Initial commit
This commit is contained in:
commit
130cd2711b
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#!/bin/bash
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# Copyright © 2021 Adrien Bourmault (neox@a-lec.org)
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# Copyright © 2021 Echolib (echolib@dismail.de)
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# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Affero General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
# This script is an example captcha script.
|
||||
# It takes the text to recognize in the captcha image as a parameter.
|
||||
# It return the image binary as a result. ejabberd support PNG, JPEG and GIF.
|
||||
|
||||
# The whole idea of the captcha script is to let server admins adapt it to
|
||||
# their own needs. The goal is to be able to make the captcha generation as
|
||||
# unique as possible, to make the captcha challenge difficult to bypass by
|
||||
# a bot.
|
||||
# Server admins are thus supposed to write and use their own captcha generators.
|
||||
|
||||
# This script relies on ImageMagick.
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# It is NOT compliant with ImageMagick forks like GraphicsMagick.
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INPUT=$1
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LENINPUT=${#INPUT}
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DIGITS=(zéros uns deux trois quatres cinqs six septs huits neufs dix)
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DIGIT=(zéro un deux trois quatre cinq six sept huit neuf dix)
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# ****************************************************************************
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#
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# Tools
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#
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# ****************************************************************************
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# Loops 10 times (should be enough) to check if a TARGET number is in INPUT
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GENERATE__NOTIN() {
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for i in {1..10}
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do
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FALSENBR=`seq 1 9 | sort -R | head -n 1`
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! [[ $INPUT =~ $FALSENBR ]] \
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&& break
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done
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}
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# ****************************************************************************
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#
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# Captcha shapes
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#
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# ****************************************************************************
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# REPLACEs a random number in INPUT by another one randomized
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REPLACE() {
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NAME="REPLACE"
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PLACE=`seq 1 6 | sort -R | head -n 1`
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TARGET=`echo "$INPUT" | head -c $PLACE | tail -c 1`
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GENERATE__NOTIN
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NAME+="-$FALSENBR-$TARGET"
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NEWINPUT=${INPUT//$TARGET/$FALSENBR}
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INSTRUCTIONS1="Recopiez ce nombre"
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INSTRUCTIONS2="en changeant les ${DIGITS[FALSENBR]} en ${DIGITS[TARGET]}"
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}
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# REVERSEs INPUT. Ask to Add first or last number in random.
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REVERSE() {
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NAME="REVERSE"
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RFL=`seq 1 2 | sort -R | head -n 1` # Rand First (1) or Last (2)
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ADDNBR=${DIGITS[ADDNBR]}
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for ((i=$LENINPUT-1;i>=0;i--))
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do
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NEWINPUT="$NEWINPUT${INPUT:$i:1}"
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done
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if (( $RFL == 1 ));then
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ADDNBR="${INPUT:0:1}"
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NAME+="_FIRST"
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NEWINPUT=${NEWINPUT:0:$LENINPUT-1} # Do not show first INPUT NBR
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INSTRUCTIONS1="Écrivez le chiffre ${DIGIT[$ADDNBR]} puis le nombre "
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INSTRUCTIONS2="en recopiant de DROITE à GAUCHE ←"
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else
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ADDNBR="${INPUT:$LENINPUT-1:1}"
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NAME+="_LAST"
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NEWINPUT=${NEWINPUT:1:$LENINPUT-1} # Do not show last INPUT NBR
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INSTRUCTIONS1="Recopiez de DROITE à GAUCHE ←"
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INSTRUCTIONS2="et terminez par le chiffre ${DIGIT[$ADDNBR]}"
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fi
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NAME+="-$ADDNBR"
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}
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# Add FALSE NBR to INPUT at three randomized place
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NOTIN() {
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NAME="NOTIN"
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GENERATE__NOTIN
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PLACE=(`seq 0 $((LENINPUT-1)) | sort -R | head -n 3 | sort -n`)
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for i in `seq 0 $((LENINPUT-1))`
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do
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(( $i == ${PLACE[0]} )) \
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&& NEWINPUT+="$FALSENBR"
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(( $i == ${PLACE[1]} )) \
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&& NEWINPUT+="$FALSENBR"
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(( $i == ${PLACE[2]} )) \
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&& NEWINPUT+="$FALSENBR"
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NEWINPUT="$NEWINPUT${INPUT:$i:1}"
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done
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NAME+="-$FALSENBR"
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INSTRUCTIONS1="Recopiez ce nombre sans les ${DIGITS[FALSENBR]}"
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}
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# Take a random NBR from INPUT. Calculate X
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CALCUL() {
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PLACE=`seq 1 $((LENINPUT)) | sort -R | head -n 1`
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TARGET=`echo "$INPUT" | head -c $PLACE | tail -c 1`
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NEWINPUT=${INPUT//$TARGET/X}
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RC=`seq 1 2 | sort -R | head -n 1` # 1 = - | 2 = +
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if (( $RC == 1 ));then
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FALSENBR=`seq $TARGET 10 | sort -R | head -n 1`
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RESUME=$(( FALSENBR - TARGET ))
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INSTRUCTIONS1="Calculez: ${DIGIT[FALSENBR]} moins ${DIGIT[RESUME]} et copiez"
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NAME="CALCULM-$FALSENBR-$RESUME"
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else
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FALSENBR=`seq 1 4 | sort -R | head -n 1`
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if (( $FALSENBR <= $TARGET ));then
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RESULT=$(( TARGET + FALSENBR ))
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RESUME=$(( TARGET - FALSENBR ))
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INSTRUCTIONS1="Calculez: ${DIGIT[FALSENBR]} plus ${DIGIT[RESUME]} et copiez"
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NAME="CALCULP-$FALSENBR-$RESUME"
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else
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RESULT=$(( FALSENBR - TARGET ))
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RESUME=$(( TARGET - RESULT ))
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INSTRUCTIONS1="Calculez: ${DIGIT[RESULT]} plus ${DIGIT[RESUME]} et copiez"
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NAME="CALCULP-$RESULT-$RESUME"
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fi
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fi
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INSTRUCTIONS2="en remplaçant chaque X par la somme"
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}
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# ****************************************************************************
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#
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# Random captcha shape choice (aka main)
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#
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# ****************************************************************************
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MODULES=(CALCUL NOTIN REPLACE REVERSE)
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RMODULE=`seq 0 $(( ${#MODULES[@]} - 1)) | sort -R | head -n 1`
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eval "${MODULES[RMODULE]}"
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TEXT="$NEWINPUT"
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CHAPRILURI=/var/lib/ejabberd/chapril_captchas/$(date "+%Y-%m-%d-%H%M%S")_${NAME}_${INPUT}.png
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convert -size 300x70 xc:none -pointsize 20 \
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\( -clone 0 -fill black \
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-stroke black -strokewidth 1 \
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-font Helvetica-Narrow -annotate "0x0+0+0" "\n $INSTRUCTIONS1" \
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-font Helvetica-Bold -annotate "0x0+0+22" "\n $TEXT" \
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-font Helvetica-Narrow -annotate "0x0+0+44" "\n $INSTRUCTIONS2" \
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-roll +$ROLL_X+0 \
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-wave "$WAVE1_AMPLITUDE"x"$WAVE1_LENGTH" \
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-roll -$ROLL_X+0 \) \
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-flatten -crop 300x70 +repage -quality 500 \
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-depth 11 png:"$CHAPRILURI"
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convert -size 300x70 xc:none -pointsize 20 \
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\( -clone 0 -fill black \
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-stroke black -strokewidth 1 \
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-font Helvetica-Narrow -annotate "0x0+0+0" "\n $INSTRUCTIONS1" \
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-font Helvetica-Bold -annotate "0x0+0+22" "\n $TEXT" \
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-font Helvetica-Narrow -annotate "0x0+0+44" "\n $INSTRUCTIONS2" \
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||||
-roll +$ROLL_X+0 \
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-wave "$WAVE1_AMPLITUDE"x"$WAVE1_LENGTH" \
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-roll -$ROLL_X+0 \) \
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-flatten -crop 300x70 +repage -quality 500 -depth 11 png:-
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Binary file not shown.
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After Width: | Height: | Size: 7.0 KiB |
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After Width: | Height: | Size: 4.7 KiB |
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After Width: | Height: | Size: 5.5 KiB |
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After Width: | Height: | Size: 7.3 KiB |
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After Width: | Height: | Size: 6.9 KiB |
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@ -0,0 +1,231 @@
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#!/bin/bash
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||||
|
||||
# Copyright © 2021 Adrien Bourmault (neox@a-lec.org)
|
||||
# Copyright © 2021 Echolib (echolib@dismail.de)
|
||||
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Affero General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
# This script is an example captcha script.
|
||||
# It takes the text to recognize in the captcha image as a parameter.
|
||||
# It return the image binary as a result. ejabberd support PNG, JPEG and GIF.
|
||||
|
||||
# The whole idea of the captcha script is to let server admins adapt it to
|
||||
# their own needs. The goal is to be able to make the captcha generation as
|
||||
# unique as possible, to make the captcha challenge difficult to bypass by
|
||||
# a bot.
|
||||
# Server admins are thus supposed to write and use their own captcha generators.
|
||||
|
||||
# This script relies on ImageMagick.
|
||||
# It is NOT compliant with ImageMagick forks like GraphicsMagick.
|
||||
|
||||
INPUT=$1
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||||
LENINPUT=${#INPUT}
|
||||
DIGITS=(zéros uns deux trois quatres cinqs six septs huits neufs dix)
|
||||
DIGIT=(zéro un deux trois quatre cinq six sept huit neuf dix)
|
||||
|
||||
|
||||
# ****************************************************************************
|
||||
#
|
||||
# Tools
|
||||
#
|
||||
# ****************************************************************************
|
||||
|
||||
|
||||
# Generate a number that is not in INPUT. Loop 10 times (should be enough)
|
||||
GENERATE__NOTIN() {
|
||||
for i in {1..10}
|
||||
do
|
||||
FALSENBR=`seq 1 9 | sort -R | head -n 1`
|
||||
! [[ $INPUT =~ $FALSENBR ]] \
|
||||
&& break
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||||
done
|
||||
}
|
||||
|
||||
|
||||
# ****************************************************************************
|
||||
#
|
||||
# Captcha shapes
|
||||
#
|
||||
# ****************************************************************************
|
||||
|
||||
|
||||
# REPLACEs a random number in INPUT by another one randomized
|
||||
REPLACE() {
|
||||
NAME="REPLACE"
|
||||
PLACE=`seq 1 6 | sort -R | head -n 1`
|
||||
TARGET=`echo "$INPUT" | head -c $PLACE | tail -c 1`
|
||||
|
||||
GENERATE__NOTIN
|
||||
NAME+="-$FALSENBR-$TARGET"
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NEWINPUT=${INPUT//$TARGET/$FALSENBR}
|
||||
INSTRUCTIONS1="Recopiez ce nombre"
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||||
INSTRUCTIONS2="en changeant les ${DIGITS[FALSENBR]} en ${DIGITS[TARGET]}"
|
||||
}
|
||||
|
||||
|
||||
# REVERSEs INPUT. Ask to Add first or last number in random.
|
||||
REVERSE() {
|
||||
NAME="REVERSE"
|
||||
RFL=`seq 1 2 | sort -R | head -n 1` # Rand First (1) or Last (2)
|
||||
ADDNBR=${DIGITS[ADDNBR]}
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||||
|
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for ((i=$LENINPUT-1;i>=0;i--))
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do
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NEWINPUT="$NEWINPUT${INPUT:$i:1}"
|
||||
done
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||||
|
||||
if (( $RFL == 1 ));then
|
||||
ADDNBR="${INPUT:0:1}"
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||||
NAME+="_FIRST"
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NEWINPUT=${NEWINPUT:0:$LENINPUT-1} # Do not show first INPUT NBR
|
||||
INSTRUCTIONS1="Écrivez le chiffre ${DIGIT[$ADDNBR]}"
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||||
INSTRUCTIONS2="et recopiez de DROITE à GAUCHE ←"
|
||||
else
|
||||
ADDNBR="${INPUT:$LENINPUT-1:1}"
|
||||
NAME+="_LAST"
|
||||
NEWINPUT=${NEWINPUT:1:$LENINPUT-1} # Do not show last INPUT NBR
|
||||
INSTRUCTIONS1="Recopiez de DROITE à GAUCHE ←"
|
||||
INSTRUCTIONS2="et terminez par le chiffre ${DIGIT[$ADDNBR]}"
|
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fi
|
||||
NAME+="-$ADDNBR"
|
||||
}
|
||||
|
||||
|
||||
# Add FALSE NBR to INPUT at three randomized place
|
||||
NOTIN() {
|
||||
NAME="NOTIN"
|
||||
GENERATE__NOTIN
|
||||
PLACE=(`seq 0 $((LENINPUT-1)) | sort -R | head -n 3 | sort -n`)
|
||||
for i in `seq 0 $((LENINPUT-1))`
|
||||
do
|
||||
(( $i == ${PLACE[0]} )) \
|
||||
&& NEWINPUT+="$FALSENBR"
|
||||
(( $i == ${PLACE[1]} )) \
|
||||
&& NEWINPUT+="$FALSENBR"
|
||||
(( $i == ${PLACE[2]} )) \
|
||||
&& NEWINPUT+="$FALSENBR"
|
||||
NEWINPUT="$NEWINPUT${INPUT:$i:1}"
|
||||
done
|
||||
NAME+="-$FALSENBR"
|
||||
INSTRUCTIONS1="Recopiez ce nombre sans les ${DIGITS[FALSENBR]}"
|
||||
}
|
||||
|
||||
|
||||
# Take a random NBR from INPUT. Calculate X
|
||||
CALCUL() {
|
||||
PLACE=`seq 1 $((LENINPUT)) | sort -R | head -n 1`
|
||||
TARGET=`echo "$INPUT" | head -c $PLACE | tail -c 1`
|
||||
NEWINPUT=${INPUT//$TARGET/X}
|
||||
|
||||
RC=`seq 1 2 | sort -R | head -n 1` # 1 = - | 2 = +
|
||||
if (( $RC == 1 ));then
|
||||
FALSENBR=`seq $TARGET 10 | sort -R | head -n 1`
|
||||
RESUME=$(( FALSENBR - TARGET ))
|
||||
INSTRUCTIONS1="Calculez: ${DIGIT[FALSENBR]} moins ${DIGIT[RESUME]} et copiez"
|
||||
NAME="CALCULM-$FALSENBR-$RESUME"
|
||||
else
|
||||
FALSENBR=`seq 1 4 | sort -R | head -n 1`
|
||||
if (( $FALSENBR <= $TARGET ));then
|
||||
RESULT=$(( TARGET + FALSENBR ))
|
||||
RESUME=$(( TARGET - FALSENBR ))
|
||||
INSTRUCTIONS1="Calculez: ${DIGIT[FALSENBR]} plus ${DIGIT[RESUME]} et copiez"
|
||||
NAME="CALCULP-$FALSENBR-$RESUME"
|
||||
else
|
||||
RESULT=$(( FALSENBR - TARGET ))
|
||||
RESUME=$(( TARGET - RESULT ))
|
||||
INSTRUCTIONS1="Calculez: ${DIGIT[RESULT]} plus ${DIGIT[RESUME]} et copiez"
|
||||
NAME="CALCULP-$RESULT-$RESUME"
|
||||
fi
|
||||
fi
|
||||
INSTRUCTIONS2="en remplaçant chaque X par la somme"
|
||||
}
|
||||
|
||||
# Sum 2 LAST numbers. Hide LAST or BEFORE LAST
|
||||
CALCEND() {
|
||||
END1=${INPUT:$LENINPUT-2:1}
|
||||
END2=${INPUT:$LENINPUT-1:1}
|
||||
ENDS=$(( END1 + END2 ))
|
||||
REND=`seq 1 2 | sort -R | head -n 1`
|
||||
if (( $REND == 1 ));then
|
||||
# Hide LAST
|
||||
NEWINPUT=${INPUT:0:LENINPUT-1}X
|
||||
NAME="END-${END1}X"
|
||||
else
|
||||
# Hide BEFORE LAST
|
||||
NEWINPUT=${INPUT:0:LENINPUT-2}X$END2
|
||||
NAME="END-X$END2"
|
||||
fi
|
||||
INSTRUCTIONS1="La somme des 2 derniers chiffres est $ENDS"
|
||||
INSTRUCTIONS2="Copiez en remplaçant X par sa valeur"
|
||||
}
|
||||
|
||||
# Replace 2 X (smaller > bigger | bigger > smaller)
|
||||
LEMO() {
|
||||
MAXNBR=${INPUT:0:1}
|
||||
MINNBR=${INPUT:0:1}
|
||||
for i in `seq 1 $((LENINPUT-1))`
|
||||
do
|
||||
(( ${INPUT:$i:1} > $MAXNBR )) \
|
||||
&& MAXNBR=${INPUT:$i:1}
|
||||
(( ${INPUT:$i:1} < $MINNBR )) \
|
||||
&& MINNBR=${INPUT:$i:1}
|
||||
done
|
||||
|
||||
for i in `seq 0 $((LENINPUT-1))`
|
||||
do
|
||||
if (( ${INPUT:$i:1} == $MINNBR ));then
|
||||
INSTRUCTIONS1="Remplacez les X par ${DIGIT[MAXNBR]} et ${DIGIT[MINNBR]}"
|
||||
INSTRUCTIONS2="! le plus PETIT en premier"
|
||||
NAME="LEMO-$MINNBR-$MAXNBR"
|
||||
break
|
||||
elif (( ${INPUT:$i:1} == $MAXNBR ));then
|
||||
INSTRUCTIONS1="Remplacez les X par ${DIGIT[MINNBR]} et ${DIGIT[MAXNBR]}"
|
||||
INSTRUCTIONS2="! Le plus GRAND en premier"
|
||||
NAME="LEMO-$MAXNBR-$MINNBR"
|
||||
break
|
||||
fi
|
||||
done
|
||||
|
||||
NEWINPUT=`echo $INPUT | sed "s/$MINNBR/X/"`
|
||||
NEWINPUT=`echo $NEWINPUT | sed "s/$MAXNBR/X/"`
|
||||
}
|
||||
|
||||
# ****************************************************************************
|
||||
#
|
||||
# Random captcha shape choice (aka main)
|
||||
#
|
||||
# ****************************************************************************
|
||||
|
||||
MODULES=(CALCUL CALCEND LEMO NOTIN REPLACE REVERSE)
|
||||
RMODULE=`seq 0 $(( ${#MODULES[@]} - 1)) | sort -R | head -n 1`
|
||||
eval "${MODULES[RMODULE]}"
|
||||
|
||||
TEXT="$NEWINPUT"
|
||||
DATE="$(date "+%Y-%m-%d-%H%M%S")"
|
||||
CHAPRILURI=/var/lib/ejabberd/chapril_captchas/${DATE}_${NAME}_${INPUT}.png
|
||||
|
||||
convert -size 300x70 xc:none -pointsize 20 \
|
||||
\( -clone 0 -fill black \
|
||||
-stroke black -strokewidth 1 \
|
||||
-font Helvetica-Narrow -annotate "0x0+0+0" "\n $INSTRUCTIONS1" \
|
||||
-font Helvetica-Bold -annotate "0x0+0+22" "\n $TEXT" \
|
||||
-font Helvetica-Narrow -annotate "0x0+0+44" "\n $INSTRUCTIONS2" \
|
||||
-roll +$ROLL_X+0 \
|
||||
-wave "$WAVE1_AMPLITUDE"x"$WAVE1_LENGTH" \
|
||||
-roll -$ROLL_X+0 \) \
|
||||
-flatten -crop 300x70 +repage -quality 500 \
|
||||
-depth 11 png:"$CHAPRILURI"
|
||||
|
||||
convert -size 300x70 xc:none -pointsize 20 \
|
||||
\( -clone 0 -fill black \
|
||||
-stroke black -strokewidth 1 \
|
||||
-font Helvetica-Narrow -annotate "0x0+0+0" "\n $INSTRUCTIONS1" \
|
||||
-font Helvetica-Bold -annotate "0x0+0+22" "\n $TEXT" \
|
||||
-font Helvetica-Narrow -annotate "0x0+0+44" "\n $INSTRUCTIONS2" \
|
||||
-roll +$ROLL_X+0 \
|
||||
-wave "$WAVE1_AMPLITUDE"x"$WAVE1_LENGTH" \
|
||||
-roll -$ROLL_X+0 \) \
|
||||
-flatten -crop 300x70 +repage -quality 500 -depth 11 png:-
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
#! /bin/bash
|
||||
|
||||
dates=$(zcat /var/log/ejabberd/ejabberd* 2> /dev/null | grep "was registered" \
|
||||
| cut -d[ -f 1 | cut -c 1-16)
|
||||
|
||||
SAVEIFS=$IFS # Save current IFS
|
||||
IFS=$'\n' # Change IFS to new line
|
||||
|
||||
dates=($dates) # Split to array
|
||||
IFS=$SAVEIFS # Restore IFS
|
||||
|
||||
greppattern=""
|
||||
|
||||
for (( i=0; i<${#dates[@]}; i++ ))
|
||||
do
|
||||
greppattern="$greppattern -e \"$(echo ${dates[$i]})\""
|
||||
done
|
||||
|
||||
#echo -e ${greppattern}
|
||||
|
||||
grepcommand="ls -lt --full-time /var/lib/ejabberd/chapril_captchas | grep $greppattern | cut -d ' ' -f 9"
|
||||
|
||||
eval $grepcommand
|
||||
|
|
@ -0,0 +1,43 @@
|
|||
# Méthodes de génération de captcha pour ejabberd 2x.x
|
||||
|
||||
## Réalisées dans le cadre du service XMPP du Chapril
|
||||
|
||||
### Concept
|
||||
|
||||
L'idée derrière ces méthodes de captchas est d'abord la simplicité de lecture pour l'utilisateur:
|
||||
- Pas de déformation du texte
|
||||
- Pas de coloration du texte
|
||||
- Ecrit en français sous la forme d'une consigne se voulant "simple" tout en étant difficile à attaquer par force brute par un bot
|
||||
- Compatible avec le système de génération de captcha de ejabberd (la XEP 0158)
|
||||
|
||||
### Exemples
|
||||
|
||||
Différentes méthodes sont utilisées.
|
||||
|
||||
#### Remplacement (REPLACE)
|
||||
|
||||
Une seule forme est disponible:
|
||||
|
||||
|
||||
|
||||
#### Inversion (REVERSE)
|
||||
|
||||
Deux formes sont disponibles:
|
||||
|
||||
|
||||
|
||||
ou encore
|
||||
|
||||
|
||||
|
||||
#### Intrus (NOTIN)
|
||||
|
||||
Une seule forme est disponible:
|
||||
|
||||
|
||||
|
||||
#### Calcul (CALCUL)
|
||||
|
||||
Une seule forme est disponible:
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
#!/bin/bash
|
||||
|
||||
# This script relies on ImageMagick.
|
||||
# It is NOT compliant with ImageMagick forks like GraphicsMagick.
|
||||
|
||||
RAND_ANGLE=$1
|
||||
RAND_ITALIC=$2
|
||||
INPUT=$3
|
||||
SOLUTION=$4
|
||||
|
||||
convert -size 300x60 xc:none -pointsize 20 \
|
||||
\( -clone 0 -fill black \
|
||||
-stroke black -strokewidth 1 \
|
||||
-annotate "${RAND_ANGLE}x${RAND_ITALIC}+0+0" "\n $INPUT" \
|
||||
-roll +$ROLL_X+0 \
|
||||
-wave "$WAVE1_AMPLITUDE"x"$WAVE1_LENGTH" \
|
||||
-roll -$ROLL_X+0 \) \
|
||||
-flatten -crop 300x60 +repage -quality 500 -depth 11 png:"/var/tmp/captcha/${SOLUTION}_$(date "+%Y-%m-%d-%H%M%S").png"
|
||||
Loading…
Reference in New Issue