1=pod 2 3=head1 NAME 4 5X509_ACERT_get_attr, 6X509_ACERT_get_attr_by_NID, 7X509_ACERT_get_attr_by_OBJ, 8X509_ACERT_get_attr_count 9- Retrieve attributes from an X509_ACERT structure 10 11=head1 SYNOPSIS 12 13 #include <openssl/x509_acert.h> 14 15 X509_ATTRIBUTE *X509_ACERT_get_attr(const X509_ACERT *x, int loc); 16 int X509_ACERT_get_attr_by_NID(const X509_ACERT *x, int nid, int lastpos); 17 int X509_ACERT_get_attr_by_OBJ(const X509_ACERT *x, const ASN1_OBJECT *obj, 18 int lastpos); 19 int X509_ACERT_get_attr_count(const X509_ACERT *x); 20 21=head1 DESCRIPTION 22 23X509_ACERT_get0_attr() retrieves the I<loc>th B<X509_ATTRIBUTE> from an 24B<X509_ACERT> I<x>. X509_ACERT_get_attr_count() returns the total number 25of attributes in the B<X509_ACERT>. 26 27X509_ACERT_get_attr_by_NID() and X509_ACERT_get_attr_by_OBJ() retrieve the next 28attribute location matching I<nid> or I<obj> after I<lastpos>. I<lastpos> 29should initially be set to -1. 30If there are no more entries -1 is returned. If I<nid> is invalid 31(doesn't correspond to a valid OID) then -2 is returned. 32 33=head1 RETURN VALUES 34 35X509_ACERT_get0_attr() return a B<X509_ATTRIBUTE> from an attribute 36certificate, or NULL if the specified attribute is not found. 37 38X509_ACERT_get_attr_by_NID() and X509_ACERT_get_attr_by_OBJ() return 39the location of the next attribute requested or -1 if not found. 40X509_ACERT_get_attr_by_NID() can also return -2 if the supplied NID is invalid. 41 42X509_ACERT_get_attr_count() returns the number of attributes in the given 43attribute certificate. 44 45=head1 HISTORY 46 47X509_ACERT_get0_attr(), X509_ACERT_get_attr_by_NID(), X509_ACERT_get_attr_by_OBJ() and 48X509_ACERT_get_attr_count() were added in OpenSSL 3.4. 49 50=head1 COPYRIGHT 51 52Copyright 2023-2024 The OpenSSL Project Authors. All Rights Reserved. 53 54Licensed under the Apache License 2.0 (the "License"). You may not use 55this file except in compliance with the License. You can obtain a copy 56in the file LICENSE in the source distribution or at 57L<https://www.openssl.org/source/license.html>. 58 59=cut 60
