Flutter 项目实战 网络请求MD5+时间戳+验证签名 十一

import 'package:crypto/crypto.dart';
import 'package:convert/convert.dart';

class SecurityService {
  String generateTimestamp() {
    // 生成当前时间的时间戳
    return ((DateTime.now().millisecondsSinceEpoch) / 1000).toString();
  }

  String generateSignature(String timestamp, String secretKey) {
    // 按照时间戳+秘钥的方式生成签名
    String signatureString = '$timestamp$secretKey';
    // 对字符串进行MD5加密
    var content = new Utf8Encoder().convert(signatureString);
    var digest = md5.convert(content);
    // 将加密结果转换为16进制字符串
    return hex.encode(digest.bytes);
  }
}

// 使用示例
void main() {
  SecurityService securityService = SecurityService();
  String timestamp = securityService.generateTimestamp();
  String secretKey = 'your_secret_key';
  String signature = securityService.generateSignature(timestamp, secretKey);

  print('Timestamp: $timestamp');
  print('Signature: $signature');
}