Init commit

server/core/middlewares/csp.ts

@@ -0,0 +1,47 @@
+import { contentSecurityPolicy } from 'helmet'
+import { CONFIG } from '../initializers/config.js'
+
+const baseDirectives = Object.assign({},
+  {
+    defaultSrc: [ '\'none\'' ], // by default, not specifying default-src = '*'
+    connectSrc: [ '*', 'data:' ],
+    mediaSrc: [ '\'self\'', 'https:', 'blob:' ],
+    fontSrc: [ '\'self\'', 'data:' ],
+    imgSrc: [ '\'self\'', 'data:', 'blob:' ],
+    scriptSrc: [ '\'self\' \'unsafe-inline\' \'unsafe-eval\'', 'blob:' ],
+    scriptSrcAttr: [ '\'unsafe-inline\'' ],
+    styleSrc: [ '\'self\' \'unsafe-inline\'' ],
+    objectSrc: [ '\'none\'' ], // only define to allow plugins, else let defaultSrc 'none' block it
+    formAction: [ '\'self\'' ],
+    frameAncestors: [ '\'none\'' ],
+    baseUri: [ '\'self\'' ],
+    manifestSrc: [ '\'self\'' ],
+    frameSrc: [ '\'self\'' ], // instead of deprecated child-src / self because of test-embed
+    workerSrc: [ '\'self\'', 'blob:' ] // instead of deprecated child-src
+  },
+
+  CONFIG.CSP.REPORT_URI
+    ? { reportUri: CONFIG.CSP.REPORT_URI }
+    : {},
+
+  CONFIG.WEBSERVER.SCHEME === 'https'
+    ? { upgradeInsecureRequests: [] }
+    : {}
+)
+
+const baseCSP = contentSecurityPolicy({
+  directives: baseDirectives,
+  reportOnly: CONFIG.CSP.REPORT_ONLY
+})
+
+const embedCSP = contentSecurityPolicy({
+  directives: Object.assign({}, baseDirectives, { frameAncestors: [ '*' ] }),
+  reportOnly: CONFIG.CSP.REPORT_ONLY
+})
+
+// ---------------------------------------------------------------------------
+
+export {
+  baseCSP,
+  embedCSP
+}