FreeBSD/Linux Kernel Cross Reference
sys/crypto/openssl/ossl_poly1305.h

     /*
      * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
      *
      * Licensed under the OpenSSL license (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
      */
     
    /* From include/crypto/poly1305.h */
    
    #define POLY1305_BLOCK_SIZE  16
    
    typedef struct poly1305_context POLY1305;
    
    /* From crypto/poly1305/poly1305_local.h */
    
    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;
    };
    
    int ossl_poly1305_update(void *vctx, const void *buf, u_int len);
    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]);

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