Important Changes:
https://wiki.shibboleth.net/confluence/display/SHIB2/IdPConfigurationChanges

Feature Highlights:
https://wiki.shibboleth.net/confluence/display/SHIB2/IdPInterestingFeatures

Changes in Release 2.4.4
=============================================
[SIDP-624] - IdP stopping metadata retrieval - (Issue Reopened)
[SIDP-625] - Exit with failure status when required
[SIDP-626] - Default logging config turns Spring logging OFF

Changes in Release 2.4.3
=============================================
[SIDP-619] - IdP-included endorsed/xercesImpl-2.10.0.jar exposes XML parsing to CVE-2013-4002 vulnerability
[SIDP-620] - Generated metadata should not include signing-only certificate without a use attribute

Changes in Release 2.4.2
=============================================
[SIDP-615] - Grammatical error in error.jsp

Changes in Release 2.4.1
=============================================
[SIDP-587] - log level too high?
[SIDP-589] - login.jsp - contactTypes are ignored in idpui:serviceContact
[SIDP-600] - Make the inbound message issuer (SP's entity ID) available to logout.jsp
[SIDP-601] - SLO: also clear the client-side cookie when logging out at the IdP
[SIDP-607] - Incorrect/misleading Kerberos authentication example in login.config
[SIDP-611] - Exclude svnkit from distribution due to licensing

Changes in Release 2.4.0
=============================================
[JOST-162] - Globally enabling schema validation breaks the Signature metadata filter
[SIDP-499] - Allow signed requests to bypass ACS verification
[SIDP-545] - Automatic reloading of relying-party.xml results in errors
[SIDP-557] - aacli.sh Exception (again)
[SIDP-558] - Extend ECP handler with some V2.0 and GSS-supporting features
[SIDP-559] - Attribute queries are ignoring input designators
[SIDP-562] - SSO profile handlers don't check for missing session 
[SIDP-563] - IdP-only SAML logout profile handler
[SIDP-564] - Happy Eyeballs support for IdP session cookie address checking
[SIDP-567] - Login Context key entropy can be improved
[SIDP=569] - Make Organization elements via taglib available to login page
[SIDP-570] - Customize ServiceName tag output for unknown SPs
[SIDP-575] - Add option to omit NotBefore from assertion conditions
[SIDP-578] - Update dependencies
[SIDP-579] - Change default login.jsp example to a page with responsive design

Changes in Release 2.3.8
=============================================
- Pick up shib-common lib 1.3.7 that contains a fix for SC-183

Changes in Release 2.3.7
=============================================
[SIDP-543] - No support for data URI in combination with MDUI Logo but for mailto?
[SIDP-547] - VelocityEngine initialization was not effectively using UTF-8 input and output encoding
[SIDP-549] - Incorrect handling of returned authn error in SSO profile handlers
[SIDP-550] - Default IdP metadata provider uses an undocumented plugin
[SIDP-552] - IdP-Metadata containing german umlauts shows encoding-problems on Microsoft Windows

Changes in Release 2.3.6
=============================================
[SIDP-532] - ExternalAuthnSystemLoginHandler incorrectly logs as RemoteUserLoginHandler
[SIDP-536] - LoginContext added to storage service twice but only cleared once
[SIDP-538] - Response does not contain Status when assertion assigning is enabled but signing credential is improperly configured
[SIDP-539] - Update dependencies

Changes in Release 2.3.5
=============================================
[SIDP-529] - NPE with isPassive
[SIDP-530] - Spring mistakenly updated to v3 in IdP 2.3.4 build

Changes in Release 2.3.4
=============================================
[SIDP-508] - NullPointerException in AuthenticationEngine
[SIDP-510] - Error with stack trace when passive cannot be honored
[SIDP-511] - ExternalAuthnSystemLoginHandler does not support forceAuthn/isPassive
[SIDP-512] - idpui taglib should iterate over all browser aproved languages
[SIDP-513] - idpui taglib could look for more languages matches
[SIDP-514] - Alt text for IdP Logos is not esapiEncoder.encodeForHTMLAttribute
[SIDP-516] - Example login.jsp / Usage of label tag
[SIDP-519] - Switching between multiple login handlers cause first context to be sticky in Shib-Authentication-Method
[SIDP-520] - Ipad/iOS devices will auto capitalize text entered into the IdP login screen, which can cause errors. Adding an HTML element will prevent that
[SIDP-521] - Allow specificying file location of renewed key and certificate
[SIDP-522] - supplied examples shouldn't promote federation URIs as relying parties
[SIDP-523] - Add access to inbound AuthnRequest

Changes in Release 2.3.3
=============================================
[SIDP-504] - Alt text generate for logo has mismatched quoting

Changes in Release 2.3.2
=============================================
[SIDP-500] - shibboleth-identityprovider-2.3.1 installer broken on Windows 7 (64-bit) and Windows XP
 - Update version of Shib Common library

Changes in Release 2.3.1
=============================================
[SIDP-490] - REMOTE_USER handler not detecting empty value
[SIDP-491] - Stylesheet link in login.jsp is not inside the head tag
[SIDP-492] - bin/version causes exception
[SIDP-494] - login.config sample needs updating
[SIDP-497] - Queries should return the same NameID supplied by the caller

Changes in Release 2.3.0
=============================================
[SIDP-272] - Regenerate self-signed certificate with installer task
[SIDP-404] - Add an install-time setting for the path to web.xml
[SIDP-429] - Limit metadata SP credential resolution for encryption to RSA keys only
[SIDP-442] - Add JSESSIONID and ClientIP to MDC
[SIDP-448] - Create a login handler that provides authn "state" data to an external authentication 
             system and has that system authenticate the user.
[SIDP-461] - Add legacy Shib SSO protocol as binding for IdP-initiated SSO for SAML 2.0
[SIDP-464] - An SPNameQualifier in NameIDPolicy always treated as an affiliation
[SIDP-468] - Add taglib to simplify rendering login pages.
[SIDP-469] - eduPersonTargetedID Could Be Separately Commented
[SIDP-471] - Taglibs appear to be caching SP information
[SIDP-401] - Quick installer no longer does special things to the Tomcat installation for the "administrator" login
[SIDP-474] - NPE in taglib processing (bug never released).
[SIDP-475] - Better login page for IdP
[SIDP-478] - ECP profile support
[SIDP-480] - Update POM to add plugin versions, use / publish to Shib.net Repo, and attach generated source and Javadocs
[SIDP-482] - JSP pages should HTML-encode any strings they handle
[SIDP-483] - Log Completed, Unencrypted SAML Assertion
[SIDP-484] - Login stops at AuthnEngine with an empty page
[SIDP-485] - <img> inside HTML pages must have alt attribute.[SIDP-486] - login.jsp page contains old wiki link
[SIDP-487] - More login.jsp changes (CR/LF issues, missing period)
[SIDP-488] - PeerEntityId property not set on SAML queries
[SIDP-489] - Typos in idpui.tld

Changes in Release 2.2.1
=============================================
[SIDP-286] - Configurable validity period for self signed certificate
[SIDP-417] - Shib deployed to root web context, SSOProfileHandler forwards to "/null/AuthnEngine"
[SIDP-421] - Error logging SOAP queries
[SIDP-422] - aacli.sh Exception in thread "main" 
[SIDP-426] - Forced authentication does not reset the AuthnInstant 
[SIDP-427] - Incorrect handling of returned authn error in SSO profile handlers
[SIDP-428] - Address lifecycle issues around use of MetadataCredentialResolverFactory
[SIDP-431] - Typo in default attribute-resolver.xml
[SIDP-433] - Update libs for 2.2.1
[SIDP-434] - More Typos in Default attribute-resolver.xml
[SIDP-432] - Set explicit caching headers on redirects
[SIDP-435] - Different principal used for index into session storage and transient ID
[SIDP-436] - Null AuthnContextClassRef causes NPE
[SIDP-438] - Improve user experience when switching versions of SAML
[SIDP-443] - Profile handlers override encoder nameQualifier setting
[SIDP-447] - Fix for SIDP-417 missed RemoteUserLoginHandler
[SIDP-450] - NPE with AttributeQueryProfile when there are errors resolving attributes
[SIDP-452] - Facilitate replay detection to Shibboleth SSO
[SIDP-453] - Session inactivity timeout being treated as a hard expiration time
[SIDP-457] - would be nice to include displayName in default attribute resolver

Changes in Release 2.2.0
=============================================
[SIDP-416] - MetadataProviderObserver leak, new one added on every login
[SIDP-415] - SAML name identifier value not logged in audit log
[SIDP-413] - Change link of example login page
[SIDP-411] - Check for loginContext != null at login.jsp
[SIDP-409] - Pass IdP w/o authenticating
[SIDP-407] - Shibboleth SSO profile handler sets incorrect protocol string in outbound message context
[SIDP-403] - Use text/xml as the media type for returned metadata unless user agent request metadata media type
[SIDP-402] - Update 3rd party libraries for 2.2 release
[SIDP-397] - Remove any unit test that won't be fixed in the 2.X branch, fix the rest
[SIDP-396] - Previous session LoginHandler used even if authentication method has expired
[SIDP-392] - NullPointerException in LoginContext when authentication method information is null
[SIDP-388] - Add eduPersonAssurance attribute to attribute-resolver.xml config example
[SIDP-386] - Session indexes not cleared when session is destroyed
[SIDP-384] - Incorrect error message set for expired request in Shibboleth SSO Profile Handler
[SIDP-382] - Less verbose logging for failed attribute queries due to missing name-id
[SIDP-381] - Use duration notation for assertion lifetime in example config files
[SIDP-380] - Use of forwards between profile handlers and authentication engine causes problems for uApprove
[SIDP-379] - Usage of general AuthenticationException in UsernamePasswordLoginHandler
[SIDP-374] - Switch to use StaticBasicParserPool instead of BasicParserPool
[SIDP-373] - The SLF4J MDC state is not being properly cleared when request processing is done.
[SIDP-368] - Provide more acurate login error to servlet when Username/Password login authentication has failed.
[SIDP-369] - Allow to have cookie Domain set for login context cookie
[SIDP-365] - Expose uptime of IdP web application with status handler
[SIDP-362] - Only log exception message without stack trace for expired SAML messages
[SIDP-360] - Session isn't being set within the attribute request context during a SAML1 attribute query
[SIDP-359] - HttpServletHelper.getRelyingPartyConfirmationManager misnamed
[SIDP-355] - Idp reinstall from source overwrite some config files even when "no overwrite" is specified
[SIDP-301] - Remove use of events in SessionManager so that different StorageService implementations may be more easily used
[SIDP-288] - Improve consistency of XML configuration defaults/examples
[SIDP-275] - Using standard JAAS LoginException in UP LoginHandler servlet
[SC-63] - Use XML Schema duration syntax instead of integers for duration configuration options

Changes in Release 2.1.5
=============================================
[SIDP-353] - Default login.jsp crashes on anonymous RPs

Changes in Release 2.1.4
=============================================
[SIDP-340] - Default tc-config.xml causes TCNonPortableObjectError
[SIDP-342] - NameIdentifier encoder mix-up when the SP doesn't support the first NameIdentifier format
[SIDP-343] - AuthnInstant is updated even when authentication doesn't happen
[SIDP-348] - Remove Terracotta Configuration from IdP Install
[SIDP-249] - LoginContext is not removed from StorageService after Authentication Completes
[SIDP-350] - Installer does not remember installation directory when upgrading
[SIDP-351] - Attribute resolution errors shouldn't prevent valid authn statement being returned

Changes in Release 2.1.3
=============================================
[SIDP-244] - Error message on invalid ACS could be improved
[SIDP-247] - Log Exception in UP LoginHandler Servlet
[SIDP-258] - Authentication Engine does not check to ensure returned authenticaiton mechanism from Login Handler is acceptable to the SP
[SIDP-263] - Suggest adding defaultSigningCredentialRef to the AnonymousRelyingParty element in the default config
[SIDP-261] - IPAddressLoginHandler addresses comparison fails
[SIDP-265] - Distinguish requested AuthMethod and default AuthMethod
[SIDP-266] - General errors triggers error-404.jsp instead of error.jsp
[SIDP-271] - AuthenticationEngine doesn't correctly handle passive return from login servlet
[SIDP-276] - Example RDB Connector, quote principal
[SIDP-277] - Incorrect null check for request context in UsernamePasswordServlet
[SIDP-279] - IdP should log NameID for auditing
[SIDP-281] - Customize login.jsp appearance based on relying party
[SIDP-285] - Use $IDP_SCOPE$ to populate IdP scope in conf-tmpl\attribute-resolver.xml
[SIDP-291] - Update libs for 2.1.3 release
[SIDP-292] - login.jsp: wrong using of the attribute rowspan within the tag <td>
[SIDP-295] - If no cookies are supported/enabled in user agent (browser), display better error message
[SIDP-296] - Make LoginContext / IdP Session availabe through the public API
[SIDP-306] - Remove ClientCertAuth rule from SAML 2 SSO SecurityPolicy in relying-party.xml
[SIDP-310] - Change default relying-party.xml settings for SAML 2 profiles' encryptNameIds parameter from "conditional" to "never"
[SIDP-315] - Credential provided by UsernamePasswordLogin handler as attribute
[SIDP-318] - IdP erroneously logs many normal events as errors
[SIDP-322] - Exception thrown when SP requests a particular authentication method that is not configured
[SIDP-324] - Add additional information to Status handler

Changes in Release 2.1.2
=============================================
* Significant memory optimizations
[SIDP-260] - NPE in login-err.jsp
[SIDP-262] - MIME type on metadata profile handler is incorrect
[SIDP-267] - check if cookies are set on error.jsp
[SIDP-268] - Expose Metadata on entityID URL


Changes in Release 2.1.1
=============================================
[SIDP-248] - Signing code in profile handlers and encoders should not just check that a signing credential is supplied, but that a signing key is available in that credential.
[SIDP-249] - PreviousSession INFO message printed as ERROR message
[SIDP-250] - AuthenticationEngine::returnToAuthenticationEngine() static method called before servlet init() when clustered.
[SIDP-251[ - NPE when SAML1 Attribute Query Handler hit with GET request
[SIDP-252] - IdPSessionFilter throws ArrayIndexOutOfBoundsException on validation of unexpected cookie
[SIDP-257] - Previous session is used if the user has an existing session but the SP requests an authentication method that is not currently active.
[SIDP-259] - Installer does not remove old library versions from IDP_HOME/lib

Changes in Release 2.1.0
=============================================
[SIDP-20] - Cannot deploy on Windows. Spring and DOS device names?
[SIDP-164] - Option to make session cookie secure
[SIDP-165] - Support for SessionNotOnOrAfter
[SIDP-167] - Missing tags and incomplete login.jsp
[SIDP-170] - Attribute Filter refresh won't work with "resource:FileBackedHttpResource"
[SIDP-171] - Cannot deploy to directories in spaces in the names
[SIDP-172] - AACLI.BAT should check whether IDP_HOME is defined before testing whether it exists
[SIDP-175] - Security role name missing in web.xml
[SIDP-176] - useKeyTab should be set to true
[SIDP-181] - Released Attributes not logged when using SAML2
[SIDP-183] - make IdP session available to logging system
[SIDP-185] - NullPointerException after AttributeQuery when Security Rule fails
[SIDP-189] - NPE in AbstractSAML2ProfileHandler
[SIDP-194] - Installer can remember the wrong thing
[SIDP-196] - IdP continues to use old principal name after forced reauthentication
[SIDP-197] - Misleading error message for ValidationInfo element in relying-party.xml
[SIDP-199] - loss of login context when deploying the IdP to tomcat's ROOT context
[SIDP-201] - IdP sends SAML 1 authentication responses without audience conditions
[SIDP-202] - Saml2LoginContext unable to deserialize serialized AuthnRequest
[SIDP-203] - Insufficient information logged to track down errant users
[SIDP-206] - SessionManagerEntry's back reference to the SessionManager object interferes with clustering
[SIDP-209] - Enforce SAML 2 metadata SPSSODescriptor/@AuthnRequestsSigned
[SIDP-212] - Wrong confirmation method used with SAML 1.x artifact profile
[SIDP-214] - Installer needs to put (at least) bcprov onto the calsspath before it runs ant
[SIDP-215] - SHIB-JCE.jar missing from 2.1.0 kit
[SIDP-216] - Second of two signed sources of metadata fail after cache expiration
[SIDP-222] - Template engine used by LDAP and database connectors throw an NPE on startup
[SIDP-224] - Add version information in library JAR manifest and provide command line tool to view it
[SIDP-225] - Credential theft vulnerability in login.jsp
[SIDP-226] - Cross site scripting vulnerability
[SIDP-227] - Default relying-party.xml has SAML2-specific security policy rules included in SAML 1 security policies
[SIDP-228] - Improve error reporting in SAML 2 profile handlers when no encryption key is resolveable for the peer entity ID
[SIDP-229] - IdP Metadata changes to KeyDescriptor not fully flushed from IdP cache
[SIDP-230] - sanity check provided credentials
[SIDP-233] - Typo on operation name - public void setAuthenticationDurection(long duration)
[SIDP-237] - Re-run of install.sh does not create war again
[SIDP-242] - Cleanup StorageService entry classes
