-*- coding: utf-8 -*- Changes with Apache 2.5.1 *) mod_proxy_hcheck: Re-enable workers in standard ERROR state. PR 66302. [Alessandro Cavaliere ] *) mod_proxy_hcheck: Detect AJP/CPING support correctly. PR 66300. [Alessandro Cavaliere ] *) mod_proxy_hcheck: hcmethod now allows for HTTP/1.1 requests using GET11, HEAD11 and/or OPTIONS11. [Jim Jagielski] *) mod_md: a bug was fixed that caused very large MDomains with the combined DNS names exceeding ~7k to fail, as request bodies would contain partially wrong data from uninitialized memory. This would have appeared as failure in signing-up/renewing such configurations. [Stefan Eissing, Ronald Crane (Zippenhop LLC)] *) mod_proxy_http: Avoid 417 responses for non forwardable 100-continue. PR 65666. [Yann Ylavic] *) mod_ssl: SSLFIPS compatible with OpenSSL 3.0. PR 66063. [Petr Sumbera , Yann Ylavic] *) core: the conf/mime.types has been updated in conformance with RFC 9239: - .js moved from 'application/javascript' to 'text/javascript' - .mjs was added as 'text/javascript' [Mathias Bynens <@mathiasbynens> via PR 318] *) mod_md: the `MDCertificateAuthority` directive can take more than one URL/name of an ACME CA. This gives a failover for renewals when several consecutive attempts to get a certificate failed. A new directive was added: `MDRetryDelay` sets the delay of retries. A new directive was added: `MDRetryFailover` sets the number of errored attempts before an alternate CA is selected for certificate renewals. [Stefan Eissing] *) mod_heartmonitor: Set the documented default value "10" for HeartbeatMaxServers instead of "0". With "0" no shared memory slotmem was initialized. [Rainer Jung] *) mod_md: fixed a bug leading to failed transfers for OCSP stapling information when more than 6 certificates needed updates in the same run. [Stefan Eissing] *) mod_http2: use the new REQUEST buckets to forward request on secondary connections. Use the now generic ap_process_connection() in h2 workers to process those. [Stefan Eissing] *) Implement full auto status ("key: value" type status output). Especially not only status summary counts for certificates and OCSP stapling but also lists. Auto status format is similar to what was used for mod_proxy_balancer. [Rainer Jung] *) core/mod_http: use REQUEST meta buckets and a new HTTP/1.x specific input filter to separate the handling for HTTP requests from the handling of HTTP/1.x request parsing and checks. A new HTTP1_REQUEST_IN filter installs itself on http/1.1 connections before a request is being read. It generates either a REQUEST meta bucket on success or an ERROR bucket with the proposed response status. The core connection processing, relying on ap_read_request(), now expects a REQUEST or ERROR bucket from the input filters and is agnostic to specific HTTP versions and how they bring requests into the server. [Stefan Eissing] *) mod_http2: remove unused and insecure code. Fixes PR66037. Thanks to Ronald Crane (Zippenhop LLC) for reporting this. [Stefan Eissing] *) mod_md: added support for managing certificates via a local tailscale demon for users of that secure networking. This gives trusted certificates for tailscale assigned domain names in the *.ts.net space. [Stefan Eissing] *) mod_md: a possible NULL pointer deref was fixed in the JSON code for persisting time periods (start+end). Fixes #282 on mod_md's github. Thanks to @marcstern for finding this. *) core: Avoid an overflow on large inputs in ap_is_matchexp. PR 66033 [Ruediger Pluem] *) core/mod_http: use RESPONSE meta buckets and a new HTTP/1.x specific filter to send responses through the output filter chain. Specifically: the HTTP_HEADER output filter and ap_send_interim_response() create a RESPONSE bucket and no longer are concerned with HTTP/1.x serialization. A new HTTP1_RESPONSE_OUT transcode filter writes the proper HTTP/1.x bytes when dealing with a RESPONSE bucket. That filter installs itself on the pre_read_request hook when the connection has protocol 'http/1.1'. [Stefan Eissing] *) MPM event: Restart children processes killed before idle maintenance. PR 65769. [Yann Ylavic, Ruediger Pluem] *) core: Disable TCP_NOPUSH optimization on OSX since it might introduce transmission delays. PR 66019. [Yann Ylavic] *) ab: Allow for TLSv1.3 when the SSL library supports it. [abhilash1232 gmail.com, xiaolongx.jiang intel.com, Yann Ylavic] *) ab: Add the -W option to use worker threads, allowing for multiple CPUs to handle the load. [Yann Ylavic] *) mod_substitute: Fix an integer overflow that can happen in very special setups. PR 66034 [Ruediger Pluem] *) core: make ap_escape_quotes() work correctly on strings with more than MAX_INT/2 characters, counting quotes double. Credit to for finding this. [Stefan Eissing] *) core: adding a new hook and method to the API: create_secondary_connection and ap_create_secondary_connection() to setup connections related to a "master" one, as used in the HTTP/2 protocol implementation. *) mod_http2: using the new API calls to get rid of knowledge about how the core handles conn_rec specifics. Improvements in pollset stream handling to use less sets. Using atomic read/writes instead of volatiles now. Keeping a reserve of "transit" pools and bucket_allocs for use on secondary connections to avoid repeated setup/teardowns. *) mod_proxy: Set a status code of 502 in case the backend just closed the connection in reply to our forwarded request. [Ruediger Pluem] *) MPM event: Fix accounting of active/total processes on ungraceful restart, PR 66004 (follow up to PR 65626 from 2.4.52). [Yann Ylavic] *) mod_proxy: Add backend port to log messages to ease identification of involved service. [Rainer Jung] *) mod_systemd: Systemd socket activation can now be enabled at build time but disabled at run time, if mod_systemd is not loaded. [Lubos Uhliarik ] *) ab: Add an optional ramp delay when starting concurrent connections so as to not trigger denial of service protection in the network. Report levels of concurrency achieved in cases where the test completes before full concurrency is achieved. [Graham Leggett] *) mod_http2: preserve the port number given in a HTTP/1.1 request that was Upgraded to HTTP/2. Fixes PR65881. [Stefan Eissing] *) mod_http2: :scheme pseudo-header values, not matching the connection scheme, are forwarded via absolute uris to the http protocol processing to preserve semantics of the request. Checks on combinations of pseudo-headers values/absence have been added as described in RFC 7540. Fixes . [Stefan Eissing] *) core/mpm: add hook 'child_stopped` that gets called when the MPM has stopped all processing in a child process. This is when all running threads shall be stopped and joined. [Stefan Eissing] *) core: Make sure and check that LimitXMLRequestBody fits in system memory. [Ruediger Pluem, Yann Ylavic] *) ab: Fix the detection for when the server performed a legitimate connection close as per RFC7230 6.3.1. We must check whedther the connection was previously kept alive, and not whether the current closed request is keepalive. [Graham Leggett] *) mod_rewrite: Make URI-to-filename rewrites work transparently with proxy early mappings (mapping=servlet/decoded). [Yann Ylavic] *) mod_md: do not interfere with requests to /.well-known/acme-challenge/ resources if challenge type 'http-01' is not configured for a domain. Fixes . [Stefan Eissing] *) mod_proxy: Bump limit of proxy workers names to 384 characters. PR 53218 [Yann Ylavic] *) core: Simpler connection close logic if discarding the request body fails. [Yann Ylavic, Ruediger Pluem] *) mod_proxy: Use the maxium of front end and backend timeouts instead of the minimum when tunneling requests (websockets, CONNECT requests). Backend timeouts can be configured more selectively (per worker if needed) as front end timeouts and typically the backend timeouts reflect the application requirements better. PR 65886 [Ruediger Pluem] *) mod_watchdog: use the `child_stopping` and `child_stopped` hooks to shutdown workers before pool destruction releases global resources and libraries. [Stefan Eissing] *) ab: Respond appropriately to SSL_ERROR_WANT_READ and SSL_ERROR_WANT_WRITE. Previously the correct event was polled for, but the response to the poll would call write instead of read, and read instead of write. PR 55952 [Graham Leggett] *) mod_md: the status description in MDomain's JSON, exposed in the md-status handler (if configure) did sometimes not carry the correct message when certificates needed renew. [Stefan Eissing] *) mod_tls: Fix a linkage issue with rustls when compiled with rust 1.55, 1.56 or 1.57. This prevents the loading of the module because of an undefined symbol: fmaf See https://github.com/rustls/rustls-ffi/issues/133 [Christophe Jaillet] *) ap_regex: Use Thread Local Storage (TLS) to recycle ap_regexec() buffers when an efficient TLS implementation is available. [Yann Ylavic] *) mod_reqtimeout: Fix missing handshake= timeout enforcement. [Yann Ylavic] *) mod_dav: Fix regression when gathering properties which could lead to huge memory consumption proportional to the number of resources. [Evgeny Kotkov, Ruediger Pluem] *) mod_unixd: CoreDumpDirectory requires enabling tracing on FreeBSD 11+. PR 65819. [David CARLIER ] *) mpm_event: Fix a possible listener deadlock on heavy load when restarting and/or reaching MaxConnectionsPerChild. PR 65769. [Yann Ylavic] *) http: Enforce that fully qualified uri-paths not to be forward-proxied have an http(s) scheme, and that the ones to be forward proxied have a hostname, per HTTP specifications. [Ruediger Pluem, Yann Ylavic] *) mod_http2: fixed a bug in v2.0.0 that could lead to an infinite loop when clients close connections prematurely. Enhanced the scoreboard status updates on h2 connections for mod_status. 'server-status' now gives a better idea what the connection is working on. [Stefan Eissing] *) mod_http: Correctly sent a 100 Continue status code when sending an interim response as result of an Expect: 100-Continue in the request and not the current status code of the request. PR 65725 [Ruediger Pluem] *) mod_proxy_connect: Honor the smallest of the backend or client timeout while tunneling. [Yann Ylavic] *) mod_http2: a regression in v1.15.24 of the modules was fixed that could lead to httpd child processes not being terminated on a graceful reload or when reaching MaxConnectionsPerChild. When unprocessed h2 requests were queued at the time, these could stall. See . [@hansborr, @famzah, Stefan Eissing] *) mod_proxy_uwsgi: Remove duplicate slashes at the beginning of PATH_INFO. PR 65616. [Ruediger Pluem] *) mod_md: Fix memory leak in case of failures to load the private key. PR 65620 [ Filipe Casal ] * mod_http2: the new pollset implementation is disabled when compiling with an APR version less than 1.6. *) mod_autoindex: Add "IndexForbiddenReturn404" to return 404 instead of a 403 when Options does not included "indexes". [Eric Covener] *) mod_dir: Add "NotFound" option to "DirectorySlash" directive to return 404 instead of a DirectorySlash redirect. [Eric Covener] *) mod_md: adding v2.4.8 with the following changes - Added support for ACME External Account Binding (EAB). Use the new directive `MDExternalAccountBinding` to provide the server with the value for key identifier and hmac as provided by your CA. While working on some servers, EAB handling is not uniform across CAs. First tests with a Sectigo Certificate Manager in demo mode are successful. But ZeroSSL, for example, seems to regard EAB values as a one-time-use-only thing, which makes them fail if you create a seconde account or retry the creation of the first account with the same EAB. - The directive 'MDCertificateAuthority' now checks if its parameter is a http/https url or one of a set of known names. Those are 'LetsEncrypt', 'LetsEncrypt-Test', 'Buypass' and 'Buypass-Test' for now and they are not case-sensitive. The default of LetsEncrypt is unchanged. - `MDContactEmail` can now be specified inside a `` section. - Treating 401 HTTP status codes for orders like 403, since some ACME servers seem to prefer that for accessing oders from other accounts. - When retrieving certificate chains, try to read the repsonse even if the HTTP Content-Type is unrecognized. - Fixed a bug that reset the error counter of a certificate renewal and prevented the increasing delays in further attempts. - Fixed the renewal process giving up every time on an already existing order with some invalid domains. Now, if such are seen in a previous order, a new order is created for a clean start over again. See - Fixed a mixup in md-status handler when static certificate files and renewal was configured at the same time. *) mod_http2: - Fixed an issue since 1.15.24 that "Server" headers in proxied requests were overwritten instead of preserved. [PR by @daum3ns] - Added directove 'H2StreamTimeout' to configure a separate value for HTTP/2 streams, overriding server's 'Timeout' configuration. [rpluem] - HTTP/2 connections now use pollsets to monitor the status of the ongoing streams and their main connection when host OS allows this. - Removed work-arounds for older versions of libnghttp2 and checking during configure that at least version 1.15.0 is present. - The HTTP/2 connection state handler, based on an experiment and draft at the IETF http working group (abandoned for some time), has been removed. - H2SerializeHeaders no longer has an effect. A warning is logged when it is set to "on". The switch enabled the internal writing of requests to be parsed by the internal HTTP/1.1 protocol handler and was introduced to avoid potential incompatibilities during the introduction of HTTP/2. - Removed the abort/redo of tasks when mood swings lower the active limit. [Ruediger Pluem, daum3ns, Stefan Eissing] *) core: Be safe with ap_lingering_close() called with a socket NULL-ed by a third-party module. PR 65627. [acmondor , Yann Ylavic] *) mpm_event: Restart stopping of idle children after a load peak. PR 65626. [Yann Ylavic, Ruediger Pluem] *) mod_proxy: SetEnv proxy-nohalfclose (or alike) allows to disable TCP half-close forwarding when tunneling protocols. [Yann Ylavic] *) mod_tls: added mod_tls from abetterinternet, donated by ISRG/Prossimo . - adds font-/backend TLS (v1.2/v1.3) via the Rust rustls crate and its rustls-ffi C binding . - documentation at (adding to Apache's manual TBD) - build support for Apache httpd configure on *nix platforms, rustls is linked statically into mod_tls. *) mod_md: values for External Account Binding (EAB) can now also be configured to be read from a separate JSON file. This allows to keep server configuration permissions world readable without exposing secrets. [Stefan Eissing] *) core: Add ap_unescape_url_ex() for better decoding control, and deprecate unused AP_NORMALIZE_DROP_PARAMETERS flag. [Yann Ylavic, Ruediger Pluem, Stefan Eissing, Joe Orton] *) core: AP_NORMALIZE_DECODE_UNRESERVED should normalize the second dot in the uri-path when it's preceded by a dot. [Yann Ylavic] *) mod_proxy: New tunnel_forward hooking mechanism allowing modules to handle Upgrade(d) protocols data. [Yann Ylavic] *) mod_dav: Correctly handle errors returned by dav providers on REPORT requests. [Ruediger Pluem] *) mod_rewrite: Fix UDS ("unix:") scheme for [P] rules. PR 57691 + 65590. [Janne Peltonen ] *) mod_proxy: Handle UDS URIs with empty hostname ("unix:///...") as if they had no hostname ("unix:/..."). [Yann Ylavic] *) event mpm: Correctly count active child processes in parent process if child process dies due to MaxConnectionsPerChild. PR 65592 [Ruediger Pluem] *) core: Add ap_pre_connection() as a wrapper to ap_run_pre_connection() and use it to prevent that failures in running the pre_connection hook cause crashes afterwards. [Ruediger Pluem] *) mod_md: fixed a bug in handling multiple parallel OCSP requests. These could run into an assertion which terminated (and restarted) the child process where the task was running. Eventually, all OCSP responses were collected, but not in the way that things are supposed to work. See also . The bug was possibly triggered when more than one OCSP status needed updating at the same time. For example for several renewed certificates after a server reload. *) mod_md: when MDMessageCmd for a 'challenge-setup::' fails (!= 0 exit), the renewal process is aborted and an error is reported for the MDomain. This provides scripts that distribute information in a cluster to abort early with bothering an ACME server to validate a dns name that will not work. The common retry logic will make another attempt in the future, as with other failures. Fixed a bug when adding private key specs to an already working MDomain, see . [Stefan Eissing] *) core: Add ap_create_connection() to create either a server or client/proxy connection. *) mod_http2: when a server is restarted gracefully, any idle h2 worker threads are shut down immediately. [Stefan Eissing] *) core: Initialize the request fields on read failure to avoid NULLs. [Yann Ylavic] *) mod_proxy: Do not canonicalize the proxied URL when both "nocanon" and "ProxyPassInterpolateEnv On" are configured. PR 65549. [Joel Self ] *) mpm_event: Fix children processes possibly not stopped on graceful restart. PR 63169. [Joel Self ] *) mod_unique_id: Reduce the time window where duplicates may be generated PR 65159 [Christophe Jaillet] *) Revert "mod_unique_id: Fix potential duplicated ID generation under heavy load. PR 65159" added in 2.4.47. This causes issue on Windows. [Christophe Jaillet] *) mod_proxy_uwsgi: Fix PATH_INFO setting for generic worker. [Yann Ylavic] *) mod_md: Certificate/keys pairs are verified as matching before a renewal is accepted as successful or a staged renewal is replacing the existing certificates. This avoid potential mess ups in the md store file system to render the active certificates non-working. [@mkauf] *) mod_proxy: Fix a potential infinite loop when tunneling Upgrade(d) protocols from mod_proxy_http, and a timeout triggering falsely when using mod_proxy_wstunnel, mod_proxy_connect or mod_proxy_http with upgrade= setting. PRs 65521 and 65519. [Yann Ylavic] *) mod_proxy: Faster unix socket path parsing in the "proxy:" URL. [Yann Ylavic] *) mpm_event: Fix graceful stop/restart of children processes if connections are in lingering close for too long. [Yann Ylavic] *) mod_md: fixed a potential null pointer dereference if ACME/OCSP server returned 2xx responses without content type. Reported by chuangwen. [chuangwen, Stefan Eissing] * core/mpm: add hook 'child_stopping` that gets called when the MPM is stopping a child process. The additional `graceful` parameter allows registered hooks to free resources early during a graceful shutdown. [Yann Ylavic, Stefan Eissing] *) mod_proxy: Fix icomplete initialization of BalancerMember(s) from the balancer-manager, which can lead to a crash. [Yann Ylavic] *) mod_http2: - Aborting requests via RST_STREAM no longer affect the available resources of a connection when the first chunk of the response body has been sent. - H2Min/MaxWorkers behave as intended again. The module will initially create H2MinWorkers threads and add up to H2MaxWorkers when needed. These additional workers time out when idle after H2MaxWorkerIdleSeconds and disappear again. - Added a timeout to h2 worker cleanup to exit latest after 5 seconds of waiting on idle workers to terminate. This happens after all connections have been processed. a WARNING is logged in case workers lagged behind. - When the shutdown of a child is detected (e.g. graceful shutdown), the module will terminate all idle workers above H2MinWorkers right away. This detection currently only happens when a HTTP/2 connection is active. [Stefan Eissing] *) mod_md: - Domain names in `` can now appear in quoted form. - Fixed a failure in ACME challenge selection that aborted further searches when the tls-alpn-01 method did not seem to be suitable. - Changed the tls-alpn-01 setup to only become unsuitable when none of the dns names showed support for a configured 'Protocols ... acme-tls/1'. This allows use of tls-alpn-01 for dns names that are not mapped to a VirtualHost. [Stefan Eissing] *) core/mod_proxy/mod_ssl: Adding `outgoing` flag to conn_rec, indicating a connection is initiated by the server to somewhere, in contrast to incoming connections from clients. Adding 'ap_ssl_bind_outgoing()` function that marks a connection as outgoing and is used by mod_proxy instead of the previous optional function `ssl_engine_set`. This enables other SSL module to secure proxy connections. The optional functions `ssl_engine_set`, `ssl_engine_disable` and `ssl_proxy_enable` are now provided by the core to have backward compatibility with non-httpd modules that might use them. mod_ssl itself no longer registers these functions, but keeps them in its header for backward compatibility. The core provided optional function wrap any registered function like it was done for `ssl_is_ssl`. [Stefan Eissing] *) mod_h2: Don't strip headers from 304 responses. [Yann Ylavic] *) mod_proxy: Fix possible reuse/merging of Proxy(Pass)Match worker instances with others when their URLs contain a '$' substitution. PR 65419. [Yann Ylavic] *) mpm_prefork: Block signals for child_init hooks to prevent potential threads created from there to catch MPM's signals. [Ruediger Pluem, Yann Ylavic] *) mod_ssl: tighten the handling of ALPN for outgoing (proxy) connections. If ALPN protocols are provided and sent to the remote server, the received protocol selected is inspected and checked for a match. Without match, the peer handshake fails. An exception is the proposal of "http/1.1" where it is accepted if the remote server did not answer ALPN with a selected protocol. This accomodates for hosts that do not observe/support ALPN and speak http/1.x be default. * mod_log_config/mod_ssl: moved the log_handlers registered by mod_ssl into mod_log_config itself. These now use the global `ap_ssl_var_lookup()` functions and work for all running SSL modules. The dependency from mod_ssl to mod_log_config and its header is removed. mod_ssl now provides the content of "{errstr}c" as variable "SSL_CLIENT_VERIFY_ERRSTR". This change should be fully compatible to all deployed configurations. [Stefan Eissing] *) dbm: Split the loading of a dbm driver from the opening of a dbm file. When an attempt to load a dbm driver fails, log clearly which driver triggered the error (not "default"), and what the error was. [Graham Leggett] *) core: Fix a regression that stripped the ETag header from 304 responses. PR 61820 [Ruediger Pluem, Roy T. Fielding] *) core/mod_ssl/mod_md: adding OCSP response provisioning as core feature. This allows modules to access and provide OCSP response data without being tied of each other. The data is exchanged in standard, portable formats (PEM encoded certificates and DER encoded responses), so that the actual SSL/crypto implementations used by the modules are independant of each other. Registration and retrieval happen in the context of a server (server_rec) which modules may use to decide if they are configured for this or not. The area of changes: 1. core: defines 2 functions in include/http_ssl.h, so that modules may register a certificate, together with its issuer certificate for OCSP response provisioning and ask for current response data (DER bytes) later. Also, 2 hooks are defined that allow modules to implement this OCSP provisioning. 2. mod_ssl uses the new functions, in addition to what it did already, to register its certificates this way. If no one is interested in providing OCSP, it falls back to its own (if configured) stapling implementation. 3. mod_md registers itself at the core hooks for OCSP provisioning. Depending on configuration, it will accept registrations of its own certificates only, all certificates or none. [Stefan Eissing] *) mod_proxy_wstunnel: Add ProxyWebsocketFallbackToProxyHttp to opt-out the fallback to mod_proxy_http for WebSocket upgrade and tunneling. [Yann Ylavic] *) mod_proxy_hcheck: Honor worker timeout settings. [Yann Ylavic] *) mod_lua: Add support to Lua 5.4 [Joe Orton, Giovanni Bechis, Ruediger Pluem] *) mod_md: Tolerate a missing "revokeCert" or "keyChange" resource. [Fraser Tweedale ] *) mod_ssl: Add SSL_{CLIENT,SERVER}_B64CERT variables with base64-encoded DER certificates. Add SSL_CLIENT_B64CERT_CHAIN_n equivalents for SSL_CLIENT_CERT_CHAIN_n, and new "ExportBase64CertData" argument for SSLOptions. PR 65169. [Joe Orton] *) mod_proxy_balancer: Include nonce in XML output. PR 63074. Federico Mennite *) mod_http2: Fixed a race condition that could lead to streams being aborted (RST to the client), although a response had been produced. [Stefan Eissing] *) mod_unique_id: Fix potential duplicated ID generation under heavy load. PR 65159 [Jonas Müntener , Christophe Jaillet] *) core: provide ap_ssl_* functions in new http_ssl.h header file. [Stefan Eissing] *) mod_socache_shmcb: Avoid double SHM cleanup and possible crash on restart/stop. PR 59798. [Yann Ylavic] *) mod_md: v2.4.0 with improvements and bugfixes - MDPrivateKeys allows the specification of several types. Beside "RSA" plus optional key lengths elliptic curves can be configured. This means you can have multiple certificates for a Managed Domain with different key types. With ```MDPrivateKeys secp384r1 rsa2048``` you get one ECDSA and one RSA certificate and all modern client will use the shorter ECDSA, while older client will get the RSA certificate. Many thanks to @tlhackque who pushed and helped on this. - Support added for MDomains consisting of a wildcard. Configuring ```MDomain *.host.net``` will match all virtual hosts matching that pattern and obtain one certificate for it (assuming you have 'dns-01' challenge support configured). Addresses #239. - Removed support for ACMEv1 servers. The only known installation used to be Let's Encrypt which has disabled that version more than a year ago for new accounts. - Andreas Ulm () implemented the ```renewing``` call to ```MDMessageCmd``` that can deny a certificate renewal attempt. This is useful in clustered installations, as discussed in #233). - New event ```challenge-setup::```, triggered when the challenge data for a domain has been created. This is invoked before the ACME server is told to check for it. The type is one of the ACME challenge types. This is invoked for every DNS name in a MDomain. - The max delay for retries has been raised to daily (this is like all retries jittered somewhat to avoid repeats at fixed time of day). - Certain error codes reported by the ACME server that indicate a problem with the configured data now immediately switch to daily retries. For example: if the ACME server rejects a contact email or a domain name, frequent retries will most likely not solve the problem. But daily retries still make sense as there might be an error at the server and un-supervised certificate renewal is the goal. Refs #222. - Test case and work around for domain names > 64 octets. Fixes #227. When the first DNS name of an MD is longer than 63 octets, the certificate request will not contain a CN field, but leave it up to the CA to choose one. Currently, Lets Encrypt looks for a shorter name in the SAN list given and fails the request if none is found. But it is really up to the CA (and what browsers/libs accept here) and may change over the years. That is why the decision is best made at the CA. - Retry delays now have a random +/-[0-50]% modification applied to let retries from several servers spread out more, should they have been restarted at the same time of day. - Fixed several places where the 'badNonce' return code from an ACME server was not handled correctly. The test server 'pebble' simulates this behaviour by default and helps nicely in verifying this behaviour. Thanks, pebble! - Set the default `MDActivationDelay` to 0. This was confusing to users that new certificates were deemed not usably before a day of delay. When clocks are correct, using a new certificate right away should not pose a problem. - When handling ACME authorization resources, the module no longer requires the server to return a "Location" header, as was necessary in ACMEv1. Fixes #216. - Fixed a theoretical uninitialized read when testing for JSON error responses from the ACME CA. Reported at . - ACME problem reports from CAs that include parameters in the Content-Type header are handled correctly. (Previously, the problem text would not be reported and retries could exist CA limits.) - Account Update transactions to V2 CAs now use the correct POST-AS-GET method. Previously, an empty JSON object was sent - which apparently LE accepted, but others reject. - MDCertificateFile and MDCertificateKeyFile can now be specified several times to add multiple, static certificates to a MDomain. [Stefan Eissing, @tlhackque, Andreas Ulm] *) mod_session: Improve session parsing. [Yann Yalvic] *) mod_proxy_hcheck: Don't pile up health checks if the previous one did not finish before hcinterval. PR 63010. [Yann Ylavic] *) core: Adding SSL related inquiry functions to the server API. These function are always available, even when no module providing SSL is loaded. They provide their own "shadowing" implementation for the optional functions of similar name that mod_ssl and impersonators of mod_ssl provide. This enables loading of several SSL providing modules when all but one of them registers itself into the new hooks. Two old-style SSL modules will not work, as they replace the others optional functions with their own. Modules using the old-style optional functions will continue to work as core supplies its own versions of those. The following has been added so far: - ap_ssl_conn_is_ssl() to query if a connection is using SSL. - ap_ssl_var_lookup() to query SSL related variables for a server/connection/request. - Hooks for 'ssl_conn_is_ssl' and 'ssl_var_lookup' where modules providing SSL can install their own value supplying functions. - ap_ssl_add_cert_files() to enable other modules like mod_md to provide certificate and keys for an SSL module like mod_ssl. - ap_ssl_add_fallback_cert_files() to enable other modules like mod_md to provide a fallback certificate in case no 'proper' certificate is available for an SSL module like mod_ssl. - ap_ssl_answer_challenge() to enable other modules like mod_md to provide a certificate as used in the RFC 8555 'tls-alpn-01' challenge for the ACME protocol for an SSL module like mod_ssl. The function and its hook provide PEM encoded data instead of file names. - Hooks for 'ssl_add_cert_files', 'ssl_add_fallback_cert_files' and 'ssl_answer_challenge' where modules like mod_md can provide providers to the above mentioned functions. [Stefan Eissing] *) mod_http2: new option 'H2OutputBuffering on/off' which controls the buffering of stream output. The default is on, which is the behaviour of previous mod-h2 versions. When off, all bytes are made available immediately to the main connection for sending them out to the client. This fixes interop issues with certain flavours of gRPC. [Stefan Eissing] *) mod_authnz_ldap: Prevent authentications with empty passwords for the initial bind to fail with status 500. [Ruediger Pluem] *) mod_http2: Fixed reporting of transferred bytes for mod_logio for modifiers %O (and %S) to report the number of transferred header and body lengths. This is still only an approximation of the bytes on the connection. The data is subject to header compression and h2 framing afterwards. [Stefan Eissing] *) mod_cgid: Intercept and log stderr output correctly on Unix systems supporting fd passing. PR 54221. [Joe Orton] *) mod_auth_digest: Fast validation of the nonce's base64 to fail early if the format can't match anyway. [Yann Ylavic] *) mod_xml2enc: Update check to match MIME types matching "+xml" rather than anything containing "xml", avoiding corruption of Microsoft OOXML formats. PR 64339. [Joseph Heenan ] *) mod_proxy_wstunnel: Leave Upgrade requests handling to mod_proxy_http, allowing for (non-)Upgrade negotiation with the origin server. [Yann Ylavic] *) mod_ssl: SSLProxyMachineCertificateFile/Path may reference files which include CA certificates; those CA certs are treated as if configured with SSLProxyMachineCertificateChainFile. [Joe Orton] *) mpm_event: don't reset connections after lingering close, restoring prior to 2.4.28 behaviour. [Yann Ylavic] *) mod_dav_fs: Improve logging output when failing to open files for writing. PR 64413. [Bingyu Shen ] *) mod_proxy: Add optional third argument for ProxyRemote, which configures Basic authentication credentials to pass to the remote proxy. PR 37355. [Joe Orton] *) mod_proxy_http: Fix 100-continue deadlock for spooled request bodies, leading to Request Timeout (408). PR 63855. [Yann Ylavic] *) http: Allow unknown response status' lines returned in the form of "HTTP/x.x xxx Status xxx". [Yann Ylavic] *) mod_proxy_fcgi: Honor "SetEnv proxy-sendcl" to forward a chunked Transfer-Encoding from the client, spooling the request body when needed to provide a Content-Length to the backend. PR 57087. [Yann Ylavic] *) mpm_event: kill connections in keepalive state only when there is no more workers available, not when the maximum number of connections is reached, restoring prior to 2.4.30 behaviour. [Yann Ylavic] *) mod_allowmethods: Allow methods to be added/removed with +/- prefix. PR64785. [Marcel Montes ] *) mod_unique_id: Use base64url encoding for UNIQUE_ID variable, avoiding the use of '@'. PR 57044. [Michael Kaufmann ] *) core: add ReadBufferSize, FlushMaxThreshold and FlushMaxPipelined directives. [Yann Ylavic] *) mod_md: lowered the required minimal libcurl version from 7.50 to 7.29 as proposed by . *) mod_http2: Log requests and sent the configured error response in case of early detected errors like too many or too long headers. [Ruediger Pluem, Stefan Eissing] *) mod_proxy_uwsgi: Fix a crash when sending environment variables with no value. PR 64598 [Ruediger Pluem] *) mod_cgi/mod_cgid: Avoid a second read from a CGI script after a timeout, which effectively doubled the configured timeout setting. PR 64709. [Joe Orton] *) core: handle headers when replying a 304 following RFC7234. [Giovanni Bechis] *) mod_http2: remove support for abandoned http-wg draft . [Stefan Eissing] *) mod_proxy_uwsgi: Error out on HTTP header larger than 16K (hard protocol limit). [Yann Ylavic] *) mod_dav: Some DAV extensions, like CalDAV, specify both document elements and property elements that need to be taken into account when generating a property. The document element and property element are made available in the dav_liveprop_elem structure under the DAV_PROP_ELEMENT key in the resource pool. [Graham Leggett] *) mod_dav: Add utility functions dav_validate_root_ns(), dav_find_child_ns(), dav_find_next_ns(), dav_find_attr_ns() and dav_find_attr() so that other modules get to play too. [Graham Leggett] *) mod_http2: Fixes : "LimitRequestFields 0" now disables the limit, as documented. Fixes : Do not count repeated headers with same name against the field count limit. The are merged internally, as if sent in a single HTTP/1 line. [Stefan Eissing] *) mod_http2: Avoid segfaults in case of handling certain responses for already aborted connections. [Stefan Eissing, Ruediger Pluem] *) core: Remove support for the Content-MD5 header, removed in RFC7231. Functions ap_md5digest() and ap_md5contextTo64() removed, and ContentDigest directive. [Graham Leggett] *) mod_dav: Allow other DAV modules to use dav_get_resource(). [Graham Leggett] *) mpm_common: remove ap_mpm_unregister_poll_callback() and mpm_unregister_poll_callback hook. [Yann Ylavic] *) mod_proxy_http: add asynchronous handling of Upgrade(d) protocols, where idle connections are returned to the MPM and rescheduled on another thread when ready. [Yann Ylavic] *) mod_dav: Add method_precondition hook. WebDAV extensions define conditions that must exist before a WebDAV method can be executed. This hook allows a WebDAV extension to verify these preconditions. [Graham Leggett] *) Add hooks deliver_report and gather_reports to mod_dav.h. Allows other modules apart from versioning implementations to handle the REPORT method. [Graham Leggett] *) Add dav_get_provider(), dav_open_lockdb() and dav_close_lockdb() mod_dav.h. [Graham Leggett] *) "[mod_dav_fs etag handling] should really honor the FileETag setting". - It now does. - Add "Digest" to FileETag directive, allowing a strong ETag to be generated using a file digest. - Add ap_make_etag_ex() and ap_set_etag_fd() to allow full control over ETag generation. - Add concept of "binary notes" to request_rec, allowing packed bit flags to be added to a request. - First binary note - AP_REQUEST_STRONG_ETAG - allows modules to force the ETag to a strong ETag to comply with RFC requirements, such as those mandated by various WebDAV extensions. [Graham Leggett] *) mod_ssl: Fix a race condition and possible crash when using a proxy client certificate (SSLProxyMachineCertificateFile). [Armin Abfalterer ] *) mod_proxy: recognize parameters from ProxyPassMatch workers with dollar substitution, such that they apply to the backend connection. Note that connection reuse is disabled by default to avoid compatibility issues. [Takashi Sato, Jan Kaluza, Eric Covener, Yann Ylavic, Jean-Frederic Clere] *) mod_proxy_http: remove proxy-sendchunked and proxy-sendchunks handling, the default behaviour being now to stream the request body using Content-Length when the length is known and fall back to chunked Transfer-Encoding otherwise (unless proxy-sendcl is set thus requiring that the request body be spooled to memory or filesystem). [Yann Ylavic] *) mod_ldap: Avoid performance overhead of APR-util rebind cache for OpenLDAP 2.2+. PR 64414. [Joe Orton] *) mod_proxy_http: flush spooled request body in one go to avoid leaking (or long lived) temporary file. PR 64452. [Yann Ylavic] *) mod_proxy_fcgi: ProxyFCGISetEnvIf unsets variables when expression evaluates to false. PR64365. [Michael König ] *) mod_proxy_http: handle Upgrade request, 101 (Switching Protocol) response and switched protocol forwarding. [Yann Ylavic] *) mod_ssl: The "ssl_var_lookup" optional function API now takes a const char *name argument and returns a const char * string value. The pool argument must now be non-NULL. [Joe Orton] *) mod_ssl: With OpenSSL 1.1.1 and later, SSLRandomSeed is now ignored. OpenSSL must be configured with a suitable entropy source, or mod_ssl will fail to start up. [Joe Orton] *) mod_ssl: With OpenSSL 1.1.1 and later, client-initiated renegotiation in TLSv1.2 and earlier is blocked at SSL library level (with a TLS warning alert sent), rather than by aborting the connection inside mod_ssl. [Joe Orton] *) core: Add optional "options=" argument to Listen. Supported keywords are "freebind", "reuseport" and "v6only". PR 61865. [Jan Kaluza, Lubos Uhliarik , Joe Orton] *) config: Allow for environment variable substitution with default value, for when the variable is not defined, using format ${VAR?=default value}. [Yann Ylavic] *) htcacheclean: Empty directories in CacheRoot are still present even after using "-t". PR64313 [Petros Marios Prokopiou , Ruediger Pluem, Jean-Frederic Clere] *) mod_reqtimeout: Cannot override default Virtualhost's mod_reqtimeout. PR64295 [Jean-Frederic Clere] *) mod_proxy: Allow ProxyErrorOverride to be restricted to specific status codes. PR63628. [Martin Drößler ] *) configtest: Issue a warning for non-existent directories in config sections. PR63079. [Stephane Blondon ]. *) mod_proxy_http: Fix random memory-corruption in case of an error while reading a response from the backend. PR 64234 [Ruediger Pluem, Barnim Dzwillo ] *) core: Use a temporary file when writing the pid file, avoiding startup failure if an empty pidfile is left over from a previous crashed or aborted invocation of httpd. PR 63140. [Nicolas Carrier , Joe Orton] *) mod_http2: Fixes issue where mod_unique_id would generate non-unique request identifier under load, see . [Michael Kaufmann, Stefan Eissing] *) mod_session_cookie: Add SessionCookieMaxAge to allow the mod_session cookie to be sent as a "session cookie" with no expiration even when the SessionMaxAge will be enforced on the server. PR56040 [Eric Covener] *) mod_session: Fix an issue that blocked new sessions being created after session expiration or other session errors. PR56052 [Eric Covener] *) mod_proxy_hcheck: Allow healthcheck expressions to use %{Content-Type}. PR64140. [Renier Velazco ] *) mod_ssl: Fix memory leak of OCSP stapling response. [Yann Ylavic] *) mod_authz_groupfile: Drop AH01666 from loglevel "error" to "info". PR64172. *) mod_usertrack: Add CookieSameSite, CookieHTTPOnly, and CookieSecure to allow customization of the usertrack cookie. PR64077. [Prashant Keshvani , Eric Covener] *) mpm_event: avoid possible KeepAlveTimeout off by -100 ms. [Eric Covener, Yann Ylavic] *) mod_md: - Prefer MDContactEmail directive to ServerAdmin for registration. New directive thanks to Timothe Litt (@tlhackque). - protocol check for pre-configured "tls-alpn-01" challenge has been improved. It will now check all matching virtual hosts for protocol support. Thanks to @mkauf. - Corrected a check when OCSP stapling was configured for hosts where the responsible MDomain is not clear, by Michal Karm Babacek (@Karm). - Softening the restrictions where mod_md configuration directives may appear. This should allow for use in and sections. If all possible variations lead to the configuration you wanted in the first place, is another matter. [Michael Kaufmann , Timothe Litt (@tlhackque), Michal Karm Babacek (@Karm), Stefan Eissing (@icing)] *) core: ap_method_mask_t type added for method bitmasks, changed from apr_int64_t and used for the method_mask field in ap_method_list_t, AP_METHOD_BIT, allowed field of request_rec, limited field of cmd_parms. PR 63885. [Joe Orton] *) mod_ssl: Do not keep connections to OCSP responders alive when doing OCSP requests. PR 64135. [Ruediger Pluem] *) mod_ssl: Disable client verification on ACME ALPN challenges. Fixes github issue mod_md#172 (https://github.com/icing/mod_md/issues/172). [Michael Kaufmann , Stefan Eissing] *) mod_rewrite: Extend the [CO] (cookie) flag of RewriteRule to accept a SameSite attribute. [Eric Covener] *) Update DOCTYPE tags in server-generated HTML. PR62989. [Andra Farkas , Giovanni Bechis ] *) mod_setenvif: Passing an env-variable parameter of "--early" in non-perdir context runs directives from this module before `RequestHeader ... early` are evaluated. This allows results of SetEnvIf conditionals to be used to modify request headers in early mode. [Eric Covener] *) config: Speed up graceful restarts by using pre-hashed command table. PR 64066. [Giovanni Bechis , Jim Jagielski] *) mod_lua: Add r:headers_in_table, r:headers_out_table, r:err_headers_out_table, r:notes_table, r:subprocess_env_table as read-only native table alternatives that can be iterated over. [Eric Covener] *) configure: Add manualdir and proxycachedir to the APR_ENABLE_LAYOUT macro call. [Graham Leggett] *) Add support for cross compiling to apxs. If apxs is being executed from somewhere other than its target location, add that prefix to includes and library directories. Without this, apxs would fail to find config_vars.mk and exit. [Graham Leggett] *) Add a config layout for OpenWRT. [Graham Leggett] *) mod_http2: Fixed rare cases where a h2 worker could deadlock the main connection. [Yann Ylavic, Stefan Eissing] *) mod_lua: Accept nil assignments to the exposed tables (r.subprocess_env, r.headers_out, etc) to remove the key from the table. PR63971. [Eric Covener] *) mod_http2: Fixed interaction with mod_reqtimeout. A loaded mod_http2 was disabling the ssl handshake timeouts. Also, fixed a mistake of the last version that made `H2Direct` always `on`, regardless of configuration. Found and reported by and . [Stefan Eissing] *) mod_http2: Multiple field length violations in the same request no longer cause several log entries to be written. [@mkauf] *) mod_md: v2.2.4 from github, Fixes a compile time issue with OpenSSL 1.0.2 in the new OCSP code. Skips port checks for domain server_rec selection when "tls-alpn-01" is configured explicitly (related to #133). [@mkauf, Stefan Eissing] *) mod_ssl: Support logging private key material for use with wireshark via log file given by SSLKEYLOGFILE environment variable. Requires OpenSSL 1.1.1. PR 63391. [Joe Orton] *) mod_proxy: Improve tunneling loop to support half closed connections and pending data draining (for protocols like rsync). PR 61616. [Yann Ylavic] *) mod_proxy: Add proxy check_trans hook for proxy modules to possibly decline request handling at early stage. [Yann Ylavic] *) mod_proxy: Put mod_proxy_{connect,wstunnel} tunneling code in common in proxy_util. [Yann Ylavic] *) mod_proxy_http: Fix the forwarding of requests with content body when a balancer member is unavailable; the retry on the next member was issued with an empty body (regression introduced in 2.4.41). [Yann Ylavic] *) mod_ssl: negotiate the TLS protocol version per name based vhost configuration, when linked with OpenSSL-1.1.1 or later. The base vhost's SSLProtocol (from the first vhost declared on the IP:port) is now only relevant if no SSLProtocol is declared for the vhost or globally, otherwise the vhost or global value apply. [Yann Ylavic] *) mod_proxy_http: Fix 100-continue deadlock for spooled request bodies, leading to Request Timeout (408). PR 63855. [Yann Ylavic] *) mod_deflate, mod_brotli: honor "Accept-Encoding: foo;q=0" as per RFC 7231; which means 'foo' is "not acceptable". PR 58158 [Chistophe Jaillet] *) mod_proxy: Fix crash by resolving pool concurrency problems. PR 63503 [Ruediger Pluem, Eric Covener] *) core: On Windows, fix a start-up crash if is used with a path that is not valid (For example, testing for a file on a flash drive that is not mounted) [Christophe Jaillet] *) mod_proxy_balancer: Fix case-sensitive referer check related to CSRF/XSS protection. PR63688. [Armin Abfalterer ] *) mod_authn_socache: Increase the maximum length of strings that can be cached by the module from 100 to 256. PR 62149 [] *) mod_ssl: reverting a 2.4.40 change where a superfluous SSLCertificateChainFile configuration for a domain managed by mod_md caused a startup error. This happened when mod_md installed its fallback certificate, before it got the first real certificate from Lets Encrypt. [Stefan Eissing] *) core, mod_rewrite: Set PCRE_DOTALL by default. Revert via RegexDefaultOptions -DOTALL [Yann Ylavic] *) core: Remove request details from built-in error documents [Eric Covener] *) mod_http2: core setting "LimitRequestFieldSize" is not additionally checked on merged header fields, just as HTTP/1.1 does. [Stefan Eissing, Michael Kaufmann] *) mod_http2: fixed a bug that prevented proper stream cleanup when connection throttling was in place. Stream resets by clients on streams initiated by them are counted as possible trigger for throttling. [Stefan Eissing] *) mod_http2/mpm_event: Fixes the behaviour when a HTTP/2 connection has nothing more to write with streams ongoing (flow control block). The timeout waiting for the client to send WINODW_UPDATE was incorrectly KeepAliveTimeout and not Timeout as it should be. Fixes PR 63534. [Yann Ylavic, Stefan Eissing] *) mod_ssl/mod_md: reversing dependency by letting mod_ssl offer hooks for adding certificates and keys to a virtual host. An additional hook allows answering special TLS connections as used in ACME challenges. Adding 2 new hooks for init/get of OCSP stapling status information when other modules want to provide those. Falls back to own implementation with same behaviour as before. [Stefan Eissing] *) mod_ssl: use OPENSSL_init_ssl() to initialise OpenSSL on versions 1.1+. [Graham Leggett] *) mod_proxy_http2: adding support for handling trailers in both directions. PR 63502. [Stefan Eissing] *) mod_reqtimeout: Fix default rates missing (not applied) in 2.4.39. PR 63325. [Yann Ylavic] *) mod_ldap: Avoid potential crashes in util_ldap_cache_module_kill() or other LDAP related functions during graceful restart of a busy server. PR63305. [Martin Fúsek ] *) mod_cache: Fix parsing of quoted Cache-Control token arguments. PR 63288. [Yann Ylavic] *) mod_md: Store permissions are enforced on file creation, enforcing restrictions in spite of umask. Fixes . [Stefan Eissing] *) mod_ssl: Correctly restore SSL verify state after TLSv1.3 PHA failure. [Michael Kaufmann ] *) Merge consecutive slashes in URL's. Opt-out with `MergeSlashes OFF`. [Eric Covener] *) mod_proxy/ssl: Cleanup per-request SSL configuration anytime a backend connection is recycled/reused to avoid a possible crash with some SSLProxy configurations in or context. PR 63256. [Yann Ylavic] *) mod_mime: Add `MimeOptions` directive to allow Content-Type or all metadata detection to use only the last (right-most) file extension or to be disabled per-dir. [Eric Covener] *) MPMs unix: bind the bucket number of each child to its slot number, for a more efficient per bucket maintenance. [Yann Ylavic] *) http: Fix possible empty response with mod_ratelimit for HEAD requests. PR 63192. [Yann Ylavic] *) mod_cache_socache: Avoid reallocations and be safe with outgoing data lifetime. [Yann Ylavic] *) mod_reqtimeout: Allow to configure (TLS-)handshake timeouts. PR 61310. [Yann Ylavic] *) mod_auth_digest: Fix a race condition. Authentication with valid credentials could be refused in case of concurrent accesses from different users. PR 63124 [Simon Kappel ] *) mod_ssl: Don't unset FIPS mode on restart unless it's forced by configuration (SSLFIPS on) and not active by default in OpenSSL. PR 63136. [Yann Ylavic] *) mod_ssl: give mod_md the chance to override certificate after ALPN protocol negotiation. [Stefan Eissing] *) mod_proxy_wstunnel: Fix websocket proxy over UDS. PR 62932 *) mod_negociation: LanguagePriority should be case-insensitive in order to match AddLanguage behavior. PR 39730 [Christophe Jaillet] *) mod_session: Always decode session attributes early. [Hank Ibell] *) core: Incorrect values for environment variables are substituted when multiple environment variables are specified in a directive. [Hank Ibell] *) core: Split out the ability to parse wildcard files and directories from the Include/IncludeOptional directives into a generic set of functions ap_dir_nofnmatch() and ap_dir_fnmatch(). [Graham Leggett] *) mod_ssl: Fix mod_authz provider for "require ssl" directive to check correctly on HTTP/2 connections. Fixes PR 62654. [Stefan Eissing] *) mod_ssl: clear *SSL errors before loading certificates and checking afterwards. Otherwise errors are reported when other SSL using modules are in play. Fixes PR 62880. [Michael Kaufmann] *) core: Ensure that aborted connections are logged as such. PR 62823 [Arnaud Grandville ] *) mpm_event: Stop issuing AH00484 "server reached MaxRequestWorkers..." when there are still idle threads available. When there are less idle threads than MinSpareThreads, issue new one-time message AH10159. Matches worker MPM. [Eric Covener] *) mod_proxy_scgi, mod_proxy_uwsgi: improve error handling when sending the body of the response. [Jim Jagielski] *) mod_session_cookie: avoid duplicate Set-Cookie header in the response. [Emmanuel Dreyfus , Luca Toscano] *) mod_dav_fs: Set a default DAVLockDB within the state directory. [Joe Orton] *) core: Add DefaultStateDir and layout-specific state directory created at "make install". [Joe Orton] *) ab: Add client certificate support. [Graham Leggett] *) mod_proxy_hcheck: Fix issues with TCP health checks. PR 61499 [Dominik Stillhard ] *) MPMs: Initialize all runtime/asynchronous objects on a dedicated pool and before signals handling to avoid lifetime issues on restart or shutdown. PR 62658. [Yann Ylavic] *) core: Add StrictHostCheck to allow unconfigured hostnames to be rejected. [Eric Covener] *) mod_status: Cumulate CPU time of exited child processes in the "cu" and "cs" values. Add CPU time of the parent process to the "c" and "s" values. [Rainer Jung] *) mod_status: Add cumulated response duration time in milliseconds. [Rainer Jung] *) mod_status: Complete the data shown for async MPMs in "auto" mode. Added number of processes, number of stopping processes and number of busy and idle workers. [Rainer Jung] *) mod_proxy: Improve the balancer member data shown in mod_status when "ProxyStatus" is "On": add "busy" count and show byte counts in auto mode always in units of kilobytes. [Rainer Jung] *) mod_proxy: If ProxyPassReverse is used for reverse mapping of relative redirects, subsequent ProxyPassReverse statements, whether they are relative or absolute, may fail. PR 60408. [Peter Haworth ] *) mod_ratelimit: Don't interfere with "chunked" encoding, fixing regression introduced in 2.4.34. PR 62568. [Yann Ylavic] *) mod_proxy_http: forward 100-continue, and minimize race conditions when reusing backend connections. PR 60330. [Yann Ylavic, Jean-Frederic Clere] *) mod_proxy: Remove load order and link dependency between mod_lbmethod_* modules and mod_proxy. PR 62557. [Ruediger Pluem, William Rowe] *) mod_md: more robust handling of http-01 challenges and hands-off when module should not be involved, e.g. challenge setup by another ACME client. [Stefan Eissing] *) ru, zh-cn and zh-tw translations of errordocs have been added. Contributed by Alexander Gaganashvili and CodeingBoy *) mod_userdir: If several directories are given in a UserDir directive, only files in the first existing one are checked. If the file is not found there, the other possible directories are not checked. The doc clearly states that they will be checked one by one, until a match is found or an external redirect is performed. PR 59636. [Christophe Jaillet] *) mod_rewrite: Only create the global mutex used by "RewriteMap prg:" when this type of map is present in the configuration. PR62311. [Hank Ibell ] *) mod_ldap: Abort on LDAP locking errors. [Eric Covener] *) mod_ssl: Support loading certificates and private keys from the PKCS#11 OpenSSL engine. [Anderson Sasaki , Joe Orton] *) http: LimitRequestBody applies to proxied requests. [Yann Ylavic] *) mod_logio: Add LogIOTrackTTFU and %^FU logformat to log the time difference between request start and last request body byte read (finished upload). [Rainer Jung] *) mod_ssl: add support for TLSv1.3 (tested with OpenSSL v1.1.1-pre4, other libs may need more sugar). SSL(Proxy)CipherSuite now has an optional first parameter for the protocol the ciphers are for. Directive "SSLVerifyClient" now triggers certificate retrieval from the client (this is not fully tested - but fails in similar fashion as in TLSv1.2 in my setups). Verifying the client fails exactly the same for HTTP/2 connections for all SSL protocols, as this would need to trigger the master connection thread - which we do not support right now. Renegotiation of ciphers is intentionally ignored for TLSv1.3 connections. "SSLCipherSuite" does not allow to specify TLSv1.3 ciphers in a directory context (because it cannot work) and TLSv1.2 or lower ciphers are not relevant, as cipher suites are completely separate. This means there is a bit if a world split when simultaneously having TLSv1.2 and TLSv1.3 connections to the same server. [Yann Ylavic, Stefan Eissing] *) mod_ssl: proper checks for libressl 2.07/8 and its TLSv1_3 support, see PR 62236. [Bernard Spil ] *) mod_cgi: Add CGIScriptTimeout to make mod_cgi's timeout per-directory and independent of the core Timeout directive. PR 62229. [Hank Ibell ] *) mod_ssl: heavily simplified SSLPolicy. No more user defines, no propxy policies, just the basic "modern", "intermediate" and "old" as specified by Mozilla security. [Stefan Eissing] *) mod_md: fixes error in renew window calculation that may lead to mod_md running watchdog in a tight loop until actual renewal becomes necessary. [Stefan Eissing] *) mod_md: /.well-known/acme-challenge requests that cannot be answered for hostnames outside the configured MDs are free to be answered by other handlers. This allows co-existance between mod_md and other ACME clients on the same server (implements PR62189). [Stefan Eissing, Arkadiusz Miskiewicz ] *) core: Create a conn_config_t structure to hold an extendable core config rather than consuming the whole pointer with the connection socket. [Graham Leggett] *) core: adding AP_DECLARE for ap_parse_vhost_addrs() and minor bump mmn. Resolves building mod_ssl on Windows. [Stefan Eissing, Gregg Smith] *) core: adding defines to allow interworking with honggfuzz without further patches. [Stefan Eissing, Robert Swiecki] *) mod_headers: 'RequestHeader set|edit|edit_r Content-Type X' could inadvertently modify the Content-Type _response_ header. Applies to Content-Type only and likely to only affect static file responses. [Eric Covener] *) mod_cgi: Improve AH01215 messages to make it more clear that the message is the CGI scripts stderr output. PR 61980. [Hank Ibell ] *) mod_headers: Allow 'Header unset Content-Type' to remove the Content-Type header. PR 61983. [Hank Ibell ] *) mod_md v1.1.8: new configuration directive "MDBaseServer on|off" to allow/inhibit management of the base server domains outside VirtualHosts. By default, this is "off", e.g. mod_md will not manage certificates or perform https: redirections on the base server. [Stefan Eissing] *) core: Add "AcceptErrorsNonFatal" to allow ECONNREFUSED, ECONNABORTED, and ECONNRESET during the client accept() to not trigger graceful shutdown of the child process. [Eric Covener] *) mod_md v1.1.7: - MDMustStaple was unable to create the necessary OpenSSL OBJ identifier on some platforms, possibly because this fails if the OID is already configured in ```openssl.cnf```, see [here](https://github.com/openssl/openssl/issues/2795). - Two memory leaks in cert issuer and alt-names lookup eliminated by Yann Ylavic. - Changing MDMustStaple triggers certificate renewal. - More verbosity when *not* handing out certificates, e.g. mod_ssl asks, but mod_md has no idea what it is talking about. Some people report misbehaviour here. - Re-enabled support for md_get_credentials() function that was used in older mod_ssl patch, so that people with old patched servers get a chance to upgrade. [Stefan Eissing, Yann Ylavic] *) mod_substitute: Allow expressions in the substitution, prefixed with expr= [Eric Covener] *) mod_md: fixed mem pool usage for auto-added server names. Added error logging of exact ACME response when challenges failed. [Stefan Eissing] *) mod_md: reverses most of v1.0.5 optimization of post_config init, so that mod_ssl can ask for certificates without crashing. [Stefan Eissing] *) mod_proxy: allow SSLProxyCheckPeer* usage for all proxy modules. PR 61857. [Yann Ylavic] *) mod_proxy_html: fix handling of elements. PR 58121. [Nick Kew] *) mod_md: fixed backward compatibility to old is now . [Stefan Eissing] *) mod_ssl: renamed section . [Stefan Eissing] *) mod_md: new module for managing domains across VirtualHosts with ACME protocol implementation for automated certificate signup and renewal. Default CA is the test area of Let's Encrypt right now, so certificates root will not be valid. Will be switched to the real service endpoint rather soon. If you need it now, configure 'MDCertificateAuthority https://acme-v01.api.letsencrypt.org/directory'. [Stefan Eissing] *) mod_rewrite: Add 'RewriteOptions LongURLOptimization' to free memory from each set of unmatched rewrite conditions. [Eric Covener] *) Allow the argument to , , , , and to be quoted. This is primarily for the benefit of . [Eric Covener] *) Introduce request taint checking framework to prevent privilege hijacking through .htaccess. [Nick Kew] *) Add and directives. [Joe Orton] *) When using mod_status with the Event MPM, report the number of requests associated with an active connection in the "ACC" field. Previously zero was always reported with this MPM. PR60647. [Eric Covener] *) mod_proxy_wstunnel: Reliably run before mod_proxy_http. [Eric Covener] *) http: Allow unknown response status' lines returned in the form of "HTTP/x.x xxx Status xxx". [Yann Ylavic] *) core: Add configuration section to allow any file on disk to be used as a conditional. [Edward Lu, Eric Covener] *) mod_crypto: Add the all purpose crypto filters with support for HLS. [Graham Leggett] *) core: Drop an invalid Last-Modified header value coming from a FCGI/CGI script instead of replacing it with Unix epoch. Warn the users about Last-Modified header value replacements and violations of the RFC. [Yann Ylavic, Luca Toscano, William Rowe, Jacob Champion] *) mod_dav: Allow other modules to become providers and add ACLs to the DAV response. [Jari Urpalainen , Graham Leggett] *) mod_dav: Add dav_begin_multistatus, dav_send_one_response, dav_finish_multistatus, dav_send_multistatus, dav_handle_err, dav_failed_proppatch, dav_success_proppatch to mod_dav.h. [Jari Urpalainen , Graham Leggett] *) core: explicitly exclude 'h2' from protocols announced via an Upgrade: header as commanded by http-wg. [Stefan Eissing] *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy AJP13 authentication. PR 53098. [Dmitry A. Bakshaev ] *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes or sockets. [Graham Leggett] *) core: Extend support for setting aside data from the network input filter to any connection or request input filter. [Graham Leggett] *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett] *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039. [Eric Covener] *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs. [Graham Leggett] *) mod_cache: Consider Cache-Control: s-maxage in expiration calculations. [Eric Covener] *) mod_cache: Allow caching of responses with an Expires header in the past that also has Cache-Control: max-age or s-maxage. PR55156. [Eric Covener] *) mod_session: Introduce SessionExpiryUpdateInterval which allows to configure the session/cookie expiry's update interval. PR 57300. [Paul Spangler ] *) core: Extend support for asynchronous write completion from the network filter to any connection or request filter. [Graham Leggett] *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no more documented since dec 2012 (r1415960). [Christophe Jaillet] *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs after other resource-level filters. [Eric Covener] *) http: Don't remove the Content-Length of zero from a HEAD response if it comes from an origin server, module or script. [Yann Ylavic] *) http: Add support for RFC2324/RFC7168. [Graham Leggett] *) mod_authn_core: Add expression support to AuthName and AuthType. [Graham Leggett] *) suexec: Filter out the HTTP_PROXY environment variable because it is treated as alias for http_proxy by some programs. [Stefan Fritsch] *) mod_proxy_http: Don't establish or reuse a backend connection before pre- fetching the request body, so to minimize the delay between it is supposed to be alive and the first bytes sent: this is a best effort to prevent the backend from closing because of idle or keepalive timeout in the meantime. Also, handle a new "proxy-flushall" environment variable which allows to flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic] *) core: Define and UnDefine are no longer permitted in directory context. Previously they would always be evaluated as the configuration was read without regard for the directory context. [Eric Covener] *) config: For directives that do not expect any arguments, enforce that none are specified in the configuration file. [Joachim Zobel , Eric Covener] *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing how the input was tokenized. PR 56528. [Edward Lu ] *) mod_proxy: Don't put non balancer-member workers in error state by default for connection or 500/503 errors, and honor status=+I for any error. PR 48388. [Yann Ylavic] *) ap_expr: Add filemod function for checking file modification dates [Daniel Gruno] *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since r1608202. [Eric Covener] *) apreq: Content-Length header should be always interpreted as a decimal. Leading 0 could be erroneously considered as an octal value. PR 56598. [Chris Card ] *) mod_proxy: Now allow for 191 character worker names, with non-fatal errors if name is truncated. PR53218. [Jim Jagielski] *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support for channel bindings. [Simo Sorce ] *) mod_proxy_wstunnel: Concurrent websockets messages could be lost or delayed with ProxyWebsocketAsync enabled. [Edward Lu ] *) core, mod_info: Add compiled and loaded PCRE versions to version number display. [Rainer Jung] *) mod_authnz_ldap: Return LDAP connections to the pool before the handler is run, instead of waiting until the end of the request. [Eric Covener] *) mod_proxy_html: support automatic detection of doctype and processing of FPIs. PR56285 [Micha Lenk , Nick Kew] *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection to resume. PR56333 [Artem , Edward Lu ] *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener] *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous processing mode. [Eric Covener] *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove unnecessary apr_pstrdup() and strlen(). [Graham Leggett] *) Add the ldap-search option to mod_authnz_ldap, allowing authorization to be based on arbitrary expressions that do not include the username. [Graham Leggett] *) Add the ldap function to the expression API, allowing LDAP filters and distinguished names based on expressions to be escaped correctly to guard against LDAP injection. [Graham Leggett] *) Add module mod_ssl_ct, which provides an implementation of Certificate Transparency (RFC 6962) for httpd. [Jeff Trawick] *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded websockets connection as it is being close down. [Eric Covener] *) mod_proxy_wstunnel: Allow the administrator to cap the amount of time a synchronous websockets connection stays idle with ProxyWebsocketIdleTimeout. [Eric Covener] *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay. [Eric Covener] *) mod_proxy_wstunnel: Stop leaking websockets backend connections under event MPM (trunk-only). [Eric Covener] *) mod_proxy_http: Add detach_backend hook (potentially usable in other proxy scheme handlers). [Jeff Trawick] *) mod_deflate: Add DeflateAlterETag to control how the ETag is modified. The 'NoChange' parameter mimics 2.2.x behavior. PR 45023, PR 39727. [Eric Covener] *) mod_dir: Default to 2.2-like behavior and skip execution when method is neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch] *) mod_rewrite: Rename the handler that does per-directory internal redirects to "rewrite-redirect-handler" from "redirect-handler" so it is less ambiguous and less likely to be reused. [Eric Covener] *) mod_rewrite: Protect against looping with the [N] flag by enforcing a default limit of 10000 iterations, and allowing each rule to change its limit. [Eric Covener] *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder. [Jeff Trawick] *) Add HttpContentLengthHeadZero and HttpExpectStrict directives. [Yehuda Sadeh , Justin Erenkrantz] *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all configured SSL CA certificates to stdout the same way as DUMP_CERTS does. [Jan Kaluza] *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl to support write completion. [Graham Leggett] *) core: Add parse_errorlog_arg callback to ap_errorlog_provider to allow providers to check the ErrorLog argument. [Jan Kaluza] *) mod_cgid: Use the servers Timeout for each read from a CGI script, allow override with new CGIDRequestTimeout directive. PR43494 [Eric Covener, Toshikuni Fukaya ] *) core: ensure any abnormal exit is reported to stderr if it's a tty. PR 55670 [Nick Kew] *) mod_lua: Let the Inter-VM get/set functions work with a global shared memory pool instead of a per-process pool. [Daniel Gruno] *) ldap: Support ldaps when using the Microsoft LDAP SDK. PR 54626. [Jean-Frederic Clere] *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0 to avoid performance problems when subgroups aren't in use. [Eric Covener] *) mod_syslog: New module implementing syslog ap_error_log provider. Previously, this code was part of core, now it's in separate module. [Jan Kaluza] *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move syslog support from core to new mod_syslog. [Jan Kaluza] *) mod_status, mod_echo: Fix the display of client addresses. They were truncated to 31 characters which is not enough for IPv6 addresses. This is done by deprecating the use of the 'client' field and using the new 'client64' field in worker_score. PR 54848 [Bernhard Schmidt , Jim Jagielski] *) core: merge AllowEncodedSlashes from the base configuration into virtual hosts. [Eric Covener] *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh [Eric Covener] *) mod_ldap: Don't keep retrying if a new LDAP connection times out. [Eric Covener] *) mod_deflate: permit compilation of mod_deflate against a zlib that has been configured with -D Z_PREFIX, which redefines the token "deflate". [Eric Covener] *) mod_auth_digest: Use the secret when generating nonces in all cases and not only when AuthName is used in .htaccess files (this change may cause problems if used with round robin load balancers). Don't regenerate the secret on graceful restarts. PR 54637 [Stefan Fritsch] *) core: Stop the HTTP_IN filter from attempting to write error buckets to the output filters, which is bogus in the proxy case. Create a clean mapping from APR codes to HTTP status codes, and use it where needed. [Graham Leggett] *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981 [Basant Kumar Kukreja , Alejandro Alvarez ] *) mod_ldap: LDAP connections used for authentication were not respecting LDAPConnectionPoolTimeout. PR 54587 *) core: Add option to add valgrind support. Use it to reduce false positive warnings in mod_ssl. [Stefan Fritsch] *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache: Cache the result of the most recent password hash verification for every keep-alive connection. This saves some expensive calculations. [Stefan Fritsch] *) http: Remove support for Request-Range header sent by Navigator 2-3 and MSIE 3. [Stefan Fritsch] *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP conformance or to only log the found problems. [Stefan Fritsch] *) EventOpt MPM *) core: Add LogLevelOverride directive that allows to override the loglevel for clients from certain IPs. This also works for things like the SSL handshake where LogLevel ... is evaluated too late. [Stefan Fritsch] *) core: Add new directive Warning to issue warnings from a configuration file. Both Warning and Error now generate a timestamped log message. [Fabien Coelho] *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR variables. [Stefan Fritsch] *) core: New directive HttpProtocol which allows to disable HTTP/0.9 support. [Stefan Fritsch] *) mod_allowhandlers: New module to forbid specific handlers for specific directories. [Stefan Fritsch] *) mod_systemd: New module, for integration with systemd on Linux. [Jan Kaluza ] *) WinNT MPM: Store pid and generation for each thread in scoreboard to allow tracking of threads from exiting children via mod_status or other such mechanisms. [Jeff Trawick] *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR: - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid() - mod_cache: thundering herd lock directory - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file - mod_ldap: shared memory cache - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache [Jeff Trawick] *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210. [Matthew Steele ] *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will be compiled by the build compiler instead of the host compiler. Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected. PR 51257. [Guenter Knauf] *) core: In maintainer mode, replace apr_palloc with a version that initializes the allocated memory with non-zero values, except if AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch] *) mod_policy: Add a new testing module to help server administrators enforce a configurable level of protocol compliance on their servers and application servers behind theirs. [Graham Leggett] *) mod_firehose: Add a new debugging module able to record traffic passing through the server in such a way that connections and/or requests be reconstructed and replayed. [Graham Leggett] *) mod_noloris *) APREQ *) Simple MPM *) mod_serf [Apache 2.5.0-dev includes those bug fixes and changes with the Apache 2.4.xx tree as documented below, except as noted.] Changes with Apache 2.4.x and later: *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup Changes with Apache 2.2.x and later: *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup Changes with Apache 2.0.x and later: *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup