Month: June 2025

OpenSSL 3.5.0 with official QUIC server support rpms released

openssl 3.5.0 rpms released and added to all supported platforms.

OpenSSL 3.5.0 is a major release featuring QUIC server support.

We continue to build libs with quic support as a separate non-conflicting package openssl-quic-libs, files have separate .so.81.3 suffix to avoid conflicts with the official .so.3.

All the libraries stack rebuilt with OpenSSL 3.5.0, including ngtcp2 (quic client name changed from qtlsclient to osslclient).

NGINX 1.29.0 Mainline with Brotli, TLS 1.3, OpenSSL 3.5.0, HTTP/2 and HTTP/3 for Red Hat Enterprise Linux, CentOS, Rocky, Oracle, Alma Linux EL7/EL8/EL9/EL10

nginx 1.29.0 Mainline with HTTP/3 support added to EL7, EL8, EL9, EL10 repositories. brotli compression module from Google, http2, ngx cache purge and ngx http geoip2 modules added or built-in. OpenSSL built dynamically using official OpenSSL 3.5.0 with QUIC support.

Our OpenSSL 3.5.0 builds break compatibility with nginx 1.28.x and earlier versions, as they are compiled against quictls project with their own APIs. Thus, to upgrade OpenSSL QUIC libs, please use nginx >= 1.29.0.

*) Feature: support for response code 103 from proxy and gRPC backends; the “early_hints” directive.

*) Feature: loading of secret keys from hardware tokens with OpenSSL provider.

*) Feature: support for the “so_keepalive” parameter of the “listen” directive on macOS.

*) Change: the logging level of SSL errors in a QUIC handshake has been changed from “error” to “crit” for critical errors, and to “info” for the rest; the logging level of unsupported QUIC transport parameters has been lowered from “info” to “debug”.

*) Change: the native nginx/Windows binary release is now built using Windows SDK 10.

*) Bugfix: nginx could not be built by gcc 15 if ngx_http_v2_module or ngx_http_v3_module modules were used.

*) Bugfix: nginx might not be built by gcc 14 or newer with -O3 -flto optimization if ngx_http_v3_module was used.

*) Bugfixes and improvements in HTTP/3.

OpenSSL 3.5.0 in testing

We are tesing OpenSSL 3.5.0 and corresponding builds of ngtcp2, nghttp3, nghttp2, nginx against OpenSSL 3.5.0.

When it will be ready, the plan is to replace quictls (that is poorly supported and marked as abandoned in April 2025) with OpenSSL 3.5.0.

For now, mod_http2 can be built fine, but as soon as we will have conflicts with nginx. Currently, nginx has patches in its dev branch to support OpenSSL 3.5.x and use HTTP/3 from it. Thus, we are waiting for next nginx release to switch from quictls to OpenSSL.

The change will look as follows. Package name will not change (openssl-quic-libs), version will be 3.5.0 (instead of 3.2.x), .so version will remain 81.3. SO API is completely new, so requirements section will be explicitly set to openssl-quic-libs >= 3.5.0.

Please feel free to test (in CodeIT-testing repo) and comment 🙂