1 | /* hmac.h
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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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22 | /*!
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23 | \file wolfssl/wolfcrypt/hmac.h
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24 | */
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25 |
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26 | #ifndef NO_HMAC
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27 |
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28 | #ifndef WOLF_CRYPT_HMAC_H
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29 | #define WOLF_CRYPT_HMAC_H
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30 |
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31 | #include <wolfssl/wolfcrypt/hash.h>
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32 |
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33 | #if defined(HAVE_FIPS) && \
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34 | (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
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35 | /* for fips @wc_fips */
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36 | #include <cyassl/ctaocrypt/hmac.h>
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37 | #define WC_HMAC_BLOCK_SIZE HMAC_BLOCK_SIZE
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38 | #endif
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39 |
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40 |
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41 | #if defined(HAVE_FIPS) && \
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42 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
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43 | #include <wolfssl/wolfcrypt/fips.h>
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44 | #endif
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45 |
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46 | #ifdef __cplusplus
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47 | extern "C" {
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48 | #endif
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49 |
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50 | /* avoid redefinition of structs */
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51 | #if !defined(HAVE_FIPS) || \
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52 | (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2))
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53 |
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54 | #ifdef WOLFSSL_ASYNC_CRYPT
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55 | #include <wolfssl/wolfcrypt/async.h>
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56 | #endif
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57 |
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58 | #ifndef NO_OLD_WC_NAMES
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59 | #define HMAC_BLOCK_SIZE WC_HMAC_BLOCK_SIZE
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60 | #endif
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61 |
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62 | #define WC_HMAC_INNER_HASH_KEYED_SW 1
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63 | #define WC_HMAC_INNER_HASH_KEYED_DEV 2
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64 |
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65 | enum {
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66 | HMAC_FIPS_MIN_KEY = 14, /* 112 bit key length minimum */
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67 |
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68 | IPAD = 0x36,
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69 | OPAD = 0x5C,
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70 |
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71 | /* If any hash is not enabled, add the ID here. */
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72 | #ifdef NO_MD5
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73 | WC_MD5 = WC_HASH_TYPE_MD5,
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74 | #endif
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75 | #ifdef NO_SHA
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76 | WC_SHA = WC_HASH_TYPE_SHA,
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77 | #endif
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78 | #ifdef NO_SHA256
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79 | WC_SHA256 = WC_HASH_TYPE_SHA256,
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80 | #endif
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81 | #ifndef WOLFSSL_SHA512
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82 | WC_SHA512 = WC_HASH_TYPE_SHA512,
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83 | #endif
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84 | #ifndef WOLFSSL_SHA384
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85 | WC_SHA384 = WC_HASH_TYPE_SHA384,
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86 | #endif
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87 | #ifndef WOLFSSL_SHA224
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88 | WC_SHA224 = WC_HASH_TYPE_SHA224,
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89 | #endif
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90 | #ifndef WOLFSSL_SHA3
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91 | WC_SHA3_224 = WC_HASH_TYPE_SHA3_224,
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92 | WC_SHA3_256 = WC_HASH_TYPE_SHA3_256,
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93 | WC_SHA3_384 = WC_HASH_TYPE_SHA3_384,
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94 | WC_SHA3_512 = WC_HASH_TYPE_SHA3_512,
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95 | #endif
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96 | #ifdef HAVE_PKCS11
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97 | HMAC_MAX_ID_LEN = 32,
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98 | #endif
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99 | };
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100 |
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101 | /* Select the largest available hash for the buffer size. */
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102 | #define WC_HMAC_BLOCK_SIZE WC_MAX_BLOCK_SIZE
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103 |
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104 | #if !defined(WOLFSSL_SHA3) && !defined(WOLFSSL_SHA512) && \
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105 | !defined(WOLFSSL_SHA384) && defined(NO_SHA256) && \
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106 | defined(WOLFSSL_SHA224) && defined(NO_SHA) && defined(NO_MD5)
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107 | #error "You have to have some kind of hash if you want to use HMAC."
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108 | #endif
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109 |
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110 |
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111 | /* hash union */
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112 | typedef union {
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113 | #ifndef NO_MD5
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114 | wc_Md5 md5;
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115 | #endif
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116 | #ifndef NO_SHA
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117 | wc_Sha sha;
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118 | #endif
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119 | #ifdef WOLFSSL_SHA224
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120 | wc_Sha224 sha224;
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121 | #endif
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122 | #ifndef NO_SHA256
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123 | wc_Sha256 sha256;
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124 | #endif
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125 | #ifdef WOLFSSL_SHA384
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126 | wc_Sha384 sha384;
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127 | #endif
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128 | #ifdef WOLFSSL_SHA512
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129 | wc_Sha512 sha512;
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130 | #endif
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131 | #ifdef WOLFSSL_SHA3
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132 | wc_Sha3 sha3;
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133 | #endif
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134 | } Hash;
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135 |
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136 | /* Hmac digest */
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137 | struct Hmac {
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138 | Hash hash;
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139 | word32 ipad[WC_HMAC_BLOCK_SIZE / sizeof(word32)]; /* same block size all*/
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140 | word32 opad[WC_HMAC_BLOCK_SIZE / sizeof(word32)];
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141 | word32 innerHash[WC_MAX_DIGEST_SIZE / sizeof(word32)];
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142 | void* heap; /* heap hint */
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143 | byte macType; /* md5 sha or sha256 */
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144 | byte innerHashKeyed; /* keyed flag */
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145 | #ifdef WOLFSSL_ASYNC_CRYPT
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146 | WC_ASYNC_DEV asyncDev;
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147 | #endif /* WOLFSSL_ASYNC_CRYPT */
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148 | #ifdef WOLF_CRYPTO_CB
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149 | int devId;
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150 | void* devCtx;
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151 | const byte* keyRaw;
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152 | #endif
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153 | #ifdef HAVE_PKCS11
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154 | byte id[HMAC_MAX_ID_LEN];
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155 | int idLen;
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156 | #endif
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157 | #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
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158 | word16 keyLen; /* hmac key length (key in ipad) */
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159 | #endif
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160 | };
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161 |
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162 | #ifndef WC_HMAC_TYPE_DEFINED
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163 | typedef struct Hmac Hmac;
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164 | #define WC_HMAC_TYPE_DEFINED
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165 | #endif
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166 |
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167 |
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168 | #endif /* HAVE_FIPS */
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169 |
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170 | /* does init */
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171 | WOLFSSL_API int wc_HmacSetKey(Hmac*, int type, const byte* key, word32 keySz);
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172 | WOLFSSL_API int wc_HmacUpdate(Hmac*, const byte*, word32);
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173 | WOLFSSL_API int wc_HmacFinal(Hmac*, byte*);
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174 | WOLFSSL_API int wc_HmacSizeByType(int type);
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175 |
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176 | WOLFSSL_API int wc_HmacInit(Hmac* hmac, void* heap, int devId);
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177 | WOLFSSL_API int wc_HmacInit_Id(Hmac* hmac, byte* id, int len, void* heap,
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178 | int devId);
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179 | WOLFSSL_API void wc_HmacFree(Hmac*);
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180 |
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181 | WOLFSSL_API int wolfSSL_GetHmacMaxSize(void);
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182 |
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183 | WOLFSSL_LOCAL int _InitHmac(Hmac* hmac, int type, void* heap);
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184 |
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185 | #ifdef HAVE_HKDF
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186 |
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187 | WOLFSSL_API int wc_HKDF_Extract(int type, const byte* salt, word32 saltSz,
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188 | const byte* inKey, word32 inKeySz, byte* out);
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189 | WOLFSSL_API int wc_HKDF_Expand(int type, const byte* inKey, word32 inKeySz,
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190 | const byte* info, word32 infoSz,
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191 | byte* out, word32 outSz);
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192 |
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193 | WOLFSSL_API int wc_HKDF(int type, const byte* inKey, word32 inKeySz,
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194 | const byte* salt, word32 saltSz,
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195 | const byte* info, word32 infoSz,
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196 | byte* out, word32 outSz);
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197 |
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198 | #endif /* HAVE_HKDF */
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199 |
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200 | #ifdef __cplusplus
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201 | } /* extern "C" */
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202 | #endif
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203 |
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204 | #endif /* WOLF_CRYPT_HMAC_H */
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205 |
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206 | #endif /* NO_HMAC */
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207 |
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