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Change captcha.sh to not depend on bash (thanks to Konstantin Khomoutov)(EJAB-1105)
SVN Revision: 2749
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@ -351,7 +351,7 @@ GNU Make
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</LI><LI CLASS="li-itemize">Erlang pgsql library. Optional. For PostgreSQL authentication or storage. See section <A HREF="#compilepgsql">3.2.3</A>.
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</LI><LI CLASS="li-itemize">PAM library. Optional. For Pluggable Authentication Modules (PAM). See section <A HREF="#pam">3.1.4</A>.
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</LI><LI CLASS="li-itemize">GNU Iconv 1.8 or higher, for the IRC Transport (mod_irc). Optional. Not needed on systems with GNU Libc. See section <A HREF="#modirc">3.3.8</A>.
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</LI><LI CLASS="li-itemize">ImageMagick’s Convert program, and Bash. Optional. For CAPTCHA challenges. See section <A HREF="#captcha">3.1.8</A>.
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</LI><LI CLASS="li-itemize">ImageMagick’s Convert program. Optional. For CAPTCHA challenges. See section <A HREF="#captcha">3.1.8</A>.
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</LI><LI CLASS="li-itemize">exmpp 0.9.1 or higher. Optional. For import/export user data with <A HREF="http://xmpp.org/extensions/xep-0227.html">XEP-0227</A> XML files.
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</LI></UL><P> <A NAME="download"></A> </P><!--TOC subsection Download Source Code-->
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<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc10">2.4.2</A>  <A HREF="#download">Download Source Code</A></H3><!--SEC END --><P> <A NAME="download"></A>
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@ -1243,7 +1243,7 @@ In order to take effect there must be a translation file
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<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc29">3.1.8</A>  <A HREF="#captcha">CAPTCHA</A></H3><!--SEC END --><P> <A NAME="captcha"></A>
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</P><P>Some <TT>ejabberd</TT> modules can be configured to require a CAPTCHA challenge on certain actions.
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If the client does not support CAPTCHA Forms (<A HREF="http://xmpp.org/extensions/xep-0158.html">XEP-0158</A>),
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a web link is provided so the user can fill the challenge in a web browser.</P><P>An example Bash script is provided that generates the image
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a web link is provided so the user can fill the challenge in a web browser.</P><P>An example script is provided that generates the image
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using ImageMagick’s Convert program.</P><P>The configurable options are:
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</P><DL CLASS="description"><DT CLASS="dt-description">
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<B><TT>{captcha_cmd, Path}</TT></B></DT><DD CLASS="dd-description">
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@ -315,7 +315,7 @@ To compile \ejabberd{} on a `Unix-like' operating system, you need:
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\item Erlang pgsql library. Optional. For PostgreSQL authentication or storage. See section \ref{compilepgsql}.
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\item PAM library. Optional. For Pluggable Authentication Modules (PAM). See section \ref{pam}.
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\item GNU Iconv 1.8 or higher, for the IRC Transport (mod\_irc). Optional. Not needed on systems with GNU Libc. See section \ref{modirc}.
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\item ImageMagick's Convert program, and Bash. Optional. For CAPTCHA challenges. See section \ref{captcha}.
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\item ImageMagick's Convert program. Optional. For CAPTCHA challenges. See section \ref{captcha}.
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\item exmpp 0.9.1 or higher. Optional. For import/export user data with \xepref{0227} XML files.
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\end{itemize}
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@ -1546,7 +1546,7 @@ Some \ejabberd{} modules can be configured to require a CAPTCHA challenge on cer
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If the client does not support CAPTCHA Forms (\xepref{0158}),
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a web link is provided so the user can fill the challenge in a web browser.
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An example Bash script is provided that generates the image
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An example script is provided that generates the image
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using ImageMagick's Convert program.
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The configurable options are:
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@ -1,35 +1,70 @@
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#!/bin/bash
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#!/bin/sh
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INPUT=$1
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WAVE1_AMPLITUDE=$((2 + $RANDOM % 5))
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WAVE1_LENGTH=$((50 + $RANDOM % 25))
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WAVE2_AMPLITUDE=$((2 + $RANDOM % 5))
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WAVE2_LENGTH=$((50 + $RANDOM % 25))
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WAVE3_AMPLITUDE=$((2 + $RANDOM % 5))
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WAVE3_LENGTH=$((50 + $RANDOM % 25))
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W1_LINE_START_Y=$((10 + $RANDOM % 40))
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W1_LINE_STOP_Y=$((10 + $RANDOM % 40))
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W2_LINE_START_Y=$((10 + $RANDOM % 40))
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W2_LINE_STOP_Y=$((10 + $RANDOM % 40))
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W3_LINE_START_Y=$((10 + $RANDOM % 40))
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W3_LINE_STOP_Y=$((10 + $RANDOM % 40))
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if test -n ${BASH_VERSION:-''} ; then
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get_random ()
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{
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R=$RANDOM
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}
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else
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for n in `od -A n -t u2 -N 48 /dev/urandom`; do RL="$RL$n "; done
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get_random ()
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{
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R=${RL%% *}
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RL=${RL#* }
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}
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fi
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B1_LINE_START_Y=$(($RANDOM % 40))
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B1_LINE_STOP_Y=$(($RANDOM % 40))
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B2_LINE_START_Y=$(($RANDOM % 40))
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B2_LINE_STOP_Y=$(($RANDOM % 40))
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#B3_LINE_START_Y=$(($RANDOM % 40))
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#B3_LINE_STOP_Y=$(($RANDOM % 40))
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get_random
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WAVE1_AMPLITUDE=$((2 + $R % 5))
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get_random
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WAVE1_LENGTH=$((50 + $R % 25))
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get_random
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WAVE2_AMPLITUDE=$((2 + $R % 5))
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get_random
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WAVE2_LENGTH=$((50 + $R % 25))
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get_random
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WAVE3_AMPLITUDE=$((2 + $R % 5))
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get_random
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WAVE3_LENGTH=$((50 + $R % 25))
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get_random
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W1_LINE_START_Y=$((10 + $R % 40))
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get_random
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W1_LINE_STOP_Y=$((10 + $R % 40))
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get_random
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W2_LINE_START_Y=$((10 + $R % 40))
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get_random
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W2_LINE_STOP_Y=$((10 + $R % 40))
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get_random
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W3_LINE_START_Y=$((10 + $R % 40))
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get_random
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W3_LINE_STOP_Y=$((10 + $R % 40))
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B1_LINE_START_X=$(($RANDOM % 20))
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B1_LINE_STOP_X=$((100 + $RANDOM % 40))
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B2_LINE_START_X=$(($RANDOM % 20))
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B2_LINE_STOP_X=$((100 + $RANDOM % 40))
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#B3_LINE_START_X=$(($RANDOM % 20))
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#B3_LINE_STOP_X=$((100 + $RANDOM % 40))
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get_random
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B1_LINE_START_Y=$(($R % 40))
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get_random
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B1_LINE_STOP_Y=$(($R % 40))
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get_random
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B2_LINE_START_Y=$(($R % 40))
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get_random
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B2_LINE_STOP_Y=$(($R % 40))
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#B3_LINE_START_Y=$(($R % 40))
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#B3_LINE_STOP_Y=$(($R % 40))
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ROLL_X=$(($RANDOM % 40))
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get_random
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B1_LINE_START_X=$(($R % 20))
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get_random
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B1_LINE_STOP_X=$((100 + $R % 40))
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get_random
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B2_LINE_START_X=$(($R % 20))
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get_random
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B2_LINE_STOP_X=$((100 + $R % 40))
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#B3_LINE_START_X=$(($R % 20))
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#B3_LINE_STOP_X=$((100 + $R % 40))
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get_random
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ROLL_X=$(($R % 40))
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convert -size 180x60 xc:none -pointsize 40 \
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\( -clone 0 -fill white \
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