Azure 函数无法加载文件或程序集“System.Security.Cryptography.Pkcs”

Posted 2023-03-27

【中文标题】Azure 函数无法加载文件或程序集“System.Security.Cryptography.Pkcs”

【英文标题】：Azure Function Could not load file or assembly 'System.Security.Cryptography.Pkcs'

【发布时间】：2021-12-06 08:55:08

【问题描述】：

我最近尝试在 C# .NET Core 3.1 Web 应用程序中解密和验证 PKCS#7 消息。 Here is how I did it.

我在 Web 应用项目中使用了 System.Security.Cryptography.Pkcs。但是在实现相同的包并尝试在 Azure 函数中解密和验证后，它返回异常

"Could not load file or assembly 'System.Security.Cryptography.Pkcs, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.":"System.Security.Cryptography.Pkcs, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".

我尝试了几个堆栈溢出答案，但无法对其进行排序。

System.Security.Cryptography.X509Certificates 在 Azure 函数中运行良好，但 Pkcs 似乎有问题。

无论如何我可以解决它？

这是我的 .csproj：

<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
<AzureFunctionsVersion>v3</AzureFunctionsVersion>
<UserSecretsId>695a883e-9b1a-4d55-98a9-0b47b683bbb2</UserSecretsId>
<Nullable>annotations</Nullable>
</PropertyGroup>
<ItemGroup>
    <PackageReference Include="Autofac" Version="6.1.0" />
    <PackageReference Include="Dapper" Version="2.0.78" />
    <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.15.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0" />
    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.DurableTask" Version="2.4.2" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.0.11" />
    <PackageReference Include="System.Collections" Version="4.3.0" />
    <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />
    <PackageReference Include="System.Security.Cryptography.Pkcs" Version="6.0.0" />
</ItemGroup>
<ItemGroup>
<None Update="host.json">
  <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Update="local.settings.json">
  <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
  <CopyToPublishDirectory>Never</CopyToPublishDirectory>
</None>
</ItemGroup>
</Project>

【问题讨论】：

能否分享您的 .csproj 文件包参考资料

我现在用 .csproj 文件更新了问题。

你在类文件中导入System.Security.Cryptography.Pkcs命名空间了吗？

我能够解决问题following the answer mentioned here.

【参考方案1】：

Mishra](https://***.com/users/13378259/rocky-mishra) 很高兴您的问题得到解决，并将您的建议作为答案发布，以帮助面临类似问题的其他社区成员。

下面的示例代码有助于解决问题。

public class FunctionsAssemblyResolver

    public static void RedirectAssembly()
    
        var list = AppDomain.CurrentDomain.GetAssemblies().OrderByDescending(a => a.FullName).Select(a => a.FullName).ToList();
        AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
    

    private static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
    
        var requestedAssembly = new AssemblyName(args.Name);
        Assembly assembly = null;
        AppDomain.CurrentDomain.AssemblyResolve -= CurrentDomain_AssemblyResolve;
        try
        
            assembly = Assembly.Load(requestedAssembly.Name);
        
        catch (Exception ex)
        
        
        AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
        return assembly;
    

更多信息请查看SO。