1238384Sjkim=pod
2238384Sjkim
3238384Sjkim=head1 NAME
4238384Sjkim
5238384SjkimEVP_PKEY_get_default_digest_nid - get default signature digest
6238384Sjkim
7238384Sjkim=head1 SYNOPSIS
8238384Sjkim
9238384Sjkim #include <openssl/evp.h>
10238384Sjkim int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);
11238384Sjkim
12238384Sjkim=head1 DESCRIPTION
13238384Sjkim
14238384SjkimThe EVP_PKEY_get_default_digest_nid() function sets B<pnid> to the default
15238384Sjkimmessage digest NID for the public key signature operations associated with key
16238384SjkimB<pkey>.
17238384Sjkim
18238384Sjkim=head1 NOTES
19238384Sjkim
20238384SjkimFor all current standard OpenSSL public key algorithms SHA1 is returned.
21238384Sjkim
22238384Sjkim=head1 RETURN VALUES
23238384Sjkim
24238384SjkimThe EVP_PKEY_get_default_digest_nid() function returns 1 if the message digest
25238384Sjkimis advisory (that is other digests can be used) and 2 if it is mandatory (other
26238384Sjkimdigests can not be used).  It returns 0 or a negative value for failure. In
27238384Sjkimparticular a return value of -2 indicates the operation is not supported by the
28238384Sjkimpublic key algorithm.
29238384Sjkim
30238384Sjkim=head1 SEE ALSO
31238384Sjkim
32238384SjkimL<EVP_PKEY_CTX_new(3)|EVP_PKEY_CTX_new(3)>,
33238384SjkimL<EVP_PKEY_sign(3)|EVP_PKEY_sign(3)>,
34238384SjkimL<EVP_PKEY_verify(3)|EVP_PKEY_verify(3)>,
35246772SjkimL<EVP_PKEY_verify_recover(3)|EVP_PKEY_verify_recover(3)>,
36238384Sjkim
37238384Sjkim=head1 HISTORY
38238384Sjkim
39238384SjkimThis function was first added to OpenSSL 1.0.0.
40238384Sjkim
41238384Sjkim=cut
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