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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_minorFIDO2 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 () 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 () function opens dev as previously allocated using fido_dev_new_with_info().

The () function closes the device represented by dev. If dev is already closed, fido_dev_close() is a NOP.

The () function cancels any pending requests on dev.

The () function returns a pointer to a newly allocated, empty fido_dev_t. If memory cannot be allocated, NULL is returned.

The () function returns a pointer to a newly allocated 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 cannot be allocated, NULL is returned.

The () function releases the memory backing *dev_p, where *dev_p must have been previously allocated by fido_dev_new(). On return, *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 () function can be used to force CTAP2 communication with dev, where dev is an open device.

The () function can be used to force CTAP1 (U2F) communication with dev, where dev is an open device.

The () function returns true if dev is a FIDO2 device.

The () function returns true if dev is a Windows Hello device.

The () function returns true if dev supports CTAP 2.1 Credential Management.

The () function returns true if dev supports CTAP 2.1 Credential Protection.

The () function returns true if dev supports CTAP 2.1 UV token permissions.

The () function returns true if dev supports CTAP 2.0 Client PINs.

The () function returns true if dev supports a built-in user verification method.

The () function returns true if dev has a CTAP 2.0 Client PIN set.

The () function returns true if dev supports built-in user verification and its user verification feature is configured.

The () function returns the CTAPHID protocol version identifier of dev.

The () function returns the CTAPHID build version number of dev.

The () function returns the CTAPHID capabilities flags of dev.

The () function returns the CTAPHID major version number of dev.

The () function returns the CTAPHID minor version number of dev.

For the format and meaning of the CTAPHID parameters returned by functions 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 defined in <fido/err.h> is returned.

SEE ALSO

fido_dev_info_manifest(3), fido_dev_set_io_functions(3), fido_init(3)

May 25, 2018 Linux 6.4.0-150600.21-default