in reply to Need help in SSH
DSA is defined by a standard called FIPS 186. There have been four versions of this standard, each of which placed different requirements on the key length:
- FIPS 186: allowed keys to be any multiple of 64 bits between 512 and 1024
- FIPS 186-1: ???
- FIPS 186-2: requires keys to be always 1024 bits
- FIPS 186-3: allows keys to be 1024, 2048 or 3072 bits
Current versions of OpenSSH only allow you to use 1024 bit keys because 1024 is the only size that is allowed by all versions of the standard. Older versions (about 5 years ago or so) allowed other sizes.
You may be able to generate keys of other lengths using OpenSSL (I've not tried), but it's unlikely you'd be able to use them in SSH. You definitely can generate keys of different lengths using Crypt::DSA, but again it's unlikely you'd be able to use them for SSH purposes.
RSA keys allow you a greater variety of key sizes.
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'
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