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.IX Title "EVP_PKEY_get_default_digest 3"
.TH EVP_PKEY_get_default_digest 3 2019-12-20 1.0.2u OpenSSL
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.SH NAME
EVP_PKEY_get_default_digest_nid \- get default signature digest
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 2
\& #include <openssl/evp.h>
\& int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
The \fBEVP_PKEY_get_default_digest_nid()\fR function sets \fBpnid\fR to the default
message digest NID for the public key signature operations associated with key
\&\fBpkey\fR.
.SH NOTES
.IX Header "NOTES"
For all current standard OpenSSL public key algorithms SHA1 is returned.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
The \fBEVP_PKEY_get_default_digest_nid()\fR function returns 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).  It returns 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.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_new\fR\|(3),
\&\fBEVP_PKEY_sign\fR\|(3),
\&\fBEVP_PKEY_verify\fR\|(3),
\&\fBEVP_PKEY_verify_recover\fR\|(3),
.SH HISTORY
.IX Header "HISTORY"
This function was first added to OpenSSL 1.0.0.