623 lines
18 KiB
Bash
Executable File
623 lines
18 KiB
Bash
Executable File
#!/bin/bash
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# Forensic Practice Disk Image Creator
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# Creates disk images with various filesystems for forensic analysis practice
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set -e # Exit on error
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# Color codes for output
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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NC='\033[0m' # No Color
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# Function to print colored messages
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print_info() {
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echo -e "${BLUE}[INFO]${NC} $1"
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}
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print_success() {
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echo -e "${GREEN}[SUCCESS]${NC} $1"
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}
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print_warning() {
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echo -e "${YELLOW}[WARNING]${NC} $1"
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}
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print_error() {
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echo -e "${RED}[ERROR]${NC} $1"
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}
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# Check if running as root
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check_root() {
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if [ "$EUID" -ne 0 ]; then
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print_error "This script must be run as root (use sudo)"
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exit 1
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fi
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}
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# Function to check required tools
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check_dependencies() {
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local missing_tools=()
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command -v dd >/dev/null 2>&1 || missing_tools+=("coreutils")
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command -v losetup >/dev/null 2>&1 || missing_tools+=("util-linux")
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command -v parted >/dev/null 2>&1 || missing_tools+=("parted")
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command -v bc >/dev/null 2>&1 || missing_tools+=("bc")
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if [ ${#missing_tools[@]} -gt 0 ]; then
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print_error "Missing required packages: ${missing_tools[*]}"
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print_info "Install with: sudo apt-get install ${missing_tools[*]}"
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exit 1
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fi
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}
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# Check filesystem tool availability
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check_filesystem_tools() {
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echo ""
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echo "Checking filesystem tool availability..."
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echo ""
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# NTFS
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if command -v mkfs.ntfs >/dev/null 2>&1; then
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echo -e " ${GREEN}✓${NC} NTFS (mkfs.ntfs available)"
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else
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echo -e " ${YELLOW}✗${NC} NTFS (install: sudo apt-get install ntfs-3g)"
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fi
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# FAT32
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if command -v mkfs.vfat >/dev/null 2>&1; then
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echo -e " ${GREEN}✓${NC} FAT32 (mkfs.vfat available)"
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else
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echo -e " ${YELLOW}✗${NC} FAT32 (install: sudo apt-get install dosfstools)"
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fi
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# exFAT
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if command -v mkfs.exfat >/dev/null 2>&1; then
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echo -e " ${GREEN}✓${NC} exFAT (mkfs.exfat available)"
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else
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echo -e " ${YELLOW}✗${NC} exFAT (install: sudo apt-get install exfat-fuse exfat-utils)"
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fi
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# ext2/3/4
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if command -v mkfs.ext4 >/dev/null 2>&1; then
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echo -e " ${GREEN}✓${NC} ext2/3/4 (mkfs.ext4 available)"
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else
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echo -e " ${YELLOW}✗${NC} ext2/3/4 (install: sudo apt-get install e2fsprogs)"
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fi
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# XFS
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if command -v mkfs.xfs >/dev/null 2>&1; then
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echo -e " ${GREEN}✓${NC} XFS (mkfs.xfs available)"
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else
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echo -e " ${YELLOW}✗${NC} XFS (install: sudo apt-get install xfsprogs)"
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fi
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# swap
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if command -v mkswap >/dev/null 2>&1; then
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echo -e " ${GREEN}✓${NC} swap (mkswap available)"
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else
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echo -e " ${YELLOW}✗${NC} swap (should be in util-linux)"
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fi
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echo ""
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}
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# Display banner
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show_banner() {
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echo ""
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echo "=========================================="
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echo " Forensic Disk Image Creator"
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echo "=========================================="
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echo ""
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}
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# Get filename from user
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get_filename() {
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echo ""
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read -p "Enter output filename (default: forensic_disk.dd): " FILENAME
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FILENAME=${FILENAME:-forensic_disk.dd}
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if [ -f "$FILENAME" ]; then
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read -p "File already exists. Overwrite? (y/n): " OVERWRITE
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if [ "$OVERWRITE" != "y" ]; then
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print_info "Exiting..."
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exit 0
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fi
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fi
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}
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# Get disk size from user
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get_disk_size() {
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echo ""
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echo "Disk Size Options:"
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echo " 1) 100 MB (small, quick testing)"
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echo " 2) 500 MB (medium)"
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echo " 3) 1 GB (standard)"
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echo " 4) 5 GB (large)"
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echo " 5) Custom size"
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echo ""
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read -p "Select disk size [1-5]: " SIZE_CHOICE
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case $SIZE_CHOICE in
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1) DISK_SIZE_MB=100 ;;
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2) DISK_SIZE_MB=500 ;;
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3) DISK_SIZE_MB=1024 ;;
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4) DISK_SIZE_MB=5120 ;;
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5)
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read -p "Enter size in MB: " DISK_SIZE_MB
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if ! [[ "$DISK_SIZE_MB" =~ ^[0-9]+$ ]] || [ "$DISK_SIZE_MB" -lt 10 ]; then
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print_error "Invalid size. Must be at least 10 MB"
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exit 1
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fi
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;;
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*)
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print_error "Invalid choice"
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exit 1
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;;
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esac
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print_info "Selected disk size: ${DISK_SIZE_MB} MB"
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}
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# Get initialization method
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get_init_method() {
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echo ""
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echo "Initialization Method:"
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echo " 1) /dev/zero (Fast, zeros - forensically predictable)"
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echo " 2) /dev/random (Slow, random data - more realistic)"
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echo " 3) fallocate (Fastest, sparse file)"
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echo ""
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read -p "Select initialization method [1-3]: " INIT_CHOICE
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case $INIT_CHOICE in
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1) INIT_METHOD="zero" ;;
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2) INIT_METHOD="random" ;;
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3) INIT_METHOD="fallocate" ;;
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*)
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print_error "Invalid choice"
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exit 1
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;;
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esac
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print_info "Selected initialization method: $INIT_METHOD"
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}
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# Get partition scheme
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get_partition_scheme() {
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echo ""
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echo "Partition Scheme:"
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echo " 1) GPT (GUID Partition Table) - Modern, Windows 10/11 default"
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echo " 2) MBR (Master Boot Record) - Legacy, compatible with older systems"
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echo ""
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read -p "Select partition scheme [1-2]: " PARTITION_CHOICE
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case $PARTITION_CHOICE in
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1) PARTITION_SCHEME="gpt" ;;
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2) PARTITION_SCHEME="msdos" ;;
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*)
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print_error "Invalid choice"
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exit 1
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;;
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esac
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print_info "Selected partition scheme: $PARTITION_SCHEME"
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}
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# Get number of partitions
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get_partition_count() {
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echo ""
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read -p "How many partitions? (1-4): " PARTITION_COUNT
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if ! [[ "$PARTITION_COUNT" =~ ^[1-4]$ ]]; then
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print_error "Invalid number. Must be between 1 and 4"
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exit 1
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fi
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print_info "Creating $PARTITION_COUNT partition(s)"
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}
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# Get partition configurations
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get_partition_configs() {
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PARTITION_CONFIGS=()
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for i in $(seq 1 $PARTITION_COUNT); do
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echo ""
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echo "=========================================="
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echo " Partition $i Configuration"
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echo "=========================================="
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# Get filesystem
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echo ""
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echo "Filesystem Type:"
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echo " 1) NTFS (Windows default)"
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echo " 2) FAT32 (Universal compatibility)"
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echo " 3) exFAT (Modern, large file support)"
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echo " 4) ext4 (Linux default)"
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echo " 5) ext3 (Older Linux)"
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echo " 6) ext2 (Legacy Linux, no journaling)"
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echo " 7) XFS (High-performance Linux)"
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echo " 8) swap (Linux swap space)"
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echo ""
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read -p "Select filesystem for partition $i [1-8]: " FS_CHOICE
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case $FS_CHOICE in
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1)
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PART_FS="ntfs"
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if ! command -v mkfs.ntfs >/dev/null 2>&1; then
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print_error "mkfs.ntfs not found. Install: sudo apt-get install ntfs-3g"
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exit 1
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fi
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;;
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2)
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PART_FS="vfat"
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if ! command -v mkfs.vfat >/dev/null 2>&1; then
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print_error "mkfs.vfat not found. Install: sudo apt-get install dosfstools"
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exit 1
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fi
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;;
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3)
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PART_FS="exfat"
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if ! command -v mkfs.exfat >/dev/null 2>&1; then
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print_error "mkfs.exfat not found. Install: sudo apt-get install exfat-fuse exfat-utils"
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exit 1
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fi
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;;
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4)
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PART_FS="ext4"
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if ! command -v mkfs.ext4 >/dev/null 2>&1; then
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print_error "mkfs.ext4 not found. Install: sudo apt-get install e2fsprogs"
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exit 1
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fi
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;;
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5)
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PART_FS="ext3"
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if ! command -v mkfs.ext3 >/dev/null 2>&1; then
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print_error "mkfs.ext3 not found. Install: sudo apt-get install e2fsprogs"
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exit 1
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fi
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;;
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6)
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PART_FS="ext2"
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if ! command -v mkfs.ext2 >/dev/null 2>&1; then
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print_error "mkfs.ext2 not found. Install: sudo apt-get install e2fsprogs"
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exit 1
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fi
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;;
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7)
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PART_FS="xfs"
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if ! command -v mkfs.xfs >/dev/null 2>&1; then
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print_error "mkfs.xfs not found. Install: sudo apt-get install xfsprogs"
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exit 1
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fi
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;;
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8)
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PART_FS="swap"
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if ! command -v mkswap >/dev/null 2>&1; then
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print_error "mkswap not found. Install: sudo apt-get install util-linux"
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exit 1
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fi
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;;
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*)
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print_error "Invalid choice"
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exit 1
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;;
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esac
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# Get size
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if [ $i -lt $PARTITION_COUNT ]; then
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read -p "Size for partition $i in MB: " PART_SIZE
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if ! [[ "$PART_SIZE" =~ ^[0-9]+$ ]] || [ "$PART_SIZE" -lt 1 ]; then
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print_error "Invalid size"
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exit 1
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fi
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else
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PART_SIZE="remaining"
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print_info "Partition $i will use remaining space"
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fi
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# Get label (skip for swap)
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if [ "$PART_FS" != "swap" ]; then
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read -p "Volume label for partition $i (default: PART$i): " PART_LABEL
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PART_LABEL=${PART_LABEL:-PART$i}
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else
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PART_LABEL=""
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fi
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PARTITION_CONFIGS+=("$PART_FS|$PART_SIZE|$PART_LABEL")
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print_info "Partition $i: $PART_FS, ${PART_SIZE}MB, label='$PART_LABEL'"
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done
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}
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# Create the disk image
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create_disk_image() {
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print_info "Creating disk image file: $FILENAME (${DISK_SIZE_MB} MB) using $INIT_METHOD..."
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case $INIT_METHOD in
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fallocate)
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if command -v fallocate >/dev/null 2>&1; then
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fallocate -l ${DISK_SIZE_MB}M "$FILENAME"
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else
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print_warning "fallocate not available, falling back to /dev/zero"
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dd if=/dev/zero of="$FILENAME" bs=1M count=$DISK_SIZE_MB status=progress
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fi
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;;
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zero)
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dd if=/dev/zero of="$FILENAME" bs=1M count=$DISK_SIZE_MB status=progress
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;;
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random)
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print_warning "Using /dev/urandom - this will be SLOW!"
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dd if=/dev/urandom of="$FILENAME" bs=1M count=$DISK_SIZE_MB status=progress
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;;
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esac
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print_success "Disk image created with $INIT_METHOD"
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}
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# Setup loop device
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setup_loop_device() {
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print_info "Setting up loop device..."
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LOOP_DEVICE=$(losetup -f)
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losetup "$LOOP_DEVICE" "$FILENAME"
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print_success "Loop device created: $LOOP_DEVICE"
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}
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# Create partition table and partitions
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create_partitions() {
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print_info "Creating $PARTITION_SCHEME partition table..."
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parted -s "$LOOP_DEVICE" mklabel "$PARTITION_SCHEME"
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local start_mb=1
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local part_num=1
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for config in "${PARTITION_CONFIGS[@]}"; do
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IFS='|' read -r fs size label <<< "$config"
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if [ "$size" = "remaining" ]; then
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end="100%"
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else
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end="${start_mb}MiB + ${size}MiB"
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end=$(echo "$start_mb + $size" | bc)
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end="${end}MiB"
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fi
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print_info "Creating partition $part_num: ${start_mb}MiB -> $end"
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if [ "$fs" = "swap" ]; then
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parted -s "$LOOP_DEVICE" mkpart primary linux-swap "${start_mb}MiB" "$end"
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else
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parted -s "$LOOP_DEVICE" mkpart primary "${start_mb}MiB" "$end"
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fi
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if [ "$size" != "remaining" ]; then
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start_mb=$(echo "$start_mb + $size" | bc)
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fi
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part_num=$((part_num + 1))
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done
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# Inform kernel about partition table changes
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partprobe "$LOOP_DEVICE"
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sleep 2
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print_success "Partitions created"
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}
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# Format the partitions
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format_partitions() {
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local part_num=1
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for config in "${PARTITION_CONFIGS[@]}"; do
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IFS='|' read -r fs size label <<< "$config"
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# Determine partition device name
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PARTITION="${LOOP_DEVICE}p${part_num}"
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if [ ! -e "$PARTITION" ]; then
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PARTITION="${LOOP_DEVICE}${part_num}"
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fi
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if [ ! -e "$PARTITION" ]; then
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print_error "Cannot find partition device for partition $part_num"
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cleanup
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exit 1
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fi
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print_info "Formatting partition $part_num ($PARTITION) with $fs filesystem..."
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case $fs in
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ntfs)
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mkfs.ntfs -f -L "$label" "$PARTITION"
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;;
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vfat)
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mkfs.vfat -n "$label" "$PARTITION"
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;;
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exfat)
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mkfs.exfat -n "$label" "$PARTITION"
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;;
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ext2|ext3|ext4)
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mkfs."$fs" -L "$label" "$PARTITION"
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;;
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xfs)
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mkfs.xfs -f -L "$label" "$PARTITION"
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;;
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swap)
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mkswap -L "SWAP$part_num" "$PARTITION"
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;;
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esac
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print_success "Partition $part_num formatted"
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part_num=$((part_num + 1))
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done
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}
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# Cleanup function
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cleanup() {
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if [ -n "$LOOP_DEVICE" ]; then
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print_info "Cleaning up loop device..."
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losetup -d "$LOOP_DEVICE" 2>/dev/null || true
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fi
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}
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# Mount filesystems
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mount_filesystems() {
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echo ""
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read -p "Do you want to mount the filesystem(s) now? (y/n): " MOUNT_NOW
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if [ "$MOUNT_NOW" = "y" ]; then
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local part_num=1
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MOUNT_POINTS=()
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for config in "${PARTITION_CONFIGS[@]}"; do
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IFS='|' read -r fs size label <<< "$config"
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# Skip swap partitions
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if [ "$fs" = "swap" ]; then
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print_info "Skipping mount for swap partition $part_num"
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part_num=$((part_num + 1))
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continue
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fi
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PARTITION="${LOOP_DEVICE}p${part_num}"
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if [ ! -e "$PARTITION" ]; then
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PARTITION="${LOOP_DEVICE}${part_num}"
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fi
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MOUNT_POINT="/mnt/forensic_p${part_num}_$$"
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mkdir -p "$MOUNT_POINT"
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print_info "Mounting partition $part_num to $MOUNT_POINT..."
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mount "$PARTITION" "$MOUNT_POINT"
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print_success "Partition $part_num mounted at: $MOUNT_POINT"
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MOUNT_POINTS+=("$MOUNT_POINT")
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part_num=$((part_num + 1))
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done
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fi
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}
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# Display summary
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show_summary() {
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echo ""
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echo "=========================================="
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echo " Disk Image Creation Complete!"
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echo "=========================================="
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echo ""
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echo "Image File: $(realpath $FILENAME)"
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echo "Size: ${DISK_SIZE_MB} MB"
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echo "Init Method: $INIT_METHOD"
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echo "Partition Scheme: $PARTITION_SCHEME"
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echo "Loop Device: $LOOP_DEVICE"
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echo ""
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echo "Partitions:"
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local part_num=1
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for config in "${PARTITION_CONFIGS[@]}"; do
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IFS='|' read -r fs size label <<< "$config"
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PARTITION="${LOOP_DEVICE}p${part_num}"
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if [ ! -e "$PARTITION" ]; then
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PARTITION="${LOOP_DEVICE}${part_num}"
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fi
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if [ "$fs" = "swap" ]; then
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echo " [$part_num] $PARTITION - $fs (${size}MB)"
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else
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echo " [$part_num] $PARTITION - $fs (${size}MB) - '$label'"
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fi
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part_num=$((part_num + 1))
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done
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if [ ${#MOUNT_POINTS[@]} -gt 0 ]; then
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echo ""
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echo "Mount Points:"
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for mp in "${MOUNT_POINTS[@]}"; do
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echo " $mp"
|
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done
|
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fi
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echo ""
|
|
echo "=========================================="
|
|
echo " Forensic Analysis Commands"
|
|
echo "=========================================="
|
|
echo ""
|
|
echo "View partition table:"
|
|
echo " sudo parted $FILENAME print"
|
|
echo " sudo fdisk -l $FILENAME"
|
|
echo ""
|
|
echo "Hex editor analysis:"
|
|
echo " hexdump -C $FILENAME | less"
|
|
echo " xxd $FILENAME | less"
|
|
echo ""
|
|
echo "Analyze with forensic tools:"
|
|
echo " mmls $FILENAME"
|
|
echo ""
|
|
echo "Clean up (when done):"
|
|
if [ ${#MOUNT_POINTS[@]} -gt 0 ]; then
|
|
for mp in "${MOUNT_POINTS[@]}"; do
|
|
echo " sudo umount $mp"
|
|
done
|
|
fi
|
|
echo " sudo losetup -d $LOOP_DEVICE"
|
|
echo ""
|
|
}
|
|
|
|
# Trap to ensure cleanup on exit
|
|
trap cleanup EXIT
|
|
|
|
# Main execution
|
|
main() {
|
|
show_banner
|
|
check_root
|
|
check_dependencies
|
|
check_filesystem_tools
|
|
|
|
get_filename
|
|
get_disk_size
|
|
get_init_method
|
|
get_partition_scheme
|
|
get_partition_count
|
|
get_partition_configs
|
|
|
|
echo ""
|
|
echo "=========================================="
|
|
echo " Summary"
|
|
echo "=========================================="
|
|
echo "Filename: $FILENAME"
|
|
echo "Size: ${DISK_SIZE_MB} MB"
|
|
echo "Init Method: $INIT_METHOD"
|
|
echo "Partition Scheme: $PARTITION_SCHEME"
|
|
echo "Partitions: $PARTITION_COUNT"
|
|
|
|
for i in $(seq 1 $PARTITION_COUNT); do
|
|
config="${PARTITION_CONFIGS[$((i-1))]}"
|
|
IFS='|' read -r fs size label <<< "$config"
|
|
if [ "$fs" = "swap" ]; then
|
|
echo " [$i] $fs (${size}MB)"
|
|
else
|
|
echo " [$i] $fs (${size}MB) - '$label'"
|
|
fi
|
|
done
|
|
|
|
echo ""
|
|
read -p "Proceed with creation? (y/n): " CONFIRM
|
|
|
|
if [ "$CONFIRM" != "y" ]; then
|
|
print_info "Cancelled"
|
|
exit 0
|
|
fi
|
|
|
|
create_disk_image
|
|
setup_loop_device
|
|
create_partitions
|
|
format_partitions
|
|
mount_filesystems
|
|
|
|
show_summary
|
|
}
|
|
|
|
# Run main function
|
|
main |