Bad Lock Mutex wnr_mutex\n");
|
---|
| 2224 | return BAD_MUTEX_E;
|
---|
| 2225 | }
|
---|
| 2226 |
|
---|
| 2227 | if (wnr_get_entropy(wnr_ctx, wnr_timeout, output, sz, sz) !=
|
---|
| 2228 | WNR_ERROR_NONE)
|
---|
| 2229 | return RNG_FAILURE_E;
|
---|
| 2230 |
|
---|
| 2231 | wc_UnLockMutex(&wnr_mutex);
|
---|
| 2232 |
|
---|
| 2233 | return 0;
|
---|
| 2234 | }
|
---|
| 2235 |
|
---|
| 2236 | #elif defined(INTIME_RTOS)
|
---|
| 2237 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2238 | {
|
---|
| 2239 | int ret = 0;
|
---|
| 2240 |
|
---|
| 2241 | (void)os;
|
---|
| 2242 |
|
---|
| 2243 | if (output == NULL) {
|
---|
| 2244 | return BUFFER_E;
|
---|
| 2245 | }
|
---|
| 2246 |
|
---|
| 2247 | /* Note: Investigate better solution */
|
---|
| 2248 | /* no return to check */
|
---|
| 2249 | arc4random_buf(output, sz);
|
---|
| 2250 |
|
---|
| 2251 | return ret;
|
---|
| 2252 | }
|
---|
| 2253 |
|
---|
| 2254 | #elif defined(WOLFSSL_WICED)
|
---|
| 2255 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2256 | {
|
---|
| 2257 | int ret;
|
---|
| 2258 | (void)os;
|
---|
| 2259 |
|
---|
| 2260 | if (output == NULL || UINT16_MAX < sz) {
|
---|
| 2261 | return BUFFER_E;
|
---|
| 2262 | }
|
---|
| 2263 |
|
---|
| 2264 | if ((ret = wiced_crypto_get_random((void*) output, sz) )
|
---|
| 2265 | != WICED_SUCCESS) {
|
---|
| 2266 | return ret;
|
---|
| 2267 | }
|
---|
| 2268 |
|
---|
| 2269 | return ret;
|
---|
| 2270 | }
|
---|
| 2271 |
|
---|
| 2272 | #elif defined(WOLFSSL_NETBURNER)
|
---|
| 2273 | #warning using NetBurner pseudo random GetRandomByte for seed
|
---|
| 2274 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2275 | {
|
---|
| 2276 | word32 i;
|
---|
| 2277 | (void)os;
|
---|
| 2278 |
|
---|
| 2279 | if (output == NULL) {
|
---|
| 2280 | return BUFFER_E;
|
---|
| 2281 | }
|
---|
| 2282 |
|
---|
| 2283 | for (i = 0; i < sz; i++) {
|
---|
| 2284 | output[i] = GetRandomByte();
|
---|
| 2285 |
|
---|
| 2286 | /* check if was a valid random number */
|
---|
| 2287 | if (!RandomValid())
|
---|
| 2288 | return RNG_FAILURE_E;
|
---|
| 2289 | }
|
---|
| 2290 |
|
---|
| 2291 | return 0;
|
---|
| 2292 | }
|
---|
| 2293 | #elif defined(IDIRECT_DEV_RANDOM)
|
---|
| 2294 |
|
---|
| 2295 | extern int getRandom( int sz, unsigned char *output );
|
---|
| 2296 |
|
---|
| 2297 | int GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2298 | {
|
---|
| 2299 | int num_bytes_returned = 0;
|
---|
| 2300 |
|
---|
| 2301 | num_bytes_returned = getRandom( (int) sz, (unsigned char *) output );
|
---|
| 2302 |
|
---|
| 2303 | return 0;
|
---|
| 2304 | }
|
---|
| 2305 |
|
---|
| 2306 | #elif (defined(WOLFSSL_IMX6_CAAM) || defined(WOLFSSL_IMX6_CAAM_RNG))
|
---|
| 2307 |
|
---|
| 2308 | #include <wolfssl/wolfcrypt/port/caam/wolfcaam.h>
|
---|
| 2309 | #include <wolfssl/wolfcrypt/port/caam/caam_driver.h>
|
---|
| 2310 |
|
---|
| 2311 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2312 | {
|
---|
| 2313 | Buffer buf[1];
|
---|
| 2314 | int ret = 0;
|
---|
| 2315 | int times = 1000, i;
|
---|
| 2316 |
|
---|
| 2317 | (void)os;
|
---|
| 2318 |
|
---|
| 2319 | if (output == NULL) {
|
---|
| 2320 | return BUFFER_E;
|
---|
| 2321 | }
|
---|
| 2322 |
|
---|
| 2323 | buf[0].BufferType = DataBuffer | LastBuffer;
|
---|
| 2324 | buf[0].TheAddress = (Address)output;
|
---|
| 2325 | buf[0].Length = sz;
|
---|
| 2326 |
|
---|
| 2327 | /* Check Waiting to make sure entropy is ready */
|
---|
| 2328 | for (i = 0; i < times; i++) {
|
---|
| 2329 | ret = wc_caamAddAndWait(buf, NULL, CAAM_ENTROPY);
|
---|
| 2330 | if (ret == Success) {
|
---|
| 2331 | break;
|
---|
| 2332 | }
|
---|
| 2333 |
|
---|
| 2334 | /* driver could be waiting for entropy */
|
---|
| 2335 | if (ret != RAN_BLOCK_E) {
|
---|
| 2336 | return ret;
|
---|
| 2337 | }
|
---|
| 2338 | usleep(100);
|
---|
| 2339 | }
|
---|
| 2340 |
|
---|
| 2341 | if (i == times && ret != Success) {
|
---|
| 2342 | return RNG_FAILURE_E;
|
---|
| 2343 | }
|
---|
| 2344 | else { /* Success case */
|
---|
| 2345 | ret = 0;
|
---|
| 2346 | }
|
---|
| 2347 |
|
---|
| 2348 | return ret;
|
---|
| 2349 | }
|
---|
| 2350 |
|
---|
| 2351 | #elif defined(WOLFSSL_APACHE_MYNEWT)
|
---|
| 2352 |
|
---|
| 2353 | #include <stdlib.h>
|
---|
| 2354 | #include "os/os_time.h"
|
---|
| 2355 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2356 | {
|
---|
| 2357 | int i;
|
---|
| 2358 | srand(os_time_get());
|
---|
| 2359 |
|
---|
| 2360 | for (i = 0; i < sz; i++ ) {
|
---|
| 2361 | output[i] = rand() % 256;
|
---|
| 2362 | if ((i % 8) == 7) {
|
---|
| 2363 | srand(os_time_get());
|
---|
| 2364 | }
|
---|
| 2365 | }
|
---|
| 2366 |
|
---|
| 2367 | return 0;
|
---|
| 2368 | }
|
---|
| 2369 |
|
---|
| 2370 | #elif defined(WOLFSSL_ESPIDF)
|
---|
| 2371 | #if defined(WOLFSSL_ESPWROOM32) || defined(WOLFSSL_ESPWROOM32SE)
|
---|
| 2372 | #include <esp_system.h>
|
---|
| 2373 |
|
---|
| 2374 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2375 | {
|
---|
| 2376 | word32 rand;
|
---|
| 2377 | while (sz > 0) {
|
---|
| 2378 | word32 len = sizeof(rand);
|
---|
| 2379 | if (sz < len)
|
---|
| 2380 | len = sz;
|
---|
| 2381 | /* Get one random 32-bit word from hw RNG */
|
---|
| 2382 | rand = esp_random( );
|
---|
| 2383 | XMEMCPY(output, &rand, len);
|
---|
| 2384 | output += len;
|
---|
| 2385 | sz -= len;
|
---|
| 2386 | }
|
---|
| 2387 |
|
---|
| 2388 | return 0;
|
---|
| 2389 | }
|
---|
| 2390 | #endif /* end WOLFSSL_ESPWROOM32 */
|
---|
| 2391 |
|
---|
[464] | 2392 | #elif defined(WOLFSSL_LINUXKM)
|
---|
| 2393 | #include <linux/random.h>
|
---|
| 2394 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2395 | {
|
---|
| 2396 | (void)os;
|
---|
| 2397 |
|
---|
| 2398 | get_random_bytes(output, sz);
|
---|
| 2399 |
|
---|
| 2400 | return 0;
|
---|
| 2401 | }
|
---|
| 2402 |
|
---|
[457] | 2403 | #elif defined(WOLFSSL_RENESAS_TSIP)
|
---|
| 2404 | #if defined(WOLFSSL_RENESA_TSIP_IAREWRX)
|
---|
[464] | 2405 | #include "r_bsp/mcu/all/r_rx_compiler.h"
|
---|
[457] | 2406 | #endif
|
---|
[464] | 2407 | #include "r_bsp/platform.h"
|
---|
[457] | 2408 | #include "r_tsip_rx_if.h"
|
---|
[464] | 2409 |
|
---|
[457] | 2410 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2411 | {
|
---|
| 2412 | int ret;
|
---|
[464] | 2413 | word32 buffer[4];
|
---|
[457] | 2414 |
|
---|
| 2415 | while (sz > 0) {
|
---|
[464] | 2416 | word32 len = sizeof(buffer);
|
---|
| 2417 |
|
---|
[457] | 2418 | if (sz < len) {
|
---|
| 2419 | len = sz;
|
---|
| 2420 | }
|
---|
| 2421 | /* return 4 words random number*/
|
---|
| 2422 | ret = R_TSIP_GenerateRandomNumber(buffer);
|
---|
| 2423 | if(ret == TSIP_SUCCESS) {
|
---|
| 2424 | XMEMCPY(output, &buffer, len);
|
---|
| 2425 | output += len;
|
---|
| 2426 | sz -= len;
|
---|
| 2427 | } else
|
---|
| 2428 | return ret;
|
---|
| 2429 | }
|
---|
| 2430 | return ret;
|
---|
| 2431 | }
|
---|
| 2432 |
|
---|
| 2433 | #elif defined(WOLFSSL_SCE) && !defined(WOLFSSL_SCE_NO_TRNG)
|
---|
| 2434 | #include "hal_data.h"
|
---|
| 2435 |
|
---|
| 2436 | #ifndef WOLFSSL_SCE_TRNG_HANDLE
|
---|
| 2437 | #define WOLFSSL_SCE_TRNG_HANDLE g_sce_trng
|
---|
| 2438 | #endif
|
---|
| 2439 |
|
---|
| 2440 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2441 | {
|
---|
[464] | 2442 | word32 ret;
|
---|
| 2443 | word32 blocks;
|
---|
| 2444 | word32 len = sz;
|
---|
[457] | 2445 |
|
---|
| 2446 | ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->open(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl,
|
---|
| 2447 | WOLFSSL_SCE_TRNG_HANDLE.p_cfg);
|
---|
| 2448 | if (ret != SSP_SUCCESS && ret != SSP_ERR_CRYPTO_ALREADY_OPEN) {
|
---|
| 2449 | /* error opening TRNG driver */
|
---|
| 2450 | return -1;
|
---|
| 2451 | }
|
---|
| 2452 |
|
---|
[464] | 2453 | blocks = sz / sizeof(word32);
|
---|
[457] | 2454 | if (blocks > 0) {
|
---|
| 2455 | ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->read(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl,
|
---|
[464] | 2456 | (word32*)output, blocks);
|
---|
[457] | 2457 | if (ret != SSP_SUCCESS) {
|
---|
| 2458 | return -1;
|
---|
| 2459 | }
|
---|
| 2460 | }
|
---|
| 2461 |
|
---|
[464] | 2462 | len = len - (blocks * sizeof(word32));
|
---|
[457] | 2463 | if (len > 0) {
|
---|
[464] | 2464 | word32 tmp;
|
---|
[457] | 2465 |
|
---|
[464] | 2466 | if (len > sizeof(word32)) {
|
---|
[457] | 2467 | return -1;
|
---|
| 2468 | }
|
---|
| 2469 | ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->read(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl,
|
---|
[464] | 2470 | (word32*)tmp, 1);
|
---|
[457] | 2471 | if (ret != SSP_SUCCESS) {
|
---|
| 2472 | return -1;
|
---|
| 2473 | }
|
---|
[464] | 2474 | XMEMCPY(output + (blocks * sizeof(word32)), (byte*)&tmp, len);
|
---|
[457] | 2475 | }
|
---|
| 2476 |
|
---|
| 2477 | ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->close(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl);
|
---|
| 2478 | if (ret != SSP_SUCCESS) {
|
---|
| 2479 | /* error opening TRNG driver */
|
---|
| 2480 | return -1;
|
---|
| 2481 | }
|
---|
| 2482 | return 0;
|
---|
| 2483 | }
|
---|
| 2484 | #elif defined(CUSTOM_RAND_GENERATE_BLOCK)
|
---|
| 2485 | /* #define CUSTOM_RAND_GENERATE_BLOCK myRngFunc
|
---|
| 2486 | * extern int myRngFunc(byte* output, word32 sz);
|
---|
| 2487 | */
|
---|
| 2488 |
|
---|
| 2489 | #elif defined(WOLFSSL_SAFERTOS) || defined(WOLFSSL_LEANPSK) || \
|
---|
| 2490 | defined(WOLFSSL_IAR_ARM) || defined(WOLFSSL_MDK_ARM) || \
|
---|
| 2491 | defined(WOLFSSL_uITRON4) || defined(WOLFSSL_uTKERNEL2) || \
|
---|
| 2492 | defined(WOLFSSL_LPC43xx) || defined(WOLFSSL_STM32F2xx) || \
|
---|
| 2493 | defined(MBED) || defined(WOLFSSL_EMBOS) || \
|
---|
| 2494 | defined(WOLFSSL_GENSEED_FORTEST) || defined(WOLFSSL_CHIBIOS) || \
|
---|
| 2495 | defined(WOLFSSL_CONTIKI) || defined(WOLFSSL_AZSPHERE)
|
---|
| 2496 |
|
---|
| 2497 | /* these platforms do not have a default random seed and
|
---|
| 2498 | you'll need to implement your own wc_GenerateSeed or define via
|
---|
| 2499 | CUSTOM_RAND_GENERATE_BLOCK */
|
---|
| 2500 |
|
---|
| 2501 | #define USE_TEST_GENSEED
|
---|
| 2502 |
|
---|
| 2503 | #elif defined(WOLFSSL_ZEPHYR)
|
---|
| 2504 |
|
---|
| 2505 | #include <entropy.h>
|
---|
| 2506 | #ifndef _POSIX_C_SOURCE
|
---|
| 2507 | #include <posix/time.h>
|
---|
| 2508 | #else
|
---|
| 2509 | #include <sys/time.h>
|
---|
| 2510 | #endif
|
---|
| 2511 |
|
---|
| 2512 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2513 | {
|
---|
| 2514 | int ret = 0;
|
---|
| 2515 | word32 rand;
|
---|
| 2516 | while (sz > 0) {
|
---|
| 2517 | word32 len = sizeof(rand);
|
---|
| 2518 | if (sz < len)
|
---|
| 2519 | len = sz;
|
---|
| 2520 | rand = sys_rand32_get();
|
---|
| 2521 | XMEMCPY(output, &rand, len);
|
---|
| 2522 | output += len;
|
---|
| 2523 | sz -= len;
|
---|
| 2524 | }
|
---|
| 2525 |
|
---|
| 2526 | return ret;
|
---|
| 2527 | }
|
---|
| 2528 |
|
---|
| 2529 | #elif defined(WOLFSSL_TELIT_M2MB)
|
---|
| 2530 |
|
---|
| 2531 | #include "stdlib.h"
|
---|
| 2532 | static long get_timestamp(void) {
|
---|
| 2533 | long myTime = 0;
|
---|
| 2534 | INT32 fd = m2mb_rtc_open("/dev/rtc0", 0);
|
---|
| 2535 | if (fd >= 0) {
|
---|
| 2536 | M2MB_RTC_TIMEVAL_T timeval;
|
---|
| 2537 | m2mb_rtc_ioctl(fd, M2MB_RTC_IOCTL_GET_TIMEVAL, &timeval);
|
---|
| 2538 | myTime = timeval.msec;
|
---|
| 2539 | m2mb_rtc_close(fd);
|
---|
| 2540 | }
|
---|
| 2541 | return myTime;
|
---|
| 2542 | }
|
---|
| 2543 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2544 | {
|
---|
| 2545 | int i;
|
---|
| 2546 | srand(get_timestamp());
|
---|
| 2547 | for (i = 0; i < sz; i++ ) {
|
---|
| 2548 | output[i] = rand() % 256;
|
---|
| 2549 | if ((i % 8) == 7) {
|
---|
| 2550 | srand(get_timestamp());
|
---|
| 2551 | }
|
---|
| 2552 | }
|
---|
| 2553 | return 0;
|
---|
| 2554 | }
|
---|
| 2555 |
|
---|
| 2556 | #elif defined(NO_DEV_RANDOM)
|
---|
| 2557 |
|
---|
| 2558 | #error "you need to write an os specific wc_GenerateSeed() here"
|
---|
| 2559 |
|
---|
| 2560 | /*
|
---|
| 2561 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2562 | {
|
---|
| 2563 | return 0;
|
---|
| 2564 | }
|
---|
| 2565 | */
|
---|
| 2566 |
|
---|
| 2567 | #else
|
---|
| 2568 |
|
---|
| 2569 | /* may block */
|
---|
| 2570 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2571 | {
|
---|
| 2572 | int ret = 0;
|
---|
| 2573 |
|
---|
| 2574 | if (os == NULL) {
|
---|
| 2575 | return BAD_FUNC_ARG;
|
---|
| 2576 | }
|
---|
| 2577 |
|
---|
| 2578 | #ifdef WOLF_CRYPTO_CB
|
---|
| 2579 | if (os->devId != INVALID_DEVID) {
|
---|
| 2580 | ret = wc_CryptoCb_RandomSeed(os, output, sz);
|
---|
| 2581 | if (ret != CRYPTOCB_UNAVAILABLE)
|
---|
| 2582 | return ret;
|
---|
| 2583 | /* fall-through when unavailable */
|
---|
| 2584 | ret = 0; /* reset error code */
|
---|
| 2585 | }
|
---|
| 2586 | #endif
|
---|
| 2587 |
|
---|
| 2588 | #ifdef HAVE_INTEL_RDSEED
|
---|
| 2589 | if (IS_INTEL_RDSEED(intel_flags)) {
|
---|
| 2590 | ret = wc_GenerateSeed_IntelRD(NULL, output, sz);
|
---|
| 2591 | if (ret == 0) {
|
---|
| 2592 | /* success, we're done */
|
---|
| 2593 | return ret;
|
---|
| 2594 | }
|
---|
| 2595 | #ifdef FORCE_FAILURE_RDSEED
|
---|
| 2596 | /* don't fallback to /dev/urandom */
|
---|
| 2597 | return ret;
|
---|
| 2598 | #else
|
---|
| 2599 | /* reset error and fallback to using /dev/urandom */
|
---|
| 2600 | ret = 0;
|
---|
| 2601 | #endif
|
---|
| 2602 | }
|
---|
| 2603 | #endif /* HAVE_INTEL_RDSEED */
|
---|
| 2604 |
|
---|
| 2605 | #ifndef NO_DEV_URANDOM /* way to disable use of /dev/urandom */
|
---|
| 2606 | os->fd = open("/dev/urandom", O_RDONLY);
|
---|
| 2607 | if (os->fd == -1)
|
---|
| 2608 | #endif
|
---|
| 2609 | {
|
---|
| 2610 | /* may still have /dev/random */
|
---|
| 2611 | os->fd = open("/dev/random", O_RDONLY);
|
---|
| 2612 | if (os->fd == -1)
|
---|
| 2613 | return OPEN_RAN_E;
|
---|
| 2614 | }
|
---|
| 2615 |
|
---|
| 2616 | while (sz) {
|
---|
| 2617 | int len = (int)read(os->fd, output, sz);
|
---|
| 2618 | if (len == -1) {
|
---|
| 2619 | ret = READ_RAN_E;
|
---|
| 2620 | break;
|
---|
| 2621 | }
|
---|
| 2622 |
|
---|
| 2623 | sz -= len;
|
---|
| 2624 | output += len;
|
---|
| 2625 |
|
---|
| 2626 | if (sz) {
|
---|
| 2627 | #if defined(BLOCKING) || defined(WC_RNG_BLOCKING)
|
---|
| 2628 | sleep(0); /* context switch */
|
---|
| 2629 | #else
|
---|
| 2630 | ret = RAN_BLOCK_E;
|
---|
| 2631 | break;
|
---|
| 2632 | #endif
|
---|
| 2633 | }
|
---|
| 2634 | }
|
---|
| 2635 | close(os->fd);
|
---|
| 2636 |
|
---|
| 2637 | return ret;
|
---|
| 2638 | }
|
---|
| 2639 |
|
---|
| 2640 | #endif
|
---|
| 2641 |
|
---|
| 2642 | #ifdef USE_TEST_GENSEED
|
---|
| 2643 | #ifndef _MSC_VER
|
---|
| 2644 | #warning "write a real random seed!!!!, just for testing now"
|
---|
| 2645 | #else
|
---|
| 2646 | #pragma message("Warning: write a real random seed!!!!, just for testing now")
|
---|
| 2647 | #endif
|
---|
| 2648 | int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
|
---|
| 2649 | {
|
---|
| 2650 | word32 i;
|
---|
| 2651 | for (i = 0; i < sz; i++ )
|
---|
| 2652 | output[i] = i;
|
---|
| 2653 |
|
---|
| 2654 | (void)os;
|
---|
| 2655 |
|
---|
| 2656 | return 0;
|
---|
| 2657 | }
|
---|
| 2658 | #endif
|
---|
| 2659 |
|
---|
| 2660 |
|
---|
| 2661 | /* End wc_GenerateSeed */
|
---|
| 2662 | #endif /* WC_NO_RNG */
|
---|
| 2663 | #endif /* HAVE_FIPS */
|
---|