Maya Secure User Setup Checksum Verification [work] 📢

import hashlib def generate_checksum(file_path): sha256_hash = hashlib.sha256() with open(file_path, "rb") as f: # Read the file in chunks to handle larger files efficiently for byte_block in iter(lambda: f.read(4096), b""): sha256_hash.update(byte_block) return sha256_hash.hexdigest() master_setup_path = "/network/pipeline/maya/config/userSetup.py" print(f"Master Checksum: generate_checksum(master_setup_path)") Use code with caution. Step 2: Deploy the Bootstrap Launcher

Maya uses a —a unique digital fingerprint of the script's contents—to ensure no unauthorized changes have been made.

Modern versions of Maya include a native window (introduced via the MayaScanner plugin framework). Ensure that: Security Execution Mode is set to Strict . Only explicit, trusted plugin paths are whitelisted. 2. Restrict Write Permissions

Restrict write access to the network pipeline deployment folders to authorized administrators and system services only. 3. Leverage Environment Variables maya secure user setup checksum verification

Maya automatically executes any userSetup.py or userSetup.mel file it finds within its script paths upon initialization. This feature is incredibly useful for technical directors (TDs) to initialize tools, set environment variables, and load plug-ins automatically.

What (Windows, Linux, macOS) your studio runs? Do you use a pipeline manager like Rez or ShotGrid?

import os import sys import hashlib from maya import cmds # Define the expected SHA-256 hash of your clean userSetup.py EXPECTED_HASH = "PROTECTED_HASH_STRING_GENERATED_IN_STEP_1" def verify_and_load_setup(): # Locate the target userSetup.py file maya_app_dir = cmds.internalVar(userScriptDir=True) target_script = os.path.join(maya_app_dir, "userSetup.py") # If the file does not exist, halt execution to prevent silent drops if not os.path.exists(target_script): cmds.warning("Secure Boot: userSetup.py missing. Initialization aborted.") return False # Calculate the current hash of the file sha256_hash = hashlib.sha256() try: with open(target_script, "rb") as f: for byte_block in iter(lambda: f.read(4096), b""): sha256_hash.update(byte_block) current_hash = sha256_hash.hexdigest() except Exception as e: cmds.error(f"Secure Boot: Failed to read setup file. Error: e") return False # Perform the verification check if current_hash == EXPECTED_HASH: print("Secure Boot: Checksum verification passed. File is authentic.") return True else: # Halt execution, raise a critical UI error dialog, and alert the user error_msg = "CRITICAL SECURITY WARNING: userSetup.py modification detected!" cmds.confirmDialog( title="Security Alert", message=error_msg, button=["OK"], defaultButton="OK", icon="critical" ) cmds.error(error_msg) return False # Execute verification before letting Maya process the rest of the application if verify_and_load_setup(): # If safe, explicitly execute the verified file contents manually pass Use code with caution. Studio Pipeline Best Practices Ensure that: Security Execution Mode is set to Strict

: Every time you close or open Maya, the software re-scans the file. If the fingerprint has changed—meaning a script was added or edited—Maya stops and asks for your permission. 🛡️ Key Takeaways

Checksum verification is a security method that uses a hash function to generate a unique digital fingerprint of a file’s contents. In the context of Maya's security model:

Checksum drift can occur after setup due to unauthorized changes. Use the verification cron job: Restrict Write Permissions Restrict write access to the

In a secure Maya environment, checksum verification acts as a "gatekeeper." Before Maya is allowed to import a plugin or run a startup script, a wrapper script calculates the file's current checksum and compares it against a "known-good" database. If they don't match, the execution is blocked. Implementing a Secure Workflow 1. Centralize Your Scripts

Silently write the failure event, computer name, user account, timestamp, and the malicious script's live hash to a centralized log server or SIEM platform for forensic analysis by your IT department. Conclusion

In Autodesk Maya, "Secure userSetup Checksum verification" is a security feature designed to prevent unauthorized or malicious scripts from executing automatically when Maya starts. The userSetup.py or userSetup.mel files are commonly used for customization but can be targeted by malware. Managing Security Settings