Constify input buffer

 of X509_NAME_add_entry_by_OBJ, X509_NAME_add_entry_by_NID, X509_NAME_ENTRY_create_by_NID
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>

crypto/x509/x509name.c

@@ -131,7 +131,7 @@ X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc)
 }
 
 int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type,
-                               unsigned char *bytes, int len, int loc,
+                               const unsigned char *bytes, int len, int loc,
                                int set)
 {
     X509_NAME_ENTRY *ne;
@@ -145,7 +145,7 @@ int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type
 }
 
 int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
-                               unsigned char *bytes, int len, int loc,
+                               const unsigned char *bytes, int len, int loc,
                                int set)
 {
     X509_NAME_ENTRY *ne;
@@ -253,7 +253,8 @@ X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,
 }
 
 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid,
-                                               int type, unsigned char *bytes,
+                                               int type,
+                                               const unsigned char *bytes,
                                                int len)
 {
     ASN1_OBJECT *obj;

doc/crypto/X509_NAME_ENTRY_get_object.pod

@@ -18,7 +18,7 @@ X509_NAME_ENTRY_create_by_OBJ - X509_NAME_ENTRY utility functions
  int X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type, const unsigned char *bytes, int len);
 
  X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne, const char *field, int type, const unsigned char *bytes, int len);
- X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid, int type, unsigned char *bytes, int len);
+ X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid, int type, const unsigned char *bytes, int len);
  X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne, const ASN1_OBJECT *obj, int type, const unsigned char *bytes, int len);
 
 =head1 DESCRIPTION

doc/crypto/X509_NAME_add_entry_by_txt.pod

@@ -11,9 +11,9 @@ X509_NAME_add_entry, X509_NAME_delete_entry - X509_NAME modification functions
 
  int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type, const unsigned char *bytes, int len, int loc, int set);
 
- int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type, unsigned char *bytes, int len, int loc, int set);
+ int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type, const unsigned char *bytes, int len, int loc, int set);
 
- int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type, unsigned char *bytes, int len, int loc, int set);
+ int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type, const unsigned char *bytes, int len, int loc, int set);
 
  int X509_NAME_add_entry(X509_NAME *name, X509_NAME_ENTRY *ne, int loc, int set);
 

include/openssl/x509.h

@@ -771,17 +771,18 @@ X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc);
 int X509_NAME_add_entry(X509_NAME *name, X509_NAME_ENTRY *ne,
                         int loc, int set);
 int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type,
-                               unsigned char *bytes, int len, int loc,
+                               const unsigned char *bytes, int len, int loc,
                                int set);
 int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
-                               unsigned char *bytes, int len, int loc,
+                               const unsigned char *bytes, int len, int loc,
                                int set);
 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,
                                                const char *field, int type,
                                                const unsigned char *bytes,
                                                int len);
 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid,
-                                               int type, unsigned char *bytes,
+                                               int type, 
+                                               const unsigned char *bytes,
                                                int len);
 int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,
                                const unsigned char *bytes, int len, int loc,