Add ":servlet:spring-boot:java:saml2-login"

config/checkstyle/checkstyle.xml

@@ -3,10 +3,14 @@
 		"-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
 		"https://checkstyle.org/dtds/configuration_1_3.dtd">
 <module name="com.puppycrawl.tools.checkstyle.Checker">
+	<module name="SuppressionFilter">
+		<property name="file" value="${config_loc}/suppressions.xml"/>
+	</module>
 	<module name="io.spring.javaformat.checkstyle.SpringChecks">
 		<property name="avoidStaticImportExcludes" value="org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.*,
 			org.springframework.security.oauth2.client.web.reactive.function.client.ServerOAuth2AuthorizedClientExchangeFilterFunction.*,
-			org.springframework.security.oauth2.client.web.reactive.function.client.ServletOAuth2AuthorizedClientExchangeFilterFunction.*" />
+			org.springframework.security.oauth2.client.web.reactive.function.client.ServletOAuth2AuthorizedClientExchangeFilterFunction.*,
+			org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.*" />
 		<property name="excludes" value="com.puppycrawl.tools.checkstyle.checks.regexp.RegexpSinglelineJavaCheck" />
 	</module>
 	<module name="com.puppycrawl.tools.checkstyle.TreeWalker">

config/checkstyle/suppressions.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<!DOCTYPE suppressions PUBLIC "-//Puppy Crawl//DTD Suppressions 1.1//EN"
+		"https://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+<suppressions>
+	<!-- OpenSamlActionTestingSupport is copied from Open SAML source -->
+	<suppress files="servlet/spring-boot/java/saml2-login/src/integTest/java/example/OpenSamlActionTestingSupport.java" checks=".*"/>
+	<!-- Saml2Utils is copied from Open SAML source -->
+	<suppress files="servlet/spring-boot/java/saml2-login/src/integTest/java/example/Saml2Utils.java" checks=".*"/>
+</suppressions>

gradle.properties

@@ -1 +1,2 @@
 version=5.4.0-SNAPSHOT
+spring-security.version=5.4.0-SNAPSHOT

servlet/spring-boot/java/saml2-login/README.adoc

@@ -0,0 +1,38 @@
+= OAuth 2.0 Login Sample
+
+This guide provides instructions on setting up this SAML 2.0 Login sample application.
+
+The sample application uses Spring Boot and the `spring-security-saml2-service-provider`
+module which is new in Spring Security 5.2.
+
+== Goals
+
+`saml2Login()` provides a very simple implementation of a Service Provider that can receive a SAML 2.0 Response via the HTTP-POST and HTTP-REDIRECT bindings against the SimpleSAMLphp SAML 2.0 reference implementation.
+
+The following features are implemented in the MVP:
+
+1. Receive and validate a SAML 2.0 Response containing an assertion, and create a corresponding authentication in Spring Security
+2. Send a SAML 2.0 AuthNRequest to an Identity Provider
+3. Provide a framework for components used in SAML 2.0 authentication that can be swapped by configuration
+4. Work against the SimpleSAMLphp reference implementation
+
+== Run the Sample
+
+=== Start up the Sample Boot Application
+```
+ ./gradlew :spring-security-samples-boot-saml2login:bootRun
+```
+
+=== Open a Browser
+
+http://localhost:8080/
+
+You will be redirect to the SimpleSAMLphp IDP
+
+=== Type in your credentials
+
+```
+User: user
+Password: password
+```
+

servlet/spring-boot/java/saml2-login/build.gradle

@@ -0,0 +1,27 @@
+plugins {
+	id 'org.springframework.boot' version '2.3.1.RELEASE'
+	id 'io.spring.dependency-management' version '1.0.9.RELEASE'
+	id "nebula.integtest" version "7.0.9"
+	id 'java'
+}
+
+repositories {
+	mavenCentral()
+	maven { url "https://repo.spring.io/snapshot" }
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-security'
+	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.security:spring-security-saml2-service-provider'
+	implementation 'org.thymeleaf.extras:thymeleaf-extras-springsecurity5'
+
+	testImplementation 'net.sourceforge.htmlunit:htmlunit'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'org.springframework.security:spring-security-test'
+}
+
+tasks.withType(Test).configureEach {
+	useJUnitPlatform()
+}

servlet/spring-boot/java/saml2-login/gradle.properties

@@ -0,0 +1 @@
+spring-security.version=5.4.0-SNAPSHOT

servlet/spring-boot/java/saml2-login/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.2.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

servlet/spring-boot/java/saml2-login/gradlew

@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

servlet/spring-boot/java/saml2-login/gradlew.bat

@@ -0,0 +1,103 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

servlet/spring-boot/java/saml2-login/src/integTest/java/example/OpenSamlActionTestingSupport.java

@@ -0,0 +1,466 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package example;
+
+import net.shibboleth.utilities.java.support.annotation.constraint.NotEmpty;
+import org.apache.xml.security.algorithms.JCEMapper;
+import org.apache.xml.security.encryption.XMLCipherParameters;
+import org.joda.time.DateTime;
+import org.joda.time.Duration;
+import org.junit.Assert;
+import org.opensaml.core.xml.config.XMLObjectProviderRegistrySupport;
+import org.opensaml.profile.action.EventIds;
+import org.opensaml.profile.context.EventContext;
+import org.opensaml.profile.context.ProfileRequestContext;
+import org.opensaml.saml.common.SAMLObjectBuilder;
+import org.opensaml.saml.common.SAMLVersion;
+import org.opensaml.saml.saml2.core.Artifact;
+import org.opensaml.saml.saml2.core.ArtifactResolve;
+import org.opensaml.saml.saml2.core.ArtifactResponse;
+import org.opensaml.saml.saml2.core.Assertion;
+import org.opensaml.saml.saml2.core.AttributeQuery;
+import org.opensaml.saml.saml2.core.AttributeStatement;
+import org.opensaml.saml.saml2.core.AuthnRequest;
+import org.opensaml.saml.saml2.core.AuthnStatement;
+import org.opensaml.saml.saml2.core.Conditions;
+import org.opensaml.saml.saml2.core.EncryptedAssertion;
+import org.opensaml.saml.saml2.core.EncryptedID;
+import org.opensaml.saml.saml2.core.Issuer;
+import org.opensaml.saml.saml2.core.LogoutRequest;
+import org.opensaml.saml.saml2.core.LogoutResponse;
+import org.opensaml.saml.saml2.core.NameID;
+import org.opensaml.saml.saml2.core.Response;
+import org.opensaml.saml.saml2.core.Subject;
+import org.opensaml.saml.saml2.core.SubjectConfirmation;
+import org.opensaml.saml.saml2.core.SubjectConfirmationData;
+import org.opensaml.saml.saml2.encryption.Encrypter;
+import org.opensaml.security.credential.BasicCredential;
+import org.opensaml.security.credential.Credential;
+import org.opensaml.security.credential.CredentialSupport;
+import org.opensaml.xmlsec.encryption.support.DataEncryptionParameters;
+import org.opensaml.xmlsec.encryption.support.EncryptionException;
+import org.opensaml.xmlsec.encryption.support.KeyEncryptionParameters;
+import org.springframework.security.saml2.Saml2Exception;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import javax.crypto.SecretKey;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.cert.X509Certificate;
+
+import static java.util.Arrays.asList;
+import static org.opensaml.security.crypto.KeySupport.generateKey;
+
+/**
+ * <b>Copied from OpenSAML Source Code</b> Helper methods for creating/testing SAML 2
+ * objects within profile action tests. When methods herein refer to mock objects they are
+ * always objects that have been created via Mockito unless otherwise noted.
+ */
+public class OpenSamlActionTestingSupport {
+
+	/** ID used for all generated {@link Response} objects. */
+	final static String REQUEST_ID = "request";
+
+	/** ID used for all generated {@link Response} objects. */
+	final static String RESPONSE_ID = "response";
+
+	/** ID used for all generated {@link Assertion} objects. */
+	final static String ASSERTION_ID = "assertion";
+
+	static EncryptedAssertion encryptAssertion(Assertion assertion, X509Certificate certificate) {
+		Encrypter encrypter = getEncrypter(certificate);
+		try {
+			Encrypter.KeyPlacement keyPlacement = Encrypter.KeyPlacement.valueOf("PEER");
+			encrypter.setKeyPlacement(keyPlacement);
+			return encrypter.encrypt(assertion);
+		}
+		catch (EncryptionException e) {
+			throw new Saml2Exception("Unable to encrypt assertion.", e);
+		}
+	}
+
+	static EncryptedID encryptNameId(NameID nameID, X509Certificate certificate) {
+		Encrypter encrypter = getEncrypter(certificate);
+		try {
+			Encrypter.KeyPlacement keyPlacement = Encrypter.KeyPlacement.valueOf("PEER");
+			encrypter.setKeyPlacement(keyPlacement);
+			return encrypter.encrypt(nameID);
+		}
+		catch (EncryptionException e) {
+			throw new Saml2Exception("Unable to encrypt nameID.", e);
+		}
+	}
+
+	static Encrypter getEncrypter(X509Certificate certificate) {
+		Credential credential = CredentialSupport.getSimpleCredential(certificate, null);
+		final String dataAlgorithm = XMLCipherParameters.AES_256;
+		final String keyAlgorithm = XMLCipherParameters.RSA_1_5;
+		SecretKey secretKey = generateKeyFromURI(dataAlgorithm);
+		BasicCredential dataCredential = new BasicCredential(secretKey);
+		DataEncryptionParameters dataEncryptionParameters = new DataEncryptionParameters();
+		dataEncryptionParameters.setEncryptionCredential(dataCredential);
+		dataEncryptionParameters.setAlgorithm(dataAlgorithm);
+
+		KeyEncryptionParameters keyEncryptionParameters = new KeyEncryptionParameters();
+		keyEncryptionParameters.setEncryptionCredential(credential);
+		keyEncryptionParameters.setAlgorithm(keyAlgorithm);
+
+		Encrypter encrypter = new Encrypter(dataEncryptionParameters, asList(keyEncryptionParameters));
+
+		return encrypter;
+	}
+
+	static SecretKey generateKeyFromURI(String algoURI) {
+		try {
+			String jceAlgorithmName = JCEMapper.getJCEKeyAlgorithmFromURI(algoURI);
+			int keyLength = JCEMapper.getKeyLengthFromURI(algoURI);
+			return generateKey(jceAlgorithmName, keyLength, null);
+		}
+		catch (NoSuchAlgorithmException | NoSuchProviderException e) {
+			throw new Saml2Exception(e);
+		}
+	}
+
+	/**
+	 * Builds an empty response. The ID of the message is {@link #OUTBOUND_MSG_ID}, the
+	 * issue instant is 1970-01-01T00:00:00Z and the SAML version is
+	 * {@link SAMLVersion#VERSION_11}.
+	 * @return the constructed response
+	 */
+	@Nonnull
+	static Response buildResponse() {
+		final SAMLObjectBuilder<Response> responseBuilder = (SAMLObjectBuilder<Response>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Response>getBuilderOrThrow(Response.DEFAULT_ELEMENT_NAME);
+
+		final Response response = responseBuilder.buildObject();
+		response.setID(OUTBOUND_MSG_ID);
+		response.setIssueInstant(DateTime.now());
+		response.setVersion(SAMLVersion.VERSION_20);
+
+		return response;
+	}
+
+	/**
+	 * Builds an empty artifact response. The ID of the message is
+	 * {@link #OUTBOUND_MSG_ID}, the issue instant is 1970-01-01T00:00:00Z and the SAML
+	 * version is {@link SAMLVersion#VERSION_11}.
+	 * @return the constructed response
+	 */
+	@Nonnull
+	static ArtifactResponse buildArtifactResponse() {
+		final SAMLObjectBuilder<ArtifactResponse> responseBuilder = (SAMLObjectBuilder<ArtifactResponse>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<ArtifactResponse>getBuilderOrThrow(ArtifactResponse.DEFAULT_ELEMENT_NAME);
+
+		final ArtifactResponse response = responseBuilder.buildObject();
+		response.setID(OUTBOUND_MSG_ID);
+		response.setIssueInstant(DateTime.now());
+		response.setVersion(SAMLVersion.VERSION_20);
+
+		return response;
+	}
+
+	/**
+	 * Builds an {@link LogoutRequest}. If a {@link NameID} is given, it will be added to
+	 * the constructed {@link LogoutRequest}.
+	 * @param name the NameID to add to the request
+	 * @return the built request
+	 */
+	@Nonnull
+	static LogoutRequest buildLogoutRequest(final @Nullable NameID name) {
+		final SAMLObjectBuilder<Issuer> issuerBuilder = (SAMLObjectBuilder<Issuer>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Issuer>getBuilderOrThrow(Issuer.DEFAULT_ELEMENT_NAME);
+
+		final SAMLObjectBuilder<LogoutRequest> reqBuilder = (SAMLObjectBuilder<LogoutRequest>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<LogoutRequest>getBuilderOrThrow(LogoutRequest.DEFAULT_ELEMENT_NAME);
+
+		final Issuer issuer = issuerBuilder.buildObject();
+		issuer.setValue(INBOUND_MSG_ISSUER);
+
+		final LogoutRequest req = reqBuilder.buildObject();
+		req.setID(REQUEST_ID);
+		req.setIssueInstant(DateTime.now());
+		req.setIssuer(issuer);
+		req.setVersion(SAMLVersion.VERSION_20);
+
+		if (name != null) {
+			req.setNameID(name);
+		}
+
+		return req;
+	}
+
+	/**
+	 * Builds an empty logout response. The ID of the message is {@link #OUTBOUND_MSG_ID},
+	 * the issue instant is 1970-01-01T00:00:00Z and the SAML version is
+	 * {@link SAMLVersion#VERSION_11}.
+	 * @return the constructed response
+	 */
+	@Nonnull
+	static LogoutResponse buildLogoutResponse() {
+		final SAMLObjectBuilder<LogoutResponse> responseBuilder = (SAMLObjectBuilder<LogoutResponse>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<LogoutResponse>getBuilderOrThrow(LogoutResponse.DEFAULT_ELEMENT_NAME);
+
+		final LogoutResponse response = responseBuilder.buildObject();
+		response.setID(OUTBOUND_MSG_ID);
+		response.setIssueInstant(DateTime.now());
+		response.setVersion(SAMLVersion.VERSION_20);
+
+		return response;
+	}
+
+	/**
+	 * Builds an empty assertion. The ID of the message is {@link #ASSERTION_ID}, the
+	 * issue instant is 1970-01-01T00:00:00Z and the SAML version is
+	 * {@link SAMLVersion#VERSION_11}.
+	 * @return the constructed assertion
+	 */
+	@Nonnull
+	static Assertion buildAssertion() {
+		final SAMLObjectBuilder<Assertion> assertionBuilder = (SAMLObjectBuilder<Assertion>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Assertion>getBuilderOrThrow(Assertion.DEFAULT_ELEMENT_NAME);
+
+		final Assertion assertion = assertionBuilder.buildObject();
+		assertion.setID(ASSERTION_ID);
+		assertion.setIssueInstant(DateTime.now());
+		assertion.setVersion(SAMLVersion.VERSION_20);
+
+		return assertion;
+	}
+
+	@Nonnull
+	static SubjectConfirmation buildSubjectConfirmation() {
+		final SAMLObjectBuilder<SubjectConfirmation> subjectConfirmation = (SAMLObjectBuilder<SubjectConfirmation>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<SubjectConfirmation>getBuilderOrThrow(SubjectConfirmation.DEFAULT_ELEMENT_NAME);
+
+		return subjectConfirmation.buildObject();
+	}
+
+	/**
+	 * Builds an authentication statement. The authn instant is set to
+	 * 1970-01-01T00:00:00Z.
+	 * @return the constructed statement
+	 */
+	@Nonnull
+	static AuthnStatement buildAuthnStatement() {
+		final SAMLObjectBuilder<AuthnStatement> statementBuilder = (SAMLObjectBuilder<AuthnStatement>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<AuthnStatement>getBuilderOrThrow(AuthnStatement.DEFAULT_ELEMENT_NAME);
+
+		final AuthnStatement statement = statementBuilder.buildObject();
+		statement.setAuthnInstant(DateTime.now());
+
+		return statement;
+	}
+
+	/**
+	 * Builds an empty attribute statement.
+	 * @return the constructed statement
+	 */
+	@Nonnull
+	static AttributeStatement buildAttributeStatement() {
+		final SAMLObjectBuilder<AttributeStatement> statementBuilder = (SAMLObjectBuilder<AttributeStatement>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<AttributeStatement>getBuilderOrThrow(AttributeStatement.DEFAULT_ELEMENT_NAME);
+
+		final AttributeStatement statement = statementBuilder.buildObject();
+
+		return statement;
+	}
+
+	/**
+	 * Builds a {@link Subject}. If a principal name is given a {@link NameID}, whose
+	 * value is the given principal name, will be created and added to the
+	 * {@link Subject}.
+	 * @param principalName the principal name to add to the subject
+	 * @return the built subject
+	 */
+	@Nonnull
+	static Subject buildSubject(final @Nullable String principalName) {
+		final SAMLObjectBuilder<Subject> subjectBuilder = (SAMLObjectBuilder<Subject>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Subject>getBuilderOrThrow(Subject.DEFAULT_ELEMENT_NAME);
+		final Subject subject = subjectBuilder.buildObject();
+
+		if (principalName != null) {
+			subject.setNameID(buildNameID(principalName));
+		}
+
+		return subject;
+	}
+
+	@Nonnull
+	static SubjectConfirmationData buildSubjectConfirmationData(String localSpEntityId) {
+		final SAMLObjectBuilder<SubjectConfirmationData> subjectBuilder = (SAMLObjectBuilder<SubjectConfirmationData>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory()
+				.<SubjectConfirmationData>getBuilderOrThrow(SubjectConfirmationData.DEFAULT_ELEMENT_NAME);
+		final SubjectConfirmationData subject = subjectBuilder.buildObject();
+		subject.setRecipient(localSpEntityId);
+		subject.setNotBefore(DateTime.now().minus(Duration.millis(5 * 60 * 1000)));
+		subject.setNotOnOrAfter(DateTime.now().plus(Duration.millis(5 * 60 * 1000)));
+		return subject;
+	}
+
+	@Nonnull
+	static Conditions buildConditions() {
+		final SAMLObjectBuilder<Conditions> subjectBuilder = (SAMLObjectBuilder<Conditions>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Conditions>getBuilderOrThrow(Conditions.DEFAULT_ELEMENT_NAME);
+		final Conditions conditions = subjectBuilder.buildObject();
+		conditions.setNotBefore(DateTime.now().minus(Duration.millis(5 * 60 * 1000)));
+		conditions.setNotOnOrAfter(DateTime.now().plus(Duration.millis(5 * 60 * 1000)));
+		return conditions;
+	}
+
+	/**
+	 * Builds a {@link NameID}.
+	 * @param principalName the principal name to use in the NameID
+	 * @return the built NameID
+	 */
+	@Nonnull
+	static NameID buildNameID(final @Nonnull @NotEmpty String principalName) {
+		final SAMLObjectBuilder<NameID> nameIdBuilder = (SAMLObjectBuilder<NameID>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<NameID>getBuilderOrThrow(NameID.DEFAULT_ELEMENT_NAME);
+		final NameID nameId = nameIdBuilder.buildObject();
+		nameId.setValue(principalName);
+		return nameId;
+	}
+
+	/**
+	 * Builds a {@link Issuer}.
+	 * @param entityID the entity ID to use in the Issuer
+	 * @return the built Issuer
+	 */
+	@Nonnull
+	static Issuer buildIssuer(final @Nonnull @NotEmpty String entityID) {
+		final SAMLObjectBuilder<Issuer> issuerBuilder = (SAMLObjectBuilder<Issuer>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Issuer>getBuilderOrThrow(Issuer.DEFAULT_ELEMENT_NAME);
+		final Issuer issuer = issuerBuilder.buildObject();
+		issuer.setValue(entityID);
+		return issuer;
+	}
+
+	/**
+	 * Builds an {@link AttributeQuery}. If a {@link Subject} is given, it will be added
+	 * to the constructed {@link AttributeQuery}.
+	 * @param subject the subject to add to the query
+	 * @return the built query
+	 */
+	@Nonnull
+	static AttributeQuery buildAttributeQueryRequest(final @Nullable Subject subject) {
+		final SAMLObjectBuilder<Issuer> issuerBuilder = (SAMLObjectBuilder<Issuer>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Issuer>getBuilderOrThrow(Issuer.DEFAULT_ELEMENT_NAME);
+
+		final SAMLObjectBuilder<AttributeQuery> queryBuilder = (SAMLObjectBuilder<AttributeQuery>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<AttributeQuery>getBuilderOrThrow(AttributeQuery.DEFAULT_ELEMENT_NAME);
+
+		final Issuer issuer = issuerBuilder.buildObject();
+		issuer.setValue(INBOUND_MSG_ISSUER);
+
+		final AttributeQuery query = queryBuilder.buildObject();
+		query.setID(REQUEST_ID);
+		query.setIssueInstant(DateTime.now());
+		query.setIssuer(issuer);
+		query.setVersion(SAMLVersion.VERSION_20);
+
+		if (subject != null) {
+			query.setSubject(subject);
+		}
+
+		return query;
+	}
+
+	/**
+	 * Builds an {@link AuthnRequest}.
+	 * @return the built request
+	 */
+	@Nonnull
+	static AuthnRequest buildAuthnRequest() {
+		final SAMLObjectBuilder<Issuer> issuerBuilder = (SAMLObjectBuilder<Issuer>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<Issuer>getBuilderOrThrow(Issuer.DEFAULT_ELEMENT_NAME);
+
+		final SAMLObjectBuilder<AuthnRequest> requestBuilder = (SAMLObjectBuilder<AuthnRequest>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<AuthnRequest>getBuilderOrThrow(AuthnRequest.DEFAULT_ELEMENT_NAME);
+
+		final Issuer issuer = issuerBuilder.buildObject();
+		issuer.setValue(INBOUND_MSG_ISSUER);
+
+		final AuthnRequest request = requestBuilder.buildObject();
+		request.setID(REQUEST_ID);
+		request.setIssueInstant(DateTime.now());
+		request.setIssuer(issuer);
+		request.setVersion(SAMLVersion.VERSION_20);
+
+		return request;
+	}
+
+	/**
+	 * Builds a {@link ArtifactResolve}.
+	 * @param artifact the artifact to add to the request
+	 * @return the built request
+	 */
+	@Nonnull
+	static ArtifactResolve buildArtifactResolve(final @Nullable String artifact) {
+		final SAMLObjectBuilder<ArtifactResolve> requestBuilder = (SAMLObjectBuilder<ArtifactResolve>) XMLObjectProviderRegistrySupport
+				.getBuilderFactory().<ArtifactResolve>getBuilderOrThrow(ArtifactResolve.DEFAULT_ELEMENT_NAME);
+		final ArtifactResolve request = requestBuilder.buildObject();
+		request.setID(REQUEST_ID);
+		request.setIssueInstant(DateTime.now());
+		request.setVersion(SAMLVersion.VERSION_11);
+
+		if (artifact != null) {
+			final SAMLObjectBuilder<Artifact> artifactBuilder = (SAMLObjectBuilder<Artifact>) XMLObjectProviderRegistrySupport
+					.getBuilderFactory().<Artifact>getBuilderOrThrow(Artifact.DEFAULT_ELEMENT_NAME);
+			final Artifact art = artifactBuilder.buildObject();
+			art.setArtifact(artifact);
+			request.setArtifact(art);
+		}
+
+		return request;
+	}
+
+	/** ID of the inbound message. */
+	public final static String INBOUND_MSG_ID = "inbound";
+
+	/** Issuer of the inbound message. */
+	public final static String INBOUND_MSG_ISSUER = "http://sp.example.org";
+
+	/** ID of the outbound message. */
+	public final static String OUTBOUND_MSG_ID = "outbound";
+
+	/** Issuer of the outbound message. */
+	public final static String OUTBOUND_MSG_ISSUER = "http://idp.example.org";
+
+	/**
+	 * Checks that the request context contains an EventContext, and that the event
+	 * content is as given.
+	 * @param profileRequestContext the context to check
+	 * @param event event to check
+	 */
+	static void assertEvent(@Nonnull final ProfileRequestContext profileRequestContext, @Nonnull final Object event) {
+		EventContext ctx = profileRequestContext.getSubcontext(EventContext.class);
+		Assert.assertNotNull(ctx);
+		Assert.assertEquals(ctx.getEvent(), event);
+	}
+
+	/**
+	 * Checks that the given request context does not contain an EventContext (thus
+	 * signaling a "proceed" event).
+	 * @param profileRequestContext the context to check
+	 */
+	static void assertProceedEvent(@Nonnull final ProfileRequestContext profileRequestContext) {
+		EventContext<String> ctx = profileRequestContext.getSubcontext(EventContext.class);
+		Assert.assertTrue(ctx == null || ctx.getEvent().equals(EventIds.PROCEED_EVENT_ID));
+	}
+
+}

servlet/spring-boot/java/saml2-login/src/integTest/java/example/Saml2LoginIntegrationTests.java

@@ -0,0 +1,471 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package example;
+
+import java.io.ByteArrayInputStream;
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import java.util.UUID;
+
+import javax.servlet.http.HttpSession;
+
+import net.shibboleth.utilities.java.support.component.ComponentInitializationException;
+import net.shibboleth.utilities.java.support.xml.BasicParserPool;
+import net.shibboleth.utilities.java.support.xml.SerializeSupport;
+import net.shibboleth.utilities.java.support.xml.XMLParserException;
+import org.hamcrest.Matcher;
+import org.joda.time.DateTime;
+import org.junit.jupiter.api.Test;
+import org.opensaml.core.xml.XMLObject;
+import org.opensaml.core.xml.config.XMLObjectProviderRegistrySupport;
+import org.opensaml.core.xml.io.MarshallerFactory;
+import org.opensaml.core.xml.io.MarshallingException;
+import org.opensaml.core.xml.io.UnmarshallingException;
+import org.opensaml.saml.common.SignableSAMLObject;
+import org.opensaml.saml.saml2.core.Assertion;
+import org.opensaml.saml.saml2.core.AuthnRequest;
+import org.opensaml.saml.saml2.core.EncryptedAssertion;
+import org.opensaml.saml.saml2.core.EncryptedID;
+import org.opensaml.saml.saml2.core.Response;
+import org.opensaml.saml.saml2.core.SubjectConfirmation;
+import org.opensaml.saml.saml2.core.SubjectConfirmationData;
+import org.opensaml.security.SecurityException;
+import org.opensaml.security.credential.BasicCredential;
+import org.opensaml.security.credential.Credential;
+import org.opensaml.security.credential.CredentialSupport;
+import org.opensaml.security.credential.UsageType;
+import org.opensaml.security.crypto.KeySupport;
+import org.opensaml.xmlsec.SignatureSigningParameters;
+import org.opensaml.xmlsec.signature.support.SignatureConstants;
+import org.opensaml.xmlsec.signature.support.SignatureException;
+import org.opensaml.xmlsec.signature.support.SignatureSupport;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.security.saml2.provider.service.authentication.Saml2AuthenticationException;
+import org.springframework.security.web.WebAttributes;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.ResultActions;
+import org.springframework.test.web.servlet.ResultMatcher;
+import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.matchesRegex;
+import static org.hamcrest.Matchers.startsWith;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.authenticated;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.unauthenticated;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.header;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+public class Saml2LoginIntegrationTests {
+
+	static final String LOCAL_SP_ENTITY_ID = "http://localhost:8080/saml2/service-provider-metadata/simplesamlphp";
+
+	static final String USERNAME = "testuser@spring.security.saml";
+
+	// @formatter:off
+	private String idpCertificate = "-----BEGIN CERTIFICATE-----\n"
+			+ "MIIEEzCCAvugAwIBAgIJAIc1qzLrv+5nMA0GCSqGSIb3DQEBCwUAMIGfMQswCQYD\n"
+			+ "VQQGEwJVUzELMAkGA1UECAwCQ08xFDASBgNVBAcMC0Nhc3RsZSBSb2NrMRwwGgYD\n"
+			+ "VQQKDBNTYW1sIFRlc3RpbmcgU2VydmVyMQswCQYDVQQLDAJJVDEgMB4GA1UEAwwX\n"
+			+ "c2ltcGxlc2FtbHBocC5jZmFwcHMuaW8xIDAeBgkqhkiG9w0BCQEWEWZoYW5pa0Bw\n"
+			+ "aXZvdGFsLmlvMB4XDTE1MDIyMzIyNDUwM1oXDTI1MDIyMjIyNDUwM1owgZ8xCzAJ\n"
+			+ "BgNVBAYTAlVTMQswCQYDVQQIDAJDTzEUMBIGA1UEBwwLQ2FzdGxlIFJvY2sxHDAa\n"
+			+ "BgNVBAoME1NhbWwgVGVzdGluZyBTZXJ2ZXIxCzAJBgNVBAsMAklUMSAwHgYDVQQD\n"
+			+ "DBdzaW1wbGVzYW1scGhwLmNmYXBwcy5pbzEgMB4GCSqGSIb3DQEJARYRZmhhbmlr\n"
+			+ "QHBpdm90YWwuaW8wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC4cn62\n"
+			+ "E1xLqpN34PmbrKBbkOXFjzWgJ9b+pXuaRft6A339uuIQeoeH5qeSKRVTl32L0gdz\n"
+			+ "2ZivLwZXW+cqvftVW1tvEHvzJFyxeTW3fCUeCQsebLnA2qRa07RkxTo6Nf244mWW\n"
+			+ "RDodcoHEfDUSbxfTZ6IExSojSIU2RnD6WllYWFdD1GFpBJOmQB8rAc8wJIBdHFdQ\n"
+			+ "nX8Ttl7hZ6rtgqEYMzYVMuJ2F2r1HSU1zSAvwpdYP6rRGFRJEfdA9mm3WKfNLSc5\n"
+			+ "cljz0X/TXy0vVlAV95l9qcfFzPmrkNIst9FZSwpvB49LyAVke04FQPPwLgVH4gph\n"
+			+ "iJH3jvZ7I+J5lS8VAgMBAAGjUDBOMB0GA1UdDgQWBBTTyP6Cc5HlBJ5+ucVCwGc5\n"
+			+ "ogKNGzAfBgNVHSMEGDAWgBTTyP6Cc5HlBJ5+ucVCwGc5ogKNGzAMBgNVHRMEBTAD\n"
+			+ "AQH/MA0GCSqGSIb3DQEBCwUAA4IBAQAvMS4EQeP/ipV4jOG5lO6/tYCb/iJeAduO\n"
+			+ "nRhkJk0DbX329lDLZhTTL/x/w/9muCVcvLrzEp6PN+VWfw5E5FWtZN0yhGtP9R+v\n"
+			+ "ZnrV+oc2zGD+no1/ySFOe3EiJCO5dehxKjYEmBRv5sU/LZFKZpozKN/BMEa6CqLu\n"
+			+ "xbzb7ykxVr7EVFXwltPxzE9TmL9OACNNyF5eJHWMRMllarUvkcXlh4pux4ks9e6z\n"
+			+ "V9DQBy2zds9f1I3qxg0eX6JnGrXi/ZiCT+lJgVe3ZFXiejiLAiKB04sXW3ti0LW3\n"
+			+ "lx13Y1YlQ4/tlpgTgfIJxKV6nyPiLoK0nywbMd+vpAirDt2Oc+hk\n"
+			+ "-----END CERTIFICATE-----\n";
+	// @formatter:on
+
+	// @formatter:off
+	private String idpPrivateKey = "-----BEGIN PRIVATE KEY-----\n"
+			+ "MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC4cn62E1xLqpN3\n"
+			+ "4PmbrKBbkOXFjzWgJ9b+pXuaRft6A339uuIQeoeH5qeSKRVTl32L0gdz2ZivLwZX\n"
+			+ "W+cqvftVW1tvEHvzJFyxeTW3fCUeCQsebLnA2qRa07RkxTo6Nf244mWWRDodcoHE\n"
+			+ "fDUSbxfTZ6IExSojSIU2RnD6WllYWFdD1GFpBJOmQB8rAc8wJIBdHFdQnX8Ttl7h\n"
+			+ "Z6rtgqEYMzYVMuJ2F2r1HSU1zSAvwpdYP6rRGFRJEfdA9mm3WKfNLSc5cljz0X/T\n"
+			+ "Xy0vVlAV95l9qcfFzPmrkNIst9FZSwpvB49LyAVke04FQPPwLgVH4gphiJH3jvZ7\n"
+			+ "I+J5lS8VAgMBAAECggEBAKyxBlIS7mcp3chvq0RF7B3PHFJMMzkwE+t3pLJcs4cZ\n"
+			+ "nezh/KbREfP70QjXzk/llnZCvxeIs5vRu24vbdBm79qLHqBuHp8XfHHtuo2AfoAQ\n"
+			+ "l4h047Xc/+TKMivnPQ0jX9qqndKDLqZDf5wnbslDmlskvF0a/MjsLU0TxtOfo+dB\n"
+			+ "t55FW11cGqxZwhS5Gnr+cbw3OkHz23b9gEOt9qfwPVepeysbmm9FjU+k4yVa7rAN\n"
+			+ "xcbzVb6Y7GCITe2tgvvEHmjB9BLmWrH3mZ3Af17YU/iN6TrpPd6Sj3QoS+2wGtAe\n"
+			+ "HbUs3CKJu7bIHcj4poal6Kh8519S+erJTtqQ8M0ZiEECgYEA43hLYAPaUueFkdfh\n"
+			+ "9K/7ClH6436CUH3VdizwUXi26fdhhV/I/ot6zLfU2mgEHU22LBECWQGtAFm8kv0P\n"
+			+ "zPn+qjaR3e62l5PIlSYbnkIidzoDZ2ztu4jF5LgStlTJQPteFEGgZVl5o9DaSZOq\n"
+			+ "Yd7G3XqXuQ1VGMW58G5FYJPtA1cCgYEAz5TPUtK+R2KXHMjUwlGY9AefQYRYmyX2\n"
+			+ "Tn/OFgKvY8lpAkMrhPKONq7SMYc8E9v9G7A0dIOXvW7QOYSapNhKU+np3lUafR5F\n"
+			+ "4ZN0bxZ9qjHbn3AMYeraKjeutHvlLtbHdIc1j3sxe/EzltRsYmiqLdEBW0p6hwWg\n"
+			+ "tyGhYWVyaXMCgYAfDOKtHpmEy5nOCLwNXKBWDk7DExfSyPqEgSnk1SeS1HP5ctPK\n"
+			+ "+1st6sIhdiVpopwFc+TwJWxqKdW18tlfT5jVv1E2DEnccw3kXilS9xAhWkfwrEvf\n"
+			+ "V5I74GydewFl32o+NZ8hdo9GL1I8zO1rIq/et8dSOWGuWf9BtKu/vTGTTQKBgFxU\n"
+			+ "VjsCnbvmsEwPUAL2hE/WrBFaKocnxXx5AFNt8lEyHtDwy4Sg1nygGcIJ4sD6koQk\n"
+			+ "RdClT3LkvR04TAiSY80bN/i6ZcPNGUwSaDGZEWAIOSWbkwZijZNFnSGOEgxZX/IG\n"
+			+ "yd39766vREEMTwEeiMNEOZQ/dmxkJm4OOVe25cLdAoGACOtPnq1Fxay80UYBf4rQ\n"
+			+ "+bJ9yX1ulB8WIree1hD7OHSB2lRHxrVYWrglrTvkh63Lgx+EcsTV788OsvAVfPPz\n"
+			+ "BZrn8SdDlQqalMxUBYEFwnsYD3cQ8yOUnijFVC4xNcdDv8OIqVgSk4KKxU5AshaA\n"
+			+ "xk6Mox+u8Cc2eAK12H13i+8=\n"
+			+ "-----END PRIVATE KEY-----\n";
+	// @formatter:on
+
+	// @formatter:off
+	private String spCertificate = "-----BEGIN CERTIFICATE-----\n"
+			+ "MIICgTCCAeoCCQCuVzyqFgMSyDANBgkqhkiG9w0BAQsFADCBhDELMAkGA1UEBhMC\n"
+			+ "VVMxEzARBgNVBAgMCldhc2hpbmd0b24xEjAQBgNVBAcMCVZhbmNvdXZlcjEdMBsG\n"
+			+ "A1UECgwUU3ByaW5nIFNlY3VyaXR5IFNBTUwxCzAJBgNVBAsMAnNwMSAwHgYDVQQD\n"
+			+ "DBdzcC5zcHJpbmcuc2VjdXJpdHkuc2FtbDAeFw0xODA1MTQxNDMwNDRaFw0yODA1\n"
+			+ "MTExNDMwNDRaMIGEMQswCQYDVQQGEwJVUzETMBEGA1UECAwKV2FzaGluZ3RvbjES\n"
+			+ "MBAGA1UEBwwJVmFuY291dmVyMR0wGwYDVQQKDBRTcHJpbmcgU2VjdXJpdHkgU0FN\n"
+			+ "TDELMAkGA1UECwwCc3AxIDAeBgNVBAMMF3NwLnNwcmluZy5zZWN1cml0eS5zYW1s\n"
+			+ "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDRu7/EI0BlNzMEBFVAcbx+lLos\n"
+			+ "vzIWU+01dGTY8gBdhMQNYKZ92lMceo2CuVJ66cUURPym3i7nGGzoSnAxAre+0YIM\n"
+			+ "+U0razrWtAUE735bkcqELZkOTZLelaoOztmWqRbe5OuEmpewH7cx+kNgcVjdctOG\n"
+			+ "y3Q6x+I4qakY/9qhBQIDAQABMA0GCSqGSIb3DQEBCwUAA4GBAAeViTvHOyQopWEi\n"
+			+ "XOfI2Z9eukwrSknDwq/zscR0YxwwqDBMt/QdAODfSwAfnciiYLkmEjlozWRtOeN+\n"
+			+ "qK7UFgP1bRl5qksrYX5S0z2iGJh0GvonLUt3e20Ssfl5tTEDDnAEUMLfBkyaxEHD\n"
+			+ "RZ/nbTJ7VTeZOSyRoVn5XHhpuJ0B\n"
+			+ "-----END CERTIFICATE-----";
+	// @formatter:on
+
+	// @formatter:off
+	private String spPrivateKey = "-----BEGIN PRIVATE KEY-----\n"
+			+ "MIICeAIBADANBgkqhkiG9w0BAQEFAASCAmIwggJeAgEAAoGBANG7v8QjQGU3MwQE\n"
+			+ "VUBxvH6Uuiy/MhZT7TV0ZNjyAF2ExA1gpn3aUxx6jYK5UnrpxRRE/KbeLucYbOhK\n"
+			+ "cDECt77Rggz5TStrOta0BQTvfluRyoQtmQ5Nkt6Vqg7O2ZapFt7k64Sal7AftzH6\n"
+			+ "Q2BxWN1y04bLdDrH4jipqRj/2qEFAgMBAAECgYEAj4ExY1jjdN3iEDuOwXuRB+Nn\n"
+			+ "x7pC4TgntE2huzdKvLJdGvIouTArce8A6JM5NlTBvm69mMepvAHgcsiMH1zGr5J5\n"
+			+ "wJz23mGOyhM1veON41/DJTVG+cxq4soUZhdYy3bpOuXGMAaJ8QLMbQQoivllNihd\n"
+			+ "vwH0rNSK8LTYWWPZYIECQQDxct+TFX1VsQ1eo41K0T4fu2rWUaxlvjUGhK6HxTmY\n"
+			+ "8OMJptunGRJL1CUjIb45Uz7SP8TPz5FwhXWsLfS182kRAkEA3l+Qd9C9gdpUh1uX\n"
+			+ "oPSNIxn5hFUrSTW1EwP9QH9vhwb5Vr8Jrd5ei678WYDLjUcx648RjkjhU9jSMzIx\n"
+			+ "EGvYtQJBAMm/i9NR7IVyyNIgZUpz5q4LI21rl1r4gUQuD8vA36zM81i4ROeuCly0\n"
+			+ "KkfdxR4PUfnKcQCX11YnHjk9uTFj75ECQEFY/gBnxDjzqyF35hAzrYIiMPQVfznt\n"
+			+ "YX/sDTE2AdVBVGaMj1Cb51bPHnNC6Q5kXKQnj/YrLqRQND09Q7ParX0CQQC5NxZr\n"
+			+ "9jKqhHj8yQD6PlXTsY4Occ7DH6/IoDenfdEVD5qlet0zmd50HatN2Jiqm5ubN7CM\n"
+			+ "INrtuLp4YHbgk1mi\n"
+			+ "-----END PRIVATE KEY-----";
+	// @formatter:on
+
+	@Autowired
+	MockMvc mockMvc;
+
+	@Test
+	void applicationAccessWhenSingleProviderAndUnauthenticatedThenRedirectsToAuthNRequest() throws Exception {
+		// @formatter:off
+		this.mockMvc.perform(get("http://localhost:8080/some/url"))
+				.andExpect(status().is3xxRedirection())
+				.andExpect(redirectedUrl("http://localhost:8080/saml2/authenticate/simplesamlphp"));
+		// @formatter:on
+	}
+
+	@Test
+	void authenticateRequestWhenUnauthenticatedThenRespondsWithRedirectAuthNRequestXML() throws Exception {
+		// @formatter:off
+		this.mockMvc.perform(get("http://localhost:8080/saml2/authenticate/simplesamlphp"))
+				.andExpect(status().is3xxRedirection())
+				.andExpect(header().string("Location", startsWith("https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/SSOService.php?SAMLRequest=")));
+		// @formatter:on
+	}
+
+	@Test
+	void authenticateRequestWhenRelayStateThenRespondsWithRedirectAndEncodedRelayState() throws Exception {
+		// @formatter:off
+		MockHttpServletRequestBuilder request = get("http://localhost:8080/saml2/authenticate/simplesamlphp")
+				.param("RelayState", "relay state value with spaces")
+				.param("OtherParam", "OtherParamValue")
+				.param("OtherParam2", "OtherParamValue2");
+		this.mockMvc.perform(request)
+				.andExpect(status().is3xxRedirection())
+				.andExpect(header().string("Location", startsWith("https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/SSOService.php?SAMLRequest=")))
+				.andExpect(header().string("Location", containsString("RelayState=relay%20state%20value%20with%20spaces")))
+				//check order of parameters
+				.andExpect(header().string("Location", matchesRegex(".*\\?SAMLRequest\\=.*\\&RelayState\\=.*\\&SigAlg\\=.*\\&Signature\\=.*")));
+		// @formatter:on
+
+	}
+
+	@Test
+	void authenticateRequestWhenWorkingThenDestinationAttributeIsSet() throws Exception {
+		// @formatter:off
+		final String redirectedUrl = this.mockMvc.perform(get("http://localhost:8080/saml2/authenticate/simplesamlphp"))
+				.andExpect(status().is3xxRedirection())
+				.andReturn()
+				.getResponse()
+				.getRedirectedUrl();
+		MultiValueMap<String, String> parameters = UriComponentsBuilder.fromUriString(redirectedUrl)
+						.build(true)
+						.getQueryParams();
+		// @formatter:on
+		String request = parameters.getFirst("SAMLRequest");
+		assertThat(request).isNotNull().describedAs("SAMLRequest parameter is missing");
+		request = URLDecoder.decode(request);
+		request = Saml2Utils.samlInflate(Saml2Utils.samlDecode(request));
+		AuthnRequest authnRequest = (AuthnRequest) fromXml(request);
+		String destination = authnRequest.getDestination();
+		assertThat(destination).isEqualTo("https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/SSOService.php")
+				.describedAs("Destination must match");
+		String acsURL = authnRequest.getAssertionConsumerServiceURL();
+		assertThat(acsURL).isEqualTo("http://localhost:8080/login/saml2/sso/simplesamlphp")
+				.describedAs("AssertionConsumerServiceURL must match");
+	}
+
+	@Test
+	void authenticateWhenResponseIsSignedThenItSucceeds() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		Response response = buildResponse(assertion);
+		signXmlObject(response, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/").andExpect(authenticated().withUsername(USERNAME));
+	}
+
+	@Test
+	void authenticateWhenAssertionIsThenItSignedSucceeds() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		Response response = buildResponse(assertion);
+		signXmlObject(assertion, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/").andExpect(authenticated().withUsername(USERNAME));
+	}
+
+	@Test
+	void authenticateWhenXmlObjectIsNotSignedThenItFails() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		Response response = buildResponse(assertion);
+		sendResponse(response, "/login?error").andExpect(unauthenticated());
+	}
+
+	@Test
+	void authenticateWhenResponseIsSignedAndAssertionIsEncryptedThenItSucceeds() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		EncryptedAssertion encryptedAssertion = OpenSamlActionTestingSupport.encryptAssertion(assertion,
+				decodeCertificate(this.spCertificate));
+		Response response = buildResponse(encryptedAssertion);
+		signXmlObject(response, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/").andExpect(authenticated().withUsername(USERNAME));
+	}
+
+	@Test
+	void authenticateWhenResponseIsNotSignedAndAssertionIsEncryptedAndSignedThenItSucceeds() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		signXmlObject(assertion, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		EncryptedAssertion encryptedAssertion = OpenSamlActionTestingSupport.encryptAssertion(assertion,
+				decodeCertificate(this.spCertificate));
+		Response response = buildResponse(encryptedAssertion);
+		sendResponse(response, "/").andExpect(authenticated().withUsername(USERNAME));
+	}
+
+	@Test
+	void authenticateWhenResponseIsSignedAndNameIDisEncryptedThenItSucceeds() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		final EncryptedID nameId = OpenSamlActionTestingSupport.encryptNameId(assertion.getSubject().getNameID(),
+				decodeCertificate(this.spCertificate));
+		assertion.getSubject().setEncryptedID(nameId);
+		assertion.getSubject().setNameID(null);
+		Response response = buildResponse(assertion);
+		signXmlObject(assertion, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/").andExpect(authenticated().withUsername(USERNAME));
+	}
+
+	@Test
+	void authenticateWhenSignatureKeysDontMatchThenItFails() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		Response response = buildResponse(assertion);
+		signXmlObject(assertion, getSigningCredential(this.spCertificate, this.spPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/login?error").andExpect(saml2AuthenticationExceptionMatcher("invalid_signature",
+				containsString("Invalid assertion [assertion] for SAML response")));
+	}
+
+	@Test
+	void authenticateWhenNotOnOrAfterDontMatchThenItFails() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		assertion.getConditions().setNotOnOrAfter(DateTime.now().minusDays(1));
+		Response response = buildResponse(assertion);
+		signXmlObject(assertion, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/login?error").andExpect(saml2AuthenticationExceptionMatcher("invalid_assertion",
+				containsString("Invalid assertion [assertion] for SAML response")));
+	}
+
+	@Test
+	void authenticateWhenNotOnOrBeforeDontMatchThenItFails() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		assertion.getConditions().setNotBefore(DateTime.now().plusDays(1));
+		Response response = buildResponse(assertion);
+		signXmlObject(assertion, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/login?error").andExpect(saml2AuthenticationExceptionMatcher("invalid_assertion",
+				containsString("Invalid assertion [assertion] for SAML response")));
+	}
+
+	@Test
+	void authenticateWhenIssuerIsInvalidThenItFails() throws Exception {
+		Assertion assertion = buildAssertion(USERNAME);
+		Response response = buildResponse(assertion);
+		response.getIssuer().setValue("invalid issuer");
+		signXmlObject(response, getSigningCredential(this.idpCertificate, this.idpPrivateKey, UsageType.SIGNING));
+		sendResponse(response, "/login?error").andExpect(unauthenticated()).andExpect(
+				saml2AuthenticationExceptionMatcher("invalid_signature", containsString("Invalid signature")));
+	}
+
+	private ResultActions sendResponse(Response response, String redirectUrl) throws Exception {
+		String xml = toXml(response);
+		// @formatter:off
+		return this.mockMvc.perform(post("http://localhost:8080/login/saml2/sso/simplesamlphp")
+				.contentType(MediaType.APPLICATION_FORM_URLENCODED)
+				.param("SAMLResponse", Saml2Utils.samlEncode(xml.getBytes(StandardCharsets.UTF_8))))
+				.andExpect(status().is3xxRedirection())
+				.andExpect(redirectedUrl(redirectUrl));
+		// @formatter:on
+	}
+
+	private Response buildResponse(Assertion assertion) {
+		Response response = buildResponse();
+		response.getAssertions().add(assertion);
+		return response;
+	}
+
+	private Response buildResponse(EncryptedAssertion assertion) {
+		Response response = buildResponse();
+		response.getEncryptedAssertions().add(assertion);
+		return response;
+	}
+
+	private Response buildResponse() {
+		Response response = OpenSamlActionTestingSupport.buildResponse();
+		response.setID("_" + UUID.randomUUID().toString());
+		response.setDestination("http://localhost:8080/login/saml2/sso/simplesamlphp");
+		response.setIssuer(OpenSamlActionTestingSupport
+				.buildIssuer("https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/metadata.php"));
+		return response;
+	}
+
+	private Assertion buildAssertion(String username) {
+		Assertion assertion = OpenSamlActionTestingSupport.buildAssertion();
+		assertion.setIssueInstant(DateTime.now());
+		assertion.setIssuer(OpenSamlActionTestingSupport
+				.buildIssuer("https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/metadata.php"));
+		assertion.setSubject(OpenSamlActionTestingSupport.buildSubject(username));
+		assertion.setConditions(OpenSamlActionTestingSupport.buildConditions());
+
+		SubjectConfirmation subjectConfirmation = OpenSamlActionTestingSupport.buildSubjectConfirmation();
+
+		// Default to bearer with basic valid confirmation data, but the test can change
+		// as appropriate
+		subjectConfirmation.setMethod(SubjectConfirmation.METHOD_BEARER);
+		final SubjectConfirmationData confirmationData = OpenSamlActionTestingSupport
+				.buildSubjectConfirmationData(LOCAL_SP_ENTITY_ID);
+		confirmationData.setRecipient("http://localhost:8080/login/saml2/sso/simplesamlphp");
+		subjectConfirmation.setSubjectConfirmationData(confirmationData);
+		assertion.getSubject().getSubjectConfirmations().add(subjectConfirmation);
+		return assertion;
+	}
+
+	protected Credential getSigningCredential(String certificate, String key, UsageType usageType)
+			throws CertificateException, KeyException {
+		PublicKey publicKey = decodeCertificate(certificate).getPublicKey();
+		final PrivateKey privateKey = KeySupport.decodePrivateKey(key.getBytes(StandardCharsets.UTF_8), new char[0]);
+		BasicCredential cred = CredentialSupport.getSimpleCredential(publicKey, privateKey);
+		cred.setUsageType(usageType);
+		cred.setEntityId("https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/metadata.php");
+		return cred;
+	}
+
+	private void signXmlObject(SignableSAMLObject object, Credential credential)
+			throws MarshallingException, SecurityException, SignatureException {
+		SignatureSigningParameters parameters = new SignatureSigningParameters();
+		parameters.setSigningCredential(credential);
+		parameters.setSignatureAlgorithm(SignatureConstants.ALGO_ID_SIGNATURE_RSA_SHA256);
+		parameters.setSignatureReferenceDigestMethod(SignatureConstants.ALGO_ID_DIGEST_SHA256);
+		parameters.setSignatureCanonicalizationAlgorithm(SignatureConstants.ALGO_ID_C14N_EXCL_OMIT_COMMENTS);
+		SignatureSupport.signObject(object, parameters);
+	}
+
+	private String toXml(XMLObject object) throws MarshallingException {
+		final MarshallerFactory marshallerFactory = XMLObjectProviderRegistrySupport.getMarshallerFactory();
+		Element element = marshallerFactory.getMarshaller(object).marshall(object);
+		return SerializeSupport.nodeToString(element);
+	}
+
+	private XMLObject fromXml(String xml)
+			throws XMLParserException, UnmarshallingException, ComponentInitializationException {
+		BasicParserPool parserPool = new BasicParserPool();
+		parserPool.initialize();
+		Document document = parserPool.parse(new ByteArrayInputStream(xml.getBytes(StandardCharsets.UTF_8)));
+		Element element = document.getDocumentElement();
+		return XMLObjectProviderRegistrySupport.getUnmarshallerFactory().getUnmarshaller(element).unmarshall(element);
+
+	}
+
+	private X509Certificate decodeCertificate(String source) {
+		try {
+			final CertificateFactory factory = CertificateFactory.getInstance("X.509");
+			return (X509Certificate) factory
+					.generateCertificate(new ByteArrayInputStream(source.getBytes(StandardCharsets.UTF_8)));
+		}
+		catch (Exception ex) {
+			throw new IllegalArgumentException(ex);
+		}
+	}
+
+	private static ResultMatcher saml2AuthenticationExceptionMatcher(String code, Matcher<String> message) {
+		return (result) -> {
+			final HttpSession session = result.getRequest().getSession(false);
+			assertThat(session).isNotNull().describedAs("HttpSession");
+			Object exception = session.getAttribute(WebAttributes.AUTHENTICATION_EXCEPTION);
+			assertThat(exception).isInstanceOf(Saml2AuthenticationException.class);
+			Saml2AuthenticationException se = (Saml2AuthenticationException) exception;
+			assertThat(se.getSaml2Error().getErrorCode()).isEqualTo(code);
+			assertThat(message.matches(se.getSaml2Error().getDescription())).isTrue();
+		};
+	}
+
+	@SpringBootConfiguration
+	@EnableAutoConfiguration
+	public static class SpringBootApplicationTestConfig {
+
+	}
+
+}

servlet/spring-boot/java/saml2-login/src/integTest/java/example/Saml2Utils.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package example;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.zip.Deflater;
+import java.util.zip.DeflaterOutputStream;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterOutputStream;
+
+import org.apache.commons.codec.binary.Base64;
+
+import org.springframework.security.saml2.Saml2Exception;
+
+/**
+ * @since 5.3
+ */
+final class Saml2Utils {
+
+	private static Base64 BASE64 = new Base64(0, new byte[] { '\n' });
+
+	private Saml2Utils() {
+	}
+
+	static String samlEncode(byte[] b) {
+		return BASE64.encodeAsString(b);
+	}
+
+	static byte[] samlDecode(String s) {
+		return BASE64.decode(s);
+	}
+
+	static byte[] samlDeflate(String s) {
+		try {
+			ByteArrayOutputStream b = new ByteArrayOutputStream();
+			DeflaterOutputStream deflater = new DeflaterOutputStream(b, new Deflater(Deflater.DEFLATED, true));
+			deflater.write(s.getBytes(StandardCharsets.UTF_8));
+			deflater.finish();
+			return b.toByteArray();
+		}
+		catch (IOException ex) {
+			throw new Saml2Exception("Unable to deflate string", ex);
+		}
+	}
+
+	static String samlInflate(byte[] b) {
+		try {
+			ByteArrayOutputStream out = new ByteArrayOutputStream();
+			InflaterOutputStream iout = new InflaterOutputStream(out, new Inflater(true));
+			iout.write(b);
+			iout.finish();
+			return new String(out.toByteArray(), StandardCharsets.UTF_8);
+		}
+		catch (IOException ex) {
+			throw new Saml2Exception("Unable to inflate string", ex);
+		}
+	}
+
+}

servlet/spring-boot/java/saml2-login/src/main/java/example/IndexController.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package example;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class IndexController {
+
+	@GetMapping("/")
+	public String index() {
+		return "index";
+	}
+
+}

servlet/spring-boot/java/saml2-login/src/main/java/example/Saml2LoginApplication.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Saml2LoginApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Saml2LoginApplication.class, args);
+	}
+
+}

servlet/spring-boot/java/saml2-login/src/main/resources/application.yml

@@ -0,0 +1,14 @@
+spring:
+  security:
+    saml2:
+      relyingparty:
+        registration:
+          simplesamlphp:
+            signing.credentials:
+              - private-key-location: "classpath:credentials/rp-private.key"
+                certificate-location: "classpath:credentials/rp-certificate.crt"
+            identityprovider:
+              entity-id: https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/metadata.php
+              verification.credentials:
+                - certificate-location: "classpath:credentials/idp-certificate.crt"
+              sso-url: https://simplesaml-for-spring-saml.cfapps.io/saml2/idp/SSOService.php

servlet/spring-boot/java/saml2-login/src/main/resources/credentials/idp-certificate.crt

@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

servlet/spring-boot/java/saml2-login/src/main/resources/credentials/rp-certificate.crt

@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

servlet/spring-boot/java/saml2-login/src/main/resources/credentials/rp-private.key

@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----

servlet/spring-boot/java/saml2-login/src/main/resources/templates/index.html

@@ -0,0 +1,35 @@
+<!--
+  ~ Copyright 2002-2020 the original author or authors.
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<!doctype html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="https://www.thymeleaf.org" xmlns:sec="https://www.thymeleaf.org/thymeleaf-extras-springsecurity5">
+<head>
+	<title>Spring Security - SAML 2.0 Login</title>
+	<meta charset="utf-8" />
+</head>
+<body>
+	<div>
+        <form th:action="@{/logout}" method="post">
+            <input type="submit" value="Logout" />
+        </form>
+        <a href="https://simplesaml-for-spring-saml.cfapps.io/module.php/core/authenticate.php?as=example-userpass&logout">
+            Log out of SimpleSAMLphp
+        </a>
+	</div>
+	<h1>SAML 2.0 Login with Spring Security</h1>
+	<div>You are successfully logged in as <span sec:authentication="name"></span></div>
+</body>
+</html>

settings.gradle

@@ -36,5 +36,5 @@ include ":servlet:spring-boot:java:oauth2:resource-server:multi-tenancy"
 include ":servlet:spring-boot:java:oauth2:resource-server:opaque"
 include ":servlet:spring-boot:java:oauth2:resource-server:static"
 include ":servlet:spring-boot:java:oauth2:webclient"
+include ":servlet:spring-boot:java:saml2-login"
 include ":servlet:spring-boot:kotlin:hello-security"
-