+#!/bin/sh
+
+# Copyright (c) 2019 AT&T Intellectual Property.
+# Copyright (c) 2019 Nokia.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+dnBase=${CERT_DN:-'/C=US/O=O-RAN Alliance/OU=O-RAN Software Community'}
+keyBits=${KEY_BITS:-4096}
+
+CAHome=${CA_DIR:-'/pki'}
+CADays=${CA_CERT_EXPIRY:-9125}
+CAKey=${CAHome}/${CA_KEY_NAME:-ca.key.pem}
+CACert=${CAHome}/${CA_CERT_NAME:-ca.cert.pem}
+#
+CertHome=${CERT_DIR:-$CAHome}
+#
+TillerDays=${TILLER_CERT_EXPIRY:-3650}
+TillerKey=${CertHome}/${TILLER_KEY_NAME:-tiller.key.pem}
+TillerCert=${CertHome}/${TILLER_CERT_NAME:-tiller.cert.pem}
+TillerCN=${TILLER_CN:-tiller}
+#
+HelmDays=${HELM_CERT_EXPIRY:-3650}
+HelmKey=${CertHome}/${HELM_KEY_NAME:-helm.key.pem}
+HelmCert=${CertHome}/${HELM_CERT_NAME:-helm.cert.pem}
+HelmCN=${HELM_CN:-helm}
+
+# 1. CA
+if [ ! -d ${CAHome} ]; then
+ mkdir -p ${CAHome}
+fi
+if [ ! -f ${CAKey} ]; then
+ openssl genrsa -out ${CAKey} ${keyBits}
+fi
+if [ ! -f ${CACert} ]; then
+ openssl req -new -x509 -extensions v3_ca -sha256 -days ${CADays} \
+ -key ${CAKey} \
+ -out ${CACert} \
+ -subj "${dnBase}"
+fi
+
+# 2. tiller server cert
+if [ ! -f ${TillerKey} ]; then
+ openssl genrsa -out ${TillerKey} ${keyBits}
+fi
+if [ ! -f ${TillerCert} ]; then
+ CSR=`mktemp`
+ openssl req -new -sha256 \
+ -key ${TillerKey} \
+ -out ${CSR} \
+ -subj "${dnBase}/CN=${TillerCN}"
+ openssl x509 -req -CAcreateserial -days ${TillerDays} \
+ -CA ${CACert} \
+ -CAkey ${CAKey} \
+ -in ${CSR} \
+ -out ${TillerCert}
+fi
+
+# 3. helm client cert
+if [ ! -f ${HelmKey} ]; then
+ openssl genrsa -out ${HelmKey} ${keyBits}
+fi
+if [ ! -f ${HelmCert} ]; then
+ CSR=`mktemp`
+ openssl req -new -sha256 \
+ -key ${HelmKey} \
+ -out ${CSR} \
+ -subj "${dnBase}/CN=${HelmCN}"
+ openssl x509 -req -CAcreateserial -days ${HelmDays} \
+ -CA ${CACert} \
+ -CAkey ${CAKey} \
+ -in ${CSR} \
+ -out ${HelmCert}
+fi