File : 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 -- --
19 -- --
20 -- --
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 package 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;