通过Exchange Web Services编写加密邮件 [英] Writing an encrypted mail via Exchange Web Services

问题描述

我想使用C＃发送带有Exchange WEb服务的加密电子邮件消息。
有什么可能吗？
感谢

编辑：

我的邮件正文加密：

I would like to send an encrypted EMail Message with Exchange WEb Services using C#. Is there any possibillity? Thanks

My Mail body encrypter:

        public static byte[] encry(string body, ContentTyp typ, string to )
    {
        X509Certificate2 cert = GetMailCertificate(to);
        StringBuilder msg = new StringBuilder();
        msg.AppendLine(string.Format("Content-Type: text/{0}; charset=\"iso-8859-1\"", typ.ToString()));
        msg.AppendLine("Content-Transfer-Encoding: 7bit");
        msg.AppendLine();
        msg.AppendLine(body);
        EnvelopedCms envelope = new EnvelopedCms(new ContentInfo(Encoding.UTF8.GetBytes(msg.ToString())));
        CmsRecipient recipient = new CmsRecipient(SubjectIdentifierType.IssuerAndSerialNumber, cert);
        envelope.Encrypt(recipient);
        //System.IO.MemoryStream ms = new System.IO.MemoryStream(envelope.Encode());
        return envelope.Encode();
    }

主要

 byte [] con = encrypted.encry("test", encrypted.ContentTyp.plain, "[e-mail]");
        EmailMessage msg1 = new EmailMessage(_server);
        msg1.MimeContent = new MimeContent("UTF-8", con);
        msg1.ToRecipients.Add("[e-mail]");

        msg1.InternetMessageHeaders = ??
        msg1.Send();

推荐答案

如果您是指S / Mime加密，您必须根据 RFC 3852 和 RFC 4134 。完成之后，您可以发送消息。

If you are referring to S/Mime encryption, then you'll have to create the encrypted message according to RFC 3852 and RFC 4134. After you've done that, you can send the message.

使用EWS Managed API，可按如下方式完成：

Using the EWS Managed API, this can be done as follows:

var item = new EmailMessage(service);
item.MimeContent = new MimeContent(Encoding.ASCII.HeaderName, content);
// Set recipient infos, etc.
item.Send();

编辑：
您应该添加标题头，如From，To，Date，Subject，等等和内容类型。

You should add the standard headers like From, To, Date, Subject, etc. And the content-type.

Subject: Test
From: "sender" <[e-mail]>
To: "recipient" <[e-mail]>
Content-Type: application/pkcs7-mime; smime-type=signed-data; name=smime.p7m
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=smime.p7m

Your encrypted body goes here

只需使用StringWriter把所有的一切放在一起结果是您的MIME正文。

Just use a StringWriter put all that together. The result is your MIME body.

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