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.\" ========================================================================
.\"
.IX Title "EVP_PKEY_SET_TYPE 3SSL"
.TH EVP_PKEY_SET_TYPE 3SSL "2023-10-23" "3.0.11" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
EVP_PKEY_set_type, EVP_PKEY_set_type_str, EVP_PKEY_set_type_by_keymgmt
\&\- functions to change the EVP_PKEY type
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& int EVP_PKEY_set_type(EVP_PKEY *pkey, int type);
\& int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len);
\& int EVP_PKEY_set_type_by_keymgmt(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
All the functions described here behave the same in so far that they
clear all the previous key data and methods from \fIpkey\fR, and reset it
to be of the type of key given by the different arguments.  If
\&\fIpkey\fR is \s-1NULL,\s0 these functions will still return the same return
values as if it wasn't.
.PP
\&\fBEVP_PKEY_set_type()\fR initialises \fIpkey\fR to contain an internal legacy
key.  When doing this, it finds a \s-1\fBEVP_PKEY_ASN1_METHOD\s0\fR\|(3)
corresponding to \fItype\fR, and associates \fIpkey\fR with the findings.
It is an error if no \s-1\fBEVP_PKEY_ASN1_METHOD\s0\fR\|(3) could be found for
\&\fItype\fR.
.PP
\&\fBEVP_PKEY_set_type_str()\fR initialises \fIpkey\fR to contain an internal legacy
key. When doing this, it finds a \s-1\fBEVP_PKEY_ASN1_METHOD\s0\fR\|(3)
corresponding to \fIstr\fR that has then length \fIlen\fR, and associates
\&\fIpkey\fR with the findings.
It is an error if no \s-1\fBEVP_PKEY_ASN1_METHOD\s0\fR\|(3) could be found for
\&\fItype\fR.
.PP
For both \fBEVP_PKEY_set_type()\fR and \fBEVP_PKEY_set_type_str()\fR, \fIpkey\fR gets
a numeric type, which can be retrieved with \fBEVP_PKEY_get_id\fR\|(3).  This
numeric type is taken from the \s-1\fBEVP_PKEY_ASN1_METHOD\s0\fR\|(3) that was
found, and is equal to or closely related to \fItype\fR in the case of
\&\fBEVP_PKEY_set_type()\fR, or related to \fIstr\fR in the case of
\&\fBEVP_PKEY_set_type_str()\fR.
.PP
\&\fBEVP_PKEY_set_type_by_keymgmt()\fR initialises \fIpkey\fR to contain an
internal provider side key.  When doing this, it associates \fIpkey\fR
with \fIkeymgmt\fR.  For keys initialised like this, the numeric type
retrieved with \fBEVP_PKEY_get_id\fR\|(3) will always be \fB\s-1EVP_PKEY_NONE\s0\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
All functions described here return 1 if successful, or 0 on error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_assign\fR\|(3), \fBEVP_PKEY_get_id\fR\|(3), \fBEVP_PKEY_get0_RSA\fR\|(3),
\&\fBEVP_PKEY_copy_parameters\fR\|(3), \s-1\fBEVP_PKEY_ASN1_METHOD\s0\fR\|(3),
\&\s-1\fBEVP_KEYMGMT\s0\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2020\-2021 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (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>.