| /** |
| * \file aesce.h |
| * |
| * \brief Support hardware AES acceleration on Armv8-A processors with |
| * the Armv8-A Cryptographic Extension in AArch64 execution state. |
| * |
| * \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 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #ifndef MBEDTLS_AESCE_H |
| #define MBEDTLS_AESCE_H |
| |
| #include "mbedtls/build_info.h" |
| |
| #include "mbedtls/aes.h" |
| |
| |
| #if defined(MBEDTLS_HAVE_ASM) && defined(__GNUC__) && \ |
| defined(__aarch64__) && !defined(MBEDTLS_HAVE_ARM64) |
| #define MBEDTLS_HAVE_ARM64 |
| #endif |
| |
| #if defined(MBEDTLS_HAVE_ARM64) |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief Internal function to detect the crypto extension in CPUs. |
| * |
| * \return 1 if CPU has support for the feature, 0 otherwise |
| */ |
| int mbedtls_aesce_has_support(void); |
| |
| /** |
| * \brief Internal AES-ECB block encryption and decryption |
| * |
| * \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_aesce_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_aesce_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. |
| * |
| * \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_aesce_inverse_key(unsigned char *invkey, |
| const unsigned char *fwdkey, |
| int nr); |
| |
| /** |
| * \brief Internal key expansion for encryption |
| * |
| * \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_aesce_setkey_enc(unsigned char *rk, |
| const unsigned char *key, |
| size_t bits); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* MBEDTLS_HAVE_ARM64 */ |
| |
| #endif /* MBEDTLS_AESCE_H */ |