cx_aes_gcm.h

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/*******************************************************************************
 *   Ledger Nano S - Secure firmware
 *   (c) 2022 Ledger
 *
 *  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 CX_AES_GCM_H
#define CX_AES_GCM_H
 
#if defined(HAVE_AEAD)
#include "lcx_aead.h"
#endif  // HAVE_AEAD
#include <stddef.h>
 
// Store unaligned 32-bit integer (big-endian encoding)
#define STORE32BE(a, p)                                                 \
    ((uint8_t *) (p))[0]              = ((uint32_t) (a) >> 24) & 0xFFU, \
                 ((uint8_t *) (p))[1] = ((uint32_t) (a) >> 16) & 0xFFU, \
                 ((uint8_t *) (p))[2] = ((uint32_t) (a) >> 8) & 0xFFU,  \
                 ((uint8_t *) (p))[3] = ((uint32_t) (a) >> 0) & 0xFFU
 
// Store unaligned 64-bit integer (big-endian encoding)
#define STORE64BE(a, p)                                                 \
    ((uint8_t *) (p))[0]              = ((uint64_t) (a) >> 56) & 0xFFU, \
                 ((uint8_t *) (p))[1] = ((uint64_t) (a) >> 48) & 0xFFU, \
                 ((uint8_t *) (p))[2] = ((uint64_t) (a) >> 40) & 0xFFU, \
                 ((uint8_t *) (p))[3] = ((uint64_t) (a) >> 32) & 0xFFU, \
                 ((uint8_t *) (p))[4] = ((uint64_t) (a) >> 24) & 0xFFU, \
                 ((uint8_t *) (p))[5] = ((uint64_t) (a) >> 16) & 0xFFU, \
                 ((uint8_t *) (p))[6] = ((uint64_t) (a) >> 8) & 0xFFU,  \
                 ((uint8_t *) (p))[7] = ((uint64_t) (a) >> 0) & 0xFFU
 
#if defined(HAVE_AEAD)
extern const cx_aead_info_t cx_aes128_gcm_info;
extern const cx_aead_info_t cx_aes192_gcm_info;
extern const cx_aead_info_t cx_aes256_gcm_info;
#endif  // HAVE_AEAD
 
#endif  // CX_AES_GCM_H