基线 SVN r240

SVN-Revision: r240
2025-02-06 06:46:06 +00:00
commit ab56a9bcf7
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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Security.Cryptography;
+
+namespace LSServerService
+{
+    /// <summary>
+    /// AES对称加密
+    /// </summary>
+    public class AESUtil
+    {
+        private static string key = "lserpasebygyc222";
+
+        #region AES加解密
+        /// <summary>
+        ///AES加密（加密步骤）
+        ///1，加密字符串得到2进制数组；
+        ///2，将2进制数组转为16进制；
+        ///3，进行base64编码
+        /// </summary>
+        /// <param name="toEncrypt">要加密的字符串</param>
+        /// <param name="key">密钥</param>
+        public static string Encrypt(string toEncrypt)
+        {
+            if (string.IsNullOrEmpty(toEncrypt)) return "";
+            byte[] _key = Encoding.ASCII.GetBytes(key);
+            byte[] _source = Encoding.UTF8.GetBytes(toEncrypt);
+
+            Aes aes = Aes.Create("AES");
+            aes.Mode = CipherMode.ECB;
+            aes.Padding = PaddingMode.PKCS7;
+            aes.Key = _key;
+            ICryptoTransform cTransform = aes.CreateEncryptor();
+            byte[] cryptData = cTransform.TransformFinalBlock(_source, 0, _source.Length);
+            string hexCryptString = Hex_2To16(cryptData);
+            byte[] hexCryptData = Encoding.UTF8.GetBytes(hexCryptString);
+            return Convert.ToBase64String(hexCryptData);
+        }
+
+        /// <summary>
+        /// AES解密（解密步骤）
+        /// 1，将BASE64字符串转为16进制数组
+        /// 2，将16进制数组转为字符串
+        /// 3，将字符串转为2进制数据
+        /// 4，用AES解密数据
+        /// </summary>
+        /// <param name="encryptedSource">已加密的内容</param>
+        /// <param name="key">密钥</param>
+        public static string Decrypt(string toDecrypt)
+        {
+            if (string.IsNullOrEmpty(toDecrypt)) return "";
+            try
+            {
+                byte[] _key = Encoding.ASCII.GetBytes(key);
+                Aes aes = Aes.Create("AES");
+                aes.Mode = CipherMode.ECB;
+                aes.Padding = PaddingMode.PKCS7;
+                aes.Key = _key;
+                ICryptoTransform cTransform = aes.CreateDecryptor();
+
+                byte[] encryptedData = Convert.FromBase64String(toDecrypt);
+                string encryptedString = Encoding.UTF8.GetString(encryptedData);
+                byte[] _source = Hex_16To2(encryptedString);
+                byte[] originalSrouceData = cTransform.TransformFinalBlock(_source, 0, _source.Length);
+                return Encoding.UTF8.GetString(originalSrouceData);
+            }
+            catch (Exception)
+            {
+                return "";
+            }
+        }
+
+        /// <summary>
+        /// 2进制转16进制
+        /// </summary>
+        static string Hex_2To16(byte[] bytes)
+        {
+            string hexString = string.Empty;
+            Int32 iLength = 65535;
+            if (bytes != null)
+            {
+                StringBuilder strB = new StringBuilder();
+
+                if (bytes.Length < iLength)
+                {
+                    iLength = bytes.Length;
+                }
+
+                for (int i = 0; i < iLength; i++)
+                {
+                    strB.Append(bytes[i].ToString("X2"));
+                }
+                hexString = strB.ToString();
+            }
+            return hexString;
+        }
+
+        /// <summary>
+        /// 16进制转2进制
+        /// </summary>
+        static byte[] Hex_16To2(string hexString)
+        {
+            if ((hexString.Length % 2) != 0)
+            {
+                hexString += " ";
+            }
+            byte[] returnBytes = new Byte[hexString.Length / 2];
+            for (Int32 i = 0; i < returnBytes.Length; i++)
+            {
+                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
+            }
+            return returnBytes;
+        }
+        #endregion
+    }
+}