From cd018a0cca3d0fe989c72a9c18ae90a4c80f1912 Mon Sep 17 00:00:00 2001
From: Kroese <kroese@users.noreply.github.com>
Date: Thu, 27 Mar 2025 01:08:17 +0100
Subject: [PATCH] feat: Validate BIOS serial (#230)

---
 Dockerfile    |  1 -
 src/boot.sh   | 13 +++++++++++++
 src/config.sh |  3 +++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 76d376c..938badc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,6 @@ RUN set -eu && \
         xz-utils \
         net-tools \
         e2fsprogs \
-        dmidecode \
         qemu-utils \
         iputils-ping \
         genisoimage \
diff --git a/src/boot.sh b/src/boot.sh
index b154013..1fb847b 100644
--- a/src/boot.sh
+++ b/src/boot.sh
@@ -99,4 +99,17 @@ else
   esac
 fi
 
+SM_BIOS=""
+
+if [ -s "/sys/class/dmi/id/product_serial" ]; then
+
+  BIOS_SERIAL=$(</sys/class/dmi/id/product_serial)
+  BIOS_SERIAL="${BIOS_SERIAL//[![:alnum:]]/}"
+
+  if [ -n "$BIOS_SERIAL" ]; then
+    SM_BIOS="-smbios type=1,serial=$BIOS_SERIAL"
+  fi
+
+fi
+
 return 0
diff --git a/src/config.sh b/src/config.sh
index 553b3d7..846bf9e 100644
--- a/src/config.sh
+++ b/src/config.sh
@@ -14,7 +14,10 @@ RAM_OPTS=$(echo "-m ${RAM_SIZE^^}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
 MON_OPTS="-monitor $MONITOR -name $PROCESS,process=$PROCESS,debug-threads=on"
 [ -n "$USB" ] && [[ "${USB,,}" != "no"* ]] && USB_OPTS="-device $USB -device usb-kbd -device usb-tablet"
 MAC_OPTS="-machine type=${MACHINE},secure=${SECURE},dump-guest-core=off${KVM_OPTS}"
+
 [ -n "$UUID" ] && MAC_OPTS+=" -uuid $UUID"
+[ -n "$SM_BIOS" ] && MAC_OPTS+=" $SM_BIOS"
+
 DEV_OPTS="-object rng-random,id=objrng0,filename=/dev/urandom"
 DEV_OPTS+=" -device virtio-rng-pci,rng=objrng0,id=rng0,bus=pcie.0"