mirror of
https://github.com/ipfs/kubo.git
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bf22aeec0a
- Modified Godeps/Godeps.json by hand - [TEST] Updated welcome docs hash to sharness - [TEST] Updated contact doc - [TEST] disabled breaking test (t0080-repo refs local)
91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
package namesys
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import (
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"fmt"
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"github.com/ipfs/go-ipfs/Godeps/_workspace/src/code.google.com/p/goprotobuf/proto"
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mh "github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multihash"
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"github.com/ipfs/go-ipfs/Godeps/_workspace/src/golang.org/x/net/context"
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pb "github.com/ipfs/go-ipfs/namesys/internal/pb"
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ci "github.com/ipfs/go-ipfs/p2p/crypto"
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routing "github.com/ipfs/go-ipfs/routing"
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u "github.com/ipfs/go-ipfs/util"
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)
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var log = u.Logger("namesys")
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// routingResolver implements NSResolver for the main IPFS SFS-like naming
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type routingResolver struct {
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routing routing.IpfsRouting
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}
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// NewRoutingResolver constructs a name resolver using the IPFS Routing system
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// to implement SFS-like naming on top.
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func NewRoutingResolver(route routing.IpfsRouting) Resolver {
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if route == nil {
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panic("attempt to create resolver with nil routing system")
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}
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return &routingResolver{routing: route}
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}
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// CanResolve implements Resolver. Checks whether name is a b58 encoded string.
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func (r *routingResolver) CanResolve(name string) bool {
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_, err := mh.FromB58String(name)
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return err == nil
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}
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// Resolve implements Resolver. Uses the IPFS routing system to resolve SFS-like
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// names.
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func (r *routingResolver) Resolve(ctx context.Context, name string) (u.Key, error) {
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log.Debugf("RoutingResolve: '%s'", name)
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hash, err := mh.FromB58String(name)
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if err != nil {
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log.Warning("RoutingResolve: bad input hash: [%s]\n", name)
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return "", err
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}
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// name should be a multihash. if it isn't, error out here.
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// use the routing system to get the name.
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// /ipns/<name>
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h := []byte("/ipns/" + string(hash))
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ipnsKey := u.Key(h)
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val, err := r.routing.GetValue(ctx, ipnsKey)
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if err != nil {
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log.Warning("RoutingResolve get failed.")
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return "", err
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}
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entry := new(pb.IpnsEntry)
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err = proto.Unmarshal(val, entry)
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if err != nil {
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return "", err
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}
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// name should be a public key retrievable from ipfs
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// /ipfs/<name>
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key := u.Key("/pk/" + string(hash))
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pkval, err := r.routing.GetValue(ctx, key)
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if err != nil {
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log.Warning("RoutingResolve PubKey Get failed.")
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return "", err
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}
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// get PublicKey from node.Data
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pk, err := ci.UnmarshalPublicKey(pkval)
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if err != nil {
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return "", err
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}
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hsh, _ := pk.Hash()
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log.Debugf("pk hash = %s", u.Key(hsh))
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// check sig with pk
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if ok, err := pk.Verify(ipnsEntryDataForSig(entry), entry.GetSignature()); err != nil || !ok {
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return "", fmt.Errorf("Invalid value. Not signed by PrivateKey corresponding to %v", pk)
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}
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// ok sig checks out. this is a valid name.
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return u.Key(entry.GetValue()), nil
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}
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