Ejemplo n.º 1
0
func parseHostLine(line []byte) (string, gossh.PublicKey, error) {
	end := bytes.IndexByte(line, ' ')
	if end <= 0 {
		return "", nil, ErrUnfoundHostAddr
	}
	addr := string(line[:end])
	keyByte := line[end+1:]
	key, _, _, _, err := gossh.ParseAuthorizedKey(keyByte)
	if err != nil {
		return "", nil, err
	}
	return addr, key, nil
}
Ejemplo n.º 2
0
func parseAuthorizedKeys(in []byte) ([]gossh.PublicKey, error) {
	pubkeys := make([]gossh.PublicKey, 0)
	for len(in) > 0 {
		pubkey, _, _, rest, err := gossh.ParseAuthorizedKey(in)
		if err != nil {
			return nil, err
		}
		in = rest

		pubkeys = append(pubkeys, pubkey)
	}

	return pubkeys, nil
}
Ejemplo n.º 3
0
// TestHostKeyChecker tests to check existing key
func TestHostKeyChecker(t *testing.T) {
	keyFile := NewHostKeyFile(hostFile)
	checker := NewHostKeyChecker(keyFile, nil, ioutil.Discard)

	addr, key, _ := parseHostLine([]byte(hostLine))
	tcpAddr, _ := net.ResolveTCPAddr("tcp", addr)

	if err := checker.Check("localhost", tcpAddr, key); err != nil {
		t.Fatalf("checker should succeed for %v: %v", tcpAddr.String(), err)
	}

	wrongKey, _, _, _, _ := gossh.ParseAuthorizedKey([]byte(wrongAuthorizedKey))
	if err := checker.Check("localhost", tcpAddr, wrongKey); err != ErrUnmatchKey {
		t.Fatalf("checker should fail with %v", ErrUnmatchKey)
	}
}
Ejemplo n.º 4
0
// parseKnownHostsLine parses a line from a known hosts file.  It returns a
// string containing the hosts section of the line, a gossh.PublicKey parsed
// from the line, and any error encountered during the parsing.
func parseKnownHostsLine(line []byte) (string, gossh.PublicKey, error) {

	// Skip any leading whitespace.
	line = bytes.TrimLeft(line, "\t ")

	// Skip comments and empty lines.
	if bytes.HasPrefix(line, []byte("#")) || len(line) == 0 {
		return "", nil, nil
	}

	// Skip markers.
	if bytes.HasPrefix(line, []byte("@")) {
		return "", nil, errors.New("marker functionality not implemented")
	}

	// Find the end of the host name(s) portion.
	end := bytes.IndexAny(line, "\t ")
	if end <= 0 {
		return "", nil, errors.New("bad format (insufficient fields)")
	}
	hosts := string(line[:end])
	keyBytes := line[end+1:]

	// Check for hashed host names.
	if strings.HasPrefix(hosts, sshHashDelim) {
		return "", nil, errors.New("hashed hosts not implemented")
	}

	// Finally, actually try to extract the key.
	key, _, _, _, err := gossh.ParseAuthorizedKey(keyBytes)
	if err != nil {
		return "", nil, fmt.Errorf("error parsing key: %v", err)
	}

	return hosts, key, nil
}