Hi Richard! On 12/24/25 21:17, Richard Clayton wrote:
In message <[email protected]>, Hannah Stern <[email protected]> writes
In body change recipes, section 5 of the draft, b: can insert base64 encoded content (i.e. that has been removed or changed at some point). It doesn't encode the final CRLF, but can encode intermediate CRLFs
on reflection this is more confusing than useful (and is a nuisance to check) so I have removed this from the #5 text I am working on
I agree and I like how you changed and worded it in the new draft version.
if it encodes multiple lines. Can it be specified (or considered as if specified) that a b: recipe is invalid if it encodes bare CR or bare LF or other characters that are not 7-bit valid characters within an Internet Message body?
I have made it clear that CR and LF are not permitted (so if you have accepted such a message and changed it then you will not be able to provide a recipe to show what you have done).
That's great and fits in with the general wording about the message needing to be in a canonical RFC 5322 format before applying the first signature.
In header change recipes, are b: tags supposed to encode pre-canonicalized header content? It's already specified that they may not encode any CRLF, but nothing is said about WSP sequences or any WSP at the beginning.
it is not necessary to deal with this ... because the only thing you ever do with a reconstructed header field is to push it through a canonicalisation step and feed it to a hash function.
Naively I'd assume that a verifier has to cope with non-canonicalized header content except folding. And can other non-valid encoded octets (non-7-bit or otherwise) be considered as invalid (i.e. failing verification)?
Since canonicalisationo of header fields unfolds them, there's no need to worry about reconstructing the original folding
That's true and I think clearly expressed in the new draft. Kind regards, Hannah. -- Hannah Stern Software Developer Mail Transfer Development 1&1 Mail & Media Development & Technology GmbH | | | Phone: +49 721 91374-4519 E-Mail: [email protected] | Web: www.mail-and-media.com www.gmx.net www.web.de www.mail.com www.united-internet-media.de Hauptsitz Montabaur, Amtsgericht Montabaur, HRB 5452 Geschäftsführer: Alexander Charles, Dr. Michael Hagenau, Thomas Ludwig, Dr. Verena Patzelt Member of United Internet Diese E-Mail kann vertrauliche und/oder gesetzlich geschützte Informationen enthalten. Wenn Sie nicht der bestimmungsgemäße Adressat sind oder diese E-Mail irrtümlich erhalten haben, unterrichten Sie bitte den Absender und vernichten Sie diese E-Mail. Anderen als dem bestimmungsgemäßen Adressaten ist untersagt, diese E-Mail zu speichern, weiterzuleiten oder ihren Inhalt auf welche Weise auch immer zu verwenden. This e-mail may contain confidential and/or privileged information. If you are not the intended recipient of this e-mail, you are hereby notified that saving, distribution or use of the content of this e-mail in any way is prohibited. If you have received this e-mail in error, please notify the sender and delete the e-mail. _______________________________________________ Ietf-dkim mailing list -- [email protected] To unsubscribe send an email to [email protected]
