this is a major refactor of the entire codebase
it changes the monolithic peer.Peer into using
a peer.ID and a peer.Peerstore.
Other changes:
- removed handshake3.
- testutil vastly simplified peer
- secio bugfix + debugging logs
- testutil: RandKeyPair
- backpressure bugfix: w.o.w.
- peer: added hex enc/dec
- peer: added a PeerInfo struct
PeerInfo is a small struct used to pass around a peer with
a set of addresses and keys. This is not meant to be a
complete view of the system, but rather to model updates to
the peerstore. It is used by things like the routing system.
- updated peer/queue + peerset
- latency metrics
- testutil: use crand for PeerID gen
RandPeerID generates random "valid" peer IDs. it does not
NEED to generate keys because it is as if we lost the key
right away. fine to read some randomness and hash it. to
generate proper keys and an ID, use:
sk, pk, _ := testutil.RandKeyPair()
id, _ := peer.IDFromPublicKey(pk)
Also added RandPeerIDFatal helper
- removed old spipe
- updated seccat
- core: cleanup initIdentity
- removed old getFromPeerList
Now, all peers should be retrieved from the Peerstore, which will
construct the peers accordingly. This ensures there's only one peer
object per peer (opposite would be bad: things get out sync)
cc @whyrusleeping
the u.Hash error can be safely ignored (panic) because multihash
only fails from the selection of hash function. If the fn + length
are valid, it won't error.
cc @whyrusleeping
This commit fixed the notoriously annoying "Malformed Public Key"
problem. The issue was that sometimes the byte representation of
the points (x,y in big.Int) generated would be one less byte than
expected. This is simply because (* big.Int) Write uses the least
amount of bytes needed for the int.
I instead changed the marshalling/unmarshalling to do exactly
what stdlib crypto/tls does: use `ellipctic.Marshal` which marshals
according to the ANSI X9.62 standard.
http://golang.org/pkg/crypto/elliptic/#Marshalhttp://golang.org/src/pkg/crypto/tls/key_agreement.go#L214
```Go
// crypto/tls
ka.privateKey, x, y, err = elliptic.GenerateKey(ka.curve, config.rand())
ecdhePublic := elliptic.Marshal(ka.curve, x, y)
// ipfs/crypto
priv, x, y, err := elliptic.GenerateKey(curve, rand.Reader)
pubKey := elliptic.Marshal(curve, x, y)
```
((Warning: we're using `rand.Reader` directly, which we shouldn't
do, as it can be seeded. We should use a configured source, as
crypto/tls. Flagged in #143))
This makes me think we should re-use a lot of their datastructures
and functions directly (e.g. ecdheKeyAgreement)
Fixed: #135
cc @bren2010 @whyrusleeping
