| 1 | #! /bin/sh |
| 2 | ### |
| 3 | ### Issue cards containing a bunch of keeper secrets |
| 4 | ### |
| 5 | ### (c) 2011 Mark Wooding |
| 6 | ### |
| 7 | |
| 8 | ###----- Licensing notice --------------------------------------------------- |
| 9 | ### |
| 10 | ### This program is free software; you can redistribute it and/or modify |
| 11 | ### it under the terms of the GNU General Public License as published by |
| 12 | ### the Free Software Foundation; either version 2 of the License, or |
| 13 | ### (at your option) any later version. |
| 14 | ### |
| 15 | ### This program is distributed in the hope that it will be useful, |
| 16 | ### but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ### GNU General Public License for more details. |
| 19 | ### |
| 20 | ### You should have received a copy of the GNU General Public License |
| 21 | ### along with this program; if not, write to the Free Software Foundation, |
| 22 | ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | |
| 24 | set -e |
| 25 | case "${KEYSLIB+t}" in t) ;; *) echo >&2 "$0: KEYSLIB unset"; exit 1 ;; esac |
| 26 | . "$KEYSLIB"/keyfunc.sh |
| 27 | |
| 28 | defhelp <<HELP |
| 29 | KEEPER [INDICES ...] |
| 30 | Typeset cards for a set of keeper secrets. |
| 31 | |
| 32 | This program writes a file KEEPER.ps which will contain private keys from the |
| 33 | keeper set KEEPER, specifically the keys with the given INDICES. Elements of |
| 34 | the list are either simple integers or ranges [LOW]-[HIGH]; if LOW is |
| 35 | omitted, it means 0, and if HIGH is omitted, it means the highest possible |
| 36 | index. If no INDICES are given then all secret keys are written. |
| 37 | |
| 38 | The public keys are found in $KEYS/keeper/KEEPER/I.pub; |
| 39 | private keys are read from KEEPER/I in the current directory. |
| 40 | HELP |
| 41 | dohelp |
| 42 | |
| 43 | ## Parse the command line. |
| 44 | case $# in 0) echo >&2 "$usage"; exit 1 ;; esac |
| 45 | keeper=$1; shift |
| 46 | checkword "keeper set label" "$keeper" |
| 47 | read n hunoz <$KEYS/keeper/$keeper/meta |
| 48 | |
| 49 | ## Build a colon-separated list of the indices we actually want. |
| 50 | want=: |
| 51 | case $# in 0) set 0- ;; esac |
| 52 | for range in "$@"; do |
| 53 | case "$range" in |
| 54 | *[!-0-9]* | *[!0-9]*-* | *-*[!0-9]*) |
| 55 | echo >&2 "$quis: bad index range \`$range'" |
| 56 | exit 1 |
| 57 | ;; |
| 58 | *-*) |
| 59 | low=${range%-*} high=${range#*-} |
| 60 | ;; |
| 61 | *) |
| 62 | low=$range high=$range |
| 63 | ;; |
| 64 | esac |
| 65 | case "$low" in ?*) ;; *) low=0 ;; esac |
| 66 | case "$high" in ?*) ;; *) high=$((n - 1)) ;; esac |
| 67 | if [ 0 -gt $low -o $low -gt $high -o $high -ge $n ]; then |
| 68 | echo >&2 "$quis: invalid index range \`$range'" |
| 69 | exit 1 |
| 70 | fi |
| 71 | i=$((low + 0)) |
| 72 | while [ $i -le $high ]; do |
| 73 | case $want in *:"$i":*) ;; *) want=$want$i: ;; esac |
| 74 | i=$((i + 1)) |
| 75 | done |
| 76 | done |
| 77 | |
| 78 | ## Start working on the output file. This will contain deep secrets, so |
| 79 | ## don't leave stuff easily readable. |
| 80 | tmp=$(mktmp); cleanup rmtmp |
| 81 | umask 077 |
| 82 | exec 3>$tmp/$keeper.tex |
| 83 | cat >&3 <<'EOF' |
| 84 | \documentclass[a4paper, landscape, 12pt]{article} |
| 85 | \usepackage[utf8]{inputenc} |
| 86 | \usepackage[T1]{fontenc} |
| 87 | \usepackage[palatino, helvetica, courier, maths = cmr]{mdwfonts} |
| 88 | \usepackage{graphicx} |
| 89 | |
| 90 | %% Report errors with enough context that we can debug them. |
| 91 | \errorcontextlines=999 |
| 92 | |
| 93 | %% Basic layout for the cards. We use the paragraph filling machinery, but |
| 94 | %% don't actually need most of the trimmings. |
| 95 | \parindent=0pt |
| 96 | \parfillskip=0pt |
| 97 | \pagestyle{empty} |
| 98 | |
| 99 | %% Page layout: try to use most of the page. The document class will already |
| 100 | %% have set up the paper size, but we do the rest here. |
| 101 | \hoffset=-1in \voffset=-1in |
| 102 | \oddsidemargin=20mm |
| 103 | \textwidth=\paperwidth \advance\textwidth by -2\oddsidemargin |
| 104 | \topmargin=20mm |
| 105 | \headheight=0pt \headsep=0pt |
| 106 | \textheight=\paperheight \advance\textheight by -2\topmargin |
| 107 | \AtBeginDocument{\special{papersize=\the\paperwidth,\the\paperheight}} |
| 108 | |
| 109 | %% Parameters for the cards and guide rules. |
| 110 | \newdimen\cardwd \cardwd=82mm |
| 111 | \newdimen\cardht \cardht=49mm |
| 112 | \newdimen\guidelen \guidelen=10mm |
| 113 | \newdimen\rulewd \rulewd=0.6pt |
| 114 | |
| 115 | %% Typesetting the secret as text. The macro \snarf TOKEN T0 T1 ... T7 |
| 116 | %% gathers T0 T1 ... T7 into a single argument and passes them to TOKEN, as |
| 117 | %% long as T0 is not \relax. We use this to process the secret text in a |
| 118 | %% continuation-passing style. |
| 119 | \def\snarf#1#2{% |
| 120 | \ifx#2\relax\let\next\empty% |
| 121 | \else\def\next{\snarfdo#1#2}% |
| 122 | \fi% |
| 123 | \next% |
| 124 | } |
| 125 | \def\snarfdo#1#2#3#4#5#6#7#8#9{#1{#2#3#4#5#6#7#8#9}} |
| 126 | |
| 127 | %% Print the left and right halves of the line, with a separator. Use boxes |
| 128 | %% for the lines so that TeX will work out the width of the enclosing vbox |
| 129 | %% for us. The basic usage is \line TEXT \relax ... \relax, with eight |
| 130 | %% \relax tokens: this is enough to complete both \snarf calls. |
| 131 | \def\line{\snarf\lineleft} |
| 132 | \def\lineleft#1{\hbox\bgroup#1 \snarf\lineright} |
| 133 | \def\lineright#1{#1\egroup\line} |
| 134 | |
| 135 | %% Typeset a card containing a secret. Usage is \card{INDEX}{SECRET}. |
| 136 | \def\card#1#2{% |
| 137 | %% |
| 138 | %% Make sure we're setting a paragraph. |
| 139 | \leavevmode% |
| 140 | %% |
| 141 | %% Initial material: a stretchy space on the left. |
| 142 | \hbox{}\nobreak\hfil% |
| 143 | %% |
| 144 | %% An alignment for the guide markers surrounding the actual card. |
| 145 | \vbox{\halign{&##\cr% |
| 146 | %% |
| 147 | %% Top left guides. |
| 148 | \vrule width \guidelen height \rulewd depth 0pt% |
| 149 | \vrule width \rulewd depth 0pt height \guidelen% |
| 150 | &% |
| 151 | %% |
| 152 | %% Top centre gap. |
| 153 | \hfil% |
| 154 | &% |
| 155 | %% |
| 156 | %% Top right guides. |
| 157 | \vrule width \rulewd depth 0pt height \guidelen% |
| 158 | \vrule width \guidelen height \rulewd depth 0pt% |
| 159 | \cr% |
| 160 | %% |
| 161 | %% Left gap. |
| 162 | &% |
| 163 | %% |
| 164 | %% The actual card. |
| 165 | \vbox to \cardht{% |
| 166 | %% |
| 167 | %% We actually do more or less sensible typesetting. TeX will set the |
| 168 | %% box width from the hsize, and we should leave a small margin all |
| 169 | %% around. |
| 170 | \parfillskip=0pt plus 1fil% |
| 171 | \leftskip=1em \rightskip=1em% |
| 172 | \hsize=\cardwd% |
| 173 | %% |
| 174 | %% The heading. |
| 175 | \hrule height 0pt \prevdepth = 0pt% |
| 176 | \medskip% |
| 177 | {\large\bfseries\textsf{\keeper} secret #1/\total}% |
| 178 | %% |
| 179 | %% The QR-code and the text of the secret. |
| 180 | \vfil% |
| 181 | $% |
| 182 | \vcenter{\hbox{\includegraphics[scale = 2.4]{#1.eps}}}% |
| 183 | \hfil% |
| 184 | \vcenter{\ttfamily% |
| 185 | \line#2% |
| 186 | \relax\relax\relax\relax\relax\relax\relax\relax% |
| 187 | }% |
| 188 | $% |
| 189 | %% |
| 190 | %% And we're done. |
| 191 | \vfil% |
| 192 | }% |
| 193 | &% |
| 194 | %% |
| 195 | %% Right gap. |
| 196 | \cr% |
| 197 | %% |
| 198 | %% Bottom left guides. |
| 199 | \vrule width \guidelen depth \rulewd height 0pt% |
| 200 | \vrule width \rulewd depth \guidelen height 0pt% |
| 201 | &% |
| 202 | %% Bottom centre gap. |
| 203 | \hfil% |
| 204 | &% |
| 205 | %% Bottom right guides. |
| 206 | \vrule width \rulewd depth \guidelen height 0pt% |
| 207 | \vrule width \guidelen depth \rulewd height 0pt% |
| 208 | \cr% |
| 209 | %% |
| 210 | %% Leave a small vertical space at the bottom to separate lines of cards. |
| 211 | \strut \cr% |
| 212 | }}% |
| 213 | %% |
| 214 | %% End material: a stretchy space to match the one at the start, and then |
| 215 | %% allow a break. |
| 216 | \nobreak\hfil\hbox{}% |
| 217 | \penalty0% |
| 218 | } |
| 219 | EOF |
| 220 | |
| 221 | ## Write the basic configuration stuff. |
| 222 | cat >&3 <<EOF |
| 223 | |
| 224 | %% General configuration for the cards. |
| 225 | \def\keeper{$keeper} |
| 226 | \def\total{$n} |
| 227 | EOF |
| 228 | |
| 229 | ## Start the document body. |
| 230 | cat >&3 <<'EOF' |
| 231 | |
| 232 | %% The actual content. |
| 233 | \begin{document} |
| 234 | EOF |
| 235 | |
| 236 | ## Work through the requested indices. |
| 237 | i=0 |
| 238 | while [ $i -lt $n ]; do |
| 239 | case $want in |
| 240 | *:"$i":*) |
| 241 | read secret <$keeper/$i |
| 242 | tr -d '\n' <$keeper/$i | qrencode -m0 -s1 -o$tmp/$i.png |
| 243 | convert $tmp/$i.png $tmp/$i.eps |
| 244 | cat >&3 <<EOF |
| 245 | \card{$i}{$secret} |
| 246 | EOF |
| 247 | esac |
| 248 | i=$((i + 1)) |
| 249 | done |
| 250 | |
| 251 | ## Wrap up and build the document. |
| 252 | cat >&3 <<'EOF' |
| 253 | \end{document} |
| 254 | EOF |
| 255 | exec 3>&- |
| 256 | if ! (cd $tmp |
| 257 | exec </dev/null >tex.out 2>&1 |
| 258 | latex $keeper.tex && dvips -o$keeper.ps $keeper.dvi); then |
| 259 | echo >&2 "$quis: document formatting failed" |
| 260 | sed >&2 's/^/| /' $tmp/tex.out |
| 261 | exit 1 |
| 262 | fi |
| 263 | cp $tmp/$keeper.ps . |
| 264 | |
| 265 | ###----- That's all, folks -------------------------------------------------- |