x86 code bytes from rough implementations for t_cose using QCBOR:
Laurence Ilari Ilari-kem-id-not-optional
Encode 141 120 115
Decode 123 194 169
Total 264 314 284
Not a very big difference. I’m fine with either.
If we take Ilari’s, I’d like the KEM ID to not be optional. It will only add
one or two bytes to what is transmitted and it will simplify decoding. It
probably removes some ambiguity and error conditions too.
LL
In Laurence’s, t_cose works on a linked list of parameters including HPKE
parameters that are encoded/decoded by the already-existing parameter
processor. For Ilari’s the CBOR decoder is called to encode/decode the array
in/out of a COSE parameter.
_______________________________________________
COSE mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/cose
