class Travis::Client::Repository::Key

def ==(other)
  other.to_s == self
end

def encrypt(value)
  encrypted = to_rsa.public_encrypt(value)
  Base64.encode64(encrypted).gsub(/\s+/, "")
end

def initialize(data)
  @to_s = data
end

def sized_bytes(value)
  bytes = to_byte_array(value.to_i)
  [bytes.size, *bytes].pack('NC*')
end

def to_byte_array(num, *significant)
  return significant if num.between?(-1, 0) and significant[0][7] == num[7]
  to_byte_array(*num.divmod(256)) + significant
end

def to_rsa
  @to_rsa ||= OpenSSL::PKey::RSA.new(to_s)
rescue OpenSSL::PKey::RSAError
  public_key = to_s.gsub('RSA PUBLIC KEY', 'PUBLIC KEY')
  @to_rsa = OpenSSL::PKey::RSA.new(public_key)
end

def to_ssh
  ['ssh-rsa ', "\0\0\0\assh-rsa#{sized_bytes(to_rsa.e)}#{sized_bytes(to_rsa.n)}"].pack('a*m').gsub("\n", '')
end