git ssb

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var chloride = require('chloride')
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function box (data, key) {
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  if(!data) return
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  var b = new Buffer(JSON.stringify(data))
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  return chloride.crypto_secretbox_easy(b, key.slice(0, 24), key).toString('base64')
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}
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function unbox (ctxt, key) {
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  var b = new Buffer(ctxt, 'base64')
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  var ptxt = chloride.crypto_secretbox_open_easy(b, key.slice(0, 24), key)
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  if(!ptxt) return
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  try {
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    return JSON.parse(ptxt)
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  } catch(err) {
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    console.error(err)
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  }
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}
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function hash(s) {
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  return chloride.crypto_hash_sha256(
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    'string' == typeof s ? new Buffer(s, 'utf8') : s
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  )
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}
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exports.hash = hash
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exports.box = box
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exports.unbox = unbox
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exports.parse = function (str) {
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  if(!/^inv\:/.test(str)) throw new Error('invites must start with "inv:", got '+JSON.stringify(str))
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  var ary = str.substring(4).split(',')
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  return {
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    seed: ary[0],
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    invite: ary[1],
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    cap: ary[2],
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    pubs: ary.slice(3)
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  }
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}
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exports.stringify = function (invite) {
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  return 'inv:'+[
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      invite.seed,
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      invite.invite,
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      invite.cap || ''
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    ]
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    .concat(invite.pubs)
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    .join(',')
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}
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