-
Notifications
You must be signed in to change notification settings - Fork 10
/
index.js
341 lines (303 loc) · 10.3 KB
/
index.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
var isCanonicalBase64 = require('is-canonical-base64')
var isDomain = require('is-valid-domain')
var Querystring = require('querystring')
var ip = require('ip')
var MultiServerAddress = require('multiserver-address')
/* classic ssb definitions */
var parseLinkRegex = /^((@|%|&)[A-Za-z0-9/+]{43}=\.[\w\d]+)(\?(.+))?$/
var feedIdRegex = exports.feedIdRegex = isCanonicalBase64('@', '.(?:sha256|ed25519)', 32)
var msgIdRegex = exports.msgIdRegex = isCanonicalBase64('%', '.sha256', 32)
var blobIdRegex = exports.blobIdRegex = isCanonicalBase64('&', '.sha256', 32)
/* BFE type checks for strings */
var SUFFIX = '\\.[a-zA-Z\\d-]+'
var feedTypeIdRegex = exports.feedTypeIdRegex = isCanonicalBase64('@', SUFFIX)
var msgTypeIdRegex = exports.msgTypeIdRegex = isCanonicalBase64('%', SUFFIX)
var blobTypeIdRegex = exports.blobTypeIdRegex = isCanonicalBase64('&', SUFFIX)
var cloakedMsgIdRegex = exports.cloakedMsgIdRegex = isCanonicalBase64('%', '.cloaked', 32)
var extractRegex = /([@%&][A-Za-z0-9/+]{43}=\.[\w\d]+)/
var DEFAULT_PORT = 8008
/* basic validators */
function isString (s) { return typeof s === 'string' }
function isObject (o) { return o && typeof o === 'object' && !Array.isArray(o) }
var isInteger = Number.isInteger
function isIP (s) {
return ip.isV4Format(s) || ip.isV6Format(s)
}
function isHost (addr) {
if (!isString(addr)) return
addr = addr.replace(/^wss?:\/\//, '')
return (isIP(addr)) || isDomain(addr) || addr === 'localhost'
}
function isPort (p) {
return isInteger(p) && p <= 65536
}
function isMultiServerAddress (str) {
// a http url fits into the multiserver scheme,
// but all ssb address must have a transport and a transform
// so check there is at least one unescaped ~ in the address
return MultiServerAddress.check(str) && /[^!][~]/.test(str)
}
/* feed */
var isFeedId = exports.isFeed = exports.isFeedId =
function (data) {
return isString(data) && feedIdRegex.test(data)
}
exports.isFeedType = exports.isFeedTypeId =
function (data) {
return isString(data) && feedTypeIdRegex.test(data)
}
/* msg */
var isMsgId = exports.isMsg = exports.isMsgId =
function (data) {
return isString(data) && msgIdRegex.test(data)
}
exports.isMsgType = exports.isMsgTypeId =
function (data) {
return isString(data) && msgTypeIdRegex.test(data)
}
exports.isCloakedMsg = exports.isCloakedMsgId =
function (data) {
return isString(data) && cloakedMsgIdRegex.test(data)
}
/* blob */
var isBlobId = exports.isBlob = exports.isBlobId =
function (data) {
return isString(data) && blobIdRegex.test(data)
}
exports.isBlobType = exports.isBlobTypeId =
function (data) {
return isString(data) && blobTypeIdRegex.test(data)
}
var isLink = exports.isLink =
function (data) {
if (!isString(data)) return false
var index = data.indexOf('?')
data = ~index ? data.substring(0, index) : data
return isString(data) && (isFeedId(data) || isMsgId(data) || isBlobId(data))
}
exports.isBlobLink = function (s) {
return s[0] === '&' && isLink(s)
}
exports.isMsgLink = function (s) {
return s[0] === '%' && isLink(s)
}
exports.normalizeChannel =
function (data) {
if (typeof data === 'string') {
data = data.toLowerCase().replace(/\s|,|\.|\?|!|<|>|\(|\)|\[|\]|"|#/g, '')
if (data.length > 0) {
return data.slice(0, 30)
}
}
return null
}
function deprecate (name, fn) {
var logged = false
return function () {
var args = [].slice.call(arguments)
if (!logged) {
console.trace('deprecated api used: ' + name)
logged = true
}
return fn.apply(this, args)
}
}
var parseMultiServerAddress = function (data) {
if (!isString(data)) return false
if (!MultiServerAddress.check(data)) return false
var addr = MultiServerAddress.decode(data)
addr = addr.find(function (address) {
if (!address[0]) return false
if (!address[1]) return false
return /^(net|wss?|onion)$/.test(address[0].name) && /^shs/.test(address[1].name)
})
if (!Array.isArray(addr)) {
return false
}
var port = +addr[0].data.pop() // last item always port, to handle ipv6
// preserve protocol type on websocket addresses
var host = (/^wss?$/.test(addr[0].name) ? addr[0].name + ':' : '') + addr[0].data.join(':')
var key = '@' + addr[1].data[0] + '.ed25519'
var seed = addr[1].data[2]
// allow multiserver addresses that are not currently understood!
if (!(isHost(host) && isPort(+port) && isFeedId(key))) return false
var address = {
host: host,
port: port,
key: key
}
if (seed) { address.seed = seed }
return address
}
var toLegacyAddress = parseMultiServerAddress
exports.toLegacyAddress = deprecate('ssb-ref.toLegacyAddress', toLegacyAddress)
exports.isLegacyAddress = function (addr) {
return isObject(addr) && isHost(addr.host) && isPort(addr.port) && isFeedId(addr.key)
}
var toMultiServerAddress = exports.toMultiServerAddress = function (addr) {
if (MultiServerAddress.check(addr)) return addr
if (!isPort(addr.port)) throw new Error('ssb-ref.toMultiServerAddress - invalid port:' + addr.port)
if (!isHost(addr.host)) throw new Error('ssb-ref.toMultiServerAddress - invalid host:' + addr.host)
if (!isFeedId(addr.key)) throw new Error('ssb-ref.toMultiServerAddress - invalid key:' + addr.key)
return (
/^wss?:/.test(addr.host) ? addr.host
: /\.onion$/.test(addr.host) ? 'onion:' + addr.host
: 'net:' + addr.host
) + ':' + addr.port + '~shs:' + addr.key.substring(1, addr.key.indexOf('.'))
}
var isAddress = exports.isAddress = function (data) {
var host, port, id
if (isObject(data)) {
id = data.key; host = data.host; port = data.port
} else if (!isString(data)) return false
else if (isMultiServerAddress(data)) return true
else {
var parts = data.split(':')
id = parts.pop(); port = parts.pop(); host = parts.join(':')
}
return (
isFeedId(id) && isPort(+port) &&
isHost(host)
)
}
// This is somewhat fragile, because maybe non-shs protocols get added...
// it would be better to treat all addresses as opaque or have multiserver handle
// extraction of a signing key from the address.
exports.getKeyFromAddress = function (addr) {
if (addr.key) return addr.key
try {
var data = MultiServerAddress.decode(addr)
} catch (err) {
console.error(new Error('Attempted connection with malformed multiserver-address ' + addr))
}
if (!data) return undefined
for (var k in data) {
var address = data[k]
for (var j in address) {
var protocol = address[j]
if (/^shs/.test(protocol.name)) {
// forwards compatible with future shs versions...
return '@' + protocol.data[0] + '.ed25519'
}
}
}
}
var parseAddress = function (e) {
if (isString(e)) {
if (~e.indexOf('~')) { return parseMultiServerAddress(e) }
var parts = e.split(':')
var id = parts.pop(); var port = parts.pop(); var host = parts.join(':')
e = {
host: host,
port: +(port || DEFAULT_PORT),
key: id
}
return e
}
return e
}
exports.parseAddress = deprecate('ssb-ref.parseAddress', parseAddress)
var toAddress = exports.toAddress = function (e) {
e = parseAddress(e)
e.port = e.port || DEFAULT_PORT
e.host = e.host || 'localhost'
return e
}
var legacyInviteRegex = /^[A-Za-z0-9/+]{43}=$/
var legacyInviteFixerRegex = /#.*$/
var isLegacyInvite = exports.isLegacyInvite =
function (data) {
if (!isString(data)) return false
data = data.replace(legacyInviteFixerRegex, '')
var parts = data.split('~')
return parts.length === 2 && isAddress(parts[0]) && legacyInviteRegex.test(parts[1])
}
var isMultiServerInvite = exports.isMultiServerInvite =
function (data) {
if (!isString(data)) return false
return !!parseMultiServerInvite(data)
}
var isInvite = exports.isInvite =
function (data) {
if (!isString(data)) return false
return isLegacyInvite(data) || isMultiServerInvite(data)
}
exports.parseLink = function parseBlob (ref) {
var match = parseLinkRegex.exec(ref)
if (match && match[1]) {
if (match[3]) {
var query = Querystring.parse(match[4])
// unbox keys have a '+' in them that is parsed into a ' ', this changes it back
if (isString(query.unbox)) query.unbox = query.unbox.replace(/ /g, '+')
return { link: match[1], query }
} else {
return { link: match[1] }
}
}
}
function parseLegacyInvite (invite) {
var redirect = invite.split('#')
invite = redirect.shift()
var parts = invite.split('~')
var addr = toAddress(parts[0])// .split(':')
// convert legacy code to multiserver invite code.
var remote = toMultiServerAddress(addr)
invite = remote + ':' + parts[1]
return {
invite: remote + ':' + parts[1],
key: addr.key,
remote: remote,
redirect: redirect.length ? '#' + redirect.join('#') : null
}
}
function parseMultiServerInvite (invite) {
var redirect = invite.split('#')
if (!redirect.length) return null
invite = redirect.shift()
var addr = toLegacyAddress(invite)
if (!addr) return null
delete addr.seed
return {
invite: invite,
remote: toMultiServerAddress(addr),
key: addr.key,
redirect: redirect.length ? '#' + redirect.join('#') : null
}
}
exports.parseLegacyInvite = deprecate('ssb-ref.parseLegacyInvite', parseLegacyInvite)
exports.parseMultiServerInvite = deprecate('ssb-ref.parseMultiServerInvite', parseMultiServerInvite)
exports.parseInvite = deprecate('ssb-ref.parseInvite', function (invite) {
return (
isLegacyInvite(invite)
? parseLegacyInvite(invite)
: isMultiServerInvite(invite)
? parseMultiServerInvite(invite)
: null
)
})
exports.type =
function (id) {
if (!isString(id)) return false
var c = id.charAt(0)
if (c === '@' && isFeedId(id)) { return 'feed' } else if (c === '%' && isMsgId(id)) { return 'msg' } else if (c === '&' && isBlobId(id)) { return 'blob' } else if (isAddress(id)) return 'address'
else if (isInvite(id)) return 'invite'
else { return false }
}
exports.extract =
function (data) {
if (!isString(data)) { return false }
var _data = data
var res = extractRegex.exec(_data)
if (res) {
return res && res[0]
} else {
try {
_data = decodeURIComponent(data)
} catch (e) {
// this may fail if it's not encoded, so don't worry if it does
}
_data = _data.replace(/&/g, '&')
res = extractRegex.exec(_data)
return res && res[0]
}
}