Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/aesthetikx/ovaltine
Simple cryptography utilities in ruby
https://github.com/aesthetikx/ovaltine
Last synced: about 2 months ago
JSON representation
Simple cryptography utilities in ruby
- Host: GitHub
- URL: https://github.com/aesthetikx/ovaltine
- Owner: Aesthetikx
- License: mit
- Created: 2014-09-11T16:31:48.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2021-04-12T13:09:57.000Z (over 3 years ago)
- Last Synced: 2024-03-19T14:43:32.847Z (10 months ago)
- Language: Ruby
- Homepage:
- Size: 93.8 KB
- Stars: 0
- Watchers: 4
- Forks: 0
- Open Issues: 19
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
- Code of conduct: CODE_OF_CONDUCT.md
Awesome Lists containing this project
README
ovaltine
============
Simple cryptography utilities in ruby
## Installation
Add this line to your application's Gemfile:
```ruby
gem 'ovaltine'
```
And then execute:
$ bundle
Or install it yourself as:
$ gem install ovaltine
```ruby
require 'ovaltine'
```
## Usage
###Playfair Cipher
```ruby
pf = Ovaltine::Playfair.new("passcode")
puts pf
# [ p a s c o ]
# [ d e b f g ]
# [ h ij k l m ]
# [ n q r t u ]
# [ v w x y z ]
ciphertext = pf.encode "The last Metroid is in captivity. The galaxy is at peace..."
# => "nlfijsculfqushekahqoscnhwlqcyijdeoijcyzkacqadsobw"
passcode = pf.decode ciphertext
# => "thelastmetroidisincaptivitythegalaxyisatpeacex"
```
###Frequency Analysis
Helpful methods mixed into String
```ruby
# Sample text
text = "Jerry was a race car driver".downcase.gsub(/\s/,'')
```
Find the letter frequency of a text:
```ruby
text.letter_frequency
# => {"j"=>1, "e"=>3, "r"=>6, "y"=>1, "w"=>1, "a"=>4, "s"=>1, ...
```
Find the three most frequent digrams:
```ruby
text.digram_frequency.sort_by { |digram, frequency| frequency}.reverse.take(3)
# => [["er", 2], ["ar", 2], ["ra", 1]]
```
Other available methods:
```ruby
text.trigram_frequency
text.ngram_frequency(8)
```
###Co-prime numbers
Generate the co-primes (< 26) of 26
```ruby
26.coprimes
# => [1, 3, 5, 7, 9, 11, 15, 17, 19, 21, 23, 25]
```
###DES
Cryptographically insecure Data Encryption Standard implementation
####Key Schedule
Generate the 8th round subkey:
```ruby
Ovaltine::DES::KeySchedule.new("133457799BBCDFF1").keys[7]
# => "111101111000101000111010110000010011101111111011"
```
### Toy Tetragraph Hash
Simple toy hash implementation
```ruby
Ovaltine::TTH.hash("I leave twenty million dollars to my friendly cousin Bill.")
# => "BFQG"
Ovaltine::TTH.hash("AYHGD")
# => "BFQG"
```
## Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/Aesthetikx/ovaltine. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](contributor-covenant.org) code of conduct.
## License
The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).