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Diffstat (limited to 'gcc/ada/g-sehash.ads')
| -rw-r--r-- | gcc/ada/g-sehash.ads | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/gcc/ada/g-sehash.ads b/gcc/ada/g-sehash.ads new file mode 100644 index 00000000000..e03f8a28146 --- /dev/null +++ b/gcc/ada/g-sehash.ads @@ -0,0 +1,72 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 decsribed 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; |