Mercurial > prosody-modules
annotate mod_tls_policy/README.markdown @ 5173:460f78654864
mod_muc_rtbl: also filter messages
This was a bit tricky because we don't want to run the JIDs
through SHA256 on each message. Took a while to come up with this
simple plan of just caching the SHA256 of the JIDs on the
occupants.
This will leave some dirt in the occupants after unloading the
module, but that should be ok; once they cycle the room, the
hashes will be gone.
This is direly needed, otherwise, there is a tight race between
the moderation activities and the actors joining the room.
| author | Jonas Schäfer <jonas@wielicki.name> |
|---|---|
| date | Tue, 21 Feb 2023 21:37:27 +0100 |
| parents | ad24f8993385 |
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| rev | line source |
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1 --- |
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2 summary: Cipher policy enforcement with application level error reporting |
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3 ... |
| 1842 | 4 |
| 5 # Introduction | |
| 6 | |
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7 This module arose from discussions at the XMPP Summit about enforcing |
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8 better ciphers in TLS. It may seem attractive to disallow some insecure |
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9 ciphers or require forward secrecy, but doing this at the TLS level |
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10 would the user with an unhelpful "Encryption failed" message. This |
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11 module does this enforcing at the application level, allowing better |
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12 error messages. |
| 1842 | 13 |
| 14 # Configuration | |
| 15 | |
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16 First, download and add the module to `module_enabled`. Then you can |
| 1842 | 17 decide on what policy you want to have. |
| 18 | |
| 19 Requiring ciphers with forward secrecy is the most simple to set up. | |
| 20 | |
| 21 ``` lua | |
| 22 tls_policy = "FS" -- allow only ciphers that enable forward secrecy | |
| 23 ``` | |
| 24 | |
| 25 A more complicated example: | |
| 26 | |
| 27 ``` lua | |
| 28 tls_policy = { | |
| 29 c2s = { | |
| 30 encryption = "AES"; -- Require AES (or AESGCM) encryption | |
| 31 protocol = "TLSv1.2"; -- and TLSv1.2 | |
| 32 bits = 128; -- and at least 128 bits (FIXME: remember what this meant) | |
| 33 } | |
| 34 s2s = { | |
| 35 cipher = "AESGCM"; -- Require AESGCM ciphers | |
| 36 protocol = "TLSv1.[12]"; -- and TLSv1.1 or 1.2 | |
| 37 authentication = "RSA"; -- with RSA authentication | |
| 38 }; | |
| 39 } | |
| 40 ``` | |
| 41 | |
| 42 # Compatibility | |
| 43 | |
| 44 Requires LuaSec 0.5 | |
| 45 |