feat(crypto): add certificate hash generation and verification functions

- Implemented `generateCertificateHash` to create a hash using HMAC-SHA256 based on user ID and team ID.
- Added `verifyCertificateHash` to validate a given certificate ID against generated hash.
- Introduced `crypto-js` library as a dependency for cryptographic functions.

chore(deps): update ajv to version 8.13.0 and add crypto-js dependency

- Updated `ajv` from version 6.12.6 to 8.13.0 in package.json and package-lock.json.
- Added `crypto-js` library to package.json for cryptographic operations.
- Included type definitions for `crypto-js` in development dependencies.

libs/utils/src/index.ts

@@ -7,3 +7,5 @@ export * from './cookies';
 export * from './session';
 export * from './constants';
 export * from './logic';
+export * from './lib/crypto';
+export * from './lib/certificate';

libs/utils/src/lib/certificate.ts

@@ -0,0 +1,18 @@
+import { generateCertificateHash } from './crypto';
+
+/**
+ * Generate a certificate URL for a user and team
+ * @param userId - User ID
+ * @param teamId - Team ID
+ * @param baseUrl - Base URL (optional, defaults to current origin)
+ * @returns Certificate URL
+ */
+export const generateCertificateUrl = (
+  userId: string,
+  teamId: string,
+  baseUrl?: string
+): string => {
+  const certId = generateCertificateHash(userId, teamId);
+  const base = baseUrl || (typeof window !== 'undefined' ? window.location.origin : '');
+  return `${base}/certificate/${certId}`;
+};

libs/utils/src/lib/crypto.ts

@@ -0,0 +1,31 @@
+import CryptoJS from 'crypto-js';
+
+/**
+ * Generate certificate hash using HMAC-SHA256
+ * @param userId - User ID
+ * @param teamId - Team ID
+ * @returns Hash string
+ */
+export const generateCertificateHash = (userId: string, teamId: string): string => {
+  const key = 'imphnenxkolosal';
+  const message = userId + teamId;
+
+  // Repeat key to match required length (32 bytes for SHA256)
+  const repeatedKey = key.repeat(Math.ceil(32 / key.length)).substring(0, 32);
+
+  // Create HMAC-SHA256 hash
+  const hash = CryptoJS.HmacSHA256(message, repeatedKey);
+  return hash.toString(CryptoJS.enc.Hex);
+};
+
+/**
+ * Verify if a certificate hash is valid for a given user and team
+ * @param certId - Certificate ID to verify
+ * @param userId - User ID
+ * @param teamId - Team ID
+ * @returns True if the certificate is valid
+ */
+export const verifyCertificateHash = (certId: string, userId: string, teamId: string): boolean => {
+  const generatedHash = generateCertificateHash(userId, teamId);
+  return generatedHash === certId;
+};