| 37 | } |
| 38 | |
| 39 | func hmacSign(args ...string) error { |
| 40 | if len(args) != 3 { |
| 41 | fmt.Fprintln(os.Stderr, "Usage:") |
| 42 | fmt.Fprintln(os.Stderr, "") |
| 43 | fmt.Fprintln(os.Stderr, "dumbproxy -hmac-sign <HMAC key> <username> <validity duration>") |
| 44 | fmt.Fprintln(os.Stderr, "") |
| 45 | return errors.New("bad command line arguments") |
| 46 | } |
| 47 | |
| 48 | secret, err := hex.DecodeString(args[0]) |
| 49 | if err != nil { |
| 50 | return fmt.Errorf("unable to hex-decode HMAC secret: %w", err) |
| 51 | } |
| 52 | |
| 53 | validity, err := time.ParseDuration(args[2]) |
| 54 | if err != nil { |
| 55 | return fmt.Errorf("unable to parse validity duration: %w", err) |
| 56 | } |
| 57 | |
| 58 | expire := time.Now().Add(validity).Unix() |
| 59 | mac := auth.CalculateHMACSignature(secret, args[1], expire) |
| 60 | token := auth.HMACToken{ |
| 61 | Expire: expire, |
| 62 | } |
| 63 | copy(token.Signature[:], mac) |
| 64 | |
| 65 | var resBuf bytes.Buffer |
| 66 | enc := base64.NewEncoder(base64.RawURLEncoding, &resBuf) |
| 67 | if err := binary.Write(enc, binary.BigEndian, &token); err != nil { |
| 68 | return fmt.Errorf("token encoding failed: %w", err) |
| 69 | } |
| 70 | enc.Close() |
| 71 | |
| 72 | fmt.Println("Username:", args[1]) |
| 73 | fmt.Println("Password:", resBuf.String()) |
| 74 | return nil |
| 75 | } |
| 76 | |
| 77 | func list_ciphers() { |
| 78 | for _, cipher := range tls.CipherSuites() { |