.net client for AS2 EDI comunication

Question

I have to prepare client application (c#) to send EDI messages over AS2. To be honest our client have no control over comunication and can see only correctly sended EDI messages. I tried different solution and libraries to test it like http://www.edidev.com/example_edi_transmission.html, https://mattfrear.com/2010/07/13/send-as2-with-dotnet/ and other, but none of them does not works with customer AS2 provider. I thought that support of AS 2 provider will help me but for now it doesn't work. I found a test AS2 server which cover my needs to do the tests (setting are the same as AS2 provider) but sended requests didn't shown on request list. My production requirements::

• Encrypt - 3DES with XXXX.cer
• Sign - SHA1 with YYYY.cer
• Mdm mode - synchronous
• Signed MDN - YES

So far my message which doesn't throw error (but don't work too) looks like:

MIME-Version: 1.0
Date: Thu, 12 May 2016 09:40:14 -0060
Content-Type: application/pkcs7-mime; smime-type=enveloped-data; name=smime.p7m
Content-Disposition: attachment; filename=smime.p7m
Content-Transfer-Encoding: binary
Message-ID: [email protected]
AS2-Version: 1.0
AS2-To: xxxx
AS2-From: yyyyy
Disposition-Notification-To: <[email protected]>

xxxxxxxxxxxxxxxxxxxx signed and encrypted data xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Has anyone done this kind of comunication. Any advice, library (open source), mime params need to specify, documetation ? I lost about a week on this without any progress. I will be grateful for any help :)

Answer 1

I created a project based on Matt Frear's excellent blog post and tested it against OpenAS2 v3.9.1. I hope it helps someone!