lib/fernet/generator.rb
#encoding UTF-8
require 'base64'
require 'openssl'
require 'date'
module Fernet
# Internal: Generates Fernet tokens
class Generator
# Internal: Returns the token's message
attr_accessor :message
# Internal: Initializes a generator
#
# opts - a hash containing the following keys:
# * secret - a string containing a secret, optionally Base64 encoded
# * message - the message
def initialize(opts)
@secret = opts.fetch(:secret)
@message = opts[:message]
@iv = opts[:iv]
@now = opts[:now]
end
# Internal: generates a secret token
#
# Yields itself, useful for setting or overriding the message
#
# Examples
#
# generator = Generator.new(secret: some_secret)
# token = generator.generate do |g|
# g.message = 'this is my message'
# end
#
# generator = Generator.new(secret: some_secret,
# message: 'this is my message')
# token = generator.generate
#
# Returns the token as a string
def generate
yield self if block_given?
token = Token.generate(secret: @secret,
message: @message,
iv: @iv,
now: @now)
token.to_s
end
# Public: string representation of this generator, masks secret to avoid
# leaks
def inspect
"#<Fernet::Generator @secret=[masked] @message=#{@message.inspect}>"
end
alias to_s inspect
# Deprecated: used to set the message
def data=(message)
puts "[WARNING] 'data=' is deprecated, use 'message=' instead"
@message = message
end
end
end