Termux Internal Audit Tool

#!/data/data/com.termux/files/usr/bin/bash

# Function to handle errors
handle_error() {
    echo -e "\e[91mError: $1\e[0m"
    exit 1
}

# Function to display the header
display_header() {
    echo -e "\e[1m\e[94m"
    echo "********************************************"
    echo "         GhostDroid Internal Audit Tool     "
    echo "********************************************"
    echo -e "\e[0m"
}

# Function to display the footer
display_footer() {
    echo -e "\e[2mWritten by Michael Errington, Founder of GhostSec\e[0m"
}

# Function to display a section title
display_section_title() {
    echo -e "\e[1m\e[94m$1\e[0m"
}

# Function to display a success message
display_success() {
    echo -e "\e[92m$1\e[0m"
}

# Function to display a warning message
display_warning() {
    echo -e "\e[93m$1\e[0m"
}

# Function to display an information message
display_info() {
    echo -e "\e[94m$1\e[0m"
}

# Display the header
display_header

# Function to handle errors
handle_error() {
    echo "Error: $1"
    exit 1
}

# Function to display the help menu
display_help() {
    echo "Android Audit Tool - Comprehensive Android app auditing"
    echo
    echo "Usage: android-audit [OPTIONS] [AUDIT_DIRECTORY]"
    echo
    echo "Options:"
    echo "  -h, --help         Display this help menu"
    echo "  -p, --packages     Specify specific packages to audit (comma-separated)"
    echo "  -a, --all          Audit all installed packages"
    echo
    echo "Examples:"
    echo "  android-audit -p com.example.app,com.another.app /path/to/audit_directory"
    echo "  android-audit -a /path/to/audit_directory"
}

# Install necessary packages and dependencies
pkg install -y aapt pm jq curl unzip apktool jadx mobSF || handle_error "Failed to install required packages."

# Directory to store audit information
audit_dir="$HOME/app_info"

# Option to specify the audit directory as an argument
if [ "$1" ]; then
    audit_dir="$1"
fi

# Ensure the audit directory exists
mkdir -p "$audit_dir" || handle_error "Failed to create audit directory."

# List installed packages and their information
pm list packages -3 -f | cut -d "=" -f 2 > "$audit_dir/app_list.txt" || handle_error "Failed to list installed packages."

# Function to extract app information using aapt and save it to a JSON file
extract_app_info() {
    package_name="$1"
    app_info_file="$audit_dir/${package_name}_info.json"
    aapt dump badging "$package_name" | jq -Rn 'reduce inputs as $line ({}; .[$line|split("=")[0]] = ($line|split("=")[1]))' > "$app_info_file" || handle_error "Failed to extract app information for $package_name."
}

# Function to create web redirects for specified package names
create_web_redirects() {
    package_name="$1"
    redirect_file="$audit_dir/${package_name}/web_redirects.txt"
    # Add your expert logic to generate web redirects here
    # Example: Use a web scraping tool to discover web links from the app
    # scrape_web_links "$package_name" > "$redirect_file"
}

# Function to decompile the app and analyze its source code
decompile_and_analyze() {
    package_name="$1"
    decompile_dir="$audit_dir/${package_name}/source_code"
    # Use apktool to decompile the app
    apktool d -o "$decompile_dir" "$package_name" || handle_error "Failed to decompile the app."

    # Perform advanced analysis on the decompiled source code
    # Example: Use JADX to analyze the decompiled Java code
    jadx -d "$decompile_dir" "$decompile_dir" || handle_error "Failed to analyze the app source code."
}

# Perform security checks and vulnerability assessments using MobSF
security_audit() {
    package_name="$1"
    security_report_dir="$audit_dir/${package_name}/security_report"
    mobSF -f "$package_name" -o "$security_report_dir" || handle_error "Failed to perform security audit."
}

# Process command line options
while [[ $# -gt 0 ]]; do
    case "$1" in
        -h|--help)
            display_help
            exit 0
            ;;
        -p|--packages)
            shift
            packages_to_audit=($(echo "$1" | tr ',' ' '))
            ;;
        -a|--all)
            packages_to_audit=($(cut -d "=" -f 2 "$audit_dir/app_list.txt"))
            ;;
        *)
            echo "Invalid option: $1"
            display_help
            exit 1
            ;;
    esac
    shift
done

# Option to specify specific packages to audit
for package in "${packages_to_audit[@]}"; do
    if grep -q "$package" "$audit_dir/app_list.txt"; then
        extract_app_info "$package"
        mkdir -p "$audit_dir/${package}"
        create_web_redirects "$package"
        decompile_and_analyze "$package"
        security_audit "$package"
    else
        echo "Package '$package' not found in the app list."
    fi
done

echo "App information and analysis reports have been saved in $audit_dir."