新增加密工具类

+import { cryptoFramework } from '@kit.CryptoArchitectureKit';
+import { util } from '@kit.ArkTS';
+
+const TAG: string = '[AesUtils]'
+/**
+ * ASE密钥 TODO 示例密钥，业务需要按实际密钥修改
+ */
+const AES_ENCRYPT_KEY: string = '5QXzAbJj0TJN9OQNvxFhhw==';
+const AES128: string = 'AES128';
+const AES128_ECB_PKCS5: string = 'AES128|ECB|PKCS5';  // 'AES128|PKCS5';
+
+/**
+ * AES加密/解密
+ */
+export class AesUtils {
+  static stringToUint8Array(str: string) {
+    let arr: number[] = new Array();
+    for (let i = 0, j = str.length; i < j; ++i) {
+      arr.push(str.charCodeAt(i));
+    }
+    let tmpArray = new Uint8Array(arr);
+    return tmpArray;
+  }
+
+  static uint8ArrayToString(array: Uint8Array): string {
+    let arrayString = '';
+    for (let i = 0; i < array.length; i++) {
+      arrayString += String.fromCharCode(array[i]);
+    }
+    return arrayString;
+  }
+
+  /**
+   * aes加密
+   * @param message
+   * @param callback
+   */
+  static async aesEncrypt(message: string, secretKey?: string): Promise<string> {
+    // Logger.debug(TAG, `aesEncrypt message: ${message}`);
+    // 组装convertKey所需的二进制密钥数据
+    let base64Helper = new util.Base64Helper();
+    let pubKey = base64Helper.decodeSync(secretKey ?? AES_ENCRYPT_KEY); // AES密钥
+    let pubKeyBlob: cryptoFramework.DataBlob = { data: pubKey };
+    // 创建对称密钥生成器
+    let aesGenerator = cryptoFramework.createSymKeyGenerator(AES128);
+    // 转换/生成对称密钥对象
+    let symKey: cryptoFramework.SymKey = await aesGenerator.convertKey(pubKeyBlob)
+    // 生成加解密生成器
+    let cipher = cryptoFramework.createCipher(AES128_ECB_PKCS5);
+    // 初始化加密
+    await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, null)
+    // 封装加密所需数据
+    let input: cryptoFramework.DataBlob = { data: AesUtils.stringToUint8Array(message) };
+    // 当数据量较小时，可以在init完成后直接调用doFinal
+    // 当数据量较大时，可以多次调用update，即分段加解密。
+    let output: cryptoFramework.DataBlob = await cipher.doFinal(input)
+    // Logger.info(TAG, "aesEncrypt output.data is " + output.data);
+    let result = base64Helper.encodeToStringSync(output?.data)
+    // Logger.info(TAG, "aesEncrypt result is " + result);
+    return result;
+  }
+
+  /**
+   * aes解密
+   * @param message
+   * @param callback
+   */
+  static async aesDecrypt(message: string, secretKey?: string): Promise<string> {
+    // Logger.debug(TAG, `aesDecrypt message: ${message}`);
+    // 组装convertKey所需的二进制密钥数据
+    let base64Helper = new util.Base64Helper();
+    let pubKey = base64Helper.decodeSync(secretKey ?? AES_ENCRYPT_KEY); // AES密钥
+    let pubKeyBlob: cryptoFramework.DataBlob = { data: pubKey };
+    // 创建对称密钥生成器
+    let aesGenerator = cryptoFramework.createSymKeyGenerator(AES128);
+    // 转换/生成对称密钥对象
+    let symKey: cryptoFramework.SymKey = await aesGenerator.convertKey(pubKeyBlob)
+    //  生成加解密生成器
+    let cipher = cryptoFramework.createCipher(AES128_ECB_PKCS5);
+    // 初始化加密
+    await cipher.init(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, null)
+    // 封装加密所需数据
+    let newMessage = base64Helper.decodeSync(message);
+    let input: cryptoFramework.DataBlob = { data: newMessage };
+    // 当数据量较小时，可以在init完成后直接调用doFinal
+    // 当数据量较大时，可以多次调用update，即分段加解密。
+    let output: cryptoFramework.DataBlob = await cipher.doFinal(input)
+    // Logger.debug(TAG, "aesDecrypt is output.data " + output?.data);
+    let result = AesUtils.uint8ArrayToString(output?.data)
+    // Logger.debug(TAG, "aesDecrypt result is " + result);
+    return result
+  }
+}