コード例 #1
0
ファイル: persist_test.go プロジェクト: qhsong/persist
func TestCache(t *testing.T) {
	c, err := New("test.db")
	if err != nil {
		t.Fatal(err)
	}

	for _, test := range []string{
		"/A/B",
		"/A",
		"/A",
		"/A/B/C",
		"/B",
	} {
		d := &ndn.Data{
			Name: ndn.NewName(test),
		}
		c.Add(d)
	}
	for _, test := range []struct {
		in   string
		want string
	}{
		{"/A", "/A/B/C"},
		{"/A/B", "/A/B/C"},
		{"/C", ""},
	} {
		d := c.Get(&ndn.Interest{
			Name: ndn.NewName(test.in),
			Selectors: ndn.Selectors{
				ChildSelector: 1,
			},
		})
		var got string
		if d != nil {
			got = d.Name.String()
		}
		if got != test.want {
			t.Fatalf("Get(%v) == %v, got %v", test.in, test.want, got)
		}
	}
}
コード例 #2
0
ファイル: main.go プロジェクト: go-ndn/ndn-cert-gen
func main() {
	var (
		identity string
		keyType  string
		file     string
	)
	flag.StringVar(&identity, "identity", "/ndn/guest/alice", "identity")
	flag.StringVar(&keyType, "type", "rsa", "[ rsa | ecdsa | hmac ]")
	flag.StringVar(&file, "file", "default", "file name for private key and certificate")
	flag.Parse()

	var (
		name = ndn.NewName(fmt.Sprintf("%s/%d/KEY/%%00%%00", identity, time.Now().UnixNano()/1000000))
		key  ndn.Key
	)
	switch keyType {
	case "rsa":
		pri, err := rsa.GenerateKey(rand.Reader, 2048)
		if err != nil {
			log.Println(err)
			return
		}
		key = &ndn.RSAKey{
			Name:       name,
			PrivateKey: pri,
		}
	case "ecdsa":
		pri, err := ecdsa.GenerateKey(elliptic.P224(), rand.Reader)
		if err != nil {
			log.Println(err)
			return
		}
		key = &ndn.ECDSAKey{
			Name:       name,
			PrivateKey: pri,
		}
	case "hmac":
		// 256 / 8 = 32
		pri := make([]byte, 32)
		rand.Read(pri)
		key = &ndn.HMACKey{
			Name:       name,
			PrivateKey: pri,
		}
	default:
		log.Println("unsupported key type")
		return
	}
	// private key
	pem, err := os.Create(file + ".pri")
	if err != nil {
		log.Println(err)
		return
	}
	defer pem.Close()
	err = ndn.EncodePrivateKey(key, pem)
	if err != nil {
		log.Println(err)
		return
	}
	// certificate
	cert, err := os.Create(file + ".ndncert")
	if err != nil {
		log.Println(err)
		return
	}
	defer cert.Close()
	err = ndn.EncodeCertificate(key, cert)
	if err != nil {
		log.Println(err)
		return
	}
	log.Println(name, "exported")
}
コード例 #3
0
ファイル: main.go プロジェクト: farkhana/go-ndnfs
func main() {
	flag.Parse()

	var data []byte
	var retry int = 0

	// config
	configFile, err := os.Open(*configPath)
	if err != nil {
		log.Fatalln(err)
	}
	defer configFile.Close()

	err = json.NewDecoder(configFile).Decode(&config)
	if err != nil {
		log.Fatalln(err)
	}

	// connect to nfd
	conn, err := packet.Dial(config.NFD.Network, config.NFD.Address)
	if err != nil {
		log.Fatalln(err)
	}
	// start a new face but do not receive new interests
	face := ndn.NewFace(conn, nil)
	defer face.Close()

	// read producer key
	pem, err := os.Open(config.PrivateKeyPath)
	if err != nil {
		log.Fatalln(err)
	}
	defer pem.Close()
	key, _ := ndn.DecodePrivateKey(pem)

	// create a data fetcher
	f := mux.NewFetcher()
	// 0. a data packet comes
	// 1. verifiy checksum
	f.Use(mux.ChecksumVerifier)
	// 2. add the data to the in-memory cache
	f.Use(mux.Cacher)
	// 3. logging
	f.Use(mux.Logger)
	// see producer
	// 4. assemble segments if the content has multiple segments
	// 5. decrypt
	dec := mux.Decryptor(key.(*ndn.RSAKey))
	// 6. unzip

	fileSplit := strings.Split(*filePrefix, "/")
	fileName := fileSplit[len(fileSplit)-1]
	file, err := os.Create(fileName)
	if err != nil {
		log.Fatalln(err)
	}
	defer file.Close()

	fmt.Printf("\nFetching file %s from ndn:%s\n\n", fileName, *filePrefix)

	retry_limit := 10

	if config.RetryLimit != 0 {
		retry_limit = config.RetryLimit
	}

	for retry = 0; retry <= retry_limit; retry++ {
		data = f.Fetch(face, &ndn.Interest{Name: ndn.NewName(*filePrefix)}, mux.Assembler, dec, mux.Gunzipper)

		if data != nil {
			break
		} else {
			fmt.Println("Empty data!")
		}
	}

	if retry <= retry_limit {
		databytes, err := io.Copy(file, bytes.NewReader(data))
		if err != nil {
			log.Fatalln(err)
		}

		fmt.Printf("wrote %d bytes\n", databytes)
	} else {
		fmt.Printf("\nFailed to fetch %s file after %d times retry attempt.\n\n", fileName, retry)
		err := os.Remove(fileName)
		if err != nil {
			log.Fatalln(err)
		}
	}

}