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<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>X509_new</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@hsxx.drive.ne.jp" /> </head> <body style="background-color: white"> <!-- INDEX BEGIN --> <div name="index"> <p><a name="__index__"></a></p> <ul> <li><a href="#name">NAME</a></li> <li><a href="#synopsis">SYNOPSIS</a></li> <li><a href="#description">DESCRIPTION</a></li> <li><a href="#notes">NOTES</a></li> <li><a href="#return_values">RETURN VALUES</a></li> <li><a href="#see_also">SEE ALSO</a></li> <li><a href="#copyright">COPYRIGHT</a></li> </ul> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>X509_chain_up_ref, X509_new, X509_free, X509_up_ref - X509 certificate ASN1 allocation functions</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <pre> #include <openssl/x509.h></pre> <pre> 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);</pre> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>The X509 ASN1 allocation routines, allocate and free an X509 structure, which represents an X509 certificate.</p> <p>X509_new() allocates and initializes a X509 structure with reference count <strong>1</strong>.</p> <p>X509_free() decrements the reference count of <strong>X509</strong> structure <strong>a</strong> and frees it up if the reference count is zero. If <strong>a</strong> is NULL nothing is done.</p> <p>X509_up_ref() increments the reference count of <strong>a</strong>.</p> <p>X509_chain_up_ref() increases the reference count of all certificates in chain <strong>x</strong> and returns a copy of the stack.</p> <p> </p> <hr /> <h1><a name="notes">NOTES</a></h1> <p>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.</p> <p>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.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p>If the allocation fails, X509_new() returns <strong>NULL</strong> and sets an error code that can be obtained by <em>ERR_get_error(3)</em>. Otherwise it returns a pointer to the newly allocated structure.</p> <p>X509_up_ref() returns 1 for success and 0 for failure.</p> <p>X509_chain_up_ref() returns a copy of the stack or <strong>NULL</strong> if an error occurred.</p> <p> </p> <hr /> <h1><a name="see_also">SEE ALSO</a></h1> <p><em>d2i_X509(3)</em>, <em>ERR_get_error(3)</em>, <em>X509_CRL_get0_by_serial(3)</em>, <em>X509_get0_signature(3)</em>, <em>X509_get_ext_d2i(3)</em>, <em>X509_get_extension_flags(3)</em>, <em>X509_get_pubkey(3)</em>, <em>X509_get_subject_name(3)</em>, <em>X509_get_version(3)</em>, <em>X509_NAME_add_entry_by_txt(3)</em>, <em>X509_NAME_ENTRY_get_object(3)</em>, <em>X509_NAME_get_index_by_NID(3)</em>, <em>X509_NAME_print_ex(3)</em>, <em>X509_sign(3)</em>, <em>X509V3_get_d2i(3)</em>, <em>X509_verify_cert(3)</em></p> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></h1> <p>Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.</p> <p>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 <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>