[398] | 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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