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use super::{Command, CommandError, PinUvAuthCommand, RequestCtap2, StatusCode};
use crate::{
crypto::{PinUvAuthParam, PinUvAuthToken},
ctap2::server::UserVerificationRequirement,
errors::AuthenticatorError,
transport::errors::HIDError,
AuthenticatorInfo, FidoDevice,
};
use serde::{ser::SerializeMap, Deserialize, Serialize, Serializer};
use serde_cbor::{de::from_slice, to_vec, Value};
#[derive(Debug, Clone, Deserialize)]
pub struct SetMinPINLength {
/// Minimum PIN length in code points
pub new_min_pin_length: Option<u64>,
/// RP IDs which are allowed to get this information via the minPinLength extension.
/// This parameter MUST NOT be used unless the minPinLength extension is supported.
pub min_pin_length_rpids: Option<Vec<String>>,
/// The authenticator returns CTAP2_ERR_PIN_POLICY_VIOLATION until changePIN is successful.
pub force_change_pin: Option<bool>,
}
impl Serialize for SetMinPINLength {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut map_len = 0;
if self.new_min_pin_length.is_some() {
map_len += 1;
}
if self.min_pin_length_rpids.is_some() {
map_len += 1;
}
if self.force_change_pin.is_some() {
map_len += 1;
}
let mut map = serializer.serialize_map(Some(map_len))?;
if let Some(new_min_pin_length) = self.new_min_pin_length {
map.serialize_entry(&0x01, &new_min_pin_length)?;
}
if let Some(min_pin_length_rpids) = &self.min_pin_length_rpids {
map.serialize_entry(&0x02, &min_pin_length_rpids)?;
}
if let Some(force_change_pin) = self.force_change_pin {
map.serialize_entry(&0x03, &force_change_pin)?;
}
map.end()
}
}
#[derive(Debug, Clone, Deserialize, Serialize)]
pub enum AuthConfigCommand {
EnableEnterpriseAttestation,
ToggleAlwaysUv,
SetMinPINLength(SetMinPINLength),
}
impl AuthConfigCommand {
fn has_params(&self) -> bool {
match self {
AuthConfigCommand::EnableEnterpriseAttestation => false,
AuthConfigCommand::ToggleAlwaysUv => false,
AuthConfigCommand::SetMinPINLength(..) => true,
}
}
}
#[derive(Debug, Serialize)]
pub enum AuthConfigResult {
Success(AuthenticatorInfo),
}
#[derive(Debug)]
pub struct AuthenticatorConfig {
subcommand: AuthConfigCommand, // subCommand currently being requested
pin_uv_auth_param: Option<PinUvAuthParam>, // First 16 bytes of HMAC-SHA-256 of contents using pinUvAuthToken.
}
impl AuthenticatorConfig {
pub(crate) fn new(subcommand: AuthConfigCommand) -> Self {
Self {
subcommand,
pin_uv_auth_param: None,
}
}
}
impl Serialize for AuthenticatorConfig {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
// Need to define how many elements are going to be in the map
// beforehand
let mut map_len = 1;
if self.pin_uv_auth_param.is_some() {
map_len += 2;
}
if self.subcommand.has_params() {
map_len += 1;
}
let mut map = serializer.serialize_map(Some(map_len))?;
match &self.subcommand {
AuthConfigCommand::EnableEnterpriseAttestation => {
map.serialize_entry(&0x01, &0x01)?;
}
AuthConfigCommand::ToggleAlwaysUv => {
map.serialize_entry(&0x01, &0x02)?;
}
AuthConfigCommand::SetMinPINLength(params) => {
map.serialize_entry(&0x01, &0x03)?;
map.serialize_entry(&0x02, ¶ms)?;
}
}
if let Some(ref pin_uv_auth_param) = self.pin_uv_auth_param {
map.serialize_entry(&0x03, &pin_uv_auth_param.pin_protocol.id())?;
map.serialize_entry(&0x04, pin_uv_auth_param)?;
}
map.end()
}
}
impl RequestCtap2 for AuthenticatorConfig {
type Output = ();
fn command(&self) -> Command {
Command::AuthenticatorConfig
}
fn wire_format(&self) -> Result<Vec<u8>, HIDError> {
let output = to_vec(&self).map_err(CommandError::Serializing)?;
trace!("client subcommmand: {:04X?}", &output);
Ok(output)
}
fn handle_response_ctap2<Dev>(
&self,
_dev: &mut Dev,
input: &[u8],
) -> Result<Self::Output, HIDError>
where
Dev: FidoDevice,
{
if input.is_empty() {
return Err(CommandError::InputTooSmall.into());
}
let status: StatusCode = input[0].into();
if status.is_ok() {
Ok(())
} else {
let msg = if input.len() > 1 {
let data: Value = from_slice(&input[1..]).map_err(CommandError::Deserializing)?;
Some(data)
} else {
None
};
Err(CommandError::StatusCode(status, msg).into())
}
}
fn send_to_virtual_device<Dev: crate::VirtualFidoDevice>(
&self,
_dev: &mut Dev,
) -> Result<Self::Output, HIDError> {
unimplemented!()
}
}
impl PinUvAuthCommand for AuthenticatorConfig {
fn set_pin_uv_auth_param(
&mut self,
pin_uv_auth_token: Option<PinUvAuthToken>,
) -> Result<(), AuthenticatorError> {
let mut param = None;
if let Some(token) = pin_uv_auth_token {
// pinUvAuthParam (0x04): the result of calling
// authenticate(pinUvAuthToken, 32×0xff || 0x0d || uint8(subCommand) || subCommandParams).
let mut data = vec![0xff; 32];
data.push(0x0D);
match &self.subcommand {
AuthConfigCommand::EnableEnterpriseAttestation => {
data.push(0x01);
}
AuthConfigCommand::ToggleAlwaysUv => {
data.push(0x02);
}
AuthConfigCommand::SetMinPINLength(params) => {
data.push(0x03);
data.extend(to_vec(params).map_err(CommandError::Serializing)?);
}
}
param = Some(token.derive(&data).map_err(CommandError::Crypto)?);
}
self.pin_uv_auth_param = param;
Ok(())
}
fn can_skip_user_verification(
&mut self,
authinfo: &AuthenticatorInfo,
_uv_req: UserVerificationRequirement,
) -> bool {
!authinfo.device_is_protected()
}
fn set_uv_option(&mut self, _uv: Option<bool>) {
/* No-op */
}
fn get_pin_uv_auth_param(&self) -> Option<&PinUvAuthParam> {
self.pin_uv_auth_param.as_ref()
}
fn get_rp_id(&self) -> Option<&String> {
None
}
}
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