FIDO_CBOR_INFO_NEW(3) BSD Library Functions Manual FIDO_CBOR_INFO_NEW(3)
NAME
fido_cbor_info_new, fido_cbor_info_free, fido_dev_get_cbor_info,
fido_cbor_info_aaguid_ptr, fido_cbor_info_extensions_ptr,
fido_cbor_info_protocols_ptr, fido_cbor_info_transports_ptr,
fido_cbor_info_versions_ptr, fido_cbor_info_options_name_ptr,
fido_cbor_info_options_value_ptr, fido_cbor_info_algorithm_type,
fido_cbor_info_algorithm_cose, fido_cbor_info_algorithm_count,
fido_cbor_info_aaguid_len, fido_cbor_info_extensions_len,
fido_cbor_info_protocols_len, fido_cbor_info_transports_len,
fido_cbor_info_versions_len, fido_cbor_info_options_len,
fido_cbor_info_maxmsgsiz, fido_cbor_info_maxcredbloblen,
fido_cbor_info_maxcredcntlst, fido_cbor_info_maxcredidlen,
fido_cbor_info_fwversion — FIDO2 CBOR Info API
SYNOPSIS
#include <fido.h>
fido_cbor_info_t *
fido_cbor_info_new(void);
void
fido_cbor_info_free(fido_cbor_info_t **ci_p);
int
fido_dev_get_cbor_info(fido_dev_t *dev, fido_cbor_info_t *ci);
const unsigned char *
fido_cbor_info_aaguid_ptr(const fido_cbor_info_t *ci);
char **
fido_cbor_info_extensions_ptr(const fido_cbor_info_t *ci);
const uint8_t *
fido_cbor_info_protocols_ptr(const fido_cbor_info_t *ci);
char **
fido_cbor_info_transports_ptr(const fido_cbor_info_t *ci);
char **
fido_cbor_info_versions_ptr(const fido_cbor_info_t *ci);
char **
fido_cbor_info_options_name_ptr(const fido_cbor_info_t *ci);
const bool *
fido_cbor_info_options_value_ptr(const fido_cbor_info_t *ci);
const char *
fido_cbor_info_algorithm_type(const fido_cbor_info_t *ci, size_t idx);
int
fido_cbor_info_algorithm_cose(const fido_cbor_info_t *ci, size_t idx);
size_t
fido_cbor_info_algorithm_count(const fido_cbor_info_t *ci);
size_t
fido_cbor_info_aaguid_len(const fido_cbor_info_t *ci);
size_t
fido_cbor_info_extensions_len(const fido_cbor_info_t *ci);
size_t
fido_cbor_info_protocols_len(const fido_cbor_info_t *ci);
size_t
fido_cbor_info_transports_len(const fido_cbor_info_t *ci);
size_t
fido_cbor_info_versions_len(const fido_cbor_info_t *ci);
size_t
fido_cbor_info_options_len(const fido_cbor_info_t *ci);
uint64_t
fido_cbor_info_maxmsgsiz(const fido_cbor_info_t *ci);
uint64_t
fido_cbor_info_maxcredbloblen(const fido_cbor_info_t *ci);
uint64_t
fido_cbor_info_maxcredcntlst(const fido_cbor_info_t *ci);
uint64_t
fido_cbor_info_maxcredidlen(const fido_cbor_info_t *ci);
uint64_t
fido_cbor_info_fwversion(const fido_cbor_info_t *ci);
DESCRIPTION
The fido_cbor_info_new() function returns a pointer to a newly allocated,
empty fido_cbor_info_t type. If memory cannot be allocated, NULL is re-
turned.
The fido_cbor_info_free() function releases the memory backing *ci_p,
where *ci_p must have been previously allocated by fido_cbor_info_new().
On return, *ci_p is set to NULL. Either ci_p or *ci_p may be NULL, in
which case fido_cbor_info_free() is a NOP.
The fido_dev_get_cbor_info() function transmits a CTAP_CBOR_GETINFO com-
mand to dev and fills ci with attributes retrieved from the command's re-
sponse. The fido_dev_get_cbor_info() function may block.
The fido_cbor_info_aaguid_ptr(), fido_cbor_info_extensions_ptr(),
fido_cbor_info_protocols_ptr(), fido_cbor_info_transports_ptr(), and
fido_cbor_info_versions_ptr() functions return pointers to the authenti-
cator attestation GUID, supported extensions, PIN protocol, transports,
and CTAP version strings of ci. The corresponding length of a given at-
tribute can be obtained by fido_cbor_info_aaguid_len(),
fido_cbor_info_extensions_len(), fido_cbor_info_protocols_len(),
fido_cbor_info_transports_len(), or fido_cbor_info_versions_len().
The fido_cbor_info_options_name_ptr() and
fido_cbor_info_options_value_ptr() functions return pointers to the array
of option names and their respective values in ci. The length of the op-
tions array is returned by fido_cbor_info_options_len().
The fido_cbor_info_algorithm_count() function returns the number of sup-
ported algorithms in ci. The fido_cbor_info_algorithm_cose() function
returns the COSE identifier of algorithm idx in ci, or 0 if the COSE
identifier is unknown or unset. The fido_cbor_info_algorithm_type()
function returns the type of algorithm idx in ci, or NULL if the type is
unset. Please note that the first algorithm in ci has an idx (index)
value of 0.
The fido_cbor_info_maxmsgsiz() function returns the maximum message size
attribute of ci.
The fido_cbor_info_maxcredbloblen() function returns the maximum
“credBlob” length in bytes supported by the authenticator as reported in
ci.
The fido_cbor_info_maxcredcntlst() function returns the maximum supported
number of credentials in a single credential ID list as reported in ci.
The fido_cbor_info_maxcredidlen() function returns the maximum supported
length of a credential ID as reported in ci.
The fido_cbor_info_fwversion() function returns the firmware version at-
tribute of ci.
A complete example of how to use these functions can be found in the
example/info.c file shipped with libfido2.
RETURN VALUES
The fido_cbor_info_aaguid_ptr(), fido_cbor_info_extensions_ptr(),
fido_cbor_info_protocols_ptr(), fido_cbor_info_transports_ptr(),
fido_cbor_info_versions_ptr(), fido_cbor_info_options_name_ptr(), and
fido_cbor_info_options_value_ptr() functions return NULL if the respec-
tive field in ci is absent. If not NULL, returned pointers are guaran-
teed to exist until any API function that takes ci without the const
qualifier is invoked.
SEE ALSO
fido_dev_open(3)
BSD May 24, 2018 BSD
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