feat: add oclaw pair command for mobile QR pairing

cmd/pair.go

@@ -0,0 +1,216 @@
+package cmd
+
+import (
+	"crypto/ed25519"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/json"
+	"encoding/pem"
+	"fmt"
+	"net"
+	"net/url"
+	"os"
+	"path/filepath"
+
+	qrcode "github.com/skip2/go-qrcode"
+	"github.com/spf13/cobra"
+
+	"github.com/quantum-bytes/oclaw/internal/config"
+)
+
+var pairHost string
+
+var pairCmd = &cobra.Command{
+	Use:   "pair",
+	Short: "Display a QR code for pairing the oclaw mobile app",
+	Long: `Generates a QR code containing the gateway connection details.
+Scan this code with the oclaw mobile app to connect instantly.
+
+The QR encodes an oclaw:// URI with the gateway's LAN IP, port, auth token,
+and device credentials for scope authorization.
+Use --host to override the auto-detected LAN IP if the wrong interface is selected.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		cfg, err := config.Load(flagURL, flagToken, flagAgent)
+		if err != nil {
+			return fmt.Errorf("load config: %w", err)
+		}
+
+		// Parse gateway URL to extract port
+		gwURL, err := url.Parse(cfg.GatewayURL)
+		if err != nil {
+			return fmt.Errorf("parse gateway URL %q: %w", cfg.GatewayURL, err)
+		}
+
+		port := gwURL.Port()
+		if port == "" {
+			port = "39421"
+		}
+
+		// Determine host: explicit flag > auto-detect
+		host := pairHost
+		if host == "" {
+			host, err = detectLANIP()
+			if err != nil {
+				return fmt.Errorf("detect LAN IP (use --host to specify manually): %w", err)
+			}
+		}
+
+		// Build query params
+		params := url.Values{"token": {cfg.Token}}
+
+		// Load device identity for scope authorization
+		deviceID, privKeyB64, err := loadDeviceKey()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "  Warning: no device identity found (%v)\n", err)
+			fmt.Fprintf(os.Stderr, "  Mobile app will connect without operator scopes\n\n")
+		} else {
+			params.Set("did", deviceID)
+			params.Set("dkey", privKeyB64)
+		}
+
+		// Build oclaw:// URI
+		pairURI := &url.URL{
+			Scheme:   "oclaw",
+			Host:     net.JoinHostPort(host, port),
+			RawQuery: params.Encode(),
+		}
+		uri := pairURI.String()
+
+		// Generate QR code as terminal string
+		qr, err := qrcode.New(uri, qrcode.Medium)
+		if err != nil {
+			return fmt.Errorf("generate QR code: %w", err)
+		}
+
+		// Mask token for display
+		maskedToken := cfg.Token
+		if len(maskedToken) > 4 {
+			maskedToken = maskedToken[:4] + "****"
+		}
+
+		fmt.Println()
+		fmt.Println("  Scan this QR code with the oclaw mobile app:")
+		fmt.Println()
+		fmt.Print(qr.ToSmallString(false))
+		fmt.Println()
+		fmt.Printf("  Host:   %s:%s\n", host, port)
+		fmt.Printf("  Token:  %s\n", maskedToken)
+		if deviceID != "" {
+			fmt.Printf("  Device: %s...%s\n", deviceID[:8], deviceID[len(deviceID)-8:])
+		}
+		fmt.Println()
+
+		return nil
+	},
+}
+
+func init() {
+	pairCmd.Flags().StringVar(&pairHost, "host", "", "Override auto-detected LAN IP (e.g., 192.168.1.100)")
+	rootCmd.AddCommand(pairCmd)
+}
+
+// deviceJSON is the structure of ~/.openclaw/identity/device.json.
+type deviceJSON struct {
+	DeviceID      string `json:"deviceId"`
+	PrivateKeyPem string `json:"privateKeyPem"`
+}
+
+// loadDeviceKey reads the device identity and returns the device ID and
+// base64-encoded raw Ed25519 private key seed (32 bytes).
+func loadDeviceKey() (deviceID, privKeyB64 string, err error) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return "", "", err
+	}
+
+	path := filepath.Join(home, ".openclaw", "identity", "device.json")
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return "", "", err
+	}
+
+	var dev deviceJSON
+	if err := json.Unmarshal(data, &dev); err != nil {
+		return "", "", fmt.Errorf("parse device.json: %w", err)
+	}
+
+	// Parse PEM-encoded private key
+	block, _ := pem.Decode([]byte(dev.PrivateKeyPem))
+	if block == nil {
+		return "", "", fmt.Errorf("no PEM block found in privateKeyPem")
+	}
+
+	key, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		return "", "", fmt.Errorf("parse PKCS8 key: %w", err)
+	}
+
+	edKey, ok := key.(ed25519.PrivateKey)
+	if !ok {
+		return "", "", fmt.Errorf("not an Ed25519 key")
+	}
+
+	// Ed25519 private key is 64 bytes; seed is first 32
+	seed := edKey.Seed()
+	return dev.DeviceID, base64.StdEncoding.EncodeToString(seed), nil
+}
+
+// detectLANIP returns the first non-loopback, non-virtual IPv4 address.
+// It prefers physical interfaces (en*, eth*) over virtual ones.
+func detectLANIP() (string, error) {
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return "", err
+	}
+
+	var fallback string
+
+	for _, iface := range ifaces {
+		if iface.Flags&net.FlagLoopback != 0 || iface.Flags&net.FlagUp == 0 {
+			continue
+		}
+
+		addrs, err := iface.Addrs()
+		if err != nil {
+			continue
+		}
+
+		for _, addr := range addrs {
+			var ip net.IP
+			switch v := addr.(type) {
+			case *net.IPNet:
+				ip = v.IP
+			case *net.IPAddr:
+				ip = v.IP
+			}
+
+			if ip == nil || ip.IsLoopback() {
+				continue
+			}
+
+			ip4 := ip.To4()
+			if ip4 == nil {
+				continue
+			}
+
+			if ip4[0] == 169 && ip4[1] == 254 {
+				continue
+			}
+
+			name := iface.Name
+			if (len(name) >= 2 && name[:2] == "en") || (len(name) >= 3 && name[:3] == "eth") {
+				return ip4.String(), nil
+			}
+
+			if fallback == "" {
+				fallback = ip4.String()
+			}
+		}
+	}
+
+	if fallback != "" {
+		return fallback, nil
+	}
+
+	return "", fmt.Errorf("no LAN IPv4 address found")
+}

cmd/root.go

@@ -47,9 +47,9 @@ bypassing the buggy built-in TUI.`,
 }
 
 func init() {
-	rootCmd.Flags().StringVar(&flagURL, "url", "", "Gateway WebSocket URL (default: from config or ws://127.0.0.1:39421)")
-	rootCmd.Flags().StringVar(&flagToken, "token", "", "Gateway auth token (default: from config)")
-	rootCmd.Flags().StringVar(&flagAgent, "agent", "", "Default agent ID to connect to")
+	rootCmd.PersistentFlags().StringVar(&flagURL, "url", "", "Gateway WebSocket URL (default: from config or ws://127.0.0.1:39421)")
+	rootCmd.PersistentFlags().StringVar(&flagToken, "token", "", "Gateway auth token (default: from config)")
+	rootCmd.PersistentFlags().StringVar(&flagAgent, "agent", "", "Default agent ID to connect to")
 }
 
 func Execute() {

go.mod

@@ -39,6 +39,7 @@ require (
 	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/muesli/termenv v0.16.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e // indirect
 	github.com/spf13/pflag v1.0.9 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	github.com/yuin/goldmark v1.7.13 // indirect

go.sum

@@ -79,6 +79,8 @@ github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJ
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e h1:MRM5ITcdelLK2j1vwZ3Je0FKVCfqOLp5zO6trqMLYs0=
+github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e/go.mod h1:XV66xRDqSt+GTGFMVlhk3ULuV0y9ZmzeVGR4mloJI3M=
 github.com/spf13/cobra v1.10.2 h1:DMTTonx5m65Ic0GOoRY2c16WCbHxOOw6xxezuLaBpcU=
 github.com/spf13/cobra v1.10.2/go.mod h1:7C1pvHqHw5A4vrJfjNwvOdzYu0Gml16OCs2GRiTUUS4=
 github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=