FIDO_DEV_OPEN(3) Library Functions Manual FIDO_DEV_OPEN(3)
NAME
fido_dev_open, fido_dev_open_with_info, fido_dev_close, fido_dev_cancel,
fido_dev_new, fido_dev_new_with_info, fido_dev_free,
fido_dev_force_fido2, fido_dev_force_u2f, fido_dev_is_fido2,
fido_dev_is_winhello, fido_dev_supports_credman,
fido_dev_supports_cred_prot, fido_dev_supports_permissions,
fido_dev_supports_pin, fido_dev_supports_uv, fido_dev_has_pin,
fido_dev_has_uv, fido_dev_protocol, fido_dev_build, fido_dev_flags,
fido_dev_major, fido_dev_minor — FIDO2 device open/close and related
functions
SYNOPSIS
#include <fido.h>
int
fido_dev_open(fido_dev_t *dev, const char *path);
int
fido_dev_open_with_info(fido_dev_t *dev);
int
fido_dev_close(fido_dev_t *dev);
int
fido_dev_cancel(fido_dev_t *dev);
fido_dev_t *
fido_dev_new(void);
fido_dev_t *
fido_dev_new_with_info(const fido_dev_info_t *);
void
fido_dev_free(fido_dev_t **dev_p);
void
fido_dev_force_fido2(fido_dev_t *dev);
void
fido_dev_force_u2f(fido_dev_t *dev);
bool
fido_dev_is_fido2(const fido_dev_t *dev);
bool
fido_dev_is_winhello(const fido_dev_t *dev);
bool
fido_dev_supports_credman(const fido_dev_t *dev);
bool
fido_dev_supports_cred_prot(const fido_dev_t *dev);
bool
fido_dev_supports_permissions(const fido_dev_t *dev);
bool
fido_dev_supports_pin(const fido_dev_t *dev);
bool
fido_dev_supports_uv(const fido_dev_t *dev);
bool
fido_dev_has_pin(const fido_dev_t *dev);
bool
fido_dev_has_uv(const fido_dev_t *dev);
uint8_t
fido_dev_protocol(const fido_dev_t *dev);
uint8_t
fido_dev_build(const fido_dev_t *dev);
uint8_t
fido_dev_flags(const fido_dev_t *dev);
uint8_t
fido_dev_major(const fido_dev_t *dev);
uint8_t
fido_dev_minor(const fido_dev_t *dev);
DESCRIPTION
The fido_dev_open() function opens the device pointed to by path, where
dev is a freshly allocated or otherwise closed fido_dev_t. If dev
claims to be FIDO2, libfido2 will attempt to speak FIDO2 to dev. If
that fails, libfido2 will fallback to U2F unless the
FIDO_DISABLE_U2F_FALLBACK flag was set in fido_init(3).
The fido_dev_open_with_info() function opens dev as previously allocated
using fido_dev_new_with_info().
The fido_dev_close() function closes the device represented by dev. If
dev is already closed, fido_dev_close() is a NOP.
The fido_dev_cancel() function cancels any pending requests on dev.
The fido_dev_new() function returns a pointer to a newly allocated,
empty fido_dev_t. If memory cannot be allocated, NULL is returned.
The fido_dev_new_with_info() function returns a pointer to a newly allo-
cated fido_dev_t with fido_dev_info_t parameters, for use with
fido_dev_info_manifest(3) and fido_dev_open_with_info(). If memory can-
not be allocated, NULL is returned.
The fido_dev_free() function releases the memory backing *dev_p, where
*dev_p must have been previously allocated by fido_dev_new(). On re-
turn, *dev_p is set to NULL. Either dev_p or *dev_p may be NULL, in
which case fido_dev_free() is a NOP.
The fido_dev_force_fido2() function can be used to force CTAP2 communi-
cation with dev, where dev is an open device.
The fido_dev_force_u2f() function can be used to force CTAP1 (U2F) com-
munication with dev, where dev is an open device.
The fido_dev_is_fido2() function returns true if dev is a FIDO2 device.
The fido_dev_is_winhello() function returns true if dev is a Windows
Hello device.
The fido_dev_supports_credman() function returns true if dev supports
CTAP 2.1 Credential Management.
The fido_dev_supports_cred_prot() function returns true if dev supports
CTAP 2.1 Credential Protection.
The fido_dev_supports_permissions() function returns true if dev sup-
ports CTAP 2.1 UV token permissions.
The fido_dev_supports_pin() function returns true if dev supports CTAP
2.0 Client PINs.
The fido_dev_supports_uv() function returns true if dev supports a
built-in user verification method.
The fido_dev_has_pin() function returns true if dev has a CTAP 2.0
Client PIN set.
The fido_dev_has_uv() function returns true if dev supports built-in
user verification and its user verification feature is configured.
The fido_dev_protocol() function returns the CTAPHID protocol version
identifier of dev.
The fido_dev_build() function returns the CTAPHID build version number
of dev.
The fido_dev_flags() function returns the CTAPHID capabilities flags of
dev.
The fido_dev_major() function returns the CTAPHID major version number
of dev.
The fido_dev_minor() function returns the CTAPHID minor version number
of dev.
For the format and meaning of the CTAPHID parameters returned by func-
tions above, please refer to the FIDO Client to Authenticator Protocol
(CTAP) specification.
RETURN VALUES
On success, fido_dev_open(), fido_dev_open_with_info(), and
fido_dev_close() return FIDO_OK. On error, a different error code de-
fined in <fido/err.h> is returned.
SEE ALSO
fido_dev_info_manifest(3), fido_dev_set_io_functions(3), fido_init(3)
Debian May 25, 2018 FIDO_DEV_OPEN(3)
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