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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_get_pubkey</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_get_pubkey, X509_get0_pubkey, X509_set_pubkey, X509_get_X509_PUBKEY, X509_REQ_get_pubkey, X509_REQ_get0_pubkey, X509_REQ_set_pubkey, X509_REQ_get_X509_PUBKEY - get or set certificate or certificate request public key</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <pre> #include <openssl/x509.h></pre> <pre> EVP_PKEY *X509_get_pubkey(X509 *x); EVP_PKEY *X509_get0_pubkey(const X509 *x); int X509_set_pubkey(X509 *x, EVP_PKEY *pkey); X509_PUBKEY *X509_get_X509_PUBKEY(X509 *x);</pre> <pre> EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req); EVP_PKEY *X509_REQ_get0_pubkey(X509_REQ *req); int X509_REQ_set_pubkey(X509_REQ *x, EVP_PKEY *pkey); X509_PUBKEY *X509_REQ_get_X509_PUBKEY(X509_REQ *x);</pre> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>X509_get_pubkey() attempts to decode the public key for certificate <strong>x</strong>. If successful it returns the public key as an <strong>EVP_PKEY</strong> pointer with its reference count incremented: this means the returned key must be freed up after use. X509_get0_pubkey() is similar except it does <strong>not</strong> increment the reference count of the returned <strong>EVP_PKEY</strong> so it must not be freed up after use.</p> <p>X509_get_X509_PUBKEY() returns an internal pointer to the <strong>X509_PUBKEY</strong> structure which encodes the certificate of <strong>x</strong>. The returned value must not be freed up after use.</p> <p>X509_set_pubkey() attempts to set the public key for certificate <strong>x</strong> to <strong>pkey</strong>. The key <strong>pkey</strong> should be freed up after use.</p> <p>X509_REQ_get_pubkey(), X509_REQ_get0_pubkey(), X509_REQ_set_pubkey() and X509_REQ_get_X509_PUBKEY() are similar but operate on certificate request <strong>req</strong>.</p> <p> </p> <hr /> <h1><a name="notes">NOTES</a></h1> <p>The first time a public key is decoded the <strong>EVP_PKEY</strong> structure is cached in the certificate or certificate request itself. Subsequent calls return the cached structure with its reference count incremented to improve performance.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p>X509_get_pubkey(), X509_get0_pubkey(), X509_get_X509_PUBKEY(), X509_REQ_get_pubkey() and X509_REQ_get_X509_PUBKEY() return a public key or <strong>NULL</strong> if an error occurred.</p> <p>X509_set_pubkey() and X509_REQ_set_pubkey() return 1 for success and 0 for failure.</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_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_new(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 2015-2016 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>