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4391ba4ff4
RandPeerID generates random "valid" peer IDs. it does not NEED to generate keys because it is as if we lost the key right away. fine to read some randomness and hash it. to generate proper keys and an ID, use: sk, pk, _ := testutil.RandKeyPair() id, _ := peer.IDFromPublicKey(pk) Also added RandPeerIDFatal helper
119 lines
2.9 KiB
Go
119 lines
2.9 KiB
Go
package testutil
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import (
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"bytes"
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crand "crypto/rand"
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"errors"
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"fmt"
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"io"
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"testing"
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ci "github.com/jbenet/go-ipfs/crypto"
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peer "github.com/jbenet/go-ipfs/peer"
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u "github.com/jbenet/go-ipfs/util"
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ma "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multiaddr"
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)
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func RandKeyPair(bits int) (ci.PrivKey, ci.PubKey, error) {
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return ci.GenerateKeyPair(ci.RSA, bits)
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}
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// RandPeerID generates random "valid" peer IDs. it does not NEED to generate
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// keys because it is as if we lost the key right away. fine to read randomness
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// and hash it. to generate proper keys and corresponding PeerID, use:
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// sk, pk, _ := testutil.RandKeyPair()
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// id, _ := peer.IDFromPublicKey(pk)
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func RandPeerID() (peer.ID, error) {
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buf := make([]byte, 16)
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if _, err := io.ReadFull(crand.Reader, buf); err != nil {
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return "", err
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}
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h := u.Hash(buf)
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return peer.ID(h), nil
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}
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func RandPeerIDFatal(t testing.TB) peer.ID {
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p, err := RandPeerID()
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if err != nil {
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t.Fatal(err)
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}
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return p
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}
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var nextPort = 0
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// RandLocalTCPAddress returns a random multiaddr. it suppresses errors
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// for nice composability-- do check the address isn't nil.
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func RandLocalTCPAddress() ma.Multiaddr {
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if nextPort == 0 {
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nextPort = 10000 + SeededRand.Intn(50000)
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}
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// chances are it will work out, but it **might** fail if the port is in use
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// most ports above 10000 aren't in use by long running processes, so yay.
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// (maybe there should be a range of "loopback" ports that are guaranteed
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// to be open for the process, but naturally can only talk to self.)
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nextPort++
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addr := fmt.Sprintf("/ip4/127.0.0.1/tcp/%d", nextPort)
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maddr, _ := ma.NewMultiaddr(addr)
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return maddr
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}
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// PeerNetParams is a struct to bundle together the four things
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// you need to run a connection with a peer: id, 2keys, and addr.
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type PeerNetParams struct {
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ID peer.ID
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PrivKey ci.PrivKey
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PubKey ci.PubKey
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Addr ma.Multiaddr
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}
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func (p *PeerNetParams) checkKeys() error {
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if !p.ID.MatchesPrivateKey(p.PrivKey) {
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return errors.New("p.ID does not match p.PrivKey")
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}
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if !p.ID.MatchesPublicKey(p.PubKey) {
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return errors.New("p.ID does not match p.PubKey")
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}
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var buf bytes.Buffer
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buf.Write([]byte("hello world. this is me, I swear."))
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b := buf.Bytes()
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sig, err := p.PrivKey.Sign(b)
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if err != nil {
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return fmt.Errorf("sig signing failed: %s", err)
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}
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sigok, err := p.PubKey.Verify(b, sig)
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if err != nil {
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return fmt.Errorf("sig verify failed: %s", err)
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}
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if !sigok {
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return fmt.Errorf("sig verify failed: sig invalid!")
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}
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return nil // ok. move along.
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}
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func RandPeerNetParams(t *testing.T) (p PeerNetParams) {
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var err error
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p.Addr = RandLocalTCPAddress()
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p.PrivKey, p.PubKey, err = ci.GenerateKeyPair(ci.RSA, 512)
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if err != nil {
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t.Fatal(err)
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}
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p.ID, err = peer.IDFromPublicKey(p.PubKey)
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if err != nil {
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t.Fatal(err)
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}
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if err := p.checkKeys(); err != nil {
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t.Fatal(err)
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}
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return p
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}
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