Hi,

I'm trying to configure a LibreSwan  server  with a Mikrotik router client (GRE 
tunnel).

Got it working with PSK auth, would like to switch to RSA key based auth.

Have seen the wiki's, still have some questions.

LibreSwan uses NSS for key storage - which is fine but Mikrotik doesn't have 
NSS to generate the keys nor understands NSS format (RFC 3110? aka DNS format 
encoding?)

It does understand SSH format keys (and I can convert them to / from P12) and 
of course I can use openssl to generate.

I can think of these ways to set up my keys, but can't get any of them to work:

Option 1:

Generate both (server and client) keys on server side with NSS and somehow 
export them in SSH format, including 1) server's public key 2) client's public 
key 3) client's private key

>From what I've seen on the Internet, NSS cannot (by design) export private 
>keys at all. Maybe this is wrong and there is a way?

And if I could do this, how would I convert from RFC 3110 in NSS to openssl 
format for Mikrotik?

Option 2:

Generate both (server and client) keys separately with openssl and somehow 
import them into NSS on the server, including 1) server's public key 2) 
server's private key 3) client's public key.

But as far as I can tell, NSS cannot import keys, only certificates (I mean 
pk12util -i ...) so that seems like a dead end too unless I'm missing something.

 Option 3:

Generate keys with openssl and somehow make LibreSwan use them directly from 
files, not from NSS.

Is this possible? I understand from LibreSwan docs that NSS is the main method 
of configuring keys - but is it perhaps also possible to use SSH format key 
files (or SSH format key strings in settings)?

Variation on 3:

Directly specify keys in LibreSwan config (as strings) but I'd to convert my 
openssl keys (both public and private for the server, public for the client) 
into RFC 3110 format, and can't find a way to do this.

I assume there is a solution to this, it has to be a frequent case where "the 
other side" is not also LibreSwan, but just can't find the right docs it seems.

Help please?

-- 
Kostya Vasilyev
[email protected]
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