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java.lang.IllegalArgumentException: Null input buffer	at javax.crypto.Cipher.doFinal(Cipher.java:2127)	at com.thortech.xl.crypto.tcDefaultDBEncryptionImpl.decrypt(tcDefaultDBEncryptionImpl.java:222)	at com.thortech.xl.crypto.tcCryptoUtil.decrypt(tcCryptoUtil.java:122)	at com.thortech.xl.crypto.tcCryptoUtil.decrypt(tcCryptoUtil.java:200)	at oracle.iam.platform.utils.crypto.CryptoUtil.decrypt(CryptoUtil.java:94)	at oracle.iam.selfservice.uself.uselfmgmt.impl.UnauthenticatedSelfServiceHelper.validateChallengeParams(UnauthenticatedSelfServiceHelper.java:522)	at oracle.iam.selfservice.self.selfmgmt.impl.handlers.setchallenge.SetChallengeValuesValidationHandler.validate(SetChallengeValuesValidationHandler.java:220)	at oracle.iam.selfservice.self.selfmgmt.impl.handlers.setchallenge.SetChallengeValuesValidationHandler.validate(SetChallengeValuesValidationHandler.java:128)	at oracle.iam.platform.kernel.impl.OIMEvent.executeHandlers(OIMEvent.java:204)	at oracle.iam.platform.kernel.impl.MonitoredOIMEvent.invokeExecuteHandler(MonitoredOIMEvent.java:99)	at oracle.iam.platform.kernel.impl.MonitoredOIMEvent.executeHandlers(MonitoredOIMEvent.java:69)	at oracle.iam.platform.kernel.impl.OIMEvent.execute(OIMEvent.java:157)	at oracle.iam.platform.kernel.impl.ProcessImpl.executeStage(ProcessImpl.java:223)	at oracle.iam.platform.kernel.impl.OIMProcess.doStageExecution(OIMProcess.java:38)	at oracle.iam.platform.kernel.impl.ProcessImpl.execute(ProcessImpl.java:182)	at oracle.iam.platform.kernel.impl.MonitoredOIMProcess.execute(MonitoredOIMProcess.java:33)	at oracle.iam.platform.kernel.impl.Utils.manageSyncProcessing(Utils.java:73)	at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.doProcessing(OrchestrationEngineImpl.java:357)	at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:349)	at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:330)	at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:325)	at oracle.iam.identity.usermgmt.impl.UserManagerImpl.setUserChallengeValues(UserManagerImpl.java:5515)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)	at oracle.iam.platform.utils.DMSMethodInterceptor.invoke(DMSMethodInterceptor.java:35)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)	at com.sun.proxy.$Proxy468.setUserChallengeValues(Unknown Source)	at oracle.iam.identity.usermgmt.api.UserManagerEJB.setUserChallengeValuesx(Unknown Source)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)	at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)	at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)	at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)	at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)	at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at com.oracle.pitchfork.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:34)	at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:54)	at com.oracle.pitchfork.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:42)	at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)	at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)	at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)	at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)	at com.sun.proxy.$Proxy467.setUserChallengeValuesx(Unknown Source)	at oracle.iam.identity.usermgmt.api.UserManager_nimav7_UserManagerRemoteImpl.__WL_invoke(Unknown Source)	at weblogic.ejb.container.internal.SessionRemoteMethodInvoker.invoke(SessionRemoteMethodInvoker.java:40)	at oracle.iam.identity.usermgmt.api.UserManager_nimav7_UserManagerRemoteImpl.setUserChallengeValuesx(Unknown Source)	at oracle.iam.identity.usermgmt.api.UserManager_nimav7_UserManagerRemoteImpl_WLSkel.invoke(Unknown Source)	at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:667)	at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)	at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:522)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:146)	at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:518)	at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)	at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)