Problem interoperating with PGP Univeral?

[Patrick Brunschwig]

David Shaw wrote:
> On Sat, Mar 31, 2007 at 11:29:54PM +0200, Patrick Brunschwig wrote:
>> Blumenthal, Uri wrote:
>>> I am trying to get cleartext-signed PGP/MIME messages produced by PGP
>>> Universal 2.5.3, verified by email clients (Thunderbird-1.5.0.10 +
>>> Enigmail-0.94.2 + GPG-1.4.7).
>>>
>>> So far my experience is:
>>>
>>> - Pure plaintext (neither PGP/MIME nor PGP/Partitioned) messages are
>>> verified OK.
>>>
>>> - PGP/MIME encrypted and signed messages are decrypted and verified OK.
>>>
>>> - PGP/MIME or PGP/Partitioned messages (HTML body and/or attachments)
>>> fail signature verification, with error message from GPG:
>>>
>>>   Cleartext signature without data
>>>
>>> I've submitted help request to Enigmail list, but perhaps somebody here
>>> can advise me regarding this issue? Maybe there are settings at PGP
>>> Universal that should be changed to make its output "friendlier"? Or
>>> maybe there are GPG setting that would allow verification of those
>>> emails? 
>>>
>>> I'll be grateful for any help!
>>>
>>> Thank you!
>> I can provide some more details on this. GnuPG 1.4.7 returns with this
>> error message "gpg: can't handle this ambiguous signature data".
>>
>> This is the detached signature that comes with such a message:
>>
>> -----BEGIN PGP SIGNATURE-----
>> Version: PGP Universal 2.5.3
>>
>> qANQR1DEDQMBAhH9zteyosL+MwHCPwMFAUYL2iX9zteyosL+MxECC8QAnRhWP2Sx
>> Ex7VcRL+wBVB2C7lksYAAKCYHvRP7E8vA5jKNgigU0o4kbFn4w==
>> =lOCI
>> -----END PGP SIGNATURE-----
> 
> That's just a regular signature.  How does Enigmail call GPG to do the
> verification?
> 
> David


To be 100% clear: Uri has sent me the attached message msg-dump-bad.txt,
which I extracted to file.txt and file.txt.asc.

If I call gpg (1.4.7) with: "gpg --verify file.txt.asc file.txt"

I get: "gpg: can't handle this ambiguous signature data"

That's all the information I have. As far as I can tell, the message
itself looks perfectly fine.

-Patrick
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: msg-dump-bad.txt
Url: /pipermail/attachments/20070402/c7f0d507/attachment.txt 
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: file.txt
Url: /pipermail/attachments/20070402/c7f0d507/attachment-0001.txt 
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: file.txt.asc
Url: /pipermail/attachments/20070402/c7f0d507/attachment.asc