annotate mod_tls_policy/README.markdown @ 4268:871d140d61bb

mod_adhoc_oauth2_client: Fix including final client_id in result form The client_id is composed of the details needed for retrieving the data, making it redundant to include in the data, albeit somewhat convenient sometimes. Decided to remove it anyways, but forgot to change the result.
author Kim Alvefur <zash@zash.se>
date Sun, 22 Nov 2020 17:00:26 +0100
parents ad24f8993385
children
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1 ---
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2 summary: Cipher policy enforcement with application level error reporting
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3 ...
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5 # Introduction
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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.
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14 # Configuration
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16 First, download and add the module to `module_enabled`. Then you can
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17 decide on what policy you want to have.
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19 Requiring ciphers with forward secrecy is the most simple to set up.
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21 ``` lua
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22 tls_policy = "FS" -- allow only ciphers that enable forward secrecy
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23 ```
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25 A more complicated example:
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27 ``` lua
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28 tls_policy = {
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29 c2s = {
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30 encryption = "AES"; -- Require AES (or AESGCM) encryption
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31 protocol = "TLSv1.2"; -- and TLSv1.2
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32 bits = 128; -- and at least 128 bits (FIXME: remember what this meant)
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33 }
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34 s2s = {
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35 cipher = "AESGCM"; -- Require AESGCM ciphers
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36 protocol = "TLSv1.[12]"; -- and TLSv1.1 or 1.2
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37 authentication = "RSA"; -- with RSA authentication
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38 };
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39 }
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40 ```
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41
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42 # Compatibility
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44 Requires LuaSec 0.5
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