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Updated for Python3
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| #!/usr/bin/env python3 | |
| import hashlib | |
| import socket | |
| import struct | |
| import subprocess | |
| def main(): | |
| print("\n*********************************************************************") | |
| print("Cisco IOU License Generator - Kal 2011, python port of 2006 C version") | |
| print("2026 - Updated to Python 3") | |
| # get the host id and host name to calculate the hostkey | |
| hostid = subprocess.run(['hostid'], capture_output=True, text=True).stdout.strip() | |
| hostname = socket.gethostname() | |
| ioukey = int(hostid, 16) + sum(ord(c) for c in hostname) | |
| print(f"hostid={hostid}, hostname={hostname}, ioukey={ioukey:x}") | |
| # create the license using md5sum | |
| iou_pad1 = b"\x4b\x58\x21\x81\x56\x7b\x0d\xf3\x21\x43\x9b\x7e\xac\x1d\xe6\x8a" | |
| iou_pad2 = b"\x80" + 39 * b"\0" | |
| md5_input = iou_pad1 + iou_pad2 + struct.pack("!L", ioukey) + iou_pad1 | |
| iou_license = hashlib.md5(md5_input).hexdigest()[:16] | |
| # add license info to $HOME/.iourc | |
| print("\n*********************************************************************") | |
| print("Create the license file $HOME/.iourc with this command:") | |
| print(f" echo -e '[license]\\n{hostname} = {iou_license};' | tee $HOME/.iourc") | |
| print("\nThe command adds the following text to $HOME/.iourc:") | |
| print(f"[license]\n{hostname} = {iou_license};") | |
| # disable phone home feature | |
| print("\n*********************************************************************") | |
| print("Disable the phone home feature with this command:") | |
| print( | |
| " grep -q -F '127.0.0.1 xml.cisco.com' /etc/hosts || " | |
| "echo '127.0.0.1 xml.cisco.com' | sudo tee -a /etc/hosts" | |
| ) | |
| print("\nThe command adds the following text to /etc/hosts:") | |
| print("127.0.0.1 xml.cisco.com") | |
| print("\n*********************************************************************") | |
| if __name__ == "__main__": | |
| main() |
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