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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 1 --
-- --
-- S p e c --
-- --
-- Copyright (C) 2002-2009, 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. --
-- --
------------------------------------------------------------------------------
-- This package provides supporting code for implementation of the SHA-1
-- secure hash function as described in FIPS PUB 180-3. The complete text
-- of FIPS PUB 180-3 can be found at:
-- http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf
-- This is an internal unit and should not be used directly in applications.
-- Use GNAT.SHA1 instead.
with GNAT.Byte_Swapping;
with Interfaces;
package GNAT.Secure_Hashes.SHA1 is
package Hash_State is new Hash_Function_State
(Word => Interfaces.Unsigned_32,
Swap => GNAT.Byte_Swapping.Swap4,
Hash_Bit_Order => System.High_Order_First);
-- SHA-1 operates on 32-bit big endian words
Block_Words : constant := 16;
-- Messages are processed in chunks of 16 words
procedure Transform
(H : in out Hash_State.State;
M : in out Message_State);
-- Transformation function applied for each block
Initial_State : constant Hash_State.State;
-- Initialization vector
private
Initial_State : constant Hash_State.State :=
(0 => 16#67452301#,
1 => 16#EFCDAB89#,
2 => 16#98BADCFE#,
3 => 16#10325476#,
4 => 16#C3D2E1F0#);
-- Initialization vector from FIPS PUB 180-3
end GNAT.Secure_Hashes.SHA1;
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