InGen Hatchery cryptographic services

  GET  /ecb?prefix=<base64>   hex( AES-ECB(prefix || SECRET) )   [Amber Blocks]
  GET  /padding/token         base64( IV || AES-CBC(vault) )     [Cracked Shell]
  POST /padding  body=base64(IV||C)   -> "valid" (200) or "invalid padding" (400)