Hi. ssh-keygen(1)'s description of the "-b" options should also document the valid parameters for ECDSA keys (namely the curves). Cheers, Chris.
good point, the text now reads: > For ECDSA keys, the -b flag determines they key > length by selecting from one of three elliptic > curve sizes: 256, 384 or 521 bits. Attempting > to use bit lengths other than these three values > for ECDSA keys will fail.
close resolved bugs now that openssh-5.9 has been released