libs/luci-lib-px5g/lua/px5g/util.lua

   1 --[[
   2  * px5g - Embedded x509 key and certificate generator based on PolarSSL
   3  *
   4  *   Copyright (C) 2009 Steven Barth <steven@midlink.org>
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Lesser General Public
   8  *  License, version 2.1 as published by the Free Software Foundation.
   9 ]]--
  10
  11 local nixio = require "nixio"
  12 local table = require "table"
  13
  14 module "px5g.util"
  15
  16 local preamble = {
  17         key = "-----BEGIN RSA PRIVATE KEY-----",
  18         cert = "-----BEGIN CERTIFICATE-----",
  19         request = "-----BEGIN CERTIFICATE REQUEST-----"
  20 }
  21
  22 local postamble = {
  23         key = "-----END RSA PRIVATE KEY-----",
  24         cert = "-----END CERTIFICATE-----",
  25         request = "-----END CERTIFICATE REQUEST-----"
  26 }
  27
  28 function der2pem(data, type)
  29         local b64 = nixio.bin.b64encode(data)
  30
  31         local outdata = {preamble[type]}
  32         for i = 1, #b64, 64 do
  33                 outdata[#outdata + 1] = b64:sub(i, i + 63)
  34         end
  35         outdata[#outdata + 1] = postamble[type]
  36         outdata[#outdata + 1] = ""
  37
  38         return table.concat(outdata, "\n")
  39 end
  40
  41 function pem2der(data)
  42         local b64 = data:gsub({["\n"] = "", ["%-%-%-%-%-.-%-%-%-%-%-"] = ""})
  43         return nixio.bin.b64decode(b64)
  44 end