X509_NEW
Section: OpenSSL (3)
Updated: 2021-03-26
Page Index
NAME
X509_chain_up_ref, X509_new, X509_free, X509_up_ref - X509 certificate ASN1 allocation functions
SYNOPSIS
#include <openssl/x509.h>
X509 *X509_new(void);
void X509_free(X509 *a);
int X509_up_ref(X509 *a);
STACK_OF(X509) *X509_chain_up_ref(STACK_OF(X509) *x);
DESCRIPTION
The X509
ASN1 allocation routines, allocate and free an
X509 structure, which represents an X509 certificate.
X509_new() allocates and initializes a X509 structure with reference count
1.
X509_free() decrements the reference count of X509 structure a and
frees it up if the reference count is zero. If a is NULL nothing is done.
X509_up_ref() increments the reference count of a.
X509_chain_up_ref() increases the reference count of all certificates in
chain x and returns a copy of the stack.
NOTES
The function
X509_up_ref() if useful if a certificate structure is being
used by several different operations each of which will free it up after
use: this avoids the need to duplicate the entire certificate structure.
The function X509_chain_up_ref() doesn't just up the reference count of
each certificate it also returns a copy of the stack, using sk_X509_dup(),
but it serves a similar purpose: the returned chain persists after the
original has been freed.
RETURN VALUES
If the allocation fails,
X509_new() returns
NULL and sets an error
code that can be obtained by
ERR_get_error(3).
Otherwise it returns a pointer to the newly allocated structure.
X509_up_ref() returns 1 for success and 0 for failure.
X509_chain_up_ref() returns a copy of the stack or NULL if an error
occurred.
SEE ALSO
d2i_X509(3),
ERR_get_error(3),
X509_CRL_get0_by_serial(3),
X509_get0_signature(3),
X509_get_ext_d2i(3),
X509_get_extension_flags(3),
X509_get_pubkey(3),
X509_get_subject_name(3),
X509_get_version(3),
X509_NAME_add_entry_by_txt(3),
X509_NAME_ENTRY_get_object(3),
X509_NAME_get_index_by_NID(3),
X509_NAME_print_ex(3),
X509_sign(3),
X509V3_get_d2i(3),
X509_verify_cert(3)
COPYRIGHT
Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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>.