gcc/ada/g-shsh64.ads

   1 ------------------------------------------------------------------------------
   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 _ 6 4            --
   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 64-bit FIPS PUB 180-3 functions
  33 --  SHA-384 and SHA-512.
  34
  35 --  This is an internal unit and should not be used directly in applications.
  36 --  Use GNAT.SHA384 and GNAT.SHA512 instead.
  37
  38 with Interfaces;
  39 with GNAT.Byte_Swapping;
  40
  41 with GNAT.Secure_Hashes.SHA2_Common;
  42
  43 package GNAT.Secure_Hashes.SHA2_64 is
  44    subtype Word is Interfaces.Unsigned_64;
  45
  46    package Hash_State is new Hash_Function_State
  47      (Word           => Word,
  48       Swap           => GNAT.Byte_Swapping.Swap8,
  49       Hash_Bit_Order => System.High_Order_First);
  50    --  SHA-384 and SHA-512 operate on 64-bit big endian words
  51
  52    K : Hash_State.State (0 .. 79) :=
  53          (16#428a2f98d728ae22#, 16#7137449123ef65cd#,
  54           16#b5c0fbcfec4d3b2f#, 16#e9b5dba58189dbbc#,
  55           16#3956c25bf348b538#, 16#59f111f1b605d019#,
  56           16#923f82a4af194f9b#, 16#ab1c5ed5da6d8118#,
  57           16#d807aa98a3030242#, 16#12835b0145706fbe#,
  58           16#243185be4ee4b28c#, 16#550c7dc3d5ffb4e2#,
  59           16#72be5d74f27b896f#, 16#80deb1fe3b1696b1#,
  60           16#9bdc06a725c71235#, 16#c19bf174cf692694#,
  61           16#e49b69c19ef14ad2#, 16#efbe4786384f25e3#,
  62           16#0fc19dc68b8cd5b5#, 16#240ca1cc77ac9c65#,
  63           16#2de92c6f592b0275#, 16#4a7484aa6ea6e483#,
  64           16#5cb0a9dcbd41fbd4#, 16#76f988da831153b5#,
  65           16#983e5152ee66dfab#, 16#a831c66d2db43210#,
  66           16#b00327c898fb213f#, 16#bf597fc7beef0ee4#,
  67           16#c6e00bf33da88fc2#, 16#d5a79147930aa725#,
  68           16#06ca6351e003826f#, 16#142929670a0e6e70#,
  69           16#27b70a8546d22ffc#, 16#2e1b21385c26c926#,
  70           16#4d2c6dfc5ac42aed#, 16#53380d139d95b3df#,
  71           16#650a73548baf63de#, 16#766a0abb3c77b2a8#,
  72           16#81c2c92e47edaee6#, 16#92722c851482353b#,
  73           16#a2bfe8a14cf10364#, 16#a81a664bbc423001#,
  74           16#c24b8b70d0f89791#, 16#c76c51a30654be30#,
  75           16#d192e819d6ef5218#, 16#d69906245565a910#,
  76           16#f40e35855771202a#, 16#106aa07032bbd1b8#,
  77           16#19a4c116b8d2d0c8#, 16#1e376c085141ab53#,
  78           16#2748774cdf8eeb99#, 16#34b0bcb5e19b48a8#,
  79           16#391c0cb3c5c95a63#, 16#4ed8aa4ae3418acb#,
  80           16#5b9cca4f7763e373#, 16#682e6ff3d6b2b8a3#,
  81           16#748f82ee5defb2fc#, 16#78a5636f43172f60#,
  82           16#84c87814a1f0ab72#, 16#8cc702081a6439ec#,
  83           16#90befffa23631e28#, 16#a4506cebde82bde9#,
  84           16#bef9a3f7b2c67915#, 16#c67178f2e372532b#,
  85           16#ca273eceea26619c#, 16#d186b8c721c0c207#,
  86           16#eada7dd6cde0eb1e#, 16#f57d4f7fee6ed178#,
  87           16#06f067aa72176fba#, 16#0a637dc5a2c898a6#,
  88           16#113f9804bef90dae#, 16#1b710b35131c471b#,
  89           16#28db77f523047d84#, 16#32caab7b40c72493#,
  90           16#3c9ebe0a15c9bebc#, 16#431d67c49c100d4c#,
  91           16#4cc5d4becb3e42b6#, 16#597f299cfc657e2a#,
  92           16#5fcb6fab3ad6faec#, 16#6c44198c4a475817#);
  93    --  Constants from FIPS PUB 180-3
  94
  95    function Sigma0 (X : Word) return Word;
  96    function Sigma1 (X : Word) return Word;
  97    function S0 (X : Word) return Word;
  98    function S1 (X : Word) return Word;
  99    pragma Inline (Sigma0, Sigma1, S0, S1);
 100    --  Elementary functions Sigma^512_0, Sigma^512_1, sigma^512_0, sigma^512_1
 101    --  from FIPS PUB 180-3.
 102
 103    procedure Transform is new SHA2_Common.Transform
 104      (Hash_State => Hash_State,
 105       K          => K,
 106       Rounds     => 80,
 107       Sigma0     => Sigma0,
 108       Sigma1     => Sigma1,
 109       S0         => S0,
 110       S1         => S1);
 111
 112    SHA384_Init_State : constant Hash_State.State :=
 113                          (0 => 16#cbbb9d5dc1059ed8#,
 114                           1 => 16#629a292a367cd507#,
 115                           2 => 16#9159015a3070dd17#,
 116                           3 => 16#152fecd8f70e5939#,
 117                           4 => 16#67332667ffc00b31#,
 118                           5 => 16#8eb44a8768581511#,
 119                           6 => 16#db0c2e0d64f98fa7#,
 120                           7 => 16#47b5481dbefa4fa4#);
 121    SHA512_Init_State : constant Hash_State.State :=
 122                          (0 => 16#6a09e667f3bcc908#,
 123                           1 => 16#bb67ae8584caa73b#,
 124                           2 => 16#3c6ef372fe94f82b#,
 125                           3 => 16#a54ff53a5f1d36f1#,
 126                           4 => 16#510e527fade682d1#,
 127                           5 => 16#9b05688c2b3e6c1f#,
 128                           6 => 16#1f83d9abfb41bd6b#,
 129                           7 => 16#5be0cd19137e2179#);
 130    --  Initialization vectors from FIPS PUB 180-3
 131
 132 end GNAT.Secure_Hashes.SHA2_64;