All these are trivial to use. Example using Python:
Cisco IOS devices use several password encryption types. Type 7 (often colloquially called "Password 7") employs a simple, known Vigenère cipher with a fixed key. While not a true hash, it is frequently mistaken for secure storage. This paper examines the algorithm behind Type 7, demonstrates how readily available "cracker" tools reverse it, and discusses security implications for network administrators. password 7 cracker cisco