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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 -------------------------------------------------- |