22

✏️ Editing: EVP_PKEY_get1_EC_KEY.3

.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  \*(C+ will
.\" give a nicer C++.  Capital omega is used to do unbreakable dashes and
.\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "EVP_PKEY_SET1_RSA 3"
.TH EVP_PKEY_SET1_RSA 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
EVP_PKEY_set1_RSA, EVP_PKEY_set1_DSA, EVP_PKEY_set1_DH, EVP_PKEY_set1_EC_KEY, EVP_PKEY_get1_RSA, EVP_PKEY_get1_DSA, EVP_PKEY_get1_DH, EVP_PKEY_get1_EC_KEY, EVP_PKEY_get0_RSA, EVP_PKEY_get0_DSA, EVP_PKEY_get0_DH, EVP_PKEY_get0_EC_KEY, EVP_PKEY_assign_RSA, EVP_PKEY_assign_DSA, EVP_PKEY_assign_DH, EVP_PKEY_assign_EC_KEY, EVP_PKEY_assign_POLY1305, EVP_PKEY_assign_SIPHASH, EVP_PKEY_get0_hmac, EVP_PKEY_get0_poly1305, EVP_PKEY_get0_siphash, EVP_PKEY_type, EVP_PKEY_id, EVP_PKEY_base_id, EVP_PKEY_set_alias_type, EVP_PKEY_set1_engine, EVP_PKEY_get0_engine \- EVP_PKEY assignment functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key);
\& int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key);
\& int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key);
\& int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);
\&
\& RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
\& DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
\& DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey);
\& EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey);
\&
\& const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len);
\& const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len);
\& const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len);
\& RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey);
\& DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey);
\& DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey);
\& EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey);
\&
\& int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key);
\& int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key);
\& int EVP_PKEY_assign_DH(EVP_PKEY *pkey, DH *key);
\& int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);
\& int EVP_PKEY_assign_POLY1305(EVP_PKEY *pkey, ASN1_OCTET_STRING *key);
\& int EVP_PKEY_assign_SIPHASH(EVP_PKEY *pkey, ASN1_OCTET_STRING *key);
\&
\& int EVP_PKEY_id(const EVP_PKEY *pkey);
\& int EVP_PKEY_base_id(const EVP_PKEY *pkey);
\& int EVP_PKEY_type(int type);
\& int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type);
\&
\& ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey);
\& int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *engine);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBEVP_PKEY_set1_RSA()\fR, \fBEVP_PKEY_set1_DSA()\fR, \fBEVP_PKEY_set1_DH()\fR and
\&\fBEVP_PKEY_set1_EC_KEY()\fR set the key referenced by \fBpkey\fR to \fBkey\fR.
.PP
\&\fBEVP_PKEY_get1_RSA()\fR, \fBEVP_PKEY_get1_DSA()\fR, \fBEVP_PKEY_get1_DH()\fR and
\&\fBEVP_PKEY_get1_EC_KEY()\fR return the referenced key in \fBpkey\fR or
\&\fB\s-1NULL\s0\fR if the key is not of the correct type.
.PP
\&\fBEVP_PKEY_get0_hmac()\fR, \fBEVP_PKEY_get0_poly1305()\fR, \fBEVP_PKEY_get0_siphash()\fR,
\&\fBEVP_PKEY_get0_RSA()\fR, \fBEVP_PKEY_get0_DSA()\fR, \fBEVP_PKEY_get0_DH()\fR
and \fBEVP_PKEY_get0_EC_KEY()\fR also return the referenced key in \fBpkey\fR or \fB\s-1NULL\s0\fR
if the key is not of the correct type but the reference count of the
returned key is \fBnot\fR incremented and so must not be freed up after use.
.PP
\&\fBEVP_PKEY_assign_RSA()\fR, \fBEVP_PKEY_assign_DSA()\fR, \fBEVP_PKEY_assign_DH()\fR,
\&\fBEVP_PKEY_assign_EC_KEY()\fR, \fBEVP_PKEY_assign_POLY1305()\fR and
\&\fBEVP_PKEY_assign_SIPHASH()\fR also set the referenced key to \fBkey\fR
however these use the supplied \fBkey\fR internally and so \fBkey\fR
will be freed when the parent \fBpkey\fR is freed.
.PP
\&\fBEVP_PKEY_base_id()\fR returns the type of \fBpkey\fR. For example
an \s-1RSA\s0 key will return \fB\s-1EVP_PKEY_RSA\s0\fR.
.PP
\&\fBEVP_PKEY_id()\fR returns the actual \s-1OID\s0 associated with \fBpkey\fR. Historically keys
using the same algorithm could use different OIDs. For example an \s-1RSA\s0 key could
use the OIDs corresponding to the NIDs \fBNID_rsaEncryption\fR (equivalent to
\&\fB\s-1EVP_PKEY_RSA\s0\fR) or \fBNID_rsa\fR (equivalent to \fB\s-1EVP_PKEY_RSA2\s0\fR). The use of
alternative non-standard OIDs is now rare so \fB\s-1EVP_PKEY_RSA2\s0\fR et al are not
often seen in practice.
.PP
\&\fBEVP_PKEY_type()\fR returns the underlying type of the \s-1NID\s0 \fBtype\fR. For example
EVP_PKEY_type(\s-1EVP_PKEY_RSA2\s0) will return \fB\s-1EVP_PKEY_RSA\s0\fR.
.PP
\&\fBEVP_PKEY_get0_engine()\fR returns a reference to the \s-1ENGINE\s0 handling \fBpkey\fR.
.PP
\&\fBEVP_PKEY_set1_engine()\fR sets the \s-1ENGINE\s0 handling \fBpkey\fR to \fBengine\fR. It
must be called after the key algorithm and components are set up.
If \fBengine\fR does not include an \fB\s-1EVP_PKEY_METHOD\s0\fR for \fBpkey\fR an
error occurs.
.PP
\&\fBEVP_PKEY_set_alias_type()\fR allows modifying a \s-1EVP_PKEY\s0 to use a
different set of algorithms than the default. This is currently used
to support \s-1SM2\s0 keys, which use an identical encoding to \s-1ECDSA.\s0
.SH "NOTES"
.IX Header "NOTES"
In accordance with the OpenSSL naming convention the key obtained
from or assigned to the \fBpkey\fR using the \fB1\fR functions must be
freed as well as \fBpkey\fR.
.PP
\&\fBEVP_PKEY_assign_RSA()\fR, \fBEVP_PKEY_assign_DSA()\fR, \fBEVP_PKEY_assign_DH()\fR,
\&\fBEVP_PKEY_assign_EC_KEY()\fR, \fBEVP_PKEY_assign_POLY1305()\fR
and \fBEVP_PKEY_assign_SIPHASH()\fR are implemented as macros.
.PP
Most applications wishing to know a key type will simply call
\&\fBEVP_PKEY_base_id()\fR and will not care about the actual type:
which will be identical in almost all cases.
.PP
Previous versions of this document suggested using EVP_PKEY_type(pkey\->type)
to determine the type of a key. Since \fB\s-1EVP_PKEY\s0\fR is now opaque this
is no longer possible: the equivalent is EVP_PKEY_base_id(pkey).
.PP
\&\fBEVP_PKEY_set1_engine()\fR is typically used by an \s-1ENGINE\s0 returning an \s-1HSM\s0
key as part of its routine to load a private key.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBEVP_PKEY_set1_RSA()\fR, \fBEVP_PKEY_set1_DSA()\fR, \fBEVP_PKEY_set1_DH()\fR and
\&\fBEVP_PKEY_set1_EC_KEY()\fR return 1 for success or 0 for failure.
.PP
\&\fBEVP_PKEY_get1_RSA()\fR, \fBEVP_PKEY_get1_DSA()\fR, \fBEVP_PKEY_get1_DH()\fR and
\&\fBEVP_PKEY_get1_EC_KEY()\fR return the referenced key or \fB\s-1NULL\s0\fR if
an error occurred.
.PP
\&\fBEVP_PKEY_assign_RSA()\fR, \fBEVP_PKEY_assign_DSA()\fR, \fBEVP_PKEY_assign_DH()\fR,
\&\fBEVP_PKEY_assign_EC_KEY()\fR, \fBEVP_PKEY_assign_POLY1305()\fR
and \fBEVP_PKEY_assign_SIPHASH()\fR return 1 for success and 0 for failure.
.PP
\&\fBEVP_PKEY_base_id()\fR, \fBEVP_PKEY_id()\fR and \fBEVP_PKEY_type()\fR return a key
type or \fBNID_undef\fR (equivalently \fB\s-1EVP_PKEY_NONE\s0\fR) on error.
.PP
\&\fBEVP_PKEY_set1_engine()\fR returns 1 for success and 0 for failure.
.PP
\&\fBEVP_PKEY_set_alias_type()\fR returns 1 for success and 0 for error.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
After loading an \s-1ECC\s0 key, it is possible to convert it to using \s-1SM2\s0
algorithms with EVP_PKEY_set_alias_type:
.PP
.Vb 1
\& EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_new\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2002\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

MR SKB