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simeck.sty
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simeck.sty
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\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{simeck}[2024/01/17 Utils for illustrating the SIMECK cipher]
%%% PREREQUISITES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\RequirePackage{amsmath,amssymb}
\RequirePackage{tikz}
\RequirePackage{xspace}
\usetikzlibrary{patterns,patterns.meta}
\usetikzlibrary{calc,cipher}
%%% GENERAL CRYPTO UTILS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\providecommand{\cipher}[1]{\textsf{#1}}
\providecommand{\PattCell}[2][black]{\draw[pattern color=#1,pattern={Lines[angle=45,distance=0.5mm]}] (#2) ++(-.5,.5) rectangle +(1,-1);}
\providecommand{\MarkCell}[2][marc]{\fill[#1] (#2) ++(-.5,.5) -- +(0,-.3) -- +(.7,-1) -- +(1,-1) -- +(1,-.7) -- +(.3,0) -- cycle;}
\providecommand{\MarkCellN}[2][marcn]{\fill[#1] (#2) ++(-.5,.5) -- +(0,-.3) -- +(.7,-1) -- +(1,-1) -- +(1,-.7) -- +(.3,0) -- cycle;}
\providecommand{\MarkCellF}[2][marcf]{\fill[transform canvas={rotate around={90:(#2)}},#1] (#2) ++(-.5,.5) -- +(0,-.3) -- +(.7,-1) -- +(1,-1) -- +(1,-.7) -- +(.3,0) -- cycle;}
\providecommand{\FrameCell}[2][fillopts]{\draw[very thick, rounded corners=1pt][#1] (#2) ++(-.5,.5) rectangle +(1,-1);}
%%% SIMECK UTILS & OPTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand{\SIMECK}[1][]{\if\relax\detokenize{#1}\relax\cipher{SIMECK}\else\mbox{\cipher{SIMECK}-#1}\fi\xspace}
\tikzset{%
simeckstateopts/.style={scale=.15},
simecklabelstyle/.style={font=\scriptsize,inner sep=1pt,above},
}
\newif\ifsimeckshowkey\simeckshowkeytrue
\newif\ifsimeckcompact\simeckcompacttrue
\newif\ifsimecknosubst\simecknosubstfalse
\colorlet{upperunknown}{blue}
\colorlet{lowerunknown}{green}
\colorlet{zero}{white}
\colorlet{upperone}{red}
\colorlet{lowerone}{red}
\colorlet{active}{pink}
\colorlet{one}{orange}
\colorlet{unknown}{cyan}
% Macros to fill the upper and lower triangles of a cell
\providecommand{\TFill}[2][tugviolet]{\fill[#1] (#2) ++(-.5,.5) -- +(0,-1) -- +(1,0) -- cycle;}
\providecommand{\BFill}[2][tuggreen!70!green]{\fill[#1] (#2) ++(.5,-.5) -- +(0,1) -- +(-1,0) -- cycle;}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\providecommand{\legendwrap}[1]{\tikz[stateopts,baseline=(base)]{#1 \draw[raster] (-.5,.5) rectangle (.5,-.5) ++(0,.20) coordinate (base);}}
\newcommand{\dllegupper}[1][black]{\legendwrap{\TFill[#1]{0,0}}}
\newcommand{\dlleglower}[1][black]{\legendwrap{\BFill[#1]{0,0}}}
\newcommand{\dllegfill}[1][black]{\legendwrap{\Fill[#1]{0,0}}}
\newcommand{\dllegPatt}[1][black]{\legendwrap{\PattCell[#1]{0,0}}}
\newcommand{\dllegMark}[1][black]{\legendwrap{\MarkCell[#1]{0,0}}}
\newcommand{\dllegMarkN}[1][black]{\legendwrap{\MarkCellN[#1]{0,0}}}
\newcommand{\dllegMarkF}[1][black]{\legendwrap{\MarkCellF[#1]{0,0}}}
\newcommand{\dllegFrame}[1][black]{\legendwrap{\FrameCell[#1]{0,0}}}
\newcommand{\dlattack}{%
\small
\dllegfill[one] 1
\dllegfill[unknown] any
\dllegPatt[black] difference is needed
\dllegMark[red] value is needed
\dllegfill[active] involved in the key recovery
\dllegFrame[yellow] filter
}
\newcommand{\dldistinguisher}{
\small
\begin{tabular}{ll}
\dllegupper[upperone] bit difference (linear mask) 1 forward &
\dlleglower[lowerone] bit difference (linear mask) 1 backward \\
\dllegupper[upperunknown] unknown difference (linear mask) forward &
\dlleglower[lowerunknown] unknown difference (linear mask) backward \\
\end{tabular}
}
%%% SIMECK ROUND FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand{\SimeckHalfState}[1]{%
\tikz[simeckstateopts]{
\foreach \s in {0,...,\lastB} { \draw (\s+.5,-.5) coordinate (s\s); }
\draw (8,-.5) coordinate (label);
#1
\draw (0,0) rectangle (\sizeB,-1);
\foreach \x in {1,...,\lastB} {
\draw[raster] (\x,0) -- ++(0,-1);
}
}%
}
\newcommand{\SimeckInit}[1][32]{
\pgfmathsetmacro{\sizeB}{int(div(#1,2))}
\pgfmathsetmacro{\lastB}{int(div(#1,2)-1)}
\pgfmathsetmacro{\bitdim}{0.15}
\pgfmathsetmacro{\rotA}{5}
\pgfmathsetmacro{\rotB}{1}
%\ifsimecknosubst
%\pgfmathsetmacro{\halfword}{div(\sizeB,3)*\bitdim}
%\else
\pgfmathsetmacro{\halfword}{div(\sizeB,2)*\bitdim}
%\fi
\ifsimeckcompact
\pgfmathsetmacro{\wordvsep}{.3}
\tikzset{simecklabelstyle/.append style={below}}
\else
\pgfmathsetmacro{\wordvsep}{.45}
\fi
\coordinate (here);
\draw (0,0) coordinate (L) coordinate (Lhere)
++(.9,0) coordinate (LL) % LL.center = LM.west
++(\halfword,0) coordinate (LM)
++(\halfword+.45,0) coordinate (MM)
++(\halfword+.45,0) coordinate (RM)
++(\halfword,0) coordinate (RR) % RR.center = RM.east
++(.9,0) coordinate (R) coordinate (Rhere);
}
\newcommand{\SimeckRound}[9]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t1)
++(0,-\wordvsep) coordinate[tee] (t2)
++(0,-\wordvsep) coordinate[tee] (t3)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\ifsimeckshowkey
\draw (R|-t1) coordinate[xor] (x1); % key
\fi
\draw (MM|-t2) coordinate[andalt] (a1);
\draw (MM|-t3) coordinate[xor] (x2); % mid
\draw (R|-t3) coordinate[xor] (x3); % feistel
\draw (LM|-t1) node[state] (LM1) {\SimeckHalfState{#4}};
\draw (LM|-t2) node[state] (LM2) {\SimeckHalfState{#5}};
\draw (LM|-t3) node[state] (LM3) {\SimeckHalfState{#6}};
\ifsimeckshowkey
\draw (RM|-t1) node[state] (RM1) {\SimeckHalfState{#7}};
\fi
\draw (RM|-t2) node[state] (RM2) {\SimeckHalfState{#8}};
\draw (RM|-t3) node[state] (RM3) {\SimeckHalfState{#9}};
\draw (t1) -- (LM1);
\draw (t2) -- node[below,simecklabelstyle] {$\lll \rotA$} (LM2);
\draw (t3) -- node[below,simecklabelstyle] {$\lll \rotB$} (LM3);
\begin{scope}[rounded corners=2pt,->]
\ifsimeckshowkey
\draw (RM1) -- node[below,simecklabelstyle] {$K_{#1}$} (x1);
\fi
\draw (LM1) -| (a1);
\draw (LM2) -- (a1);
\draw (a1) -- (x2);
% \draw (RM2) -- (x4);
% \draw[\ifsimeckcompact-\fi] (a1) -- (x2);
\draw (LM3) -- (x2);
\draw (x2) -- (RM3);
\draw (RM3) -- (x3);
\ifsimeckshowkey
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x1);
\draw (x1) -- (x3);
\else
\draw (Rhere|-RRhere.south) -- (x3);
\fi
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x3) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
}
\newcommand{\SimeckRoundShort}[3]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\draw (R|-t) coordinate[xor] (x);
\draw[->] (t) -- node[fill=white,draw,rounded corners=2pt] {$F_K$} (x); % TODO put desired name of round function here
\begin{scope}[rounded corners=2pt,->]
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x);
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
}
\newcommand{\SimeckRoundShortL}[3]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t)
++(0,-.3) coordinate (swapini)
++(0,-3*\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,0.5*\bitdim) coordinate (end);
\draw (R|-t) coordinate[xor] (x);
\draw[->] (t) -- node[fill=white,draw,rounded corners=2pt] {$F_K$} (x); % TODO put desired name of round function here
\begin{scope}[rounded corners=2pt,->]
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x);
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
}
\newcommand{\SimeckRoundShortR}[5]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\draw (R|-t) coordinate[xor] (x);
\draw[->] (t) -- node[fill=white,draw,rounded corners=2pt] {$F_K$} (x); % TODO put desired name of round function here
\begin{scope}[rounded corners=2pt,->]
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x);
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
\pgfmathsetmacro{\inputnext}{int(#1)}
\draw (LL|-here) node[state,label=right:$L_{\inputnext}$] (LLhere) {\SimeckHalfState{#4}};
\draw (RR|-here) node[state, label=left:$R_{\inputnext}$] (RRhere) {\SimeckHalfState{#5}};
}
\newcommand{\SimeckRoundShortRU}[5]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L'_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R'_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\draw (R|-t) coordinate[xor] (x);
\draw[->] (t) -- node[fill=white,draw,rounded corners=2pt] {$F_K$} (x); % TODO put desired name of round function here
\begin{scope}[rounded corners=2pt,->]
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x);
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
\pgfmathsetmacro{\inputnext}{int(#1)}
\draw (LL|-here) node[state,label=right:$L_{\inputnext}$] (LLhere) {\SimeckHalfState{#4}};
\draw (RR|-here) node[state, label=left:$R_{\inputnext}$] (RRhere) {\SimeckHalfState{#5}};
}
\newcommand{\SimeckRoundShortRL}[5]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\draw (R|-t) coordinate[xor] (x);
\draw[->] (t) -- node[fill=white,draw,rounded corners=2pt] {$F_K$} (x); % TODO put desired name of round function here
\begin{scope}[rounded corners=2pt,->]
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x);
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
\pgfmathsetmacro{\inputnext}{int(#1)}
\draw (LL|-here) node[state,label=right:$L'_{\inputnext}$] (LLhere) {\SimeckHalfState{#4}};
\draw (RR|-here) node[state, label=left:$R'_{\inputnext}$] (RRhere) {\SimeckHalfState{#5}};
}
\newcommand{\SimeckRoundEQ}[9]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t0)
++(0,-\wordvsep) coordinate (t1)
++(0,-\wordvsep) coordinate[tee] (t2)
++(0,-\wordvsep) coordinate[tee] (t3)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\ifsimeckshowkey
\draw (R|-t1) coordinate (x1);
\draw (L|-t1) coordinate(x4); % key
\fi
\draw (MM|-t2) coordinate[andalt] (a1);
\draw (MM|-t3) coordinate[xor] (x2); % mid
\draw (R|-t3) coordinate[xor] (x3); % feistel
\draw (LL|-t1) node[state] (LL1) {};
\draw (LM|-t0) node[state] (LM0) {\SimeckHalfState{#4}};
\draw (LM|-t2) node[state] (LM2) {\SimeckHalfState{#5}};
\draw (LM|-t3) node[state] (LM3) {\SimeckHalfState{#6}};
\ifsimeckshowkey
% \draw (RM|-t1) node[state] (RM1) {\SimeckHalfState{#7}};
\draw (LM|-t1) node[state] (LM1) {\SimeckHalfState{#7}};
\fi
\draw (RM|-t2) node[state] (RM2) {\SimeckHalfState{#8}};
\draw (RM|-t3) node[state] (RM3) {\SimeckHalfState{#9}};
% \draw (t1) coordinate[xor] (LM1);
\draw (t0) -- (LM0);
\draw (t2) -- node[above right] {\tiny{$\lll \rotA$}} (LM2);
\draw (t3) -- node[above right] {\tiny{$\lll \rotB$}} (LM3);
\draw (L|-t0) -- node[xor] (b1) {} (LL|-t0);
\draw (L|-t2) -- node[xor] (b2) {} (LL|-t2);
\draw (b1) -- node[tee](bm) {} (b2);
\draw (bm) -- (LM1);
% \draw (LL|-t1) -- (x4) node[above left] {\tiny{$K_{\inputidx}^e$}};
\draw (LL|-t1) node[above] {\tiny{$K_{\inputidx}^e$}};
\begin{scope}[rounded corners=2pt,->]
\ifsimeckshowkey
% \draw (RM1) -- node[below,simecklabelstyle] {$K_{#1}$} (x1);
% \draw (x4) -- (LL1);
\draw (b1) -- (b2);
\draw (b2) -- (b1);
\fi
\draw (LM0) -| (a1);
\draw (LM2) -- (a1);
\draw (a1) -- (x2);
% \draw (RM2) -- (x4);
% \draw[\ifsimeckcompact-\fi] (a1) -- (x2);
\draw (LM3) -- (x2);
\draw (x2) -- (RM3);
\draw (RM3) -- (x3);
\ifsimeckshowkey
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x3);
% \draw (x1) -- (x3);
\else
% \draw (Rhere|-RRhere.south) -- (x3);
\fi
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x3) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
}
\newcommand{\SimeckNoKey}[7]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t1)
++(0,-\wordvsep) coordinate[tee] (t2)
++(0,-\wordvsep) coordinate[tee] (t3)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\ifsimeckshowkey
% \draw (R|-t1) coordinate (x1); % key
\fi
\draw (MM|-t2) coordinate[andalt] (a1);
\draw (MM|-t3) coordinate[xor] (x2); % mid
\draw (R|-t3) coordinate[xor] (x3); % feistel
% \draw (R|-t2) coordinate[xor] (x4);
\draw (LM|-t2) node[state] (LM2) {\SimeckHalfState{#4}};
\draw (LM|-t3) node[state] (LM3) {\SimeckHalfState{#5}};
\ifsimeckshowkey
% \draw (RM|-t1) node[state] (RM1) {\SimeckHalfState{#6}};
\fi
\draw (RM|-t2) node[state] (RM2) {\SimeckHalfState{#6}};
\draw (RM|-t3) node[state] (RM3) {\SimeckHalfState{#7}};
\draw (t2) -- node[above] {\tiny{$\lll \rotA$}} (LM2);
\draw (t3) -- node[above] {\tiny{$\lll \rotB$}} (LM3);
\begin{scope}[rounded corners=2pt,->]
\ifsimeckshowkey
% \draw (RM1) -- node[below,simecklabelstyle] {$K_{#1}$} (x1);
\fi
\draw (LM2) -- (a1);
\draw (t1) -| (a1);
\draw (a1) -- (x2);
% \draw (RM2) -- (x4);
% \draw[\ifsimeckcompact-\fi] (a1) -- (x2);
\draw (LM3) -- (x2);
\draw (x2) -- (RM3);
\draw (RM3) -- (x3);
\ifsimeckshowkey
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x3);
% \draw (x1) -- (x3);
\else
% \draw (Rhere|-RRhere.south) -- (x3);
\fi
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x3) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
}
\newcommand{\SimeckFinal}[3]{
\pgfmathsetmacro{\inputidx}{int(#1-1)}
\draw (LL|-here) node[state,label=right:$L_{\inputidx}$] (LLhere) {\SimeckHalfState{#2}};
\draw (RR|-here) node[state, label=left:$R_{\inputidx}$] (RRhere) {\SimeckHalfState{#3}};
}
\newcommand{\SimeckGap}{
\draw (L|-here) ++(0,-\wordvsep*2) coordinate (t0)
++(0,-0.6) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
}
\newcommand{\SimeckGapNew}[1]{
\pgfmathsetmacro{\x}{int(#1)}
\draw (L|-here) ++(0,-2*\wordvsep*\x) coordinate (t0)
++(0,0) coordinate (here)
++(0,0) coordinate (end);
}
\newcommand{\SimeckMergeU}{
\draw ($(R.east|-here) +(1.3*\halfword-1.45,-0.25)$) coordinate (l1);
\draw[dashed,rounded corners=0.2cm, color=red] (l1) rectangle ++(-6.5*\halfword,0.5);
\draw ($(l1) + (1.1,0.25)$) node[rot,fill=white] {\tiny{{merge}}} coordinate (merge);
\draw [->,rounded corners=4pt,red] ($(l1) +(0,0.25)$) -- ($(merge) + (-0.4,0)$);
\draw ($(R.east|-here) +(1.3*\halfword-1.45+2.3,-0.25)$) coordinate (r1);
\draw[dashed,rounded corners=0.2cm, color=red] (r1) rectangle ++(6.5*\halfword,0.5);
\draw [->,rounded corners=4pt,red] ($(r1) +(0,0.25)$) -- ($(merge) + (0.4,0.0)$);
\draw ($(r1) +(0,2.0*\wordvsep)$) coordinate (r2);
\draw[dashed,rounded corners=0.2cm, color=red] (r2) rectangle ++(6.5*\halfword,0.5);
\draw [<-,rounded corners=4pt,red] ($(r2) +(0,0.25)$) -| ($(merge) + (0,0.15)$);
}
\newcommand{\SimeckMergeL}{
\draw ($(R.east|-here) +(1.3*\halfword-1.45,-0.25)$) coordinate (l1);
\draw[dashed,rounded corners=0.2cm, color=red] (l1) rectangle ++(-6.5*\halfword,0.5);
\draw ($(l1) + (1.1,0.25)$) node[rot,fill=white] {\tiny{{merge}}} coordinate (merge);
\draw [->,rounded corners=4pt,red] ($(l1) +(0,0.25)$) -- ($(merge) + (-0.4,0)$);
\draw ($(R.east|-here) +(1.3*\halfword-1.45+2.3,-0.25)$) coordinate (r1);
\draw[dashed,rounded corners=0.2cm, color=red] (r1) rectangle ++(6.5*\halfword,0.5);
\draw [->,rounded corners=4pt,red] ($(r1) +(0,0.25)$) -- ($(merge) + (0.4,0.0)$);
\draw ($(r1) +(0,-2.0*\wordvsep)$) coordinate (r2);
\draw[dashed,rounded corners=0.2cm, color=red] (r2) rectangle ++(6.5*\halfword,0.5);
\draw [<-,rounded corners=4pt,red] ($(r2) +(0,0.25)$) -| ($(merge) + (0,-0.15)$);
}
\newcommand{\SimeckMerge}{
\draw ($(R.east|-here) +(1.3*\halfword-1.45,-0.25)$) coordinate (l1);
\draw ($(l1) +(0,-2.0*\wordvsep)$) coordinate (l2);
\draw[dashed,rounded corners=0.2cm, color=red] (l1) rectangle ++(-6.5*\halfword,0.5);
\draw[dashed,rounded corners=0.2cm, color=red] (l2) rectangle ++(-6.5*\halfword,0.5);
\draw ($(l1) + (1.1,-\wordvsep+0.25)$) node[rot,fill=white] {\tiny{{merge}}} coordinate (merge);
\draw [->,rounded corners=4pt,red] ($(l1) +(0,0.25)$) -| ($(merge) + (-0.1,0.15)$);
\draw [->,rounded corners=4pt,red] ($(l2) +(0,0.25)$) -| ($(merge) + (-0.1,-0.15)$);
\draw ($(R.east|-here) +(1.3*\halfword-1.45+2.3,-0.25)$) coordinate (r1);
\draw ($(r1) +(0,-2.0*\wordvsep)$) coordinate (r2);
\draw[dashed,rounded corners=0.2cm, color=red] (r1) rectangle ++(6.5*\halfword,0.5);
\draw[dashed,rounded corners=0.2cm, color=red] (r2) rectangle ++(6.5*\halfword,0.5);
\draw [<-,rounded corners=4pt,red] ($(r1) +(0,0.25)$) -| ($(merge) + (0.1,0.15)$);
\draw [<-,rounded corners=4pt,red] ($(r2) +(0,0.25)$) -| ($(merge) + (0.1,-0.15)$);
% \draw(R.east|-here) ++(1.5*\halfword,-0.8*\halfword) node[rot,fill=white] {\tiny{{merge}}} coordinate (t1);
% \draw [->,rounded corners=4pt,red] ($(R.east|-here) +(0.75*\halfword,0)$) -| ($(t1) + (0,0.2)$);
%
% \draw[dashed,rounded corners=0.2cm, color=red] (Uend) rectangle ++(-7*\halfword,0.5);
% \draw [->,rounded corners=4pt,red] ($(Uend) +(0,0.25)$) -| ($(t1) + (0,-0.2)$);
%
%\draw ($(R.east|-here) +(2.8*\halfword,-1.2)$) coordinate (Lstart);
%\draw ($(Lstart) +(0,-1.3*\halfword-1.45)$) coordinate (Ustart);
%\draw[dashed,rounded corners=0.2cm, color=red] (Lstart) rectangle ++(7*\halfword,0.5);
%\draw[->,rounded corners=4pt,red] ($(t1) + (0.2,0.2)$) |- ($(Lstart) +(0,0.25)$);
%
%\draw[dashed,rounded corners=0.2cm, color=red] (Ustart) rectangle ++(7*\halfword,0.5);
%\draw[->,rounded corners=4pt,red] ($(t1) + (0.2,-0.2)$) |- ($(Ustart) +(0,0.25)$);
% \node[rot,fill=white] at ($(t1)+ (\halfword,0)$) {\tiny{{merge}}};
}
%\node[rot,fill=white, rotate=90] at ($(breu) + (\dx/2,-\dy/2)$) {$\tiny{\cp{merge}}$};
%\draw[->,rounded corners=4pt] ($(breu) + (\dx/2,-\dy)$) |- ($(tlel1) + (0, -\lye/2 )$);
%\draw[->,rounded corners=4pt] ($(breu) + (\dx/2,-\dy)$) |- ($(breu1) + (0, \lye/2 )$);
%\draw[->,rounded corners=4pt] (u4) |- ($(breu) + (\dx/3,-\dy/2)$);
%\draw[->,rounded corners=4pt] (l1) |- ($(breu) + (\dx*2/3,-\dy/2)$);
\newcommand{\SimeckGaps}[1]{
\pgfmathsetmacro{\inputidx}{int(#1)}
\draw (L|-here) ++(0,-\wordvsep) coordinate (t0)
++(0,-0.6) coordinate (here)
++(0,.7*\bitdim) coordinate (end);
\draw (R|-t0) coordinate (x);
\draw[draw=none] (t0) -- node[fill=white,draw,rounded corners=1pt] {$\inputidx$ rounds Distinguisher} (x);
}
\newcommand{\SimeckRoundFunction}{
\draw (LL|-here) node[state,label=right:$L_{i}$] (LLhere) {\SimeckHalfState{}};
\draw (RR|-here) node[state, label=left:$R_{i}$] (RRhere) {\SimeckHalfState{}};
\draw (L|-here) ++(0,-\wordvsep) coordinate[tee] (t1)
++(0,-\wordvsep) coordinate[tee] (t2)
++(0,-\wordvsep) coordinate[tee] (t3)
++(0,-.3) coordinate (swapini)
++(0,-\wordvsep) coordinate (swapfin)
++(0,-.3) coordinate (here)
++(0,.5*\bitdim) coordinate (end);
\ifsimeckshowkey
\draw (R|-t1) coordinate[xor] (x1); % key
\fi
\draw (MM|-t2) coordinate[andalt] (a1);
\draw (MM|-t3) coordinate[xor] (x2); % mid
\draw (R|-t3) coordinate[xor] (x3); % feistel
\draw (LM|-t1) node[state] (LM1) {\SimeckHalfState{}};
\draw (LM|-t2) node[state] (LM2) {\SimeckHalfState{}};
\draw (LM|-t3) node[state] (LM3) {\SimeckHalfState{}};
\ifsimeckshowkey
\draw (RM|-t1) node[state] (RM1) {\SimeckHalfState{}};
\fi
\draw (RM|-t2) node[state] (RM2) {};
\draw (RM|-t3) node[state] (RM3) {\SimeckHalfState{}};
\draw (t1) -- (LM1);
\draw (t2) -- node[below,simecklabelstyle] {$\lll \rotA$} (LM2);
\draw (t3) -- node[below,simecklabelstyle] {$\lll \rotB$} (LM3);
\begin{scope}[rounded corners=2pt,->]
\ifsimeckshowkey
\draw (RM1) -- node[below,simecklabelstyle] {$K_{i}$} (x1);
\fi
\draw (LM1) -| (a1);
\draw (LM2) -- (a1);
\draw (a1) -- (x2);
% \draw (RM2) -- (x4);
% \draw[\ifsimeckcompact-\fi] (a1) -- (x2);
\draw (LM3) -- (x2);
\draw (x2) -- (RM3);
\draw (RM3) -- (x3);
\ifsimeckshowkey
\draw[\ifsimeckcompact-\fi] (Rhere|-RRhere.south) -- (x1);
\draw (x1) -- (x3);
\else
\draw (Rhere|-RRhere.south) -- (x3);
\fi
\draw (Lhere|-LLhere.south) -- (L|-swapini) -- (R|-swapfin) -- (R|-end) coordinate (Rhere);
\draw (x3) -- (R|-swapini) -- (L|-swapfin) -- (L|-end) coordinate (Lhere);
\end{scope}
\draw (LL|-here) node[state,label=right:$L_{i+1}$] (LLhere) {\SimeckHalfState{}};
\draw (RR|-here) node[state, label=left:$R_{i+1}$] (RRhere) {\SimeckHalfState{}};
}
\endinput