在调试中的加密操作期间发生错误

时间:2016-01-07 08:10:52

标签: c#

我收到以下错误。这似乎只是在我升级我的visual studio 2015以进行第一次更新后才开始。我在这里读过一些关于机器密钥问题的线程吗?我不知道如何解决它并防止它。目前,当我使用IIS express在调试中运行时,我在本地计算机上收到此错误。

Exception Details: System.Security.Cryptography.CryptographicException: Error occurred during a cryptographic operation.

Cache = db.UserTokenCacheList.FirstOrDefault(c => c.webUserUniqueId == userId);

// place the entry in memory
this.Deserialize((Cache == null) ? null : MachineKey.Unprotect(Cache.cacheBits,"ADALCache"));


[CryptographicException: Error occurred during a cryptographic operation.]
   System.Web.Security.Cryptography.HomogenizingCryptoServiceWrapper.HomogenizeErrors(Func`2 func, Byte[] input) +115
   System.Web.Security.Cryptography.HomogenizingCryptoServiceWrapper.Unprotect(Byte[] protectedData) +70
   System.Web.Security.MachineKey.Unprotect(ICryptoServiceProvider cryptoServiceProvider, Byte[] protectedData, String[] purposes) +62
   System.Web.Security.MachineKey.Unprotect(Byte[] protectedData, String[] purposes) +121
   LEDES.Models.ADALTokenCache..ctor(String signedInUserId) in C:\Users\RLewis\Source\Workspaces\Workspace\LEDES\LEDES\Models\AdalTokenCache.cs:28
   LEDES.Startup.<ConfigureAuth>b__7_0(AuthorizationCodeReceivedNotification context) in C:\Users\RLewis\Source\Workspaces\Workspace\LEDES\LEDES\App_Start\Startup.Auth.cs:54
   Microsoft.Owin.Security.OpenIdConnect.<AuthenticateCoreAsync>d__1a.MoveNext() +4388
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +26
   Microsoft.Owin.Security.OpenIdConnect.<AuthenticateCoreAsync>d__1a.MoveNext() +5776
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() +28
   Microsoft.Owin.Security.Infrastructure.<BaseInitializeAsync>d__0.MoveNext() +471
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Runtime.CompilerServices.TaskAwaiter.GetResult() +26
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +218
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Runtime.CompilerServices.TaskAwaiter.GetResult() +26
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<RunApp>d__5.MoveNext() +170
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Runtime.CompilerServices.TaskAwaiter.GetResult() +26
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +525
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Runtime.CompilerServices.TaskAwaiter.GetResult() +26
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<RunApp>d__5.MoveNext() +170
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Runtime.CompilerServices.TaskAwaiter.GetResult() +26
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<DoFinalWork>d__2.MoveNext() +166
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +26
   Microsoft.Owin.Host.SystemWeb.Infrastructure.ErrorState.Rethrow() +26
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar) +81
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult ar) +30
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +380
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

以下是失败的代码 - 当我在设置项目时选择Azure身份验证时,这是由VS生成的。

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Security;
using Microsoft.IdentityModel.Clients.ActiveDirectory;

namespace LEDES.Models
{
    public class ADALTokenCache : TokenCache
    {
        private ApplicationDbContext db = new ApplicationDbContext();
        private string userId;
        private UserTokenCache Cache;

        public ADALTokenCache(string signedInUserId)
        {
            // associate the cache to the current user of the web app
            userId = signedInUserId;
            this.AfterAccess = AfterAccessNotification;
            this.BeforeAccess = BeforeAccessNotification;
            this.BeforeWrite = BeforeWriteNotification;
            // look up the entry in the database
            Cache = db.UserTokenCacheList.FirstOrDefault(c => c.webUserUniqueId == userId);
            // place the entry in memory
            this.Deserialize((Cache == null) ? null : MachineKey.Unprotect(Cache.cacheBits,"ADALCache"));
        }

        // clean up the database
        public override void Clear()
        {
            base.Clear();
            var cacheEntry = db.UserTokenCacheList.FirstOrDefault(c => c.webUserUniqueId == userId);
            db.UserTokenCacheList.Remove(cacheEntry);
            db.SaveChanges();
        }

        // Notification raised before ADAL accesses the cache.
        // This is your chance to update the in-memory copy from the DB, if the in-memory version is stale
        void BeforeAccessNotification(TokenCacheNotificationArgs args)
        {
            if (Cache == null)
            {
                // first time access
                Cache = db.UserTokenCacheList.FirstOrDefault(c => c.webUserUniqueId == userId);
            }
            else
            { 
                // retrieve last write from the DB
                var status = from e in db.UserTokenCacheList
                             where (e.webUserUniqueId == userId)
                select new
                {
                    LastWrite = e.LastWrite
                };

                // if the in-memory copy is older than the persistent copy
                if (status.First().LastWrite > Cache.LastWrite)
                {
                    // read from from storage, update in-memory copy
                    Cache = db.UserTokenCacheList.FirstOrDefault(c => c.webUserUniqueId == userId);
                }
            }
            this.Deserialize((Cache == null) ? null : MachineKey.Unprotect(Cache.cacheBits, "ADALCache"));
        }

        // Notification raised after ADAL accessed the cache.
        // If the HasStateChanged flag is set, ADAL changed the content of the cache
        void AfterAccessNotification(TokenCacheNotificationArgs args)
        {
            // if state changed
            if (this.HasStateChanged)
            {
                Cache = new UserTokenCache
                {
                    webUserUniqueId = userId,
                    cacheBits = MachineKey.Protect(this.Serialize(), "ADALCache"),
                    LastWrite = DateTime.Now
                };
                // update the DB and the lastwrite 
                db.Entry(Cache).State = Cache.UserTokenCacheId == 0 ? EntityState.Added : EntityState.Modified;
                db.SaveChanges();
                this.HasStateChanged = false;
            }
        }

        void BeforeWriteNotification(TokenCacheNotificationArgs args)
        {
            // if you want to ensure that no concurrent write take place, use this notification to place a lock on the entry
        }

        public override void DeleteItem(TokenCacheItem item)
        {
            base.DeleteItem(item);
        }
    }
}

来自调用堆栈的信息以及发生CryptographicEsception的信息

    System.Web.dll!System.Web.Security.Cryptography.HomogenizingCryptoServiceWrapper.HomogenizeErrors(System.Func<byte[], byte[]> func, byte[] input)   Unknown
    System.Web.dll!System.Web.Security.Cryptography.HomogenizingCryptoServiceWrapper.Unprotect(byte[] protectedData)    Unknown
    System.Web.dll!System.Web.Security.MachineKey.Unprotect(System.Web.Security.Cryptography.ICryptoServiceProvider cryptoServiceProvider, byte[] protectedData, string[] purposes) Unknown
    System.Web.dll!System.Web.Security.MachineKey.Unprotect(byte[] protectedData, string[] purposes)    Unknown
>   LEDES.dll!LEDES.Models.ADALTokenCache.ADALTokenCache(string signedInUserId) Line 28 C#
    LEDES.dll!LEDES.Startup.ConfigureAuth.AnonymousMethod__7_0(Microsoft.Owin.Security.Notifications.AuthorizationCodeReceivedNotification context) Line 54 C#
    Microsoft.Owin.Security.OpenIdConnect.dll!Microsoft.Owin.Security.OpenIdConnect.OpenIdConnectAuthenticationHandler.AuthenticateCoreAsync()  Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)  Unknown
    mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()    Unknown
    mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.InvokeAction(object state)    Unknown
    mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunCallback(System.Threading.ContextCallback callback, object state, ref System.Threading.Tasks.Task currentTask) Unknown
    mscorlib.dll!System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation.Run(System.Threading.Tasks.Task task, bool canInlineContinuationTask)   Unknown
    mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()  Unknown
    mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree() Unknown
    mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)    Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.Owin.IFormCollection>.SetResult(Microsoft.Owin.IFormCollection result)    Unknown
    Microsoft.Owin.dll!Microsoft.Owin.OwinRequest.ReadFormAsync()   Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)  Unknown
    mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()    Unknown
    mscorlib.dll!System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation..cctor.AnonymousMethod__8_0(object state)   Unknown
    System.Web.dll!System.Web.AspNetSynchronizationContext.Post.AnonymousMethod__0()    Unknown
    System.Web.dll!System.Web.Util.SynchronizationHelper.SafeWrapCallback(System.Action action) Unknown
    System.Web.dll!System.Web.Util.SynchronizationHelper.QueueAsynchronous.AnonymousMethod__0(System.Threading.Tasks.Task _)    Unknown
    mscorlib.dll!System.Threading.Tasks.ContinuationTaskFromTask.InnerInvoke()  Unknown
    mscorlib.dll!System.Threading.Tasks.Task.Execute()  Unknown
    mscorlib.dll!System.Threading.Tasks.Task.ExecutionContextCallback(object obj)   Unknown
    mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot)    Unknown
    mscorlib.dll!System.Threading.Tasks.Task.ExecuteEntry(bool bPreventDoubleExecution) Unknown
    mscorlib.dll!System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() Unknown
    mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch()    Unknown
    mscorlib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() Unknown
    [Native to Managed Transition]  

6 个答案:

答案 0 :(得分:18)

陷入同样的​​问题。在“使用它”之后超过一个小时,我进入了成员数据库(通常由Visual Studio自动创建)并从UserTokenCaches表中删除了所有行。跑过应用程序,得到了加密的错误信息。创建了一个新的缓存令牌记录并将其插入到表中。

答案 1 :(得分:5)

  

添加了堆栈跟踪

你没有。了解为什么会出现这样一个无用的异常消息非常重要。这是故意。 System.Web隐藏了加密代码失败的真正原因。你得到一个平淡的错误信息(&#34;它不起作用&#34;)并且没有失败的实际代码的堆栈跟踪。

重要的是因为不这样做是危险的,它允许攻击者利用故意格式错误的数据来探测您的网络应用,并从异常中获取知识,以找到破解您的安全代码的方法。

您需要获得更好的堆栈跟踪和异常消息才能找到真正的原因。这要求您告诉调试器在抛出异常时停止。真实的,不是平淡的。在VS2015中,使用Debug&gt; Windows&gt;例外设置。单击&#34;公共语言运行时例外&#34;复选框,使其从矩形变为复选标记。另外:工具&gt;选项&gt;调试&gt;一般&gt;解开&#34;启用我的代码&#34;复选框。

答案 2 :(得分:4)

找到了解决方案。

错误来自的代码部分是AdalToken.Cache.cs文件。

userId = signedInUserId;
this.AfterAccess = AfterAccessNotification;
this.BeforeAccess = BeforeAccessNotification;
this.BeforeWrite = BeforeWriteNotification;
// look up the entry in the database
Cache = db.UserTokenCacheList.FirstOrDefault(c => c.webUserUniqueId == userId);
// place the entry in memory
this.Deserialize((Cache == null) ? null : MachineKey.Unprotect(Cache.cacheBits,"ADALCache"));

特别是最后一行。

db.UserTokenCacheList的上下文也是相关的,它是:

{
    public class ApplicationDbContext : DbContext
    {
        public ApplicationDbContext()
            : base("DefaultConnection")
        {
        }

        public DbSet<UserTokenCache> UserTokenCacheList { get; set; }
    }

    public class UserTokenCache
    {
        [Key]
        public int UserTokenCacheId { get; set; }
        public string webUserUniqueId { get; set; }
        public byte[] cacheBits { get; set; }
        public DateTime LastWrite { get; set; }
    }
}

当我启动这个新项目时,当我通过向导设置Azure身份验证时,所有这些都是由visual studio生成的。

关于ApplicationDbContext中的 base(&#34; DefaultConnection&#34;)

在我的web.config中没有这个条目,但是直到最近这一直都有效。

在web.config中,在&lt; connectionStrings&gt;我为DefaultConnection添加了一行指向我的数据库,现在它一切正常,至少目前是这样。

希望这可能对任何遇到同样错误的人有所帮助。

答案 3 :(得分:1)

请检查您的计算机配置文件是否具有计算机密钥配置。如果没有,请在您的web.config中添加机器密钥配置。

<system.web>    
    <machineKey
      validationKey="your validationKey"
      decryptionKey="your decryptionKey"      
    />
</system.web>

这为我解决了这个问题

答案 4 :(得分:0)

这些答案都不对我有用。就我而言,清除浏览器的历史记录可以解决此问题。也许只需删除cookie就足够了。

答案 5 :(得分:0)

MachineKey.Unprotect方法的文档解释了CryptographicException的原因,该文档也可以在VS的Intellisense中找到:

“可能的原因如下:该应用程序已部署到多台服务器上,并且正在使用自动生成的加密密钥。” (添加了重点)

当您有一个现有的会话cookie,该会话cookie的会话ID与上一个会话的ID相同时,就会发生此错误,但是服务器对加密操作使用了不同的密钥。 ADALTokenCache正在使用对称加密来加密/解密会话,这需要双向的同一密钥

UserTokenCaches表中检索会话数据,如下所示:

  1. 获取用户ID(例如,从声明中获取)
  2. 检索cacheBits,其中webUserUniqueID =用户ID
  3. 使用cacheBits作为解密密钥来解密MachineKey

自从首次加密该值以来,更改MachineKey时,解密将失败并引发CryptographicException。您可以通过复制以下两个对称加密示例来创建类似的情况:Encrypting DataDecrypting Data,但是更改其中一个密钥。

由于某种原因,当您更新Visual Studio时,它会重新生成您的MachineKey。由于您的Web浏览器仍然具有相同的会话cookie,因此ASP.NET从数据库中检索了您之前的会话,但无法对其进行解密。所有其他答案均通过阻止AdalTokenCache能够检索上一个会话来解决本地调试问题,但并没有真正解决根本原因(并且肯定不适用于生产系统!)

  • 清除cookie是可行的,因为ASP.NET必须创建一个新会话,而不是检索以前的会话。这将很难与生产系统的用户进行交流。
  • 出于相同的原因,从UserTokenCaches数据库表中删除所有行-它无法检索上一个会话,而不得不创建一个新会话。这将结束应用程序所有生产实例中的所有用户会话,并且您将无法获得维护窗口,因为某些用户会遇到异常。

一个更好的解决方案是确保生产部署都使用相同的加密密钥(例如,在web.config中设置MachineKey),或通过以不同的方式保护对会话数据的访问。有些人通过将加密密钥与加密数据存储在同一数据库中来解决此问题,但我真的不知道这样做的意义...