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最近在跟三方对接 对方采用AES加解密 作为一个资深neter Ctrl CV 是我最大的优点 所以我义正言辞的问他们要了demo 🔗
java demo代码： 🔗
public class EncryptDecryptTool
{
private static final String defaultCharset = "UTF-8";
private static final String KEY_AES = "AES";
private static final String KEY_MD5 = "MD5";
private static MessageDigest md5Digest;
static {
try {
md5Digest = MessageDigest.getInstance(KEY_MD5);
} catch (NoSuchAlgorithmException e) {
//
}
}
public String encrypt(String message, String key) throws Exception
{
return doAES(message, key, Cipher.ENCRYPT_MODE);
}
public String decrypt(String message, String key) throws Exception
{
return doAES(message, key, Cipher.DECRYPT_MODE);
}
/**
* 加解密
*
* @param data
* @param key
* @param mode
* @return
* @throws NoSuchPaddingException
* @throws NoSuchAlgorithmException
*/
private static String doAES(String data, String key, int mode) throws Exception
{
if (StringUtils.isBlank(data) || StringUtils.isBlank(key)) {
return null;
}
boolean encrypt = mode == Cipher.ENCRYPT_MODE;
byte[]
content;
if (encrypt) {
content = data.getBytes(defaultCharset);
} else {
content = Base64.decodeBase64(data.getBytes());
}
SecretKeySpec keySpec = new SecretKeySpec(md5Digest.digest(key.getBytes(defaultCharset)), KEY_AES);
Cipher cipher = Cipher.getInstance(KEY_AES);// 创建密码器
cipher.init(mode, keySpec);// 初始化
byte[] result = cipher.doFinal(content);
if (encrypt) {
return new String(Base64.encodeBase64(result, false), defaultCharset);
} else {
return new String(result, defaultCharset);
}
}
}
EncryptDecryptTool tool = new EncryptDecryptTool();
try
{
//这里key的位数是个坑 之前找的一堆资料 java C#通用版啥的 都说key一定要是16位的 结果后来我发现 靠
String msg = tool.decrypt("{\"Name\":\"20180122T155221\",\"OrderNo\":\"Test1000012059021180000008153\"}", "64个英文字母");
System.out.println(msg);
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
哇咔咔 这不是大名鼎鼎的java嘛 但这难不倒我 不是还有IKVM 照样Ctrl CV 🔗
新建一个.NET Standard项目NuGet 安装IKVM 🔗
C#主要代码 🔗
public class EncryptDecryptTool
{
private static readonly string KEY_AES = "AES";
private static readonly string KEY_MD5 = "MD5";
private static MessageDigest md5Digest;
static EncryptDecryptTool()
{
try
{
md5Digest = MessageDigest.getInstance(KEY_MD5);
}
catch (NoSuchAlgorithmException e)
{
//
}
}
public string encrypt(string message, string key)
{
return doAES(message, key, Cipher.ENCRYPT_MODE);
}
public string decrypt(string message, string key)
{
return doAES(message, key, Cipher.DECRYPT_MODE);
}
/// <summary>
///
/// </summary>
/// <param name="data"></param>
/// <param name="key"></param>
/// <param name="mode"></param>
/// <returns></returns>
private static string doAES(string data, string key, int mode)
{
bool encrypt = mode == Cipher.ENCRYPT_MODE;
byte[] content;
if (encrypt)
{
content = Encoding.UTF8.GetBytes(data);
}
else
{
content = Convert.FromBase64String(data);
}
SecretKeySpec keySpec = new SecretKeySpec(md5Digest.digest(Encoding.UTF8.GetBytes(key)), KEY_AES);
Cipher cipher = Cipher.getInstance(KEY_AES);// 创建密码器
cipher.init(mode, keySpec);// 初始化
byte[] result = cipher.doFinal(content);
if (encrypt)
{
return Convert.ToBase64String(result);
}
else
{
return Encoding.UTF8.GetString(result);
}
}
}
static void Main(string[] args)
{
var encryptDecryptTool = new EncryptDecryptTool();
Console.WriteLine(encryptDecryptTool.encrypt("jack","64位密钥"));
}
运行NetCore控制台 🔗
这是Net Framework Net Core以及IKVM不得不说的故事了 但是下午就要联调了 总不能给三方讲一千零一夜 没事这难不倒我 新建一个Net Framework控制台 🔗
static void Main(string[] args)
{
try
{
var argsLength = args.Length;
if (argsLength > 1)
{
EncryptDecryptTool tool = new EncryptDecryptTool();
string result = string.Empty;
if (args[0] == "encrypt")
{
result = tool.encrypt(args[1]);
}
else
{
result = tool.decrypt(args[1]);
}
Console.WriteLine(result);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
Net Core调用 🔗
string path = @"D:\WebSite\AESTool.exe";
var method="encrypt";
var msg="this is msg";
string fileName = path;
Process p = new Process();
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.FileName = fileName;
p.StartInfo.CreateNoWindow = true;
p.StartInfo.Arguments = $"{method} {msg}";//参数以空格分隔
p.Start();
var output = await p.StandardOutput.ReadToEndAsync();
测试ok 没问题 就是时间有点久 加密解密每次差不多都要一秒 🔗
就这样跑了一段时间 今天闲下来 想起上次的一秒
嗯 写好辞职申请 备份 好的 我要开始重构了 嗯 知己知彼百战不殆 那我们先去维密上大概了解一下AES 🔗
好吧 我知道你也没看懂
我们还是看代码吧 作为一个资深程序员的直觉 🔗
之前查了一堆资料 都说java C# AES加解密通用版 key的位都必须是16位 害的笨菜鸟陷入了思维误区 我们再看上面那段代码 Debug进去看 发现是用MD5算法根据key生成长度16的byte数据 16啊 多么敏感的数字 就是哈希计算 靠 🔗
果断google，Ctrl CV 🔗
public static class EncryptDecryptTool
{
private const string key = "qCOHfwhXgsZFBFSeZeGOlXtZbKOzApLBuZoWxrQjcmoxYHfrWZzdyFbvGuMcZqmC";
/// <summary>
/// MD5哈希计算
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static byte[] ConvertStringToMD5(string key)
{
byte[] ByteData = Encoding.UTF8.GetBytes(key);
MD5 oMd5 = MD5.Create();
byte[] HashData = oMd5.ComputeHash(ByteData);
return HashData;
}
/// <summary>
/// AES加密
/// </summary>
/// <param name="toEncrypt"></param>
/// <returns></returns>
public static string Encrypt(string toEncrypt)
{
byte[] keyArray = ConvertStringToMD5(key);
byte[] toEncryptArray = Encoding.UTF8.GetBytes(toEncrypt);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="toDecrypt"></param>
/// <returns></returns>
public static string Decrypt(string toDecrypt)
{
byte[] keyArray = ConvertStringToMD5(key);
byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Encoding.UTF8.GetString(resultArray);
}