mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-07 20:31:06 -05:00
7dcc807caf
Check generated read-tokens against v1 GitOrigin-RevId: 15749a41a295c0401b0a39968f2c3657f8abebb8
66 lines
2.2 KiB
CoffeeScript
66 lines
2.2 KiB
CoffeeScript
crypto = require 'crypto'
|
|
V1Api = require('../V1/V1Api')
|
|
Async = require('async')
|
|
logger = require('logger-sharelatex')
|
|
|
|
|
|
# This module mirrors the token generation in Overleaf (`random_token.rb`),
|
|
# for the purposes of implementing token-based project access, like the
|
|
# 'unlisted-projects' feature in Overleaf
|
|
|
|
module.exports = ProjectTokenGenerator =
|
|
|
|
# (From Overleaf `random_token.rb`)
|
|
# Letters (not numbers! see generate_token) used in tokens. They're all
|
|
# consonants, to avoid embarassing words (I can't think of any that use only
|
|
# a y), and lower case "l" is omitted, because in many fonts it is
|
|
# indistinguishable from an upper case "I" (and sometimes even the number 1).
|
|
TOKEN_ALPHA: 'bcdfghjkmnpqrstvwxyz'
|
|
TOKEN_NUMERICS: '123456789'
|
|
|
|
_randomString: (length, alphabet) ->
|
|
result = crypto.randomBytes(length).toJSON().data.map(
|
|
(b) -> alphabet[b % alphabet.length]
|
|
).join('')
|
|
return result
|
|
|
|
# Generate a 12-char token with only characters from TOKEN_ALPHA,
|
|
# suitable for use as a read-only token for a project
|
|
readOnlyToken: () ->
|
|
return ProjectTokenGenerator._randomString(
|
|
12,
|
|
ProjectTokenGenerator.TOKEN_ALPHA
|
|
)
|
|
|
|
# Generate a longer token, with a numeric prefix,
|
|
# suitable for use as a read-and-write token for a project
|
|
readAndWriteToken: () ->
|
|
numerics = ProjectTokenGenerator._randomString(
|
|
10,
|
|
ProjectTokenGenerator.TOKEN_NUMERICS
|
|
)
|
|
token = ProjectTokenGenerator._randomString(
|
|
12,
|
|
ProjectTokenGenerator.TOKEN_ALPHA
|
|
)
|
|
fullToken = "#{numerics}#{token}"
|
|
return fullToken
|
|
|
|
generateUniqueReadOnlyToken: (callback=(err, token)->) ->
|
|
Async.retry 10
|
|
, (cb) ->
|
|
token = ProjectTokenGenerator.readOnlyToken()
|
|
logger.log {token}, "Generated read-only token"
|
|
V1Api.request {
|
|
url: "/api/v1/sharelatex/docs/read_token/#{token}/exists",
|
|
json: true
|
|
}, (err, response, body) ->
|
|
return cb(err) if err?
|
|
if response.statusCode != 200
|
|
return cb(new Error("non-200 response from v1 read-token-exists api: #{response.statusCode}"))
|
|
if body.exists == true
|
|
cb(new Error("token already exists in v1: #{token}"))
|
|
else
|
|
logger.log {token}, "Read-only token does not exist in v1, good to use"
|
|
cb(null, token)
|
|
, callback
|