Web security configuration

Signed-off-by: eternal-flame-AD <yume@yumechi.jp>

.config/cypress-devcontainer.yml

@@ -168,8 +168,8 @@ id: 'aidx'
 #  options:
 #    dsn: 'https://examplePublicKey@o0.ingest.sentry.io/0'
 
-#   ┌─────────────────────┐
-#───┘ Other configuration └─────────────────────────────────────
+#  ┌──────────────┐
+#──┘ Web Security └──────────────────────────────────────
 
 # Whether disable HSTS
 #disableHsts: true
@@ -180,6 +180,24 @@ id: 'aidx'
 #   - https://hstspreload.org/
 #hstsPreload: false
 
+# Enable additional security headers that reduce the risk of XSS attacks or privacy leaks.
+# browserSandboxing:
+#  # Do not send the Referrer header to other domains. The default when browserSandboxing is missing is true.
+#  strictOriginReferrer: true
+#  csp: 
+#    # Do not send a CSP header. The default is a strict CSP header that prevents any form of external fetching or execution.
+#    disable: false
+#    # Merge additional directives into the CSP header. The default is an empty object.
+#    # You may want to list your CDN or other trusted domains here.
+#    # Media proxies are automatically added to the CSP header. This is an exception, things like Sentry will not be automatically added.
+#    appendDirectives:
+#      'script-src':
+#        - "'unsafe-eval'" # do not use this ... just an example
+#        - 'https://example.com'
+
+#   ┌─────────────────────┐
+#───┘ Other configuration └─────────────────────────────────────
+
 # Number of worker processes
 #clusterLimit: 1
 

.config/docker_example.yml

@@ -162,8 +162,8 @@ id: 'aidx'
 #  options:
 #    dsn: 'https://examplePublicKey@o0.ingest.sentry.io/0'
 
-#   ┌─────────────────────┐
-#───┘ Other configuration └─────────────────────────────────────
+#  ┌──────────────┐
+#──┘ Web Security └──────────────────────────────────────
 
 # Whether disable HSTS
 #disableHsts: true
@@ -174,6 +174,24 @@ id: 'aidx'
 #   - https://hstspreload.org/
 #hstsPreload: false
 
+# Enable additional security headers that reduce the risk of XSS attacks or privacy leaks.
+# browserSandboxing:
+#  # Do not send the Referrer header to other domains. The default when browserSandboxing is missing is true.
+#  strictOriginReferrer: true
+#  csp: 
+#    # Do not send a CSP header. The default is a strict CSP header that prevents any form of external fetching or execution.
+#    disable: false
+#    # Merge additional directives into the CSP header. The default is an empty object.
+#    # You may want to list your CDN or other trusted domains here.
+#    # Media proxies are automatically added to the CSP header. This is an exception, things like Sentry will not be automatically added.
+#    appendDirectives:
+#      'script-src':
+#        - "'unsafe-eval'" # do not use this ... just an example
+#        - 'https://example.com'
+
+#   ┌─────────────────────┐
+#───┘ Other configuration └─────────────────────────────────────
+
 # Number of worker processes
 #clusterLimit: 1
 

.config/example.yml

@@ -244,8 +244,8 @@ id: 'aidx'
 #  options:
 #    dsn: 'https://examplePublicKey@o0.ingest.sentry.io/0'
 
-#   ┌─────────────────────┐
-#───┘ Other configuration └─────────────────────────────────────
+#  ┌──────────────┐
+#──┘ Web Security └──────────────────────────────────────
 
 # Whether disable HSTS
 #disableHsts: true
@@ -256,6 +256,24 @@ id: 'aidx'
 #   - https://hstspreload.org/
 #hstsPreload: false
 
+# Enable additional security headers that reduce the risk of XSS attacks or privacy leaks.
+# browserSandboxing:
+#  # Do not send the Referrer header to other domains. The default when browserSandboxing is missing is true.
+#  strictOriginReferrer: true
+#  csp: 
+#    # Do not send a CSP header. The default is a strict CSP header that prevents any form of external fetching or execution.
+#    disable: false
+#    # Merge additional directives into the CSP header. The default is an empty object.
+#    # You may want to list your CDN or other trusted domains here.
+#    # Media proxies are automatically added to the CSP header. This is an exception, things like Sentry will not be automatically added.
+#    appendDirectives:
+#      'script-src':
+#        - "'unsafe-eval'" # do not use this ... just an example
+#        - 'https://example.com'
+
+#   ┌─────────────────────┐
+#───┘ Other configuration └─────────────────────────────────────
+
 # Number of worker processes
 #clusterLimit: 1
 

packages/backend/src/config.ts

@@ -20,6 +20,18 @@ type RedisOptionsSource = Partial<RedisOptions> & {
 	prefix?: string;
 };
 
+type BrowserSandboxing = {
+	// send Referrer-Policy: strict-origin
+	strictOriginReferrer?: boolean;
+	csp?: {
+		disable?: boolean;
+
+		appendDirectives?: {
+			[directive: string]: string | string[];
+		}
+	};
+};
+
 /**
  * 設定ファイルの型
  */
@@ -65,6 +77,8 @@ type Source = {
 
 	publishTarballInsteadOfProvideRepositoryUrl?: boolean;
 
+	browserSandboxing?: BrowserSandboxing;
+
 	setupPassword?: string;
 
 	proxy?: string;
@@ -155,7 +169,9 @@ export type Config = {
 	proxyRemoteFiles: boolean | undefined;
 	signToActivityPubGet: boolean | undefined;
 
-	cspPrerenderedContent: Map<string, CSPHashed>,
+	browserSandboxing: BrowserSandboxing;
+
+	cspPrerenderedContent: Map<string, CSPHashed>;
 
 	version: string;
 	gitDescribe: string;
@@ -252,6 +268,7 @@ export function loadConfig(): Config {
 		version,
 		gitCommit,
 		gitDescribe,
+		browserSandboxing: config.browserSandboxing ?? { strictOriginReferrer: true },
 		publishTarballInsteadOfProvideRepositoryUrl: !!config.publishTarballInsteadOfProvideRepositoryUrl,
 		setupPassword: config.setupPassword,
 		url: url.origin,

packages/backend/src/server/ServerService.ts

@@ -89,14 +89,28 @@ export class ServerService implements OnApplicationShutdown {
 			fastify.addHook('onRequest', makeHstsHook(host, preload));
 		}
 
+		// Other Security/Privacy Headers
+		fastify.addHook('onRequest', (_, reply, done) => {
+			reply.header('x-content-type-options', 'nosniff');
+			reply.header('permissions-policy', 'interest-cohort=()'); // Disable FLoC
+			if (this.config.browserSandboxing.strictOriginReferrer) {
+				reply.header('referrer-policy', 'strict-origin');
+			}
+			done();
+		});
+
 		// CSP
-		if (process.env.NODE_ENV === 'production') {
+		if (process.env.NODE_ENV === 'production' && !this.config.browserSandboxing.csp?.disable) {
 			console.debug('cspPrerenderedContent', this.config.cspPrerenderedContent);
 			const generatedCSP = generateCSP(this.config.cspPrerenderedContent, {
 				mediaProxy: this.config.mediaProxy ? `https://${new URL(this.config.mediaProxy).host}` : undefined,
+				script_src: [
+					`https://${new URL(this.config.url).host}/embed_vite/`,
+					`https://${new URL(this.config.url).host}/vite/`,
+				],
 			});
 			fastify.addHook('onRequest', (_, reply, done) => {
-				reply.header('Content-Security-Policy', generatedCSP);
+				reply.header('content-security-policy', generatedCSP);
 				done();
 			});
 		}

packages/backend/src/server/csp.ts

@@ -13,6 +13,8 @@ export type CSPHashed = {
 
 export function generateCSP(hashedMap: Map<string, CSPHashed>, options: {
     mediaProxy?: string,
+    script_src?: string[],
+    append?: { [key: string]: string | string[] },
 }) {
     const keys = Array.from(hashedMap.keys());
     const scripts = keys
@@ -22,7 +24,7 @@ export function generateCSP(hashedMap: Map<string, CSPHashed>, options: {
         .filter(name => name.endsWith('.css'))
         .map(name => `'${hashedMap.get(name)!.integrity}'`);
 
-    return ([
+    const cpolicy = [
         ['default-src', ['\'self\'']],
         ['img-src',
             [
@@ -42,7 +44,11 @@ export function generateCSP(hashedMap: Map<string, CSPHashed>, options: {
         //
         // ref: https://github.com/shikijs/shiki/issues/671
         ['style-src-attr', ['\'self\'', '\'unsafe-inline\'']],
-        ['script-src', ['\'self\'', '\'wasm-unsafe-eval\'', ...scripts]],
+        ['script-src', [
+            ...(options.script_src ? options.script_src : ['\'self\'']),
+            '\'wasm-unsafe-eval\'', 
+            ...scripts
+        ]],
         ['object-src', ['\'none\'']],
         ['base-uri', ['\'self\'']],
         ['form-action', ['\'self\'']],
@@ -52,7 +58,23 @@ export function generateCSP(hashedMap: Map<string, CSPHashed>, options: {
             [
                 ['upgrade-insecure-requests', []],
             ] : []),
-    ] as [string, string[]][])
+    ] as [string, string[]][];
+
+    if (options.append) {
+        for (const [name, values] of Object.entries(options.append)) {
+            if (!values) {
+                continue;
+            }
+            const found = cpolicy.find(([n]) => n === name);
+            if (found) {
+                found[1].push(...(Array.isArray(values) ? values : [values]));
+            } else {
+                cpolicy.push([name, Array.isArray(values) ? values : [values]]);
+            }
+        }
+    }
+
+    return cpolicy
         .map(([name, values]) => {
             return `${name} ${values.join(' ')}`;
         }).join('; ');

packages/backend/src/server/web/ClientServerService.ts

@@ -248,14 +248,28 @@ export class ClientServerService {
 			fastify.addHook('onRequest', makeHstsHook(host, preload));
 		}
 
+		// Other Security/Privacy Headers
+		fastify.addHook('onRequest', (_, reply, done) => {
+			reply.header('x-content-type-options', 'nosniff');
+			reply.header('permissions-policy', 'interest-cohort=()'); // Disable FLoC
+			if (this.config.browserSandboxing.strictOriginReferrer ?? true) {
+				reply.header('referrer-policy', 'strict-origin');
+			}
+			done();
+		});
+
 		// CSP
 		if (process.env.NODE_ENV === 'production') {
 			console.debug('cspPrerenderedContent', this.config.cspPrerenderedContent);
 			const generatedCSP = generateCSP(this.config.cspPrerenderedContent, {
 				mediaProxy: this.config.mediaProxy ? `https://${new URL(this.config.mediaProxy).host}` : undefined,
+				script_src: [
+					`https://${new URL(this.config.url).host}/embed_vite/`,
+					`https://${new URL(this.config.url).host}/vite/`,
+				],
 			});
 			fastify.addHook('onRequest', (_, reply, done) => {
-				reply.header('Content-Security-Policy', generatedCSP);
+				reply.header('content-security-policy', generatedCSP);
 				done();
 			});
 		}