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