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diff --git a/src/CrlExample.c b/src/CrlExample.c
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+/*
+ *      Copyright (C) 2000,2001 Fabio Fiorina
+ *
+ * This file is part of GNUTLS.
+ *
+ * GNUTLS is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GNUTLS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+/*****************************************************/
+/* File: CrlExample.c                                */
+/* Description: An example on how to use the ASN1    */
+/*              parser with the Certificate.txt file */   
+/*****************************************************/
+
+#include <stdio.h>
+#include <string.h>
+#include "../lib/asn1.h"
+#include "../lib/der.h"
+
+/******************************************************/
+/* Function : get_name_type                           */
+/* Description: analyze a structure of type Name      */
+/* Parameters:                                        */
+/*   char *root: the structure identifier             */
+/*   char *answer: the string with elements like:     */
+/*                 "C=US O=gov"                       */ 
+/******************************************************/
+void
+get_Name_type(node_asn *cert_def,node_asn *cert,char *root, char *answer)
+{
+  int k,k2,result,len;
+  char name[128],str[1024],str2[1024],name2[128],counter[5],name3[128];
+  node_asn *value;
+
+  answer[0]=0;
+  k=1;
+  do{
+    strcpy(name,root);
+    strcat(name,".rdnSequence.?");
+    _asn1_ltostr(k,counter);
+    strcat(name,counter);
+    
+    len = sizeof(str)-1;
+    result=asn1_read_value(cert,name,str,&len);
+    if(result==ASN_ELEMENT_NOT_FOUND) break;
+    k2=1;
+    do{
+      strcpy(name2,name);
+      strcat(name2,".?");
+      _asn1_ltostr(k2,counter);
+      strcat(name2,counter);
+      
+      len = sizeof(str)-1;
+      result=asn1_read_value(cert,name2,str,&len);
+      if(result==ASN_ELEMENT_NOT_FOUND) break;
+      strcpy(name3,name2);
+      strcat(name3,".type");
+      
+      len = sizeof(str)-1;
+      result=asn1_read_value(cert,name3,str,&len);
+      strcpy(name3,name2);
+      strcat(name3,".value");
+      if(result==ASN_OK){
+	len = sizeof(str2);
+	result=asn1_read_value(cert_def,"PKIX1Implicit88.id-at-countryName",
+			  str2,&len);
+	if(!strcmp(str,str2)){
+	  asn1_create_structure(cert_def,"PKIX1Implicit88.X520OrganizationName",
+			   &value,"certificate2-subject-C");
+	  len = sizeof(str)-1;
+	  asn1_read_value(cert,name3,str,&len);
+      	  asn1_get_der(value,str,len);
+	  strcpy(name3,"certificate2-subject-C");
+	  
+	  len = sizeof(str)-1;
+	  asn1_read_value(value,name3,str,&len);  /* CHOICE */
+	  strcat(name3,".");
+	  strcat(name3,str);
+	  
+	  len = sizeof(str)-1;
+	  asn1_read_value(value,name3,str,&len);
+	  str[len]=0;
+	  strcat(answer," C=");
+	  strcat(answer,str);
+	  asn1_delete_structure(value);
+	}
+	else{
+	  len = sizeof(str2);
+	  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-at-organizationName"
+			    ,str2,&len);
+	  if(!strcmp(str,str2)){
+	    asn1_create_structure(cert_def,"PKIX1Implicit88.X520OrganizationName"
+			     ,&value,"certificate2-subject-O");
+	    
+	    len = sizeof(str)-1;
+	    asn1_read_value(cert,name3,str,&len);	  
+	    asn1_get_der(value,str,len);
+	    strcpy(name3,"certificate2-subject-O");
+	    len = sizeof(str)-1;
+	    asn1_read_value(value,name3,str,&len);  /* CHOICE */
+	    strcat(name3,".");
+	    strcat(name3,str);
+	    len = sizeof(str)-1;
+	    asn1_read_value(value,name3,str,&len);
+	    str[len]=0;
+	    strcat(answer," O=");
+	    strcat(answer,str);
+	    asn1_delete_structure(value);
+	  }
+	  else{
+	    len = sizeof(str2);
+	    result=asn1_read_value(cert_def,"PKIX1Implicit88.id-at-organizationalUnitName",str2,&len);
+	    if(!strcmp(str,str2)){
+	      asn1_create_structure(cert_def,"PKIX1Implicit88.X520OrganizationalUnitName",&value,"certificate2-subject-OU");
+	      len = sizeof(str)-1;
+	      asn1_read_value(cert,name3,str,&len);
+	      asn1_get_der(value,str,len);
+	      strcpy(name3,"certificate2-subject-OU");
+	      len = sizeof(str)-1;
+	      asn1_read_value(value,name3,str,&len);  /* CHOICE */
+	      strcat(name3,".");
+	      strcat(name3,str);
+	      len = sizeof(str)-1;
+	      asn1_read_value(value,name3,str,&len);
+	      str[len]=0;
+	      strcat(answer," OU=");
+	      strcat(answer,str);
+	      asn1_delete_structure(value);
+	    }
+	  }
+	}
+      }
+      k2++;
+    }while(1);
+    k++;
+  }while(1);
+}
+
+
+/******************************************************/
+/* Function : create_certificate                      */
+/* Description: creates a certificate named           */
+/*              "certificate1". Values are the same   */
+/*              as in rfc2459 Appendix D.1            */
+/* Parameters:                                        */
+/*   unsigned char *der: contains the der encoding    */
+/*   int *der_len: number of bytes of der string      */ 
+/******************************************************/
+void
+create_CRL(node_asn *cert_def, unsigned char *der,int *der_len)
+{
+  int result,k,len;
+  unsigned char str[1024],*str2;
+  node_asn *crl,*value;
+
+  result=asn1_create_structure(cert_def,"PKIX1Implicit88.CertificateList",&crl,"crl1");
+ 
+  /* Use the next 3 lines to visit the empty certificate */ 
+  /*  printf("-----------------\n");
+   asn1_visit_tree(crl,"crl1");   
+   printf("-----------------\n"); */
+   
+
+  /* version: v2(1) */  
+  result=asn1_write_value(crl,"crl1.tbsCertList.version","v2",0); 
+
+  /* signature: dsa-with-sha */
+  len = sizeof(str)-1;
+  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-dsa-with-sha1",str,&len);
+  result=asn1_write_value(crl,"crl1.tbsCertList.signature.algorithm",str,1);   
+  
+  result=asn1_write_value(crl,"crl1.tbsCertList.signature.parameters",NULL,0);
+
+
+  /* issuer: Country="US" Organization="gov" OrganizationUnit="nist" */
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer","rdnSequence",1);
+
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence","NEW",1);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST","NEW",1);
+  /* C */
+  len = sizeof(str)-1;
+  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-at-countryName",str,&len);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST.?LAST.type",str,1);
+  result=asn1_create_structure(cert_def,"PKIX1Implicit88.X520countryName",
+			  &value,"countryName");
+  result=asn1_write_value(value,"countryName","US",2);
+  result=asn1_create_der(value,"countryName",der,der_len);
+  asn1_delete_structure(value);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST.?LAST.value",der,*der_len);
+
+
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence","NEW",4);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST","NEW",4);
+  /* O */
+  len = sizeof(str)-1;
+  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-at-organizationName",str,&len);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST.?LAST.type",str,8);
+  result=asn1_create_structure(cert_def,"PKIX1Implicit88.X520OrganizationName",
+			  &value,"OrgName");
+  result=asn1_write_value(value,"OrgName","printableString",1);
+  result=asn1_write_value(value,"OrgName.printableString","gov",3);
+  result=asn1_create_der(value,"OrgName",der,der_len);
+  asn1_delete_structure(value);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST.?LAST.value",der,*der_len);
+
+
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence","NEW",1);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST","NEW",1);
+  /* OU */
+  len = sizeof(str)-1;
+  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-at-organizationalUnitName",
+		    str,&len);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST.?LAST.type",str,1);
+  result=asn1_create_structure(cert_def,"PKIX1Implicit88.X520OrganizationalUnitName",&value,"OrgUnitName");
+  result=asn1_write_value(value,"OrgUnitName","printableString",1);
+  result=asn1_write_value(value,"OrgUnitName.printableString","nist",4);
+  result=asn1_create_der(value,"OrgUnitName",der,der_len);
+  asn1_delete_structure(value);
+  result=asn1_write_value(crl,"crl1.tbsCertList.issuer.rdnSequence.?LAST.?LAST.value",der,*der_len);
+
+
+  /* validity */
+  result=asn1_write_value(crl,"crl1.tbsCertList.thisUpdate","utcTime",1);
+  result=asn1_write_value(crl,"crl1.tbsCertList.thisUpdate.utcTime","970801000000Z",1);
+
+  result=asn1_write_value(crl,"crl1.tbsCertList.nextUpdate","utcTime",1);
+  result=asn1_write_value(crl,"crl1.tbsCertList.nextUpdate.utcTime","970808000000Z",1);
+
+
+  /* revokedCertificates */
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates","NEW",1);
+  str[0]=18;
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates.?LAST.userCertificate",str,1);
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates.?LAST.revocationDate","utcTime",1);
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates.?LAST.revocationDate.utcTime","970731000000Z",1);
+
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates.?LAST.crlEntryExtensions","NEW",1);
+  len = sizeof(str)-1;
+  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-ce-cRLReasons",
+		    str,&len);
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates.?LAST.crlEntryExtensions.?LAST.extnID",str,1); /* reasonCode */
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates.?LAST.crlEntryExtensions.?LAST.critical","FALSE",1); 
+  str2="\x0a\x01\x01";
+  result=asn1_write_value(crl,"crl1.tbsCertList.revokedCertificates.?LAST.crlEntryExtensions.?LAST.extnValue",str2,3); 
+
+
+  /* crlExtensions */
+  result=asn1_write_value(crl,"crl1.tbsCertList.crlExtensions",NULL,0);
+
+
+  /* signatureAlgorithm: dsa-with-sha  */
+  len = sizeof(str)-1;
+  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-dsa-with-sha1",str,&len);
+  result=asn1_write_value(crl,"crl1.signatureAlgorithm.algorithm",str,1);  
+  result=asn1_write_value(crl,"crl1.signatureAlgorithm.parameters",NULL,0); /* NO OPTION */  
+
+  /* signature */
+  result=asn1_create_der(crl,"crl1.tbsCertList",der,der_len);
+  if(result!=ASN_OK){
+    printf("\n'tbsCertList' encoding creation: ERROR\n");
+    return;
+  }
+
+  /* add the lines for the signature on der[0]..der[der_len-1]: result in str2 */
+  result=asn1_write_value(crl,"crl1.signature",str2,46*8);  
+  
+
+  /* Use the next 3 lines to visit the certificate */
+  /* printf("-----------------\n");   
+     asn1_visit_tree(crl,"crl1");  
+     printf("-----------------\n"); */
+
+
+  result=asn1_create_der(crl,"crl1",der,der_len);
+  if(result!=ASN_OK){
+    printf("\n'crl1' encoding creation: ERROR\n");
+    return;
+  }
+
+  /* Print the 'Certificate1' DER encoding */ 
+  printf("-----------------\nCrl1 Encoding:\nNumber of bytes=%i\n",*der_len);
+  for(k=0;k<*der_len;k++) printf("%02x ",der[k]);  
+  printf("\n-----------------\n");
+
+  /* Clear the "certificate1" structure */
+  asn1_delete_structure(crl);
+}
+
+
+
+/******************************************************/
+/* Function : get_certificate                         */
+/* Description: creates a certificate named           */
+/*              "certificate2" from a der encoding    */
+/*              string                                */
+/* Parameters:                                        */
+/*   unsigned char *der: the encoding string          */
+/*   int der_len: number of bytes of der string      */ 
+/******************************************************/
+void
+get_CRL(node_asn *cert_def,unsigned char *der,int der_len)
+{
+  int result,len,start,end;
+  unsigned char str[1024],str2[1024];
+  node_asn *crl2;
+
+
+  asn1_create_structure(cert_def,"PKIX1Implicit88.CertificateList",&crl2,"crl2");
+
+  result=asn1_get_der(crl2,der,der_len);
+  
+  if(result!=ASN_OK){
+    printf("Problems with DER encoding\n");
+    return;
+  }
+   
+
+  /* issuer */
+  get_Name_type(cert_def,crl2,"crl2.tbsCertList.issuer",str);
+  printf("crl2:\nissuer =%s\n",str);
+
+
+  /* Verify sign */
+  len = sizeof(str)-1;
+  result=asn1_read_value(crl2,"crl2.signatureAlgorithm.algorithm",str,&len);
+
+  result=asn1_read_value(cert_def,"PKIX1Implicit88.id-dsa-with-sha1",str2,&len);
+  if(!strcmp(str,str2)){  /* dsa-with-sha */
+
+    result=asn1_get_start_end_der(crl2,der,der_len,
+			     "crl2.tbsCertList",&start,&end);
+
+    /* add the lines to calculate the sha on der[start]..der[end] */
+
+    result=asn1_read_value(crl2,"crl2.signature",str,&len);
+
+    /* compare the previous value to signature ( with issuer public key) */ 
+  }
+
+  /* Use the next 3 lines to visit the certificate */
+  /* printf("-----------------\n");   
+     asn1_visit_tree(crl2,"crl2");  
+     printf("-----------------\n"); */
+
+
+  /* Clear the "crl2" structure */
+  asn1_delete_structure(crl2);
+}
+
+
+/********************************************************/
+/* Function : main                                      */
+/* Description: reads the certificate description.      */
+/*              Creates a certificate and calculate     */
+/*              the der encoding. After that creates    */  
+/*              another certificate from der string     */
+/********************************************************/
+int
+main(int argc,char *argv[])
+{
+  int result,der_len;
+  unsigned char der[1024];
+  char file_name[128];
+  node_asn *PKIX1Implicit88;
+
+/*  result=asn1_create_tree(pkix_asn1_tab,&PKIX1Implicit88);*/
+  if(argc==2) strcpy(file_name,argv[1]);
+  else file_name[0]=0;
+  
+  strcat(file_name,"pkix.asn");
+  result=asn1_parser_asn1(file_name,&PKIX1Implicit88);
+
+  if(result==ASN_FILE_NOT_FOUND){
+    printf("FILE NOT FOUND\n");
+    return;
+  }
+  else if(result==ASN_SYNTAX_ERROR){
+    printf("PARSE ERROR\n");
+    return;
+  }
+  else if(result==ASN_IDENTIFIER_NOT_FOUND){
+    printf("IDENTIFIER NOT FOUND\n");
+    return;
+  }
+
+  
+  /* Use the following 3 lines to visit the PKIX1Implicit structures */
+  /* printf("-----------------\n");
+     asn1_visit_tree(cert_def,"PKIX1Implicit88");   
+     printf("-----------------\n"); */
+
+    
+  create_CRL(PKIX1Implicit88,der,&der_len);
+
+  get_CRL(PKIX1Implicit88,der,der_len);
+
+  /* Clear the "PKIX1Implicit88" structures */
+  asn1_delete_structure(PKIX1Implicit88);
+
+  return;
+}
+
+
+
+
+
+
+
+
+