flutter开发AES加密、SHA-1验签、base64加密、请求参数按key按ASCII排序key1=value1&key2=value2&...&keyN=valueN_flutter解密ios的加密数据

1、AES用的是encrypt

static String aesKey = 'sxcbk2gFGcODQp0daccgAh==';
  //AES加密
  static String aesEncode(String content) {
    try {
      final key = Key.fromUtf8(base64Encode(aesKey.codeUnits));
      final encrypter = Encrypter(AES(key, mode: AESMode.ecb));
      final encrypted = encrypter.encrypt(content, iv: IV.fromLength(16));
      return encrypted.base64;
    } catch (err) {
      print("aes encode error:$err");
      return content;
    }
  }
 
  //AES解密
  static dynamic aesDecode(dynamic base64) {
    try {
      final key = Key.fromUtf8(base64Encode(aesKey.codeUnits));
      final encrypter = Encrypter(AES(key, mode: AESMode.ecb));
      return encrypter.decrypt64(base64, iv: IV.fromLength(16));
    } catch (err) {
      print("aes decode error:$err");
      return base64;
    }
  }

2、SHA-1使用的是crypto

String sign = sha1.convert(utf8.encode(str)).toString();

3、请求参数按key按ASCII排序key1=value1&key2=value2&...&keyN=valueN

List attrKeys = paramMap.keys.toList();
      attrKeys.sort(); //排序 ASCII 字符顺序进行排序
      var str = '';
      for (var i = 0; i < paramMap.length; i++) {
        if (i == paramMap.length - 1) {
          str += "${attrKeys[i]}=${paramMap[attrKeys[i]]}";
        } else {
          str += "${attrKeys[i]}=${paramMap[attrKeys[i]]}&";
        }
      }
      print(str);