annotate gcc/ada/libgnat/g-shshco.ads @ 131:84e7813d76e9

gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT LIBRARY COMPONENTS --
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4 -- --
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5 -- G N A T . S E C U R E _ H A S H E S . S H A 2 _ C O M M O N --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 2009-2018, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This package provides supporting code for implementation of the following
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33 -- secure hash functions described in FIPS PUB 180-3: SHA-224, SHA-256,
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34 -- SHA-384, SHA-512. It contains the generic transform operation that is
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35 -- common to the above four functions. The complete text of FIPS PUB 180-3
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36 -- can be found at:
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37 -- http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf
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38
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39 -- This is an internal unit and should not be used directly in applications.
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40 -- Use GNAT.SHA* instead.
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41
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42 package GNAT.Secure_Hashes.SHA2_Common is
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43
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44 Block_Words : constant := 16;
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45 -- All functions operate on blocks of 16 words
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46
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47 generic
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48 with package Hash_State is new Hash_Function_State (<>);
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49
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50 Rounds : Natural;
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51 -- Number of transformation rounds
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52
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53 K : Hash_State.State;
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54 -- Constants used in the transform operation
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55
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56 with function Sigma0 (X : Hash_State.Word) return Hash_State.Word is <>;
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57 with function Sigma1 (X : Hash_State.Word) return Hash_State.Word is <>;
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58 with function S0 (X : Hash_State.Word) return Hash_State.Word is <>;
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59 with function S1 (X : Hash_State.Word) return Hash_State.Word is <>;
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60 -- FIPS PUB 180-3 elementary functions
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61
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62 procedure Transform
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63 (H_St : in out Hash_State.State;
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64 M_St : in out Message_State);
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65
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66 end GNAT.Secure_Hashes.SHA2_Common;