| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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; |
