Class: SdbDal::Crypto

Inherits:
Object
  • Object
show all
Defined in:
lib/sdb_dal/crypto.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Crypto

Returns a new instance of Crypto.



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# File 'lib/sdb_dal/crypto.rb', line 8

def initialize(options={})
  @cipher = OpenSSL::Cipher::Cipher.new("AES-256-CBC")

  @key=options[:cipher_key] if options.has_key?(:cipher_key)
  @iv=options[:cipher_iv] if options.has_key?(:cipher_iv)

  unless @key
    key_dir=options[:key_dir] if options.has_key?(:key_dir)
    key_dir ||="/tmp"

    if File.exists?(key_dir+'/.cipher_key')
      @key=File.open(key_dir+'/.cipher_key').read
    else
      @key =  @cipher.random_key()
      File.open(key_dir+"/.cipher_key",'w').write(@key)
    end
  end


  unless @iv
    if File.exists?(key_dir+'/.cipher_iv')
      @iv=File.open(key_dir+'/.cipher_iv').read
    else
      @iv =  @cipher.random_iv()
      File.open(key_dir+"/.cipher_iv",'w').write(@iv)
    end
  end
end

Instance Attribute Details

#iv ⇒ Object (readonly)

Returns the value of attribute iv.



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# File 'lib/sdb_dal/crypto.rb', line 7

def iv
  @iv
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/sdb_dal/crypto.rb', line 6

def key
  @key
end

Instance Method Details

#decrypt(text) ⇒ Object 



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# File 'lib/sdb_dal/crypto.rb', line 48

def decrypt(text)
  x=Base64.decode64(text)
  @cipher.decrypt(@key,@iv)
  @cipher.key = @key
  @cipher.iv = @iv
  d = @cipher.update(x)
  d << @cipher.final()
  return  d
end

#encrypt(text) ⇒ Object 



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# File 'lib/sdb_dal/crypto.rb', line 37

def encrypt(text)

  @cipher.encrypt(@key,@iv)
  @cipher.key=@key
  @cipher.iv = @iv
  e = @cipher.update(text)
  e << @cipher.final()
  Base64.encode64(e)#.chomp

end