68 lines
2.0 KiB
Bash
68 lines
2.0 KiB
Bash
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#!/bin/bash
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# secureboot_tpm_setup.sh - Script to set up Secure Boot and TPM during ISO build
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set -e
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# Paths and filenames
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KEY_DIR="/etc/secureboot"
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GRUB_PATH="/boot/EFI/BOOT/BOOTX64.EFI"
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KERNEL_PATH="/boot/vmlinuz"
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SIGNED_KERNEL_PATH="/boot/vmlinuz-signed"
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SIGNED_GRUB_PATH="/boot/EFI/BOOT/BOOTX64.EFI.signed"
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CONF_PATH="/etc/xbps.d"
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# Create directory for storing Secure Boot keys
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mkdir -p "$KEY_DIR"
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chmod 700 "$KEY_DIR"
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# Generate Secure Boot Keys
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echo "Generating Secure Boot keys..."
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openssl req -new -x509 -newkey rsa:2048 -keyout "$KEY_DIR/db.key" -out "$KEY_DIR/db.crt" -nodes -days 3650 -subj "/CN=Void Linux Secure Boot/"
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openssl x509 -in "$KEY_DIR/db.crt" -outform DER -out "$KEY_DIR/db.der"
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# Install required tools
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echo "Installing required tools..."
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xbps-install -S -y efitools sbsigntool tpm-tools tpm2-tools
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# Sign the GRUB EFI binary
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echo "Signing GRUB..."
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sbsign --key "$KEY_DIR/db.key" --cert "$KEY_DIR/db.crt" --output "$SIGNED_GRUB_PATH" "$GRUB_PATH"
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mv "$SIGNED_GRUB_PATH" "$GRUB_PATH"
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# Sign the kernel
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echo "Signing kernel..."
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sbsign --key "$KEY_DIR/db.key" --cert "$KEY_DIR/db.crt" --output "$SIGNED_KERNEL_PATH" "$KERNEL_PATH"
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mv "$SIGNED_KERNEL_PATH" "$KERNEL_PATH"
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# Configure GRUB to load the signed kernel
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echo "Configuring GRUB for signed kernel..."
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cat << EOF > /etc/grub.d/40_custom
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menuentry "Void Linux" {
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insmod gzio
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insmod part_gpt
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insmod ext2
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set root='hd0,gpt1'
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linux /vmlinuz root=/dev/sdX ro
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initrd /initramfs.img
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}
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EOF
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# Regenerate GRUB configuration
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echo "Generating GRUB configuration..."
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grub-mkconfig -o /boot/grub/grub.cfg
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# Set up TPM (optional, for integrity checks)
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echo "Configuring TPM..."
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echo "GRUB_CMDLINE_LINUX='tpm_tis.force=1'" >> /etc/default/grub
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grub-mkconfig -o /boot/grub/grub.cfg
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# Disable linux-headers to avoid conflicts with Secure Boot
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echo "Disabling linux-headers package..."
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mkdir -p "$CONF_PATH"
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echo "ignorepkg=linux-headers" > "$CONF_PATH/00-ignore.conf"
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# Clean up key files (optional, to avoid storing keys in ISO)
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rm -rf "$KEY_DIR"
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echo "Secure Boot and TPM setup completed."
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