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Diffstat (limited to 'gcc/ada/g-md5.ads')
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1 files changed, 107 insertions, 0 deletions
diff --git a/gcc/ada/g-md5.ads b/gcc/ada/g-md5.ads new file mode 100644 index 00000000000..c89d2099f41 --- /dev/null +++ b/gcc/ada/g-md5.ads @@ -0,0 +1,107 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT LIBRARY COMPONENTS -- +-- -- +-- G N A T . M D 5 -- +-- -- +-- S p e c -- +-- -- +-- $Revision$ +-- -- +-- Copyright (C) 2002 Ada Core Technologies, 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 2, 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. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ +-- +-- This package implements 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 +-- +-- The implementation is derived from the RSA Data Secutity, Inc. MD5 +-- Message-Digest Algorithm, as described in RFC 1321. + +with Ada.Streams; +with Interfaces; + +package GNAT.MD5 is + + type Context is private; + -- This type is the four-word (16 byte) MD buffer, as described in + -- RFC 1321 (3.3). It initial value is Initial_Context below. + + Initial_Context : constant Context; + -- Initial value of a Context object. May be used to reinitialize + -- a Context value by simple assignment of this value to the object. + + procedure Update + (C : in out Context; + Input : String); + procedure Wide_Update + (C : in out Context; + Input : Wide_String); + procedure Update + (C : in out Context; + Input : Ada.Streams.Stream_Element_Array); + -- Modify the Context C. If C has the initial value Initial_Context, + -- then, after a call to one of these procedures, Digest (C) will return + -- the Message-Digest of Input. + -- + -- These procedures may be called successively with the same context and + -- different inputs. However, several successive calls will not produce + -- the same final context as a call with the concatenation of the inputs. + + subtype Message_Digest is String (1 .. 32); + -- The string type returned by function Digest. + + function Digest (C : Context) return Message_Digest; + -- Extracts the Message-Digest from a context. This function should be + -- used after one or several calls to Update. + + function Digest (S : String) return Message_Digest; + function Wide_Digest (W : Wide_String) return Message_Digest; + function Digest + (A : Ada.Streams.Stream_Element_Array) + return Message_Digest; + -- These functions are equivalent to the corresponding Update (or + -- Wide_Update) on a default initialized Context, followed by Digest + -- on the resulting Context. + +private + + -- Magic numbers + Initial_A : constant := 16#67452301#; + Initial_B : constant := 16#EFCDAB89#; + Initial_C : constant := 16#98BADCFE#; + Initial_D : constant := 16#10325476#; + + type Context is record + A : Interfaces.Unsigned_32 := Initial_A; + B : Interfaces.Unsigned_32 := Initial_B; + C : Interfaces.Unsigned_32 := Initial_C; + D : Interfaces.Unsigned_32 := Initial_D; + end record; + + Initial_Context : constant Context := + (A => Initial_A, B => Initial_B, C => Initial_C, D => Initial_D); + +end GNAT.MD5; |