Program: CWE-79
Project: CVE-2021-32792
Buggy source:
06/21/2021
- strip A256GCM JWT header from encrypted JWTS used for state cookies, cache encryption and by-value session cookies
  resulting in smaller cookies and reduced cache content size

06/10/2021
- use encrypted JWTs for storing encrypted cache contents and avoid using static AAD/IV; thanks @niebardzo
- bump to 2.4.9-dev

06/04/2021
- fix a problem where the host and port are calculated incorrectly, when you use literal ipv6 address.

06/02/2021
- do not send state timeout HTML document when OIDCDefaultURL is set; this can be overridden by using e.g.:
  SetEnvIfExpr true OIDC_NO_DEFAULT_URL_ON_STATE_TIMEOUT=true 
- release 2.4.8.4

06/01/2021
- avoid Apache 2.4 appending 400/302(200/404) HTML document text to state timeout HTML info page
  see also f5959d767b0eec4856d561cbaa6d2262a52da551 and #484; at least Debian Buster was affected
- release 2.4.8.3

05/18/2021
- make error "session corrupted: no issuer found in session" a warning only so a logout call for a
  non-existing session no longer produces error messages

05/08/2021
- store timestamps in session in seconds to avoid string conversion problems on some (libapr-1)
  platform build/run combinations, causing "maximum session duration exceeded" errors
- bump to 2.4.8.2

05/07/2021
- add OIDCClientTokenEndpointKeyPassword option to allow the use of an encrypted private key
- release 2.4.8.1

04/30/2021
- fix potential crash when Content-Type is not set in POST requests; thanks Tatsuhiko Yasumatsu of JPCERT/CC
- release 2.4.8

04/21/2021
- on OAuth 2.0 RS token scope/claim 401 error, add environment variable for usage with mod_headers,
  instead of adding a header ourselves; see #572; usage, e.g;
    Header always append WWW-Authenticate %{OIDC_OAUTH_BEARER_SCOPE_ERROR}e "expr=(%{REQUEST_STATUS} == 401) && (-n reqenv('OIDC_OAUTH_BEARER_SCOPE_ERROR'))"
- bump to 2.4.8-dev

04/13/2021
- add OIDCRedisCacheConnectTimeout and OIDCRedisCacheTimeout options to configure Redis timeouts
- bump to 2.4.7.2

04/12/2021
- fix memory leaks when caching fails
- bump to 2.4.7.1

04/04/2021
- improve documentation on OIDCPreservePost
- release 2.4.7

04/01/2021
- bump to 2.4.7rc1

02/16/2021
- remove session from cache before clearing it.

02/12/2021
- add maximum session lifetime (exp), inactivity timeout (timeout) and remote_user to OIDCInfoHook
- bump to 2.4.7-dev

02/08/2021
- return 400 instead of 500 when state cookie matching fails
- release 2.4.6

02/03/2021
- avoid displaying the client_secret in debug logs

01/28/2021
- avoid segmentation fault when hitting an endpoint configured with AuthType openid-connect
  in an OAuth 2.0 only setup; see #529

01/23/2021
- fix semaphore cleanup on graceful restarts; see #522

01/12/2021
- fix inconsistent public/private keys loading order; closes #515

12/17/2020
- remove support for https://tools.ietf.org/html/draft-bradley-oauth-jwt-encoded-state

12/10/2020
- add "base64url" option to OIDCPassClaimsAs primitive; closes #417

12/09/2020
- add Redis database selection option with OIDCRedisCacheDatabase; closes #423
- optimize Redis AUTH execution once per connection

12/07/2020
- don't set SameSite=None on cookies when on plain http

12/03/2020
- add environment variable to control libcURL CURLOPT_SSL_OPTIONS behaviors
  e.g.: SetEnvIfExpr true CURLOPT_SSL_OPTIONS=CURLSSLOPT_NO_REVOKE

11/23/2020
- release 2.4.5
- make sure the module compiles with Apache 2.2 for passphrase exec:
- bump to 2.4.6-dev

11/19/2020
- ensure that "sub" is returned from the userinfo endpoint following https://openid.net/specs/openid-connect-core-1_0.html#UserInfoResponse
  prevents potential ID spoofing; thanks Christian Fries of Ruhr-University Bochum
- don't printout JSON errors about NULL characters in error log; thanks Christian Fries of Ruhr-University Bochum
- restrict printout of JSON parsing errors to 4096 bytes; thanks Christian Fries of Ruhr-University Bochum
- bump to 2.4.5rc6

11/5/2020
- fix content processing for info and JWKs handler so mod_headers etc. works; closes #497
- bump to 2.4.5rc5

11/2/2020
- improve sanity checking on Redis reply
- bump to 2.4.5rc4

10/30/2020
- disable caching token introspection results by setting OIDCOAuthTokenIntrospectionInterval to -1; thanks @wadahiro
- bump to 2.4.5rc3

10/27/2020
- config check on OIDCCryptoPassphrase in OAuth 2.0 RS setup with cache encryption enabled
- bump to 2.4.5rc2

10/22/2020
- hash define expression option to OIDCUnAuthAction so it compiles for Apache 2.2; fixes 1461634
- bump to 2.4.5rc1
- add exec support to OIDCCryptoPassphrase
 
10/19/2020
- delete stale session cookies that aren't in the cache
- allow OIDCDiscoverURL to be a relative URL

10/08/2020
- add OIDCCABundlePath for configuring path to curl CA bundle

09/22/2020
- avoid Apache 2.4 appending 401 HTML document text to step-up authentication HTML refresh page; closes #484
- bump to 2.4.5rc0

09/21/2020
- populate AUTH_TYPE when performing authentication; thanks @spanglerco

09/19/2020
- enable authentication of sub-requests when the main request doesn't require
  authentication; thanks @spanglerco

09/03/2020
- add SameSite attribute on cookie clearance / logout; thanks @v0gler
- bump to 2.4.4.1

09/01/2020
- forward port Tufin patches
- always set session cookie same site policy to Lax
- disable cookie domain check
- unset host headers for metadata URL retrieval
- bump to 2.4.4-tufin

09/01/2020
- avoid GCC 9 compiler warnings
- release 2.4.4

08/28/2020
- allow Content-Type check on backchannel logout to have postfixes (utf-8 etc)
- terminate backchannel logout with DONE instead of OK to avoid authz error 500
- bump to 2.4.4rc8

08/18/2020
- add recommended cache headers on backchannel logout response
  https://openid.net/specs/openid-connect-backchannel-1_0.html#rfc.section.2.8
- bump to 2.4.4rc7

08/10/2020
- add new OIDCStateCookiePrefix primitive for the state cookie prefix

08/01/2020
- add conditional expression to OIDCUnAuthAction; see #479; thanks @raro42 and @marcstern
- bump to 2.4.4rc6

07/31/2020
- reverse order of creating HTML response and adding session cookie; thanks @deisser
- bump to 2.4.4rc5

07/30/2020
- fix doubled Set-Cookie behaviour when using `client-cookie`, calling the session info hook
  and writing out a session update (twice); thanks @deisser
- bump to 2.4.4rc4

07/27/2020
- prevent XSS and open redirect on OIDC session managemement OP iframe with OIDCRedirectURLsAllowed
  thanks Andrew Brady
- bump to 2.4.4rc3

07/22/2020
- delete state cookie when it cannot be decoded/decrypted
- bump to 2.4.4rc2

07/03/2020
- fix for loop initial declarations to not require c99 for compilation (RHEL 6)
- add ap_expr.h include in stub.c (RHEL 6)
- bump to 2.4.4rc1

06/30/2020
- add grant_types to dynamic client registration request
- don't send access_token in user info request when method is set to POST; conform OIDC test suite 4.0.5
- bump to 2.4.4rc0

06/10/2020
- prevent open redirect on refresh token requests
  add new OIDCRedirectURLsAllowed primitive to handle post logout and refresh-return-to validation
  addresses #453; closes #466
- release 2.4.3

06/09/2020
- fix complex expressions crash when compiled from source with libjq; closes #472
  thanks vincentscharf0803
  introduced by OIDCStateInputHeaders addition in 2.4.3rc0
- bump to 2.4.3rc1

05/11/2020
- added OIDCValidateIssuer to allow for disabling of issuer matching.  helps to support multi-tenant applications.

05/02/2020
- when stripping cookies, add a space between cookies in the resulting header (required by RFC 6265)
- move oidc_parse_config inside MODULE_MAGIC_NUMBER_MAJOR to make sure the module compiles with Apache 2.0

04/25/2020
- add OIDCStateInputHeaders that allows configuring the header values used to calculate the fingerprint of the state during authentication
- bump to 2.4.3rc0

03/25/2020
- oops: fix json_deep_copy of claims
- release 2.4.2.1

03/24/2020
- fix memory leak in OAuth 2.0 JWT validation; closes #470; thanks Conrad Thukral
- fix configured private/public key cleanup on process exit

03/21/2020
- allow for expressions in Require statements, see #469; thanks @wwaaron
  also see: https://github.com/zmartzone/mod_auth_openidc/wiki/Authorization#expressions-in-require-statements
- bump to 2.4.2rc5

03/19/2020
- always refresh keys from jwks_uri when there is no kid in the JWT header
- bump to 2.4.2rc4

03/15/2020
- destroy shared memory segments only in parent process; see #458
- bump to 2.4.2rc3

03/10/2020
- fix memory leaks introduced by #457
- bump to 2.4.2rc2

02/19/2020
- if content was already returned via html/http send then don't return 500
  but send 200 to avoid extraneous internal error document text to be sent
  on some Apache 2.4.x versions e.g. CentOS 7
- bump to 2.4.2rc1

02/03/2020
- if OIDCPublicKeyFiles contains a certificate, the corresponding x5c, x5t and x5t#256 
  parameters will be added to the generated jwkset available at "<redirect_uri>?jwks=rsa"
  thanks @absynth76
- fix: also add SameSite=None to by-value session cookies
- bump to 2.4.2rc0

01/30/2020
- try to fix graceful restart crash; see #458
- release 2.4.1

01/29/2020
- always add a SameSite value to the Set-Cookie header to satisfy upcoming Chrome/Firefox changes
  this can be overridden by using, e.g.:
    SetEnvIf User-Agent ".*IOS.*" OIDC_SET_COOKIE_APPEND=;
- release 2.4.1rc6

01/22/2020
- URL encode logout url in session management JS; thanks Paolo Battino
- bump to 2.4.1rc5

01/15/2020
- add value of OIDC_SET_COOKIE_APPEND env var to Set-Cookie headers
  useful for handling changing/upcoming SameSite behaviors across different browsers, e.g.:
    SetEnvIf User-Agent ".*IOS.*" OIDC_SET_COOKIE_APPEND=SameSite=None
- bump to 2.4.1rc4

01/08/2020
- support 407 option on OIDCUnAuthAction

12/09/2019
- fix parsing of values from metadata files when the default is non-NULL (e.g. UNSET)
- enforce OIDCIDTokenSignedResponseAlg and OIDCUserInfoSignedResponseAlg; see #435
- bump to 2.4.1rc2
- support login with OIDC session management; address #456
- bump to 2.4.1rc3

12/05/2019
- add the possibility to use a public key instead of a certificate for OIDCPublicKeyFiles parameter
- added an alpine dockerfile =~ 20MB container size

12/04/2019
- return 200 OK for backchannel logout if session not found
- bump to 2.4.1rc1

11/19/2019
- make cleaning of expired state cookies log with a warning rather than an error; thanks Pavel Drobov
- bump to 2.4.1rc0

10/03/2019
- improve validation of the post-logout URL parameter on logout; thanks AIMOTO Norihito; closes #449
- release 2.4.0.3
- clear any existing chunked cookies when setting a non-chunked cookie; prevents login loops in some scenarios

08/28/2019
- fixes #447 #441 : changed storing POST params from localStorage to
  sessionStorage due to some issue of losing data in localStorage in Firefox
  (private mode) 

08/22/2019
- release 2.4.0

08/16/2019
- revert 3d95b4a3fbc493c6acc745626ac33143eb4968bf: don't return early from the content handler

08/15/2019
- be smart about picking the token endpoint authentication method when not configured explicitly:
  don't choose the first one published by the OP but prefer client_secret_basic if that is listed as well
  see: panva/node-oidc-provider#514; thanks @richard-drummond and @panva
- bump to 2.4.0rc24

08/12/2019
- fix not clearing claims in session when setting claims to null; closes #445; thanks @FilipVujicic

08/12/2019
- fix JWT decryption crashing on non-null terminated input
- bump to 2.4.0rc23

08/09/2019
- add logout_on_error option to OIDCRefreshAccessTokenBeforeExpiry to kill the session when
  refreshing an access token fails; thanks @rickyepoderi
- bump to 2.4.0rc22

08/08/2019
- no longer use the fixup handler for environment variable setting but do it as part of the authn handler
- bump to 2.4.0rc21

08/04/2019
- avoid decoding non-form-encoded POST data; closes #443
- bump to 2.4.0rc20

08/02/2019
- return DONE from the content handler early to prevent triggering other content handlers
- fix `OIDCOAuthAcceptTokenAs post` so POST data is propagated and not lost; see #443
- bump to 2.4.0rc19

07/10/2019
- fix RSA JWK "x5c" parsing issue (e.g. when parsing "n" fails): explicitly set the "kid" into to JWK
- bump to 2.4.0rc18

06/19/2019
- fix regression bug that includes a HTTP 500 message after rendering content
- bump to 2.4.0rc17

06/14/2019
- fix regression bug when no per-provider keys have been configured and private_key_jwt is used
- bump to 2.4.0rc15

06/06/2019
- use per-provider signing keys in private_key_jwt authentication towards token endpoint
- bump to 2.4.0rc14

06/05/2019
- avoid passing empty key set for JWT decryption (solve but introduced in 2.4.0rc12)
- bump to 2.4.0rc13

06/03/2019
- enable per-provider signing and encryption keys; limitations:
  - for request object signing and id_token decryption only
  - take the first configured key, no kid specification
  - no publishing of key information on client endpoints
  - no userinfo JWT decryption
  - no composite claims decryption
  - no backchannel logout with encrypted logout token (inherent)
- bump to 2.4.0rc12

05/31/2019
- make sure the content handler is called for every request to the configured Redirect URI so all
  Apache processing is executed (e.g. setting headers with mod_headers) before returning the response
  thanks Don Sengpiehl (NB: this may affect browser behavior and backwards compatibility)
- add ability to view session info in HTML via the session info hook: <redirect_uri)?info=html
- bump to 2.4.0rc11

05/24/2019
- fix oidc_proto_html_post auto-post-submit so it no longer results in duplicate parentheses
  closes #440; thanks @gobreak
- bump to 2.4.0rc10

05/21/2019
- log the original URL for expired state cookies, useful for debugging SPA/JS issues

05/17/2019
- allow removing an access token from the cache ("remove_at_cache") when running in OAuth 2.0 RS mode only
- support refresh and access tokens revocation from an RFC 7009 endpoint upon OIDC session logout
- bump to 2.4.0rc9

05/03/2019
- fix (cached) parsing of OIDCOAuthServerMetadataURL; thanks Lance Fannin
- bump to 2.4.0rc5

05/02/2019
- correct caching for OIDCOAuthServerMetadataURL
- bump to 2.4.0rc4

04/21/2019
- remove option to skip scrubbing request headers (thus avoiding potentionally insecure setups)
- bump to 2.4.0rc3

04/19/2019
- add USE_URANDOM compile time option to use /dev/urandom explicitly for non-blocking random number generation
  configure with APXS2_OPTS="-DUSE_URANDOM"
- bump to 2.4.0rc2

04/15/2019
- add debug logs in oidc_proto_generate_random_string
- URL-encode client_id/client_secret when using client_secret_basic according to: https://tools.ietf.org/html/rfc6749#section-2.3.1
- bump to 2.4.0rc1

04/09/2019
- deprecate the OAuth 2.0 Resource Server functionality
- bump to 2.4.0rc0

03/13/2019
- release 2.3.11

02/26/2019
- add session expiry to session info hook response (and change inactivity timeout key)
- bump to 2.3.11rc2

02/25/2019
- add option to dynamically pass query parameters to the authorization request; closes #401
- bump to 2.3.11rc1

01/31/2019
- support conditional compilation of memcache support
- bump to 2.3.11rc0

01/22/2019
- fix XSS vulnerability CSNC-2019-001 wrt. poll parameter in OIDC Session Management RP iframe; thanks Mischa Bachmann
- release 2.3.10.2

01/16/2019
- fix bug in current URL detection where query parameters would be duplicated; see #420; thanks @jreynaert
- release 2.3.10.1

12/31/2018
- fix warning printout in oidc_delete_oldest_state_cookies
- release 2.3.10

12/16/2018
- fix encryption buffer tag length mismatch

12/06/2018
- retain the unparsed URL path in current/original URL determination, and thereby preserve
  and support URL-encoded characters in paths when redirecting back to the original URL
- add state to code exchange token requests only in multi-provider setups; see #402
- optionally delete the oldest state cookie(s); see #399
- bump to 2.3.10rc3

11/29/2018
- add support for refreshing an access token associated with an OIDC session using OIDCRefreshAccessTokenBeforeExpiry
- bump to 2.3.10rc0

11/15/2018
- release 2.3.9

11/13/2018
- fix parsing of cookie name in OIDCOAuthAcceptTokenAs when the cookie option is not listed last 
- bump to 2.3.9rc7

11/12/2018
- fix OAuth 2.0 RS config check when OIDCOAuthServerMetadataURL is set; thanks @psteniusubi
- bump to 2.3.9rc6

10/24/2018
- add support for draft https://www.ietf.org/id/draft-ietf-oauth-mtls-12.txt:
  OAuth 2.0 Mutual TLS Client Certificate Bound Access Tokens
  when running as an OAuth 2.0 RS, validating cnf["x5t#S256"] claims.
- bump to 2.3.9rc5

10/17/2018
- ignore/trim spaces in X-Forwarded-* headers
- deal with forwarding proxy setups; see #395 ; thanks @archzone
- bump to 2.3.9rc4

10/02/2018
- improve OIDC backchannel logout based on config/Discover
  - add OIDCProviderBackChannelLogoutSupported config primitive
  - parse/interpret `backchannel_logout_supported` in Discovery document
- add `id_token_token_binding_cnf`: `tbh` to dynamic client registration metadata
- bump to 2.3.9rc3

10/01/2018
- support backchannel logout according to: https://openid.net/specs/openid-connect-backchannel-1_0.html
- bump to 2.3.9rc2

10/01/2018
- add test-cmd command to generate hashes base64urlencoded inputs (cnf/tbh claims)

09/30/2018
- support Token Binding for Access Tokens according to: https://tools.ietf.org/html/draft-ietf-oauth-token-binding
- bump to 2.3.9rc1

09/16/2018
- support nested arrays in Require claim authorization evaluation; see #392; thanks @hpbieker
- bump to 2.3.9rc0

09/12/2018
- fix return result FALSE when JWT payload parsing fails; see #389; thanks @amdonov
- release 2.3.8

08/30/2018
- add LGTM code quality badges, see #385; thanks @xcorail
- fix 3 LGTM alerts

08/23/2018
- improve auto-detection of XMLHttpRequests via Accept header; see #331
- bump to 2.3.8rc5

08/15/2018
- initialize test_proto_authorization_request properly; see #382; thanks @jdennis
- add sanity check on provider->auth_request_method; closes #382; thanks @jdennis
- bump to 2.3.8rc4

08/14/2018
- allow usage with LibreSSL; closes #380; thanks @hihellobolke
- bump to 2.3.8rc3

08/04/2018
- don't return content with 503 since it will turn the HTTP status code into a 200; see #331
- bump to 2.3.8rc2

08/03/2018
- add option to set an upper limit to the number of concurrent state cookies via OIDCStateMaxNumberOfCookies; see #331
- make the default maximum number of parallel state cookies 7 instead of unlimited; see #331
- bump to 2.3.8rc1

07/30/2018
- fix using access token as endpoint auth method in introspection calls; closes #377; thanks @skauffmann

07/25/2018
- fix reading access_token form POST parameters when combined with `AuthType auth-openidc`; see #376; thanks Nicolas Salerno
- bump to 2.3.8rc0

07/06/2018
- abort when string length for remote user name substitution is larger than 255 characters
- release 2.3.7

07/04/2018
- fix Redis concurrency issue when used with multiple vhosts
- bump to 2.3.7rc4 and 2.3.7rc5

06/29/2018
- add support for authorization server metadata with OIDCOAuthServerMetadataURL as in RFC 8414
- bump to 2.3.7rc3

06/23/2018
- refactor session object creation
- bump to 2.3.7rc2

06/22/2018
- clear session cookie and contents if cache corruption is detected
- bump to 2.3.7rc0
- use apr_pstrdup when setting r->user
- reserve 255 characters in remote username substition instead of 50
- bump to 2.3.7rc1

06/15/2018
- add check to detect session cache corruption for server-based caches and cached static metadata
- release 2.3.6

05/29/2018
- avoid using pipelining for Redis
- bump to 2.3.6rc4

05/28/2018
- send Basic header in OAuth www-authenticate response if that's the only accepted method; thanks @puiterwijk

05/28/2018
- refactor Redis cache backend to solve issues on AUTH errors: a) memory leak and b) redisGetReply lagging behind
- adjust copyright year/org
- bump to 2.3.6rc3

05/23/2018
- fix buffer overflow in shm cache key set strcpy; thanks @kyprizel
- bump to 2.3.6rc2

05/22/2018
- turn missing session_state from warning into a debug statement
- fix missing "return" on error return from the OP; see #345; thanks @gergan
- bump to 2.3.6rc1

05/19/2018
- explicitly set encryption kid so we're compatible with cjose >= 0.6.0
- bump to 2.3.6rc0

05/18/2018
- fix encoding of preserved POST data; see #338; thanks @timpuri
- avoid buffer overflow in shm cache key construction; thanks @kyprizel
- release 2.3.5

05/08/2018
- compile with with Libressl; closes #358; thanks @hihellobolke
- bump to 2.3.5rc0

04/27/2018
- avoid crash when a relative logout URL parameter is passed in; thanks Vivien Delenne 
- release 2.3.4

03/22/2018
- interpret X-Forwarded-Host when doing XSRF protection on the after-logout URL; see #341; thanks @pepe79
- bump to 2.3.4rc4

02/06/2018
- add support for passing an access token in a HTTP Basic authentication password; thanks @puiterwijk
- bump to 2.3.4rc3

01/26/2018
- send session management Javascript logging to debug; thanks @kerrermanisNL

01/25/2018
- add Cache-Control no-cache header to authorization requests to avoid replays of state/nonce; see #321
- bump to 2.3.4rc2

01/23/2018
- add explicit endpoint authentication method "bearer_access_token"

12/29/2017
- correct documentation on kid usage for OIDCOAuthVerifyCertFiles; closes #318

12/21/2017
- fix compiler warnings for OpenSSL 1.1.x
- bump to 2.3.4rc1

11/21/2017
- fix bug where endpoint authentication method "private_key_jwt" would not co-exist with "none"
- bump to 2.3.4rc0

11/16/2017
- add support for passing userinfo as a JSON object or JWT; see #311
- release 2.3.3

11/13/2017
- add support for authentication to the introspection endpoint with a bearer token using OIDCOAuthIntrospectionClientAuthBearerToken; thanks @cristichiru
- bump to 2.3.3rc3

11/08/2017
- address a number of static code analysis issues
- bump to 2.3.3rc2

10/10/2017
- avoid crash when no scheme is set on OIDCProviderMetadataURL; closes #303; thanks @iconoeugen
- bump to 2.3.3rc1

10/6/2017
- avoid crash when no OIDCOAuthClientID is set for remote access token validation
- don't enforce "iat" slack checks on locally validaed JWT access tokens
- bump to 2.3.3rc0

09/18/2017
- release 2.3.2

09/11/2017
- fix "graceful" restart for shm/redis cache backends; see #296
- bump to 2.3.2rc8

09/05/2017
- optionally remove request object parameters from the authorization request URL with "copy_and_remove_from_request"; see #294
- bump to 2.3.2rc7

08/29/2017
- properly support JSON boolean values in metadata .conf files
- add regex substitution for *RemoteUserClaim; thanks @hihellobolke
- bump to 2.3.2rc6

08/27/2017
- add issuer specific redirect URI option ("issuer_specific_redirect_uri") for multi-provider setups to mitigate IDP mixup
- bump to 2.3.2rc5

08/20/2017
- fix public clients; add endpoint authentication method "none"
- bump to 2.3.2rc4

08/02/2017
- update experimental token binding support to https://tools.ietf.org/html/draft-ietf-tokbind-ttrp-01
  and use header names prefixed with "Sec-"; depends on mod_token_binding >= 0.3.4 now
- bump to 2.3.2rc3

08/01/2017
- don't abort when mutex operations fail
- printout textual descriptions of errors returned by mutex operations
- bump to 2.3.2rc2

07/28/2017
- fix issue with the combination of shared memory (shm) cache and using encryption (OIDCCacheEncrypt On)
  where the cache value would be corrupted after the first (successful) retrieval
- bump to 2.3.2rc1

07/27/2017
- support paths that are relative to the Apache root dir for:
  OIDCHTMLErrorTemplate, OIDCPublicKeyFiles, OIDCPrivateKeyFiles,
  OIDCOAuthVerifyCertFiles, OIDCClientTokenEndpointCert, OIDCClientTokenEndpointKey,
  OIDCOAuthIntrospectionEndpointCert and OIDCOAuthIntrospectionEndpointKey
- bump to 2.3.2rc0

07/19/2017
- handle multiple values in X-Forwarded-* headers as to better support chains of reverse proxies in front of mod_auth_openidc
- log request headers in oidc_util_hdr_in_get
- release 2.3.1

07/13/2017
- remove A128GCM/A192GCM from the supported algorithms in docs/auth_openidc.conf
  because cjose doesn't support A128GCM and A192GCM (yet)
- bump to 2.3.1rc5

07/09/2017
- refactor oidc_get_current_url_port so that it assumes the default port when
  X-Forwarded-Proto has been set; closes #282 and may address #278
- bump to 2.3.1rc4

07/07/2017
- use the defined name (`Provided-Token-Binding-ID`) for the provided token binding ID HTTP header
  see: https://tools.ietf.org/html/draft-campbell-tokbind-ttrp-00#section-2.1
  depends on mod_token_binding >= 0.3.0 now
- bump to 2.3.1rc3

06/29/2017
- support sending the authentication request via HTTP POST through HTML/Javascript autosubmit
- bump to 2.3.1rc2

06/28/2017
- support private_key_jwt and client_secret_jwt as client authentication methods for token introspection
- bump to 2.3.1rc1

06/22/2017
- fix bug where token_endpoint_auth set to private_key_jwt would fail to provide the credential if client_secret wasn't set
- bump to 2.3.1rc0

06/13/2017
- release 2.3.0

06/07/2017
- fix file cache backend: allow caching of non-filename friendly keys such as configuration URLs and JWKs URIs
- enable JQ-based claims expression matching when compiled from source with --with-jq=<dir>, e.g.:
  Require claims_expr '.aud == "ac_oic_client" and (.scope | index("profile") != null)'
- normalize cache backend logging
- bump to 2.3.0rc3

06/06/2017
- avoid cleaning our own state cookie twice when it is expired
- bump to 2.3.0rc2

06/02/2017
- refactor remote user handling so it allows for postfixing with the issuer value after applying the regex
- bump to 2.3.0rc1

05/31/2017
- add support for custom actions to take after authorization fails with OIDCUnAutzAction
  this enables stepup authentication scenarios when combined with the following:
- add OIDCPathAuthRequestParams that is configurable on a per-path basis and use OIDCAuthRequestParams for the static per-provider value
- add OIDCPathScope that is configurable on a per-path basis and concatenate with OIDCScope as static per-provider value
- support 3rd-party-init-SSO with additional authentication request params when a single static provider has been configured
- add support for an empty OIDCClaimPrefix; can be used with OIDCWhiteListedClaims to protect selected headers
- bump to 2.3.0rc0

05/30/2017
- support sending Authorization Request as "request" object in addition to "request_uri"; thanks @suttod
- support nested claim matching in Require directives; thanks @suttod
- support explicitly setting the "kid" of the private key in OIDCPrivateKeyFiles; thanks @suttod

05/25/2017
- fix cache fallback so it happens (when enabled) only after failure

05/19/2017
- make OIDCStripCookies work on AuthType oauth20 paths; closes #273; thanks Michele Danieli
- bump to 2.2.1rc6

05/18/2017
- fix parse function of OIDCRequestObject configuration option; thanks @suttod 

05/17/2017
- avoid crash when the X-Forwarded-Proto header is not correctly set by a reverse proxy in front of mod_auth_openidc

05/14/2017
- support JWT verification against multiple keys with no provided kid by looping over the provided keys with cjose 0.5.0
- remove OIDC RP certification files; moved to separate repository

05/04/2017
- improve documentation for OIDCCryptoPassphrase; closes #268

04/30/2017
- fix wrong return value for cache_file_set in the file cache backend (OIDCCacheType file); thanks Ernani Joppert Pontes Martins
- bump to 2.2.1rc5

04/29/2017
- correctly log success/failure in cache_file_set
- avoid decoding a JSON object and logging an error when the input is NULL
  e.g. when claims have not been resolved because userinfo endpoint is not set

04/20/2017
- support relative RedirectURIs; closes #200; thanks @moschlar
- don't assume that having OIDCCryptPassphrase set means we should validate the config for
  openid-connect since it can now also be used to encrypt (auth20) cache entries
- bump to 2.2.1rc4

04/08/2017
- fix potential crash on prefork process exit when used with Redis cache backend (3x)
- bump to 2.2.1rc3

04/06/2017
- change warn log about missing token binding ID to debug log

04/05/2017
- allow for high session inactivity timeout max value
- improve error message in oidc_util_http_send when ap_pass_brigade fails and mention possible interference with mod_deflate
- bump to 2.2.1rc0

03/30/2017
- merge feature branch back to master:
  - better support for Single Page Applications, see:
    https://github.com/zmartzone/mod_auth_openidc/wiki/Single-Page-Applications
    - add session info hook that is configurable through OIDCInfoHook
    - add "AuthType auth-openidc" option that allows both "oauth20" and "openid-connect" on the same path
  - add encryption for all cache entries instead of just session data through OIDCCacheEncrypt
  - add cookie SameSite flag/policy through OIDCCookieSameSite
  - return HTTP 200 on OPTIONS requests to (unauthenticated) "oauth20" paths
  - add fallback to a by-value session cookie if the primary session cache fails with OIDCSessionCacheFallbackToCookie
  - add support for black- and/or white-listing claims with OIDCBlackListedClaims and OIDCWhiteListedClaims
  - add prototype token binding support in conjunction with:
    https://github.com/zmartzone/mod_token_binding:
    - for state & session cookies, see:
      https://github.com/TokenBinding/Internet-Drafts
    - for ID tokens with OpenID Connect Token Bound Authentication support, see:
      http://openid.net/specs/openid-connect-token-bound-authentication-1_0.html
    - for Authorization Codes with OAuth 2.0 Token Binding for Authorization Codes, see:
       https://tools.ietf.org/html/draft-ietf-oauth-token-binding
  - refactoring:
    - refactor session state, proto state and headers into getters/setters functions
    - refactor PKCE support
  - fix removing session state from cache on logout
  - fix clearing chunked session cookies on logout; closes #246; thanks @Jharmuth
- release 2.2.0

02/20/2017
- security fix: scrub headers for "AuthType oauth20"
- release 2.1.6 

02/15/2017
- improve logging of session max duration and session inactivity timeout
- refactor so that the call to the refresh hook also resets the session inactivity timeout and passes tokens down

02/14/2017
- treat only "X-Requested-With: XMLHttpRequest" header as a non-browser client; closes #228 ; thanks @mguillem
- improve error message on state timeout; closes #226; thanks @security4java

02/09/2017
- correctly parse "kid" in OIDCPublicKeyFiles and OIDCOAuthVerifyCertFiles; thanks Alessandro Papacci
- bump to 2.1.6rc2

02/07/2017
- fix parsing of mandatory/optional attribute in OIDCOAuthTokenExpiryClaim; closes #225; thanks Alessandro Papacci
- bump to 2.1.6rc1

02/06/2017
- improve logging around the availability of session management; closes #223

02/02/2017
- interpret OIDCUnAuthAction also when the maximum session duration has been exceeded; see #220
- bump to 2.1.6rc0

01/30/2017
- security fix: scrub headers when `OIDCUnAuthAction pass` is used for an unauthenticated user
- release 2.1.5

01/29/2017
- fix error message about passing id_token with session type client-cookie; mentioned in #220
- bump to 2.1.5rc0

01/25/2017
- release 2.1.4

01/18/2017
- don't echo the query parameters on the error page when an invalid request is made to the Redirect URI; closes #212; thanks @LukasReschke

01/14/2017
- use dynamic memory buffer for writing HTTP call responses; solves curl/mpm-event interference; see #207
- bump to 2.1.4rc1

01/10/2017
- don't crash when data is POST-ed to the redirect URL, it has just 1 POST parameter and it is not "response_mode"

01/2/2017
- remove trailing linebreaks from input in test-cmd tool
- bump copyright year to 2017

12/14/2016
- support Libre SSL, see #205, thanks @AliceWonderMiscreations
- update OIDC logout support to Front-Channel Logout 1.0 draft 01: http://openid.net/specs/openid-connect-frontchannel-1_0.html
- bump to 2.1.4rc0

12/13/2016
- release 2.1.3

12/12/2016
- don't rollover session id's and keep the same session cookie name for cache storage over session updates
- bump to 2.1.3rc0

11/19/2016
- release 2.1.2

11/18/2016
- fix crash when searching for keys with a kid, there's no initial match and x5t values exist for the non-matching keys; closes #196

11/9/2016
- remove stale claims from session when refreshing them from the userinfo endpoint fails; addresses #194
- release 2.1.1

11/8/2016
- log readable error messages when memcache operations fail

11/6/2016
- fix memory leak when skipping jwks_uri keys with a non-matching "use" value

11/4/2016
- always restore id_token/claims on sub-requests so e.g. listing claims-protected subdirectories will work
- remove obsolete functions for storing the session in the request state
- bump to 2.1.1rc0

11/3/2016
- remove obsolete sessions from session cache; thanks @stevedave

11/1/2016
- release version 2.1.0

10/28/2016
- don't include encryption keys from the jwks_uri when verifying a JWT and no kid has been specified
- fix memory leaks in composite claim handling

10/27/2016
- handle aggregated and distributed claims from the userinfo endpoint
- only pick private_key_jwt token endpoint authentication if a private key is configured; closes #189
- bump to 2.0.1rc7

10/24/2016
- add OpenID Connect RP certification test script
- handle non-integer exp/iat timestamps; closes #187; thanks @drdivano

10/21/2016
- bugfix: first truncate files before writing them
- support refreshing provider metadata based on timestamp and OIDCProviderMetadataRefreshInterval

10/20/2016
- bugfix: correctly truncate encryption keys derived from client secret for algorithms that require a key size < 256 bits
- add test/test-cmd tool
- bugfix: return error on session cache failures; closes #185; thanks @solsson
- bump to 2.0.1rc6

10/18/2016
- bugfix: JWTs with a header that doesn't specify a `kid` that would not validate when used with more than 1 key; closes #184; thanks @solsson
- bump to 2.0.1rc5

10/13/2016
- urlencode provider URL cache key to fix file cache backend issue; closes #179, thanks @djahandarie

10/9/2016
- fix null pointer segfault in debug printout in oidc_util_read_form_encoded_params
- fix OIDCOAuthAcceptTokenAs parsing flaw introduced in 2.0.0rc5
- bump to 2.0.1rc4

10/2/2016
- support presenting the access token to the userinfo endpoint in a POST parameter
- bump to 2.0.1rc3

9/30/2016
- support WebFinger Discovery with URL-style user identifiers

9/28/2016
- fix memory leak in oidc_jwk_to_json
- add "remove_at_cache" hook; addresses #177
- bump to 2.0.1rc2

9/27/2016
- add support for Request URI with signed and/or encrypted Request Objects
- bump to 2.0.1rc1

9/22/2016
- refuse webfinger responses with an href value that is not on secure https
- add userinfo JWT response verification and decryption

9/20/2016
- log the JWT header before optional decryption is applied

9/19/2016
- check that a sub claim returned from the userinfo endpoint matches the one in the id_token
- fix issue in oidc_metadata_parse_url so that static default would not be honored
  - this only affected server-wide OIDCClientJwksUri usage in dynamic client registration
- non-functional changes for OIDC RP certification:
  - explicitly log the client authentication method when calling the token endpoint
  - log the keys that are included for token verification
- bump to 2.0.1rc0

9/9/2016
- fix overriding provider token endpoint auth with static config when not set in .conf file
- don't add our own cookies to the incoming headers
- allow stripping cookies from the Cookie header sent to the application/backend with OIDCStripCookies
- release 2.0.0

9/5/2016
- encapsulate (sub-)directory config handling and fix merging so values can be set back to default values in subdirs
- bump to 2.0.0rc5

9/2/2016
- fix JWK creation when no client secret is set e.g. in Implicit flows; closes #168; thanks @asc1
- bump to 2.0.0rc4

9/1/2016
- fix HTML decoding of OIDCPreservePost data; closes #165
- limit max POST data size to 1Mb
- allow chunked data in POST handling; revise handler
- change preserve POST JSON data format to urlencoded for performance reasons

8/31/2016
- allow setting the token endpoint authentication method in the .conf file (for dynamic client registration that sets the .client)

8/30/2016
- pass refresh token in header/environment variable with OIDCPassRefreshToken; thanks Amit Joshi
- fix front-channel img-style logout with newer versions of PingFederate that don't send an Accept: image/png header

8/29/2016
- preserve POST data across authentication requests and discovery with OIDCPreservePost
- bump to 2.0.0rc3

8/24/2016
- fix parsing of OIDCOAuthAcceptTokenAs to accept options following ":"
- bump to 2.0.0rc2

8/5/2016
- delete the debian directory
- rename OIDCOAuthTokenEndpointCert/Key to OIDCOAuthIntrospectionEndpointCert/Key
- pre-release 2.0.0rc1

7/30/2016
- encrypt state/session JWT cookies and session JWT cache values for non-shm storages

7/29/2016
- use cjose - https://github.com/cisco/cjose (master) - for JOSE functions
- use stricter input parsing functions for configuration values
- bump to 2.0.0rc0

7/21/2016
- support TLS client authentication to token and introspection endpoints
- bump to 1.9.0rc3

7/19/2016
- add support for chunked session cookies; closes #153; thanks @glatzert 
- bump to 1.9.0rc2

7/9/2016
- fix Elliptic Curve signature verification for corrupted input
- support OpenSSL 1.1.x
- bump to 1.9.0rc1

7/5/2016
- use AUTHZ_DENIED instead of HTTP_UNAUTHORIZED in oidc_authz_checker; closes #151; thanks @gwollman
- use signed JWTs for state/session cookies
- achieve smaller client-cookie sizes for regular cases; no id_token is stored in the session:
  - (optional) id_token_hint no longer available in session management calls (logout/prompt=none) with "OIDCSessionType client-cookie"
  - "OIDCPassIDTokenAs serialized" is not available with "OIDCSessionType client-cookie"
- bump to 1.9.0rc0

6/27/2016
- use EVP_CIPHER_CTX_new to avoid compilation errors with OpenSSL 1.1.0
- release 1.8.10

6/22/2016
- don't use local port setting for current URL determination when X-Forwarded-Host has been set
- bump to 1.8.10rc4

6/20/2016
- fix memory leak in OAuth access token introspection result caching (introduced only in 1.8.10rc0)
- fix setting private_key_jwt or client_secret_jwt with OIDCProviderTokenEndpointAuth
- bump to 1.8.10rc3

6/19/2016
- allow setting OIDCRemoteUserClaim with values obtained from the userinfo endpoint; thanks @steve-dave
- fix OIDCUnAuthAction pass mode for Apache 2.4 and in case `Require claim` primitives used for 2.4 and 2.2; thanks @steve-dave
- bump to 1.8.10rc2

6/15/2016
- add support for JWT based client authentication to the token endpoint (client_secret_jwt, private_key_jwt)
- bump to 1.8.10rc1

6/9/2016
- add per-path configurable token introspection result cache expiry with OIDCOAuthTokenIntrospectionInterval
- bump to 1.8.10rc0

6/5/2016
- release 1.8.9

5/9/2016
- support 410 option on OIDCUnAuthAction; closes #141
- bump to 1.8.9rc6

5/1/2016
- avoid segmentation fault on invalid OIDC configuration when OIDCRedirectURI is not set; fixes #138; thanks @brianwcook
- bump to 1.8.9rc5

4/18/2016
- fix get_current_url (proxy) case where r->parsed_uri.path would be null

4/13/2016
- improve X-Forwarded-Host handling over Host in a) port detection and b) remove port from host value
- bump to 1.8.9rc4

4/10/2016
- do not require OIDCClientSecret in configs; allows for Implicit grant without setting a dummy client secret; closes #130
- allow for public clients calling the token endpoint
- bump to 1.8.9rc3

4/9/2016
- ensure that claims from id_token are available for authz also when OIDCPassIDTokenAs does not contain "claims"; closes #129
- bump to 1.8.9rc2

4/3/2016
- return WWW-Authenticate header and error messages on OAuth paths where access is not granted; closes #124; thanks @spinto
- bump to 1.8.9rc1

4/1/2016
- apr_jwe_decrypt_content_aesgcm() null terminate string, #128, thanks @jdennis
- bump to 1.8.9rc0

3/10/2016
- release 1.8.8

3/7/2016
- issue a warning if the "openid" scope is not requested

3/6/2016
- sanitize the OIDCAuthNHeader value before setting the header; thanks @rfk
- bump to 1.8.8rc7

3/5/2016
- log exact version of OpenSSL and EC/GCM/Redis support
- tidy up auth_openidc.conf docs
- bump to 1.8.8rc6

2/26/2016
- add option to refresh claims from the userinfo endpoint using OIDCUserInfoRefreshInterval; see #119
- merge id_token claims in to the set of claims used for authorization for Apache >=2.4; see #120
- bump to 1.8.8rc5

2/23/2016
- make state cookie a session cookie and clean expired cookies on entry (merge of fix-firefox-cookie-storage)
- fix HTML error template initialization in vhosts
- bump to 1.8.8rc4

2/22/2016
- don't authenticate (redirect/state) when X-Requested-With header exists; as suggested in #113
- bump to 1.8.8rc3

2/18/2016
- pass plain state to the token endpoint on code flows: https://tools.ietf.org/html/draft-jones-oauth-mix-up-mitigation-01
- fix loose (prefix-only) matching of cookie names
- allow passing OAuth bearer token as a cookie (OIDCOAuthAcceptTokenAs extension for PingAccess)
- bump to 1.8.8rc2

2/11/2016
- include token_endpoint_auth_method in dynamic client registration request, set to selected method from provider

2/10/2016
- Elliptic Curve support now requires OpenSSL 1.0.1 detection
- bump to 1.8.8rc1

1/14/2016
- add support for passing in OAuth bearer tokens as one or more of: header, post param or query param (OIDCOAuthAcceptTokenAs)
- bump to 1.8.8rc0

1/8/2016
- release 1.8.7

1/7/2016
- update copyright year

12/17/2015
- enforce strict matching of issuer in Discovery document against the originally requested issuer
- check iss/client_id if present in an authentication response
- push a hash of state to the token endpoint on code flows
- bump to 1.8.7rc4

12/9/2015
- improve debug logging around session management capabilities (i.e. enabled/disabled)
- return 404 for op/rp iframes if session management is not enabled
- bump to 1.8.7rc3

12/4/2015
- add support for RFC 7636 PKCE plain & S256 https://tools.ietf.org/html/rfc7636
- bump to 1.8.7rc2

12/3/2015
- fix crash when using a custom error template and the error description is NULL
- fix crash when target_link_uri is not a valid URI or parts are empty
- fix memory corruption when using custom html template across different server requests; closes #106
- bump to 1.8.7rc1

11/18/2015
- fix compiler warning on double sizeof call; close #103; thanks to @dcb314
- bump to 1.8.7rc0

10/26/2015
- add option to make session cookie persistent; closes #97
- release 1.8.6

10/19/2015
- add support for applying a custom HTML error template with OIDCHTMLErrorTemplate
- bump to 1.8.6rc3

10/12/2015
- check the cookie domain that the session was created for against the configured domain
- log a warning if the Set-Cookie value length is greater than 4093 bytes
- include and prioritize the X-Forwarded-Host header in hostname determination
- allow for missing Host header i.e. HTTP 1.0
- return DONE instead of HTTP_UNAUTHORIZED with Discovery page (prevent double HTML in HTTP 1.0)
- use apr_strnatcmp instead of strcmp in util.c and mod_auth_openidc.c
- bump to 1.8.6rc2

10/9/2015
- support subdomain cookies in OIDCCookieDomain checks; PR #96, thanks @pfiled
- bump to 1.8.6rc1

10/6/2015
- add key identifier ("kid") option to `OIDCOAuthVerifySharedKeys`, `OIDCOAuthVerifyCertFiles` and `OIDCPublicKeyFiles` configs
- bump to 1.8.6rc0

9/21/2015
- support (non-sid-based) HTTP logout: http://openid.net/specs/openid-connect-logout-1_0.html
- release 1.8.5

9/16/2015
- improve logging on provider/client/conf metadata parsing failures; closes #94
- bump to 1.8.5rc7

9/9/2015
- fix parsing of OIDCOAuthTokenExpiryClaim, thanks to @bester #90
- bump to 1.8.5rc6

9/4/2015
- add CSRF protection to external Discovery as well
- allow browser back after authorization response, see #89
- handle invalid (expired) authorization response state by sending the user to OIDCDefaultURL, see #86
- bump to 1.8.5rc5

8/26/2015
- add CSRF protection to Discovery
- bump to 1.8.5rc4

8/19/2015
- support encrypted JWTs using A192KW for key encryption and A192CBC-HS384 for content encryption
- bump to 1.8.5rc3

8/15/2015
- support encrypted JWTs using RSA-OAEP for key encryption and A128GCM,A192GCM,A256GCM for content encryption
- bump to 1.8.5rc2

8/4/2015
- support for OIDCUnAuthAction: how to act on unauthenticated requests (OIDCReturn401 is deprecated)
- bump to 1.8.5rc1

7/15/2015
- add authentication option for Redis server with OIDCRedisCachePassword
- bump to 1.8.5rc0

7/3/2015
- allow for compilation on Windows using VS 2013
- bump to 1.8.4

6/30/2015
- improve memcache logging: don't report cache misses as an error, thanks to @scottdear
- work around JSON timestamp print modifier issue (%lld) on some platforms, thanks to @ralphvanetten
- bump to 1.8.4rc3

6/24/2015
- support passing claims as environment variables (OIDCPassClaimsAs)
- bump to 1.8.4rc1

6/22/2015
- correct debug printout in oidc_util_read_form_encoded_params

6/20/2015
- avoid double free of JWT after parsing errors have been encountered
- bump to 1.8.4rc0

6/19/2015
- make public keys for encrypted access tokens available in OAuth-only configurations; fixes #74
- remove exceptions for accounts.google.com since Google is OpenID Connect compliant now
- release 1.8.3

6/15/2015
- add a complete JWT sample that includes validation of "exp" and "iat" to the test suite

6/10/2015
- allow JSON string values for the "active" claim in access token validation responses
- bump to 1.8.3rc4

6/7/2015
- improve error logging on non-supported JWT signing/encryption algorithms
- bump to 1.8.3rc3

5/31/2015
- merge id_token ("iss"!) and user info claims for authz processing
- bump to 1.8.3rc2

5/29/2015
- fix hash comparison when padded, thanks to @steverc as mentioned in #65
- fix post-logout URL being set to SSO URL
- add post-logout URL validation, thanks to @davidbernick
- bump to 1.8.3rc1

5/18/2015
- fix OpenSSL version detection for Elliptic Curve support in apr_jwt_signature_to_jwk_type: include opensslv.h
- fix hash length calculation for Elliptic Curve algorithms
- release 1.8.2

5/5/2015
- release 1.8.1

4/21/2015
- allow setting OIDCDiscoverURL inside of Directory and Location directives as well
- bump to 1.8.1rc5

4/20/2015
- allow setting OIDCCookie outside of Directory and Location directives as well
- bump to 1.8.1rc4

4/17/2015
- add support for applying regular expressions to OIDCRemoteUserClaim and OIDCOAuthRemoteUserClaim
- bump to 1.8.1rc3

4/12/2015
- make token expiry parsing of introspection result configurable (OIDCOAuthTokenExpiryClaim)
- increase SHM cache key size from 255 to 512 (allows for JWT access tokens cache keys for introspection result)
- bump to 1.8.1rc2

4/1/2015
- avoid timing attacks on symmetric key signature/hash comparisons as pointed out by @timmclean
- bump to 1.8.1rc1

3/19/2015
- merge #57: fix build with OpenSSL <1.0 re. apr_jws_signature_is_ec (thanks to @szakharchenko)

2/26/2015
- release 1.8.0

2/23/2015
- avoid including line feeds in header values (thanks to @forkbomber and @ekanthi)
- bump to 1.8.0rc5

2/16/2015
- fix free() crash on simple-valued error printouts
- fix returning keys without a "kid"
- fix searching for keys with a "x5t" thumbprint
- refactor response type handling; more strict matching of requested response type
- make compiled in Redis support optional
- fix oauth.introspection_endpoint_method in initialization
- bump to 1.8.0rc4

2/15/2015
- add support for configurable introspection HTTP method (OIDCOAuthIntrospectionEndpointMethod)
- add preliminary support for GET-style logout
- bump to 1.8.0rc2

2/12/2015
- add support for configuration of maximum session duration
- bump to 1.8.0rc1

2/9/2015
- check JWT signature against all configured keys (jwks_uri) if no "kid" is provided, not just the first one
- revise JOSE JWS handling part 2
- complete support for local JWT access token validation
- bump to 1.8.0rc0

2/5/2015
- fix symmetric key decryption of JWTs (A128CBC-HS256/A256CBC-HS512)
- sha256 client secrets before using them as symmetric keys for decryption
- extended decryption test coverage; avoid double printouts on error
- refactor JWT header parsing
- simplify JWK URI refresh handling
- release 1.7.3

2/4/2015
- revise JOSE JWK handling part 1
- change change target_uri parameter name to target_link_uri following draft-bradley-oauth-jwt-encoded-state-03
- extended tests with stubs
- refactor JWT validation (iss, exp, iat)
- fix memory leak with RSA key conversion in apr_jwk.c - apr_jwk_rsa_bio_to_key
- bump to 1.7.3rc4

1/25/2015
- Allow {... "error": null ...} in JSON responses. (@fatlotus)

1/22/2015
- fix configuration validation check where no config would be checked if OIDCProviderIssuer is set
  but both OIDRedirectURI and OIDCCryptoPassphrase are not set
- add preliminary support for local JWT access token validation
- bump to 1.7.3rc1
- sanitize set cookie syntax (get rid of extraneous ";")

1/21/2015
- add support for OIDCOAuthIntrospectionTokenParamName (incl. Google OAuth 2.0 access token validation)
- add a sample OAuth 2.0 config for Google access tokens to README.md
- release 1.7.2

- add APXS2_OPTS to configure.ac to accommodate RPM builds
- bump to 1.7.3rc0
- fix JWT timestamp (iat/exp) initialization issue
- fix README.md on Google's scope required for returning the "hd" claim

1/14/2015
- add Apache function stubs to enable extending the scope of tests
- add tests for oidc_proto_validate_access_token and oidc_proto_validate_code
- bump to 1.7.2rc3

1/12/2015
- improve accuracy of expired/invalid session handling

1/11/2015
- add error type and return values to JOSE functions
- fix return result on error in function that decrypts CEK
- bump to 1.7.2rc2

1/1/2015
- update copyright to 2015
- use json_int_t (seconds) for "exp" and "iat" fields, instead of apr_time_t (microseconds) 
- correct expiry debug printout
- bump to 1.7.2rc1

12/15/2014
- fix Redis reconnect behavior: avoid keep reconnecting after first failure
- bump to 1.7.2rc0

12/12/2014
- support passing cookies specified in OIDCPassCookies from browser on to OP/AS calls (for loadbalancing purposes)
- release 1.7.1
- document OIDCPassCookies in auth_openidc.conf

12/10/2014
- reconnect to the Redis server after I/O failure as raised in #43
- bump to 1.7.1rc4

12/8/2014
- return http 500 when detecting requests that will loop on return
- bump to 1.7.1rc3

12/3/2014
- require the expiring access_token on the refresh hook for XSRF protection
- pass error codes back to the caller when the refresh hook fails
- bump to 1.7.1rc2

12/2/2014
- improve handling of non-string (=non-compliant) error responses

11/26/2014
- make shared memory cache entry max size configurable through OIDCCacheShmEntrySizeMax
- add OIDCReturn401 configuration primitive
- bump to 1.7.1rc1

11/11/2014
- allow OIDCRedirectURI's with an empty path and fix crash; thanks to @CedricCabessa

11/9/2014
- support for adding configurable JSON parameters to Dynamic Client Registration requests

11/5/2014
- release 1.7.0

10/30/2014
- correct expires_in conversion
- first stab at HTML templating and make all html HTML 4.01 Strict compliant
- bump to 1.7.0rc4

10/29/2014
- document refresh flow

10/28/2014
- scrub all OIDC_ headers
- add support for the refresh_token flow + hook
- pass the expires_in as an absolute timestamp in OIDC_access_token_expires
- use a global mutex for the Redis cache
- bump to 1.7.0rc3

10/27/2014
- generalize support for OAuth 2.0 token introspection and conform to:
  https://tools.ietf.org/html/draft-ietf-oauth-introspection-00

10/26/2014
- support regular expressions in Require statements

10/24/2014
- add support for Redis cache backend; there's a dependency on hiredis headers/library now

10/21/2014
- refactor nonce generation and remove base64url padding from value

10/13/2014
- add libssl-dev to Debian control build dependencies
- release 1.6.0

10/6/2014
- apply html encoding to error display
- bump version number to 1.6.0rc4

10/2/2014
- avoid crash when downloading metadata from OIDCProviderMetadataURL fails
- set OIDCProviderMetadataURL retrieval interval to 24 hours
- return error on configurations mixing OIDCProviderMetadataURL and OIDCMetadataDir
- bump version number to 1.6.0rc3

10/1/2014
- support provider configuration from a metadata URL (OIDCProviderMetadataURL)
- bump version number to 1.6.0rc2

9/30/2014
- be less strict about issuer validation in metadata
- refactor metadata.c
- improve logging about userinfo endpoint

9/29/2014
- refactor cache so it is partitioned in to sections (i.e. avoid future key collisions)

9/25/2014
- add support for "x5c" JWK representation
- return JWKS on jwks_uri with content-type "application/json"

9/17/2014
- remove support for the X-Frame-Options as it is not needed in 302s
- create and use log macros that printout function name

9/16/2014
- support for passing runtime determined authentication request parameters in the discovery response
- include name/version in logs and bump to 1.6.0rc1
- don't use the X-Frame-Options by default

9/13/2014
- add support for the X-Frame-Options header as recommended by the spec

9/12/2014
- set expiry on state cookies; don't clear session cookie after cache miss or corruption
- fix JSON array memory leak in oauth.c

9/10/2014
- merge #34 (g10f), fix session management Javascript bug

9/3/2014
- improve error handling on hitting the redirect URI directly
- fix set_slot functions for algorithm/url used as default for dynamic registration
- rewording of auth_openidc.conf docs on JWK settings

9/1/2014
- add session management based on http://openid.net/specs/openid-connect-session-1_0.html (draft 21)

8/29/2014
- add configuration option to POST extra parameters to the token endpoint

8/26/2014
- correct cookie_path comparison
- release 1.5.5

8/20/2014
- correctly error out on flows where no id_token was provided ("token")

8/19/2014
- fix debug printout on open redirect prevention
- cleanup in-memory crypto context on shutdown
- use default of "/" for OIDCCookiePath to simplify quickstart/simple deployments
- disable OIDCMetadataDir in sample/default config file
- clear session cookie after cache miss or corruption

8/18/2014
- add HttpOnly flag to cookies by default; can be disabled by config

8/14/2014
- support for passing the id_token in multiple formats (claims|payload|serialized)
- release 1.5.4

8/13/2014
- pass the access_token in OIDC_access_token header to the application

8/9/2014
- merge #21 (Latinovic) to close #18 (big endian JWE issue)
- merge #20 (wadahiro), support for "none" JWT signing algorithm

8/1/2014
- fix cache initialization/destroy leak
- release 1.5.3

7/26/2014
- refactor http code; cleanup JSON encoding in client registration
- refactor padding handling in base64url encoding/decoding

7/20/2014
- check for open redirect on passed target_link_uri
- prevent JWE timing attacks on CEK; add JWE test
- include client_id and scope values in resolved access_token

7/1/2014
- pass JSON objects in app HTTP headers as plain JSON
- correct printout in id_token hash comparisons
- add more tests
- release 1.5.2

6/12/2014
- support third-party-initiated login as defined in the spec
- release 1.5.1
- fix PF OAuth 2.0 RS functionality after upgrading to jansson

6/6/2014
- more changes for Debian packaging (1.5-3)

6/5/2014
- do not set Secure cookies for plain HTTP
- add warning/errors when configured hosts/domains do not match
- release 1.5
- changes for Debian packaging

6/4/2014
- fix passing integer claims on non-Mac OS X systems
- fix claims-based authorization with integer values (@martinsrom)
- fix getting the id_token from request state and error logging
- add AUTHORS file with credits
- migrate README to Markdown README.md

6/3/2014
- change JSON parser from https://github.com/moriyoshi/apr-json to http://www.digip.org/jansson/

6/2/2014
- handle X-Forwarded-Proto/X-Forwarded-Port when running behind a proxy/load-balancer
- release version 1.4

6/1/2014
- compile with OpenSSL <1.0 and but then disable Elliptic Curve verification
- fix jwks_uri setting in nested vhosts
- use OpenSSL_add_all_digests in initialization and EVP_cleanup on shutdown

5/31/2014
- README additions/improvements

5/29/2014
- correct big endian detection
- allow for key identification in JWKs based on thumbprint (x5t)

5/24/2014
- add cache destroy function and destroy shm cache resources on shutdown

5/23/2014
- doc corrections to auth_openidc.conf

5/22/2014
- add implementation of OP-initiated-SSO based on:
  http://tools.ietf.org/html/draft-bradley-oauth-jwt-encoded-state-01
- fix nonce caching for replay prevention

5/21/2014
- correct README on enabling Google+ APIs before applying the sample Google configs
- fix AuthNHeader setting and allow server-wide config too
- avoid segfault on corrupted/non- JSON/JWT input

5/20/2014
- fix URL assembly when running on non-standard port
- release 1.3

5/17/2014
- support outgoing proxy using OIDCOutgoingProxy
- correct sample configs in documentation for missing OIDCCookiePath
- support OIDCCookiePath in server-wide config as well

5/13/2014
- support configurable (custom) query parameters in the authorization request

5/12/2014
- support encrypted JWTs using A128KW and A256KW for the Content Encryption Key
- support A256CBC-HS512 encrypted JWTs
- support custom client JWKs URI

5/8/2014
- support encrypted JWTs using RSA1_5 and A128CBC-HS256

5/2/2014
- do not use ap_get_remote_host for browser fingerprinting

5/1/2014
- split out custom client config into separate <issuer>.conf file
- allow to override client_contact, client_name and registration_token in .conf file
- remove OIDCRegistrationToken command for the static OP config

4/29/2014
- support JWT verification of ES256, ES384 and ES512 algorithms

4/28/2014
- support configurable response_mode (fragment, query or form_post)
- use nonce in all flows except for OP Google and flows "code" or "code token"

4/26/2014
- make client secret optional (support self-issued OP)

4/25/2014
- support Hybrid flows

4/24/2014
- fix using Bearer token Authorization header on JSON POST calls
- support using a Bearer token on client registration calls

4/22/2014
- match request and response type 
- check at_hash value on "token id_token" implicit flow
- use shared memory caching by default
- release 1.2

4/19/2014
- store response_type in state and make state a JSON object

4/18/2014
- support RSASSA-PSS token signing algorithms (PS256,PS384,PS512)

4/17/2014
- improve session inactivity timeout handling

4/16/2014
- set REMOTE_USER and HTTP headers on OAuth 2.0 protected paths

4/15/2014
- add session inactivity timeout
- register all supported response_types during client registration and try
  to pick the one that matches the configured default
- use long timeouts on JWK retrieval calls
- allow for non-null but empty query parameters on implicit authorization response
- simplify azp/aud and nonce handling
- change session_type naming (to "server-cache"/"client-cookie")

4/14/2014
- factor out JOSE related code

4/3/2014
- add configurable claim name for the REMOTE_USER variable, optionally postfixed with the  url-encoded
  issuer value; the default for the remote username is "sub@" now, makeing it unique across OPs
- some refactoring of id_token validation functions
- add INSTALL, move auth_openidc.conf to main directory
- release 1.1

3/28/2014
- fix Require claim name mismatch for Apache 2.4
- fix hmac method/printout naming artifacts from earlier
auto-search-and-replace
- release v1.0.1

3/27/2014
- initial import named mod_auth_openidc
- updated README
- fix debian/changelog


Fixed version (ground truth):
06/25/2021
- avoid XSS vulnerability when using OIDCPreservePost On and supplying URLs that contain single quotes
  thanks @oss-aimoto

06/21/2021
- strip A256GCM JWT header from encrypted JWTS used for state cookies, cache encryption and by-value session cookies
  resulting in smaller cookies and reduced cache content size

06/10/2021
- use encrypted JWTs for storing encrypted cache contents and avoid using static AAD/IV; thanks @niebardzo
- bump to 2.4.9-dev

06/04/2021
- fix a problem where the host and port are calculated incorrectly, when you use literal ipv6 address.

06/02/2021
- do not send state timeout HTML document when OIDCDefaultURL is set; this can be overridden by using e.g.:
  SetEnvIfExpr true OIDC_NO_DEFAULT_URL_ON_STATE_TIMEOUT=true 
- release 2.4.8.4

06/01/2021
- avoid Apache 2.4 appending 400/302(200/404) HTML document text to state timeout HTML info page
  see also f5959d767b0eec4856d561cbaa6d2262a52da551 and #484; at least Debian Buster was affected
- release 2.4.8.3

05/18/2021
- make error "session corrupted: no issuer found in session" a warning only so a logout call for a
  non-existing session no longer produces error messages

05/08/2021
- store timestamps in session in seconds to avoid string conversion problems on some (libapr-1)
  platform build/run combinations, causing "maximum session duration exceeded" errors
- bump to 2.4.8.2

05/07/2021
- add OIDCClientTokenEndpointKeyPassword option to allow the use of an encrypted private key
- release 2.4.8.1

04/30/2021
- fix potential crash when Content-Type is not set in POST requests; thanks Tatsuhiko Yasumatsu of JPCERT/CC
- release 2.4.8

04/21/2021
- on OAuth 2.0 RS token scope/claim 401 error, add environment variable for usage with mod_headers,
  instead of adding a header ourselves; see #572; usage, e.g;
    Header always append WWW-Authenticate %{OIDC_OAUTH_BEARER_SCOPE_ERROR}e "expr=(%{REQUEST_STATUS} == 401) && (-n reqenv('OIDC_OAUTH_BEARER_SCOPE_ERROR'))"
- bump to 2.4.8-dev

04/13/2021
- add OIDCRedisCacheConnectTimeout and OIDCRedisCacheTimeout options to configure Redis timeouts
- bump to 2.4.7.2

04/12/2021
- fix memory leaks when caching fails
- bump to 2.4.7.1

04/04/2021
- improve documentation on OIDCPreservePost
- release 2.4.7

04/01/2021
- bump to 2.4.7rc1

02/16/2021
- remove session from cache before clearing it.

02/12/2021
- add maximum session lifetime (exp), inactivity timeout (timeout) and remote_user to OIDCInfoHook
- bump to 2.4.7-dev

02/08/2021
- return 400 instead of 500 when state cookie matching fails
- release 2.4.6

02/03/2021
- avoid displaying the client_secret in debug logs

01/28/2021
- avoid segmentation fault when hitting an endpoint configured with AuthType openid-connect
  in an OAuth 2.0 only setup; see #529

01/23/2021
- fix semaphore cleanup on graceful restarts; see #522

01/12/2021
- fix inconsistent public/private keys loading order; closes #515

12/17/2020
- remove support for https://tools.ietf.org/html/draft-bradley-oauth-jwt-encoded-state

12/10/2020
- add "base64url" option to OIDCPassClaimsAs primitive; closes #417

12/09/2020
- add Redis database selection option with OIDCRedisCacheDatabase; closes #423
- optimize Redis AUTH execution once per connection

12/07/2020
- don't set SameSite=None on cookies when on plain http

12/03/2020
- add environment variable to control libcURL CURLOPT_SSL_OPTIONS behaviors
  e.g.: SetEnvIfExpr true CURLOPT_SSL_OPTIONS=CURLSSLOPT_NO_REVOKE

11/23/2020
- release 2.4.5
- make sure the module compiles with Apache 2.2 for passphrase exec:
- bump to 2.4.6-dev

11/19/2020
- ensure that "sub" is returned from the userinfo endpoint following https://openid.net/specs/openid-connect-core-1_0.html#UserInfoResponse
  prevents potential ID spoofing; thanks Christian Fries of Ruhr-University Bochum
- don't printout JSON errors about NULL characters in error log; thanks Christian Fries of Ruhr-University Bochum
- restrict printout of JSON parsing errors to 4096 bytes; thanks Christian Fries of Ruhr-University Bochum
- bump to 2.4.5rc6

11/5/2020
- fix content processing for info and JWKs handler so mod_headers etc. works; closes #497
- bump to 2.4.5rc5

11/2/2020
- improve sanity checking on Redis reply
- bump to 2.4.5rc4

10/30/2020
- disable caching token introspection results by setting OIDCOAuthTokenIntrospectionInterval to -1; thanks @wadahiro
- bump to 2.4.5rc3

10/27/2020
- config check on OIDCCryptoPassphrase in OAuth 2.0 RS setup with cache encryption enabled
- bump to 2.4.5rc2

10/22/2020
- hash define expression option to OIDCUnAuthAction so it compiles for Apache 2.2; fixes 1461634
- bump to 2.4.5rc1
- add exec support to OIDCCryptoPassphrase
 
10/19/2020
- delete stale session cookies that aren't in the cache
- allow OIDCDiscoverURL to be a relative URL

10/08/2020
- add OIDCCABundlePath for configuring path to curl CA bundle

09/22/2020
- avoid Apache 2.4 appending 401 HTML document text to step-up authentication HTML refresh page; closes #484
- bump to 2.4.5rc0

09/21/2020
- populate AUTH_TYPE when performing authentication; thanks @spanglerco

09/19/2020
- enable authentication of sub-requests when the main request doesn't require
  authentication; thanks @spanglerco

09/03/2020
- add SameSite attribute on cookie clearance / logout; thanks @v0gler
- bump to 2.4.4.1

09/01/2020
- forward port Tufin patches
- always set session cookie same site policy to Lax
- disable cookie domain check
- unset host headers for metadata URL retrieval
- bump to 2.4.4-tufin

09/01/2020
- avoid GCC 9 compiler warnings
- release 2.4.4

08/28/2020
- allow Content-Type check on backchannel logout to have postfixes (utf-8 etc)
- terminate backchannel logout with DONE instead of OK to avoid authz error 500
- bump to 2.4.4rc8

08/18/2020
- add recommended cache headers on backchannel logout response
  https://openid.net/specs/openid-connect-backchannel-1_0.html#rfc.section.2.8
- bump to 2.4.4rc7

08/10/2020
- add new OIDCStateCookiePrefix primitive for the state cookie prefix

08/01/2020
- add conditional expression to OIDCUnAuthAction; see #479; thanks @raro42 and @marcstern
- bump to 2.4.4rc6

07/31/2020
- reverse order of creating HTML response and adding session cookie; thanks @deisser
- bump to 2.4.4rc5

07/30/2020
- fix doubled Set-Cookie behaviour when using `client-cookie`, calling the session info hook
  and writing out a session update (twice); thanks @deisser
- bump to 2.4.4rc4

07/27/2020
- prevent XSS and open redirect on OIDC session managemement OP iframe with OIDCRedirectURLsAllowed
  thanks Andrew Brady
- bump to 2.4.4rc3

07/22/2020
- delete state cookie when it cannot be decoded/decrypted
- bump to 2.4.4rc2

07/03/2020
- fix for loop initial declarations to not require c99 for compilation (RHEL 6)
- add ap_expr.h include in stub.c (RHEL 6)
- bump to 2.4.4rc1

06/30/2020
- add grant_types to dynamic client registration request
- don't send access_token in user info request when method is set to POST; conform OIDC test suite 4.0.5
- bump to 2.4.4rc0

06/10/2020
- prevent open redirect on refresh token requests
  add new OIDCRedirectURLsAllowed primitive to handle post logout and refresh-return-to validation
  addresses #453; closes #466
- release 2.4.3

06/09/2020
- fix complex expressions crash when compiled from source with libjq; closes #472
  thanks vincentscharf0803
  introduced by OIDCStateInputHeaders addition in 2.4.3rc0
- bump to 2.4.3rc1

05/11/2020
- added OIDCValidateIssuer to allow for disabling of issuer matching.  helps to support multi-tenant applications.

05/02/2020
- when stripping cookies, add a space between cookies in the resulting header (required by RFC 6265)
- move oidc_parse_config inside MODULE_MAGIC_NUMBER_MAJOR to make sure the module compiles with Apache 2.0

04/25/2020
- add OIDCStateInputHeaders that allows configuring the header values used to calculate the fingerprint of the state during authentication
- bump to 2.4.3rc0

03/25/2020
- oops: fix json_deep_copy of claims
- release 2.4.2.1

03/24/2020
- fix memory leak in OAuth 2.0 JWT validation; closes #470; thanks Conrad Thukral
- fix configured private/public key cleanup on process exit

03/21/2020
- allow for expressions in Require statements, see #469; thanks @wwaaron
  also see: https://github.com/zmartzone/mod_auth_openidc/wiki/Authorization#expressions-in-require-statements
- bump to 2.4.2rc5

03/19/2020
- always refresh keys from jwks_uri when there is no kid in the JWT header
- bump to 2.4.2rc4

03/15/2020
- destroy shared memory segments only in parent process; see #458
- bump to 2.4.2rc3

03/10/2020
- fix memory leaks introduced by #457
- bump to 2.4.2rc2

02/19/2020
- if content was already returned via html/http send then don't return 500
  but send 200 to avoid extraneous internal error document text to be sent
  on some Apache 2.4.x versions e.g. CentOS 7
- bump to 2.4.2rc1

02/03/2020
- if OIDCPublicKeyFiles contains a certificate, the corresponding x5c, x5t and x5t#256 
  parameters will be added to the generated jwkset available at "<redirect_uri>?jwks=rsa"
  thanks @absynth76
- fix: also add SameSite=None to by-value session cookies
- bump to 2.4.2rc0

01/30/2020
- try to fix graceful restart crash; see #458
- release 2.4.1

01/29/2020
- always add a SameSite value to the Set-Cookie header to satisfy upcoming Chrome/Firefox changes
  this can be overridden by using, e.g.:
    SetEnvIf User-Agent ".*IOS.*" OIDC_SET_COOKIE_APPEND=;
- release 2.4.1rc6

01/22/2020
- URL encode logout url in session management JS; thanks Paolo Battino
- bump to 2.4.1rc5

01/15/2020
- add value of OIDC_SET_COOKIE_APPEND env var to Set-Cookie headers
  useful for handling changing/upcoming SameSite behaviors across different browsers, e.g.:
    SetEnvIf User-Agent ".*IOS.*" OIDC_SET_COOKIE_APPEND=SameSite=None
- bump to 2.4.1rc4

01/08/2020
- support 407 option on OIDCUnAuthAction

12/09/2019
- fix parsing of values from metadata files when the default is non-NULL (e.g. UNSET)
- enforce OIDCIDTokenSignedResponseAlg and OIDCUserInfoSignedResponseAlg; see #435
- bump to 2.4.1rc2
- support login with OIDC session management; address #456
- bump to 2.4.1rc3

12/05/2019
- add the possibility to use a public key instead of a certificate for OIDCPublicKeyFiles parameter
- added an alpine dockerfile =~ 20MB container size

12/04/2019
- return 200 OK for backchannel logout if session not found
- bump to 2.4.1rc1

11/19/2019
- make cleaning of expired state cookies log with a warning rather than an error; thanks Pavel Drobov
- bump to 2.4.1rc0

10/03/2019
- improve validation of the post-logout URL parameter on logout; thanks AIMOTO Norihito; closes #449
- release 2.4.0.3
- clear any existing chunked cookies when setting a non-chunked cookie; prevents login loops in some scenarios

08/28/2019
- fixes #447 #441 : changed storing POST params from localStorage to
  sessionStorage due to some issue of losing data in localStorage in Firefox
  (private mode) 

08/22/2019
- release 2.4.0

08/16/2019
- revert 3d95b4a3fbc493c6acc745626ac33143eb4968bf: don't return early from the content handler

08/15/2019
- be smart about picking the token endpoint authentication method when not configured explicitly:
  don't choose the first one published by the OP but prefer client_secret_basic if that is listed as well
  see: panva/node-oidc-provider#514; thanks @richard-drummond and @panva
- bump to 2.4.0rc24

08/12/2019
- fix not clearing claims in session when setting claims to null; closes #445; thanks @FilipVujicic

08/12/2019
- fix JWT decryption crashing on non-null terminated input
- bump to 2.4.0rc23

08/09/2019
- add logout_on_error option to OIDCRefreshAccessTokenBeforeExpiry to kill the session when
  refreshing an access token fails; thanks @rickyepoderi
- bump to 2.4.0rc22

08/08/2019
- no longer use the fixup handler for environment variable setting but do it as part of the authn handler
- bump to 2.4.0rc21

08/04/2019
- avoid decoding non-form-encoded POST data; closes #443
- bump to 2.4.0rc20

08/02/2019
- return DONE from the content handler early to prevent triggering other content handlers
- fix `OIDCOAuthAcceptTokenAs post` so POST data is propagated and not lost; see #443
- bump to 2.4.0rc19

07/10/2019
- fix RSA JWK "x5c" parsing issue (e.g. when parsing "n" fails): explicitly set the "kid" into to JWK
- bump to 2.4.0rc18

06/19/2019
- fix regression bug that includes a HTTP 500 message after rendering content
- bump to 2.4.0rc17

06/14/2019
- fix regression bug when no per-provider keys have been configured and private_key_jwt is used
- bump to 2.4.0rc15

06/06/2019
- use per-provider signing keys in private_key_jwt authentication towards token endpoint
- bump to 2.4.0rc14

06/05/2019
- avoid passing empty key set for JWT decryption (solve but introduced in 2.4.0rc12)
- bump to 2.4.0rc13

06/03/2019
- enable per-provider signing and encryption keys; limitations:
  - for request object signing and id_token decryption only
  - take the first configured key, no kid specification
  - no publishing of key information on client endpoints
  - no userinfo JWT decryption
  - no composite claims decryption
  - no backchannel logout with encrypted logout token (inherent)
- bump to 2.4.0rc12

05/31/2019
- make sure the content handler is called for every request to the configured Redirect URI so all
  Apache processing is executed (e.g. setting headers with mod_headers) before returning the response
  thanks Don Sengpiehl (NB: this may affect browser behavior and backwards compatibility)
- add ability to view session info in HTML via the session info hook: <redirect_uri)?info=html
- bump to 2.4.0rc11

05/24/2019
- fix oidc_proto_html_post auto-post-submit so it no longer results in duplicate parentheses
  closes #440; thanks @gobreak
- bump to 2.4.0rc10

05/21/2019
- log the original URL for expired state cookies, useful for debugging SPA/JS issues

05/17/2019
- allow removing an access token from the cache ("remove_at_cache") when running in OAuth 2.0 RS mode only
- support refresh and access tokens revocation from an RFC 7009 endpoint upon OIDC session logout
- bump to 2.4.0rc9

05/03/2019
- fix (cached) parsing of OIDCOAuthServerMetadataURL; thanks Lance Fannin
- bump to 2.4.0rc5

05/02/2019
- correct caching for OIDCOAuthServerMetadataURL
- bump to 2.4.0rc4

04/21/2019
- remove option to skip scrubbing request headers (thus avoiding potentionally insecure setups)
- bump to 2.4.0rc3

04/19/2019
- add USE_URANDOM compile time option to use /dev/urandom explicitly for non-blocking random number generation
  configure with APXS2_OPTS="-DUSE_URANDOM"
- bump to 2.4.0rc2

04/15/2019
- add debug logs in oidc_proto_generate_random_string
- URL-encode client_id/client_secret when using client_secret_basic according to: https://tools.ietf.org/html/rfc6749#section-2.3.1
- bump to 2.4.0rc1

04/09/2019
- deprecate the OAuth 2.0 Resource Server functionality
- bump to 2.4.0rc0

03/13/2019
- release 2.3.11

02/26/2019
- add session expiry to session info hook response (and change inactivity timeout key)
- bump to 2.3.11rc2

02/25/2019
- add option to dynamically pass query parameters to the authorization request; closes #401
- bump to 2.3.11rc1

01/31/2019
- support conditional compilation of memcache support
- bump to 2.3.11rc0

01/22/2019
- fix XSS vulnerability CSNC-2019-001 wrt. poll parameter in OIDC Session Management RP iframe; thanks Mischa Bachmann
- release 2.3.10.2

01/16/2019
- fix bug in current URL detection where query parameters would be duplicated; see #420; thanks @jreynaert
- release 2.3.10.1

12/31/2018
- fix warning printout in oidc_delete_oldest_state_cookies
- release 2.3.10

12/16/2018
- fix encryption buffer tag length mismatch

12/06/2018
- retain the unparsed URL path in current/original URL determination, and thereby preserve
  and support URL-encoded characters in paths when redirecting back to the original URL
- add state to code exchange token requests only in multi-provider setups; see #402
- optionally delete the oldest state cookie(s); see #399
- bump to 2.3.10rc3

11/29/2018
- add support for refreshing an access token associated with an OIDC session using OIDCRefreshAccessTokenBeforeExpiry
- bump to 2.3.10rc0

11/15/2018
- release 2.3.9

11/13/2018
- fix parsing of cookie name in OIDCOAuthAcceptTokenAs when the cookie option is not listed last 
- bump to 2.3.9rc7

11/12/2018
- fix OAuth 2.0 RS config check when OIDCOAuthServerMetadataURL is set; thanks @psteniusubi
- bump to 2.3.9rc6

10/24/2018
- add support for draft https://www.ietf.org/id/draft-ietf-oauth-mtls-12.txt:
  OAuth 2.0 Mutual TLS Client Certificate Bound Access Tokens
  when running as an OAuth 2.0 RS, validating cnf["x5t#S256"] claims.
- bump to 2.3.9rc5

10/17/2018
- ignore/trim spaces in X-Forwarded-* headers
- deal with forwarding proxy setups; see #395 ; thanks @archzone
- bump to 2.3.9rc4

10/02/2018
- improve OIDC backchannel logout based on config/Discover
  - add OIDCProviderBackChannelLogoutSupported config primitive
  - parse/interpret `backchannel_logout_supported` in Discovery document
- add `id_token_token_binding_cnf`: `tbh` to dynamic client registration metadata
- bump to 2.3.9rc3

10/01/2018
- support backchannel logout according to: https://openid.net/specs/openid-connect-backchannel-1_0.html
- bump to 2.3.9rc2

10/01/2018
- add test-cmd command to generate hashes base64urlencoded inputs (cnf/tbh claims)

09/30/2018
- support Token Binding for Access Tokens according to: https://tools.ietf.org/html/draft-ietf-oauth-token-binding
- bump to 2.3.9rc1

09/16/2018
- support nested arrays in Require claim authorization evaluation; see #392; thanks @hpbieker
- bump to 2.3.9rc0

09/12/2018
- fix return result FALSE when JWT payload parsing fails; see #389; thanks @amdonov
- release 2.3.8

08/30/2018
- add LGTM code quality badges, see #385; thanks @xcorail
- fix 3 LGTM alerts

08/23/2018
- improve auto-detection of XMLHttpRequests via Accept header; see #331
- bump to 2.3.8rc5

08/15/2018
- initialize test_proto_authorization_request properly; see #382; thanks @jdennis
- add sanity check on provider->auth_request_method; closes #382; thanks @jdennis
- bump to 2.3.8rc4

08/14/2018
- allow usage with LibreSSL; closes #380; thanks @hihellobolke
- bump to 2.3.8rc3

08/04/2018
- don't return content with 503 since it will turn the HTTP status code into a 200; see #331
- bump to 2.3.8rc2

08/03/2018
- add option to set an upper limit to the number of concurrent state cookies via OIDCStateMaxNumberOfCookies; see #331
- make the default maximum number of parallel state cookies 7 instead of unlimited; see #331
- bump to 2.3.8rc1

07/30/2018
- fix using access token as endpoint auth method in introspection calls; closes #377; thanks @skauffmann

07/25/2018
- fix reading access_token form POST parameters when combined with `AuthType auth-openidc`; see #376; thanks Nicolas Salerno
- bump to 2.3.8rc0

07/06/2018
- abort when string length for remote user name substitution is larger than 255 characters
- release 2.3.7

07/04/2018
- fix Redis concurrency issue when used with multiple vhosts
- bump to 2.3.7rc4 and 2.3.7rc5

06/29/2018
- add support for authorization server metadata with OIDCOAuthServerMetadataURL as in RFC 8414
- bump to 2.3.7rc3

06/23/2018
- refactor session object creation
- bump to 2.3.7rc2

06/22/2018
- clear session cookie and contents if cache corruption is detected
- bump to 2.3.7rc0
- use apr_pstrdup when setting r->user
- reserve 255 characters in remote username substition instead of 50
- bump to 2.3.7rc1

06/15/2018
- add check to detect session cache corruption for server-based caches and cached static metadata
- release 2.3.6

05/29/2018
- avoid using pipelining for Redis
- bump to 2.3.6rc4

05/28/2018
- send Basic header in OAuth www-authenticate response if that's the only accepted method; thanks @puiterwijk

05/28/2018
- refactor Redis cache backend to solve issues on AUTH errors: a) memory leak and b) redisGetReply lagging behind
- adjust copyright year/org
- bump to 2.3.6rc3

05/23/2018
- fix buffer overflow in shm cache key set strcpy; thanks @kyprizel
- bump to 2.3.6rc2

05/22/2018
- turn missing session_state from warning into a debug statement
- fix missing "return" on error return from the OP; see #345; thanks @gergan
- bump to 2.3.6rc1

05/19/2018
- explicitly set encryption kid so we're compatible with cjose >= 0.6.0
- bump to 2.3.6rc0

05/18/2018
- fix encoding of preserved POST data; see #338; thanks @timpuri
- avoid buffer overflow in shm cache key construction; thanks @kyprizel
- release 2.3.5

05/08/2018
- compile with with Libressl; closes #358; thanks @hihellobolke
- bump to 2.3.5rc0

04/27/2018
- avoid crash when a relative logout URL parameter is passed in; thanks Vivien Delenne 
- release 2.3.4

03/22/2018
- interpret X-Forwarded-Host when doing XSRF protection on the after-logout URL; see #341; thanks @pepe79
- bump to 2.3.4rc4

02/06/2018
- add support for passing an access token in a HTTP Basic authentication password; thanks @puiterwijk
- bump to 2.3.4rc3

01/26/2018
- send session management Javascript logging to debug; thanks @kerrermanisNL

01/25/2018
- add Cache-Control no-cache header to authorization requests to avoid replays of state/nonce; see #321
- bump to 2.3.4rc2

01/23/2018
- add explicit endpoint authentication method "bearer_access_token"

12/29/2017
- correct documentation on kid usage for OIDCOAuthVerifyCertFiles; closes #318

12/21/2017
- fix compiler warnings for OpenSSL 1.1.x
- bump to 2.3.4rc1

11/21/2017
- fix bug where endpoint authentication method "private_key_jwt" would not co-exist with "none"
- bump to 2.3.4rc0

11/16/2017
- add support for passing userinfo as a JSON object or JWT; see #311
- release 2.3.3

11/13/2017
- add support for authentication to the introspection endpoint with a bearer token using OIDCOAuthIntrospectionClientAuthBearerToken; thanks @cristichiru
- bump to 2.3.3rc3

11/08/2017
- address a number of static code analysis issues
- bump to 2.3.3rc2

10/10/2017
- avoid crash when no scheme is set on OIDCProviderMetadataURL; closes #303; thanks @iconoeugen
- bump to 2.3.3rc1

10/6/2017
- avoid crash when no OIDCOAuthClientID is set for remote access token validation
- don't enforce "iat" slack checks on locally validaed JWT access tokens
- bump to 2.3.3rc0

09/18/2017
- release 2.3.2

09/11/2017
- fix "graceful" restart for shm/redis cache backends; see #296
- bump to 2.3.2rc8

09/05/2017
- optionally remove request object parameters from the authorization request URL with "copy_and_remove_from_request"; see #294
- bump to 2.3.2rc7

08/29/2017
- properly support JSON boolean values in metadata .conf files
- add regex substitution for *RemoteUserClaim; thanks @hihellobolke
- bump to 2.3.2rc6

08/27/2017
- add issuer specific redirect URI option ("issuer_specific_redirect_uri") for multi-provider setups to mitigate IDP mixup
- bump to 2.3.2rc5

08/20/2017
- fix public clients; add endpoint authentication method "none"
- bump to 2.3.2rc4

08/02/2017
- update experimental token binding support to https://tools.ietf.org/html/draft-ietf-tokbind-ttrp-01
  and use header names prefixed with "Sec-"; depends on mod_token_binding >= 0.3.4 now
- bump to 2.3.2rc3

08/01/2017
- don't abort when mutex operations fail
- printout textual descriptions of errors returned by mutex operations
- bump to 2.3.2rc2

07/28/2017
- fix issue with the combination of shared memory (shm) cache and using encryption (OIDCCacheEncrypt On)
  where the cache value would be corrupted after the first (successful) retrieval
- bump to 2.3.2rc1

07/27/2017
- support paths that are relative to the Apache root dir for:
  OIDCHTMLErrorTemplate, OIDCPublicKeyFiles, OIDCPrivateKeyFiles,
  OIDCOAuthVerifyCertFiles, OIDCClientTokenEndpointCert, OIDCClientTokenEndpointKey,
  OIDCOAuthIntrospectionEndpointCert and OIDCOAuthIntrospectionEndpointKey
- bump to 2.3.2rc0

07/19/2017
- handle multiple values in X-Forwarded-* headers as to better support chains of reverse proxies in front of mod_auth_openidc
- log request headers in oidc_util_hdr_in_get
- release 2.3.1

07/13/2017
- remove A128GCM/A192GCM from the supported algorithms in docs/auth_openidc.conf
  because cjose doesn't support A128GCM and A192GCM (yet)
- bump to 2.3.1rc5

07/09/2017
- refactor oidc_get_current_url_port so that it assumes the default port when
  X-Forwarded-Proto has been set; closes #282 and may address #278
- bump to 2.3.1rc4

07/07/2017
- use the defined name (`Provided-Token-Binding-ID`) for the provided token binding ID HTTP header
  see: https://tools.ietf.org/html/draft-campbell-tokbind-ttrp-00#section-2.1
  depends on mod_token_binding >= 0.3.0 now
- bump to 2.3.1rc3

06/29/2017
- support sending the authentication request via HTTP POST through HTML/Javascript autosubmit
- bump to 2.3.1rc2

06/28/2017
- support private_key_jwt and client_secret_jwt as client authentication methods for token introspection
- bump to 2.3.1rc1

06/22/2017
- fix bug where token_endpoint_auth set to private_key_jwt would fail to provide the credential if client_secret wasn't set
- bump to 2.3.1rc0

06/13/2017
- release 2.3.0

06/07/2017
- fix file cache backend: allow caching of non-filename friendly keys such as configuration URLs and JWKs URIs
- enable JQ-based claims expression matching when compiled from source with --with-jq=<dir>, e.g.:
  Require claims_expr '.aud == "ac_oic_client" and (.scope | index("profile") != null)'
- normalize cache backend logging
- bump to 2.3.0rc3

06/06/2017
- avoid cleaning our own state cookie twice when it is expired
- bump to 2.3.0rc2

06/02/2017
- refactor remote user handling so it allows for postfixing with the issuer value after applying the regex
- bump to 2.3.0rc1

05/31/2017
- add support for custom actions to take after authorization fails with OIDCUnAutzAction
  this enables stepup authentication scenarios when combined with the following:
- add OIDCPathAuthRequestParams that is configurable on a per-path basis and use OIDCAuthRequestParams for the static per-provider value
- add OIDCPathScope that is configurable on a per-path basis and concatenate with OIDCScope as static per-provider value
- support 3rd-party-init-SSO with additional authentication request params when a single static provider has been configured
- add support for an empty OIDCClaimPrefix; can be used with OIDCWhiteListedClaims to protect selected headers
- bump to 2.3.0rc0

05/30/2017
- support sending Authorization Request as "request" object in addition to "request_uri"; thanks @suttod
- support nested claim matching in Require directives; thanks @suttod
- support explicitly setting the "kid" of the private key in OIDCPrivateKeyFiles; thanks @suttod

05/25/2017
- fix cache fallback so it happens (when enabled) only after failure

05/19/2017
- make OIDCStripCookies work on AuthType oauth20 paths; closes #273; thanks Michele Danieli
- bump to 2.2.1rc6

05/18/2017
- fix parse function of OIDCRequestObject configuration option; thanks @suttod 

05/17/2017
- avoid crash when the X-Forwarded-Proto header is not correctly set by a reverse proxy in front of mod_auth_openidc

05/14/2017
- support JWT verification against multiple keys with no provided kid by looping over the provided keys with cjose 0.5.0
- remove OIDC RP certification files; moved to separate repository

05/04/2017
- improve documentation for OIDCCryptoPassphrase; closes #268

04/30/2017
- fix wrong return value for cache_file_set in the file cache backend (OIDCCacheType file); thanks Ernani Joppert Pontes Martins
- bump to 2.2.1rc5

04/29/2017
- correctly log success/failure in cache_file_set
- avoid decoding a JSON object and logging an error when the input is NULL
  e.g. when claims have not been resolved because userinfo endpoint is not set

04/20/2017
- support relative RedirectURIs; closes #200; thanks @moschlar
- don't assume that having OIDCCryptPassphrase set means we should validate the config for
  openid-connect since it can now also be used to encrypt (auth20) cache entries
- bump to 2.2.1rc4

04/08/2017
- fix potential crash on prefork process exit when used with Redis cache backend (3x)
- bump to 2.2.1rc3

04/06/2017
- change warn log about missing token binding ID to debug log

04/05/2017
- allow for high session inactivity timeout max value
- improve error message in oidc_util_http_send when ap_pass_brigade fails and mention possible interference with mod_deflate
- bump to 2.2.1rc0

03/30/2017
- merge feature branch back to master:
  - better support for Single Page Applications, see:
    https://github.com/zmartzone/mod_auth_openidc/wiki/Single-Page-Applications
    - add session info hook that is configurable through OIDCInfoHook
    - add "AuthType auth-openidc" option that allows both "oauth20" and "openid-connect" on the same path
  - add encryption for all cache entries instead of just session data through OIDCCacheEncrypt
  - add cookie SameSite flag/policy through OIDCCookieSameSite
  - return HTTP 200 on OPTIONS requests to (unauthenticated) "oauth20" paths
  - add fallback to a by-value session cookie if the primary session cache fails with OIDCSessionCacheFallbackToCookie
  - add support for black- and/or white-listing claims with OIDCBlackListedClaims and OIDCWhiteListedClaims
  - add prototype token binding support in conjunction with:
    https://github.com/zmartzone/mod_token_binding:
    - for state & session cookies, see:
      https://github.com/TokenBinding/Internet-Drafts
    - for ID tokens with OpenID Connect Token Bound Authentication support, see:
      http://openid.net/specs/openid-connect-token-bound-authentication-1_0.html
    - for Authorization Codes with OAuth 2.0 Token Binding for Authorization Codes, see:
       https://tools.ietf.org/html/draft-ietf-oauth-token-binding
  - refactoring:
    - refactor session state, proto state and headers into getters/setters functions
    - refactor PKCE support
  - fix removing session state from cache on logout
  - fix clearing chunked session cookies on logout; closes #246; thanks @Jharmuth
- release 2.2.0

02/20/2017
- security fix: scrub headers for "AuthType oauth20"
- release 2.1.6 

02/15/2017
- improve logging of session max duration and session inactivity timeout
- refactor so that the call to the refresh hook also resets the session inactivity timeout and passes tokens down

02/14/2017
- treat only "X-Requested-With: XMLHttpRequest" header as a non-browser client; closes #228 ; thanks @mguillem
- improve error message on state timeout; closes #226; thanks @security4java

02/09/2017
- correctly parse "kid" in OIDCPublicKeyFiles and OIDCOAuthVerifyCertFiles; thanks Alessandro Papacci
- bump to 2.1.6rc2

02/07/2017
- fix parsing of mandatory/optional attribute in OIDCOAuthTokenExpiryClaim; closes #225; thanks Alessandro Papacci
- bump to 2.1.6rc1

02/06/2017
- improve logging around the availability of session management; closes #223

02/02/2017
- interpret OIDCUnAuthAction also when the maximum session duration has been exceeded; see #220
- bump to 2.1.6rc0

01/30/2017
- security fix: scrub headers when `OIDCUnAuthAction pass` is used for an unauthenticated user
- release 2.1.5

01/29/2017
- fix error message about passing id_token with session type client-cookie; mentioned in #220
- bump to 2.1.5rc0

01/25/2017
- release 2.1.4

01/18/2017
- don't echo the query parameters on the error page when an invalid request is made to the Redirect URI; closes #212; thanks @LukasReschke

01/14/2017
- use dynamic memory buffer for writing HTTP call responses; solves curl/mpm-event interference; see #207
- bump to 2.1.4rc1

01/10/2017
- don't crash when data is POST-ed to the redirect URL, it has just 1 POST parameter and it is not "response_mode"

01/2/2017
- remove trailing linebreaks from input in test-cmd tool
- bump copyright year to 2017

12/14/2016
- support Libre SSL, see #205, thanks @AliceWonderMiscreations
- update OIDC logout support to Front-Channel Logout 1.0 draft 01: http://openid.net/specs/openid-connect-frontchannel-1_0.html
- bump to 2.1.4rc0

12/13/2016
- release 2.1.3

12/12/2016
- don't rollover session id's and keep the same session cookie name for cache storage over session updates
- bump to 2.1.3rc0

11/19/2016
- release 2.1.2

11/18/2016
- fix crash when searching for keys with a kid, there's no initial match and x5t values exist for the non-matching keys; closes #196

11/9/2016
- remove stale claims from session when refreshing them from the userinfo endpoint fails; addresses #194
- release 2.1.1

11/8/2016
- log readable error messages when memcache operations fail

11/6/2016
- fix memory leak when skipping jwks_uri keys with a non-matching "use" value

11/4/2016
- always restore id_token/claims on sub-requests so e.g. listing claims-protected subdirectories will work
- remove obsolete functions for storing the session in the request state
- bump to 2.1.1rc0

11/3/2016
- remove obsolete sessions from session cache; thanks @stevedave

11/1/2016
- release version 2.1.0

10/28/2016
- don't include encryption keys from the jwks_uri when verifying a JWT and no kid has been specified
- fix memory leaks in composite claim handling

10/27/2016
- handle aggregated and distributed claims from the userinfo endpoint
- only pick private_key_jwt token endpoint authentication if a private key is configured; closes #189
- bump to 2.0.1rc7

10/24/2016
- add OpenID Connect RP certification test script
- handle non-integer exp/iat timestamps; closes #187; thanks @drdivano

10/21/2016
- bugfix: first truncate files before writing them
- support refreshing provider metadata based on timestamp and OIDCProviderMetadataRefreshInterval

10/20/2016
- bugfix: correctly truncate encryption keys derived from client secret for algorithms that require a key size < 256 bits
- add test/test-cmd tool
- bugfix: return error on session cache failures; closes #185; thanks @solsson
- bump to 2.0.1rc6

10/18/2016
- bugfix: JWTs with a header that doesn't specify a `kid` that would not validate when used with more than 1 key; closes #184; thanks @solsson
- bump to 2.0.1rc5

10/13/2016
- urlencode provider URL cache key to fix file cache backend issue; closes #179, thanks @djahandarie

10/9/2016
- fix null pointer segfault in debug printout in oidc_util_read_form_encoded_params
- fix OIDCOAuthAcceptTokenAs parsing flaw introduced in 2.0.0rc5
- bump to 2.0.1rc4

10/2/2016
- support presenting the access token to the userinfo endpoint in a POST parameter
- bump to 2.0.1rc3

9/30/2016
- support WebFinger Discovery with URL-style user identifiers

9/28/2016
- fix memory leak in oidc_jwk_to_json
- add "remove_at_cache" hook; addresses #177
- bump to 2.0.1rc2

9/27/2016
- add support for Request URI with signed and/or encrypted Request Objects
- bump to 2.0.1rc1

9/22/2016
- refuse webfinger responses with an href value that is not on secure https
- add userinfo JWT response verification and decryption

9/20/2016
- log the JWT header before optional decryption is applied

9/19/2016
- check that a sub claim returned from the userinfo endpoint matches the one in the id_token
- fix issue in oidc_metadata_parse_url so that static default would not be honored
  - this only affected server-wide OIDCClientJwksUri usage in dynamic client registration
- non-functional changes for OIDC RP certification:
  - explicitly log the client authentication method when calling the token endpoint
  - log the keys that are included for token verification
- bump to 2.0.1rc0

9/9/2016
- fix overriding provider token endpoint auth with static config when not set in .conf file
- don't add our own cookies to the incoming headers
- allow stripping cookies from the Cookie header sent to the application/backend with OIDCStripCookies
- release 2.0.0

9/5/2016
- encapsulate (sub-)directory config handling and fix merging so values can be set back to default values in subdirs
- bump to 2.0.0rc5

9/2/2016
- fix JWK creation when no client secret is set e.g. in Implicit flows; closes #168; thanks @asc1
- bump to 2.0.0rc4

9/1/2016
- fix HTML decoding of OIDCPreservePost data; closes #165
- limit max POST data size to 1Mb
- allow chunked data in POST handling; revise handler
- change preserve POST JSON data format to urlencoded for performance reasons

8/31/2016
- allow setting the token endpoint authentication method in the .conf file (for dynamic client registration that sets the .client)

8/30/2016
- pass refresh token in header/environment variable with OIDCPassRefreshToken; thanks Amit Joshi
- fix front-channel img-style logout with newer versions of PingFederate that don't send an Accept: image/png header

8/29/2016
- preserve POST data across authentication requests and discovery with OIDCPreservePost
- bump to 2.0.0rc3

8/24/2016
- fix parsing of OIDCOAuthAcceptTokenAs to accept options following ":"
- bump to 2.0.0rc2

8/5/2016
- delete the debian directory
- rename OIDCOAuthTokenEndpointCert/Key to OIDCOAuthIntrospectionEndpointCert/Key
- pre-release 2.0.0rc1

7/30/2016
- encrypt state/session JWT cookies and session JWT cache values for non-shm storages

7/29/2016
- use cjose - https://github.com/cisco/cjose (master) - for JOSE functions
- use stricter input parsing functions for configuration values
- bump to 2.0.0rc0

7/21/2016
- support TLS client authentication to token and introspection endpoints
- bump to 1.9.0rc3

7/19/2016
- add support for chunked session cookies; closes #153; thanks @glatzert 
- bump to 1.9.0rc2

7/9/2016
- fix Elliptic Curve signature verification for corrupted input
- support OpenSSL 1.1.x
- bump to 1.9.0rc1

7/5/2016
- use AUTHZ_DENIED instead of HTTP_UNAUTHORIZED in oidc_authz_checker; closes #151; thanks @gwollman
- use signed JWTs for state/session cookies
- achieve smaller client-cookie sizes for regular cases; no id_token is stored in the session:
  - (optional) id_token_hint no longer available in session management calls (logout/prompt=none) with "OIDCSessionType client-cookie"
  - "OIDCPassIDTokenAs serialized" is not available with "OIDCSessionType client-cookie"
- bump to 1.9.0rc0

6/27/2016
- use EVP_CIPHER_CTX_new to avoid compilation errors with OpenSSL 1.1.0
- release 1.8.10

6/22/2016
- don't use local port setting for current URL determination when X-Forwarded-Host has been set
- bump to 1.8.10rc4

6/20/2016
- fix memory leak in OAuth access token introspection result caching (introduced only in 1.8.10rc0)
- fix setting private_key_jwt or client_secret_jwt with OIDCProviderTokenEndpointAuth
- bump to 1.8.10rc3

6/19/2016
- allow setting OIDCRemoteUserClaim with values obtained from the userinfo endpoint; thanks @steve-dave
- fix OIDCUnAuthAction pass mode for Apache 2.4 and in case `Require claim` primitives used for 2.4 and 2.2; thanks @steve-dave
- bump to 1.8.10rc2

6/15/2016
- add support for JWT based client authentication to the token endpoint (client_secret_jwt, private_key_jwt)
- bump to 1.8.10rc1

6/9/2016
- add per-path configurable token introspection result cache expiry with OIDCOAuthTokenIntrospectionInterval
- bump to 1.8.10rc0

6/5/2016
- release 1.8.9

5/9/2016
- support 410 option on OIDCUnAuthAction; closes #141
- bump to 1.8.9rc6

5/1/2016
- avoid segmentation fault on invalid OIDC configuration when OIDCRedirectURI is not set; fixes #138; thanks @brianwcook
- bump to 1.8.9rc5

4/18/2016
- fix get_current_url (proxy) case where r->parsed_uri.path would be null

4/13/2016
- improve X-Forwarded-Host handling over Host in a) port detection and b) remove port from host value
- bump to 1.8.9rc4

4/10/2016
- do not require OIDCClientSecret in configs; allows for Implicit grant without setting a dummy client secret; closes #130
- allow for public clients calling the token endpoint
- bump to 1.8.9rc3

4/9/2016
- ensure that claims from id_token are available for authz also when OIDCPassIDTokenAs does not contain "claims"; closes #129
- bump to 1.8.9rc2

4/3/2016
- return WWW-Authenticate header and error messages on OAuth paths where access is not granted; closes #124; thanks @spinto
- bump to 1.8.9rc1

4/1/2016
- apr_jwe_decrypt_content_aesgcm() null terminate string, #128, thanks @jdennis
- bump to 1.8.9rc0

3/10/2016
- release 1.8.8

3/7/2016
- issue a warning if the "openid" scope is not requested

3/6/2016
- sanitize the OIDCAuthNHeader value before setting the header; thanks @rfk
- bump to 1.8.8rc7

3/5/2016
- log exact version of OpenSSL and EC/GCM/Redis support
- tidy up auth_openidc.conf docs
- bump to 1.8.8rc6

2/26/2016
- add option to refresh claims from the userinfo endpoint using OIDCUserInfoRefreshInterval; see #119
- merge id_token claims in to the set of claims used for authorization for Apache >=2.4; see #120
- bump to 1.8.8rc5

2/23/2016
- make state cookie a session cookie and clean expired cookies on entry (merge of fix-firefox-cookie-storage)
- fix HTML error template initialization in vhosts
- bump to 1.8.8rc4

2/22/2016
- don't authenticate (redirect/state) when X-Requested-With header exists; as suggested in #113
- bump to 1.8.8rc3

2/18/2016
- pass plain state to the token endpoint on code flows: https://tools.ietf.org/html/draft-jones-oauth-mix-up-mitigation-01
- fix loose (prefix-only) matching of cookie names
- allow passing OAuth bearer token as a cookie (OIDCOAuthAcceptTokenAs extension for PingAccess)
- bump to 1.8.8rc2

2/11/2016
- include token_endpoint_auth_method in dynamic client registration request, set to selected method from provider

2/10/2016
- Elliptic Curve support now requires OpenSSL 1.0.1 detection
- bump to 1.8.8rc1

1/14/2016
- add support for passing in OAuth bearer tokens as one or more of: header, post param or query param (OIDCOAuthAcceptTokenAs)
- bump to 1.8.8rc0

1/8/2016
- release 1.8.7

1/7/2016
- update copyright year

12/17/2015
- enforce strict matching of issuer in Discovery document against the originally requested issuer
- check iss/client_id if present in an authentication response
- push a hash of state to the token endpoint on code flows
- bump to 1.8.7rc4

12/9/2015
- improve debug logging around session management capabilities (i.e. enabled/disabled)
- return 404 for op/rp iframes if session management is not enabled
- bump to 1.8.7rc3

12/4/2015
- add support for RFC 7636 PKCE plain & S256 https://tools.ietf.org/html/rfc7636
- bump to 1.8.7rc2

12/3/2015
- fix crash when using a custom error template and the error description is NULL
- fix crash when target_link_uri is not a valid URI or parts are empty
- fix memory corruption when using custom html template across different server requests; closes #106
- bump to 1.8.7rc1

11/18/2015
- fix compiler warning on double sizeof call; close #103; thanks to @dcb314
- bump to 1.8.7rc0

10/26/2015
- add option to make session cookie persistent; closes #97
- release 1.8.6

10/19/2015
- add support for applying a custom HTML error template with OIDCHTMLErrorTemplate
- bump to 1.8.6rc3

10/12/2015
- check the cookie domain that the session was created for against the configured domain
- log a warning if the Set-Cookie value length is greater than 4093 bytes
- include and prioritize the X-Forwarded-Host header in hostname determination
- allow for missing Host header i.e. HTTP 1.0
- return DONE instead of HTTP_UNAUTHORIZED with Discovery page (prevent double HTML in HTTP 1.0)
- use apr_strnatcmp instead of strcmp in util.c and mod_auth_openidc.c
- bump to 1.8.6rc2

10/9/2015
- support subdomain cookies in OIDCCookieDomain checks; PR #96, thanks @pfiled
- bump to 1.8.6rc1

10/6/2015
- add key identifier ("kid") option to `OIDCOAuthVerifySharedKeys`, `OIDCOAuthVerifyCertFiles` and `OIDCPublicKeyFiles` configs
- bump to 1.8.6rc0

9/21/2015
- support (non-sid-based) HTTP logout: http://openid.net/specs/openid-connect-logout-1_0.html
- release 1.8.5

9/16/2015
- improve logging on provider/client/conf metadata parsing failures; closes #94
- bump to 1.8.5rc7

9/9/2015
- fix parsing of OIDCOAuthTokenExpiryClaim, thanks to @bester #90
- bump to 1.8.5rc6

9/4/2015
- add CSRF protection to external Discovery as well
- allow browser back after authorization response, see #89
- handle invalid (expired) authorization response state by sending the user to OIDCDefaultURL, see #86
- bump to 1.8.5rc5

8/26/2015
- add CSRF protection to Discovery
- bump to 1.8.5rc4

8/19/2015
- support encrypted JWTs using A192KW for key encryption and A192CBC-HS384 for content encryption
- bump to 1.8.5rc3

8/15/2015
- support encrypted JWTs using RSA-OAEP for key encryption and A128GCM,A192GCM,A256GCM for content encryption
- bump to 1.8.5rc2

8/4/2015
- support for OIDCUnAuthAction: how to act on unauthenticated requests (OIDCReturn401 is deprecated)
- bump to 1.8.5rc1

7/15/2015
- add authentication option for Redis server with OIDCRedisCachePassword
- bump to 1.8.5rc0

7/3/2015
- allow for compilation on Windows using VS 2013
- bump to 1.8.4

6/30/2015
- improve memcache logging: don't report cache misses as an error, thanks to @scottdear
- work around JSON timestamp print modifier issue (%lld) on some platforms, thanks to @ralphvanetten
- bump to 1.8.4rc3

6/24/2015
- support passing claims as environment variables (OIDCPassClaimsAs)
- bump to 1.8.4rc1

6/22/2015
- correct debug printout in oidc_util_read_form_encoded_params

6/20/2015
- avoid double free of JWT after parsing errors have been encountered
- bump to 1.8.4rc0

6/19/2015
- make public keys for encrypted access tokens available in OAuth-only configurations; fixes #74
- remove exceptions for accounts.google.com since Google is OpenID Connect compliant now
- release 1.8.3

6/15/2015
- add a complete JWT sample that includes validation of "exp" and "iat" to the test suite

6/10/2015
- allow JSON string values for the "active" claim in access token validation responses
- bump to 1.8.3rc4

6/7/2015
- improve error logging on non-supported JWT signing/encryption algorithms
- bump to 1.8.3rc3

5/31/2015
- merge id_token ("iss"!) and user info claims for authz processing
- bump to 1.8.3rc2

5/29/2015
- fix hash comparison when padded, thanks to @steverc as mentioned in #65
- fix post-logout URL being set to SSO URL
- add post-logout URL validation, thanks to @davidbernick
- bump to 1.8.3rc1

5/18/2015
- fix OpenSSL version detection for Elliptic Curve support in apr_jwt_signature_to_jwk_type: include opensslv.h
- fix hash length calculation for Elliptic Curve algorithms
- release 1.8.2

5/5/2015
- release 1.8.1

4/21/2015
- allow setting OIDCDiscoverURL inside of Directory and Location directives as well
- bump to 1.8.1rc5

4/20/2015
- allow setting OIDCCookie outside of Directory and Location directives as well
- bump to 1.8.1rc4

4/17/2015
- add support for applying regular expressions to OIDCRemoteUserClaim and OIDCOAuthRemoteUserClaim
- bump to 1.8.1rc3

4/12/2015
- make token expiry parsing of introspection result configurable (OIDCOAuthTokenExpiryClaim)
- increase SHM cache key size from 255 to 512 (allows for JWT access tokens cache keys for introspection result)
- bump to 1.8.1rc2

4/1/2015
- avoid timing attacks on symmetric key signature/hash comparisons as pointed out by @timmclean
- bump to 1.8.1rc1

3/19/2015
- merge #57: fix build with OpenSSL <1.0 re. apr_jws_signature_is_ec (thanks to @szakharchenko)

2/26/2015
- release 1.8.0

2/23/2015
- avoid including line feeds in header values (thanks to @forkbomber and @ekanthi)
- bump to 1.8.0rc5

2/16/2015
- fix free() crash on simple-valued error printouts
- fix returning keys without a "kid"
- fix searching for keys with a "x5t" thumbprint
- refactor response type handling; more strict matching of requested response type
- make compiled in Redis support optional
- fix oauth.introspection_endpoint_method in initialization
- bump to 1.8.0rc4

2/15/2015
- add support for configurable introspection HTTP method (OIDCOAuthIntrospectionEndpointMethod)
- add preliminary support for GET-style logout
- bump to 1.8.0rc2

2/12/2015
- add support for configuration of maximum session duration
- bump to 1.8.0rc1

2/9/2015
- check JWT signature against all configured keys (jwks_uri) if no "kid" is provided, not just the first one
- revise JOSE JWS handling part 2
- complete support for local JWT access token validation
- bump to 1.8.0rc0

2/5/2015
- fix symmetric key decryption of JWTs (A128CBC-HS256/A256CBC-HS512)
- sha256 client secrets before using them as symmetric keys for decryption
- extended decryption test coverage; avoid double printouts on error
- refactor JWT header parsing
- simplify JWK URI refresh handling
- release 1.7.3

2/4/2015
- revise JOSE JWK handling part 1
- change change target_uri parameter name to target_link_uri following draft-bradley-oauth-jwt-encoded-state-03
- extended tests with stubs
- refactor JWT validation (iss, exp, iat)
- fix memory leak with RSA key conversion in apr_jwk.c - apr_jwk_rsa_bio_to_key
- bump to 1.7.3rc4

1/25/2015
- Allow {... "error": null ...} in JSON responses. (@fatlotus)

1/22/2015
- fix configuration validation check where no config would be checked if OIDCProviderIssuer is set
  but both OIDRedirectURI and OIDCCryptoPassphrase are not set
- add preliminary support for local JWT access token validation
- bump to 1.7.3rc1
- sanitize set cookie syntax (get rid of extraneous ";")

1/21/2015
- add support for OIDCOAuthIntrospectionTokenParamName (incl. Google OAuth 2.0 access token validation)
- add a sample OAuth 2.0 config for Google access tokens to README.md
- release 1.7.2

- add APXS2_OPTS to configure.ac to accommodate RPM builds
- bump to 1.7.3rc0
- fix JWT timestamp (iat/exp) initialization issue
- fix README.md on Google's scope required for returning the "hd" claim

1/14/2015
- add Apache function stubs to enable extending the scope of tests
- add tests for oidc_proto_validate_access_token and oidc_proto_validate_code
- bump to 1.7.2rc3

1/12/2015
- improve accuracy of expired/invalid session handling

1/11/2015
- add error type and return values to JOSE functions
- fix return result on error in function that decrypts CEK
- bump to 1.7.2rc2

1/1/2015
- update copyright to 2015
- use json_int_t (seconds) for "exp" and "iat" fields, instead of apr_time_t (microseconds) 
- correct expiry debug printout
- bump to 1.7.2rc1

12/15/2014
- fix Redis reconnect behavior: avoid keep reconnecting after first failure
- bump to 1.7.2rc0

12/12/2014
- support passing cookies specified in OIDCPassCookies from browser on to OP/AS calls (for loadbalancing purposes)
- release 1.7.1
- document OIDCPassCookies in auth_openidc.conf

12/10/2014
- reconnect to the Redis server after I/O failure as raised in #43
- bump to 1.7.1rc4

12/8/2014
- return http 500 when detecting requests that will loop on return
- bump to 1.7.1rc3

12/3/2014
- require the expiring access_token on the refresh hook for XSRF protection
- pass error codes back to the caller when the refresh hook fails
- bump to 1.7.1rc2

12/2/2014
- improve handling of non-string (=non-compliant) error responses

11/26/2014
- make shared memory cache entry max size configurable through OIDCCacheShmEntrySizeMax
- add OIDCReturn401 configuration primitive
- bump to 1.7.1rc1

11/11/2014
- allow OIDCRedirectURI's with an empty path and fix crash; thanks to @CedricCabessa

11/9/2014
- support for adding configurable JSON parameters to Dynamic Client Registration requests

11/5/2014
- release 1.7.0

10/30/2014
- correct expires_in conversion
- first stab at HTML templating and make all html HTML 4.01 Strict compliant
- bump to 1.7.0rc4

10/29/2014
- document refresh flow

10/28/2014
- scrub all OIDC_ headers
- add support for the refresh_token flow + hook
- pass the expires_in as an absolute timestamp in OIDC_access_token_expires
- use a global mutex for the Redis cache
- bump to 1.7.0rc3

10/27/2014
- generalize support for OAuth 2.0 token introspection and conform to:
  https://tools.ietf.org/html/draft-ietf-oauth-introspection-00

10/26/2014
- support regular expressions in Require statements

10/24/2014
- add support for Redis cache backend; there's a dependency on hiredis headers/library now

10/21/2014
- refactor nonce generation and remove base64url padding from value

10/13/2014
- add libssl-dev to Debian control build dependencies
- release 1.6.0

10/6/2014
- apply html encoding to error display
- bump version number to 1.6.0rc4

10/2/2014
- avoid crash when downloading metadata from OIDCProviderMetadataURL fails
- set OIDCProviderMetadataURL retrieval interval to 24 hours
- return error on configurations mixing OIDCProviderMetadataURL and OIDCMetadataDir
- bump version number to 1.6.0rc3

10/1/2014
- support provider configuration from a metadata URL (OIDCProviderMetadataURL)
- bump version number to 1.6.0rc2

9/30/2014
- be less strict about issuer validation in metadata
- refactor metadata.c
- improve logging about userinfo endpoint

9/29/2014
- refactor cache so it is partitioned in to sections (i.e. avoid future key collisions)

9/25/2014
- add support for "x5c" JWK representation
- return JWKS on jwks_uri with content-type "application/json"

9/17/2014
- remove support for the X-Frame-Options as it is not needed in 302s
- create and use log macros that printout function name

9/16/2014
- support for passing runtime determined authentication request parameters in the discovery response
- include name/version in logs and bump to 1.6.0rc1
- don't use the X-Frame-Options by default

9/13/2014
- add support for the X-Frame-Options header as recommended by the spec

9/12/2014
- set expiry on state cookies; don't clear session cookie after cache miss or corruption
- fix JSON array memory leak in oauth.c

9/10/2014
- merge #34 (g10f), fix session management Javascript bug

9/3/2014
- improve error handling on hitting the redirect URI directly
- fix set_slot functions for algorithm/url used as default for dynamic registration
- rewording of auth_openidc.conf docs on JWK settings

9/1/2014
- add session management based on http://openid.net/specs/openid-connect-session-1_0.html (draft 21)

8/29/2014
- add configuration option to POST extra parameters to the token endpoint

8/26/2014
- correct cookie_path comparison
- release 1.5.5

8/20/2014
- correctly error out on flows where no id_token was provided ("token")

8/19/2014
- fix debug printout on open redirect prevention
- cleanup in-memory crypto context on shutdown
- use default of "/" for OIDCCookiePath to simplify quickstart/simple deployments
- disable OIDCMetadataDir in sample/default config file
- clear session cookie after cache miss or corruption

8/18/2014
- add HttpOnly flag to cookies by default; can be disabled by config

8/14/2014
- support for passing the id_token in multiple formats (claims|payload|serialized)
- release 1.5.4

8/13/2014
- pass the access_token in OIDC_access_token header to the application

8/9/2014
- merge #21 (Latinovic) to close #18 (big endian JWE issue)
- merge #20 (wadahiro), support for "none" JWT signing algorithm

8/1/2014
- fix cache initialization/destroy leak
- release 1.5.3

7/26/2014
- refactor http code; cleanup JSON encoding in client registration
- refactor padding handling in base64url encoding/decoding

7/20/2014
- check for open redirect on passed target_link_uri
- prevent JWE timing attacks on CEK; add JWE test
- include client_id and scope values in resolved access_token

7/1/2014
- pass JSON objects in app HTTP headers as plain JSON
- correct printout in id_token hash comparisons
- add more tests
- release 1.5.2

6/12/2014
- support third-party-initiated login as defined in the spec
- release 1.5.1
- fix PF OAuth 2.0 RS functionality after upgrading to jansson

6/6/2014
- more changes for Debian packaging (1.5-3)

6/5/2014
- do not set Secure cookies for plain HTTP
- add warning/errors when configured hosts/domains do not match
- release 1.5
- changes for Debian packaging

6/4/2014
- fix passing integer claims on non-Mac OS X systems
- fix claims-based authorization with integer values (@martinsrom)
- fix getting the id_token from request state and error logging
- add AUTHORS file with credits
- migrate README to Markdown README.md

6/3/2014
- change JSON parser from https://github.com/moriyoshi/apr-json to http://www.digip.org/jansson/

6/2/2014
- handle X-Forwarded-Proto/X-Forwarded-Port when running behind a proxy/load-balancer
- release version 1.4

6/1/2014
- compile with OpenSSL <1.0 and but then disable Elliptic Curve verification
- fix jwks_uri setting in nested vhosts
- use OpenSSL_add_all_digests in initialization and EVP_cleanup on shutdown

5/31/2014
- README additions/improvements

5/29/2014
- correct big endian detection
- allow for key identification in JWKs based on thumbprint (x5t)

5/24/2014
- add cache destroy function and destroy shm cache resources on shutdown

5/23/2014
- doc corrections to auth_openidc.conf

5/22/2014
- add implementation of OP-initiated-SSO based on:
  http://tools.ietf.org/html/draft-bradley-oauth-jwt-encoded-state-01
- fix nonce caching for replay prevention

5/21/2014
- correct README on enabling Google+ APIs before applying the sample Google configs
- fix AuthNHeader setting and allow server-wide config too
- avoid segfault on corrupted/non- JSON/JWT input

5/20/2014
- fix URL assembly when running on non-standard port
- release 1.3

5/17/2014
- support outgoing proxy using OIDCOutgoingProxy
- correct sample configs in documentation for missing OIDCCookiePath
- support OIDCCookiePath in server-wide config as well

5/13/2014
- support configurable (custom) query parameters in the authorization request

5/12/2014
- support encrypted JWTs using A128KW and A256KW for the Content Encryption Key
- support A256CBC-HS512 encrypted JWTs
- support custom client JWKs URI

5/8/2014
- support encrypted JWTs using RSA1_5 and A128CBC-HS256

5/2/2014
- do not use ap_get_remote_host for browser fingerprinting

5/1/2014
- split out custom client config into separate <issuer>.conf file
- allow to override client_contact, client_name and registration_token in .conf file
- remove OIDCRegistrationToken command for the static OP config

4/29/2014
- support JWT verification of ES256, ES384 and ES512 algorithms

4/28/2014
- support configurable response_mode (fragment, query or form_post)
- use nonce in all flows except for OP Google and flows "code" or "code token"

4/26/2014
- make client secret optional (support self-issued OP)

4/25/2014
- support Hybrid flows

4/24/2014
- fix using Bearer token Authorization header on JSON POST calls
- support using a Bearer token on client registration calls

4/22/2014
- match request and response type 
- check at_hash value on "token id_token" implicit flow
- use shared memory caching by default
- release 1.2

4/19/2014
- store response_type in state and make state a JSON object

4/18/2014
- support RSASSA-PSS token signing algorithms (PS256,PS384,PS512)

4/17/2014
- improve session inactivity timeout handling

4/16/2014
- set REMOTE_USER and HTTP headers on OAuth 2.0 protected paths

4/15/2014
- add session inactivity timeout
- register all supported response_types during client registration and try
  to pick the one that matches the configured default
- use long timeouts on JWK retrieval calls
- allow for non-null but empty query parameters on implicit authorization response
- simplify azp/aud and nonce handling
- change session_type naming (to "server-cache"/"client-cookie")

4/14/2014
- factor out JOSE related code

4/3/2014
- add configurable claim name for the REMOTE_USER variable, optionally postfixed with the  url-encoded
  issuer value; the default for the remote username is "sub@" now, makeing it unique across OPs
- some refactoring of id_token validation functions
- add INSTALL, move auth_openidc.conf to main directory
- release 1.1

3/28/2014
- fix Require claim name mismatch for Apache 2.4
- fix hmac method/printout naming artifacts from earlier
auto-search-and-replace
- release v1.0.1

3/27/2014
- initial import named mod_auth_openidc
- updated README
- fix debian/changelog