75 lines
2.5 KiB
Bash
Executable File
75 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
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# Secure Boot configuration script for football system
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# This script ensures Secure Boot is properly configured
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set -euo pipefail
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echo "Configuring Secure Boot..."
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# Check if Secure Boot is supported
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if [ ! -d /sys/firmware/efi ]; then
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echo "WARNING: EFI not detected. Secure Boot requires EFI system."
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echo "This image may need to be deployed on a UEFI system with Secure Boot."
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fi
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# Install Secure Boot packages
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apt-get update
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apt-get install -y shim-signed grub-efi-amd64-signed
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# Ensure GRUB is signed
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echo "GRUB will use signed bootloader (shim-signed)"
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# Configure kernel for Secure Boot
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echo "Configuring kernel for Secure Boot..."
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cat > /etc/default/grub.d/secureboot.cfg << 'EOF'
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GRUB_DISABLE_OS_PROBER=true
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GRUB_DISABLE_SUBMENU=y
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EOF
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# Lock GRUB to prevent unauthorized modifications
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echo "Locking GRUB configuration..."
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cat > /etc/grub.d/40_custom << 'EOF'
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#!/bin/sh
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exec tail -n +3 $0
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# This file provides an easy way to add custom menu entries.
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# Lockdown: prevent editing GRUB entries
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set superusers="football"
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password_pbkdf2 football grub.pbkdf2.sha512.10000.$(echo -n "secure-boot-password" | grub-mkpasswd-pbkdf2 -s 2>/dev/null | tail -n +3 | sed 's/^.*grub\.pbkdf2\.sha512\.10000\.//')
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EOF
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chmod 755 /etc/grub.d/40_custom
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# Update GRUB
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update-grub 2>/dev/null || true
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# Configure kernel command line for lockdown
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echo "Configuring kernel lockdown mode..."
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if [ -f /etc/default/grub ]; then
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sed -i 's/^GRUB_CMDLINE_LINUX_DEFAULT=""/GRUB_CMDLINE_LINUX_DEFAULT="lockdown=confidentiality,integrity"/' /etc/default/grub
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sed -i 's/^GRUB_CMDLINE_LINUX=""/GRUB_CMDLINE_LINUX="lockdown=confidentiality,integrity"/' /etc/default/grub
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fi
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# Enable UEFI Secure Boot verification in kernel
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cat >> /etc/modprobe.d/secureboot.conf << 'EOF'
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options efivarfs mode=0444
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EOF
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# Ensure kernel modules are signed
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echo "Verifying kernel module signing..."
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for module in "/lib/modules/$(uname -r)"/*.ko; do
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if [ -f "$module" ]; then
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sig=$(modinfo "$module" 2>/dev/null | grep -ci "signature:")
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if [ "$sig" -eq 0 ]; then
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echo "WARNING: Module $module is not signed"
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fi
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fi
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done 2>/dev/null || true
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echo "Secure Boot configuration complete."
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echo ""
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echo "IMPORTANT: When deploying to physical hardware:"
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echo "1. Ensure UEFI Secure Boot is ENABLED in BIOS/UEFI settings"
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echo "2. Verify that the Microsoft UEFI CA is in the key database"
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echo "3. The system will only boot with signed kernel and bootloader"
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echo "4. Any unsigned kernel modules will be rejected"
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echo ""
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