Class: Gibberish::AES

Inherits:

Object

• Object
• Gibberish::AES

show all

Defined in:

lib/gibberish/aes.rb

Overview

cipher = Gibberish::AES.new('p4ssw0rd')
cipher.encrypt("some secret text")
#=> "U2FsdGVkX1/D7z2azGmmQELbMNJV/n9T/9j2iBPy2AM=\n"

cipher = Gibberish::AES.new('p4ssw0rd')
cipher.decrypt(""U2FsdGVkX1/D7z2azGmmQELbMNJV/n9T/9j2iBPy2AM=\n"")
#=> "some secret text"

echo "U2FsdGVkX1/D7z2azGmmQELbMNJV/n9T/9j2iBPy2AM=\n" | openssl enc -d -aes-256-cbc -a -k p4ssw0rd

Instance Attribute Summary (collapse)

• - (Object) cipher readonly

  Returns the value of attribute cipher.

• - (Object) password readonly

  Returns the value of attribute password.

• - (Object) size readonly

  Returns the value of attribute size.

Instance Method Summary (collapse)

• - (Object) decrypt(data, opts = {}) (also: #dec, #d)
• - (Object) encrypt(data, opts = {}) (also: #enc, #e)
• - (AES) initialize(password, size = 256) constructor

  Initialize with the password.

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# File 'lib/gibberish/aes.rb', line 34

def initialize(password, size=256)
  @password = password
  @size = size
  @cipher = OpenSSL::Cipher::Cipher.new("aes-#{size}-cbc")
end

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# File 'lib/gibberish/aes.rb', line 28

def cipher
  @cipher
end

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# File 'lib/gibberish/aes.rb', line 28

def password
  @password
end

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# File 'lib/gibberish/aes.rb', line 28

def size
  @size
end

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# File 'lib/gibberish/aes.rb', line 54

def decrypt(data, opts={})
  data = Base64.decode64(data)
  salt = data[8..15]
  data = data[16..-1]
  setup_cipher(:decrypt, salt)
  cipher.update(data) + cipher.final
end

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# File 'lib/gibberish/aes.rb', line 40

def encrypt(data, opts={})
  salt = generate_salt
  setup_cipher(:encrypt, salt)
  e = cipher.update(data) + cipher.final
  e = "Salted__#{salt}#{e}" #OpenSSL compatible
  if opts[:binary]
    e
  else
    Base64.encode64(e)
  end
end