Add node model

[kpcyrd]

I've added a mock NodeStore_nodeForAddr method which returns a new Object which is a bit closer to the admin api.

I don't know how to actually call this method, though.

The address gets generated from the public key later.

Feel free to commit on this branch.

[benhylau]

What is linkCount?

[kpcyrd]

The number of peers, one of the values returned by nodeByAddr

[benhylau]

How can the Java layer do stuff like getAddressFromPublicKey(publicKey) or encryptWithPrivateKey(arbitraryMessage, nonce) through the native service?

Related: #18

[kpcyrd]

getAddressFromPublicKey is simply double_sha(publicKey), see https://github.com/kpcyrd/yrd/blob/master/cjdns.py#L180

I'm not sure if encryptWithPrivateKey(arbitraryMessage, nonce) is possible.

[benhylau]

Actually, I don't even need encryptWithPrivateKey(arbitraryMessage, nonce). I just need to sign stuff (i.e. the credentials bundle) with the private key during peering, so the other party knows the credentials came with the authenticated operator of the node. As long as the Java layer has access to the private and public keys, this all can be implemented by integrating NaCl.

[kpcyrd]

You can read the private key from the config, but I'm not sure if it should be used for anything except cjdns.

[benhylau]

@kpcyrd See Step 4 of this. Can't think of another way to verify other than signing with the cjdns private key.

[kpcyrd]

I was busy and couldn't comment on this, yet. Sorry for that, I'll try to contribute in the next view days.

[benhylau]

@kpcyrd I will work on this branch when I get to the Node part after the Credentials. Thanks!

[benhylau]

Rebased and created branch in this repo so it's easier to work with. Closing this PR, k?

See #34