mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
0789c7d834
Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15381)
68 lines
2.2 KiB
Plaintext
68 lines
2.2 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_PKEY_get_default_digest_nid, EVP_PKEY_get_default_digest_name
|
|
- get default signature digest
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
int EVP_PKEY_get_default_digest_name(EVP_PKEY *pkey,
|
|
char *mdname, size_t mdname_sz);
|
|
int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
EVP_PKEY_get_default_digest_name() fills in the default message digest
|
|
name for the public key signature operations associated with key
|
|
I<pkey> into I<mdname>, up to at most I<mdname_sz> bytes including the
|
|
ending NUL byte. The name could be C<"UNDEF">, signifying that no digest
|
|
should be used.
|
|
|
|
EVP_PKEY_get_default_digest_nid() sets I<pnid> to the default message
|
|
digest NID for the public key signature operations associated with key
|
|
I<pkey>. Note that some signature algorithms (i.e. Ed25519 and Ed448)
|
|
do not use a digest during signing. In this case I<pnid> will be set
|
|
to NID_undef. This function is only reliable for legacy keys, which
|
|
are keys with a B<EVP_PKEY_ASN1_METHOD>; these keys have typically
|
|
been loaded from engines, or created with L<EVP_PKEY_assign_RSA(3)> or
|
|
similar.
|
|
|
|
=head1 NOTES
|
|
|
|
For all current standard OpenSSL public key algorithms SHA256 is returned.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
EVP_PKEY_get_default_digest_name() and EVP_PKEY_get_default_digest_nid()
|
|
both return 1 if the message digest is advisory (that is other digests
|
|
can be used) and 2 if it is mandatory (other digests can not be used).
|
|
They return 0 or a negative value for failure. In particular a return
|
|
value of -2 indicates the operation is not supported by the public key
|
|
algorithm.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<EVP_PKEY_CTX_new(3)>,
|
|
L<EVP_PKEY_sign(3)>,
|
|
L<EVP_PKEY_digestsign_supports_digest(3)>,
|
|
L<EVP_PKEY_verify(3)>,
|
|
L<EVP_PKEY_verify_recover(3)>,
|
|
|
|
=head1 HISTORY
|
|
|
|
This function was added in OpenSSL 1.0.0.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2006-2021 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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|