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.