FIDO2-TOKEN(1)

FIDO2-TOKEN(1) | General Commands Manual | FIDO2-TOKEN(1)

# 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.

April 11, 2022 | Yubico AB