add disk encryption check

client/system/disk_encryption.go

@@ -0,0 +1,22 @@
+package system
+
+// DiskEncryptionVolume represents encryption status of a single volume.
+type DiskEncryptionVolume struct {
+	Path      string
+	Encrypted bool
+}
+
+// DiskEncryptionInfo holds disk encryption detection results.
+type DiskEncryptionInfo struct {
+	Volumes []DiskEncryptionVolume
+}
+
+// IsEncrypted returns true if the volume at the given path is encrypted.
+func (d DiskEncryptionInfo) IsEncrypted(path string) bool {
+	for _, v := range d.Volumes {
+		if v.Path == path {
+			return v.Encrypted
+		}
+	}
+	return false
+}