158 lines
5.3 KiB
C
158 lines
5.3 KiB
C
/**
|
|
* \file aesni.h
|
|
*
|
|
* \brief AES-NI for hardware AES acceleration on some Intel processors
|
|
*
|
|
* \warning These functions are only for internal use by other library
|
|
* functions; you must not call them directly.
|
|
*/
|
|
/*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
|
|
*/
|
|
#ifndef MBEDTLS_AESNI_H
|
|
#define MBEDTLS_AESNI_H
|
|
|
|
#include "mbedtls/build_info.h"
|
|
|
|
#include "mbedtls/aes.h"
|
|
|
|
#define MBEDTLS_AESNI_AES 0x02000000u
|
|
#define MBEDTLS_AESNI_CLMUL 0x00000002u
|
|
|
|
#if defined(MBEDTLS_AESNI_C) && \
|
|
(defined(MBEDTLS_ARCH_IS_X64) || defined(MBEDTLS_ARCH_IS_X86))
|
|
|
|
/* Can we do AESNI with intrinsics?
|
|
* (Only implemented with certain compilers, only for certain targets.)
|
|
*/
|
|
#undef MBEDTLS_AESNI_HAVE_INTRINSICS
|
|
#if defined(_MSC_VER)
|
|
/* Visual Studio supports AESNI intrinsics since VS 2008 SP1. We only support
|
|
* VS 2013 and up for other reasons anyway, so no need to check the version. */
|
|
#define MBEDTLS_AESNI_HAVE_INTRINSICS
|
|
#endif
|
|
/* GCC-like compilers: currently, we only support intrinsics if the requisite
|
|
* target flag is enabled when building the library (e.g. `gcc -mpclmul -msse2`
|
|
* or `clang -maes -mpclmul`). */
|
|
#if defined(__GNUC__) && defined(__AES__) && defined(__PCLMUL__)
|
|
#define MBEDTLS_AESNI_HAVE_INTRINSICS
|
|
#endif
|
|
|
|
/* Choose the implementation of AESNI, if one is available.
|
|
*
|
|
* Favor the intrinsics-based implementation if it's available, for better
|
|
* maintainability.
|
|
* Performance is about the same (see #7380).
|
|
* In the long run, we will likely remove the assembly implementation. */
|
|
#if defined(MBEDTLS_AESNI_HAVE_INTRINSICS)
|
|
#define MBEDTLS_AESNI_HAVE_CODE 2 // via intrinsics
|
|
#elif defined(MBEDTLS_HAVE_ASM) && \
|
|
defined(__GNUC__) && defined(MBEDTLS_ARCH_IS_X64)
|
|
/* Can we do AESNI with inline assembly?
|
|
* (Only implemented with gas syntax, only for 64-bit.)
|
|
*/
|
|
#define MBEDTLS_AESNI_HAVE_CODE 1 // via assembly
|
|
#elif defined(__GNUC__)
|
|
# error "Must use `-mpclmul -msse2 -maes` for MBEDTLS_AESNI_C"
|
|
#else
|
|
#error "MBEDTLS_AESNI_C defined, but neither intrinsics nor assembly available"
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_AESNI_HAVE_CODE)
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \brief Internal function to detect the AES-NI feature in CPUs.
|
|
*
|
|
* \note This function is only for internal use by other library
|
|
* functions; you must not call it directly.
|
|
*
|
|
* \param what The feature to detect
|
|
* (MBEDTLS_AESNI_AES or MBEDTLS_AESNI_CLMUL)
|
|
*
|
|
* \return 1 if CPU has support for the feature, 0 otherwise
|
|
*/
|
|
#if !defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
|
|
int mbedtls_aesni_has_support(unsigned int what);
|
|
#else
|
|
#define mbedtls_aesni_has_support(what) 1
|
|
#endif
|
|
|
|
/**
|
|
* \brief Internal AES-NI AES-ECB block encryption and decryption
|
|
*
|
|
* \note This function is only for internal use by other library
|
|
* functions; you must not call it directly.
|
|
*
|
|
* \param ctx AES context
|
|
* \param mode MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
|
|
* \param input 16-byte input block
|
|
* \param output 16-byte output block
|
|
*
|
|
* \return 0 on success (cannot fail)
|
|
*/
|
|
int mbedtls_aesni_crypt_ecb(mbedtls_aes_context *ctx,
|
|
int mode,
|
|
const unsigned char input[16],
|
|
unsigned char output[16]);
|
|
|
|
/**
|
|
* \brief Internal GCM multiplication: c = a * b in GF(2^128)
|
|
*
|
|
* \note This function is only for internal use by other library
|
|
* functions; you must not call it directly.
|
|
*
|
|
* \param c Result
|
|
* \param a First operand
|
|
* \param b Second operand
|
|
*
|
|
* \note Both operands and result are bit strings interpreted as
|
|
* elements of GF(2^128) as per the GCM spec.
|
|
*/
|
|
void mbedtls_aesni_gcm_mult(unsigned char c[16],
|
|
const unsigned char a[16],
|
|
const unsigned char b[16]);
|
|
|
|
/**
|
|
* \brief Internal round key inversion. This function computes
|
|
* decryption round keys from the encryption round keys.
|
|
*
|
|
* \note This function is only for internal use by other library
|
|
* functions; you must not call it directly.
|
|
*
|
|
* \param invkey Round keys for the equivalent inverse cipher
|
|
* \param fwdkey Original round keys (for encryption)
|
|
* \param nr Number of rounds (that is, number of round keys minus one)
|
|
*/
|
|
void mbedtls_aesni_inverse_key(unsigned char *invkey,
|
|
const unsigned char *fwdkey,
|
|
int nr);
|
|
|
|
/**
|
|
* \brief Internal key expansion for encryption
|
|
*
|
|
* \note This function is only for internal use by other library
|
|
* functions; you must not call it directly.
|
|
*
|
|
* \param rk Destination buffer where the round keys are written
|
|
* \param key Encryption key
|
|
* \param bits Key size in bits (must be 128, 192 or 256)
|
|
*
|
|
* \return 0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
|
|
*/
|
|
int mbedtls_aesni_setkey_enc(unsigned char *rk,
|
|
const unsigned char *key,
|
|
size_t bits);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* MBEDTLS_AESNI_HAVE_CODE */
|
|
#endif /* MBEDTLS_AESNI_C */
|
|
|
|
#endif /* MBEDTLS_AESNI_H */
|