X509_GET_PUBKEY
Section: OpenSSL (3)
Updated: 2020-07-28
Page Index
NAME
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
SYNOPSIS
#include <openssl/x509.h>
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);
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);
DESCRIPTION
X509_get_pubkey() attempts to decode the public key for certificate
x. If
successful it returns the public key as an
EVP_PKEY 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
not increment
the reference count of the returned
EVP_PKEY so it must not be freed up
after use.
X509_get_X509_PUBKEY() returns an internal pointer to the X509_PUBKEY
structure which encodes the certificate of x. The returned value
must not be freed up after use.
X509_set_pubkey() attempts to set the public key for certificate x to
pkey. The key pkey should be freed up after use.
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 req.
NOTES
The first time a public key is decoded the
EVP_PKEY structure is
cached in the certificate or certificate request itself. Subsequent calls
return the cached structure with its reference count incremented to
improve performance.
RETURN VALUES
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
NULL if an error occurred.
X509_set_pubkey() and X509_REQ_set_pubkey() return 1 for success and 0
for failure.
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_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_new(3),
X509_sign(3),
X509V3_get_d2i(3),
X509_verify_cert(3)
COPYRIGHT
Copyright 2015-2016 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>.