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nginx: add some rate limiting and improve error handling

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This commit is contained in:
Vincent Breitmoser
2019-07-11 22:59:18 +02:00
parent 3b596d4955
commit 5248b1d0b9
8 changed files with 84 additions and 37 deletions
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92
hagrid-routes.conf
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@@ -28,19 +28,11 @@ location /vks/v1/request-verify {
}
location /vks/v1/ {
location ~ ^/vks/v1/by-email/([^/][^/])([^/][^/])([^/]*)$ {
add_header 'Access-Control-Allow-Origin' '*';
# we have some trouble with uri encoding here. just route through
# hagrid, for now.
proxy_pass http://127.0.0.1:8080;
# error_page 404 /errors/404-by-email.htm;
# default_type application/pgp-keys;
# add_header Content-Disposition 'attachment; filename="$1$2$3.asc"';
# try_files /keys/links/by-email/$1/$2/$3 =404;
}
location ~ ^/vks/v1/by-fingerprint/(?:0x)?([^/][^/])([^/][^/])(..*)$ {
error_page 404 /errors/404-by-fpr.htm;
limit_req zone=search_fpr_keyid burst=30;
error_page 503 /errors-static/503-rate-limit-vks-fpr.htm;
error_page 404 /errors-static/404-by-fpr.htm;
default_type application/pgp-keys;
add_header Content-Disposition 'attachment; filename="$1$2$3.asc"';
add_header 'Access-Control-Allow-Origin' '*';
@@ -48,42 +40,37 @@ location /vks/v1/ {
}
location ~ ^/vks/v1/by-keyid/(?:0x)?([^/][^/])([^/][^/])(.*)$ {
error_page 404 /errors/404-by-keyid.htm;
limit_req zone=search_fpr_keyid burst=30;
error_page 503 /errors-static/503-rate-limit-vks-fpr.htm;
error_page 404 /errors-static/404-by-keyid.htm;
default_type application/pgp-keys;
add_header Content-Disposition 'attachment; filename="$1$2$3.asc"';
add_header 'Access-Control-Allow-Origin' '*';
try_files /keys/links/by-keyid/$1/$2/$3 =404;
}
location /vks/v1/by-email/ {
limit_req zone=search_email burst=50 nodelay;
error_page 503 /errors-static/503-rate-limit-vks-email.htm;
add_header 'Access-Control-Allow-Origin' '*';
# we have some trouble with uri encoding here. just route through
# hagrid, for now.
proxy_pass http://127.0.0.1:8080;
# error_page 404 /errors-static/404-by-email.htm;
# default_type application/pgp-keys;
# add_header Content-Disposition 'attachment; filename="$1$2$3.asc"';
# try_files /keys/links/by-email/$1/$2/$3 =404;
}
add_header 'Access-Control-Allow-Origin' '*';
error_page 400 /errors/400-vks-invalid.htm;
error_page 400 /errors-static/400-vks-invalid.htm;
return 400;
}
# Common HKP requests.
location /pks/lookup {
# sq keyserver get <KEYID>, gpg --receive-keys <KEYID>
if ($args ~ "^op=get&options=mr&search=(?:0x)?([a-fA-F0-9]{16})$") {
set_by_lua $keyid "return ngx.arg[1]:upper()" $1;
set $args "";
rewrite . /vks/v1/by-keyid/$keyid last;
}
# gpg --receive-keys <FINGERPRINT>
if ($args ~ "^op=get&options=mr&search=(?:0x)?([a-fA-F0-9]{40})$") {
set_by_lua $fingerprint "return ngx.arg[1]:upper()" $1;
set $args "";
rewrite . /vks/v1/by-fingerprint/$fingerprint last;
}
# gpg --locate-key <EMAIL>
if ($request_uri ~ "^/pks/lookup\?op=get&options=mr&search=([^&]{3,}%40[^&]+)") {
set_by_lua $email "return ngx.arg[1]:lower()" $1;
set $args "";
rewrite . /vks/v1/by-email/$email last;
}
# gpg --search '<address@example.org>'
# strip angle brackets - we don't need them, but they cause issues
# with the Rocket framework
# see https://gitlab.com/sequoia-pgp/hagrid/issues/94
@@ -95,17 +82,48 @@ location /pks/lookup {
rewrite . /pks/lookup?$left$middle$right? break;
}
# search by key id
# sq keyserver get <KEYID>, gpg --receive-keys <KEYID>
if ($args ~ "^op=get&options=mr&search=(?:0x)?([a-fA-F0-9]{16})$") {
set_by_lua $keyid "return ngx.arg[1]:upper()" $1;
set $args "";
rewrite . /vks/v1/by-keyid/$keyid last;
}
# search by fpr
# gpg --receive-keys <FINGERPRINT>
if ($args ~ "^op=get&options=mr&search=(?:0x)?([a-fA-F0-9]{40})$") {
set_by_lua $fingerprint "return ngx.arg[1]:upper()" $1;
set $args "";
rewrite . /vks/v1/by-fingerprint/$fingerprint last;
}
# search by email
# gpg --locate-key <EMAIL>
if ($request_uri ~ "^/pks/lookup\?op=get&options=mr&search=([^&]+(?:%40|@)[^&]+)") {
set_by_lua $email "return ngx.arg[1]:lower()" $1;
set $args "";
rewrite . /vks/v1/by-email/$email last;
}
# forward to backend, which will like serve via x-accel-redirect
add_header 'Access-Control-Allow-Origin' '*';
proxy_pass http://127.0.0.1:8080;
error_page 400 /errors-static/400-pks-invalid.htm;
return 400;
}
location /errors-static {
internal;
}
location /errors {
internal;
proxy_pass http://127.0.0.1:8080;
proxy_cache static_cache;
}
location /search {
limit_req zone=search_email burst=50 nodelay;
error_page 503 /errors/503/rate-limit-web;
proxy_pass http://127.0.0.1:8080;
}