feat(encryption): refactor encryption provider scripts, update KMS integration, and enhance key management

2025-05-12 22:43:42 +02:00
parent 05d1624bdd
commit 15b07ea85d
19 changed files with 497 additions and 39 deletions
@@ -0,0 +1,130 @@
+package main
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+type Credentials struct {
+	AccessKey string `json:"access_key"`
+	SecretKey string `json:"secret_key"`
+	KeyArn    string `json:"key_arn"`
+	Region    string `json:"region"`
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Printf("Usage: %s <keyserver> [socket]\n", os.Args[0])
+		fmt.Printf("Example: %s https://keyserver.example.com\n", os.Args[0])
+		fmt.Printf("Example: %s https://keyserver.example.com /var/run/kmsplugin/socket.sock\n", os.Args[0])
+		os.Exit(1)
+	}
+
+	keyserver := os.Args[1]
+	socket := "/var/run/kmsplugin/socket.sock"
+	if len(os.Args) > 2 {
+		socket = os.Args[2]
+	}
+
+	// Check if keyserver is reachable
+	resp, err := http.Head(keyserver)
+	if err != nil || resp.StatusCode >= 400 {
+		log.Println("Key server not reachable, exiting.")
+		os.Exit(1)
+	}
+
+	// Generate UUID
+	uuid := getCPUModel() + getEth0MAC() + getSystemUUID()
+	keyID := md5sum(uuid)
+
+	log.Println("Downloading key from key server")
+	keyURL := fmt.Sprintf("%s/%s-encryption-service-credentials.json", keyserver, keyID)
+	resp, err = http.Get(keyURL)
+	if err != nil || resp.StatusCode != 200 {
+		log.Println("Failed to download key from key server")
+		os.Exit(1)
+	}
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body) // Changed from ioutil.ReadAll
+	if err != nil {
+		log.Println("Failed to read key file")
+		os.Exit(1)
+	}
+
+	var creds Credentials
+	if err := json.Unmarshal(body, &creds); err != nil {
+		log.Println("Failed to extract credentials from key file")
+		os.Exit(1)
+	}
+
+	os.Setenv("AWS_ACCESS_KEY_ID", creds.AccessKey)
+	os.Setenv("AWS_SECRET_ACCESS_KEY", creds.SecretKey)
+
+	// Prepare socket dir
+	socketDir := filepath.Dir(socket)
+	os.MkdirAll(socketDir, 0700)
+	os.Chmod(socketDir, 0700)
+
+	if _, err := os.Stat("/usr/local/bin/aws-encryption-provider"); os.IsNotExist(err) {
+		log.Println("Encryption provider not found, exiting.")
+		os.Exit(1)
+	}
+
+	cmd := exec.Command("/usr/local/bin/aws-encryption-provider",
+		"--key="+creds.KeyArn,
+		"--region="+creds.Region,
+		"--listen="+socket,
+	)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		log.Println("Failed to start encryption provider")
+		os.Exit(1)
+	}
+	os.Exit(0)
+}
+
+func getCPUModel() string {
+	data, err := os.ReadFile("/proc/cpuinfo") // Changed from ioutil.ReadFile
+	if err != nil {
+		return ""
+	}
+	for _, line := range strings.Split(string(data), "\n") {
+		if strings.HasPrefix(line, "model name") {
+			return line
+		}
+	}
+	return ""
+}
+
+func getEth0MAC() string {
+	iface, err := net.InterfaceByName("eth0")
+	if err != nil {
+		return ""
+	}
+	return iface.HardwareAddr.String()
+}
+
+func getSystemUUID() string {
+	out, err := exec.Command("sudo", "dmidecode", "-s", "system-uuid").Output()
+	if err != nil {
+		return ""
+	}
+	return strings.TrimSpace(string(out))
+}
+
+func md5sum(s string) string {
+	h := md5.New()
+	io.WriteString(h, s)
+	return hex.EncodeToString(h.Sum(nil))
+}