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.\" ========================================================================
.\"
.IX Title "EVP_PKEY_GET_GROUP_NAME 3ossl"
.TH EVP_PKEY_GET_GROUP_NAME 3ossl "2023-09-19" "3.0.11" "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_get_group_name \- get group name of a key
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& int EVP_PKEY_get_group_name(EVP_PKEY *pkey, char *gname, size_t gname_sz,
\& size_t *gname_len);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBEVP_PKEY_get_group_name()\fR fills in the group name of the \fIpkey\fR into
\&\fIgname\fR, up to at most \fIgname_sz\fR bytes including the ending \s-1NUL\s0 byte
and assigns \fI*gname_len\fR the actual length of the name not including
the \s-1NUL\s0 byte, if \fIpkey\fR's key type supports it.
\&\fIgname\fR as well as \fIgname_len\fR may individually be \s-1NULL,\s0 and won't be
filled in or assigned in that case.
.SH "NOTES"
.IX Header "NOTES"
Among the standard OpenSSL key types, this is only supported for \s-1DH, EC\s0 and
\&\s-1SM2\s0 keys. Other providers may support this for additional key types.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBEVP_PKEY_get_group_name()\fR returns 1 if the group name could be filled in,
otherwise 0.
.SH "HISTORY"
.IX Header "HISTORY"
This function was added in OpenSSL 3.0.
.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>.
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