Exemplo n.º 1
0
func parseKey(maybe string) (Key, error) {
	h, err := mh.FromB58String(maybe)
	if err != nil {
		return nil, err
	}
	return &mhKey{mh: h}, nil
}
Exemplo n.º 2
0
// ResolvePath fetches the node for given path. It uses the first
// path component as a hash (key) of the first node, then resolves
// all other components walking the links, with ResolveLinks.
func (s *Resolver) ResolvePath(fpath string) (*merkledag.Node, error) {
	log.Debugf("Resolve: '%s'", fpath)
	fpath = path.Clean(fpath)

	parts := strings.Split(fpath, "/")

	// skip over empty first elem
	if len(parts[0]) == 0 {
		parts = parts[1:]
	}

	// if nothing, bail.
	if len(parts) == 0 {
		return nil, fmt.Errorf("ipfs path must contain at least one component")
	}

	// first element in the path is a b58 hash (for now)
	h, err := mh.FromB58String(parts[0])
	if err != nil {
		log.Debug("given path element is not a base58 string.\n")
		return nil, err
	}

	log.Debug("Resolve dag get.\n")
	nd, err := s.DAG.Get(u.Key(h))
	if err != nil {
		return nil, err
	}

	return s.ResolveLinks(nd, parts[1:])
}
Exemplo n.º 3
0
// Resolve implements Resolver. Uses the IPFS routing system to resolve SFS-like
// names.
func (r *routingResolver) Resolve(name string) (string, error) {
	log.Debugf("RoutingResolve: '%s'", name)
	ctx := context.TODO()
	hash, err := mh.FromB58String(name)
	if err != nil {
		log.Warning("RoutingResolve: bad input hash: [%s]\n", name)
		return "", err
	}
	// name should be a multihash. if it isn't, error out here.

	// use the routing system to get the name.
	// /ipns/<name>
	h := []byte("/ipns/" + string(hash))

	ipnsKey := u.Key(h)
	val, err := r.routing.GetValue(ctx, ipnsKey)
	if err != nil {
		log.Warning("RoutingResolve get failed.")
		return "", err
	}

	entry := new(pb.IpnsEntry)
	err = proto.Unmarshal(val, entry)
	if err != nil {
		return "", err
	}

	// name should be a public key retrievable from ipfs
	// /ipfs/<name>
	key := u.Key("/pk/" + string(hash))
	pkval, err := r.routing.GetValue(ctx, key)
	if err != nil {
		log.Warning("RoutingResolve PubKey Get failed.")
		return "", err
	}

	// get PublicKey from node.Data
	pk, err := ci.UnmarshalPublicKey(pkval)
	if err != nil {
		return "", err
	}
	hsh, _ := pk.Hash()
	log.Debugf("pk hash = %s", u.Key(hsh))

	// check sig with pk
	if ok, err := pk.Verify(ipnsEntryDataForSig(entry), entry.GetSignature()); err != nil || !ok {
		return "", fmt.Errorf("Invalid value. Not signed by PrivateKey corresponding to %v", pk)
	}

	// ok sig checks out. this is a valid name.
	return string(entry.GetValue()), nil
}
Exemplo n.º 4
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// 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
}
Exemplo n.º 5
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// converts the Node object into a real dag.Node
func deserializeNode(node *Node) (*dag.Node, error) {
	dagnode := new(dag.Node)
	dagnode.Data = node.Data
	dagnode.Links = make([]*dag.Link, len(node.Links))
	for i, link := range node.Links {
		hash, err := mh.FromB58String(link.Hash)
		if err != nil {
			return nil, err
		}
		dagnode.Links[i] = &dag.Link{
			Name: link.Name,
			Size: link.Size,
			Hash: hash,
		}
	}

	return dagnode, nil
}
Exemplo n.º 6
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func bootstrapInputToPeers(input []string) ([]*config.BootstrapPeer, error) {
	split := func(addr string) (string, string) {
		idx := strings.LastIndex(addr, "/")
		if idx == -1 {
			return "", addr
		}
		return addr[:idx], addr[idx+1:]
	}

	peers := []*config.BootstrapPeer{}
	for _, addr := range input {
		addrS, peeridS := split(addr)

		// make sure addrS parses as a multiaddr.
		if len(addrS) > 0 {
			maddr, err := ma.NewMultiaddr(addrS)
			if err != nil {
				return nil, err
			}

			addrS = maddr.String()
		}

		// make sure idS parses as a peer.ID
		_, err := mh.FromB58String(peeridS)
		if err != nil {
			return nil, err
		}

		// construct config entry
		peers = append(peers, &config.BootstrapPeer{
			Address: addrS,
			PeerID:  peeridS,
		})
	}
	return peers, nil
}
Exemplo n.º 7
0
	Arguments: []cmds.Argument{
		cmds.StringArg("key", true, false, "The base58 multihash of an existing block to get"),
	},
	Run: func(req cmds.Request) (interface{}, error) {
		n, err := req.Context().GetNode()
		if err != nil {
			return nil, err
		}

		key := req.Arguments()[0]

		if !u.IsValidHash(key) {
			return nil, cmds.Error{"Not a valid hash", cmds.ErrClient}
		}

		h, err := mh.FromB58String(key)
		if err != nil {
			return nil, err
		}

		k := u.Key(h)
		ctx, _ := context.WithTimeout(context.TODO(), time.Second*5)
		b, err := n.Blocks.GetBlock(ctx, k)
		if err != nil {
			return nil, err
		}
		log.Debugf("BlockGet key: '%q'", b.Key())

		return bytes.NewReader(b.Data), nil
	},
}
Exemplo n.º 8
0
// CanResolve implements Resolver. Checks whether name is a b58 encoded string.
func (r *routingResolver) CanResolve(name string) bool {
	_, err := mh.FromB58String(name)
	return err == nil
}