When we send AS2 encrypted S/MIME data to a trading partner, we receive a 'bad' MDN back indicating a decryption error occurred.
MDN Error Messages:
The encrypted message sent to 112084681 has been received.
However, the message could not be decrypted/verified (may have been altered).
There is no guarantee about the validity of the actual transaction, or that it has been
read by a human operator.
Reporting-UA: BOECSAPP03 (Liaison ECS 7.1)
Disposition: automatic-action/MDN-sent-automatically; processed/Error: decryption-failed
EXTOL Secure Error Log:
Received HTTP response(200 OK)
Received synchronous MDN
Failed to verify MDN signature(java.security.SignatureException: Verification failed)
We needed to contact AS2 trading partner to obtain their new AS2 public certificate. With the new certificate, TP was able to decrypt our outbound data.
By: Sean Hoppe on