EVP_PKEY_GET_GROUP_NAME(3ossl)

✨ EVP_PKEY_get_group_name — get group name of a key ✨

okay so bestie, welcome to EVP_PKEY_get_group_name(3ossl), a little OpenSSL moment that lives in <openssl/evp.h> and answers exactly one iconic question: what's the group name of this key? 💅

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🫶 SYNOPSIS 🫶

#include <openssl/evp.h>

int EVP_PKEY_get_group_name(EVP_PKEY *pkey, char *gname, size_t gname_sz,
                            size_t *gname_len);

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💖 DESCRIPTION 💖

so EVP_PKEY_get_group_name() takes your pkey and fills in the group name of it into gname, up to at most gname_sz bytes including the ending NUL byte, and then assigns *gname_len the actual length of the name not including the NUL byte — but only if pkey's key type supports it, iykyk. 🌸

the cute part? gname and gname_len can each individually be NULL, and in that case they just won't get filled in or assigned. no drama, no crash. ✨

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🦋 NOTES 🦋

ngl, among the standard OpenSSL key types, this is only supported for DH, EC and SM2 keys. other providers may support this for additional key types though, so don't come for them. 👑

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🔥 RETURN VALUES 🔥

EVP_PKEY_get_group_name() returns 1 if the group name could be filled in, otherwise 0. that's it, that's the whole vibe check. 💀

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🎀 HISTORY 🎀

this function was added in OpenSSL 3.0. periodt. ⭐

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💜 COPYRIGHT 💜

Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (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>.

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and that's the whole page bestie, no cap — brought to you by OpenSSL 3.5.6, dated 2026-04-07, filed under EVP_PKEY_GET_GROUP_NAME(3ossl) 🧚💖 go get those group names slay 🫶🌈