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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [g-sehash.ads] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT LIBRARY COMPONENTS                          --
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--                                                                          --
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--              G N A T . S E C U R E _ H A S H E S . S H A 1               --
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--                                                                          --
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--                                 S p e c                                  --
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--                                                                          --
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--         Copyright (C) 2002-2011, Free Software Foundation, Inc.          --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This package provides supporting code for implementation of the SHA-1
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--  secure hash function as described in FIPS PUB 180-3. The complete text
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--  of FIPS PUB 180-3 can be found at:
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--    http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf
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--  This is an internal unit and should not be used directly in applications.
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--  Use GNAT.SHA1 instead.
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with GNAT.Byte_Swapping;
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with Interfaces;
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package GNAT.Secure_Hashes.SHA1 is
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   package Hash_State is new Hash_Function_State
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     (Word           => Interfaces.Unsigned_32,
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      Swap           => GNAT.Byte_Swapping.Swap4,
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      Hash_Bit_Order => System.High_Order_First);
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   --  SHA-1 operates on 32-bit big endian words
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   Block_Words : constant := 16;
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   --  Messages are processed in chunks of 16 words
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   procedure Transform
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     (H : in out Hash_State.State;
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      M : in out Message_State);
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   --  Transformation function applied for each block
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   Initial_State : constant Hash_State.State;
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   --  Initialization vector
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private
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   Initial_State : constant Hash_State.State :=
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                     (0 => 16#67452301#,
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                      1 => 16#EFCDAB89#,
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                      2 => 16#98BADCFE#,
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                      3 => 16#10325476#,
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                      4 => 16#C3D2E1F0#);
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   --  Initialization vector from FIPS PUB 180-3
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end GNAT.Secure_Hashes.SHA1;

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