On Thu, Feb 12, 2009 at 12:46 PM, Dr. Stephen Henson <st...@openssl.org> wrote:
> On Thu, Feb 12, 2009, Jan C. wrote:
>
>> Hi,
>> ok, so the clear text signature general form is something like:
>>
>>
>> ------A3DB62BE42E8E4D7716813FA55957190
>>
>> My Signed Text
>>
>> ------A3DB62BE42E8E4D7716813FA55957190
>> Content-Type: application/x-pkcs7-signature; name="smime.p7s"
>> Content-Transfer-Encoding: base64
>> Content-Disposition: attachment; filename="smime.p7s"
>>
>> MIIFlgYJKoZIhvcNAQcCoIIFhzCCBYMCAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3
>> .......
>>
>> ------A3DB62BE42E8E4D7716813FA55957190--
>>
>>
>>
>> And the opaque is the same thing but entirely encoded en B64 and
>> attached to the email as attachment ? Is that correct ?
>>
>
> Cleartext would have MIME headers in the first part.
>
> Opaque includes the content in the signature structure so you only get one
> part.

Ok

>
> If you want to see what they look like generate a few with the smime utility.

That's what I did but I wanted to understand the generated format ;)

Thanks,
Jan

>
> Steve.
> --
> Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
> OpenSSL project core developer and freelance consultant.
> Homepage: http://www.drh-consultancy.demon.co.uk
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