source: trip-planner-front/node_modules/aws-sign2/index.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1
2/*!
3 * Copyright 2010 LearnBoost <dev@learnboost.com>
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18/**
19 * Module dependencies.
20 */
21
22var crypto = require('crypto')
23 , parse = require('url').parse
24 ;
25
26/**
27 * Valid keys.
28 */
29
30var keys =
31 [ 'acl'
32 , 'location'
33 , 'logging'
34 , 'notification'
35 , 'partNumber'
36 , 'policy'
37 , 'requestPayment'
38 , 'torrent'
39 , 'uploadId'
40 , 'uploads'
41 , 'versionId'
42 , 'versioning'
43 , 'versions'
44 , 'website'
45 ]
46
47/**
48 * Return an "Authorization" header value with the given `options`
49 * in the form of "AWS <key>:<signature>"
50 *
51 * @param {Object} options
52 * @return {String}
53 * @api private
54 */
55
56function authorization (options) {
57 return 'AWS ' + options.key + ':' + sign(options)
58}
59
60module.exports = authorization
61module.exports.authorization = authorization
62
63/**
64 * Simple HMAC-SHA1 Wrapper
65 *
66 * @param {Object} options
67 * @return {String}
68 * @api private
69 */
70
71function hmacSha1 (options) {
72 return crypto.createHmac('sha1', options.secret).update(options.message).digest('base64')
73}
74
75module.exports.hmacSha1 = hmacSha1
76
77/**
78 * Create a base64 sha1 HMAC for `options`.
79 *
80 * @param {Object} options
81 * @return {String}
82 * @api private
83 */
84
85function sign (options) {
86 options.message = stringToSign(options)
87 return hmacSha1(options)
88}
89module.exports.sign = sign
90
91/**
92 * Create a base64 sha1 HMAC for `options`.
93 *
94 * Specifically to be used with S3 presigned URLs
95 *
96 * @param {Object} options
97 * @return {String}
98 * @api private
99 */
100
101function signQuery (options) {
102 options.message = queryStringToSign(options)
103 return hmacSha1(options)
104}
105module.exports.signQuery= signQuery
106
107/**
108 * Return a string for sign() with the given `options`.
109 *
110 * Spec:
111 *
112 * <verb>\n
113 * <md5>\n
114 * <content-type>\n
115 * <date>\n
116 * [headers\n]
117 * <resource>
118 *
119 * @param {Object} options
120 * @return {String}
121 * @api private
122 */
123
124function stringToSign (options) {
125 var headers = options.amazonHeaders || ''
126 if (headers) headers += '\n'
127 var r =
128 [ options.verb
129 , options.md5
130 , options.contentType
131 , options.date ? options.date.toUTCString() : ''
132 , headers + options.resource
133 ]
134 return r.join('\n')
135}
136module.exports.stringToSign = stringToSign
137
138/**
139 * Return a string for sign() with the given `options`, but is meant exclusively
140 * for S3 presigned URLs
141 *
142 * Spec:
143 *
144 * <date>\n
145 * <resource>
146 *
147 * @param {Object} options
148 * @return {String}
149 * @api private
150 */
151
152function queryStringToSign (options){
153 return 'GET\n\n\n' + options.date + '\n' + options.resource
154}
155module.exports.queryStringToSign = queryStringToSign
156
157/**
158 * Perform the following:
159 *
160 * - ignore non-amazon headers
161 * - lowercase fields
162 * - sort lexicographically
163 * - trim whitespace between ":"
164 * - join with newline
165 *
166 * @param {Object} headers
167 * @return {String}
168 * @api private
169 */
170
171function canonicalizeHeaders (headers) {
172 var buf = []
173 , fields = Object.keys(headers)
174 ;
175 for (var i = 0, len = fields.length; i < len; ++i) {
176 var field = fields[i]
177 , val = headers[field]
178 , field = field.toLowerCase()
179 ;
180 if (0 !== field.indexOf('x-amz')) continue
181 buf.push(field + ':' + val)
182 }
183 return buf.sort().join('\n')
184}
185module.exports.canonicalizeHeaders = canonicalizeHeaders
186
187/**
188 * Perform the following:
189 *
190 * - ignore non sub-resources
191 * - sort lexicographically
192 *
193 * @param {String} resource
194 * @return {String}
195 * @api private
196 */
197
198function canonicalizeResource (resource) {
199 var url = parse(resource, true)
200 , path = url.pathname
201 , buf = []
202 ;
203
204 Object.keys(url.query).forEach(function(key){
205 if (!~keys.indexOf(key)) return
206 var val = '' == url.query[key] ? '' : '=' + encodeURIComponent(url.query[key])
207 buf.push(key + val)
208 })
209
210 return path + (buf.length ? '?' + buf.sort().join('&') : '')
211}
212module.exports.canonicalizeResource = canonicalizeResource
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