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------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- G N A T . S E C U R E _ H A S H E S . M D 5 --
-- --
-- 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 MD5
-- Message-Digest Algorithm as described in RFC 1321. The complete text of
-- RFC 1321 can be found at:
-- http://www.ietf.org/rfc/rfc1321.txt
-- This is an internal unit and should not be used directly in applications.
-- Use GNAT.MD5 instead.
with GNAT.Byte_Swapping;
with Interfaces;
package GNAT.Secure_Hashes.MD5 is
package Hash_State is
new GNAT.Secure_Hashes.Hash_Function_State
(Word => Interfaces.Unsigned_32,
Swap => GNAT.Byte_Swapping.Swap4,
Hash_Bit_Order => System.Low_Order_First);
-- MD5 operates on 32-bit little 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_A : constant := 16#67452301#;
Initial_B : constant := 16#EFCDAB89#;
Initial_C : constant := 16#98BADCFE#;
Initial_D : constant := 16#10325476#;
Initial_State : constant Hash_State.State :=
(Initial_A, Initial_B, Initial_C, Initial_D);
-- Initialization vector from RFC 1321
end GNAT.Secure_Hashes.MD5;
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