1  /*
 2   * FIPS 180-2 SHA-224/256/384/512 implementation
 3   * Last update: 02/02/2007
 4   * Issue date:  04/30/2005
 5   *
 6   * Copyright (C) 2013, Con Kolivas <kernel@kolivas.org>
 7   * Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
 8   * All rights reserved.
 9   *
10   * Redistribution and use in source and binary forms, with or without
11   * modification, are permitted provided that the following conditions
12   * are met:
13   * 1. Redistributions of source code must retain the above copyright
14   *    notice, this list of conditions and the following disclaimer.
15   * 2. Redistributions in binary form must reproduce the above copyright
16   *    notice, this list of conditions and the following disclaimer in the
17   *    documentation and/or other materials provided with the distribution.
18   * 3. Neither the name of the project nor the names of its contributors
19   *    may be used to endorse or promote products derived from this software
20   *    without specific prior written permission.
21   *
22   * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25   * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32   * SUCH DAMAGE.
33   */
34  
35  #include "config.h"
36  #include "miner.h"
37  
38  #ifndef SHA2_H
39  #define SHA2_H
40  
41  #define SHA256_DIGEST_SIZE ( 256 / 8)
42  #define SHA256_BLOCK_SIZE  ( 512 / 8)
43  
44  #define SHFR(x, n)    (x >> n)
45  #define ROTR(x, n)   ((x >> n) | (x << ((sizeof(x) << 3) - n)))
46  #define CH(x, y, z)  ((x & y) ^ (~x & z))
47  #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
48  
49  #define SHA256_F1(x) (ROTR(x,  2) ^ ROTR(x, 13) ^ ROTR(x, 22))
50  #define SHA256_F2(x) (ROTR(x,  6) ^ ROTR(x, 11) ^ ROTR(x, 25))
51  #define SHA256_F3(x) (ROTR(x,  7) ^ ROTR(x, 18) ^ SHFR(x,  3))
52  #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
53  
54  typedef struct {
55      unsigned int tot_len;
56      unsigned int len;
57      unsigned char block[2 * SHA256_BLOCK_SIZE];
58      uint32_t h[8];
59  } sha256_ctx;
60  
61  extern uint32_t sha256_k[64];
62  
63  void sha256_init(sha256_ctx * ctx);
64  void sha256_update(sha256_ctx *ctx, const unsigned char *message,
65                     unsigned int len);
66  void sha256_final(sha256_ctx *ctx, unsigned char *digest);
67  void sha256(const unsigned char *message, unsigned int len,
68              unsigned char *digest);
69  
70  #endif /* !SHA2_H */