45 lines
1.5 KiB
Ada
45 lines
1.5 KiB
Ada
-- Copyright (C) 2015 Daniel Otte <bg@nerilex.org>
|
|
--
|
|
-- This program is free software: you can redistribute it and/or modify
|
|
-- it under the terms of the GNU General Public License as published by
|
|
-- the Free Software Foundation, either version 3 of the License, or
|
|
-- (at your option) any later version.
|
|
--
|
|
-- This program is distributed in the hope that it will be useful,
|
|
-- but WITHOUT 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
|
|
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
with Crypto_Core_Types; use Crypto_Core_Types;
|
|
with Sha2_Small;
|
|
|
|
package SHA2_256_Spec is
|
|
|
|
Name : constant String := "SHA2-256";
|
|
|
|
type Context_T is private;
|
|
|
|
Block_Size_Bits : constant := 512;
|
|
Digest_Size_Bits : constant := 256;
|
|
|
|
Block_Size_Bytes : constant := (Block_Size_Bits) / 8;
|
|
Digest_Size_Bytes : constant := (Digest_Size_Bits) / 8;
|
|
|
|
subtype Block_T is u8_Array(1 .. Block_Size_Bytes);
|
|
subtype Digest_T is u8_Array(1 .. Digest_Size_Bytes);
|
|
|
|
procedure Initialize(Context : out Context_T);
|
|
procedure Next_Block(Context : in out Context_T; Block : in Block_T);
|
|
procedure Last_Block(Context : in out Context_T; Block : in u8_Array; Bits : in Integer := -1);
|
|
procedure Get_Digest(Context : in out Context_T; Digest : out Digest_T);
|
|
|
|
|
|
private
|
|
|
|
type Context_T is new Sha2_Small.Context_T;
|
|
|
|
end SHA2_256_Spec;
|