EVP_PKEY_get_default_digest
Section: OpenSSL (3)
Updated: 2019-02-26
Page Index
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.
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.