mubix / c7decrypt

A Ruby-based implementation of a Cisco Type-7 Password Encryptor/Decryptor

C7Decrypt

A Ruby-based implementation of a Cisco Type-7 Password Encryptor/Decryptor

Key Benefits

• Written in Ruby - First and only Cisco Type-7 implementation in Ruby that I know of.
• Minimal/No Dependancies - Uses native Ruby to do it's work, no heavy dependancies.
• Not Just a Script - Implementation is portable for use in another project or for automation of tasks.
• Simple - It's a pretty small project so the interfaces are simple and easy to use.
• Encrypt & Decrypt - Supports both encryption (with seed control) and decryption operations.

Setup

To install, type

gem install c7decrypt

To use, just require

require 'c7decrypt'

Example Usage(s)

Get an instance of C7Decrypt

>> cd = C7Decrypt.new()
=> #<C7Decrypt:0x11b1700>

Decrypt A Single Encrypted Passwords

>> cd.decrypt("060506324F41")
=> "cisco"

Decrypt Array of Encrypted Passwords

>> encrypted_hashes = ["060506324F41", "0822455D0A16"]
=> ["060506324F41", "0822455D0A16"]
>> cd.decrypt_array(encrypted_hashes)
=> ["cisco", "cisco"]

Decrypt Encrypted Passwords from Config

>> cd.decrypt_config("cisco_config.txt")
=> ["cisco", "Password1", "admin"]

Encrypt A Single Plaintext Password

>> cd.encrypt("cisco")
=> "02050D480809"

Encrypt A Single Plaintext Password w/ Explicit Seed

>> cd.encrypt("cisco", 6)
=> "060506324F41"

Encrypt An Array of Plaintext Passwords

>> passwords = ["cisco", "password"]
=> ["cisco", "password"]
>> cd.encrypt_array(passwords)
=> ["02050D480809", "021605481811003348"]

Rubies Supported

This project is integrated with travis-ci and is regularly tested to work with the following rubies:

• 1.9.3
• 1.9.2
• 1.8.7
• ruby-head
• jruby-head
• jruby-19mode
• jruby-18mode
• rbx-19mode
• rbx-18mode
• ree

To checkout the current build status for these rubies, click here.

Contributing

If you're interesting contributing to this project, please see CONTRIBUTING.md

Credits

The decryption code in this project was inspired by Daren Matthew's cdecrypt.pl tool, which performs Cisco Type-7 decrypt operations in Perl.

Daren's tool can be found here in a blog post he wrote a while back:

Deobfuscating Cisco Type 7 Passwords

The encryption code in this project was inspired by a blog post at Moonie.com, which performs Cisco Type-7 decryptions and encryption operations in Perl.

The moonie.com blog post, which contains the original perl source can be found here:

Cisco (type 7) password decryption and encryption with Perl