Mercurial > prosody-modules
view mod_warn_legacy_tls/README.markdown @ 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 | 5073bbd86970 |
children |
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TLS 1.0 and TLS 1.1 are about to be obsolete. This module warns clients if they are using those versions, to prepare for disabling them. # Configuration ``` {.lua} modules_enabled = { -- other modules etc "warn_legacy_tls"; } -- This is the default, you can leave it out if you don't wish to -- customise or translate the message sent. -- '%s' will be replaced with the TLS version in use. legacy_tls_warning = [[ Your connection is encrypted using the %s protocol, which has been demonstrated to be insecure and will be disabled soon. Please upgrade your client. ]] ``` ## Options `legacy_tls_warning` : A string. The text of the message sent to clients that use outdated TLS versions. Default as in the above example. `legacy_tls_versions` : Set of TLS versions, defaults to `{ "SSLv3", "TLSv1", "TLSv1.1" }`{.lua}, i.e. TLS \< 1.2.