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