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X509_GET_PUBKEY(3)		    OpenSSL		    X509_GET_PUBKEY(3)

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>.

1.1.1k				  2021-03-25		    X509_GET_PUBKEY(3)
NAME | SYNOPSIS | DESCRIPTION | NOTES | RETURN VALUES | SEE ALSO | COPYRIGHT

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