[Nym3-devel] SIG size for control messages sent to the nymserver.

[Laurent Fousse]

Hi,

nym-specs say every control message sent to the nymserver carries a
RSA-OAEP signature of SHA1(remainder_of_message), section 4.3

It also says the SIG size is PK_LEN = 256, however in the NEWPK specs
(section 4.3.4) the size of the identity key used for this signature
may be 128 or 256 octets, leading to a signature size of 128 or 256
octets.

What do you suggest?

 (1) force the key size to 2048 bits,
 (2) zero-pad the 128 octets signature to get a 256 octets signature,
 (3) add one leading octet that gives the signature length.

I'm not really in favour of (3), and the key generation time might
bother users of slow machines for a forced 2048 bits keysize.
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