| 1 |
281 |
jeremybenn |
------------------------------------------------------------------------------
|
| 2 |
|
|
-- --
|
| 3 |
|
|
-- GNAT LIBRARY COMPONENTS --
|
| 4 |
|
|
-- --
|
| 5 |
|
|
-- G N A T . S E C U R E _ H A S H E S . S H A 2 _ 3 2 --
|
| 6 |
|
|
-- --
|
| 7 |
|
|
-- S p e c --
|
| 8 |
|
|
-- --
|
| 9 |
|
|
-- Copyright (C) 2009, Free Software Foundation, Inc. --
|
| 10 |
|
|
-- --
|
| 11 |
|
|
-- GNAT is free software; you can redistribute it and/or modify it under --
|
| 12 |
|
|
-- terms of the GNU General Public License as published by the Free Soft- --
|
| 13 |
|
|
-- ware Foundation; either version 3, or (at your option) any later ver- --
|
| 14 |
|
|
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
|
| 15 |
|
|
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
|
| 16 |
|
|
-- or FITNESS FOR A PARTICULAR PURPOSE. --
|
| 17 |
|
|
-- --
|
| 18 |
|
|
-- As a special exception under Section 7 of GPL version 3, you are granted --
|
| 19 |
|
|
-- additional permissions described in the GCC Runtime Library Exception, --
|
| 20 |
|
|
-- version 3.1, as published by the Free Software Foundation. --
|
| 21 |
|
|
-- --
|
| 22 |
|
|
-- You should have received a copy of the GNU General Public License and --
|
| 23 |
|
|
-- a copy of the GCC Runtime Library Exception along with this program; --
|
| 24 |
|
|
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
|
| 25 |
|
|
-- <http://www.gnu.org/licenses/>. --
|
| 26 |
|
|
-- --
|
| 27 |
|
|
-- GNAT was originally developed by the GNAT team at New York University. --
|
| 28 |
|
|
-- Extensive contributions were provided by Ada Core Technologies Inc. --
|
| 29 |
|
|
-- --
|
| 30 |
|
|
------------------------------------------------------------------------------
|
| 31 |
|
|
|
| 32 |
|
|
-- This pacakge provides support for the 32-bit FIPS PUB 180-3 functions
|
| 33 |
|
|
-- SHA-224 and SHA-256.
|
| 34 |
|
|
|
| 35 |
|
|
-- This is an internal unit and should not be used directly in applications.
|
| 36 |
|
|
-- Use GNAT.SHA224 and GNAT.SHA256 instead.
|
| 37 |
|
|
|
| 38 |
|
|
with Interfaces;
|
| 39 |
|
|
with GNAT.Byte_Swapping;
|
| 40 |
|
|
with GNAT.Secure_Hashes.SHA2_Common;
|
| 41 |
|
|
|
| 42 |
|
|
package GNAT.Secure_Hashes.SHA2_32 is
|
| 43 |
|
|
|
| 44 |
|
|
subtype Word is Interfaces.Unsigned_32;
|
| 45 |
|
|
|
| 46 |
|
|
package Hash_State is new Hash_Function_State
|
| 47 |
|
|
(Word => Word,
|
| 48 |
|
|
Swap => GNAT.Byte_Swapping.Swap4,
|
| 49 |
|
|
Hash_Bit_Order => System.High_Order_First);
|
| 50 |
|
|
-- SHA-224 and SHA-256 operate on 32-bit big endian words
|
| 51 |
|
|
|
| 52 |
|
|
K : constant Hash_State.State (0 .. 63) :=
|
| 53 |
|
|
(16#428a2f98#, 16#71374491#, 16#b5c0fbcf#, 16#e9b5dba5#,
|
| 54 |
|
|
16#3956c25b#, 16#59f111f1#, 16#923f82a4#, 16#ab1c5ed5#,
|
| 55 |
|
|
16#d807aa98#, 16#12835b01#, 16#243185be#, 16#550c7dc3#,
|
| 56 |
|
|
16#72be5d74#, 16#80deb1fe#, 16#9bdc06a7#, 16#c19bf174#,
|
| 57 |
|
|
16#e49b69c1#, 16#efbe4786#, 16#0fc19dc6#, 16#240ca1cc#,
|
| 58 |
|
|
16#2de92c6f#, 16#4a7484aa#, 16#5cb0a9dc#, 16#76f988da#,
|
| 59 |
|
|
16#983e5152#, 16#a831c66d#, 16#b00327c8#, 16#bf597fc7#,
|
| 60 |
|
|
16#c6e00bf3#, 16#d5a79147#, 16#06ca6351#, 16#14292967#,
|
| 61 |
|
|
16#27b70a85#, 16#2e1b2138#, 16#4d2c6dfc#, 16#53380d13#,
|
| 62 |
|
|
16#650a7354#, 16#766a0abb#, 16#81c2c92e#, 16#92722c85#,
|
| 63 |
|
|
16#a2bfe8a1#, 16#a81a664b#, 16#c24b8b70#, 16#c76c51a3#,
|
| 64 |
|
|
16#d192e819#, 16#d6990624#, 16#f40e3585#, 16#106aa070#,
|
| 65 |
|
|
16#19a4c116#, 16#1e376c08#, 16#2748774c#, 16#34b0bcb5#,
|
| 66 |
|
|
16#391c0cb3#, 16#4ed8aa4a#, 16#5b9cca4f#, 16#682e6ff3#,
|
| 67 |
|
|
16#748f82ee#, 16#78a5636f#, 16#84c87814#, 16#8cc70208#,
|
| 68 |
|
|
16#90befffa#, 16#a4506ceb#, 16#bef9a3f7#, 16#c67178f2#);
|
| 69 |
|
|
-- Constants from FIPS PUB 180-3
|
| 70 |
|
|
|
| 71 |
|
|
function Sigma0 (X : Word) return Word;
|
| 72 |
|
|
function Sigma1 (X : Word) return Word;
|
| 73 |
|
|
function S0 (X : Word) return Word;
|
| 74 |
|
|
function S1 (X : Word) return Word;
|
| 75 |
|
|
pragma Inline (Sigma0, Sigma1, S0, S1);
|
| 76 |
|
|
-- Elementary functions Sigma^256_0, Sigma^256_1, sigma^256_0, sigma^256_1
|
| 77 |
|
|
-- from FIPS PUB 180-3.
|
| 78 |
|
|
|
| 79 |
|
|
procedure Transform is new SHA2_Common.Transform
|
| 80 |
|
|
(Hash_State => Hash_State,
|
| 81 |
|
|
K => K,
|
| 82 |
|
|
Rounds => 64,
|
| 83 |
|
|
Sigma0 => Sigma0,
|
| 84 |
|
|
Sigma1 => Sigma1,
|
| 85 |
|
|
S0 => S0,
|
| 86 |
|
|
S1 => S1);
|
| 87 |
|
|
|
| 88 |
|
|
SHA224_Init_State : constant Hash_State.State (0 .. 7) :=
|
| 89 |
|
|
(0 => 16#c1059ed8#,
|
| 90 |
|
|
1 => 16#367cd507#,
|
| 91 |
|
|
2 => 16#3070dd17#,
|
| 92 |
|
|
3 => 16#f70e5939#,
|
| 93 |
|
|
4 => 16#ffc00b31#,
|
| 94 |
|
|
5 => 16#68581511#,
|
| 95 |
|
|
6 => 16#64f98fa7#,
|
| 96 |
|
|
7 => 16#befa4fa4#);
|
| 97 |
|
|
SHA256_Init_State : constant Hash_State.State (0 .. 7) :=
|
| 98 |
|
|
(0 => 16#6a09e667#,
|
| 99 |
|
|
1 => 16#bb67ae85#,
|
| 100 |
|
|
2 => 16#3c6ef372#,
|
| 101 |
|
|
3 => 16#a54ff53a#,
|
| 102 |
|
|
4 => 16#510e527f#,
|
| 103 |
|
|
5 => 16#9b05688c#,
|
| 104 |
|
|
6 => 16#1f83d9ab#,
|
| 105 |
|
|
7 => 16#5be0cd19#);
|
| 106 |
|
|
-- Initialization vectors from FIPS PUB 180-3
|
| 107 |
|
|
|
| 108 |
|
|
end GNAT.Secure_Hashes.SHA2_32;
|
