58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
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package ipfscluster
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import (
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"bytes"
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"context"
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"encoding/hex"
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"strings"
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libp2p "github.com/libp2p/go-libp2p"
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host "github.com/libp2p/go-libp2p-host"
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ipnet "github.com/libp2p/go-libp2p-interface-pnet"
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pnet "github.com/libp2p/go-libp2p-pnet"
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ma "github.com/multiformats/go-multiaddr"
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)
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// NewClusterHost creates a libp2p Host with the options in the from the
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// provided cluster configuration.
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func NewClusterHost(ctx context.Context, cfg *Config) (host.Host, error) {
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var prot ipnet.Protector
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// Create protector if we have a secret.
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if cfg.Secret != nil && len(cfg.Secret) > 0 {
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protKey, err := SecretToProtectorKey(cfg.Secret)
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if err != nil {
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return nil, err
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}
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prot, err = pnet.NewProtector(strings.NewReader(protKey))
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if err != nil {
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return nil, err
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}
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}
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return libp2p.New(ctx,
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libp2p.Identity(cfg.PrivateKey),
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libp2p.ListenAddrs([]ma.Multiaddr{cfg.ListenAddr}...),
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libp2p.PrivateNetwork(prot),
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// FIXME: Enable when libp2p >= 5.0.16
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// https://github.com/libp2p/go-libp2p/pull/293
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//libp2p.NATPortMap(),
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)
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}
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// SecretToProtectorKey converts a private network secret
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// provided as a byte-slice into the format expected by go-libp2p-pnet
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func SecretToProtectorKey(secret []byte) (string, error) {
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var key bytes.Buffer
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key.WriteString("/key/swarm/psk/1.0.0/\n")
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key.WriteString("/base16/\n")
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key.WriteString(EncodeProtectorKey(secret))
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return key.String(), nil
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}
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// EncodeProtectorKey converts a byte slice to its hex string representation.
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func EncodeProtectorKey(secretBytes []byte) string {
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return hex.EncodeToString(secretBytes)
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}
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