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      1 =pod
      2 
      3 =head1 NAME
      4 
      5 X509_REQ_get_extensions,
      6 X509_REQ_add_extensions, X509_REQ_add_extensions_nid
      7 - handle X.509 extension attributes of a CSR
      8 
      9 =head1 SYNOPSIS
     10 
     11  #include <openssl/x509.h>
     12 
     13  STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(const X509_REQ *req);
     14  int X509_REQ_add_extensions(X509_REQ *req, const STACK_OF(X509_EXTENSION) *exts);
     15  int X509_REQ_add_extensions_nid(X509_REQ *req,
     16                                  const STACK_OF(X509_EXTENSION) *exts, int nid);
     17 
     18 =head1 DESCRIPTION
     19 
     20 X509_REQ_get_extensions() returns the first list of X.509 extensions
     21 found in the attributes of I<req>.
     22 The returned list is empty if there are no such extensions in I<req>.
     23 The caller is responsible for freeing the list obtained.
     24 
     25 X509_REQ_add_extensions_nid() adds to I<req> a list of X.509 extensions I<exts>,
     26 using I<nid> to identify the extensions attribute.
     27 I<req> is unchanged if I<exts> is NULL or an empty list.
     28 This function may be called more than once on the same I<req> and I<nid>.
     29 In such case any previous extensions are augmented, where an extension to be
     30 added that has the same OID as a pre-existing one replaces this earlier one.
     31 
     32 X509_REQ_add_extensions() is like X509_REQ_add_extensions_nid()
     33 except that the default B<NID_ext_req> is used.
     34 
     35 =head1 RETURN VALUES
     36 
     37 X509_REQ_get_extensions() returns a pointer to B<STACK_OF(X509_EXTENSION)>
     38 or NULL on error.
     39 
     40 X509_REQ_add_extensions() and X509_REQ_add_extensions_nid()
     41 return 1 on success, 0 on error.
     42 
     43 =head1 COPYRIGHT
     44 
     45 Copyright 2022-2024 The OpenSSL Project Authors. All Rights Reserved.
     46 
     47 Licensed under the Apache License 2.0 (the "License").  You may not use
     48 this file except in compliance with the License.  You can obtain a copy
     49 in the file LICENSE in the source distribution or at
     50 L<https://www.openssl.org/source/license.html>.
     51 
     52 =cut
     53