Reading encrypted+signed S/MIME messages

[Milan Zamazal]

When I send an S/MIME message encrypted and signed in Gnus with the `C-c
C-m c s' command, the same Gnus version (current CVS Emacs) can't read
it.  It first asks whether to decrypt the message and after the `y'
answer it reports: Could not identify PKCS#7 type.  openssl decrypts and
verifies the received message fine.

I can see the beginning of the message doesn't match the contents of
mm-pkcs7-signed-magic nor mm-pkcs7-enveloped-magic.  FWIW, here is the
beginning of the message, base64 encoded:

  MIIKQwYJKoZIhvcNAQcDoIIKNDCCCjACAQAxggEAMIH9AgEAMIGmMIGYMQswCQYD

How is it possible that Gnus can't read its own messages?

Thanks for any clue.

Milan Zamazal

-- 
http://www.zamazal.org