Fwd: KMail does not decrypt SMIME

Hi!

I'm forwarding your message to [email protected] where the GnuPG experts 
reside.

Regards,
Ingo

----------  Forwarded Message  ----------

Subject: KMail does not decrypt SMIME
Date: Tuesday 17 April 2007 21:39
From: M Hoeller <[email protected]>
To: [email protected]

Hello,

I have a problem to decrypt Mails which are encrypted with SMIME /
x.509.

I have: successfully set up OpenPGP to en- and decrypt and have
validated this with others.

Also I can sign and encrypt mails with my x.509 certificat from
CAcert.org. Others can decrypt the mails I have encrypted and signed.

BUT i can not decrypt mails which others have encrypted with x.509.
I always get the message: message decryption failed: unsupported
algorithm RC2. I have attatched the log from gpgsm.

I use gpgsm 1.9.22 which does not support RC2 due to patent issues,
and RC2 is outdated anyway. I have KMail 1.9.6 with kde 3.5.6 release
64.1 and a openSUSE 10.2.

Since one of the senders use Thunderbird 1.5.0.10 I come to the
impression that it is NOT that I receive RC2 (Thunderbird in this
version does not send RC2 but 3DES afaik).
On the other hand gpgsm throws the error only when the algorithm is
truely indentyvied:

Look at the error handling code:
              rc = gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
              log_error ("unsupported algorithm `%s'\n", algoid?
		algoid:"?");
              if (algoid && !strcmp (algoid, "1.2.840.113549.3.2"))
                log_info (_("(this is the RC2 algorithm)\n"));


How everI have also to look at my configuration and this is still a
miracle to me.

Is there some where step by step how to install / check
kmail/kleopatra and the gpgME setup? I have used guessing to set up
and this is never good. On the other hand I did not find a good
source of information.

It would be really great if someone could, please. Post a quick list
of what to check.

One of the questions is if I should use the dirmgr or gpg-agent? I
also commit that I have poor knowledge here and that I want to get
this improved, though I really did not find single place which
describes how the things link to gether.

Here is the data I am refering to:

User-Agent: Thunderbird 1.5.0.10 (X11/20070306)
MIME-Version: 1.0
X-Enigmail-Version: 0.94.0.0
OpenPGP: id=BDD13B90; url=http://tinyurl.com/5d8mm
Content-Type: application/x-pkcs7-mime; name="smime.p7m"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7m"
Content-Description: S/MIME Encrypted Message

gpgsm log:

4 - 2007-04-16 21:32:46 gpgsm[7623.0x8084a98] DBG: <- DECRYPT
4 - 2007-04-16 21:32:46 gpgsm[7623]: unsupported algorithm
`1.2.840.113549.3.2'
4 - 2007-04-16 21:32:46 gpgsm[7623]: (Dies ist der RC-2 Algorithmus)
4 - 2007-04-16 21:32:46 gpgsm[7623.0x8084a98] DBG: -> S ERROR
decrypt.algorithm 50331732 1.2.840.113549.3.2
4 - 2007-04-16 21:32:46 gpgsm[7623.0x8084a98] DBG: -> S
DECRYPTION_FAILED
4 - 2007-04-16 21:32:46 gpgsm[7623]: message decryption failed: Nicht
unterstütztes Verfahren
4 - 2007-04-16 21:32:46 gpgsm[7623.0x8084a98] DBG: -> ERR 50331732
Nicht unterstütztes Verfahren
4 - 2007-04-16 21:32:47 gpgsm[7623.0x8084a98] DBG: <- BYE

Thanks a lot and have a nice day
Michael
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