FIDO_CRED_EXCLUDE(3) Library Functions Manual FIDO_CRED_EXCLUDE(3)
NAME
fido_cred_exclude, fido_cred_empty_exclude_list — manage exclude lists
in a FIDO2 credential
SYNOPSIS
#include <fido.h>
int
fido_cred_exclude(fido_cred_t *cred, const unsigned char *ptr,
size_t len);
int
fido_cred_empty_exclude_list(fido_cred_t *cred);
DESCRIPTION
The fido_cred_exclude() function adds ptr to the list of credentials ex-
cluded by cred, where ptr points to a credential ID of len bytes. A
copy of ptr is made, and no references to the passed pointer are kept.
If fido_cred_exclude() fails, the existing list of excluded credentials
is preserved.
If fido_cred_exclude returns success and cred is later passed to
fido_dev_make_cred(3) on a device that contains the credential denoted
by ptr, then fido_dev_make_cred(3) will fail.
For the format of a FIDO2 credential ID, please refer to the Web Authen-
tication (webauthn) standard.
The fido_cred_empty_exclude_list() function empties the list of creden-
tials excluded by cred.
RETURN VALUES
The error codes returned by fido_cred_exclude() and
fido_cred_empty_exclude_list() are defined in <fido/err.h>. On success,
FIDO_OK is returned.
SEE ALSO
fido_cred_new(3), fido_cred_set_authdata(3), fido_dev_make_cred(3)
Debian December 2, 2022 FIDO_CRED_EXCLUDE(3)
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