feat: 新增共享加密包并引入 ZIP/PGP 依赖

packages/crypto/src/hmac.ts

@@ -0,0 +1,23 @@
+import { createHmac } from 'node:crypto'
+
+/**
+ * Compute HMAC-SHA256 and return Base64-encoded signature.
+ *
+ * @param key - HMAC key (Buffer)
+ * @param data - Data to sign (UTF-8 string)
+ * @returns Base64-encoded HMAC-SHA256 signature
+ */
+export const hmacSha256Base64 = (key: Buffer, data: string): string => {
+  return createHmac('sha256', key).update(data, 'utf-8').digest('base64')
+}
+
+/**
+ * Compute HMAC-SHA256 and return raw Buffer.
+ *
+ * @param key - HMAC key (Buffer)
+ * @param data - Data to sign (UTF-8 string)
+ * @returns HMAC-SHA256 digest as Buffer
+ */
+export const hmacSha256 = (key: Buffer, data: string): Buffer => {
+  return createHmac('sha256', key).update(data, 'utf-8').digest()
+}