From d49a44384c2471c33d662e9ffbaa351ea454cb0f Mon Sep 17 00:00:00 2001
From: falcon <9504402@qq.com>
Date: Sun, 12 Apr 2020 17:23:54 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=A0=E5=85=A5=E6=B5=8B=E8=AF=95=EF=BC=8C?=
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---
 Falcon.Extend/AESCryptoService.cs           |  4 ++--
 Falcon.ExtendTests/AESCryptoServiceTests.cs | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/Falcon.Extend/AESCryptoService.cs b/Falcon.Extend/AESCryptoService.cs
index 78d330c..ca47cab 100644
--- a/Falcon.Extend/AESCryptoService.cs
+++ b/Falcon.Extend/AESCryptoService.cs
@@ -19,13 +19,13 @@ namespace Falcon.Extend
         public string Encrypt(string content,string key) {
             var encryptKey = GetDecryptKey(key);
             using(var aesAlg = Aes.Create()) {
-                using(var encryptor = aesAlg.CreateEncryptor(encryptKey,aesAlg.IV)) {
+                var iv = aesAlg.IV;
+                using(var encryptor = aesAlg.CreateEncryptor(encryptKey,iv)) {
                     using(var msEncrypt = new MemoryStream()) {
                         using(var csEncrypt = new CryptoStream(msEncrypt,encryptor,CryptoStreamMode.Write))
                         using(var swEncrypt = new StreamWriter(csEncrypt)) {
                             swEncrypt.Write(content);
                         }
-                        var iv = aesAlg.IV;
                         var decryptedContent = msEncrypt.ToArray();
                         var result = new byte[iv.Length + decryptedContent.Length];
                         Buffer.BlockCopy(iv,0,result,0,iv.Length);
diff --git a/Falcon.ExtendTests/AESCryptoServiceTests.cs b/Falcon.ExtendTests/AESCryptoServiceTests.cs
index a0d3b84..edda063 100644
--- a/Falcon.ExtendTests/AESCryptoServiceTests.cs
+++ b/Falcon.ExtendTests/AESCryptoServiceTests.cs
@@ -9,6 +9,9 @@ namespace Falcon.Extend.Tests
     [TestClass()]
     public class AESCryptoServiceTests
     {
+        /// <summary>
+        /// 测试可用性
+        /// </summary>
         [TestMethod()]
         public void EncryptTest() {
             ICryptoService service = new AESCryptoService();
@@ -24,5 +27,21 @@ namespace Falcon.Extend.Tests
                 }
             }
         }
+        /// <summary>
+        /// 测试加密稳定性
+        /// </summary>
+        [TestMethod()]
+        public void EncryptTest2() {
+            ICryptoService service = new AESCryptoService();
+            var m = "aaaaa";
+            var k = "abcd";
+            var m1 = service.Encrypt(m,k);
+            var m2 = service.Encrypt(m,k);
+            Assert.AreNotEqual(m1,m2);
+            var m3 = service.Decrypt(m1,k);
+            var m4 = service.Decrypt(m2,k);
+            Assert.AreEqual(m3,m4);
+            Assert.AreEqual(m,m3);
+        }
     }
 }
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