mail-mta/qmail/files/qmail-genrsacert.sh


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#!/bin/bash
# $Header: /var/cvsroot/gentoo-x86/mail-mta/qmail/files/qmail-genrsacert.sh,v 1.4 2005/06/12 19:35:43 hansmi Exp $
# Robin H. Johnson <robbat2@gentoo.org> - October 17, 2003
#
# This file generates the static temporary RSA keys needed for qmail to encrypt
# messages. It should be run from a crontab, once a day is ok on low load
# machines, but if you do lots of mail, once per hour is more reasonable if you
# do NOT create the rsa512.pem, qmail will generate it on the fly for each
# connection, which can be VERY slow.

if [ -z "${ROOT}" -o "${ROOT}" = "/" ]; then
	confdir=/var/qmail/control
else
	confdir=${ROOT}/var/qmail/control
fi

# the key should be 0600
# which is readable by qmaild only!
umaskvalue="0077"
uid="qmaild"
gid="qmail"

umask ${umaskvalue}

# This is a list with bits of the generated keys. They should
# be a power of 2 ideally and must be more than 64.
keys="512 1024"

for bits in ${keys}
do
	pemfile="${confdir}/rsa${bits}.pem"
	tmpfile="${confdir}/rsa${bits}.pem.tmp"

	# we need to make sure that all of the operations succeed
	/usr/bin/openssl genrsa -out ${tmpfile} ${bits} 2>/dev/null && \
	/bin/chown ${uid}:${gid} ${tmpfile} && \
	/bin/mv -f ${tmpfile} ${pemfile} || exit 1

	dhfile="${confdir}/dh${bits}.pem"
	dtmpfile="${confdir}/dh${bits}.pem.tmp"

	/usr/bin/openssl dhparam -2 -out ${dtmpfile} ${bits} 2>/dev/null && \
	/bin/chown ${uid}:${gid} ${dtmpfile} && \
	/bin/mv -f ${dtmpfile} ${dhfile} || exit 1
done