Mercurial > prosody-modules
annotate mod_compact_resource/mod_compact_resource.lua @ 4651:8231774f5bfd
mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8
The `body:sub()` call risks splitting the string in the middle of a
multi-byte UTF-8 sequence. This should have been caught by util.stanza
validation, but that would have caused some havoc, at the very least causing
the notification to not be sent.
There have been no reports of this happening. Likely because this module
isn't widely deployed among users with languages that use many longer UTF-8
sequences.
The util.encodings.utf8.valid() function is O(n) where only the last
sequence really needs to be checked, but it's in C and expected to be fast.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 22 Aug 2021 13:22:59 +0200 |
parents | 6f34e51a23f0 |
children |
rev | line source |
---|---|
1761
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
1 |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
2 local base64_encode = require"util.encodings".base64.encode; |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
3 local random_bytes = require"util.random".bytes; |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
4 |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
5 local b64url = { ["+"] = "-", ["/"] = "_", ["="] = "" }; |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
6 local function random_resource() |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
7 return base64_encode(random_bytes(8)):gsub("[+/=]", b64url); |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
8 end |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
9 |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
10 module:hook("pre-resource-bind", function (event) |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
11 event.resource = random_resource(); |
6f34e51a23f0
mod_compact_resource: Enforces short random resources
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
12 end); |