sha512.h

   1 /*
   2  * Copyright (C) 2015 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 /* SHA512
  18  * Daniel Beer <dlbeer@gmail.com>, 22 Apr 2014
  19  *
  20  * This file is in the public domain.
  21  */
  22
  23 #ifndef SHA512_H_
  24 #define SHA512_H_
  25
  26 #include <sys/types.h>
  27 #include <stdint.h>
  28 #include <stddef.h>
  29 #include <string.h>
  30
  31 /* Feed a full block in */
  32 #define SHA512_BLOCK_SIZE       128
  33
  34 /* SHA512 state. State is updated as data is fed in, and then the final
  35  * hash can be read out in slices.
  36  *
  37  * Data is fed in as a sequence of full blocks terminated by a single
  38  * partial block.
  39  */
  40 struct sha512_state {
  41         uint64_t h[8];
  42         uint8_t partial[SHA512_BLOCK_SIZE];
  43         size_t len;
  44 };
  45
  46 /* Set up a new context */
  47 void sha512_init(struct sha512_state *s);
  48
  49 void sha512_add(struct sha512_state *s, const void *data, size_t len);
  50
  51 /* Fetch a slice of the hash result. */
  52 #define SHA512_HASH_SIZE        64
  53
  54 void sha512_final(struct sha512_state *s, uint8_t *hash);
  55
  56 static inline void *
  57 sha512_final_get(struct sha512_state *s)
  58 {
  59         sha512_final(s, s->partial);
  60         return s->partial;
  61 }
  62
  63 #endif