[COMMON] Enable importing custom certificates to truststore using certInitializer

ONAP deployments may require the use of custom certificates. Instead of
manually adding certificates to the truststore file, users can now add
their .pem certificates under certInitializer/resources and have them
imported automatically by an init container. The updated truststore can
then be mounted to a component by providing a truststoreMountpath.

Issue-ID: OOM-2509
Signed-off-by: Jozsef Csongvai <jozsef.csongvai@bell.ca>
Change-Id: I896c729143346738e91fa57f895ba48043b253c1

3 files changed, 144 insertions, 3 deletions

diff --git a/kubernetes/common/certInitializer/resources/import-custom-certs.sh b/kubernetes/common/certInitializer/resources/import-custom-certs.sh
new file mode 100755
index 0000000000..dd311830e7
--- /dev/null
+++ b/kubernetes/common/certInitializer/resources/import-custom-certs.sh
@@ -0,0 +1,61 @@
+#!/bin/bash
+
+# Copyright © 2020 Bell Canada
+#
+# 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.
+
+CERTS_DIR=${CERTS_DIR:-/certs}
+WORK_DIR=${WORK_DIR:-/updatedTruststore}
+ONAP_TRUSTSTORE=${ONAP_TRUSTSTORE:-truststoreONAPall.jks}
+JRE_TRUSTSTORE=${JRE_TRUSTSTORE:-$JAVA_HOME/lib/security/cacerts}
+TRUSTSTORE_OUTPUT_FILENAME=${TRUSTSTORE_OUTPUT_FILENAME:-truststore.jks}
+
+mkdir -p $WORK_DIR
+
+# Decrypt and move relevant files to WORK_DIR
+for f in $CERTS_DIR/*; do
+  if [[ $AAF_ENABLED == false ]] && [[ $f == *$ONAP_TRUSTSTORE* ]]; then
+    # Dont use onap truststore when aaf is disabled
+    continue
+  fi
+  if [[ $f == *.sh ]]; then
+    continue
+  fi
+  if [[ $f == *.b64 ]]
+    then
+      base64 -d $f > $WORK_DIR/`basename $f .b64`
+    else
+      cp $f $WORK_DIR/.
+  fi
+done
+
+# Prepare truststore output file
+if [[ $AAF_ENABLED == true ]]
+  then
+    mv $WORK_DIR/$ONAP_TRUSTSTORE $WORK_DIR/$TRUSTSTORE_OUTPUT_FILENAME
+  else
+    echo "AAF is disabled, using JRE truststore"
+    cp $JRE_TRUSTSTORE $WORK_DIR/$TRUSTSTORE_OUTPUT_FILENAME
+fi
+
+# Import Custom Certificates
+for f in $WORK_DIR/*; do
+  if [[ $f == *.pem ]]; then
+    echo "importing certificate: $f"
+    keytool -import -file $f -alias `basename $f` -keystore $WORK_DIR/$TRUSTSTORE_OUTPUT_FILENAME -storepass $TRUSTSTORE_PASSWORD -noprompt
+    if [[ $? != 0 ]]; then
+      echo "failed importing certificate: $f"
+      exit 1
+    fi
+  fi
+done
diff --git a/kubernetes/common/certInitializer/templates/_certInitializer.yaml b/kubernetes/common/certInitializer/templates/_certInitializer.yaml
index 1250c1225e..c453f11c85 100644
--- a/kubernetes/common/certInitializer/templates/_certInitializer.yaml
+++ b/kubernetes/common/certInitializer/templates/_certInitializer.yaml
@@ -1,5 +1,5 @@
 {{/*
-# Copyright © 2020 Samsung Electronics
+# Copyright © 2020 Bell Canada, Samsung Electronics
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -96,6 +96,51 @@
       value: "{{ $initRoot.public_fqdn | default "" }}"
 {{- end -}}
 
+{{/*
+  This init container will import custom .pem certificates to truststoreONAPall.jks
+  Custom certificates must be placed in common/certInitializer/resources directory.
+
+  The feature is enabled by setting Values.global.importCustomCertsEnabled = true
+  It can be used independently of aafEnabled, however it requires the same includes
+  as describe above for _initContainer.
+
+  When AAF is enabled the truststoreONAPAll.jks (which contains AAF CA) will be used
+  to import custom certificates, otherwise the default java keystore will be used.
+
+  The updated truststore file will be placed in /updatedTruststore and can be mounted per component
+  to a specific path by defining Values.certInitializer.truststoreMountpath (see _trustStoreVolumeMount)
+  The truststore file will be available to mount even if no custom certificates were imported.
+*/}}
+{{- define "common.certInitializer._initImportCustomCertsContainer" -}}
+{{-   $dot := default . .dot -}}
+{{-   $initRoot := default $dot.Values.certInitializer .initRoot -}}
+{{- $subchartDot := fromJson (include "common.subChartDot" (dict "dot" $dot "initRoot" $initRoot)) }}
+- name: {{ include "common.name" $dot }}-import-custom-certs
+  image: {{ $subchartDot.Values.global.jreImage }}
+  imagePullPolicy: {{ $subchartDot.Values.global.pullPolicy | default $subchartDot.Values.pullPolicy }}
+  securityContext:
+    runAsUser: 0
+  command:
+    - /bin/bash
+    - -c
+    - /root/import-custom-certs.sh
+  env:
+    - name: AAF_ENABLED
+      value: "{{  $subchartDot.Values.global.aafEnabled }}"
+    - name: TRUSTSTORE_OUTPUT_FILENAME
+      value: "{{ $initRoot.truststoreOutputFileName }}"
+    - name: TRUSTSTORE_PASSWORD
+    {{- include "common.secret.envFromSecretFast" (dict "global" $subchartDot "uid" "truststore-creds" "key" "password") | indent 6 }}
+  volumeMounts:
+    - mountPath: /certs
+      name: aaf-agent-certs
+    - mountPath: /root/import-custom-certs.sh
+      name: aaf-agent-certs
+      subPath: import-custom-certs.sh
+    - mountPath: /updatedTruststore
+      name: updated-truststore
+{{- end -}}
+
 {{- define "common.certInitializer._volumeMount" -}}
 {{-   $dot := default . .dot -}}
 {{-   $initRoot := default $dot.Values.certInitializer .initRoot -}}
@@ -103,6 +148,21 @@
   name: {{ include "common.certInitializer._aafConfigVolumeName" $dot }}
 {{- end -}}
 
+{{/*
+  This is used together with _initImportCustomCertsContainer
+  It mounts the updated truststore (with imported custom certificates) to the
+  truststoreMountpath defined in the values file for the component.
+*/}}
+{{- define "common.certInitializer._trustStoreVolumeMount" -}}
+{{-   $dot := default . .dot -}}
+{{-   $initRoot := default $dot.Values.certInitializer .initRoot -}}
+{{- if gt (len $initRoot.truststoreMountpath) 0 }}
+- mountPath: {{ $initRoot.truststoreMountpath }}/{{ $initRoot.truststoreOutputFileName }}
+  name: updated-truststore
+  subPath: {{ $initRoot.truststoreOutputFileName }}
+{{- end -}}
+{{- end -}}
+
 {{- define "common.certInitializer._volumes" -}}
 {{-   $dot := default . .dot -}}
 {{-   $initRoot := default $dot.Values.certInitializer .initRoot -}}
@@ -121,10 +181,17 @@
     name: {{ include "common.fullname" $subchartDot }}-add-config
     defaultMode: 0700
 {{-     end -}}
+{{-     if $dot.Values.global.importCustomCertsEnabled }}
+- name: updated-truststore
+  emptyDir: {}
+{{-     end -}}
 {{- end -}}
 
 {{- define "common.certInitializer.initContainer" -}}
 {{-   $dot := default . .dot -}}
+  {{- if $dot.Values.global.importCustomCertsEnabled }}
+    {{ include "common.certInitializer._initImportCustomCertsContainer" . }}
+  {{- end -}}
   {{- if $dot.Values.global.aafEnabled }}
     {{ include "common.certInitializer._initContainer" . }}
   {{- end -}}
@@ -135,11 +202,14 @@
   {{- if $dot.Values.global.aafEnabled }}
     {{- include "common.certInitializer._volumeMount" . }}
   {{- end -}}
+  {{- if $dot.Values.global.importCustomCertsEnabled }}
+    {{- include "common.certInitializer._trustStoreVolumeMount" . }}
+  {{- end -}}
 {{- end -}}
 
 {{- define "common.certInitializer.volumes" -}}
 {{-   $dot := default . .dot -}}
-  {{- if $dot.Values.global.aafEnabled }}
+  {{- if or ($dot.Values.global.aafEnabled ) ($dot.Values.global.importCustomCertsEnabled) }}
     {{- include "common.certInitializer._volumes" . }}
   {{- end -}}
 {{- end -}}
diff --git a/kubernetes/common/certInitializer/values.yaml b/kubernetes/common/certInitializer/values.yaml
index 416282f72a..271e410069 100644
--- a/kubernetes/common/certInitializer/values.yaml
+++ b/kubernetes/common/certInitializer/values.yaml
@@ -1,4 +1,4 @@
-# Copyright © 2020 Samsung Electronics
+# Copyright © 2020 Bell Canada, Samsung Electronics
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@ global:
   repository: nexus3.onap.org:10001
   aafAgentImage: onap/aaf/aaf_agent:2.1.20
   aafEnabled: true
+  jreImage: registry.gitlab.com/onap-integration/docker/onap-java
 
 pullPolicy: Always
 
@@ -26,6 +27,11 @@ secrets:
     login: '{{ .Values.aafDeployFqi }}'
     password: '{{ .Values.aafDeployPass }}'
     passwordPolicy: required
+  - uid: truststore-creds
+    type: password
+    externalSecret: '{{ tpl (default "" .Values.truststoreCredsExternalSecret) . }}'
+    password: '{{ .Values.truststorePassword }}'
+    passwordPolicy: required
 
 readinessCheck:
   wait_for:
@@ -45,3 +51,7 @@ cadi_latitude: "38.0"
 cadi_longitude: "-72.0"
 aaf_add_config: ""
 mountPath: "/opt/app/osaaf"
+importCustomCertsEnabled: false
+truststoreMountpath: ""
+truststoreOutputFileName: truststore.jks
+truststorePassword: changeit