projects / thirdparty / gcc.git / blame
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|---|---|---|
| 47257438 AC |
1 | ------------------------------------------------------------------------------ |
| 2 | -- -- | |
| fed1bd44 | 3 | -- GNAT LIBRARY COMPONENTS -- |
| 47257438 | 4 | -- -- |
| 36e76408 | 5 | -- G N A T . S E C U R E _ H A S H E S . M D 5 -- |
| 47257438 AC |
6 | -- -- |
| 7 | -- S p e c -- | |
| 8 | -- -- | |
| 4b490c1e | 9 | -- Copyright (C) 2002-2020, Free Software Foundation, Inc. -- |
| 47257438 AC |
10 | -- -- |
| 11 | -- GNAT is free software; you can redistribute it and/or modify it under -- | |
| 12 | -- terms of the GNU General Public License as published by the Free Soft- -- | |
| 13 | -- ware Foundation; either version 3, or (at your option) any later ver- -- | |
| 14 | -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- | |
| 15 | -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
| 16 | -- or FITNESS FOR A PARTICULAR PURPOSE. -- | |
| 17 | -- -- | |
| 18 | -- As a special exception under Section 7 of GPL version 3, you are granted -- | |
| 19 | -- additional permissions described in the GCC Runtime Library Exception, -- | |
| 20 | -- version 3.1, as published by the Free Software Foundation. -- | |
| 21 | -- -- | |
| 22 | -- You should have received a copy of the GNU General Public License and -- | |
| 23 | -- a copy of the GCC Runtime Library Exception along with this program; -- | |
| 24 | -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |
| 25 | -- <http://www.gnu.org/licenses/>. -- | |
| 26 | -- -- | |
| 27 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 28 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- | |
| 29 | -- -- | |
| 30 | ------------------------------------------------------------------------------ | |
| 31 | ||
| 32 | -- This package provides supporting code for implementation of the MD5 | |
| 33 | -- Message-Digest Algorithm as described in RFC 1321. The complete text of | |
| 34 | -- RFC 1321 can be found at: | |
| 35 | -- http://www.ietf.org/rfc/rfc1321.txt | |
| 36 | ||
| 36e76408 TQ |
37 | -- This is an internal unit and should not be used directly in applications. |
| 38 | -- Use GNAT.MD5 instead. | |
| 39 | ||
| 47257438 AC |
40 | with GNAT.Byte_Swapping; |
| 41 | with Interfaces; | |
| 42 | ||
| 36e76408 | 43 | package GNAT.Secure_Hashes.MD5 is |
| 47257438 AC |
44 | |
| 45 | package Hash_State is | |
| 36e76408 | 46 | new GNAT.Secure_Hashes.Hash_Function_State |
| 47257438 AC |
47 | (Word => Interfaces.Unsigned_32, |
| 48 | Swap => GNAT.Byte_Swapping.Swap4, | |
| 49 | Hash_Bit_Order => System.Low_Order_First); | |
| 50 | -- MD5 operates on 32-bit little endian words | |
| 51 | ||
| c5fdd4ad | 52 | Block_Words : constant := 16; |
| 47257438 AC |
53 | -- Messages are processed in chunks of 16 words |
| 54 | ||
| 55 | procedure Transform | |
| 56 | (H : in out Hash_State.State; | |
| 57 | M : in out Message_State); | |
| 58 | -- Transformation function applied for each block | |
| 59 | ||
| 60 | Initial_State : constant Hash_State.State; | |
| 61 | -- Initialization vector | |
| 62 | ||
| 63 | private | |
| 64 | ||
| 65 | Initial_A : constant := 16#67452301#; | |
| 66 | Initial_B : constant := 16#EFCDAB89#; | |
| 67 | Initial_C : constant := 16#98BADCFE#; | |
| 68 | Initial_D : constant := 16#10325476#; | |
| 69 | ||
| 70 | Initial_State : constant Hash_State.State := | |
| 71 | (Initial_A, Initial_B, Initial_C, Initial_D); | |
| 72 | -- Initialization vector from RFC 1321 | |
| 73 | ||
| 36e76408 | 74 | end GNAT.Secure_Hashes.MD5; |