Exemple #1
0
// VerifyAndSetPrivKey sets private key, given its pubkey matches the peer.ID
func (p *peer) VerifyAndSetPrivKey(sk ic.PrivKey) error {

	// construct and assign pubkey. ensure it matches this peer
	if err := p.VerifyAndSetPubKey(sk.GetPublic()); err != nil {
		return err
	}

	p.Lock()
	defer p.Unlock()

	// if we didn't have the priavte key, assign it
	if p.privKey == nil {
		p.privKey = sk
		return nil
	}

	// if we already had the keys, check they're equal.
	if p.privKey.Equals(sk) {
		return nil // as expected. keep the old objects.
	}

	// keys not equal. invariant violated. this warrants a panic.
	// these keys should be _the same_ because peer.ID = H(pk)
	// this mismatch should never happen.
	log.Errorf("%s had PrivKey: %v -- got %v", p, p.privKey, sk)
	panic("invariant violated: unexpected key mismatch")
}
func createRoutingEntryData(pk ci.PrivKey, val string) ([]byte, error) {
	entry := new(pb.IpnsEntry)

	entry.Value = []byte(val)
	typ := pb.IpnsEntry_EOL
	entry.ValidityType = &typ
	entry.Validity = []byte(u.FormatRFC3339(time.Now().Add(time.Hour * 24)))

	sig, err := pk.Sign(ipnsEntryDataForSig(entry))
	if err != nil {
		return nil, err
	}
	entry.Signature = sig
	return proto.Marshal(entry)
}
// Publish implements Publisher. Accepts a keypair and a value,
// and publishes it out to the routing system
func (p *ipnsPublisher) Publish(k ci.PrivKey, value string) error {
	log.Debugf("namesys: Publish %s", value)

	// validate `value` is a ref (multihash)
	_, err := mh.FromB58String(value)
	if err != nil {
		log.Errorf("hash cast failed: %s", value)
		return fmt.Errorf("publish value must be str multihash. %v", err)
	}

	ctx := context.TODO()
	data, err := createRoutingEntryData(k, value)
	if err != nil {
		log.Error("entry creation failed.")
		return err
	}
	pubkey := k.GetPublic()
	pkbytes, err := pubkey.Bytes()
	if err != nil {
		log.Error("pubkey getbytes failed.")
		return err
	}

	nameb := u.Hash(pkbytes)
	namekey := u.Key("/pk/" + string(nameb))

	log.Debugf("Storing pubkey at: %s", namekey)
	// Store associated public key
	timectx, _ := context.WithDeadline(ctx, time.Now().Add(time.Second*4))
	err = p.routing.PutValue(timectx, namekey, pkbytes)
	if err != nil {
		return err
	}

	ipnskey := u.Key("/ipns/" + string(nameb))

	log.Debugf("Storing ipns entry at: %s", ipnskey)
	// Store ipns entry at "/ipns/"+b58(h(pubkey))
	timectx, _ = context.WithDeadline(ctx, time.Now().Add(time.Second*4))
	err = p.routing.PutValue(timectx, ipnskey, data)
	if err != nil {
		return err
	}

	return nil
}
func publish(n *core.IpfsNode, k crypto.PrivKey, ref string) (*IpnsEntry, error) {
	pub := nsys.NewRoutingPublisher(n.Routing)
	err := pub.Publish(k, ref)
	if err != nil {
		return nil, err
	}

	hash, err := k.GetPublic().Hash()
	if err != nil {
		return nil, err
	}

	return &IpnsEntry{
		Name:  u.Key(hash).String(),
		Value: ref,
	}, nil
}
Exemple #5
0
// WithKeyPair returns a Peer object with given keys.
func WithKeyPair(sk ic.PrivKey, pk ic.PubKey) (Peer, error) {
	if sk == nil && pk == nil {
		return nil, fmt.Errorf("PeerWithKeyPair nil keys")
	}

	pk2 := sk.GetPublic()
	if pk == nil {
		pk = pk2
	} else if !pk.Equals(pk2) {
		return nil, fmt.Errorf("key mismatch. pubkey is not privkey's pubkey")
	}

	pkid, err := IDFromPubKey(pk)
	if err != nil {
		return nil, fmt.Errorf("Failed to hash public key: %v", err)
	}

	return &peer{id: pkid, pubKey: pk, privKey: sk}, nil
}