Provided by: fido2-tools_1.14.0-1build3_amd64 
NAME
fido2-token — find and manage a FIDO2 authenticator
SYNOPSIS
fido2-token -C [-d] device
fido2-token -D [-d] -i cred_id device
fido2-token -D -b [-d] -k key_path device
fido2-token -D -b [-d] -n rp_id [-i cred_id] device
fido2-token -D -e [-d] -i template_id device
fido2-token -D -u [-d] device
fido2-token -G -b [-d] -k key_path blob_path device
fido2-token -G -b [-d] -n rp_id [-i cred_id] blob_path device
fido2-token -I [-cd] [-k rp_id -i cred_id] device
fido2-token -L [-bder] [-k rp_id] [device]
fido2-token -R [-d] device
fido2-token -S [-adefu] device
fido2-token -S [-d] -i template_id -n template_name device
fido2-token -S [-d] -l pin_length device
fido2-token -S -b [-d] -k key_path blob_path device
fido2-token -S -b [-d] -n rp_id [-i cred_id] blob_path device
fido2-token -S -c [-d] -i cred_id -k user_id -n name -p display_name device
fido2-token -S -m rp_id device
fido2-token -V
DESCRIPTION
fido2-token manages a FIDO2 authenticator.
The options are as follows:
-C device
Changes the PIN of device. The user will be prompted for the current and new PINs.
-D -i id device
Deletes the resident credential specified by id from device, where id is the credential's
base64-encoded id. The user will be prompted for the PIN.
-D -b -k key_path device
Deletes a “largeBlob” encrypted with key_path from device, where key_path holds the blob's
base64-encoded 32-byte AES-256 GCM encryption key. A PIN or equivalent user-verification gesture
is required.
-D -b -n rp_id [-i cred_id] device
Deletes a “largeBlob” corresponding to rp_id from device. If rp_id has multiple credentials
enrolled on device, the credential ID must be specified using -i cred_id, where cred_id is a
base64-encoded blob. A PIN or equivalent user-verification gesture is required.
-D -e -i id device
Deletes the biometric enrollment specified by id from device, where id is the enrollment's
template base64-encoded id. The user will be prompted for the PIN.
-D -u device
Disables the CTAP 2.1 “user verification always” feature on device.
-G -b -k key_path blob_path device
Gets a CTAP 2.1 “largeBlob” encrypted with key_path from device, where key_path holds the blob's
base64-encoded 32-byte AES-256 GCM encryption key. The blob is written to blob_path. A PIN or
equivalent user-verification gesture is required.
-G -b -n rp_id [-i cred_id] blob_path device
Gets a CTAP 2.1 “largeBlob” associated with rp_id from device. If rp_id has multiple credentials
enrolled on device, the credential ID must be specified using -i cred_id, where cred_id is a
base64-encoded blob. The blob is written to blob_path. A PIN or equivalent user-verification
gesture is required.
-I device
Retrieves information on device.
-I -c device
Retrieves resident credential metadata from device. The user will be prompted for the PIN.
-I -k rp_id -i cred_id device
Prints the credential id (base64-encoded) and public key (PEM encoded) of the resident credential
specified by rp_id and cred_id, where rp_id is a UTF-8 relying party id, and cred_id is a
base64-encoded credential id. The user will be prompted for the PIN.
-L Produces a list of authenticators found by the operating system.
-L -b device
Produces a list of CTAP 2.1 “largeBlobs” on device. A PIN or equivalent user-verification
gesture is required.
-L -e device
Produces a list of biometric enrollments on device. The user will be prompted for the PIN.
-L -r device
Produces a list of relying parties with resident credentials on device. The user will be
prompted for the PIN.
-L -k rp_id device
Produces a list of resident credentials corresponding to relying party rp_id on device. The user
will be prompted for the PIN.
-R Performs a reset on device. fido2-token will NOT prompt for confirmation.
-S Sets the PIN of device. The user will be prompted for the PIN.
-S -a device
Enables CTAP 2.1 Enterprise Attestation on device.
-S -b -k key_path blob_path device
Sets a CTAP 2.1 “largeBlob” encrypted with key_path on device, where key_path holds the blob's
base64-encoded 32-byte AES-256 GCM encryption key. The blob is read from blob_path. A PIN or
equivalent user-verification gesture is required.
-S -b -n rp_id [-i cred_id] blob_path device
Sets a CTAP 2.1 “largeBlob” associated with rp_id on device. The blob is read from blob_path.
If rp_id has multiple credentials enrolled on device, the credential ID must be specified using
-i cred_id, where cred_id is a base64-encoded blob. A PIN or equivalent user-verification
gesture is required.
-S -c -i cred_id -k user_id -n name -p display_name device
Sets the name and display_name attributes of the resident credential identified by cred_id and
user_id, where name and display_name are UTF-8 strings and cred_id and user_id are base64-encoded
blobs. A PIN or equivalent user-verification gesture is required.
-S -e device
Performs a new biometric enrollment on device. The user will be prompted for the PIN.
-S -e -i template_id -n template_name device
Sets the friendly name of the biometric enrollment specified by template_id to template_name on
device, where template_id is base64-encoded and template_name is a UTF-8 string. The user will
be prompted for the PIN.
-S -f device
Forces a PIN change on device. The user will be prompted for the PIN.
-S -l pin_length device
Sets the minimum PIN length of device to pin_length. The user will be prompted for the PIN.
-S -m rp_id device
Sets the list of relying party IDs that are allowed to retrieve the minimum PIN length of device.
Multiple IDs may be specified, separated by commas. The user will be prompted for the PIN.
-S -u device
Enables the CTAP 2.1 “user verification always” feature on device.
-V Prints version information.
-d Causes fido2-token to emit debugging output on stderr.
If a tty is available, fido2-token will use it to prompt for PINs. Otherwise, stdin is used.
fido2-token exits 0 on success and 1 on error.
SEE ALSO
fido2-assert(1), fido2-cred(1)
CAVEATS
The actual user-flow to perform a reset is outside the scope of the FIDO2 specification, and may
therefore vary depending on the authenticator. Yubico authenticators do not allow resets after 5 seconds
from power-up, and expect a reset to be confirmed by the user through touch within 30 seconds.
An authenticator's path may contain spaces.
Resident credentials are called “discoverable credentials” in CTAP 2.1.
Whether the CTAP 2.1 “user verification always” feature is activated or deactivated after an
authenticator reset is vendor-specific.
Debian April 11, 2022 FIDO2-TOKEN(1)