| /* |
| * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #ifndef OSSL_CRYPTO_POLY1305_H |
| # define OSSL_CRYPTO_POLY1305_H |
| # pragma once |
| |
| #include <stddef.h> |
| |
| #define POLY1305_BLOCK_SIZE 16 |
| #define POLY1305_DIGEST_SIZE 16 |
| #define POLY1305_KEY_SIZE 32 |
| |
| typedef struct poly1305_context POLY1305; |
| |
| typedef void (*poly1305_blocks_f) (void *ctx, const unsigned char *inp, |
| size_t len, unsigned int padbit); |
| typedef void (*poly1305_emit_f) (void *ctx, unsigned char mac[16], |
| const unsigned int nonce[4]); |
| |
| struct poly1305_context { |
| double opaque[24]; /* large enough to hold internal state, declared |
| * 'double' to ensure at least 64-bit invariant |
| * alignment across all platforms and |
| * configurations */ |
| unsigned int nonce[4]; |
| unsigned char data[POLY1305_BLOCK_SIZE]; |
| size_t num; |
| struct { |
| poly1305_blocks_f blocks; |
| poly1305_emit_f emit; |
| } func; |
| }; |
| |
| size_t Poly1305_ctx_size(void); |
| void Poly1305_Init(POLY1305 *ctx, const unsigned char key[32]); |
| void Poly1305_Update(POLY1305 *ctx, const unsigned char *inp, size_t len); |
| void Poly1305_Final(POLY1305 *ctx, unsigned char mac[16]); |
| |
| #endif /* OSSL_CRYPTO_POLY1305_H */ |