Make sure you have working SSO install before applying these configurations

Enable SSL for LDAP

This example is done with self-signed certificate. It is always better to use publicly trusted certificate here.

Become root

sudo su -

Stop any IDS applications that is running in all instances.

systemctl stop wildfly.service 
systemctl stop ubilogin-server.service
systemctl stop ubilogin-directory.service

Create new self-signed certificate chain

# Create folder
mkdir -p ~/ssl

# Create certificate authority
openssl req -x509 \
            -sha512 \
            -days 3650 \
            -nodes \
            -newkey rsa:4096 \
            -subj "/CN=localhost/C=FI/L=Espoo" \
            -keyout cakey.pem -out cacert.pem

# Create server private key
openssl genrsa -out serverkey.pem 4096

# Generate certificate signging request
cat << EOF > servercsr.cnf
[ req ]
default_bits = 4096
prompt = no
default_md = sha512
req_extensions = req_ext
distinguished_name = dn

[ dn ]
C = FI
ST = Uusimaa
L = Espoo
O = Ubisecure Oy
OU = Engineering
CN = localhost

[ req_ext ]
subjectAltName = @alt_names

[ alt_names ]
DNS.1 = localhost
DNS.2 = $(hostname -s)
DNS.3 = $(hostname -f)

EOF

# Generate certificate signing request with previously created private key
openssl req \
        -new \
        -key serverkey.pem \
        -out servercsr.pem \
        -config servercsr.cnf

# Generate external certificate configuration
cat << EOF > cert.conf
authorityKeyIdentifier=keyid,issuer
basicConstraints=CA:FALSE
keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
subjectAltName = @alt_names

[alt_names]
DNS.1 = localhost
DNS.2 = $(hostname -s)
DNS.3 = $(hostname -f)

EOF

# Generate SSL certificate With self signed CA
openssl x509 -req \
    -in servercsr.pem \
    -CA cacert.pem \
    -CAkey cakey.pem \
    -CAcreateserial \
    -out servercert.pem \
    -days 3650 \
    -sha512 \
    -extfile \
    cert.conf

# View generated cert
openssl x509 -noout -in servercert.pem -text

Check keystore before import

# View all certificates
keytool -list \
        -storepass changeit \
        -keystore /usr/local/ubisecure/ubilogin-sso/ubilogin/custom/tomcat/keystore.pfx

##### Result
Keystore type: PKCS12
Keystore provider: SUN

Your keystore contains 1 entry

tomcat, Aug 28, 2023, PrivateKeyEntry, 
Certificate fingerprint (SHA-256): FF:BC:BE:57:69:2C:F0:35:06:8D:2D:F8:F3:42:D7:02:5F:1B:0D:47:29:1B:34:4D:FF:B5:DB:0F:1C:3B:4A:0A

Export the newly generated certificate to SSO tomcat

# Export serverkey
keytool -import \
        -trustcacerts \
        -keystore /usr/local/ubisecure/ubilogin-sso/ubilogin/custom/tomcat/keystore.pfx \
        -storepass changeit \
        -noprompt \
        -alias ubilogin-directory \
        -file servercert.pem

Check keystore after import

# View all certificates
keytool -list \
        -storepass changeit \
        -keystore /usr/local/ubisecure/ubilogin-sso/ubilogin/custom/tomcat/keystore.pfx

##### Result
Keystore type: PKCS12
Keystore provider: SUN

Your keystore contains 2 entries

openldap, Aug 28, 2023, trustedCertEntry, 
Certificate fingerprint (SHA-256): B9:08:F3:95:D7:4D:FD:ED:F7:E2:FC:8F:DE:81:B5:74:EE:2B:5F:2F:3C:96:9B:81:B8:06:3C:1E:3E:F0:89:0C
tomcat, Aug 28, 2023, PrivateKeyEntry, 
Certificate fingerprint (SHA-256): FF:BC:BE:57:69:2C:F0:35:06:8D:2D:F8:F3:42:D7:02:5F:1B:0D:47:29:1B:34:4D:FF:B5:DB:0F:1C:3B:4A:0A

Change ownership for generated files

# Copy generated certificate and serverkey
cp cacert.pem servercert.pem serverkey.pem /usr/local/ubisecure/ubilogin-sso/openldap/etc/openldap/

# Fix rights
chmod 600 /usr/local/ubisecure/ubilogin-sso/openldap/etc/openldap/cacert.pem
chmod 600 /usr/local/ubisecure/ubilogin-sso/openldap/etc/openldap/serverkey.pem
chmod 600 /usr/local/ubisecure/ubilogin-sso/openldap/etc/openldap/servercert.pem

# Fix ownership
chown -R ubilogin. /usr/local/ubisecure/ubilogin-sso/openldap/etc/openldap

Change unix.config so that it will use ldaps:// instead of ldap:// as a connection.

# Make a backup of existing unix.config
cp /usr/local/ubisecure/ubilogin-sso/ubilogin/unix.config \
   /usr/local/ubisecure/ubilogin-sso/ubilogin/unix.config.$(date +%Y%m%d%H%M%S)

# Apply change
sed -i 's/ldap.url=.*/ldap.url=ldaps:\/\/localhost:636/g' \
  /usr/local/ubisecure/ubilogin-sso/ubilogin/unix.config

Once done, run sso setup.sh again.

cd /usr/local/ubisecure/ubilogin-sso/ubilogin
./setup.sh

Once done, edit slapd.conf before updating ldap configuration

If any errors occurs, one can always run setup.sh again to reverse below changes to original defaults.

sed -i 's/#TLSCertificateFile/TLSCertificateFile/' \
  /usr/local/ubisecure/ubilogin-sso/ubilogin/ldap/openldap/slapd.conf
sed -i 's/#TLSCertificateKeyFile/TLSCertificateKeyFile/' \
  /usr/local/ubisecure/ubilogin-sso/ubilogin/ldap/openldap/slapd.conf
sed -i 's/#TLSCACertificateFile/TLSCACertificateFile/' \
  /usr/local/ubisecure/ubilogin-sso/ubilogin/ldap/openldap/slapd.conf

Reconfigure ldap

cd /usr/local/ubisecure/ubilogin-sso/ubilogin/ldap/openldap
export JAVA_HOME=/usr/lib/jvm/temurin-11-jdk # Make sure you have correct JDK
./install.sh

And finally update sso configurations

# Update configurations
cd /usr/local/ubisecure/ubilogin-sso/ubilogin/config/tomcat
./remove.sh
./install.sh

# Restart services
systemctl start ubilogin-directory.service
systemctl start ubilogin-server.service
systemctl start wildfly.service

Enable ldaps for SSO

Enable SSL for LDAP