export KEYCLOAK_REALM_KEY="-----BEGIN PUBLIC KEY-----[PEM]-----END PUBLIC KEY-----"
java -jar spring-boot-with-keycloak-security.jar 

java.lang.RuntimeException: org.keycloak.common.util.PemException: java.security.spec.InvalidKeySpecException: encoded key spec not recognized: null
	at org.keycloak.adapters.KeycloakDeploymentBuilder.internalBuild(KeycloakDeploymentBuilder.java:71) ~[keycloak-adapter-core-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.KeycloakDeploymentBuilder.build(KeycloakDeploymentBuilder.java:202) ~[keycloak-adapter-core-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.springboot.KeycloakSpringBootConfigResolver.resolve(KeycloakSpringBootConfigResolver.java:41) ~[keycloak-spring-boot-adapter-core-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.springsecurity.config.KeycloakSpringConfigResolverWrapper.resolve(KeycloakSpringConfigResolverWrapper.java:40) ~[keycloak-spring-security-adapter-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.AdapterDeploymentContext.resolveDeployment(AdapterDeploymentContext.java:89) ~[keycloak-adapter-core-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.PreAuthActionsHandler.preflightCors(PreAuthActionsHandler.java:100) ~[keycloak-adapter-core-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.PreAuthActionsHandler.handleRequest(PreAuthActionsHandler.java:75) ~[keycloak-adapter-core-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.tomcat.AbstractKeycloakAuthenticatorValve.invoke(AbstractKeycloakAuthenticatorValve.java:177) ~[spring-boot-container-bundle-11.0.2.jar:11.0.2]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
	at java.base/java.lang.Thread.run(Thread.java:830) ~[na:na]
Caused by: org.keycloak.common.util.PemException: java.security.spec.InvalidKeySpecException: encoded key spec not recognized: null
	at org.keycloak.common.util.PemUtils.decodePublicKey(PemUtils.java:82) ~[keycloak-common-11.0.2.jar:11.0.2]
	at org.keycloak.adapters.KeycloakDeploymentBuilder.internalBuild(KeycloakDeploymentBuilder.java:67) ~[keycloak-adapter-core-11.0.2.jar:11.0.2]
	... 20 common frames omitted
Caused by: java.security.spec.InvalidKeySpecException: encoded key spec not recognized: null
	at org.bouncycastle.jcajce.provider.asymmetric.util.BaseKeyFactorySpi.engineGeneratePublic(Unknown Source) ~[bcprov-jdk15on-1.65.jar:1.65.0]
	at org.bouncycastle.jcajce.provider.asymmetric.rsa.KeyFactorySpi.engineGeneratePublic(Unknown Source) ~[bcprov-jdk15on-1.65.jar:1.65.0]
	at java.base/java.security.KeyFactory.generatePublic(KeyFactory.java:346) ~[na:na]
	at org.keycloak.common.util.DerUtils.decodePublicKey(DerUtils.java:66) ~[keycloak-common-11.0.2.jar:11.0.2]
	at org.keycloak.common.util.PemUtils.decodePublicKey(PemUtils.java:80) ~[keycloak-common-11.0.2.jar:11.0.2]
	... 21 common frames omitted

    @Autowired
    fun configureAdapterConfig(adapterConfig: AdapterConfig) {
      if(adapterConfig.realmKey != null) {
        adapterConfig.realmKey = adapterConfig.realmKey
          .replace("-----BEGIN PUBLIC KEY-----", "-----BEGIN PUBLIC KEY-----\n")
          .replace("-----END PUBLIC KEY-----", "\n-----END PUBLIC KEY-----")
      }
    }