1=pod 2 3=head1 NAME 4 5X509_EXTENSION_set_object, X509_EXTENSION_set_critical, 6X509_EXTENSION_set_data, X509_EXTENSION_create_by_NID, 7X509_EXTENSION_create_by_OBJ, X509_EXTENSION_get_object, 8X509_EXTENSION_get_critical, X509_EXTENSION_get_data - extension utility 9functions 10 11=head1 SYNOPSIS 12 13 int X509_EXTENSION_set_object(X509_EXTENSION *ex, const ASN1_OBJECT *obj); 14 int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit); 15 int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data); 16 17 X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, 18 int nid, int crit, 19 ASN1_OCTET_STRING *data); 20 X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex, 21 const ASN1_OBJECT *obj, int crit, 22 ASN1_OCTET_STRING *data); 23 24 ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex); 25 int X509_EXTENSION_get_critical(const X509_EXTENSION *ex); 26 ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ne); 27 28=head1 DESCRIPTION 29 30X509_EXTENSION_set_object() sets the extension type of B<ex> to B<obj>. The 31B<obj> pointer is duplicated internally so B<obj> should be freed up after use. 32 33X509_EXTENSION_set_critical() sets the criticality of B<ex> to B<crit>. If 34B<crit> is zero the extension in non-critical otherwise it is critical. 35 36X509_EXTENSION_set_data() sets the data in extension B<ex> to B<data>. The 37B<data> pointer is duplicated internally. 38 39X509_EXTENSION_create_by_NID() creates an extension of type B<nid>, 40criticality B<crit> using data B<data>. The created extension is returned and 41written to B<*ex> reusing or allocating a new extension if necessary so B<*ex> 42should either be B<NULL> or a valid B<X509_EXTENSION> structure it must 43B<not> be an uninitialised pointer. 44 45X509_EXTENSION_create_by_OBJ() is identical to X509_EXTENSION_create_by_NID() 46except it creates and extension using B<obj> instead of a NID. 47 48X509_EXTENSION_get_object() returns the extension type of B<ex> as an 49B<ASN1_OBJECT> pointer. The returned pointer is an internal value which must 50not be freed up. 51 52X509_EXTENSION_get_critical() returns the criticality of extension B<ex> it 53returns B<1> for critical and B<0> for non-critical. 54 55X509_EXTENSION_get_data() returns the data of extension B<ex>. The returned 56pointer is an internal value which must not be freed up. 57 58=head1 NOTES 59 60These functions manipulate the contents of an extension directly. Most 61applications will want to parse or encode and add an extension: they should 62use the extension encode and decode functions instead such as 63X509_add1_ext_i2d() and X509_get_ext_d2i(). 64 65The B<data> associated with an extension is the extension encoding in an 66B<ASN1_OCTET_STRING> structure. 67 68=head1 RETURN VALUES 69 70X509_EXTENSION_set_object() X509_EXTENSION_set_critical() and 71X509_EXTENSION_set_data() return B<1> for success and B<0> for failure. 72 73X509_EXTENSION_create_by_NID() and X509_EXTENSION_create_by_OBJ() return 74an B<X509_EXTENSION> pointer or B<NULL> if an error occurs. 75 76X509_EXTENSION_get_object() returns an B<ASN1_OBJECT> pointer. 77 78X509_EXTENSION_get_critical() returns B<0> for non-critical and B<1> for 79critical. 80 81X509_EXTENSION_get_data() returns an B<ASN1_OCTET_STRING> pointer. 82 83=head1 SEE ALSO 84 85L<X509V3_get_d2i(3)> 86 87=head1 COPYRIGHT 88 89Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved. 90 91Licensed under the Apache License 2.0 (the "License"). You may not use 92this file except in compliance with the License. You can obtain a copy 93in the file LICENSE in the source distribution or at 94L<https://www.openssl.org/source/license.html>. 95 96=cut 97