first commit
This commit is contained in:
commit
4830d76cc9
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@ -0,0 +1,18 @@
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FROM nginx:stable-alpine
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# Variabili necessarie
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ENV DOCKER_FULL_STACK_SERVICE_NAME="localhost"
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ENV DOCKER_SERVICE_PORT=8080
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ENV SERVICE_HOST="localhost"
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ENV KEYCLOACK_SERVER="localhost"
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ENV ACCOUNTING_SERVICE_BASEURL="https://localhost"
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ENV SUBREQUEST_OUTPUT_BUFFER_SIZE="8192k"
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COPY src/nginx.conf /etc/nginx/nginx.conf
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COPY src/config.js /etc/nginx/config.js
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COPY src/nginx.default.conf.template /etc/nginx/templates/default.conf.template
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COPY src/pep.js /etc/nginx/pep.js
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export default { config };
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var config = {
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"pep_credentials" : "{{ keycloak_pep_credentials }}",
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"debug": true,
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"accounting": {
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"scope": "{{ authorized_scopes }}",
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"service_name": "{{ docker_stack_name }}",
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"host": "{{ service_host }}"
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},
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"hosts": [
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{
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"host": ["{{ service_host }}"],
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"audience": "{{ keycloack_client_id }}",
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"allow-basic-auth": "{{ pep_allow_basic_auth }}",
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"paths": [
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{
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"name": "{{ keycloack_client_resource_name }}",
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"path": "^/?.*$",
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"methods": [
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{
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"method": "GET"
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},
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{
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"method": "POST"
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}
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]
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}
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]
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}
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]
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}
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@ -0,0 +1,46 @@
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# Added to load njs module
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load_module modules/ngx_http_js_module.so;
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user nginx;
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worker_processes auto;
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error_log /var/log/nginx/error.log notice;
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pid /var/run/nginx.pid;
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events {
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worker_connections 1024;
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}
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# declare environmental variable to get credentials requiredd to access keycloak
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env PEP_CREDENTIALS;
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http {
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# added to import pep script
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js_import pep.js;
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# added to bind enforce function
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js_set $authorization pep.enforce;
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# added to create cache for tokens and auth calls
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proxy_cache_path /var/cache/nginx/pep keys_zone=token_responses:1m max_size=2m;
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include /etc/nginx/mime.types;
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default_type application/octet-stream;
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log_format main '$remote_addr - $remote_user [$time_local] "$request" '
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'$status $body_bytes_sent "$http_referer" '
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'"$http_user_agent" "$http_x_forwarded_for"';
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access_log /var/log/nginx/access.log main;
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sendfile on;
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#tcp_nopush on;
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keepalive_timeout 65;
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#gzip on;
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include /etc/nginx/conf.d/*.conf;
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}
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@ -0,0 +1,94 @@
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# backend service
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upstream service {
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ip_hash;
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server ${DOCKER_FULL_STACK_SERVICE_NAME}:${DOCKER_SERVICE_PORT};
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}
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# variables computed by njs and which may possibly be passed among locations
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js_var $auth_token;
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js_var $account_record;
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js_var $pep_credentials;
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# proxy_cache_path /tmp levels=1:2 keys_zone=social_cache:10m max_size=10g inactive=60m use_temp_path=off;
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server {
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listen *:80;
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listen [::]:80;
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server_name ${SERVICE_HOST};
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subrequest_output_buffer_size ${SUBREQUEST_OUTPUT_BUFFER_SIZE};
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location /health {
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add_header Content-Length 0;
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add_header Content-Type "text/plain";
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return 200;
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}
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location / {
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proxy_read_timeout 300;
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proxy_send_timeout 300;
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js_content pep.enforce;
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}
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# internal location that redirects to backend will only be called from PEP JS code when all checks are passed
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location /_backend {
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internal;
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proxy_set_header Host $http_host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-NginX-Proxy true;
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proxy_cache_bypass $http_upgrade;
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# proxy_redirect off;
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proxy_pass http://service$request_uri;
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}
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# internal location that redirects to Keycloak in order to verify a token's validity. This will be called only from PEP JS code
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location /jwt_verify_request {
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internal;
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proxy_method POST;
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proxy_http_version 1.1;
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proxy_set_header Authorization $pep_credentials;
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proxy_set_header Content-Type "application/x-www-form-urlencoded";
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proxy_pass "https://${KEYCLOACK_SERVER}/auth/realms/d4science/protocol/openid-connect/token/introspect";
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proxy_ignore_headers Cache-Control Expires Set-Cookie;
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gunzip on;
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}
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# internal location that redirects to Keycloak in order to exchange Basic auth credentials with token. This will be called only from PEP JS code
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location /jwt_request {
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internal;
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proxy_method POST;
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proxy_http_version 1.1;
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proxy_set_header Authorization $pep_credentials;
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proxy_set_header Content-Type "application/x-www-form-urlencoded";
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proxy_pass "https://${KEYCLOACK_SERVER}/auth/realms/d4science/protocol/openid-connect/token";
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gunzip on;
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}
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# internal location that redirects to Keycloak in order to perform a specific authorization request. This will be called only from PEP JS code
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location /permission_request {
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internal;
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proxy_method POST;
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proxy_http_version 1.1;
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proxy_set_header Content-Type "application/x-www-form-urlencoded";
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proxy_set_header Authorization "Bearer $auth_token";
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proxy_pass "https://${KEYCLOACK_SERVER}/auth/realms/d4science/protocol/openid-connect/token";
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gunzip on;
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}
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# internal location that sends a record to accounting service. This will be called only from PEP JS code if requested.
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location /accounting {
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internal;
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proxy_method POST;
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proxy_http_version 1.1;
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proxy_set_header Authorization "Bearer $auth_token";
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proxy_set_header Content-Type "application/json";
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proxy_pass "${ACCOUNTING_SERVICE_BASEURL}/record";
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}
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}
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@ -0,0 +1,427 @@
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export default { enforce };
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import defaultExport from './config.js';
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function log(c, s){
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c.request.error(s)
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}
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var _debug = defaultExport["debug"]
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function debug(c, s){
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if(_debug === true){
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log(c, s)
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}
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}
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function enforce(r) {
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var context = {
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request: r ,
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config : defaultExport["config"],
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backend : (defaultExport.backend ? defaultExport.backend : "/_backend")
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}
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log(context, "Inside NJS enforce for " + r.method + " @ " + r.headersIn.host + r.uri)
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context = computeProtection(context)
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wkf.run(wkf.build(context), context)
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}
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// ######## WORKFLOW FUNCTIONS ###############
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var wkf = {
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build : (context)=>{
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var actions = [
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"export_pep_credentials",
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"parse_authentication",
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"check_authentication",
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"export_authn_token",
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// "pip",
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"pdp",
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// "export_backend_headers",
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// "pass"
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"start_accounting",
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"pass_and_wait",
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"close_accounting",
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"send_accounting",
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"respond_to_client"
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]
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/*var actions = [
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"export_pep_credentials",
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"parse_authentication",
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"check_authentication",
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"export_authn_token",
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"pip",
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"pdp",
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"export_backend_headers",
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"start_accounting",
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"pass_and_wait",
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"close_accounting",
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"respond_to_client"
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]*/
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return actions
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},
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run : (actions, context) => {
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context.request.error("Starting workflow with " + njs.dump(actions))
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var w = actions.reduce(
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(acc, f) => { return acc.then(typeof(f) === "function" ? f : wkf[f]) },
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Promise.resolve().then(()=>context)
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)
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w.catch(e => { context.request.error(njs.dump(e)); context.request.return(401)} )
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},
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export_pep_credentials : exportPepCredentials,
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export_authn_token : exportAuthToken,
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export_backend_headers : exportBackendHeaders,
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parse_authentication : parseAuthentication,
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check_authentication : checkAuthentication,
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verify_token : verifyToken,
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request_token : requestToken,
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pip : pipExecutor,
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pdp : pdpExecutor,
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pass : pass,
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pass_and_wait : pass_and_wait,
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respond_to_client : respondToClient,
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start_accounting : buildAccountingRecord,
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close_accounting : closeAccountingRecord,
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send_accounting : sendAccountingRecord
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}
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function getTokenField(context, f){
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return context.authn.verified_token[f]
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}
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function exportVariable(context, name, value){
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context.request.variables[name] = value
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return context
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}
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function exportBackendHeaders(context){
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return context
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}
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function exportPepCredentials(context){
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if(process.env["pep_credentials"] || process.env["PEP_CREDENTIALS"]){
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return exportVariable(context, "pep_credentials", "Basic " + process.env["PEP_CREDENTIALS"])
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}else if(context.config["pep_credentials"]){
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return exportVariable(context, "pep_credentials", "Basic " + context.config["pep_credentials"])
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}else{
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throw new Error("Need PEP credentials")
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}
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}
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function exportAuthToken(context){
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return exportVariable(context, "auth_token", context.authn.token)
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}
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function checkAuthentication(context){
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return context.authn.type === "bearer" ? wkf.verify_token(context) : wkf.request_token(context)
|
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}
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|
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function parseAuthentication(context){
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context.request.log("Inside parseAuthentication")
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var incomingauth = context.request.headersIn["Authorization"]
|
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|
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if(!incomingauth) throw new Error("Authentication required");
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|
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var arr = incomingauth.trim().replace(/\s\s+/g, " ").split(" ")
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if(arr.length != 2) throw new Error("Unknown authentication scheme");
|
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|
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var type = arr[0].toLowerCase()
|
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if(type === "basic" && context.authz.host && (context.authz.host["allow-basic-auth"] || context.authz.host["allow_basic_auth"])) {
|
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var unamepass = Buffer.from(arr[1], 'base64').toString().split(":")
|
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if(unamepass.length != 2) return null;
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context.authn = { type : type, raw : arr[1], user : unamepass[0], password : unamepass[1]}
|
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return context
|
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}else if(type === "bearer"){
|
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context.authn = { type : type, raw : arr[1], token : arr[1]}
|
||||
return context
|
||||
}
|
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throw new Error("Unknown authentication scheme");
|
||||
}
|
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|
||||
function verifyToken(context){
|
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log(context, "Inside verifyToken")
|
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debug(context, "Token is " + context.authn.token)
|
||||
var options = {
|
||||
"body" : "token=" + context.authn.token + "&token_type_hint=access_token"
|
||||
}
|
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return context.request.subrequest("/jwt_verify_request", options)
|
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.then(reply=>{
|
||||
if (reply.status === 200) {
|
||||
var response = JSON.parse(reply.responseText);
|
||||
if (response.active === true) {
|
||||
return response
|
||||
} else {
|
||||
throw new Error("Unauthorized: " + reply.responseText)
|
||||
}
|
||||
} else {
|
||||
throw new Error("Unauthorized: " + reply.responseText)
|
||||
}
|
||||
}).then(verified_token => {
|
||||
context.authn.verified_token =
|
||||
JSON.parse(Buffer.from(context.authn.token.split('.')[1], 'base64url').toString())
|
||||
return context
|
||||
})
|
||||
}
|
||||
|
||||
function requestToken(context){
|
||||
log(context, "Inside requestToken")
|
||||
var options = {
|
||||
"body" : "grant_type=client_credentials&client_id="+context.authn.user+"&client_secret="+context.authn.password
|
||||
}
|
||||
return context.request.subrequest("/jwt_request", options)
|
||||
.then(reply=>{
|
||||
if (reply.status === 200) {
|
||||
var response = JSON.parse(reply.responseText);
|
||||
context.authn.token = response.access_token
|
||||
context.authn.verified_token =
|
||||
JSON.parse(Buffer.from(context.authn.token.split('.')[1], 'base64url').toString())
|
||||
return context
|
||||
} else if (reply.status === 400 || reply.status === 401){
|
||||
var options = {
|
||||
"body" : "grant_type=password&username="+context.authn.user+"&password="+context.authn.password
|
||||
}
|
||||
return context.request.subrequest("/jwt_request", options)
|
||||
.then( reply=>{
|
||||
if (reply.status === 200) {
|
||||
var response = JSON.parse(reply.responseText);
|
||||
context.authn.token = response.access_token
|
||||
context.authn.verified_token =
|
||||
JSON.parse(Buffer.from(context.authn.token.split('.')[1], 'base64url').toString())
|
||||
return context
|
||||
} else{
|
||||
throw new Error("Unauthorized " + reply.status)
|
||||
}
|
||||
})
|
||||
} else {
|
||||
throw new Error("Unauthorized " + reply.status)
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
function pipExecutor(context){
|
||||
log(context, "Inside extra claims PIP")
|
||||
context.authz.pip.forEach(extra =>{
|
||||
//call extra claim pip function
|
||||
try{
|
||||
var operator = extra.operator
|
||||
var result = wkf[operator](context, extra.args)
|
||||
//ensure array and add to extra_claims
|
||||
if(!(result instanceof Array)) result = [result]
|
||||
if(!context.extra_claims) context.extra_claims = {};
|
||||
context.extra_claims[extra.claim] = result
|
||||
} catch (error){
|
||||
log(context, "Skipping invalid extra claim " + njs.dump(error))
|
||||
}
|
||||
})
|
||||
log(context, "Extra claims are " + njs.dump(context.extra_claims))
|
||||
return context
|
||||
}
|
||||
|
||||
function pdpExecutor(context){
|
||||
log(context, "Inside PDP")
|
||||
return context.authz.pdp(context)
|
||||
}
|
||||
|
||||
function umaCall(context){
|
||||
log(context, "Inside UMA call")
|
||||
var options = { "body" : computePermissionRequestBody(context) };
|
||||
return context.request.subrequest("/permission_request", options)
|
||||
.then(reply =>{
|
||||
if(reply.status === 200){
|
||||
debug(context, "UMA call reply is " + reply.status)
|
||||
return context
|
||||
}else{
|
||||
throw new Error("Response for authorization request is not ok " + reply.status + " " + njs.dump(reply.responseText))
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
// Call backend and return reply to client directly
|
||||
async function pass(context){
|
||||
log(context, "Inside pass and wait");
|
||||
const r = context.request
|
||||
const reply = await r.subrequest(context.backend, { method : r.method, args : r.variables.args, headers : r.headersIn})
|
||||
debug(context, "[BACKEND] response status: " + reply.status)
|
||||
context.backendresponse = reply
|
||||
return respondToClient(context)
|
||||
}
|
||||
|
||||
// Pass to backend but instead of returning to client wait for the reply. Thi intercepts the possibility of performing extra action like closing and sending accounting record.
|
||||
async function pass_and_wait(context){
|
||||
log(context, "Inside pass and wait");
|
||||
const r = context.request
|
||||
const reply = await r.subrequest(context.backend, { method : r.method, args : r.variables.args, headers : r.headersIn})
|
||||
debug(context, "[BACKEND] response status: " + reply.status)
|
||||
context.backendresponse = reply
|
||||
return context
|
||||
}
|
||||
|
||||
// Definetely return backend response
|
||||
function respondToClient(context){
|
||||
log(context, "Inside respond to client" + njs.dump(context.backendresponse));
|
||||
for(let k in context.backendresponse.headersOut){
|
||||
context.request.headersOut[k] = context.backendresponse.headersOut[k]
|
||||
}
|
||||
context.request.return(context.backendresponse.status, context.backendresponse.responseText)
|
||||
return context
|
||||
}
|
||||
|
||||
// ######## AUTHORIZATION PART ###############
|
||||
function computePermissionRequestBody(context){
|
||||
|
||||
if(!context.authz.host || !context.authz.path ){
|
||||
throw new Error("Enforcemnt mode is always enforcing. Host or path not found...")
|
||||
}
|
||||
|
||||
var audience = computeAudience(context)
|
||||
var grant = "grant_type=urn:ietf:params:oauth:grant-type:uma-ticket"
|
||||
var mode = "response_mode=decision"
|
||||
var permissions = computePermissions(context)
|
||||
var extra = ""
|
||||
if(context.extra_claims){
|
||||
extra =
|
||||
"claim_token_format=urn:ietf:params:oauth:token-type:jwt&claim_token=" +
|
||||
JSON.stringify(context.extra_claims).toString("base64url")
|
||||
}
|
||||
var body = audience + "&" + grant + "&" + permissions + "&" + mode + "&" + extra
|
||||
context.request.error("Computed permission request body is " + body)
|
||||
return body
|
||||
}
|
||||
|
||||
function computeAudience(context){
|
||||
var aud = context.request.headersIn.host
|
||||
if(context.authz.host){
|
||||
aud = context.authz.host.audience||context.authz.host.host
|
||||
}
|
||||
return "audience=" + aud
|
||||
}
|
||||
|
||||
function computePermissions(context){
|
||||
var resource = context.request.uri
|
||||
if(context.authz.path){
|
||||
resource = context.authz.path.name||context.authz.path.path
|
||||
}
|
||||
var scopes = []
|
||||
if(context.authz.method && context.authz.method.scopes){
|
||||
scopes = context.authz.method.scopes
|
||||
}
|
||||
if(scopes.length > 0){
|
||||
return scopes.map(s=>"permission=" + resource + "#" + s).join("&")
|
||||
}
|
||||
return "permission=" + resource
|
||||
}
|
||||
|
||||
function getPath(hostconfig, incomingpath, incomingmethod){
|
||||
var paths = hostconfig.paths || []
|
||||
var matchingpaths = paths
|
||||
.filter(p => {return incomingpath.match(p.path) != null})
|
||||
.reduce((acc, p) => {
|
||||
if (!p.methods || p.methods.length === 0) acc.weak.push({ path: p});
|
||||
else{
|
||||
var matchingmethods = p.methods.filter(m=>m.method.toUpperCase() === incomingmethod)
|
||||
if(matchingmethods.length > 0) acc.strong.push({ method : matchingmethods[0], path: p});
|
||||
}
|
||||
return acc;
|
||||
}, { strong: [], weak: []})
|
||||
return matchingpaths.strong.concat(matchingpaths.weak)[0]
|
||||
}
|
||||
|
||||
function getHost(config, host){
|
||||
var matching = config.hosts.filter(h=>{
|
||||
//compare for both string and array of strings
|
||||
return ((h.host.filter && h.host.indexOf(host) !== -1) || h.host === host)
|
||||
})
|
||||
return matching.length > 0 ? matching[0] : null
|
||||
}
|
||||
|
||||
function computeProtection(context){
|
||||
debug(context, "Getting by host " + context.request.headersIn.host)
|
||||
context.authz = {}
|
||||
context.authz.host = getHost(context.config, context.request.headersIn.host)
|
||||
if(context.authz.host !== null){
|
||||
log(context, "Host found:" + context.authz.host)
|
||||
context.authz.pip = context.authz.host.pip ? context.authz.host.pip : [];
|
||||
context.authz.pdp = context.authz.host.pdp ? context.authz.host.pdp : umaCall;
|
||||
var pathandmethod = getPath(context.authz.host, context.request.uri, context.request.method);
|
||||
if(pathandmethod){
|
||||
context.authz.path = pathandmethod.path;
|
||||
context.authz.pip = context.authz.path.pip ? context.authz.pip.concat(context.authz.path.pip) : context.authz.pip;
|
||||
context.authz.pdp = context.authz.path.pdp ? context.authz.path.pdp : context.authz.pdp;
|
||||
context.authz.method = pathandmethod.method;
|
||||
if(context.authz.method){
|
||||
context.authz.pip = context.authz.method.pip ? context.authz.pip.concat(context.authz.method.pip) : context.authz.pip;
|
||||
context.authz.pdp = context.authz.method.pdp ? context.authz.method.pdp : context.authz.pdp;
|
||||
}
|
||||
}
|
||||
}
|
||||
debug(context, "Leaving protection computation: ")
|
||||
return context
|
||||
}
|
||||
|
||||
// ####### ACCOUNTING PART #####################
|
||||
function buildAccountingRecord(context){
|
||||
log(context, "Inside build accounting record");
|
||||
const t = (new Date()).getTime()
|
||||
context.record = {
|
||||
"recordType": "ServiceUsageRecord",
|
||||
"operationCount": 1,
|
||||
"creationTime": t,
|
||||
"callerHost": context.request.headersIn["x-forwarded-for"],
|
||||
"serviceClass": "Application",
|
||||
"callerQualifier": "TOKEN",
|
||||
"consumerId": getTokenField(context, "preferred_username"),
|
||||
"aggregated": true,
|
||||
"serviceName": defaultExport["accounting"]["service_name"],
|
||||
"duration": 0,
|
||||
"maxInvocationTime": 0,
|
||||
"scope": defaultExport["accounting"]["scope"],
|
||||
"host": defaultExport["accounting"]["host"],
|
||||
"startTime": t,
|
||||
"id": uuid(),
|
||||
"calledMethod": context.request.method + " " + context.request.uri,
|
||||
"endTime": 0,
|
||||
"minInvocationTime": 0,
|
||||
"operationResult": null
|
||||
}
|
||||
debug(context, "Record is " + JSON.stringify(context.record))
|
||||
return context
|
||||
}
|
||||
|
||||
function closeAccountingRecord(context, success){
|
||||
log(context, "Inside close accounting");
|
||||
const t = (new Date()).getTime()
|
||||
context.record.duration = t - context.record.startTime
|
||||
context.record.endTime = t
|
||||
context.record.minInvocationTime = context.record.duration
|
||||
context.record.operationResult = success ? "SUCCESS" : "FAILED";
|
||||
debug(context, "Record is " + JSON.stringify(context.record))
|
||||
return context
|
||||
}
|
||||
|
||||
async function sendAccountingRecord(context){
|
||||
log(context, "Inside send accounting");
|
||||
const detached = !_debug;
|
||||
const subreq_params = { detached : detached, body : JSON.stringify([context.record]) };
|
||||
if (_debug) {
|
||||
// debug(context, JSON.stringify(subreq_params));
|
||||
const acc_request = await context.request.subrequest("/accounting", subreq_params);
|
||||
debug(context, "[ACCOUNTING] response status: " + JSON.stringify(acc_request));
|
||||
} else {
|
||||
context.request.subrequest("/accounting", subreq_params);
|
||||
}
|
||||
// const acc_request = await context.request.subrequest("/accounting", { detached : false, body : JSON.stringify([context.record]) })
|
||||
// debug(context, "[ACCOUNTING] response status: " + acc_request.status)
|
||||
// debug(context, "[ACCOUNTING] " + njs.dump(acc_request));
|
||||
return context
|
||||
}
|
||||
|
||||
function uuid() {
|
||||
return 'xxxxxxxx-xxxx-4xxx-8xxx-xxxxxxxxxxxx'.replace(/[x]/g, function (c) {
|
||||
const r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
|
||||
return v.toString(16);
|
||||
});
|
||||
}
|
||||
Loading…
Reference in New Issue