class Epithet::Config

Class for passing around preset configs. See Epithet::configure for options.

Public Class Methods

Source

# File lib/epithet.rb, line 158
def initialize(opts = {})
  opts = opts.dup
  @separator = String(opts.delete(:separator) { '_' })
  @salt = String(opts.delete(:salt))
  @cipher = opts.delete(:cipher) || 'aes-256-ecb'
  @digest = opts.delete(:digest) || 'sha256'

  cipher = OpenSSL::Cipher.new(@cipher)
  raise ArgumentError, "#{@cipher} not a 128-bit block cipher" if cipher.block_size != 16
  raise ArgumentError, "#{@cipher} requires an IV/nonce" if cipher.iv_len != 0
  raise ArgumentError, "#{@digest} produces < 64-bit digest" if OpenSSL::Digest.new(@digest).digest_length < 8

  @keygen = opts.delete(:keygen) || Keygen.new(
    passphrase: opts.delete(:passphrase),
    digest: @digest,
    scrypt: opts.delete(:scrypt) || Keygen::DEFAULT_SCRYPT_PARAMS)
  raise ArgumentError, "unused option(s) #{opts.keys}" unless opts.empty?
end