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use crate::error::{Error, LibraryError};
/// The configuration for a Nitrokey.
#[derive(Clone, Copy, Debug, PartialEq)]
pub struct Config {
/// If set, the stick will generate a code from the HOTP slot with the given number if numlock
/// is pressed. The slot number must be 0, 1 or 2.
pub numlock: Option<u8>,
/// If set, the stick will generate a code from the HOTP slot with the given number if capslock
/// is pressed. The slot number must be 0, 1 or 2.
pub capslock: Option<u8>,
/// If set, the stick will generate a code from the HOTP slot with the given number if
/// scrollock is pressed. The slot number must be 0, 1 or 2.
pub scrollock: Option<u8>,
/// If set, OTP generation using [`get_hotp_code`][] or [`get_totp_code`][] requires user
/// authentication. Otherwise, OTPs can be generated without authentication.
///
/// [`get_hotp_code`]: trait.ProvideOtp.html#method.get_hotp_code
/// [`get_totp_code`]: trait.ProvideOtp.html#method.get_totp_code
pub user_password: bool,
}
#[derive(Debug)]
pub struct RawConfig {
pub numlock: u8,
pub capslock: u8,
pub scrollock: u8,
pub user_password: bool,
}
fn config_otp_slot_to_option(value: u8) -> Option<u8> {
if value < 3 {
Some(value)
} else {
None
}
}
fn option_to_config_otp_slot(value: Option<u8>) -> Result<u8, Error> {
if let Some(value) = value {
if value < 3 {
Ok(value)
} else {
Err(LibraryError::InvalidSlot.into())
}
} else {
Ok(255)
}
}
impl Config {
/// Constructs a new instance of this struct.
pub fn new(
numlock: Option<u8>,
capslock: Option<u8>,
scrollock: Option<u8>,
user_password: bool,
) -> Config {
Config {
numlock,
capslock,
scrollock,
user_password,
}
}
}
impl RawConfig {
pub fn try_from(config: Config) -> Result<RawConfig, Error> {
Ok(RawConfig {
numlock: option_to_config_otp_slot(config.numlock)?,
capslock: option_to_config_otp_slot(config.capslock)?,
scrollock: option_to_config_otp_slot(config.scrollock)?,
user_password: config.user_password,
})
}
}
impl From<[u8; 5]> for RawConfig {
fn from(data: [u8; 5]) -> Self {
RawConfig {
numlock: data[0],
capslock: data[1],
scrollock: data[2],
user_password: data[3] != 0,
}
}
}
impl Into<Config> for RawConfig {
fn into(self) -> Config {
Config {
numlock: config_otp_slot_to_option(self.numlock),
capslock: config_otp_slot_to_option(self.capslock),
scrollock: config_otp_slot_to_option(self.scrollock),
user_password: self.user_password,
}
}
}
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