C＃创建MIME消息？

Question

在C＃.Net中有没有内置的MIME文件功能？我要做的是：

1. 将文件转换为MIME消息
2. 将MIME消息签名为pcks 7 blob
3. pkcs 7 blob的MIME
4. 最后加密整个事情。

关于我将如何处理此问题的任何建议（不是加密或签名部分，而是MIMEing）？ MIME文件中究竟包含哪些内容？

Answer 1

Answer 2

Answer 3

据我所知，在.NET中没有这样的支持。你必须尝试第三方库之一。其中一个是我们的Rebex Secure Mail for .NET。以下代码显示了如何实现它：

using Rebex.Mail;
using Rebex.Mime.Headers;
using Rebex.Security.Certificates;
...

// load the sender's certificate and 
// associated private key from a file 
Certificate signer = Certificate.LoadPfx("hugo.pfx", "password");

// load the recipient's certificate 
Certificate recipient = Certificate.LoadDer("joe.cer");

// create an instance of MailMessage 
MailMessage message = new MailMessage();

// set its properties to desired values 
message.From = "hugo@example.com";
message.To = "joe@example.com";
message.Subject = "This is a simple message";
message.BodyText = "Hello, Joe!";
message.BodyHtml = "Hello, <b>Joe</b>!";

// sign the message using Hugo's certificate 
message.Sign(signer);

// and encrypt it using Joe's certificate 
message.Encrypt(recipient);

// if you wanted Hugo to be able to read the message later as well, 
// you can encrypt it for Hugo as well instead - comment out the previous 
// encrypt and uncomment this one: 
// message.Encrypt(recipient, signer) 

（代码取自S/MIME tutorial page）