update

lib/utils/crypto_helper.dart

@@ -0,0 +1,28 @@
+import 'dart:convert';
+
+import 'package:encrypt/encrypt.dart';
+import 'package:crypto/crypto.dart';
+
+class CryptoHelper {
+  static IV iv = IV.fromLength(16);
+
+  /// 初始化加密
+  static Encrypter initEncrypter(String password) {
+    final List<int> bytes = utf8.encode(password);
+    final Digest md5Bytes = md5.convert(bytes);
+    final Key key = Key.fromUtf8(md5Bytes.toString());
+    return Encrypter(AES(key, mode: AESMode.ecb));
+  }
+
+  /// AES 加密
+  static String encryptAes(String plainText, String password) {
+    Encrypter encrypter = CryptoHelper.initEncrypter(password);
+    return encrypter.encrypt(plainText, iv: iv).base64;
+  }
+
+  /// AES 解密
+  static String decryptAes(String encrypted, String password) {
+    Encrypter encrypter = CryptoHelper.initEncrypter(password);
+    return encrypter.decrypt16(encrypted, iv: iv);
+  }
+}