crypto/poly1305/poly1305_local.h

   1 /*
   2  * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 typedef void (*poly1305_blocks_f) (void *ctx, const unsigned char *inp,
  11                                    size_t len, unsigned int padbit);
  12 typedef void (*poly1305_emit_f) (void *ctx, unsigned char mac[16],
  13                                  const unsigned int nonce[4]);
  14
  15 struct poly1305_context {
  16     double opaque[24];  /* large enough to hold internal state, declared
  17                          * 'double' to ensure at least 64-bit invariant
  18                          * alignment across all platforms and
  19                          * configurations */
  20     unsigned int nonce[4];
  21     unsigned char data[POLY1305_BLOCK_SIZE];
  22     size_t num;
  23     struct {
  24         poly1305_blocks_f blocks;
  25         poly1305_emit_f emit;
  26     } func;
  27 };