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#!/bin/sh
# based on doc/mkcert.sh
# if ssl disabled then lets just exit
doveconf ssl 2>/dev/null | grep -Eq '(yes|required)' || exit 0
# Generates a self-signed certificate.
OPENSSL=${OPENSSL-openssl}
SSLDIR=${SSLDIR-/etc/ssl/dovecot}
OPENSSLCONFIG=${OPENSSLCONFIG-/etc/dovecot/dovecot-openssl.cnf}
CERTDIR=$SSLDIR
KEYDIR=$SSLDIR
# parse cert and key file from dovecot.conf (1.2) for upgraders
dovecot_conf=/etc/dovecot/dovecot.conf
ssl_cert_file=
ssl_key_file=
if [ -r "$dovecot_conf" ]; then
ssl_cert_file=$(awk -F'[[:space:]]*=[[:space:]]*' '/^ssl_cert_file/ { print $2}' $dovecot_conf)
ssl_key_file=$(awk -F'[[:space:]]*=[[:space:]]*' '/^ssl_key_file/ { print $2}' $dovecot_conf)
fi
# check if we have ssl_cert and/or key (for dovecot-2.0+)
# try expand the cert/key itself and if found, lets just keep it
[ -n "$(doveconf -x ssl_cert 2>/dev/null)" ] && exit 0
[ -n "$(doveconf -x ssl_key 2>/dev/null)" ] && exit 0
[ -z "$ssl_cert_file" ] && ssl_cert_file=$(doveconf ssl_cert | sed 's/.*= <//')
[ -z "$ssl_key_file" ] && ssl_key_file=$(doveconf ssl_key | sed 's/.*= <//')
CERTFILE=${ssl_cert_file:-$CERTDIR/server.pem}
KEYFILE=${ssl_key_file:-$KEYDIR/server.key}
if [ -e "$CERTFILE" ]; then
echo "Keeping existing $CERTFILE"
exit 0
fi
if [ -e "$KEYFILE" ]; then
echo "Keeping existing $KEYFILE"
exit 0
fi
if [ ! -c /dev/urandom ] && [ ! -c /dev/random ]; then
echo "No /dev/urandom or /dev/random so ssl cert not created"
exit 1
fi
$OPENSSL req -new -x509 -nodes -config $OPENSSLCONFIG -out $CERTFILE -keyout $KEYFILE -days 365 || exit 2
chmod 0600 $KEYFILE
echo
$OPENSSL x509 -subject -fingerprint -noout -in $CERTFILE || exit 2
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