173 lines
5.0 KiB
Bash
Executable File
173 lines
5.0 KiB
Bash
Executable File
#!/bin/bash
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# _____ _ _
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# | __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
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# | __| _| -_| -_| . | . | | . | . | | -_|
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# |__| |_| |___|___|___|___|_|_|_|___|___|_|_|___|
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#
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# Freedom in the Cloud
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#
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# Generates an email client cert for use with IMAP clients
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# See:
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# http://strange.systems/certificate-based-auth-with-dovecot-sendmail
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# http://help.fabasoftfolio.com/index.php?topic=doc/Installation-and-Configuration-of-Fabasoft-Folio-IMAP-Service/client-certificate-authentication.htm
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# License
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# =======
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#
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# Copyright (C) 2015-2018 Bob Mottram <bob@freedombone.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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PROJECT_NAME='freedombone'
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export TEXTDOMAIN=${PROJECT_NAME}-clientcert
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export TEXTDOMAINDIR="/usr/share/locale"
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USERNAME=
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COUNTRY_CODE="US"
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AREA="Free Speech Zone"
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LOCATION="Freedomville"
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ORGANISATION="Freedombone"
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UNIT="Freedombone Unit"
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EXTENSIONS=""
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function show_help {
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echo ''
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echo $"${PROJECT_NAME}-clientcert -u [username]"
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echo ''
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echo $'Creates email certificates for use with IMAP clients'
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echo ''
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echo $' --help Show help'
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echo $' -u --username [name] Username'
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echo ''
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exit 0
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}
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while [ $# -gt 1 ]
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do
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key="$1"
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case $key in
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--help)
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show_help
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;;
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-u|--username)
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shift
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USERNAME="$1"
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;;
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*)
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# unknown option
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;;
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esac
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shift
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done
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if [ ! "$USERNAME" ]; then
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echo $'No username specified'
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exit 5748
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fi
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if [ ! -d "/home/$USERNAME" ]; then
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echo $"User $USERNAME not found"
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exit 76239
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fi
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if [ -d "/home/$USERNAME/emailcert" ]; then
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echo $'Client certs were already for created'
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exit 2953
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fi
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if [ ! -f /etc/dovecot/passwd-file ]; then
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touch /etc/dovecot/passwd-file
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fi
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# Add a user password
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if ! grep -q "$USERNAME:{plain}" /etc/dovecot/passwd-file; then
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echo "$USERNAME:{plain}::::::nopassword" >> /etc/dovecot/passwd-file
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fi
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chmod 600 /etc/dovecot/passwd-file
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# create a user cert
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"${PROJECT_NAME}-addcert" -h "$USERNAME" --nodh ""
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if [ ! -f "/etc/ssl/private/$USERNAME.key" ]; then
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echo $'User certificates were not created'
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rm -rf "/home/$USERNAME/emailcert"
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exit 74835
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fi
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# create a certificate request
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openssl req -new -sha256 -subj \
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"/O=$ORGANISATION/OU=$UNIT/C=$COUNTRY_CODE/ST=$AREA/L=$LOCATION/CN=$USERNAME" \
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-key "/etc/ssl/private/$USERNAME.key" \
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-out "/etc/ssl/requests/$USERNAME.csr"
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if [ ! -f "/etc/ssl/requests/$USERNAME.csr" ]; then
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echo $'Certificate request was not created'
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rm -rf "/home/$USERNAME/emailcert"
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exit 83520
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fi
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# sign the certificate request
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cd /etc/ssl || exit 742742542
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openssl ca -config /etc/ssl/dovecot-ca.cnf \
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-in "/etc/ssl/requests/$USERNAME.csr" \
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-out "/etc/ssl/certs/$USERNAME.cer"
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if [ ! -f "/etc/ssl/certs/$USERNAME.cer" ]; then
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echo $'Authentication certificate was not created'
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rm -rf "/home/$USERNAME/emailcert"
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exit 343569
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fi
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# move the cert to the user's home
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mkdir "/home/$USERNAME/emailcert"
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# shellcheck disable=SC2086
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mv /etc/ssl/certs/$USERNAME.cer /home/$USERNAME/emailcert
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cp "/etc/ssl/certs/dovecot.crt" "/home/$USERNAME/emailcert"
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cp "/etc/ssl/certs/ca-$HOSTNAME.crt" "/home/$USERNAME/emailcert"
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# shellcheck disable=SC2086
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mv /etc/ssl/private/$USERNAME.key /home/$USERNAME/emailcert
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# shellcheck disable=SC2086
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mv /etc/ssl/certs/$USERNAME.crt /home/$USERNAME/emailcert
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openssl pkcs12 -export -in "/home/$USERNAME/emailcert/$USERNAME.cer" \
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-out "/home/$USERNAME/emailcert/$USERNAME.p12" \
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-inkey "/home/$USERNAME/emailcert/$USERNAME.key" \
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-certfile "/home/$USERNAME/emailcert/ca-$HOSTNAME.crt" \
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-password pass:""
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# make an install script
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{ echo '#!/bin/bash';
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echo "sudo mv ca-$HOSTNAME.crt /etc/ssl/certs";
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echo "sudo mv $USERNAME.crt /etc/ssl/certs";
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echo "sudo mv dovecot.crt /etc/ssl/certs";
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echo "sudo mv $USERNAME.key /etc/ssl/private";
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echo 'exit 0'; } > "/home/$USERNAME/emailcert/install.sh"
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# set permissions for the user
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chmod -R 755 "/home/$USERNAME/emailcert"
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chown -R "$USERNAME":"$USERNAME" "/home/$USERNAME/emailcert"
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chmod +x "/home/$USERNAME/emailcert/install.sh"
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shred -zu "/etc/ssl/requests/$USERNAME.csr"
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echo $'Email authentication certificate created. You can obtain it on the client with:'
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echo ''
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echo " scp -P 2222 -r $USERNAME@$HOSTNAME:/home/$USERNAME/emailcert ~/"
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echo ''
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exit 0
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