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X509_GET_PUBKEY(3ossl) OpenSSL X509_GET_PUBKEY(3ossl)
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(const 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),
Licensed under the Apache License 2.0 (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>.
3.0.11 2023-09-19 X509_GET_PUBKEY(3ossl)