2 Replies Latest reply on Jul 15, 2009 1:20 PM by Shervin Asgari

    Digest Authentication Fails

    Ali Dinc Newbie

      Hi,

      I am trying to use de digest authentication explained in the seam doc. I have create class with method authenticate and configuren the components.xml with the web:authentication-filter.

      When I am trying to login the app I get an error on the screen:     *  Login failed  * Transaction failed .

      The debug output:

      09:28:12,143 INFO [STDOUT] ERROR SeamLoginModule - Error invoking login method
      javax.el.ELException: java.lang.IllegalStateException: No digest request found in session scope
              at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:333)
              at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
              at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
              at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
              at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
              at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:175)
              at org.jboss.seam.security.jaas.SeamLoginModule.login(SeamLoginModule.java:109)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
              at java.lang.reflect.Method.invoke(Method.java:597)
              at javax.security.auth.login.LoginContext.invoke(LoginContext.java:769)
              at javax.security.auth.login.LoginContext.access$000(LoginContext.java:186)
              at javax.security.auth.login.LoginContext$5.run(LoginContext.java:706)
              at java.security.AccessController.doPrivileged(Native Method)
              at javax.security.auth.login.LoginContext.invokeCreatorPriv(LoginContext.java:703)
              at javax.security.auth.login.LoginContext.login(LoginContext.java:575)
              at org.jboss.seam.security.Identity.authenticate(Identity.java:344)
              at org.jboss.seam.security.Identity.authenticate(Identity.java:332)
              at org.jboss.seam.security.Identity.login(Identity.java:259)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
              at java.lang.reflect.Method.invoke(Method.java:597)
              at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
              at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
              at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
              at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
              at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
              at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
              at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
              at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
              at javax.faces.component.UICommand.broadcast(UICommand.java:387)
              at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)
              at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)
              at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)
              at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)
              at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
              at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
              at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
              at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
              at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:522)
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
              at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
              at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
              at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
              at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
              at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
              at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
              at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
              at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
              at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
              at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
              at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
              at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
              at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
              at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
              at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
              at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
              at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
              at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
              at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
              at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
              at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
              at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
              at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
              at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
              at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
              at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
              at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
              at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
              at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
              at java.lang.Thread.run(Thread.java:619)
      Caused by: java.lang.IllegalStateException: No digest request found in session scope
              at org.jboss.seam.security.digest.DigestAuthenticator.validatePassword(DigestAuthenticator.java:22)
              at com.capgemini.jbs.openbriqs.librisweb.beans.Authenticator.authenticate(Authenticator.java:51)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
              at java.lang.reflect.Method.invoke(Method.java:597)
              at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
              at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
              at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
              at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
              at org.jboss.seam.inter
      09:28:12,143 INFO  [STDOUT] cept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
              at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
              at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
              at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
              at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
              at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
              at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
              at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
              at com.capgemini.jbs.openbriqs.librisweb.beans.Authenticator_$$_javassist_1.authenticate(Authenticator_$$_javassist_1.java)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
              at java.lang.reflect.Method.invoke(Method.java:597)
              at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
              ... 87 more


      I have tried to find info about to subject on the web but can't seem to.
      Can anyone help me with this?

        • 1. Re: Digest Authentication Fails
          Ali Dinc Newbie

          Sorry formatting went wrong. Again:


          Hi, I am trying to use de digest authentication explained in the seam doc. I have create class with method authenticate and configuren the components.xml with the web:authentication-filter. When I am trying to login the app I get an error on the screen: Login failed Transaction failed .


          Debug output:


          09:28:12,143 INFO  STDOUT ERROR SeamLoginModule - Error invoking login method
          javax.el.ELException: java.lang.IllegalStateException: No digest request found in session scope
                  at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:333)
                  at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
                  at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
                  at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
                  at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
                  at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:175)
                  at org.jboss.seam.security.jaas.SeamLoginModule.login(SeamLoginModule.java:109)
                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                  at java.lang.reflect.Method.invoke(Method.java:597)
                  at javax.security.auth.login.LoginContext.invoke(LoginContext.java:769)
                  at javax.security.auth.login.LoginContext.access$000(LoginContext.java:186)
                  at javax.security.auth.login.LoginContext$5.run(LoginContext.java:706)
                  at java.security.AccessController.doPrivileged(Native Method)
                  at javax.security.auth.login.LoginContext.invokeCreatorPriv(LoginContext.java:703)
                  at javax.security.auth.login.LoginContext.login(LoginContext.java:575)
                  at org.jboss.seam.security.Identity.authenticate(Identity.java:344)
                  at org.jboss.seam.security.Identity.authenticate(Identity.java:332)
                  at org.jboss.seam.security.Identity.login(Identity.java:259)
                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                  at java.lang.reflect.Method.invoke(Method.java:597)
                  at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
                  at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
                  at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
                  at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
                  at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
                  at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
                  at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
                  at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
                  at javax.faces.component.UICommand.broadcast(UICommand.java:387)
                  at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)
                  at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)
                  at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)
                  at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)
                  at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
                  at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
                  at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
                  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
                  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                  at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:522)
                  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
                  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                  at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                  at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                  at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                  at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                  at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                  at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
                  at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
                  at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
                  at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
                  at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                  at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
                  at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                  at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
                  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
                  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                  at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
                  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
                  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
                  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
                  at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
                  at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
                  at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
                  at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
                  at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
                  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
                  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
                  at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
                  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
                  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
                  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
                  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
                  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
                  at java.lang.Thread.run(Thread.java:619)
          Caused by: java.lang.IllegalStateException: No digest request found in session scope
                  at org.jboss.seam.security.digest.DigestAuthenticator.validatePassword(DigestAuthenticator.java:22)
                  at com.capgemini.jbs.openbriqs.librisweb.beans.Authenticator.authenticate(Authenticator.java:51)
                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                  at java.lang.reflect.Method.invoke(Method.java:597)
                  at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
                  at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
                  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
                  at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
                  at org.jboss.seam.inter
          09:28:12,143 INFO  STDOUT cept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
                  at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
                  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
                  at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
                  at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
                  at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
                  at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
                  at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
                  at com.capgemini.jbs.openbriqs.librisweb.beans.Authenticator$$javassist1.authenticate(Authenticator$$javassist1.java)
                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                  at java.lang.reflect.Method.invoke(Method.java:597)
                  at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
                  ... 87 more


          I have tried to find info about to subject on the web but can't seem to. Can anyone help me with this?

          • 2. Re: Digest Authentication Fails
            Shervin Asgari Master

            I am not exactly sure what your problem is, however I have used digest on authentication and blogged about it here: iteration-on-password-is-added-in-jboss


            Read that carefully, as well as the links the blog posts too, and hope it helps