On Mar 16, 2015, at 10:10 PM, Peter Gutmann
<pgut001(_at_)cs(_dot_)auckland(_dot_)ac(_dot_)nz> wrote:
David Shaw <dshaw(_at_)jabberwocky(_dot_)com> writes:
On Mar 16, 2015, at 5:15 PM, David Leon Gil <coruus(_at_)gmail(_dot_)com>
wrote:
Partial lengths are really a nuisance to parse.
No argument there...
The whole bizarro sort-of-fixed-point encoding of lengths is a pain (this is a
cue for Jon to do his "every bit is sacred" dance). If the format is revised,
there should be only two lengths, a 16-bit one for almost everything (keyring
data, signatures, etc), and a 32-bit one for payloads and partial lengths that
are going to exceed 16-bit lengths. Length-decoding shouldn't be any more
complicated than:
read tag;
if( tag & length_32_flag )
length = read32();
else
length = read16();
I'm fine with that, but I do want to keep the concept of partial lengths, as
you did above. People do encrypt things without knowing how large they are
ahead of time. I'm fine with a restriction (which already exists today) that
only payloads can use partial lengths.
David
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