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4ccad35756
This fixes numerous bugs in documentation in regards to UTF8 params and their sizes. The returned size should always be without the terminating NUL byte. On the other hand on the requestor side the size of the buffer should include the NUL byte if it expects it being included in the returned string. Also make this clear in the EVP_PKEY_get_group_name() documentation which uses utf8 string params under the hood. Fixes #16287 Reviewed-by: Viktor Dukhovni <viktor@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/16296)
47 lines
1.3 KiB
Plaintext
47 lines
1.3 KiB
Plaintext
=pod
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=head1 NAME
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EVP_PKEY_get_group_name - get group name of a key
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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int EVP_PKEY_get_group_name(EVP_PKEY *pkey, char *gname, size_t gname_sz,
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size_t *gname_len);
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=head1 DESCRIPTION
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EVP_PKEY_get_group_name() fills in the group name of the I<pkey> into
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I<gname>, up to at most I<gname_sz> bytes including the ending NUL byte
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and assigns I<*gname_len> the actual length of the name not including
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the NUL byte, if I<pkey>'s key type supports it.
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I<gname> as well as I<gname_len> may individually be NULL, and won't be
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filled in or assigned in that case.
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=head1 NOTES
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Among the standard OpenSSL key types, this is only supported for DH, EC and
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SM2 keys. Other providers may support this for additional key types.
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=head1 RETURN VALUES
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EVP_PKEY_get_group_name() returns 1 if the group name could be filled in,
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otherwise 0.
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=head1 HISTORY
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This function was added in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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