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exports*/\nvar SignStream = require('./lib/sign-stream');\nvar VerifyStream = require('./lib/verify-stream');\n\nvar ALGORITHMS = [\n  'HS256', 'HS384', 'HS512',\n  'RS256', 'RS384', 'RS512',\n  'PS256', 'PS384', 'PS512',\n  'ES256', 'ES384', 'ES512'\n];\n\nexports.ALGORITHMS = ALGORITHMS;\nexports.sign = SignStream.sign;\nexports.verify = VerifyStream.verify;\nexports.decode = VerifyStream.decode;\nexports.isValid = VerifyStream.isValid;\nexports.createSign = function createSign(opts) {\n  return new SignStream(opts);\n};\nexports.createVerify = function createVerify(opts) {\n  return new VerifyStream(opts);\n};\n","/*global module, process*/\nvar Buffer = require('safe-buffer').Buffer;\nvar Stream = require('stream');\nvar util = require('util');\n\nfunction DataStream(data) {\n  this.buffer = null;\n  this.writable = true;\n  this.readable = true;\n\n  // No input\n  if (!data) {\n    this.buffer = Buffer.alloc(0);\n    return this;\n  }\n\n  // Stream\n  if (typeof data.pipe === 'function') {\n    this.buffer = Buffer.alloc(0);\n    data.pipe(this);\n    return this;\n  }\n\n  // Buffer or String\n  // or Object (assumedly a passworded key)\n  if (data.length || typeof data === 'object') {\n    this.buffer = data;\n    this.writable = false;\n    process.nextTick(function () {\n      this.emit('end', data);\n      this.readable = false;\n      this.emit('close');\n    }.bind(this));\n    return this;\n  }\n\n  throw new TypeError('Unexpected data type ('+ typeof data + ')');\n}\nutil.inherits(DataStream, Stream);\n\nDataStream.prototype.write = function write(data) {\n  this.buffer = Buffer.concat([this.buffer, Buffer.from(data)]);\n  this.emit('data', data);\n};\n\nDataStream.prototype.end = function end(data) {\n  if (data)\n    this.write(data);\n  this.emit('end', data);\n  this.emit('close');\n  this.writable = false;\n  this.readable = false;\n};\n\nmodule.exports = DataStream;\n","/*global module*/\nvar Buffer = require('buffer').Buffer;\n\nmodule.exports = function toString(obj) {\n  if (typeof obj === 'string')\n    return obj;\n  if (typeof obj === 'number' || Buffer.isBuffer(obj))\n    return obj.toString();\n  return JSON.stringify(obj);\n};\n","/*global module*/\nvar Buffer = require('safe-buffer').Buffer;\nvar DataStream = require('./data-stream');\nvar jwa = require('jwa');\nvar Stream = require('stream');\nvar toString = require('./tostring');\nvar util = require('util');\n\nfunction base64url(string, encoding) {\n  return Buffer\n    .from(string, encoding)\n    .toString('base64')\n    .replace(/=/g, '')\n    .replace(/\\+/g, '-')\n    .replace(/\\//g, '_');\n}\n\nfunction jwsSecuredInput(header, payload, encoding) {\n  encoding = encoding || 'utf8';\n  var encodedHeader = base64url(toString(header), 'binary');\n  var encodedPayload = base64url(toString(payload), encoding);\n  return util.format('%s.%s', encodedHeader, encodedPayload);\n}\n\nfunction jwsSign(opts) {\n  var header = opts.header;\n  var payload = opts.payload;\n  var secretOrKey = opts.secret || opts.privateKey;\n  var encoding = opts.encoding;\n  var algo = jwa(header.alg);\n  var securedInput = jwsSecuredInput(header, payload, encoding);\n  var signature = algo.sign(securedInput, secretOrKey);\n  return util.format('%s.%s', securedInput, signature);\n}\n\nfunction SignStream(opts) {\n  var secret = opts.secret||opts.privateKey||opts.key;\n  var secretStream = new DataStream(secret);\n  this.readable = true;\n  this.header = opts.header;\n  this.encoding = opts.encoding;\n  this.secret = this.privateKey = this.key = secretStream;\n  this.payload = new DataStream(opts.payload);\n  this.secret.once('close', function () {\n    if (!this.payload.writable && this.readable)\n      this.sign();\n  }.bind(this));\n\n  this.payload.once('close', function () {\n    if (!this.secret.writable && this.readable)\n      this.sign();\n  }.bind(this));\n}\nutil.inherits(SignStream, Stream);\n\nSignStream.prototype.sign = function sign() {\n  try {\n    var signature = jwsSign({\n      header: this.header,\n      payload: this.payload.buffer,\n      secret: this.secret.buffer,\n      encoding: this.encoding\n    });\n    this.emit('done', signature);\n    this.emit('data', signature);\n    this.emit('end');\n    this.readable = false;\n    return signature;\n  } catch (e) {\n    this.readable = false;\n    this.emit('error', e);\n    this.emit('close');\n  }\n};\n\nSignStream.sign = jwsSign;\n\nmodule.exports = SignStream;\n","/*global module*/\nvar Buffer = require('safe-buffer').Buffer;\nvar DataStream = require('./data-stream');\nvar jwa = require('jwa');\nvar Stream = require('stream');\nvar toString = require('./tostring');\nvar util = require('util');\nvar JWS_REGEX = /^[a-zA-Z0-9\\-_]+?\\.[a-zA-Z0-9\\-_]+?\\.([a-zA-Z0-9\\-_]+)?$/;\n\nfunction isObject(thing) {\n  return Object.prototype.toString.call(thing) === '[object Object]';\n}\n\nfunction safeJsonParse(thing) {\n  if (isObject(thing))\n    return thing;\n  try { return JSON.parse(thing); }\n  catch (e) { return undefined; }\n}\n\nfunction headerFromJWS(jwsSig) {\n  var encodedHeader = jwsSig.split('.', 1)[0];\n  return safeJsonParse(Buffer.from(encodedHeader, 'base64').toString('binary'));\n}\n\nfunction securedInputFromJWS(jwsSig) {\n  return jwsSig.split('.', 2).join('.');\n}\n\nfunction signatureFromJWS(jwsSig) {\n  return jwsSig.split('.')[2];\n}\n\nfunction payloadFromJWS(jwsSig, encoding) {\n  encoding = encoding || 'utf8';\n  var payload = jwsSig.split('.')[1];\n  return Buffer.from(payload, 'base64').toString(encoding);\n}\n\nfunction isValidJws(string) {\n  return JWS_REGEX.test(string) && !!headerFromJWS(string);\n}\n\nfunction jwsVerify(jwsSig, algorithm, secretOrKey) {\n  if (!algorithm) {\n    var err = new Error(\"Missing algorithm parameter for jws.verify\");\n    err.code = \"MISSING_ALGORITHM\";\n    throw err;\n  }\n  jwsSig = toString(jwsSig);\n  var signature = signatureFromJWS(jwsSig);\n  var securedInput = securedInputFromJWS(jwsSig);\n  var algo = jwa(algorithm);\n  return algo.verify(securedInput, signature, secretOrKey);\n}\n\nfunction jwsDecode(jwsSig, opts) {\n  opts = opts || {};\n  jwsSig = toString(jwsSig);\n\n  if (!isValidJws(jwsSig))\n    return null;\n\n  var header = headerFromJWS(jwsSig);\n\n  if (!header)\n    return null;\n\n  var payload = payloadFromJWS(jwsSig);\n  if (header.typ === 'JWT' || opts.json)\n    payload = JSON.parse(payload, opts.encoding);\n\n  return {\n    header: header,\n    payload: payload,\n    signature: signatureFromJWS(jwsSig)\n  };\n}\n\nfunction VerifyStream(opts) {\n  opts = opts || {};\n  var secretOrKey = opts.secret||opts.publicKey||opts.key;\n  var secretStream = new DataStream(secretOrKey);\n  this.readable = true;\n  this.algorithm = opts.algorithm;\n  this.encoding = opts.encoding;\n  this.secret = this.publicKey = this.key = secretStream;\n  this.signature = new DataStream(opts.signature);\n  this.secret.once('close', function () {\n    if (!this.signature.writable && this.readable)\n      this.verify();\n  }.bind(this));\n\n  this.signature.once('close', function () {\n    if (!this.secret.writable && this.readable)\n      this.verify();\n  }.bind(this));\n}\nutil.inherits(VerifyStream, Stream);\nVerifyStream.prototype.verify = function verify() {\n  try {\n    var valid = jwsVerify(this.signature.buffer, this.algorithm, this.key.buffer);\n    var obj = jwsDecode(this.signature.buffer, this.encoding);\n    this.emit('done', valid, obj);\n    this.emit('data', valid);\n    this.emit('end');\n    this.readable = false;\n    return valid;\n  } catch (e) {\n    this.readable = false;\n    this.emit('error', e);\n    this.emit('close');\n  }\n};\n\nVerifyStream.decode = jwsDecode;\nVerifyStream.isValid = isValidJws;\nVerifyStream.verify = jwsVerify;\n\nmodule.exports = VerifyStream;\n"],"sourceRoot":""}