annotate mod_tls_policy/README.markdown @ 5406:b86d80e21c60

mod_http_oauth2: Validate consistency of response and grant types Ensure that these correlated fields make sense per RFC 7591 ยง 2.1, even though we currently only check the response type during authorization. This could probably all be deleted if (when!) we remove the implicit grant, since then these things don't make any sense anymore.
author Kim Alvefur <zash@zash.se>
date Tue, 02 May 2023 16:34:31 +0200
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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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