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