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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) 2002-2011, 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;