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|
#!/bin/bash
verwendung() {
>&2 echo 'sendmailadvanced encrypts emails and generates stamps either in situ or in a pipe. For that it uses hashcash and gnupg.'
>&2 echo ''
>&2 echo 'Usage: sendmailadvanced [OPTIONS]'
>&2 echo ' -h,--hook=hook activate hook'
>&2 echo ' -i,--inline=file enhance email file in situ.'
>&2 echo ' "--inline -" has the same effect as "-t".'
>&2 echo ' Conflicts with -t|--no-inline.'
>&2 echo ' -t,--no-inline enhance email from stdin to stdout.'
>&2 echo ' Conflicts with -i|--inline.'
>&2 echo ' -e,--[no-]encrypt do (not) encrypt'
>&2 echo ' -s,--[no-]stamp do (not) stamp'
>&2 echo \
'#HELPTEXT# #'
exit 1
}
neueAdressaten() {
oldIFS="${IFS}"
IFS=','
for adressat in ${adressatenString}
do
if [[ "${adressat}" == *"<"*">"* ]]
then
adressat="${adressat#*<}"
adressat="${adressat%>*}"
fi
adressat="$(
echo "${adressat}" | \
tr -d "[:space:]"
)"
echo "${adressat}" | grep -q "\S" || continue
adressaten["${adressat}"]=1
done
adressatenString=""
IFS="${oldIFS}"
}
stempeln() {
hashcash -b ${hashcash_bits} -Xm "${!adressaten[@]}"
}
gpgAdressaten() {
for adressat in "${!adressaten[@]}"
do
if \
(
gpg --with-colons --list-public-keys "${adressat}" | \
grep '^uid:[mfuw]:' | \
cut -d: -f10 | \
tr '<>' '\n' | \
sort -u
echo "${adressat}"
) | \
sort | \
uniq -d | \
grep -q '\S'
then
echo -n "-r ${adressat} "
else
echo -n "-r ${gpg_recipient} "
fi
done
}
datei=""
encrypt=true
stamp=true
dForced=false
eForced=false
sForced=false
if [ -r #ETCDIR#/sendmailadvanced.conf ]
then
. #ETCDIR#/sendmailadvanced.conf
else
for konfig in $(readlink -f "$0").conf $(find . -name sendmailadvanced.conf 2> /dev/null)
do
[ -r "${konfig}" ] || continue
. "${konfig}"
break
done
fi
gpg --list-keys "${gpg_recipient}" &> /dev/null || encrypt=false
which hashcash &> /dev/null || stamp=false
eval set -- "$(getopt -o eh:i:st --long encrypt,no-encrypt,hook:,help,inline:,no-inline,stamp,no-stamp,version -n "$(basename "$0")" -- "$@" || echo verwendung)"
while true
do
case "$1" in
-h|--hook)
shift
hooks[${#hooks[@]}]="$1"
;;
--help)
verwendung 0
;;
--version)
echo '#VERSION#'
exit 0
;;
-i|--inline)
${dForced} && verwendung
shift
datei="$1"
[ "${datei}" == "-" ] && datei=""
dForced=true
;;
-t|--no-inline)
${dForced} && verwendung
datei=""
dForced=true
;;
-e|--encrypt)
${eForced} && verwendung
encrypt=true
eForced=true
;;
--no-encrypt)
${eForced} && verwendung
encrypt=false
eForced=true
;;
-s|--stamp)
${sForced} && verwendung
stamp=true
sForced=true
;;
--no-stamp)
${sForced} && verwendung
stamp=false
sForced=true
;;
--)
shift
break
;;
*)
>&2 echo "FEHLER: Verstehe Option \"$1\" doch nicht! Ich beende."
verwendung
;;
esac
shift
done
[ $# -ne 0 ] && verwendung
MAILER="cantfind"
for executable in sendmail msmtp
do
for prefix in #BINDIR# /usr/bin /usr/sbin /bin /sbin
do
[ "${MAILER}" == "cantfind" ] && [ -x ${prefix}/${executable} ] && MAILER="${prefix}/${executable}"
done
done
if [ -z "${datei}" ] && [ "${MAILER}" == "cantfind" ]
then
>&2 echo "ERROR: Can't find suitable mailer."
exit 1
fi
(
[ -z "${datei}" ] && cat || cat "${datei}"
) | \
(
IFS=''
adressatenString=""
unset adressaten
declare -A adressaten
adressatenSammeln=false
while read -r zeile
do
echo "${zeile}" | grep -q "\S" || break
s="${zeile}"
if [ "${s:0:3}" == "To:" ] || [ "${s:0:3}" == "Cc:" ]
then
adressatenSammeln=true
s=" ,${s:4}"
fi
if [ ! "${s:0:1}" == " " ]
then
${adressatenSammeln} && neueAdressaten
adressatenSammeln=false
fi
${adressatenSammeln} && adressatenString="${adressatenString}${s}"
echo "${zeile}"
done
${stamp} && stempeln
echo "${zeile}"
(
for hookParam in "${hooks[@]}"
do
body_header_hook "${hookParam}"
done
cat
for hookParam in "${hooks[@]}"
do
body_footer_hook "${hookParam}"
done
) | \
(
${encrypt} && gpg -e -a -s -r $(gpgAdressaten) || cat
)
) | \
(
if [ -z "${datei}" ]
then
${MAILER} -t
else
tmpFile="$(mktemp)"
cat > "${tmpFile}"
cat "${tmpFile}" > "${datei}"
rm -f "${tmpFile}"
fi
)
|
