.\" $OpenBSD: X509_PKEY_new.3,v 1.1 2021/10/19 10:39:33 schwarze Exp $
.\"
.\" Copyright (c) 2021 Ingo Schwarze <schwarze@openbsd.org>
.\"
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.Dd $Mdocdate: October 19 2021 $
.Dt X509_PKEY_NEW 3
.Os
.Sh NAME
.Nm X509_PKEY_new ,
.Nm X509_PKEY_free
.Nd X.509 private key wrapper object
.Sh SYNOPSIS
.In openssl/x509.h
.Ft X509_PKEY *
.Fn X509_PKEY_new void
.Ft void
.Fn X509_PKEY_free "X509_PKEY *wrapper"
.Sh DESCRIPTION
.Vt X509_PKEY
is a reference-counted wrapper object that can store
.Bl -bullet -width 1n
.It
a pointer to an encrypted and ASN.1-encoded private key
.It
a pointer to an
.Vt EVP_PKEY
object representing the same key in decrypted form
.It
a pointer to an
.Vt X509_ALGOR
object identifying the algorithm used by the key
.El
.Pp
The object may contain only the encrypted key or only the decrypted
key or both.
.Pp
.Vt X509_PKEY
is used as a sub-object of the
.Vt X509_INFO
object created by
.Xr PEM_X509_INFO_read_bio 3
if the PEM file contains any RSA, DSA, or EC PRIVATE KEY object.
.Pp
.Fn X509_PKEY_new
allocates and initializes an empty
.Vt X509_PKEY
object and sets its reference count to 1.
.Pp
.Fn X509_PKEY_free
decrements the reference count of the
.Fa wrapper
object by 1.
If the reference count reaches 0,
it frees all internal objects allocated by the
.Fa wrapper
as well as the storage needed for the
.Fa wrapper
object itself.
If
.Fa wrapper
is a
.Dv NULL
pointer, no action occurs.
.Sh RETURN VALUES
.Fn X509_PKEY_new
returns a pointer to the new
.Vt X509_PKEY
object or
.Dv NULL
if memory allocation fails.
.Sh SEE ALSO
.Xr EVP_PKEY_new 3 ,
.Xr PEM_X509_INFO_read 3 ,
.Xr X509_INFO_new 3
.Sh HISTORY
.Fn X509_PKEY_new
and
.Fn X509_PKEY_free
first appeared in SSLeay 0.6.0 and have been available since
.Ox 2.4 .