1 ------------------------------------------------------------------------------
3 -- GNAT LIBRARY COMPONENTS --
5 -- G N A T . S E C U R E _ H A S H E S . S H A 2 _ 6 4 --
9 -- Copyright (C) 2009-2017, Free Software Foundation, Inc. --
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. --
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. --
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/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 package body GNAT
.Secure_Hashes
.SHA2_64
is
40 function Sigma0
(X
: Word
) return Word
is
42 return Rotate_Right
(X
, 28)
43 xor Rotate_Right
(X
, 34)
44 xor Rotate_Right
(X
, 39);
51 function Sigma1
(X
: Word
) return Word
is
53 return Rotate_Right
(X
, 14)
54 xor Rotate_Right
(X
, 18)
55 xor Rotate_Right
(X
, 41);
62 function S0
(X
: Word
) return Word
is
64 return Rotate_Right
(X
, 1)
65 xor Rotate_Right
(X
, 8)
66 xor Shift_Right
(X
, 7);
73 function S1
(X
: Word
) return Word
is
75 return Rotate_Right
(X
, 19)
76 xor Rotate_Right
(X
, 61)
77 xor Shift_Right
(X
, 6);
80 end GNAT
.Secure_Hashes
.SHA2_64
;