1 | /**
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2 | * \file aesni.h
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3 | *
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4 | * \brief AES-NI for hardware AES acceleration on some Intel processors
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5 | *
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6 | * \warning These functions are only for internal use by other library
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7 | * functions; you must not call them directly.
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8 | */
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9 | /*
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10 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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11 | * SPDX-License-Identifier: Apache-2.0
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12 | *
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13 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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14 | * not use this file except in compliance with the License.
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15 | * You may obtain a copy of the License at
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16 | *
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17 | * http://www.apache.org/licenses/LICENSE-2.0
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18 | *
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19 | * Unless required by applicable law or agreed to in writing, software
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20 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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21 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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22 | * See the License for the specific language governing permissions and
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23 | * limitations under the License.
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24 | *
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25 | * This file is part of mbed TLS (https://tls.mbed.org)
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26 | */
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27 | #ifndef MBEDTLS_AESNI_H
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28 | #define MBEDTLS_AESNI_H
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29 |
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30 | #if !defined(MBEDTLS_CONFIG_FILE)
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31 | #include "config.h"
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32 | #else
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33 | #include MBEDTLS_CONFIG_FILE
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34 | #endif
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35 |
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36 | #include "aes.h"
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37 |
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38 | #define MBEDTLS_AESNI_AES 0x02000000u
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39 | #define MBEDTLS_AESNI_CLMUL 0x00000002u
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40 |
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41 | #if defined(MBEDTLS_HAVE_ASM) && defined(__GNUC__) && \
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42 | ( defined(__amd64__) || defined(__x86_64__) ) && \
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43 | ! defined(MBEDTLS_HAVE_X86_64)
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44 | #define MBEDTLS_HAVE_X86_64
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45 | #endif
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46 |
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47 | #if defined(MBEDTLS_HAVE_X86_64)
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48 |
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49 | #ifdef __cplusplus
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50 | extern "C" {
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51 | #endif
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52 |
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53 | /**
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54 | * \brief Internal function to detect the AES-NI feature in CPUs.
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55 | *
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56 | * \note This function is only for internal use by other library
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57 | * functions; you must not call it directly.
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58 | *
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59 | * \param what The feature to detect
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60 | * (MBEDTLS_AESNI_AES or MBEDTLS_AESNI_CLMUL)
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61 | *
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62 | * \return 1 if CPU has support for the feature, 0 otherwise
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63 | */
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64 | int mbedtls_aesni_has_support( unsigned int what );
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65 |
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66 | /**
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67 | * \brief Internal AES-NI AES-ECB block encryption and decryption
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68 | *
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69 | * \note This function is only for internal use by other library
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70 | * functions; you must not call it directly.
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71 | *
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72 | * \param ctx AES context
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73 | * \param mode MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
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74 | * \param input 16-byte input block
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75 | * \param output 16-byte output block
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76 | *
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77 | * \return 0 on success (cannot fail)
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78 | */
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79 | int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
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80 | int mode,
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81 | const unsigned char input[16],
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82 | unsigned char output[16] );
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83 |
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84 | /**
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85 | * \brief Internal GCM multiplication: c = a * b in GF(2^128)
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86 | *
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87 | * \note This function is only for internal use by other library
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88 | * functions; you must not call it directly.
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89 | *
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90 | * \param c Result
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91 | * \param a First operand
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92 | * \param b Second operand
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93 | *
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94 | * \note Both operands and result are bit strings interpreted as
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95 | * elements of GF(2^128) as per the GCM spec.
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96 | */
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97 | void mbedtls_aesni_gcm_mult( unsigned char c[16],
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98 | const unsigned char a[16],
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99 | const unsigned char b[16] );
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100 |
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101 | /**
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102 | * \brief Internal round key inversion. This function computes
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103 | * decryption round keys from the encryption round keys.
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104 | *
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105 | * \note This function is only for internal use by other library
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106 | * functions; you must not call it directly.
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107 | *
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108 | * \param invkey Round keys for the equivalent inverse cipher
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109 | * \param fwdkey Original round keys (for encryption)
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110 | * \param nr Number of rounds (that is, number of round keys minus one)
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111 | */
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112 | void mbedtls_aesni_inverse_key( unsigned char *invkey,
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113 | const unsigned char *fwdkey,
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114 | int nr );
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115 |
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116 | /**
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117 | * \brief Internal key expansion for encryption
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118 | *
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119 | * \note This function is only for internal use by other library
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120 | * functions; you must not call it directly.
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121 | *
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122 | * \param rk Destination buffer where the round keys are written
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123 | * \param key Encryption key
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124 | * \param bits Key size in bits (must be 128, 192 or 256)
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125 | *
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126 | * \return 0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
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127 | */
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128 | int mbedtls_aesni_setkey_enc( unsigned char *rk,
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129 | const unsigned char *key,
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130 | size_t bits );
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131 |
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132 | #ifdef __cplusplus
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133 | }
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134 | #endif
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135 |
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136 | #endif /* MBEDTLS_HAVE_X86_64 */
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137 |
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138 | #endif /* MBEDTLS_AESNI_H */
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