add const keyword

13 files changed, 96 insertions, 86 deletions

diff --git a/lib/ASN1.c b/lib/ASN1.c
index 394eebe..044f8e9 100644
--- a/lib/ASN1.c
+++ b/lib/ASN1.c
@@ -1,5 +1,5 @@
 /* A Bison parser, made from ASN1.y
-   by GNU bison 1.32.  */
+   by GNU bison 1.33.  */
 
 #define YYBISON 1  /* Identify Bison output.  */
 
@@ -58,7 +58,7 @@ unsigned long lineNumber; /* line number describing the parser position
 char lastToken[MAX_NAME_SIZE+1];      /* last token find in the file to parse before the
                                          'parse error' */ 
 char identifierMissing[MAX_NAME_SIZE+1]; /* identifier name not found */
-char *fileName;           /* file to parse */
+const char *fileName;           /* file to parse */
 
 int yyerror (char *);
 int yylex(void);
@@ -357,10 +357,12 @@ static const short yycheck[] =
       43,   137,    49,    43,    43,    43,    26
 };
 /* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
-#line 3 "/usr/share/bison/bison.simple"
+#line 3 "/usr/local/share/bison/bison.simple"
 
 /* Skeleton output parser for bison,
-   Copyright (C) 1984, 1989, 1990, 2000, 2001 Free Software Foundation, Inc.
+
+   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002 Free Software
+   Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -406,12 +408,10 @@ static const short yycheck[] =
 
 # if YYSTACK_USE_ALLOCA
 #  define YYSTACK_ALLOC alloca
-#  define YYSIZE_T YYSTD (size_t)
 # else
 #  ifndef YYSTACK_USE_ALLOCA
 #   if defined (alloca) || defined (_ALLOCA_H)
 #    define YYSTACK_ALLOC alloca
-#    define YYSIZE_T YYSTD (size_t)
 #   else
 #    ifdef __GNUC__
 #     define YYSTACK_ALLOC __builtin_alloca
@@ -696,7 +696,7 @@ yystpcpy (yydest, yysrc)
 # endif
 #endif
 
-#line 341 "/usr/share/bison/bison.simple"
+#line 341 "/usr/local/share/bison/bison.simple"
 
 
 /* The user can define YYPARSE_PARAM as the name of an argument to be passed
@@ -1509,7 +1509,7 @@ case 91:
     break;
 }
 
-#line 727 "/usr/share/bison/bison.simple"
+#line 727 "/usr/local/share/bison/bison.simple"
 
 
   yyvsp -= yylen;
@@ -1921,7 +1921,7 @@ _asn1_create_errorDescription(int error,char *errorDescription)
   * ASN1_NAME_TOO_LONG\: in the file there is an identifier whith more than MAX_NAME_SIZE characters.
   **/
 asn1_retCode
-asn1_parser2tree(char *file_name,ASN1_TYPE *definitions,char *errorDescription){
+asn1_parser2tree(const char *file_name,ASN1_TYPE *definitions,char *errorDescription){
 
   p_tree=ASN1_TYPE_EMPTY;
 
@@ -2002,10 +2002,11 @@ asn1_parser2tree(char *file_name,ASN1_TYPE *definitions,char *errorDescription){
   *  ASN1_IDENTIFIER_NOT_FOUND\: in the file there is an identifier that is not defined.
   *  ASN1_NAME_TOO_LONG\: in the file there is an identifier whith more than MAX_NAME_SIZE characters.
   **/
-int asn1_parser2array(char *inputFileName,char *outputFileName,char *vectorName,char *errorDescription){
+int asn1_parser2array(const char *inputFileName,const char *outputFileName,
+		      const char *vectorName,char *errorDescription){
   char *file_out_name=NULL;
   char *vector_name=NULL;
-  char *char_p,*slash_p,*dot_p;
+  const char *char_p,*slash_p,*dot_p;
 
   p_tree=NULL;
 
diff --git a/lib/ASN1.y b/lib/ASN1.y
index b6f874c..62d36c3 100644
--- a/lib/ASN1.y
+++ b/lib/ASN1.y
@@ -42,7 +42,7 @@ unsigned long lineNumber; /* line number describing the parser position
 char lastToken[MAX_NAME_SIZE+1];      /* last token find in the file to parse before the
                                          'parse error' */ 
 char identifierMissing[MAX_NAME_SIZE+1]; /* identifier name not found */
-char *fileName;           /* file to parse */
+const char *fileName;           /* file to parse */
 
 int yyerror (char *);
 int yylex(void);
@@ -555,7 +555,7 @@ _asn1_create_errorDescription(int error,char *errorDescription)
   * ASN1_NAME_TOO_LONG\: in the file there is an identifier whith more than MAX_NAME_SIZE characters.
   **/
 asn1_retCode
-asn1_parser2tree(char *file_name,ASN1_TYPE *definitions,char *errorDescription){
+asn1_parser2tree(const char *file_name,ASN1_TYPE *definitions,char *errorDescription){
 
   p_tree=ASN1_TYPE_EMPTY;
 
@@ -636,10 +636,11 @@ asn1_parser2tree(char *file_name,ASN1_TYPE *definitions,char *errorDescription){
   *  ASN1_IDENTIFIER_NOT_FOUND\: in the file there is an identifier that is not defined.
   *  ASN1_NAME_TOO_LONG\: in the file there is an identifier whith more than MAX_NAME_SIZE characters.
   **/
-int asn1_parser2array(char *inputFileName,char *outputFileName,char *vectorName,char *errorDescription){
+int asn1_parser2array(const char *inputFileName,const char *outputFileName,
+		      const char *vectorName,char *errorDescription){
   char *file_out_name=NULL;
   char *vector_name=NULL;
-  char *char_p,*slash_p,*dot_p;
+  const char *char_p,*slash_p,*dot_p;
 
   p_tree=NULL;
 
diff --git a/lib/coding.c b/lib/coding.c
index eef6270..1b9cbfd 100644
--- a/lib/coding.c
+++ b/lib/coding.c
@@ -139,7 +139,7 @@ _asn1_tag_der(unsigned char class,unsigned int tag_value,unsigned char *ans,int
 /* Return:                                            */
 /******************************************************/
 void
-_asn1_octet_der(unsigned char *str,int str_len,unsigned char *der,int *der_len)
+_asn1_octet_der(const unsigned char *str,int str_len,unsigned char *der,int *der_len)
 {
   int len_len;
 
@@ -285,7 +285,7 @@ char bit_mask[]={0xFF,0xFE,0xFC,0xF8,0xF0,0xE0,0xC0,0x80};
 /* Return:                                            */
 /******************************************************/
 void
-_asn1_bit_der(unsigned char *str,int bit_len,unsigned char *der,int *der_len)
+_asn1_bit_der(const unsigned char *str,int bit_len,unsigned char *der,int *der_len)
 {
   int len_len,len_byte,len_pad;
 
@@ -673,7 +673,7 @@ _asn1_ordering_set_of(unsigned char *der,node_asn *node)
   *   ASN1_VALUE_NOT_FOUND\: there is an element without a value.
   **/
 asn1_retCode 
-asn1_der_coding(ASN1_TYPE element,char *name,unsigned char *der,int *len,
+asn1_der_coding(ASN1_TYPE element,const char *name,unsigned char *der,int *len,
                 char *ErrorDescription)
 {
   node_asn *node,*p;
@@ -815,3 +815,16 @@ asn1_der_coding(ASN1_TYPE element,char *name,unsigned char *der,int *len,
 }
 
 
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/lib/decoding.c b/lib/decoding.c
index 79c4abc..219be0f 100644
--- a/lib/decoding.c
+++ b/lib/decoding.c
@@ -46,7 +46,7 @@ _asn1_error_description_tag_error(node_asn *node,char *ErrorDescription)
 
   
 unsigned long
-_asn1_get_length_der(unsigned char *der,int  *len)
+_asn1_get_length_der(const unsigned char *der,int  *len)
 {
   unsigned long ans;
   int k,punt;
@@ -72,7 +72,7 @@ _asn1_get_length_der(unsigned char *der,int  *len)
 
 
 unsigned int
-_asn1_get_tag_der(unsigned char *der,unsigned char *class,int  *len)
+_asn1_get_tag_der(const unsigned char *der,unsigned char *class,int  *len)
 {
   int punt,ris;
 
@@ -98,7 +98,7 @@ _asn1_get_tag_der(unsigned char *der,unsigned char *class,int  *len)
 
 
 int
-_asn1_get_octet_der(unsigned char *der,int *der_len,unsigned char *str,int str_size, int *str_len)
+_asn1_get_octet_der(const unsigned char *der,int *der_len,unsigned char *str,int str_size, int *str_len)
 {
   int len_len;
 
@@ -118,7 +118,7 @@ _asn1_get_octet_der(unsigned char *der,int *der_len,unsigned char *str,int str_s
 
 
 void
-_asn1_get_time_der(unsigned char *der,int *der_len,unsigned char *str)
+_asn1_get_time_der(const unsigned char *der,int *der_len,unsigned char *str)
 {
   int len_len,str_len;
 
@@ -132,7 +132,7 @@ _asn1_get_time_der(unsigned char *der,int *der_len,unsigned char *str)
 
 
 void
-_asn1_get_objectid_der(unsigned char *der,int *der_len,unsigned char *str, int str_size)
+_asn1_get_objectid_der(const unsigned char *der,int *der_len,unsigned char *str, int str_size)
 {
   int len_len,len,k;
   char temp[20];
@@ -165,7 +165,7 @@ _asn1_get_objectid_der(unsigned char *der,int *der_len,unsigned char *str, int s
 
 
 int
-_asn1_get_bit_der(unsigned char *der,int *der_len,unsigned char *str, int str_size, int *bit_len)
+_asn1_get_bit_der(const unsigned char *der,int *der_len,unsigned char *str, int str_size, int *bit_len)
 {
   int len_len,len_byte;
 
@@ -187,7 +187,7 @@ _asn1_get_bit_der(unsigned char *der,int *der_len,unsigned char *str, int str_si
 
 
 int
-_asn1_extract_tag_der(node_asn *node,unsigned char *der,int *der_len)
+_asn1_extract_tag_der(node_asn *node,const unsigned char *der,int *der_len)
 {
   node_asn *p;
   int counter,len2,len3,is_tag_implicit;
@@ -371,7 +371,8 @@ _asn1_delete_not_used(node_asn *node)
   **/
 
 asn1_retCode
-asn1_der_decoding(ASN1_TYPE *element,unsigned char *der,int len,char *errorDescription)
+asn1_der_decoding(ASN1_TYPE *element,const unsigned char *der,int len,
+		  char *errorDescription)
 {
   node_asn *node,*p,*p2,*p3;
   char temp[128];
@@ -663,7 +664,8 @@ asn1_der_decoding(ASN1_TYPE *element,unsigned char *der,int len,char *errorDescr
   *   ASN1_TAG_ERROR,ASN1_DER_ERROR\: the der encoding doesn't match the structure STRUCTURE. *ELEMENT deleted. 
   **/
 asn1_retCode
-asn1_der_decoding_element(ASN1_TYPE *structure,char *elementName,unsigned char *der,int len,char *errorDescription)
+asn1_der_decoding_element(ASN1_TYPE *structure,const char *elementName,
+			  const unsigned char *der,int len,char *errorDescription)
 {
   node_asn *node,*p,*p2,*p3,*nodeFound=ASN1_TYPE_EMPTY;
   char temp[128],currentName[MAX_NAME_SIZE*10],*dot_p,*char_p;
@@ -1114,7 +1116,8 @@ asn1_der_decoding_element(ASN1_TYPE *structure,char *elementName,unsigned char *
   *
   **/
 asn1_retCode
-asn1_der_decoding_startEnd(ASN1_TYPE element,unsigned char *der,int len,char *name_element,int *start, int *end)
+asn1_der_decoding_startEnd(ASN1_TYPE element,const unsigned char *der,int len,
+			   const char *name_element,int *start, int *end)
 {
   node_asn *node,*node_to_find,*p,*p2,*p3;
   int counter,len2,len3,move,ris;
@@ -1513,7 +1516,7 @@ asn1_expand_any_defined_by(ASN1_TYPE definitions,ASN1_TYPE *element)
   **/
 asn1_retCode
 asn1_expand_octet_string(ASN1_TYPE definitions,ASN1_TYPE *element,
-                         char *octetName,char *objectName)
+                         const char *octetName,const char *objectName)
 {
   char name[2*MAX_NAME_SIZE+1],value[512];
   asn1_retCode retCode=ASN1_SUCCESS,result;
diff --git a/lib/der.h b/lib/der.h
index 301336d..5d0927f 100644
--- a/lib/der.h
+++ b/lib/der.h
@@ -27,32 +27,26 @@
 #define TAG_ENUMERATED       0x0A
 #define TAG_NULL             0x05
 
-unsigned int _asn1_get_tag_der(unsigned char *der,
+unsigned int _asn1_get_tag_der(const unsigned char *der,
                 unsigned char *class,int  *len);
 
-void _asn1_octet_der(unsigned char *str,int str_len,
+void _asn1_octet_der(const unsigned char *str,int str_len,
                      unsigned char *der,int *der_len);
 
-asn1_retCode _asn1_get_octet_der(unsigned char *der,
+asn1_retCode _asn1_get_octet_der(const unsigned char *der,
                 int *der_len,unsigned char *str,int str_size, int *str_len);
 
-void _asn1_bit_der(unsigned char *str,int bit_len,
+void _asn1_bit_der(const unsigned char *str,int bit_len,
                    unsigned char *der,int *der_len);
 
-asn1_retCode _asn1_get_bit_der(unsigned char *der,
+asn1_retCode _asn1_get_bit_der(const unsigned char *der,
                 int *der_len,unsigned char *str, int str_size, 
                 int *bit_len);
 
-unsigned long _asn1_get_length_der(unsigned char *der,int  *len);
+unsigned long _asn1_get_length_der(const unsigned char *der,int  *len);
 
 void _asn1_length_der(unsigned long len,unsigned char *ans,int *ans_len);
 
-asn1_retCode 
-asn1_der_coding(ASN1_TYPE element,char *name,unsigned char *der,int *len,
-                char *ErrorDescription);
-
-asn1_retCode
-asn1_der_decoding(ASN1_TYPE *element,unsigned char *der,int len,char *errorDescription);
 
 #endif
 
diff --git a/lib/element.c b/lib/element.c
index f1d87eb..6937908 100644
--- a/lib/element.c
+++ b/lib/element.c
@@ -72,7 +72,7 @@ _asn1_hierarchical_name(node_asn *node,char *name,int name_size)
 /* Return: ASN1_MEM_ERROR or ASN1_SUCCESS                                */
 /******************************************************************/
 asn1_retCode
-_asn1_convert_integer(char *value,unsigned char *value_out,int value_out_size, int *len)
+_asn1_convert_integer(const char *value,unsigned char *value_out,int value_out_size, int *len)
 {
   char negative;
   unsigned char val[SIZEOF_UNSIGNED_LONG_INT],temp;
@@ -243,7 +243,8 @@ _asn1_append_sequence_set(node_asn *node)
   * 
   **/
 asn1_retCode 
-asn1_write_value(node_asn *node_root,char *name,unsigned char *value,int len)
+asn1_write_value(node_asn *node_root,const char *name,
+		 const unsigned char *value,int len)
 {
   node_asn *node,*p,*p2;
   unsigned char *temp,*value_temp=NULL,*default_temp=NULL;
@@ -555,7 +556,7 @@ asn1_write_value(node_asn *node_root,char *name,unsigned char *value,int len)
   * 
   **/
 asn1_retCode 
-asn1_read_value(node_asn *root,char *name,unsigned char *value, int *len)
+asn1_read_value(node_asn *root,const char *name,unsigned char *value, int *len)
 {
   node_asn *node,*p;
   int len2,len3;
diff --git a/lib/element.h b/lib/element.h
index 9fff601..3db9529 100644
--- a/lib/element.h
+++ b/lib/element.h
@@ -5,7 +5,7 @@
 
 asn1_retCode _asn1_append_sequence_set(node_asn *node);
 
-asn1_retCode _asn1_convert_integer(char *value,unsigned char *value_out,
+asn1_retCode _asn1_convert_integer(const char *value,unsigned char *value_out,
 			  int value_out_size, int *len);
 
 void _asn1_hierarchical_name(node_asn *node,char *name,int name_size);
diff --git a/lib/int.h b/lib/int.h
index 947415a..ecad211 100644
--- a/lib/int.h
+++ b/lib/int.h
@@ -148,21 +148,16 @@ typedef struct static_struct_asn ASN1_ARRAY_TYPE;
 /* functions */
 asn1_retCode asn1_delete_structure(ASN1_TYPE *structure);
 
-asn1_retCode asn1_create_element(ASN1_TYPE definitions,char *source_name,
-                                 ASN1_TYPE *element, char *dest_name);
+asn1_retCode asn1_create_element(ASN1_TYPE definitions,const char *source_name,
+                                 ASN1_TYPE *element,const  char *dest_name);
 
-asn1_retCode asn1_read_value(ASN1_TYPE element,char *name,unsigned char *value,
-                             int *len);
-
-asn1_retCode
-asn1_expand_any_defined_by(ASN1_TYPE definitions,ASN1_TYPE *element);
-
-void
-asn1_print_structure(FILE *out,ASN1_TYPE structure,char *name,int mode);
+asn1_retCode asn1_read_value(ASN1_TYPE element,const char *name,
+			     unsigned char *value,int *len);
 
 asn1_retCode
 asn1_expand_octet_string(ASN1_TYPE definitions,ASN1_TYPE *element,
-                         char *octetName,char *objectName);
+                         const char *octetName,const char *objectName);
+
 
 #endif /* INT_H */
 
diff --git a/lib/libtasn1.h b/lib/libtasn1.h
index fa3badd..a794f17 100644
--- a/lib/libtasn1.h
+++ b/lib/libtasn1.h
@@ -28,7 +28,7 @@
 extern "C" {
 #endif
 
-#define LIBASN1_VERSION "0.1.0"
+#define LIBASN1_VERSION "0.1.1"
 
 #include <sys/types.h>
 #include <time.h>
@@ -103,47 +103,47 @@ typedef struct static_struct_asn ASN1_ARRAY_TYPE;
   /*  Functions definitions          */
   /***********************************/
 
-asn1_retCode asn1_parser2tree(char *file_name,ASN1_TYPE *definitions,
+asn1_retCode asn1_parser2tree(const char *file_name,ASN1_TYPE *definitions,
                               char *errorDescription);
 
-asn1_retCode asn1_parser2array(char *inputFileName,char *outputFileName,
-                               char *vectorName,char *errorDescription);
+asn1_retCode asn1_parser2array(const char *inputFileName,const char *outputFileName,
+                               const char *vectorName,char *errorDescription);
 
 asn1_retCode asn1_array2tree(const ASN1_ARRAY_TYPE *array,
                              ASN1_TYPE *definitions,char *errorDescription);
 
-void asn1_print_structure(FILE *out,ASN1_TYPE structure,char *name,int mode);
+void asn1_print_structure(FILE *out,ASN1_TYPE structure,const char *name,int mode);
 
-asn1_retCode asn1_create_element(ASN1_TYPE definitions,char *source_name,
-                                 ASN1_TYPE *element, char *dest_name);
+asn1_retCode asn1_create_element(ASN1_TYPE definitions,const char *source_name,
+                                 ASN1_TYPE *element,const char *dest_name);
 
 asn1_retCode asn1_delete_structure(ASN1_TYPE *structure);
 
-asn1_retCode asn1_write_value(ASN1_TYPE element,char *name,
-			      unsigned char *value,int len);
+asn1_retCode asn1_write_value(ASN1_TYPE element,const char *name,
+			      const unsigned char *value,int len);
 
-asn1_retCode asn1_read_value(ASN1_TYPE element,char *name,unsigned char *value,
+asn1_retCode asn1_read_value(ASN1_TYPE element,const char *name,unsigned char *value,
                              int *len);
 
-asn1_retCode asn1_number_of_elements(ASN1_TYPE element,char *name,int *num);
+asn1_retCode asn1_number_of_elements(ASN1_TYPE element,const char *name,int *num);
 
-asn1_retCode asn1_der_coding(ASN1_TYPE element,char *name,
+asn1_retCode asn1_der_coding(ASN1_TYPE element,const char *name,
                unsigned char *der,int *len,char *ErrorDescription);
 
-asn1_retCode asn1_der_decoding(ASN1_TYPE *element,unsigned char *der,int len,
+asn1_retCode asn1_der_decoding(ASN1_TYPE *element,const unsigned char *der,int len,
                  char *errorDescription);
 
-asn1_retCode asn1_der_decoding_element(ASN1_TYPE *structure,char *elementName,
-		 unsigned char *der,int len,char *errorDescription);
+asn1_retCode asn1_der_decoding_element(ASN1_TYPE *structure,const char *elementName,
+		 const unsigned char *der,int len,char *errorDescription);
 
-asn1_retCode asn1_der_decoding_startEnd(ASN1_TYPE element,unsigned char *der,
-               int len,char *name,int *start, int *end);
+asn1_retCode asn1_der_decoding_startEnd(ASN1_TYPE element,const unsigned char *der,
+               int len,const char *name,int *start, int *end);
 
 asn1_retCode asn1_expand_any_defined_by(ASN1_TYPE definitions,
                ASN1_TYPE *element);
 
 asn1_retCode asn1_expand_octet_string(ASN1_TYPE definitions,ASN1_TYPE *element,
-	       char *octetName,char *objectName);
+	       const char *octetName,const char *objectName);
 
 const char* libasn1_strerror(asn1_retCode error);
 
diff --git a/lib/parser_aux.c b/lib/parser_aux.c
index b891a3a..fbe5aad 100644
--- a/lib/parser_aux.c
+++ b/lib/parser_aux.c
@@ -92,10 +92,11 @@ _asn1_add_node(unsigned int type)
 /* Return: the searching result. NULL if not find.                */
 /******************************************************************/
 node_asn *
-_asn1_find_node(node_asn *pointer,char *name)
+_asn1_find_node(node_asn *pointer,const char *name)
 {
   node_asn *p;
-  char *n_start,*n_end,n[128];
+  char *n_end,n[128];
+  const char *n_start;
 
   if((name==NULL) || (name[0]==0)) return NULL;
 
@@ -167,7 +168,7 @@ _asn1_find_node(node_asn *pointer,char *name)
 /* Return: pointer to the NODE_ASN element.                       */
 /******************************************************************/
 node_asn *
-_asn1_set_value(node_asn *node,unsigned char *value,unsigned int len)
+_asn1_set_value(node_asn *node,const unsigned char *value,unsigned int len)
 {
 
   if(node==NULL) return node;
@@ -194,7 +195,7 @@ _asn1_set_value(node_asn *node,unsigned char *value,unsigned int len)
 /* Return: pointer to the NODE_ASN element.                       */
 /******************************************************************/
 node_asn *
-_asn1_set_name(node_asn *node,char *name)
+_asn1_set_name(node_asn *node,const char *name)
 {
   if(node==NULL) return node;
 
diff --git a/lib/parser_aux.h b/lib/parser_aux.h
index 937df66..08dcd7d 100644
--- a/lib/parser_aux.h
+++ b/lib/parser_aux.h
@@ -10,10 +10,10 @@ node_asn *
 _asn1_add_node(unsigned int type);
 
 node_asn *
-_asn1_set_value(node_asn *node,unsigned char *value,unsigned int len);
+_asn1_set_value(node_asn *node,const unsigned char *value,unsigned int len);
 
 node_asn *
-_asn1_set_name(node_asn *node,char *name);
+_asn1_set_name(node_asn *node,const char *name);
 
 node_asn *
 _asn1_set_right(node_asn *node,node_asn *right);
@@ -47,7 +47,7 @@ char * _asn1_ltostr(long v,char *str);
 
 node_asn * _asn1_find_up(node_asn *node);
 
-node_asn * _asn1_find_node(node_asn *pointer,char *name);
+node_asn * _asn1_find_node(node_asn *pointer,const char *name);
 
 asn1_retCode _asn1_change_integer_value(ASN1_TYPE node);
 
diff --git a/lib/structure.c b/lib/structure.c
index 03798de..1df77c4 100644
--- a/lib/structure.c
+++ b/lib/structure.c
@@ -366,7 +366,7 @@ _asn1_copy_structure3(node_asn *source_node)
 
 
 node_asn *
-_asn1_copy_structure2(node_asn *root,char *source_name)
+_asn1_copy_structure2(node_asn *root,const char *source_name)
 {
   node_asn *source_node;
 
@@ -539,7 +539,8 @@ _asn1_expand_identifier(node_asn **node,node_asn *root)
   *  result=asn1_create_structure(cert_def,"PKIX1.Certificate",&cert,"certificate1");
   **/
 asn1_retCode
-asn1_create_element(ASN1_TYPE definitions,char *source_name,ASN1_TYPE *element,char *dest_name)
+asn1_create_element(ASN1_TYPE definitions,const char *source_name,
+		    ASN1_TYPE *element,const char *dest_name)
 {
   node_asn *dest_node;
   int res;
@@ -572,7 +573,7 @@ asn1_create_element(ASN1_TYPE definitions,char *source_name,ASN1_TYPE *element,c
   * the structure *POINTER. 
   **/
 void
-asn1_print_structure(FILE *out,ASN1_TYPE structure,char *name,int mode)
+asn1_print_structure(FILE *out,ASN1_TYPE structure,const char *name,int mode)
 {
   node_asn *p,*root;
   int k,indent=0,len,len2,len3;
@@ -828,7 +829,7 @@ asn1_print_structure(FILE *out,ASN1_TYPE structure,char *name,int mode)
   *
   **/
 asn1_retCode 
-asn1_number_of_elements(ASN1_TYPE element,char *name,int *num)
+asn1_number_of_elements(ASN1_TYPE element,const char *name,int *num)
 {
   node_asn *node,*p;
 
diff --git a/lib/structure.h b/lib/structure.h
index 8309761..5c302fa 100644
--- a/lib/structure.h
+++ b/lib/structure.h
@@ -23,7 +23,7 @@ asn1_retCode _asn1_create_static_structure(node_asn *pointer,
 
 node_asn* _asn1_copy_structure3(node_asn *source_node);
 
-node_asn* _asn1_copy_structure2(node_asn *root,char *source_name);
+node_asn* _asn1_copy_structure2(node_asn *root,const char *source_name);
 
 node_asn * _asn1_add_node_only(unsigned int type);