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ffa_ch6_simplest_...    1 ------------------------------------------------------------------------------
ffa_ch6_simplest_...    2 ------------------------------------------------------------------------------
ffa_ch6_simplest_...    3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'.               --
ffa_ch6_simplest_...    4 --                                                                          --
ffa_ch6_simplest_...    5 -- (C) 2017 Stanislav Datskovskiy ( www.loper-os.org )                      --
ffa_ch6_simplest_...    6 -- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     --
ffa_ch6_simplest_...    7 --                                                                          --
ffa_ch6_simplest_...    8 -- You do not have, nor can you ever acquire the right to use, copy or      --
ffa_ch6_simplest_...    9 -- distribute this software ; Should you use this software for any purpose, --
ffa_ch6_simplest_...   10 -- or copy and distribute it to anyone or in any manner, you are breaking   --
ffa_ch6_simplest_...   11 -- the laws of whatever soi-disant jurisdiction, and you promise to         --
ffa_ch6_simplest_...   12 -- continue doing so for the indefinite future. In any case, please         --
ffa_ch6_simplest_...   13 -- always : read and understand any software ; verify any PGP signatures    --
ffa_ch6_simplest_...   14 -- that you use - for any purpose.                                          --
ffa_ch6_simplest_...   15 --                                                                          --
ffa_ch6_simplest_...   16 -- See also http://trilema.com/2015/a-new-software-licensing-paradigm .     --
ffa_ch6_simplest_...   17 ------------------------------------------------------------------------------
ffa_ch6_simplest_...   18 ------------------------------------------------------------------------------
ffa_ch6_simplest_...   19 
ffa_ch6_simplest_...   20 with FZ_Type; use FZ_Type;
ffa_ch6_simplest_...   21 
ffa_ch6_simplest_...   22 
ffa_ch6_simplest_...   23 package FZ_ModEx is
ffa_ch6_simplest_...   24    
ffa_ch6_simplest_...   25    pragma Pure;
ffa_ch6_simplest_...   26    
ffa_ch6_simplest_...   27    -- Modular Multiply: Product := X*Y mod Modulus
ffa_ch6_simplest_...   28    procedure FZ_Mod_Mul(X        : in  FZ;
ffa_ch6_simplest_...   29                         Y        : in  FZ;
ffa_ch6_simplest_...   30                         Modulus  : in  FZ;
ffa_ch6_simplest_...   31                         Product  : out FZ);
ffa_ch6_simplest_...   32    pragma Precondition(X'Length = Y'Length and
ffa_ch6_simplest_...   33                          Modulus'Length = X'Length and
ffa_ch6_simplest_...   34                          Product'Length = Modulus'Length);
ffa_ch6_simplest_...   35    
ffa_ch6_simplest_...   36    -- Modular Exponent: Result := Base^Exponent mod Modulus
ffa_ch6_simplest_...   37    procedure FZ_Mod_Exp(Base     : in  FZ;
ffa_ch6_simplest_...   38                         Exponent : in  FZ;
ffa_ch6_simplest_...   39                         Modulus  : in  FZ;
ffa_ch6_simplest_...   40                         Result   : out FZ);
ffa_ch6_simplest_...   41    pragma Precondition(Base'Length = Exponent'Length and
ffa_ch6_simplest_...   42                          Base'Length = Result'Length and
ffa_ch6_simplest_...   43                          Base'Length = Modulus'Length);
ffa_ch6_simplest_...   44    
ffa_ch6_simplest_...   45 end FZ_ModEx;