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------------------------------------------------------------------------------ -- -- -- GNAT LIBRARY COMPONENTS -- -- -- -- G N A T . S E C U R E _ H A S H E S . S H A 2 _ 6 4 -- -- -- -- B o d y -- -- -- -- Copyright (C) 2009, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- <http://www.gnu.org/licenses/>. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ package body GNAT.Secure_Hashes.SHA2_64 is use Interfaces; ------------ -- Sigma0 -- ------------ function Sigma0 (X : Word) return Word is begin return Rotate_Right (X, 28) xor Rotate_Right (X, 34) xor Rotate_Right (X, 39); end Sigma0; ------------ -- Sigma1 -- ------------ function Sigma1 (X : Word) return Word is begin return Rotate_Right (X, 14) xor Rotate_Right (X, 18) xor Rotate_Right (X, 41); end Sigma1; -------- -- S0 -- -------- function S0 (X : Word) return Word is begin return Rotate_Right (X, 1) xor Rotate_Right (X, 8) xor Shift_Right (X, 7); end S0; -------- -- S1 -- -------- function S1 (X : Word) return Word is begin return Rotate_Right (X, 19) xor Rotate_Right (X, 61) xor Shift_Right (X, 6); end S1; end GNAT.Secure_Hashes.SHA2_64;