jacobh2
7521c0188b
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B
48 lines
2.9 KiB
Plaintext
48 lines
2.9 KiB
Plaintext
# Kvitt (SPEC §10.5.2, D-120, D-126). NPM, Proxy Host <KVITT_PUBLIC_HOST>, Advanced tab, Custom Nginx Configuration.
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# App gate (SPEC §8.5, D-126): outside the home LAN only a request carrying the key built into the app passes;
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# everything else gets the connection closed (444: nothing sent, nothing to fingerprint). Put the key from
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# android/local.properties (kvitt.appKey) in place of KVITT_APP_KEY. To rotate, add a second if-line with the new key.
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# The LAN check reads $realip_remote_addr, the address that really connected: NPM replaces $remote_addr with the
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# request's own X-Real-IP header for private peers, so $remote_addr could be forged. Let's Encrypt's renewal passes.
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set $kvitt_gate 0;
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if ($http_x_kvitt_app = "KVITT_APP_KEY") { set $kvitt_gate 1; }
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if ($realip_remote_addr ~ "^192\.168\.1\.") { set $kvitt_gate 1; }
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if ($uri ~ "^/\.well-known/acme-challenge/") { set $kvitt_gate 1; }
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if ($kvitt_gate = 0) { return 444; }
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# Server body: 1 MiB, PUT /me/picture 5 MiB (SPEC §8.6); the server answers anything larger with its own 413.
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client_max_body_size 6m;
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# No long-poll in the API (SPEC §14.3); 60 s between two reads from the server.
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proxy_read_timeout 60s;
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# Response headers (D-117). They live at server level, so no location below may use add_header (nginx would then
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# drop all of these in it); NPM's HSTS line (SSL tab) sits at the same level. The server's own copy is hidden, so
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# each header appears once (the landing page sends Referrer-Policy itself).
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proxy_hide_header Content-Security-Policy;
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proxy_hide_header X-Content-Type-Options;
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proxy_hide_header X-Frame-Options;
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proxy_hide_header Referrer-Policy;
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add_header Content-Security-Policy "default-src 'none'; style-src 'unsafe-inline'; base-uri 'none'; form-action 'none'; frame-ancestors 'none'" always;
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add_header X-Content-Type-Options nosniff always;
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add_header X-Frame-Options DENY always;
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add_header Referrer-Policy no-referrer always;
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# Replaces NPM's own "location /" (NPM leaves it out when this field has one), whose add_header X-Served-By would
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# drop the headers above. $forward_scheme, $server and $port are NPM's Details tab values.
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location / {
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proxy_set_header Host $host;
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proxy_set_header X-Forwarded-Proto $scheme;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_pass $forward_scheme://$server:$port$request_uri;
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}
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# Invite links /i/<code>?from=<name>: neither the code nor the inviter's name may reach a log (SPEC §8.7). NPM's
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# access log format writes the whole $request_uri, query string included, so this path is not logged at all, and
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# its error log (which would carry the request line on a 502) goes nowhere.
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location ^~ /i/ {
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access_log off;
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error_log /dev/null crit;
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proxy_set_header Host $host;
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proxy_set_header X-Forwarded-Proto $scheme;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_pass $forward_scheme://$server:$port$request_uri;
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}
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