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// Copyright 2019 Robin Krahl <robin.krahl@ireas.org>
// SPDX-License-Identifier: GPL-3.0-or-later
use core::default::Default;
use core::marker::Sized;
use crate::device::CommandStatus;
pub const COMMAND_LEN: usize = 53;
enum_cmd! {
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum CommandId {
GetStatus(GetStatusCommand) = 0,
ReadSlotName(ReadSlotNameCommand) = 2,
}
}
trait RequestData: Sized {
fn from_bytes(data: &[u8]) -> Option<Self>;
}
impl RequestData for () {
fn from_bytes(_data: &[u8]) -> Option<Self> {
Some(())
}
}
trait ResponseData {
fn write_bytes(&self, buf: &mut [u8]);
}
trait Command {
type Request: RequestData;
type Response: ResponseData;
fn execute(data: Self::Request) -> Result<Self::Response, CommandStatus>;
fn execute_raw(data: &[u8], buf: &mut [u8]) -> CommandStatus {
if let Some(request) = Self::Request::from_bytes(data) {
match Self::execute(request) {
Ok(response) => {
response.write_bytes(buf);
CommandStatus::Ok
}
Err(status) => status,
}
} else {
CommandStatus::NotSupported
}
}
}
#[derive(Debug, Default)]
struct GetStatusResponse {
firmware_version_minor: u8,
firmware_version_major: u8,
card_serial: u32,
config_numlock: u8,
config_capslock: u8,
config_enable_user_password: u8,
config_delete_user_password: u8,
buf: [u8; 10],
}
impl ResponseData for GetStatusResponse {
fn write_bytes(&self, buf: &mut [u8]) {
let card_serial = self.card_serial.to_le_bytes();
let data = &[
self.firmware_version_minor,
self.firmware_version_major,
card_serial[0],
card_serial[1],
card_serial[2],
card_serial[3],
self.config_numlock,
self.config_capslock,
self.config_enable_user_password,
self.config_delete_user_password,
];
assert!(buf.len() >= data.len());
buf[..data.len()].copy_from_slice(data);
}
}
#[derive(Debug, Default)]
struct GetStatusCommand {}
impl Command for GetStatusCommand {
type Request = ();
type Response = GetStatusResponse;
fn execute(_data: Self::Request) -> Result<Self::Response, CommandStatus> {
let mut response: Self::Response = Default::default();
response.firmware_version_minor = 1;
Ok(response)
}
}
#[derive(Debug, Default)]
struct ReadSlotNameRequest {
internal_slot_number: u8,
}
impl RequestData for ReadSlotNameRequest {
fn from_bytes(data: &[u8]) -> Option<Self> {
if data.is_empty() {
None
} else {
Some(ReadSlotNameRequest {
internal_slot_number: data[0],
})
}
}
}
#[derive(Debug, Default)]
struct ReadSlotNameResponse {
slot_name: [u8; 15],
}
impl ResponseData for ReadSlotNameResponse {
fn write_bytes(&self, buf: &mut [u8]) {
assert!(buf.len() >= self.slot_name.len());
buf[..self.slot_name.len()].copy_from_slice(&self.slot_name)
}
}
#[derive(Debug, Default)]
struct ReadSlotNameCommand {}
impl Command for ReadSlotNameCommand {
type Request = ReadSlotNameRequest;
type Response = ReadSlotNameResponse;
fn execute(data: Self::Request) -> Result<Self::Response, CommandStatus> {
if data.internal_slot_number != 0x20 {
Err(CommandStatus::SlotNotProgrammed)
} else {
let mut response: Self::Response = Default::default();
response.slot_name[0] = 0x74; // t
response.slot_name[1] = 0x65; // e
response.slot_name[2] = 0x73; // s
response.slot_name[3] = 0x74; // t
Ok(response)
}
}
}
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