# Copyright Security Onion Solutions LLC and/or licensed to Security Onion Solutions LLC under one
# or more contributor license agreements. Licensed under the Elastic License 2.0 as shown at
# https://securityonion.net/license; you may not use this file except in compliance with the
# Elastic License 2.0.
#
# Note: Per the Elastic License 2.0, the second limitation states:
#
#   "You may not move, change, disable, or circumvent the license key functionality
#    in the software, and you may not remove or obscure any functionality in the
#    software that is protected by the license key."

"""
TODO: Change default disk_size from 6G to 220G. this was set to speed up vm start during development
      Remove passwd hash prior to release. used for development

This runner performs the initial setup required for hypervisor hosts in the Security Onion environment.
It handles downloading the Oracle Linux KVM image, setting up SSH keys for secure communication,
and creating virtual machines with cloud-init configuration.

Usage:
    salt-run setup_hypervisor.<function> [arguments]

Options:
    vm_name:     Name for the virtual machine (alphanumeric, hyphens, underscores)
    disk_size:   Size of the VM disk with unit (e.g., '6G', '300G')
    minion_id:   Salt minion ID of the hypervisor (optional)

Examples:
    # Complete environment setup (default VM 'sool9' with 6G disk)
    salt-run setup_hypervisor.setup_environment

    # Setup with custom VM name and disk size
    salt-run setup_hypervisor.setup_environment myvm 300G

    # Regenerate SSH keys
    salt-run setup_hypervisor.regenerate_ssh_keys

    # Create additional VM
    salt-run setup_hypervisor.create_vm myvm2 300G

    Notes:
        - Verifies Security Onion license
        - Downloads and validates Oracle Linux KVM image if needed
        - Generates Ed25519 SSH keys if not present
        - Creates/recreates VM based on environment changes
        - Forces hypervisor configuration via highstate after successful setup (when minion_id provided)

    Description:
        The setup process includes:
        1. License validation
        2. Oracle Linux KVM image download and checksum verification
        3. SSH key generation for secure VM access
        4. Cloud-init configuration for VM provisioning
        5. VM creation with specified disk size
        6. Hypervisor configuration via highstate (when minion_id provided and setup successful)

Exit Codes:
    Success: Returns dictionary with 'success': True and VM details
    Failure: Returns dictionary with 'success': False and error message

Logging:
    All operations are logged to:
    - Standard output (INFO level and above)
    - System log with 'setup_hypervisor' tag
"""

import base64
import hashlib
import logging
import os
import pwd
import requests
import salt.client
import salt.utils.files
import socket
import sys
import time
import yaml
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import ed25519

# Configure logging
log = logging.getLogger(__name__)
log.setLevel(logging.DEBUG)

# Ensure we have a stream handler
stream_handler = logging.StreamHandler(sys.stdout)
stream_handler.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
stream_handler.setFormatter(formatter)
log.addHandler(stream_handler)

def _read_and_encode_key(key_path: str) -> str:
    """Read a key file and return its base64 encoded content."""
    try:
        with salt.utils.files.fopen(key_path, 'rb') as f:
            content = f.read()
            return base64.b64encode(content).decode('utf-8')
    except Exception as e:
        log.error("Error reading key file %s: %s", key_path, str(e))
        raise

def _check_license():
    """Check if the license file exists and contains required values."""
    license_path = '/opt/so/saltstack/local/pillar/soc/license.sls'
    
    if not os.path.exists(license_path):
        log.error("LICENSE: License file not found at %s", license_path)
        return False
        
    try:
        with salt.utils.files.fopen(license_path, 'r') as f:
            license_data = yaml.safe_load(f)
            
        if not license_data:
            log.error("LICENSE: Empty or invalid license file")
            return False
            
        license_id = license_data.get('license_id')
        features = license_data.get('features', [])
        
        if not license_id:
            log.error("LICENSE: No license_id found in license file")
            return False
            
        if 'hvn' not in features:
            log.error("LICENSE: 'hvn' feature not found in license")
            return False
            
        log.info("LICENSE: License validation successful")
        return True
            
    except Exception as e:
        log.error("LICENSE: Error reading license file: %s", str(e))
        return False

def _check_file_exists(path):
    """Check if a file exists and create its directory if needed."""
    if os.path.exists(path):
        return True
    os.makedirs(os.path.dirname(path), exist_ok=True)
    return False

def _validate_image_checksum(path, expected_sha256):
    """
    Validate the checksum of an existing image file.
    Returns:
        bool: True if checksum matches, False otherwise
    """
    sha256_hash = hashlib.sha256()
    with salt.utils.files.fopen(path, 'rb') as f:
        for chunk in iter(lambda: f.read(4096), b''):
            sha256_hash.update(chunk)
    
    downloaded_sha256 = sha256_hash.hexdigest()
    if downloaded_sha256 != expected_sha256:
        log.error("VALIDATE: Checksum validation failed for %s - expected: %s, got: %s",
                 path, expected_sha256, downloaded_sha256)
        return False
    
    log.info("VALIDATE: Checksum validation successful for %s", path)
    return True

# Constants
IMAGE_URL = "https://yum.oracle.com/templates/OracleLinux/OL9/u5/x86_64/OL9U5_x86_64-kvm-b253.qcow2"
IMAGE_SHA256 = "3b00bbbefc8e78dd28d9f538834fb9e2a03d5ccdc2cadf2ffd0036c0a8f02021"
IMAGE_PATH = "/nsm/libvirt/boot/OL9U5_x86_64-kvm-b253.qcow2"

def _download_image():
    """
    Download and validate the Oracle Linux KVM image.
    Returns:
        bool: True if successful or file exists with valid checksum, False on error
    """
    # Check if file already exists and validate checksum
    if _check_file_exists(IMAGE_PATH):
        if _validate_image_checksum(IMAGE_PATH, IMAGE_SHA256):
            return True
        else:
            log.warning("DOWNLOAD: Existing image has invalid checksum, will re-download")
            os.unlink(IMAGE_PATH)
    
    log.info("DOWNLOAD: Starting image download process")

    try:
        # Download file
        log.info("DOWNLOAD: Downloading Oracle Linux KVM image from %s to %s", IMAGE_URL, IMAGE_PATH)
        response = requests.get(IMAGE_URL, stream=True)
        response.raise_for_status()

        # Get total file size for progress tracking
        total_size = int(response.headers.get('content-length', 0))
        downloaded_size = 0
        last_log_time = 0

        # Save file with progress logging
        with salt.utils.files.fopen(IMAGE_PATH, 'wb') as f:
            for chunk in response.iter_content(chunk_size=8192):
                f.write(chunk)
                downloaded_size += len(chunk)
                
                # Log progress every second
                current_time = time.time()
                if current_time - last_log_time >= 1:
                    progress = (downloaded_size / total_size) * 100 if total_size > 0 else 0
                    log.info("DOWNLOAD: Progress - %.1f%% (%d/%d bytes)", 
                            progress, downloaded_size, total_size)
                    last_log_time = current_time

        # Validate downloaded file
        if not _validate_image_checksum(IMAGE_PATH, IMAGE_SHA256):
            os.unlink(IMAGE_PATH)
            return False

        log.info("DOWNLOAD: Successfully downloaded and validated Oracle Linux KVM image")
        return True

    except Exception as e:
        log.error("DOWNLOAD: Error downloading hypervisor image: %s", str(e))
        if os.path.exists(IMAGE_PATH):
            os.unlink(IMAGE_PATH)
        return False

def _check_ssh_keys_exist():
    """
    Check if SSH keys already exist.
    Returns:
        bool: True if both private and public keys exist, False otherwise
    """
    key_dir = '/etc/ssh/auth_keys/soqemussh'
    key_path = f'{key_dir}/id_ed25519'
    pub_key_path = f'{key_path}.pub'
    dest_dir = '/opt/so/saltstack/local/salt/libvirt/ssh/keys'
    dest_path = os.path.join(dest_dir, os.path.basename(pub_key_path))

    if os.path.exists(key_path) and os.path.exists(pub_key_path) and os.path.exists(dest_path):
        log.info("SETUP_KEYS: SSH keys already exist")
        return True
    return False

def _setup_ssh_keys():
    """
    Generate and set up SSH keys.
    Returns:
        bool: True if successful, False on error
    """
    try:
        key_dir = '/etc/ssh/auth_keys/soqemussh'
        key_path = f'{key_dir}/id_ed25519'
        pub_key_path = f'{key_path}.pub'

        # Check if keys already exist
        if _check_ssh_keys_exist():
            return True

        # Create key directories if they don't exist and set permissions
        log.info("SETUP_KEYS: Setting up SSH directory and keys")
        parent_dir = os.path.dirname(key_dir)  # /etc/ssh/auth_keys
        os.makedirs(parent_dir, exist_ok=True)
        os.chmod(parent_dir, 0o700)
        
        os.makedirs(key_dir, exist_ok=True)
        os.chmod(key_dir, 0o700)

        # Generate new ed25519 key pair
        log.info("SETUP_KEYS: Generating new SSH keys")
        private_key = ed25519.Ed25519PrivateKey.generate()
        public_key = private_key.public_key()

        # Serialize private key
        private_bytes = private_key.private_bytes(
            encoding=serialization.Encoding.PEM,
            format=serialization.PrivateFormat.OpenSSH,
            encryption_algorithm=serialization.NoEncryption()
        )

        # Serialize public key and format it as an OpenSSH public key
        public_bytes = public_key.public_bytes(
            encoding=serialization.Encoding.OpenSSH,
            format=serialization.PublicFormat.OpenSSH
        )
        public_bytes = public_bytes + b' soqemussh@salt-master\n'

        # Write the keys to files
        with salt.utils.files.fopen(key_path, 'wb') as f:
            f.write(private_bytes)

        with salt.utils.files.fopen(pub_key_path, 'wb') as f:
            f.write(public_bytes)

        # Set proper permissions
        os.chmod(key_path, 0o600)
        os.chmod(pub_key_path, 0o644)

        log.info("SETUP_KEYS: SSH keys generated successfully")

        # Copy public key to saltstack directory
        dest_dir = '/opt/so/saltstack/local/salt/libvirt/ssh/keys'
        os.makedirs(dest_dir, exist_ok=True)
        dest_path = os.path.join(dest_dir, os.path.basename(pub_key_path))
        
        with salt.utils.files.fopen(pub_key_path, 'rb') as src:
            with salt.utils.files.fopen(dest_path, 'wb') as dst:
                dst.write(src.read())
        
        log.info("SETUP_KEYS: Public key copied to %s", dest_dir)
        return True

    except Exception as e:
        log.error("SETUP_KEYS: Error setting up SSH keys: %s", str(e))
        return False

def _check_vm_exists(vm_name: str) -> bool:
    """
    Check if VM files already exist.
    Returns:
        bool: True if VM files exist, False otherwise
    """
    base_dir = '/opt/so/saltstack/local/salt/libvirt/images'
    vm_dir = f'{base_dir}/{vm_name}'
    vm_image = os.path.join(vm_dir, f'{vm_name}.qcow2')
    cidata_iso = os.path.join(vm_dir, f'{vm_name}-cidata.iso')
    
    required_files = [
        vm_image,
        cidata_iso,
        os.path.join(vm_dir, 'meta-data'),
        os.path.join(vm_dir, 'user-data')
    ]
    
    exists = all(os.path.exists(f) for f in required_files)
    if exists:
        log.info("MAIN: VM %s already exists", vm_name)
    return exists

def setup_environment(vm_name: str = 'sool9', disk_size: str = '6G', minion_id: str = None):
    """
    Main entry point to set up the hypervisor environment.

    This function orchestrates the complete setup process for a Security Onion hypervisor,
    including image management, SSH key setup, and VM creation. It ensures all components
    are properly configured and validates the environment at each step.

    Args:
        vm_name (str, optional): Name for the VM to create. Must contain only
                                alphanumeric characters, hyphens, or underscores.
                                Defaults to 'sool9'.
        disk_size (str, optional): Size of the VM disk with unit (e.g., '6G', '300G').
                                  Must end with 'G' or 'M'. Defaults to '6G'.
        minion_id (str, optional): Salt minion ID of the hypervisor. When provided,
                                  forces the hypervisor to apply its configuration via
                                  highstate after successful environment setup (image
                                  download, SSH keys, VM creation).

    Returns:
        dict: A dictionary containing:
            - success (bool): True if setup completed successfully
            - error (str): Error message if setup failed, None otherwise
            - vm_result (dict): Details about VM creation if successful

    Notes:
        - Verifies Security Onion license
        - Downloads and validates Oracle Linux KVM image if needed
        - Generates Ed25519 SSH keys if not present
        - Creates/recreates VM based on environment changes
        - Forces hypervisor configuration via highstate after successful setup
          (when minion_id is provided)

    Example:
        result = setup_environment('myvm', '300G', 'hypervisor1')
        if result['success']:
            print(f"VM created at {result['vm_result']['vm_dir']}")
        else:
            print(f"Setup failed: {result['error']}")
    """
    # Check license before proceeding
    if not _check_license():
        return {
            'success': False,
            'error': 'Invalid license or missing hvn feature',
            'vm_result': None
        }

    log.info("MAIN: Starting setup_environment in setup_hypervisor runner")
    
    # Check if environment is already set up
    image_exists = _check_file_exists(IMAGE_PATH)
    image_valid = image_exists and _validate_image_checksum(IMAGE_PATH, IMAGE_SHA256)
    keys_exist = _check_ssh_keys_exist()
    vm_exists = _check_vm_exists(vm_name)

    # Track if we need to create/recreate VM
    create_vm_needed = False
    
    # Handle image setup if needed
    if not image_valid:
        log.info("MAIN: Starting image download/validation process")
        if not _download_image():
            log.error("MAIN: Image download failed")
            return {
                'success': False,
                'error': 'Image download failed',
                'vm_result': None
            }
        create_vm_needed = True
    
    # Handle SSH key setup if needed
    if not keys_exist:
        log.info("MAIN: Setting up SSH keys")
        if not _setup_ssh_keys():
            log.error("MAIN: SSH key setup failed")
            return {
                'success': False,
                'error': 'SSH key setup failed',
                'vm_result': None
            }
        create_vm_needed = True

    # Create/recreate VM if needed
    if create_vm_needed or not vm_exists:
        if vm_exists:
            log.info("MAIN: Environment changes detected, recreating VM %s", vm_name)
        else:
            log.info("MAIN: Creating new VM %s", vm_name)
        vm_result = create_vm(vm_name, disk_size)
    else:
        log.info("MAIN: No changes detected, using existing VM %s", vm_name)
        vm_result = {
            'success': True,
            'vm_dir': f'/opt/so/saltstack/local/salt/libvirt/images/{vm_name}'
        }
    
    success = vm_result.get('success', False)
    log.info("MAIN: Setup environment completed with status: %s", "SUCCESS" if success else "FAILED")
    
    # If setup was successful and we have a minion_id, run highstate
    if success and minion_id:
        log.info("MAIN: Running highstate on hypervisor %s", minion_id)
        try:
            # Initialize the LocalClient
            local = salt.client.LocalClient()
            # Run highstate on the hypervisor
            highstate_result = local.cmd(minion_id, 'state.highstate', [], timeout=1800)
            if highstate_result and minion_id in highstate_result:
                log.info("MAIN: Highstate completed on %s", minion_id)
            else:
                log.error("MAIN: Highstate failed or timed out on %s", minion_id)
        except Exception as e:
            log.error("MAIN: Error running highstate on %s: %s", minion_id, str(e))

    return {
        'success': success,
        'error': vm_result.get('error') if not success else None,
        'vm_result': vm_result
    }

def create_vm(vm_name: str, disk_size: str = '6G'):
    """
    Creates a new virtual machine with cloud-init configuration.

    This function handles the complete VM creation process, including directory setup,
    image management, and cloud-init configuration. It ensures proper setup of the VM
    environment with all necessary components.

    Args:
        vm_name (str): Name for the VM. Must contain only alphanumeric characters,
                      hyphens, or underscores.
        disk_size (str): Size of the VM disk with unit (e.g., '6G', '300G').
                        Must end with 'G' or 'M'. Defaults to '6G'.

    Returns:
        dict: A dictionary containing:
            - success (bool): True if VM creation completed successfully
            - error (str): Error message if creation failed
            - vm_dir (str): Path to VM directory if successful

    Notes:
        - Validates Security Onion license
        - Creates cloud-init ISO for VM configuration
        - Copies and resizes base Oracle Linux image
        - Compresses final image for efficiency
        - Generates SHA256 hash for verification
        - Configures repositories and GPG keys
        - Sets up system services and storage

    Example:
        result = create_vm('myvm', '300G')
        if result['success']:
            print(f"VM created at {result['vm_dir']}")
        else:
            print(f"Creation failed: {result['error']}")
    """
    # Check license before proceeding
    if not _check_license():
        return {
            'success': False,
            'error': 'Invalid license or missing hvn feature',
        }

    try:
        # Input validation
        if not isinstance(vm_name, str) or not vm_name:
            log.error("CREATEVM: Invalid VM name")
            return {'success': False, 'error': 'Invalid VM name'}
        
        if not vm_name.isalnum() and not all(c in '-_' for c in vm_name if not c.isalnum()):
            log.error("CREATEVM: VM name must contain only alphanumeric characters, hyphens, or underscores")
            return {'success': False, 'error': 'Invalid VM name format'}

        # Validate disk size format
        if not isinstance(disk_size, str) or not disk_size.endswith(('G', 'M')):
            log.error("CREATEVM: Invalid disk size format. Must end with G or M")
            return {'success': False, 'error': 'Invalid disk size format'}
            
        try:
            size_num = int(disk_size[:-1])
            if size_num <= 0:
                raise ValueError
        except ValueError:
            log.error("CREATEVM: Invalid disk size number")
            return {'success': False, 'error': 'Invalid disk size number'}

        # Ensure base image exists
        if not os.path.exists(IMAGE_PATH):
            log.error("CREATEVM: Base image not found at %s", IMAGE_PATH)
            return {'success': False, 'error': 'Base image not found'}

        # Set up directory structure
        base_dir = '/opt/so/saltstack/local/salt/libvirt/images'
        vm_dir = f'{base_dir}/{vm_name}'
        os.makedirs(vm_dir, exist_ok=True)

        # Read the SSH public key
        pub_key_path = '/opt/so/saltstack/local/salt/libvirt/ssh/keys/id_ed25519.pub'
        try:
            with salt.utils.files.fopen(pub_key_path, 'r') as f:
                ssh_pub_key = f.read().strip()
        except Exception as e:
            log.error("CREATEVM: Failed to read SSH public key: %s", str(e))
            return {'success': False, 'error': 'Failed to read SSH public key'}

        # Get hostname for repo configuration
        manager_hostname = socket.gethostname()

        # Read and encode GPG keys
        keys_dir = '/opt/so/saltstack/default/salt/repo/client/files/oracle/keys'
        oracle_key = _read_and_encode_key(os.path.join(keys_dir, 'RPM-GPG-KEY-oracle'))
        epel_key = _read_and_encode_key(os.path.join(keys_dir, 'RPM-GPG-KEY-EPEL-9'))
        salt_key = _read_and_encode_key(os.path.join(keys_dir, 'SALT-PROJECT-GPG-PUBKEY-2023.pub'))
        docker_key = _read_and_encode_key(os.path.join(keys_dir, 'docker.pub'))
        securityonion_key = _read_and_encode_key(os.path.join(keys_dir, 'securityonion.pub'))

        # Create meta-data
        meta_data = f"""instance-id: {vm_name}
local-hostname: {vm_name}
"""
        meta_data_path = os.path.join(vm_dir, 'meta-data')
        with salt.utils.files.fopen(meta_data_path, 'w') as f:
            f.write(meta_data)

        # Create user-data
        user_data = f"""#cloud-config
preserve_hostname: False
hostname: {vm_name}
fqdn: {vm_name}.local

# The passwd hash will be removed at release and is being used for debugging during development
users:
    - default
    - name: soqemussh
      groups: ['wheel']
      shell: /bin/bash
      sudo: ALL=(ALL) NOPASSWD:ALL
      lock_passwd: false
      passwd: $6$THWuTZMZhIVMGaaw$w9kozn7z7i0Y9LRVGZwN6mcZag4vMpE3hW6eCtKNHlFpL1XLcOdiIr29JyDxx3MLBXNedIqnqcj4psqCjv58d.
      ssh_authorized_keys:
        - {ssh_pub_key}

# Configure where output will go
output:
  all: ">> /var/log/cloud-init.log"

# configure interaction with ssh server
ssh_genkeytypes: ['ed25519', 'rsa']

# set timezone for VM
timezone: UTC

# Disable cloud-init network configuration to prevent conflicts with NetworkManager
network:
  config: disabled

write_files:
  - path: /etc/yum.repos.d/securityonion.repo
    content: |
      [securityonion]
      name=Security Onion Repo
      baseurl=https://{manager_hostname}/repo
      enabled=1
      gpgcheck=1
      sslverify=0
  - path: /etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
    encoding: b64
    content: |
      {oracle_key}
  - path: /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-9
    encoding: b64
    content: |
      {epel_key}
  - path: /etc/pki/rpm-gpg/SALT-PROJECT-GPG-PUBKEY-2023.pub
    encoding: b64
    content: |
      {salt_key}
  - path: /etc/pki/rpm-gpg/docker.pub
    encoding: b64
    content: |
      {docker_key}
  - path: /etc/pki/rpm-gpg/securityonion.pub
    encoding: b64
    content: |
      {securityonion_key}

runcmd:
  # Import GPG keys and remove repo files except securityonion.repo
  - rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
  - rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-9
  - rpm --import /etc/pki/rpm-gpg/SALT-PROJECT-GPG-PUBKEY-2023.pub
  - rpm --import /etc/pki/rpm-gpg/docker.pub
  - rpm --import /etc/pki/rpm-gpg/securityonion.pub
  - for f in /etc/yum.repos.d/*.repo; do if [ "$(basename $f)" != "securityonion.repo" ]; then rm -f "$f"; fi; done
  - systemctl enable --now serial-getty@ttyS0.service
  - systemctl enable --now NetworkManager
  - systemctl enable --now qemu-guest-agent
  - growpart /dev/vda 2
  - pvresize /dev/vda2
  - lvextend -l +100%FREE /dev/vg_main/lv_root
  - xfs_growfs /dev/vg_main/lv_root
  - touch /etc/cloud/cloud-init.disabled
  - rm -f /etc/sysconfig/network-scripts/ifcfg-eth0

power_state:
  delay: "now"
  mode: poweroff
  timeout: 30
  condition: True
"""
        user_data_path = os.path.join(vm_dir, 'user-data')
        with salt.utils.files.fopen(user_data_path, 'w') as f:
            f.write(user_data)

        # Copy and resize base image
        base_image = IMAGE_PATH
        vm_image = os.path.join(vm_dir, f'{vm_name}.qcow2')
        
        # Copy base image with progress logging
        import shutil
        log.info("CREATEVM: Copying base image to %s", vm_image)
        shutil.copy2(base_image, vm_image)
        log.info("CREATEVM: Base image copy complete")
        
        # Get current image size
        import subprocess
        try:
            result = subprocess.run(['qemu-img', 'info', '--output=json', vm_image], 
                                  check=True, capture_output=True, text=True)
            import json
            info = json.loads(result.stdout)
            current_size = info.get('virtual-size', 0)
            requested_size = int(disk_size[:-1]) * (1024**3 if disk_size.endswith('G') else 1024**2)
            
            # Only resize if requested size is larger
            if requested_size > current_size:
                log.info("CREATEVM: Resizing image to %s", disk_size)
                try:
                    result = subprocess.run(['qemu-img', 'resize', '-f', 'qcow2', vm_image, disk_size], 
                                          check=True, capture_output=True, text=True)
                    log.info("CREATEVM: Image resize complete")
                except subprocess.CalledProcessError as e:
                    log.error("CREATEVM: Failed to resize image: %s", e.stderr)
                    raise
            else:
                log.info("CREATEVM: Image already at or larger than requested size")
        except subprocess.CalledProcessError as e:
            log.error("CREATEVM: Failed to get image info: %s", e.stderr)
            raise
        except json.JSONDecodeError as e:
            log.error("CREATEVM: Failed to parse image info: %s", str(e))
            raise
        
        # Compress image
        temp_image = f"{vm_image}.temp"
        log.info("CREATEVM: Compressing image")
        
        # Start compression in a subprocess
        process = subprocess.Popen(['qemu-img', 'convert', '-O', 'qcow2', '-c', vm_image, temp_image],
                                 stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        
        # Monitor progress by checking output file size
        source_size = os.path.getsize(vm_image)
        last_log_time = 0
        
        while process.poll() is None:  # While compression is running
            current_time = time.time()
            if current_time - last_log_time >= 1:  # Log every second
                if os.path.exists(temp_image):
                    compressed_size = os.path.getsize(temp_image)
                    progress = (compressed_size / source_size) * 100
                    log.info("CREATEVM: Compression progress - %.1f%% (%d/%d bytes)",
                            progress, compressed_size, source_size)
                last_log_time = current_time
        
        # Check if compression completed successfully
        if process.returncode == 0:
            os.replace(temp_image, vm_image)
            log.info("CREATEVM: Image compression complete")
        else:
            error = process.stderr.read().decode('utf-8')
            log.error("CREATEVM: Failed to compress image: %s", error)
            if os.path.exists(temp_image):
                os.unlink(temp_image)
            raise subprocess.CalledProcessError(process.returncode, 'qemu-img convert', stderr=error)

        # Create cloud-init ISO
        cidata_iso = os.path.join(vm_dir, f'{vm_name}-cidata.iso')
        subprocess.run(['mkisofs', '-output', cidata_iso, '-volid', 'CIDATA', '-rock',
                       user_data_path, meta_data_path],
                      check=True, capture_output=True)

        # Generate SHA256 hash of the qcow2 image
        sha256_hash = hashlib.sha256()
        with salt.utils.files.fopen(vm_image, 'rb') as f:
            for chunk in iter(lambda: f.read(4096), b''):
                sha256_hash.update(chunk)
        
        # Write hash to file
        hash_file = os.path.join(vm_dir, f'{vm_name}.sha256')
        with salt.utils.files.fopen(hash_file, 'w') as f:
            f.write(sha256_hash.hexdigest())
        
        log.info("CREATEVM: Generated SHA256 hash for %s", vm_image)

        return {
            'success': True,
            'vm_dir': vm_dir
        }

    except Exception as e:
        log.error("CREATEVM: Error creating VM: %s", str(e))
        return {'success': False, 'error': str(e)}

def regenerate_ssh_keys():
    """
    Regenerates SSH keys used for hypervisor VM access.

    This function handles the complete process of SSH key regeneration, including
    validation, cleanup of existing keys, and generation of new keys with proper
    permissions and distribution.

    Returns:
        bool: True if keys were successfully regenerated, False otherwise

    Notes:
        - Validates Security Onion license
        - Removes existing keys if present
        - Generates new Ed25519 key pair
        - Sets secure permissions (600 for private, 644 for public)
        - Distributes public key to required locations

    Description:
        The function performs these steps:
        1. Validates Security Onion license
        2. Checks for existing SSH keys
        3. Removes old keys if present
        4. Creates required directories with secure permissions
        5. Generates new Ed25519 key pair
        6. Sets appropriate file permissions
        7. Distributes public key to required locations

    Example:
        if regenerate_ssh_keys():
            print("SSH keys successfully regenerated")
        else:
            print("Failed to regenerate SSH keys")
    """
    # Check license before proceeding
    if not _check_license():
        log.error("MAIN: Invalid license or missing hvn feature")
        return False

    log.info("MAIN: Starting SSH key regeneration")
    try:
        # Verify current state
        if not _check_ssh_keys_exist():
            log.warning("MAIN: No existing SSH keys found to regenerate")
            return _setup_ssh_keys()

        # Remove existing keys
        key_dir = '/etc/ssh/auth_keys/soqemussh'
        key_path = f'{key_dir}/id_ed25519'
        pub_key_path = f'{key_path}.pub'
        dest_dir = '/opt/so/saltstack/local/salt/libvirt/ssh/keys'
        dest_path = os.path.join(dest_dir, os.path.basename(pub_key_path))

        for path in [key_path, pub_key_path, dest_path]:
            try:
                os.unlink(path)
                log.info("MAIN: Removed existing key: %s", path)
            except FileNotFoundError:
                log.warning("MAIN: Key file not found: %s", path)

        # Generate new keys
        if _setup_ssh_keys():
            log.info("MAIN: SSH keys regenerated successfully")
            return True
        
        log.error("MAIN: Failed to regenerate SSH keys")
        return False

    except Exception as e:
        log.error("MAIN: Error regenerating SSH keys: %s", str(e))
        return False