dynatrace-cordova-outsystems-plugin/node_modules/aws-sign2/index.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

/*!
 *  Copyright 2010 LearnBoost <dev@learnboost.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Module dependencies.
 */

var crypto = require('crypto')
  , parse = require('url').parse
  ;

/**
 * Valid keys.
 */

var keys = 
  [ 'acl'
  , 'location'
  , 'logging'
  , 'notification'
  , 'partNumber'
  , 'policy'
  , 'requestPayment'
  , 'torrent'
  , 'uploadId'
  , 'uploads'
  , 'versionId'
  , 'versioning'
  , 'versions'
  , 'website'
  ]

/**
 * Return an "Authorization" header value with the given `options`
 * in the form of "AWS <key>:<signature>"
 *
 * @param {Object} options
 * @return {String}
 * @api private
 */

function authorization (options) {
  return 'AWS ' + options.key + ':' + sign(options)
}

module.exports = authorization
module.exports.authorization = authorization

/**
 * Simple HMAC-SHA1 Wrapper
 *
 * @param {Object} options
 * @return {String}
 * @api private
 */ 

function hmacSha1 (options) {
  return crypto.createHmac('sha1', options.secret).update(options.message).digest('base64')
}

module.exports.hmacSha1 = hmacSha1

/**
 * Create a base64 sha1 HMAC for `options`. 
 * 
 * @param {Object} options
 * @return {String}
 * @api private
 */

function sign (options) {
  options.message = stringToSign(options)
  return hmacSha1(options)
}
module.exports.sign = sign

/**
 * Create a base64 sha1 HMAC for `options`. 
 *
 * Specifically to be used with S3 presigned URLs
 * 
 * @param {Object} options
 * @return {String}
 * @api private
 */

function signQuery (options) {
  options.message = queryStringToSign(options)
  return hmacSha1(options)
}
module.exports.signQuery= signQuery

/**
 * Return a string for sign() with the given `options`.
 *
 * Spec:
 * 
 *    <verb>\n
 *    <md5>\n
 *    <content-type>\n
 *    <date>\n
 *    [headers\n]
 *    <resource>
 *
 * @param {Object} options
 * @return {String}
 * @api private
 */

function stringToSign (options) {
  var headers = options.amazonHeaders || ''
  if (headers) headers += '\n'
  var r = 
    [ options.verb
    , options.md5
    , options.contentType
    , options.date ? options.date.toUTCString() : ''
    , headers + options.resource
    ]
  return r.join('\n')
}
module.exports.stringToSign = stringToSign

/**
 * Return a string for sign() with the given `options`, but is meant exclusively
 * for S3 presigned URLs
 *
 * Spec:
 * 
 *    <date>\n
 *    <resource>
 *
 * @param {Object} options
 * @return {String}
 * @api private
 */

function queryStringToSign (options){
  return 'GET\n\n\n' + options.date + '\n' + options.resource
}
module.exports.queryStringToSign = queryStringToSign

/**
 * Perform the following:
 *
 *  - ignore non-amazon headers
 *  - lowercase fields
 *  - sort lexicographically
 *  - trim whitespace between ":"
 *  - join with newline
 *
 * @param {Object} headers
 * @return {String}
 * @api private
 */

function canonicalizeHeaders (headers) {
  var buf = []
    , fields = Object.keys(headers)
    ;
  for (var i = 0, len = fields.length; i < len; ++i) {
    var field = fields[i]
      , val = headers[field]
      , field = field.toLowerCase()
      ;
    if (0 !== field.indexOf('x-amz')) continue
    buf.push(field + ':' + val)
  }
  return buf.sort().join('\n')
}
module.exports.canonicalizeHeaders = canonicalizeHeaders

/**
 * Perform the following:
 *
 *  - ignore non sub-resources
 *  - sort lexicographically
 *
 * @param {String} resource
 * @return {String}
 * @api private
 */

function canonicalizeResource (resource) {
  var url = parse(resource, true)
    , path = url.pathname
    , buf = []
    ;

  Object.keys(url.query).forEach(function(key){
    if (!~keys.indexOf(key)) return
    var val = '' == url.query[key] ? '' : '=' + encodeURIComponent(url.query[key])
    buf.push(key + val)
  })

  return path + (buf.length ? '?' + buf.sort().join('&') : '')
}
module.exports.canonicalizeResource = canonicalizeResource