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X509_new(3)                         OpenSSL                        X509_new(3)



NAME
       X509_chain_up_ref, X509_new, X509_free, X509_up_ref - X509 certificate
       ASN1 allocation functions

LIBRARY
       libcrypto, -lcrypto

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>.



1.1.1                             2018-09-17                       X509_new(3)