fix api ui, add versions

Helpers/SimApiAesUtil.cs

@@ -0,0 +1,119 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace SimApi.Helpers;
+
+public static class SimApiAesUtil
+{
+    // 密钥长度：256位 (32字节)
+    private const int KeySize = 256;
+
+    // 块大小：128位 (16字节)
+    private const int BlockSize = 128;
+
+    // 加密模式 - 重命名以避免与枚举类型冲突
+    private const CipherMode AesCipherMode = CipherMode.CBC;
+
+    // 填充模式 - 重命名以避免与枚举类型冲突
+    private const PaddingMode AesPaddingMode = PaddingMode.PKCS7;
+
+    /// <summary>
+    /// AES 加密
+    /// </summary>
+    /// <param name="plainText">明文</param>
+    /// <param name="key">字符串密钥（将被处理为256位）</param>
+    /// <returns>加密后的Base64字符串（包含IV）</returns>
+    public static string Encrypt(string plainText, string key)
+    {
+        if (string.IsNullOrEmpty(plainText))
+            throw new ArgumentNullException(nameof(plainText));
+        if (string.IsNullOrEmpty(key))
+            throw new ArgumentNullException(nameof(key));
+
+        // 处理密钥为指定长度
+        var keyBytes = ProcessKey(key);
+        // 生成随机IV
+        var iv = GenerateRandomIv();
+
+        using var aes = CreateAesProvider(keyBytes, iv);
+        using var encryptor = aes.CreateEncryptor(aes.Key, aes.IV);
+        using var ms = new MemoryStream();
+        // 先写入IV，解密时需要用到
+        ms.Write(iv, 0, iv.Length);
+
+        using (var cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
+        using (var sw = new StreamWriter(cs))
+        {
+            sw.Write(plainText);
+        }
+
+        return Convert.ToBase64String(ms.ToArray());
+    }
+
+    /// <summary>
+    /// AES 解密
+    /// </summary>
+    /// <param name="cipherText">加密后的Base64字符串</param>
+    /// <param name="key">字符串密钥（与加密时相同）</param>
+    /// <returns>解密后的明文</returns>
+    public static string Decrypt(string cipherText, string key)
+    {
+        if (string.IsNullOrEmpty(cipherText))
+            throw new ArgumentNullException(nameof(cipherText));
+        if (string.IsNullOrEmpty(key))
+            throw new ArgumentNullException(nameof(key));
+
+        var cipherBytes = Convert.FromBase64String(cipherText);
+
+        // 从加密数据中提取IV
+        var iv = new byte[BlockSize / 8];
+        Array.Copy(cipherBytes, 0, iv, 0, iv.Length);
+
+        // 处理密钥为指定长度
+        var keyBytes = ProcessKey(key);
+
+        using var aes = CreateAesProvider(keyBytes, iv);
+        using var decryptor = aes.CreateDecryptor(aes.Key, aes.IV);
+        using var ms = new MemoryStream(cipherBytes, iv.Length, cipherBytes.Length - iv.Length);
+        using var cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read);
+        using var sr = new StreamReader(cs);
+        return sr.ReadToEnd();
+    }
+
+    /// <summary>
+    /// 处理密钥为指定长度（256位）
+    /// </summary>
+    private static byte[] ProcessKey(string key)
+    {
+        // 使用SHA256哈希处理密钥，确保得到32字节(256位)的密钥
+        return SHA256.HashData(Encoding.UTF8.GetBytes(key));
+    }
+
+    /// <summary>
+    /// 生成随机初始化向量
+    /// </summary>
+    private static byte[] GenerateRandomIv()
+    {
+        using var aes = Aes.Create();
+        aes.BlockSize = BlockSize;
+        aes.GenerateIV();
+        return aes.IV;
+    }
+
+    /// <summary>
+    /// 创建并配置AES加密服务提供器
+    /// </summary>
+    private static Aes CreateAesProvider(byte[] key, byte[] iv)
+    {
+        var aes = Aes.Create();
+        aes.KeySize = KeySize;
+        aes.BlockSize = BlockSize;
+        aes.Mode = AesCipherMode;
+        aes.Padding = AesPaddingMode;
+        aes.Key = key;
+        aes.IV = iv;
+        return aes;
+    }
+}