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Versions: 9
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Contents
require 'base64'
require_relative 'configuration'
module Shhh
# {Shhh::CipherHandler} contains cipher-related utilities necessary to create
# ciphers, and seed them with the salt or iV vector. It also defines the
# internal structure {Shhh::CipherHandler::CipherStruct} which is a key
# struct used in constructing cipher and saving it with the data packet.
module CipherHandler
CREATE_CIPHER = ->(name) { ::OpenSSL::Cipher.new(name) }
CipherStruct = Struct.new(:cipher, :iv, :salt)
def create_cipher(direction:,
cipher_name:,
iv: nil,
salt: nil)
cipher = new_cipher(cipher_name)
cipher.send(direction)
iv ||= cipher.random_iv
cipher.iv = iv
CipherStruct.new(cipher, iv, salt)
end
def new_cipher(cipher_name)
CREATE_CIPHER.call(cipher_name)
end
def update_cipher(cipher, value)
data = cipher.update(value)
data << cipher.final
data
end
module ClassMethods
def create_private_key
key = CREATE_CIPHER.call(Shhh::Configuration.property(:private_key_cipher)).random_key
::Base64.urlsafe_encode64(key)
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems