RE: More on Atom XML signatures and encryption

2005-06-22 Thread Bob Wyman
James M Snell wrote: I am becoming increasingly convinced that a c14n algorithm is the *only* way to accomplish the goal here. The need for C14N should never have been questioned. Where there are signatures, there *must* be C14N (Canonicalization). In the absence of explicitly defined

Re: More on Atom XML signatures and encryption

2005-06-22 Thread James M Snell
Bob Wyman wrote: James M Snell wrote: I am becoming increasingly convinced that a c14n algorithm is the *only* way to accomplish the goal here. The need for C14N should never have been questioned. Where there are signatures, there *must* be C14N (Canonicalization). In the

Re: Signature wording

2005-06-22 Thread Paul Hoffman
At 10:32 AM -0700 6/22/05, James M Snell wrote: Paul Hoffman wrote: 2) What you are signing is just the set of bits in the entry, or just the set of bits in the feed, with no interpretation of them. No pre-canonicalization is needed, and none is to be expected by the validating party. I

Re: Signature wording

2005-06-22 Thread Paul Hoffman
At 11:49 AM -0600 6/22/05, Antone Roundy wrote: I take it, Paul, that you're suggesting that we punt on ensuring that entries can be aggregated without breaking signatures. Exactly right. If so, we might consider suggesting some guidelines for maximizing the probability of a signature

Re: Signature wording

2005-06-22 Thread James M Snell
Paul Hoffman wrote: At 10:32 AM -0700 6/22/05, James M Snell wrote: Paul Hoffman wrote: 2) What you are signing is just the set of bits in the entry, or just the set of bits in the feed, with no interpretation of them. No pre-canonicalization is needed, and none is to be expected by the

Re: Signature wording

2005-06-22 Thread James M Snell
Paul Hoffman wrote: At 11:49 AM -0600 6/22/05, Antone Roundy wrote: I take it, Paul, that you're suggesting that we punt on ensuring that entries can be aggregated without breaking signatures. Exactly right. In the core Atom spec, absolutely. If so, we might consider suggesting some

Re: Signature wording

2005-06-22 Thread Tim Bray
On Jun 22, 2005, at 11:55 AM, James M Snell wrote: Note that I am not trying to change Atom's model or the core spec, We do agree on Paul's suggested changed saying it's OK to sign entries though, I think. I am trying to define an Atom extension that is capable of meeting a specific

Re: Signature wording

2005-06-22 Thread Tim Bray
On Jun 22, 2005, at 12:03 PM, James M Snell wrote: I'm planning to write a separate Internet-Draft that discusses digital signing of Atom feeds and entries. Some parts of that document will includes mandates; other parts will include recommendations. We can describe for entry producers

Re: Signature wording

2005-06-22 Thread James M Snell
Tim Bray wrote: On Jun 22, 2005, at 12:03 PM, James M Snell wrote: I'm planning to write a separate Internet-Draft that discusses digital signing of Atom feeds and entries. Some parts of that document will includes mandates; other parts will include recommendations. We can describe