lcx_poly1305.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 LCX_POLY1305_H
#define LCX_POLY1305_H
 
#if defined(HAVE_POLY1305)
 
#include "ox.h"
#include <stddef.h>
 
typedef struct {
    uint32_t r[4];       
    uint32_t s[4];       
    uint32_t acc[5];     
    uint8_t  block[16];  
    size_t   block_len;  
} cx_poly1305_context_t;
 
void cx_poly1305_init(cx_poly1305_context_t *ctx);
 
void cx_poly1305_set_key(cx_poly1305_context_t *ctx, const uint8_t *key);
 
WARN_UNUSED_RESULT cx_err_t cx_poly1305_update(cx_poly1305_context_t *ctx,
                                               const uint8_t         *input,
                                               size_t                 in_len);
 
WARN_UNUSED_RESULT cx_err_t cx_poly1305_finish(cx_poly1305_context_t *ctx, uint8_t *tag);
 
WARN_UNUSED_RESULT cx_err_t cx_poly1305_mac(const uint8_t *key,
                                            const uint8_t *input,
                                            size_t         in_len,
                                            uint8_t       *tag);
 
#endif  // HAVE_POLY1305
 
#endif  // LCX_POLY1305_H