Class: Nexus::Cipher

Inherits:
Object
  • Object
show all
Defined in:
lib/nexus/cipher.rb

Instance Method Summary collapse

Constructor Details

#initialize(pass, token = nil) ⇒ Cipher 



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# File 'lib/nexus/cipher.rb', line 7

def initialize(pass, token = nil)
  @token = Base64.strict_decode64(token) if token
  @token ||= OpenSSL::Random.random_bytes(32)

  iter = 20_000
  key_len = 32
  @key = OpenSSL::PKCS5.pbkdf2_hmac_sha1(pass,
                                         @token,
                                         iter,
                                         key_len)
end

Instance Method Details

#decrypt(data) ⇒ Object 



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# File 'lib/nexus/cipher.rb', line 45

def decrypt(data)
  c = cipher
  c.decrypt
  c.key = @key
  c.iv = @iv
  c.update(Base64.strict_decode64(data)) + c.final
end

#encrypt(data) ⇒ Object 



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# File 'lib/nexus/cipher.rb', line 37

def encrypt(data)
  c = cipher
  c.encrypt
  c.key = @key
  @iv = c.random_iv
  Base64.strict_encode64(c.update(data) + c.final)
end

#iv ⇒ Object 



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# File 'lib/nexus/cipher.rb', line 29

def iv
  Base64.strict_encode64(@iv) if @iv
end

#iv=(iv) ⇒ Object 



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# File 'lib/nexus/cipher.rb', line 33

def iv=(iv)
  @iv = Base64.strict_decode64(iv)
end

#token ⇒ Object 



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# File 'lib/nexus/cipher.rb', line 25

def token
  Base64.strict_encode64(@token)
end