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EVP_PKEY_GET_DEFAULT_DIGEST_NID(3)  OpenSSL EVP_PKEY_GET_DEFAULT_DIGEST_NID(3)

NAME
       EVP_PKEY_get_default_digest_nid - get default signature digest

SYNOPSIS
	#include <openssl/evp.h>
	int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int	*pnid);

DESCRIPTION
       The EVP_PKEY_get_default_digest_nid() function sets pnid	to the default
       message digest NID for the public key signature operations associated
       with key	pkey. Note that	some signature algorithms (i.e.	Ed25519	and
       Ed448) do not use a digest during signing. In this case pnid will be
       set to NID_undef.

NOTES
       For all current standard	OpenSSL	public key algorithms SHA1 is
       returned.

RETURN VALUES
       The EVP_PKEY_get_default_digest_nid() 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.

SEE ALSO
       EVP_PKEY_CTX_new(3), EVP_PKEY_sign(3), EVP_PKEY_verify(3),
       EVP_PKEY_verify_recover(3),

HISTORY
       This function was first added to	OpenSSL	1.0.0.

COPYRIGHT
       Copyright 2006-2018 The OpenSSL Project Authors.	All Rights Reserved.

       Licensed	under the OpenSSL license (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>.

1.1.1a				  2018-11-20EVP_PKEY_GET_DEFAULT_DIGEST_NID(3)

NAME | SYNOPSIS | DESCRIPTION | NOTES | RETURN VALUES | SEE ALSO | HISTORY | COPYRIGHT

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