Question

我想使用C＃向Exchange WEb服务发送加密的电子邮件消息。有可能吗？谢谢
编辑：
我的邮件正文加密器：

        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

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

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

Answer 1

如果您指的是S / Mime加密，则必须根据RFC 3852和RFC 4134创建加密邮件。完成后，您可以发送消息。

使用EWS托管API，可以按照以下方式完成：

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

编辑：您应该添加标准标题，如From，To，Date，Subject等。以及内容类型。

Subject: Test
From: "sender" <sender@yourcompany.com>
To: "recipient" <recipient@othercompany.com>
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将所有这些放在一起。结果就是你的MIME主体。

通过Exchange Web服务编写加密邮件

1 个答案: