#!/bin/bash
# shellcheck disable=SC2034,SC2153,SC2155,SC2164

# Copyright Istio Authors. All Rights Reserved.
#
# 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.

####################################################################################################
# WARNING: THIS IS AN AUTO-GENERATED FILE, DO NOT EDIT. PLEASE MODIFY THE ORIGINAL MARKDOWN FILE:
#          docs/tasks/security/authorization/authz-ingress/index.md
####################################################################################################

snip_before_you_begin_1() {
kubectl create ns foo
kubectl apply -f <(istioctl kube-inject -f samples/httpbin/httpbin.yaml) -n foo
kubectl apply -f <(istioctl kube-inject -f samples/httpbin/httpbin-gateway.yaml) -n foo
}

snip_before_you_begin_2() {
kubectl get pods -n istio-system -o name -l istio=ingressgateway | sed 's|pod/||' | while read -r pod; do istioctl proxy-config log "$pod" -n istio-system --level rbac:debug; done
}

snip_before_you_begin_3() {
curl "$INGRESS_HOST:$INGRESS_PORT"/headers -s -o /dev/null -w "%{http_code}\n"
}

! read -r -d '' snip_before_you_begin_3_out <<\ENDSNIP
200
ENDSNIP

! read -r -d '' snip_source_ip_address_of_the_original_client_1 <<\ENDSNIP
apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: proxy-protocol
  namespace: istio-system
spec:
  configPatches:
  - applyTo: LISTENER
    patch:
      operation: MERGE
      value:
        listener_filters:
        - name: envoy.listener.proxy_protocol
        - name: envoy.listener.tls_inspector
  workloadSelector:
    labels:
      istio: ingressgateway
ENDSNIP

! read -r -d '' snip_source_ip_address_of_the_original_client_2 <<\ENDSNIP
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  meshConfig:
    accessLogEncoding: JSON
    accessLogFile: /dev/stdout
  components:
    ingressGateways:
    - enabled: true
      k8s:
        hpaSpec:
          maxReplicas: 10
          minReplicas: 5
        serviceAnnotations:
          service.beta.kubernetes.io/aws-load-balancer-access-log-emit-interval: "5"
          service.beta.kubernetes.io/aws-load-balancer-access-log-enabled: "true"
          service.beta.kubernetes.io/aws-load-balancer-access-log-s3-bucket-name: elb-logs
          service.beta.kubernetes.io/aws-load-balancer-access-log-s3-bucket-prefix: k8sELBIngressGW
          service.beta.kubernetes.io/aws-load-balancer-proxy-protocol: "*"
        affinity:
          podAntiAffinity:
            preferredDuringSchedulingIgnoredDuringExecution:
            - podAffinityTerm:
                labelSelector:
                  matchLabels:
                    istio: ingressgateway
                topologyKey: failure-domain.beta.kubernetes.io/zone
              weight: 1
      name: istio-ingressgateway
ENDSNIP

snip_source_ip_address_of_the_original_client_3() {
kubectl patch svc istio-ingressgateway -n istio-system -p '{"spec":{"externalTrafficPolicy":"Local"}}'
}

! read -r -d '' snip_source_ip_address_of_the_original_client_4 <<\ENDSNIP
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  meshConfig:
    accessLogEncoding: JSON
    accessLogFile: /dev/stdout
    defaultConfig:
      gatewayTopology:
        numTrustedProxies: 1
ENDSNIP

! read -r -d '' snip_source_ip_address_of_the_original_client_5 <<\ENDSNIP
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  meshConfig:
    accessLogEncoding: JSON
    accessLogFile: /dev/stdout
  components:
    ingressGateways:
    - enabled: true
      k8s:
        hpaSpec:
          maxReplicas: 10
          minReplicas: 5
        serviceAnnotations:
          service.beta.kubernetes.io/aws-load-balancer-type: "nlb"
ENDSNIP

snip_ipbased_allow_list_and_deny_list_1() {
kubectl apply -f - <<EOF
apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: ingress-policy
  namespace: istio-system
spec:
  selector:
    matchLabels:
      app: istio-ingressgateway
  action: ALLOW
  rules:
  - from:
    - source:
        ipBlocks: ["1.2.3.4", "5.6.7.0/24"]
EOF
}

snip_ipbased_allow_list_and_deny_list_2() {
kubectl apply -f - <<EOF
apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: ingress-policy
  namespace: istio-system
spec:
  selector:
    matchLabels:
      app: istio-ingressgateway
  action: ALLOW
  rules:
  - from:
    - source:
        remoteIpBlocks: ["1.2.3.4", "5.6.7.0/24"]
EOF
}

snip_ipbased_allow_list_and_deny_list_3() {
curl "$INGRESS_HOST:$INGRESS_PORT"/headers -s -o /dev/null -w "%{http_code}\n"
}

! read -r -d '' snip_ipbased_allow_list_and_deny_list_3_out <<\ENDSNIP
403
ENDSNIP

snip_ipbased_allow_list_and_deny_list_4() {
CLIENT_IP=$(kubectl get pods -n istio-system -o name -l istio=ingressgateway | sed 's|pod/||' | while read -r pod; do kubectl logs "$pod" -n istio-system | grep remoteIP; done | tail -1 | awk -F, '{print $3}' | awk -F: '{print $2}' | sed 's/ //') && echo "$CLIENT_IP"
}

! read -r -d '' snip_ipbased_allow_list_and_deny_list_4_out <<\ENDSNIP
192.168.10.15
ENDSNIP

snip_ipbased_allow_list_and_deny_list_5() {
kubectl apply -f - <<EOF
apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: ingress-policy
  namespace: istio-system
spec:
  selector:
    matchLabels:
      app: istio-ingressgateway
  action: ALLOW
  rules:
  - from:
    - source:
        ipBlocks: ["1.2.3.4", "5.6.7.0/24", "$CLIENT_IP"]
EOF
}

snip_ipbased_allow_list_and_deny_list_6() {
CLIENT_IP=$(kubectl get pods -n istio-system -o name -l istio=ingressgateway | sed 's|pod/||' | while read -r pod; do kubectl logs "$pod" -n istio-system | grep remoteIP; done | tail -1 | awk -F, '{print $4}' | awk -F: '{print $2}' | sed 's/ //') && echo "$CLIENT_IP"
}

! read -r -d '' snip_ipbased_allow_list_and_deny_list_6_out <<\ENDSNIP
192.168.10.15
ENDSNIP

snip_ipbased_allow_list_and_deny_list_7() {
kubectl apply -f - <<EOF
apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: ingress-policy
  namespace: istio-system
spec:
  selector:
    matchLabels:
      app: istio-ingressgateway
  action: ALLOW
  rules:
  - from:
    - source:
        remoteIpBlocks: ["1.2.3.4", "5.6.7.0/24", "$CLIENT_IP"]
EOF
}

snip_ipbased_allow_list_and_deny_list_8() {
curl "$INGRESS_HOST:$INGRESS_PORT"/headers -s -o /dev/null -w "%{http_code}\n"
}

! read -r -d '' snip_ipbased_allow_list_and_deny_list_8_out <<\ENDSNIP
200
ENDSNIP

snip_ipbased_allow_list_and_deny_list_9() {
kubectl apply -f - <<EOF
apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: ingress-policy
  namespace: istio-system
spec:
  selector:
    matchLabels:
      app: istio-ingressgateway
  action: DENY
  rules:
  - from:
    - source:
        ipBlocks: ["$CLIENT_IP"]
EOF
}

snip_ipbased_allow_list_and_deny_list_10() {
kubectl apply -f - <<EOF
apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: ingress-policy
  namespace: istio-system
spec:
  selector:
    matchLabels:
      app: istio-ingressgateway
  action: DENY
  rules:
  - from:
    - source:
        remoteIpBlocks: ["$CLIENT_IP"]
EOF
}

snip_ipbased_allow_list_and_deny_list_11() {
curl "$INGRESS_HOST:$INGRESS_PORT"/headers -s -o /dev/null -w "%{http_code}\n"
}

! read -r -d '' snip_ipbased_allow_list_and_deny_list_11_out <<\ENDSNIP
403
ENDSNIP

snip_ipbased_allow_list_and_deny_list_12() {
kubectl get pods -n istio-system -o name -l istio=ingressgateway | sed 's|pod/||' | while read -r pod; do kubectl logs "$pod" -n istio-system; done
}

snip_clean_up_1() {
kubectl delete namespace foo
}

snip_clean_up_2() {
kubectl delete authorizationpolicy ingress-policy -n istio-system
}