46 lines
1.5 KiB
Ada
46 lines
1.5 KiB
Ada
-- Copyright (C) 2015 Daniel Otte <bg@nerilex.org>
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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package body SHA2_224_Spec is
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IV : constant u32_Array(1 .. 8) :=
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(
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16#c1059ed8#, 16#367cd507#, 16#3070dd17#, 16#f70e5939#,
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16#ffc00b31#, 16#68581511#, 16#64f98fa7#, 16#befa4fa4#
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);
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procedure Initialize(Context : out Context_T) is
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begin
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Context.H := IV;
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Context.Counter := 0;
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end;
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procedure Next_Block(Context : in out Context_T; Block : in Block_512_Bit) is
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begin
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Sha2_Small.Next_Block(Sha2_Small.Context_T(Context), Block);
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end;
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procedure Last_Block(Context : in out Context_T; Block : in u8_Array; Bits : in Integer := -1) is
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begin
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Sha2_Small.Last_Block(Sha2_Small.Context_T(Context), Block, Bits);
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end;
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procedure Get_Digest(Context : in out Context_T; Digest : out Block_224_Bit) is
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begin
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Store_BE(Digest, Context.H(1 .. 7));
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end;
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end SHA2_224_Spec;
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