SSO auth (1)

src/auth/auth.utils.ts

@@ -0,0 +1,30 @@
+import { createHash, randomBytes } from 'crypto';
+import type { SsoProvider } from './dto/sso-provider';
+
+export function randomOpaqueToken(size = 32): string {
+  return randomBytes(size).toString('base64url');
+}
+
+export function sha256(value: string): string {
+  return createHash('sha256').update(value).digest('hex');
+}
+
+export function isLoopbackRedirect(value: string): boolean {
+  try {
+    const parsed = new URL(value);
+    return (
+      (parsed.protocol === 'http:' || parsed.protocol === 'https:') &&
+      ['127.0.0.1', 'localhost'].includes(parsed.hostname)
+    );
+  } catch {
+    return false;
+  }
+}
+
+export function asProviderName(value: SsoProvider): 'GOOGLE' | 'DISCORD' {
+  return value === 'google' ? 'GOOGLE' : 'DISCORD';
+}
+
+export function normalizeEmail(email: string): string {
+  return email.trim().toLowerCase();
+}