X509_NEW - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEX509_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);
DESCRIPTIONThe 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.
NOTESThe 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 VALUESIf 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 ALSOd2i_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)
COPYRIGHTCopyright 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>. 0
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