1 | /* random.h
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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 |
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23 | #ifndef WOLF_CRYPT_RANDOM_H
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24 | #define WOLF_CRYPT_RANDOM_H
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25 |
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26 | #include <wolfssl/wolfcrypt/types.h>
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27 |
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28 | #ifdef HAVE_FIPS
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29 | /* for fips @wc_fips */
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30 | #include <cyassl/ctaocrypt/random.h>
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31 | #endif
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32 |
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33 | #ifdef __cplusplus
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34 | extern "C" {
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35 | #endif
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36 |
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37 | #ifndef HAVE_FIPS /* avoid redefining structs and macros */
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38 | #if defined(WOLFSSL_FORCE_RC4_DRBG) && defined(NO_RC4)
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39 | #error Cannot have WOLFSSL_FORCE_RC4_DRBG and NO_RC4 defined.
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40 | #endif /* WOLFSSL_FORCE_RC4_DRBG && NO_RC4 */
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41 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
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42 | #ifdef NO_SHA256
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43 | #error "Hash DRBG requires SHA-256."
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44 | #endif /* NO_SHA256 */
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45 |
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46 | #include <wolfssl/wolfcrypt/sha256.h>
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47 | #else /* HAVE_HASHDRBG || NO_RC4 */
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48 | #include <wolfssl/wolfcrypt/arc4.h>
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49 | #endif /* HAVE_HASHDRBG || NO_RC4 */
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50 |
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51 | #if defined(USE_WINDOWS_API)
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52 | #if defined(_WIN64)
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53 | typedef unsigned __int64 ProviderHandle;
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54 | /* type HCRYPTPROV, avoid #include <windows.h> */
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55 | #else
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56 | typedef unsigned long ProviderHandle;
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57 | #endif
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58 | #endif
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59 |
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60 |
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61 | /* OS specific seeder */
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62 | typedef struct OS_Seed {
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63 | #if defined(USE_WINDOWS_API)
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64 | ProviderHandle handle;
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65 | #else
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66 | int fd;
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67 | #endif
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68 | } OS_Seed;
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69 |
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70 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
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71 |
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72 |
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73 | #define DRBG_SEED_LEN (440/8)
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74 |
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75 |
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76 | struct DRBG; /* Private DRBG state */
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77 |
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78 |
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79 | /* Hash-based Deterministic Random Bit Generator */
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80 | typedef struct WC_RNG {
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81 | struct DRBG* drbg;
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82 | OS_Seed seed;
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83 | byte status;
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84 | } WC_RNG;
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85 |
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86 |
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87 | #else /* HAVE_HASHDRBG || NO_RC4 */
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88 |
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89 |
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90 | #define WOLFSSL_RNG_CAVIUM_MAGIC 0xBEEF0004
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91 |
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92 | /* secure Random Number Generator */
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93 |
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94 |
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95 | typedef struct WC_RNG {
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96 | OS_Seed seed;
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97 | Arc4 cipher;
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98 | #ifdef HAVE_CAVIUM
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99 | int devId; /* nitrox device id */
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100 | word32 magic; /* using cavium magic */
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101 | #endif
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102 | } WC_RNG;
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103 |
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104 |
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105 | #endif /* HAVE_HASH_DRBG || NO_RC4 */
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106 |
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107 | #endif /* HAVE_FIPS */
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108 |
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109 | /* NO_OLD_RNGNAME removes RNG struct name to prevent possible type conflicts,
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110 | * can't be used with CTaoCrypt FIPS */
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111 | #if !defined(NO_OLD_RNGNAME) && !defined(HAVE_FIPS)
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112 | #define RNG WC_RNG
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113 | #endif
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114 |
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115 | WOLFSSL_LOCAL
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116 | int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz);
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117 |
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118 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
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119 |
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120 | #ifdef HAVE_CAVIUM
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121 | WOLFSSL_API int wc_InitRngCavium(WC_RNG*, int);
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122 | #endif
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123 |
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124 | #endif /* HAVE_HASH_DRBG || NO_RC4 */
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125 |
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126 |
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127 | WOLFSSL_API int wc_InitRng(WC_RNG*);
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128 | WOLFSSL_API int wc_RNG_GenerateBlock(WC_RNG*, byte*, word32 sz);
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129 | WOLFSSL_API int wc_RNG_GenerateByte(WC_RNG*, byte*);
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130 | WOLFSSL_API int wc_FreeRng(WC_RNG*);
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131 |
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132 |
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133 | #if defined(HAVE_HASHDRBG) || defined(NO_RC4)
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134 | WOLFSSL_API int wc_RNG_HealthTest(int reseed,
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135 | const byte* entropyA, word32 entropyASz,
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136 | const byte* entropyB, word32 entropyBSz,
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137 | byte* output, word32 outputSz);
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138 | #endif /* HAVE_HASHDRBG || NO_RC4 */
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139 |
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140 | #ifdef __cplusplus
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141 | } /* extern "C" */
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142 | #endif
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143 |
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144 | #endif /* WOLF_CRYPT_RANDOM_H */
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145 |
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