[352] | 1 | /* aes.h
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| 2 | *
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| 3 | * Copyright (C) 2006-2017 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL.
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| 6 | *
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| 7 | * wolfSSL is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * wolfSSL is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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| 20 | */
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| 21 |
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| 22 |
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| 23 | #ifndef WOLF_CRYPT_AES_H
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| 24 | #define WOLF_CRYPT_AES_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 | #ifndef NO_AES
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| 29 |
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| 30 | /* included for fips @wc_fips */
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| 31 | #ifdef HAVE_FIPS
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| 32 | #include <cyassl/ctaocrypt/aes.h>
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| 33 | #if defined(CYASSL_AES_COUNTER) && !defined(WOLFSSL_AES_COUNTER)
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| 34 | #define WOLFSSL_AES_COUNTER
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| 35 | #endif
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| 36 | #if !defined(WOLFSSL_AES_DIRECT) && defined(CYASSL_AES_DIRECT)
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| 37 | #define WOLFSSL_AES_DIRECT
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| 38 | #endif
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| 39 | #endif
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| 40 |
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| 41 | #ifndef HAVE_FIPS /* to avoid redefinition of macros */
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| 42 |
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| 43 | #ifdef WOLFSSL_AESNI
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| 44 |
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| 45 | #include <wmmintrin.h>
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| 46 | #include <emmintrin.h>
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| 47 | #include <smmintrin.h>
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| 48 |
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| 49 | #endif /* WOLFSSL_AESNI */
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| 50 |
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| 51 | #ifdef WOLFSSL_XILINX_CRYPT
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| 52 | #include "xsecure_aes.h"
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| 53 | #endif
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| 54 |
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| 55 | #endif /* HAVE_FIPS */
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| 56 |
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| 57 | #ifdef __cplusplus
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| 58 | extern "C" {
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| 59 | #endif
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| 60 |
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| 61 | #ifndef HAVE_FIPS /* to avoid redefinition of structures */
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| 62 |
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| 63 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 64 | #include <wolfssl/wolfcrypt/async.h>
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| 65 | #endif
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| 66 |
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| 67 | enum {
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| 68 | AES_ENC_TYPE = 1, /* cipher unique type */
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| 69 | AES_ENCRYPTION = 0,
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| 70 | AES_DECRYPTION = 1,
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| 71 | KEYWRAP_BLOCK_SIZE = 8,
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| 72 | AES_BLOCK_SIZE = 16
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| 73 | };
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| 74 |
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| 75 |
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| 76 | typedef struct Aes {
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| 77 | /* AESNI needs key first, rounds 2nd, not sure why yet */
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| 78 | ALIGN16 word32 key[60];
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| 79 | word32 rounds;
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| 80 | int keylen;
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| 81 |
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| 82 | ALIGN16 word32 reg[AES_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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| 83 | ALIGN16 word32 tmp[AES_BLOCK_SIZE / sizeof(word32)]; /* same */
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| 84 |
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| 85 | #ifdef HAVE_AESGCM
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| 86 | ALIGN16 byte H[AES_BLOCK_SIZE];
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| 87 | #ifdef GCM_TABLE
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| 88 | /* key-based fast multiplication table. */
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| 89 | ALIGN16 byte M0[256][AES_BLOCK_SIZE];
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| 90 | #endif /* GCM_TABLE */
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| 91 | #endif /* HAVE_AESGCM */
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| 92 | #ifdef WOLFSSL_AESNI
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| 93 | byte use_aesni;
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| 94 | #endif /* WOLFSSL_AESNI */
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| 95 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 96 | word32 asyncKey[AES_MAX_KEY_SIZE/8/sizeof(word32)]; /* raw key */
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| 97 | word32 asyncIv[AES_BLOCK_SIZE/sizeof(word32)]; /* raw IV */
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| 98 | WC_ASYNC_DEV asyncDev;
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| 99 | #endif /* WOLFSSL_ASYNC_CRYPT */
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| 100 | #ifdef WOLFSSL_AES_COUNTER
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| 101 | word32 left; /* unused bytes left from last call */
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| 102 | #endif
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| 103 | #ifdef WOLFSSL_XILINX_CRYPT
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| 104 | XSecure_Aes xilAes;
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| 105 | XCsuDma dma;
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| 106 | word32 key_init[8];
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| 107 | word32 kup;
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| 108 | #endif
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| 109 | void* heap; /* memory hint to use */
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| 110 | } Aes;
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| 111 |
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| 112 | #ifdef WOLFSSL_AES_XTS
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| 113 | typedef struct XtsAes {
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| 114 | Aes aes;
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| 115 | Aes tweak;
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| 116 | } XtsAes;
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| 117 | #endif
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| 118 |
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| 119 | #ifdef HAVE_AESGCM
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| 120 | typedef struct Gmac {
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| 121 | Aes aes;
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| 122 | } Gmac;
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| 123 | #endif /* HAVE_AESGCM */
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| 124 | #endif /* HAVE_FIPS */
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| 125 |
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| 126 |
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| 127 | /* Authenticate cipher function prototypes */
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| 128 | typedef int (*wc_AesAuthEncryptFunc)(Aes* aes, byte* out,
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| 129 | const byte* in, word32 sz,
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| 130 | const byte* iv, word32 ivSz,
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| 131 | byte* authTag, word32 authTagSz,
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| 132 | const byte* authIn, word32 authInSz);
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| 133 | typedef int (*wc_AesAuthDecryptFunc)(Aes* aes, byte* out,
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| 134 | const byte* in, word32 sz,
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| 135 | const byte* iv, word32 ivSz,
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| 136 | const byte* authTag, word32 authTagSz,
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| 137 | const byte* authIn, word32 authInSz);
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| 138 |
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| 139 | /* AES-CBC */
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| 140 | WOLFSSL_API int wc_AesSetKey(Aes* aes, const byte* key, word32 len,
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| 141 | const byte* iv, int dir);
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| 142 | WOLFSSL_API int wc_AesSetIV(Aes* aes, const byte* iv);
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| 143 | WOLFSSL_API int wc_AesCbcEncrypt(Aes* aes, byte* out,
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| 144 | const byte* in, word32 sz);
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| 145 | WOLFSSL_API int wc_AesCbcDecrypt(Aes* aes, byte* out,
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| 146 | const byte* in, word32 sz);
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| 147 |
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| 148 | #ifdef HAVE_AES_ECB
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| 149 | WOLFSSL_API int wc_AesEcbEncrypt(Aes* aes, byte* out,
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| 150 | const byte* in, word32 sz);
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| 151 | WOLFSSL_API int wc_AesEcbDecrypt(Aes* aes, byte* out,
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| 152 | const byte* in, word32 sz);
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| 153 | #endif
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| 154 |
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| 155 | /* AES-CTR */
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| 156 | #ifdef WOLFSSL_AES_COUNTER
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| 157 | WOLFSSL_API int wc_AesCtrEncrypt(Aes* aes, byte* out,
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| 158 | const byte* in, word32 sz);
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| 159 | #endif
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| 160 | /* AES-DIRECT */
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| 161 | #if defined(WOLFSSL_AES_DIRECT)
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| 162 | WOLFSSL_API void wc_AesEncryptDirect(Aes* aes, byte* out, const byte* in);
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| 163 | WOLFSSL_API void wc_AesDecryptDirect(Aes* aes, byte* out, const byte* in);
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| 164 | WOLFSSL_API int wc_AesSetKeyDirect(Aes* aes, const byte* key, word32 len,
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| 165 | const byte* iv, int dir);
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| 166 | #endif
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| 167 | #ifdef HAVE_AESGCM
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| 168 | #ifdef WOLFSSL_XILINX_CRYPT
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| 169 | WOLFSSL_API int wc_AesGcmSetKey_ex(Aes* aes, const byte* key, word32 len,
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| 170 | word32 kup);
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| 171 | #endif
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| 172 | WOLFSSL_API int wc_AesGcmSetKey(Aes* aes, const byte* key, word32 len);
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| 173 | WOLFSSL_API int wc_AesGcmEncrypt(Aes* aes, byte* out,
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| 174 | const byte* in, word32 sz,
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| 175 | const byte* iv, word32 ivSz,
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| 176 | byte* authTag, word32 authTagSz,
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| 177 | const byte* authIn, word32 authInSz);
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| 178 | WOLFSSL_API int wc_AesGcmDecrypt(Aes* aes, byte* out,
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| 179 | const byte* in, word32 sz,
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| 180 | const byte* iv, word32 ivSz,
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| 181 | const byte* authTag, word32 authTagSz,
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| 182 | const byte* authIn, word32 authInSz);
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| 183 |
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| 184 | WOLFSSL_API int wc_GmacSetKey(Gmac* gmac, const byte* key, word32 len);
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| 185 | WOLFSSL_API int wc_GmacUpdate(Gmac* gmac, const byte* iv, word32 ivSz,
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| 186 | const byte* authIn, word32 authInSz,
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| 187 | byte* authTag, word32 authTagSz);
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| 188 | WOLFSSL_LOCAL void GHASH(Aes* aes, const byte* a, word32 aSz, const byte* c,
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| 189 | word32 cSz, byte* s, word32 sSz);
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| 190 | #endif /* HAVE_AESGCM */
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| 191 | #ifdef HAVE_AESCCM
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| 192 | WOLFSSL_API int wc_AesCcmSetKey(Aes* aes, const byte* key, word32 keySz);
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| 193 | WOLFSSL_API int wc_AesCcmEncrypt(Aes* aes, byte* out,
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| 194 | const byte* in, word32 inSz,
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| 195 | const byte* nonce, word32 nonceSz,
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| 196 | byte* authTag, word32 authTagSz,
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| 197 | const byte* authIn, word32 authInSz);
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| 198 | WOLFSSL_API int wc_AesCcmDecrypt(Aes* aes, byte* out,
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| 199 | const byte* in, word32 inSz,
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| 200 | const byte* nonce, word32 nonceSz,
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| 201 | const byte* authTag, word32 authTagSz,
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| 202 | const byte* authIn, word32 authInSz);
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| 203 | #endif /* HAVE_AESCCM */
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| 204 | #ifdef HAVE_AES_KEYWRAP
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| 205 | WOLFSSL_API int wc_AesKeyWrap(const byte* key, word32 keySz,
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| 206 | const byte* in, word32 inSz,
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| 207 | byte* out, word32 outSz,
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| 208 | const byte* iv);
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| 209 | WOLFSSL_API int wc_AesKeyUnWrap(const byte* key, word32 keySz,
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| 210 | const byte* in, word32 inSz,
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| 211 | byte* out, word32 outSz,
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| 212 | const byte* iv);
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| 213 | #endif /* HAVE_AES_KEYWRAP */
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| 214 |
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| 215 | #ifdef WOLFSSL_AES_XTS
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| 216 | /*!
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| 217 | \ingroup AES
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| 218 |
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| 219 | \brief This is to help with setting keys to correct encrypt or decrypt type.
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| 220 |
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| 221 | \note Is up to user to call wc_AesXtsFree on aes key when done.
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| 222 |
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| 223 | \return 0 Success
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| 224 |
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| 225 | \param aes AES keys for encrypt/decrypt process
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| 226 | \param key buffer holding aes key | tweak key
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| 227 | \param len length of key buffer in bytes. Should be twice that of key size.
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| 228 | i.e. 32 for a 16 byte key.
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| 229 | \param dir direction, either AES_ENCRYPTION or AES_DECRYPTION
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| 230 | \param heap heap hint to use for memory. Can be NULL
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| 231 | \param devId id to use with async crypto. Can be 0
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| 232 |
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| 233 | _Example_
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| 234 | \code
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| 235 | XtsAes aes;
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| 236 |
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| 237 | if(wc_AesXtsSetKey(&aes, key, sizeof(key), AES_ENCRYPTION, NULL, 0) != 0)
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| 238 | {
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| 239 | // Handle error
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| 240 | }
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| 241 | wc_AesXtsFree(&aes);
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| 242 | \endcode
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| 243 |
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| 244 | \sa wc_AesXtsEncrypt
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| 245 | \sa wc_AesXtsDecrypt
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| 246 | \sa wc_AesXtsFree
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| 247 | */
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| 248 | WOLFSSL_API int wc_AesXtsSetKey(XtsAes* aes, const byte* key,
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| 249 | word32 len, int dir, void* heap, int devId);
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| 250 |
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| 251 |
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| 252 | /*!
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| 253 | \ingroup AES
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| 254 |
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| 255 | \brief Same process as wc_AesXtsEncrypt but uses a word64 type as the tweak
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| 256 | value instead of a byte array. This just converts the word64 to a
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| 257 | byte array and calls wc_AesXtsEncrypt.
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| 258 |
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| 259 | \return 0 Success
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| 260 |
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| 261 | \param aes AES keys to use for block encrypt/decrypt
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| 262 | \param out output buffer to hold cipher text
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| 263 | \param in input plain text buffer to encrypt
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| 264 | \param sz size of both out and in buffers
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| 265 | \param sector value to use for tweak
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| 266 |
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| 267 | _Example_
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| 268 | \code
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| 269 | XtsAes aes;
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| 270 | unsigned char plain[SIZE];
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| 271 | unsigned char cipher[SIZE];
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| 272 | word64 s = VALUE;
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| 273 |
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| 274 | //set up keys with AES_ENCRYPTION as dir
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| 275 |
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| 276 | if(wc_AesXtsEncryptSector(&aes, cipher, plain, SIZE, s) != 0)
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| 277 | {
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| 278 | // Handle error
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| 279 | }
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| 280 | wc_AesXtsFree(&aes);
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| 281 | \endcode
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| 282 |
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| 283 | \sa wc_AesXtsEncrypt
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| 284 | \sa wc_AesXtsDecrypt
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| 285 | \sa wc_AesXtsSetKey
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| 286 | \sa wc_AesXtsFree
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| 287 | */
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| 288 | WOLFSSL_API int wc_AesXtsEncryptSector(XtsAes* aes, byte* out,
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| 289 | const byte* in, word32 sz, word64 sector);
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| 290 |
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| 291 |
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| 292 | /*!
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| 293 | \ingroup AES
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| 294 |
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| 295 | \brief Same process as wc_AesXtsDecrypt but uses a word64 type as the tweak
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| 296 | value instead of a byte array. This just converts the word64 to a
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| 297 | byte array.
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| 298 |
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| 299 | \return 0 Success
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| 300 |
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| 301 | \param aes AES keys to use for block encrypt/decrypt
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| 302 | \param out output buffer to hold plain text
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| 303 | \param in input cipher text buffer to decrypt
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| 304 | \param sz size of both out and in buffers
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| 305 | \param sector value to use for tweak
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| 306 |
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| 307 | _Example_
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| 308 | \code
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| 309 | XtsAes aes;
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| 310 | unsigned char plain[SIZE];
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| 311 | unsigned char cipher[SIZE];
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| 312 | word64 s = VALUE;
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| 313 |
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| 314 | //set up aes key with AES_DECRYPTION as dir and tweak with AES_ENCRYPTION
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| 315 |
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| 316 | if(wc_AesXtsDecryptSector(&aes, plain, cipher, SIZE, s) != 0)
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| 317 | {
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| 318 | // Handle error
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| 319 | }
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| 320 | wc_AesXtsFree(&aes);
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| 321 | \endcode
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| 322 |
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| 323 | \sa wc_AesXtsEncrypt
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| 324 | \sa wc_AesXtsDecrypt
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| 325 | \sa wc_AesXtsSetKey
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| 326 | \sa wc_AesXtsFree
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| 327 | */
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| 328 | WOLFSSL_API int wc_AesXtsDecryptSector(XtsAes* aes, byte* out,
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| 329 | const byte* in, word32 sz, word64 sector);
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| 330 |
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| 331 |
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| 332 | /*!
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| 333 | \ingroup AES
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| 334 |
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| 335 | \brief AES with XTS mode. (XTS) XEX encryption with Tweak and cipher text
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| 336 | Stealing.
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| 337 |
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| 338 | \return 0 Success
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| 339 |
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| 340 | \param aes AES keys to use for block encrypt/decrypt
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| 341 | \param out output buffer to hold cipher text
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| 342 | \param in input plain text buffer to encrypt
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| 343 | \param sz size of both out and in buffers
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| 344 | \param i value to use for tweak
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| 345 | \param iSz size of i buffer, should always be AES_BLOCK_SIZE but having
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| 346 | this input adds a sanity check on how the user calls the
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| 347 | function.
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| 348 |
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| 349 | _Example_
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| 350 | \code
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| 351 | XtsAes aes;
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| 352 | unsigned char plain[SIZE];
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| 353 | unsigned char cipher[SIZE];
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| 354 | unsigned char i[AES_BLOCK_SIZE];
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| 355 |
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| 356 | //set up key with AES_ENCRYPTION as dir
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| 357 |
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| 358 | if(wc_AesXtsEncrypt(&aes, cipher, plain, SIZE, i, sizeof(i)) != 0)
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| 359 | {
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| 360 | // Handle error
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| 361 | }
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| 362 | wc_AesXtsFree(&aes);
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| 363 | \endcode
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| 364 |
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| 365 | \sa wc_AesXtsDecrypt
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| 366 | \sa wc_AesXtsSetKey
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| 367 | \sa wc_AesXtsFree
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| 368 | */
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| 369 | WOLFSSL_API int wc_AesXtsEncrypt(XtsAes* aes, byte* out,
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| 370 | const byte* in, word32 sz, const byte* i, word32 iSz);
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| 371 |
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| 372 |
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| 373 | /*!
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| 374 | \ingroup AES
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| 375 |
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| 376 | \brief Same process as encryption but Aes key is AES_DECRYPTION type.
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| 377 |
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| 378 | \return 0 Success
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| 379 |
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| 380 | \param aes AES keys to use for block encrypt/decrypt
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| 381 | \param out output buffer to hold plain text
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| 382 | \param in input cipher text buffer to decrypt
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| 383 | \param sz size of both out and in buffers
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| 384 | \param i value to use for tweak
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| 385 | \param iSz size of i buffer, should always be AES_BLOCK_SIZE but having
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| 386 | this input adds a sanity check on how the user calls the
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| 387 | function.
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| 388 | _Example_
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| 389 | \code
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| 390 | XtsAes aes;
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| 391 | unsigned char plain[SIZE];
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| 392 | unsigned char cipher[SIZE];
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| 393 | unsigned char i[AES_BLOCK_SIZE];
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| 394 |
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| 395 | //set up key with AES_DECRYPTION as dir and tweak with AES_ENCRYPTION
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| 396 |
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| 397 | if(wc_AesXtsDecrypt(&aes, plain, cipher, SIZE, i, sizeof(i)) != 0)
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| 398 | {
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| 399 | // Handle error
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| 400 | }
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| 401 | wc_AesXtsFree(&aes);
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| 402 | \endcode
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| 403 |
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| 404 | \sa wc_AesXtsEncrypt
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| 405 | \sa wc_AesXtsSetKey
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| 406 | \sa wc_AesXtsFree
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| 407 | */
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| 408 | WOLFSSL_API int wc_AesXtsDecrypt(XtsAes* aes, byte* out,
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| 409 | const byte* in, word32 sz, const byte* i, word32 iSz);
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| 410 |
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| 411 |
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| 412 | /*!
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| 413 | \ingroup AES
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| 414 |
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| 415 | \brief This is to free up any resources used by the XtsAes structure
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| 416 |
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| 417 | \return 0 Success
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| 418 |
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| 419 | \param aes AES keys to free
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| 420 |
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| 421 | _Example_
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| 422 | \code
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| 423 | XtsAes aes;
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| 424 |
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| 425 | if(wc_AesXtsSetKey(&aes, key, sizeof(key), AES_ENCRYPTION, NULL, 0) != 0)
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| 426 | {
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| 427 | // Handle error
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| 428 | }
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| 429 | wc_AesXtsFree(&aes);
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| 430 | \endcode
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| 431 |
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| 432 | \sa wc_AesXtsEncrypt
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| 433 | \sa wc_AesXtsDecrypt
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| 434 | \sa wc_AesXtsSetKey
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| 435 | */
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| 436 | WOLFSSL_API int wc_AesXtsFree(XtsAes* aes);
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| 437 | #endif
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| 438 |
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| 439 | WOLFSSL_API int wc_AesGetKeySize(Aes* aes, word32* keySize);
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| 440 |
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| 441 | WOLFSSL_API int wc_AesInit(Aes*, void*, int);
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| 442 | WOLFSSL_API void wc_AesFree(Aes*);
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| 443 |
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| 444 | #ifdef __cplusplus
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| 445 | } /* extern "C" */
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| 446 | #endif
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| 447 |
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| 448 |
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| 449 | #endif /* NO_AES */
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| 450 | #endif /* WOLF_CRYPT_AES_H */
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