Updated: 2022/Sep/29

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X509_EXTENSION_set_object(3)        OpenSSL       X509_EXTENSION_set_object(3)



NAME
       X509_EXTENSION_set_object, X509_EXTENSION_set_critical,
       X509_EXTENSION_set_data, X509_EXTENSION_create_by_NID,
       X509_EXTENSION_create_by_OBJ, X509_EXTENSION_get_object,
       X509_EXTENSION_get_critical, X509_EXTENSION_get_data - extension
       utility functions

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        int X509_EXTENSION_set_object(X509_EXTENSION *ex, const ASN1_OBJECT *obj);
        int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit);
        int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data);

        X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex,
                                                     int nid, int crit,
                                                     ASN1_OCTET_STRING *data);
        X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
                                                     const ASN1_OBJECT *obj, int crit,
                                                     ASN1_OCTET_STRING *data);

        ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex);
        int X509_EXTENSION_get_critical(const X509_EXTENSION *ex);
        ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ne);

DESCRIPTION
       X509_EXTENSION_set_object() sets the extension type of ex to obj. The
       obj pointer is duplicated internally so obj should be freed up after
       use.

       X509_EXTENSION_set_critical() sets the criticality of ex to crit. If
       crit is zero the extension in non-critical otherwise it is critical.

       X509_EXTENSION_set_data() sets the data in extension ex to data. The
       data pointer is duplicated internally.

       X509_EXTENSION_create_by_NID() creates an extension of type nid,
       criticality crit using data data. The created extension is returned and
       written to *ex reusing or allocating a new extension if necessary so
       *ex should either be NULL or a valid X509_EXTENSION structure it must
       not be an uninitialised pointer.

       X509_EXTENSION_create_by_OBJ() is identical to
       X509_EXTENSION_create_by_NID() except it creates and extension using
       obj instead of a NID.

       X509_EXTENSION_get_object() returns the extension type of ex as an
       ASN1_OBJECT pointer. The returned pointer is an internal value which
       must not be freed up.

       X509_EXTENSION_get_critical() returns the criticality of extension ex
       it returns 1 for critical and 0 for non-critical.

       X509_EXTENSION_get_data() returns the data of extension ex. The
       returned pointer is an internal value which must not be freed up.

NOTES
       These functions manipulate the contents of an extension directly. Most
       applications will want to parse or encode and add an extension: they
       should use the extension encode and decode functions instead such as
       X509_add1_ext_i2d() and X509_get_ext_d2i().

       The data associated with an extension is the extension encoding in an
       ASN1_OCTET_STRING structure.

RETURN VALUES
       X509_EXTENSION_set_object() X509_EXTENSION_set_critical() and
       X509_EXTENSION_set_data() return 1 for success and 0 for failure.

       X509_EXTENSION_create_by_NID() and X509_EXTENSION_create_by_OBJ()
       return an X509_EXTENSION pointer or NULL if an error occurs.

       X509_EXTENSION_get_object() returns an ASN1_OBJECT pointer.

       X509_EXTENSION_get_critical() returns 0 for non-critical and 1 for
       critical.

       X509_EXTENSION_get_data() returns an ASN1_OCTET_STRING pointer.

SEE ALSO
       X509V3_get_d2i(3)

COPYRIGHT
       Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use
       this file except in compliance with the License.  You can obtain a copy
       in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.



3.0.12                            2023-05-07      X509_EXTENSION_set_object(3)