"Signature has problems" with "ASN1 bad tag value met"

Mail
1

I sometimes receive emails with “erroneous” signatures: “Signature has problems”. If I click on Signature the Signature Details dialogue pops up:

The error message “ASN1 Ungültiger Zeichenwert” should translate to “ASN1 bad tag value met” (found it in a Microsoft KB article).

I guess this message was thrown because eM Client doesn’t verify the content type properly. 

Content-Type: multipart/signed; micalg=PGP-SHA512; protocol=“application/pgp-signature”; …

Since it doesn’t understand the protocol “application/pgp-signature” it shouldn’t even attempt to verify the signature.

Best

2

Hi, first of all PGP is not supported in eM Client as I mentioned to you under another topics.
But the issue might be connected to something else as well, can you send us a signed message exported to .eml file to [email protected]?

Thank you,
Paul.

3

I apologise, please let me rephrase: eM Client should only attempt to verify signatures it is able to understand. I suppose that would be any message agreeing to protocol application/x-pkcs7-signature. Any other signature protocol should be ignored.

I’ll send you an example right away.

4

Thank you for the received .eml file, I’ve submitted the issue to the developers, I’ll keep you posted once I have more information or a possible solution for this issue.

Thank you for your input on this,
Paul.