mirror of
https://github.com/ipfs/kubo.git
synced 2025-09-09 19:32:24 +08:00
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package namesys
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import (
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"fmt"
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"time"
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context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/go.net/context"
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proto "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/goprotobuf/proto"
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mh "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multihash"
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ci "github.com/jbenet/go-ipfs/crypto"
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pb "github.com/jbenet/go-ipfs/namesys/internal/pb"
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routing "github.com/jbenet/go-ipfs/routing"
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u "github.com/jbenet/go-ipfs/util"
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)
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// ipnsPublisher is capable of publishing and resolving names to the IPFS
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// routing system.
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type ipnsPublisher struct {
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routing routing.IpfsRouting
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}
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// NewRoutingPublisher constructs a publisher for the IPFS Routing name system.
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func NewRoutingPublisher(route routing.IpfsRouting) Publisher {
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return &ipnsPublisher{routing: route}
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}
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// Publish implements Publisher. Accepts a keypair and a value,
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// and publishes it out to the routing system
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func (p *ipnsPublisher) Publish(k ci.PrivKey, value string) error {
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log.Debugf("namesys: Publish %s", value)
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// validate `value` is a ref (multihash)
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_, err := mh.FromB58String(value)
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if err != nil {
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return fmt.Errorf("publish value must be str multihash. %v", err)
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}
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ctx := context.TODO()
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data, err := createRoutingEntryData(k, value)
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if err != nil {
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return err
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}
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pubkey := k.GetPublic()
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pkbytes, err := pubkey.Bytes()
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if err != nil {
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return nil
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}
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nameb := u.Hash(pkbytes)
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namekey := u.Key(nameb).Pretty()
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ipnskey := []byte("/ipns/" + namekey)
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// Store associated public key
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timectx, _ := context.WithDeadline(ctx, time.Now().Add(time.Second*4))
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err = p.routing.PutValue(timectx, u.Key("/pk/"+string(nameb)), pkbytes)
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if err != nil {
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return err
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}
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// Store ipns entry at "/ipns/"+b58(h(pubkey))
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timectx, _ = context.WithDeadline(ctx, time.Now().Add(time.Second*4))
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err = p.routing.PutValue(timectx, u.Key(ipnskey), data)
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if err != nil {
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return err
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}
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return nil
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}
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func createRoutingEntryData(pk ci.PrivKey, val string) ([]byte, error) {
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entry := new(pb.IpnsEntry)
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sig, err := pk.Sign([]byte(val))
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if err != nil {
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return nil, err
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}
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entry.Signature = sig
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entry.Value = []byte(val)
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return proto.Marshal(entry)
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}
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