From 60a8b8eda843b794733bc62bb66908b4f9c73e60 Mon Sep 17 00:00:00 2001
From: falcon <9504402@qq.com>
Date: Fri, 1 Mar 2019 17:01:53 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=8A=A0=E5=AF=86=E8=A7=A3?=
 =?UTF-8?q?=E5=AF=86=E5=B8=AE=E5=8A=A9=E7=B1=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 WebSiteCode/Cmdjy/Cmdjy/Bll/DesHelper.cs | 102 +++++++++++++++++++++++
 WebSiteCode/Cmdjy/Cmdjy/Cmdjy.csproj     |   2 +-
 2 files changed, 103 insertions(+), 1 deletion(-)
 create mode 100644 WebSiteCode/Cmdjy/Cmdjy/Bll/DesHelper.cs

diff --git a/WebSiteCode/Cmdjy/Cmdjy/Bll/DesHelper.cs b/WebSiteCode/Cmdjy/Cmdjy/Bll/DesHelper.cs
new file mode 100644
index 0000000..acfc1b9
--- /dev/null
+++ b/WebSiteCode/Cmdjy/Cmdjy/Bll/DesHelper.cs
@@ -0,0 +1,102 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Cmdjy.Bll
+{
+    /// <summary>
+    /// 加密帮助类
+    /// </summary>
+    public class DesHelper
+    {
+        /// <summary>
+        /// 补位填充方式
+        /// </summary>
+        public PaddingMode Padding { get; set; }
+        /// <summary>
+        /// 加密算法模式
+        /// </summary>
+        public CipherMode Cipher { get; set; }
+        /// <summary>
+        /// 初始化向量
+        /// </summary>
+        public byte[] IV { get; set; }
+        /// <summary>
+        /// 加密key
+        /// </summary>
+        public string Key { get; set; }
+        /// <summary>
+        /// 加密字符串获取Base64密文
+        /// </summary>
+        /// <param name="str">要加密的字符串</param>
+        public string Encrypty(string str) {
+            byte[] bKey = Encoding.UTF8.GetBytes(Key.Substring(0,8));
+            byte[] bStr = Encoding.UTF8.GetBytes(str);
+            var desc = createProvider();
+            using(var mStream = new MemoryStream()) {
+                using(var cStream = new CryptoStream(mStream,desc.CreateEncryptor(bKey,IV),CryptoStreamMode.Write)) {
+                    cStream.Write(bStr,0,bStr.Length);
+                    cStream.FlushFinalBlock();
+                    return Convert.ToBase64String(mStream.ToArray());
+                }
+            }
+        }
+        /// <summary>
+        /// 从Base64密文解密，获取字符串
+        /// </summary>
+        /// <param name="str">密文</param>
+        /// <returns></returns>
+        public string DesCrypty(string str) {
+            var bStr = Convert.FromBase64String(str);
+            byte[] bKey = Encoding.UTF8.GetBytes(Key.Substring(0,8));
+            var desc = createProvider();
+            using(var mStream = new MemoryStream()) {
+                using(var cStream = new CryptoStream(mStream,desc.CreateDecryptor(bKey,IV),CryptoStreamMode.Write)) {
+                    cStream.Write(bStr,0,bStr.Length);
+                    cStream.FlushFinalBlock();
+                    return Encoding.UTF8.GetString(mStream.ToArray());
+                }
+            }
+        }
+
+        private DESCryptoServiceProvider createProvider() {
+            var desc = new DESCryptoServiceProvider();
+            desc.Padding = this.Padding;
+            desc.Mode = this.Cipher;
+            return desc;
+        }
+
+        private static DesHelper _deshelper { get; set; }
+
+        private DesHelper() { }
+
+        /// <summary>
+        /// 重用模式获取默认加密帮助器
+        /// </summary>
+        public static DesHelper GetHelper() {
+            if(_deshelper == null) {
+                var key = "";
+                byte[] IV = { 0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08 };
+                _deshelper = GetHelper(PaddingMode.PKCS7,CipherMode.CBC,IV,key);
+
+            }
+            return _deshelper;
+        }
+        /// <summary>
+        /// 生成新的加密帮助器
+        /// </summary>
+        /// <param name="padding">补位方式</param>
+        /// <param name="cipher">加密算法模式</param>
+        /// <param name="IV">初始化向量</param>
+        /// <param name="key">加密关键字</param>
+        public static DesHelper GetHelper(PaddingMode padding,CipherMode cipher,byte[] IV,string key) {
+            if(key.Length <= 8) {
+                throw new Exception("加密用的key长度为8位");
+            }
+            return new DesHelper {
+                Cipher = cipher,IV = IV,Key = key,Padding = padding,
+            };
+        }
+    }
+}
\ No newline at end of file
diff --git a/WebSiteCode/Cmdjy/Cmdjy/Cmdjy.csproj b/WebSiteCode/Cmdjy/Cmdjy/Cmdjy.csproj
index 499ffe4..05255ad 100644
--- a/WebSiteCode/Cmdjy/Cmdjy/Cmdjy.csproj
+++ b/WebSiteCode/Cmdjy/Cmdjy/Cmdjy.csproj
@@ -153,6 +153,7 @@
     <Compile Include="App_Start\BundleConfig.cs" />
     <Compile Include="App_Start\FilterConfig.cs" />
     <Compile Include="App_Start\RouteConfig.cs" />
+    <Compile Include="Bll\DesHelper.cs" />
     <Compile Include="Dal\Wappers\HisDrugInfoWapper.cs" />
     <Compile Include="Dal\Wappers\HisPrescriptyInfoWapper.cs" />
     <Compile Include="Controllers\HomeController.cs" />
@@ -218,7 +219,6 @@
   </ItemGroup>
   <ItemGroup>
     <Folder Include="App_Data\" />
-    <Folder Include="Bll\" />
     <Folder Include="Models\" />
     <Folder Include="Views\Test\" />
   </ItemGroup>