------------------------------------------------------------------------------ -- -- -- 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) 2002-2020, 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 -- -- . -- -- -- -- 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;