X509_NAME_add_entry_by_txt(3)

     NAME
          X509_NAME_add_entry_by_txt, X509_NAME_add_entry_by_OBJ,
          X509_NAME_add_entry_by_NID, X509_NAME_add_entry,
          X509_NAME_delete_entry - X509_NAME modification functions

     SYNOPSIS
          int X509_NAME_add_entry_by_txt(X509_NAME *name, char *field,
          int type, unsigned char *bytes, int len, int loc, int set);
          int X509_NAME_add_entry_by_OBJ(X509_NAME *name, ASN1_OBJECT
          *obj, 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, 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);
          X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int
          loc);

     DESCRIPTION
          X509_NAME_add_entry_by_txt(), X509_NAME_add_entry_by_OBJ()
          and X509_NAME_add_entry_by_NID() add a field whose name is
          defined by a string field, an object obj or a NID nid
          respectively.  The field value to be added is in bytes of
          length len. If len is -1 then the field length is calculated
          internally using strlen(bytes).

          The type of field is determined by type which can either be
          a definition of the type of bytes (such as MBSTRING_ASC) or
          a standard ASN1 type (such as V_ASN1_IA5STRING). The new
          entry is added to a position determined by loc and set.

          X509_NAME_add_entry() adds a copy of X509_NAME_ENTRY
          structure ne to name. The new entry is added to a position
          determined by loc and set. Since a copy of ne is added ne
          must be freed up after the call.

          X509_NAME_delete_entry() deletes an entry from name at
          position loc. The deleted entry is returned and must be
          freed up.

     NOTES
          The use of string types such as MBSTRING_ASC or
          MBSTRING_UTF8 is strongly recommened for the type parameter.
          This allows the internal code to correctly determine the
          type of the field and to apply length checks according to
          the relevant standards. This is done using
          ASN1_STRING_set_by_NID().

          If instead an ASN1 type is used no checks are performed and
          the supplied data in bytes is used directly.

          In X509_NAME_add_entry_by_txt() the field string represents
          the field name using OBJ_txt2obj(field, 0).
          The loc and set parameters determine where a new entry
          should be added. For almost all applications loc can be set
          to -1 and set to 0. This adds a new entry to the end of name
          as a single valued RelativeDistinguishedName (RDN).

          loc actually determines the index where the new entry is
          inserted:  if it is -1 it is appended.

          set determines how the new type is added. If it is zero a
          new RDN is created.

          If set is -1 or 1 it is added to the previous or next RDN
          structure respectively. This will then be a multivalued RDN:
          since multivalues RDNs are very seldom used set is almost
          always set to zero.

     EXAMPLES
          Create an X509_NAME structure:

          "C=UK, O=Disorganized Organization, CN=Joe Bloggs"

           X509_NAME *nm;
           nm = X509_NAME_new();
           if (nm == NULL)
                  /* Some error */
           if (!X509_NAME_add_entry_by_txt(nm, MBSTRING_ASC,
                                  "C", "UK", -1, -1, 0))
                  /* Error */
           if (!X509_NAME_add_entry_by_txt(nm, MBSTRING_ASC,
                                  "O", "Disorganized Organization", -1, -1, 0))
                  /* Error */
           if (!X509_NAME_add_entry_by_txt(nm, MBSTRING_ASC,
                                  "CN", "Joe Bloggs", -1, -1, 0))
                  /* Error */


     RETURN VALUES
          X509_NAME_add_entry_by_txt(), X509_NAME_add_entry_by_OBJ(),
          X509_NAME_add_entry_by_NID() and X509_NAME_add_entry()
          return 1 for success of 0 if an error occurred.

          X509_NAME_delete_entry() returns either the deleted
          X509_NAME_ENTRY structure of NULL if an error occurred.

     BUGS
          type can still be set to V_ASN1_APP_CHOOSE to use a
          different algorithm to determine field types. Since this
          form does not understand multicharacter types, performs no
          length checks and can result in invalid field types its use
          is strongly discouraged.

     SEE ALSO
          ERR_get_error(3), d2i_X509_NAME(3)

     HISTORY