emerald_hwkey/
errors.rs

1use std::{io, fmt, error};
2
3#[derive(Debug, PartialEq, Clone)]
4pub enum HWKeyError {
5    /// Device is unavailable
6    Unavailable,
7
8    /// Device is unsupported
9    Unsupported(u16),
10
11    DeviceLocked,
12
13    /// Received an empty frame. Usually means a timeout.
14    EmptyResponse,
15    /// An unsupported cipher
16    CryptoError(String),
17    /// Error from HID communication
18    CommError(String),
19    /// Communication encoding error
20    EncodingError(String),
21    /// Something else
22    OtherError(String),
23    /// On invalid input to the library
24    InputError(String),
25
26    InvalidResponse(ResponseError)
27}
28
29#[derive(Debug, PartialEq, Clone, Copy)]
30pub enum ResponseError {
31    ShortLedgerVersion,
32}
33
34impl From<io::Error> for HWKeyError {
35    fn from(err: io::Error) -> Self {
36        HWKeyError::CommError(err.to_string())
37    }
38}
39
40impl From<&str> for HWKeyError {
41    fn from(err: &str) -> Self {
42        HWKeyError::OtherError(err.to_string())
43    }
44}
45
46impl From<hidapi::HidError> for HWKeyError {
47    fn from(err: hidapi::HidError) -> Self {
48        HWKeyError::CommError(err.to_string())
49    }
50}
51
52impl fmt::Display for HWKeyError {
53    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
54        match *self {
55            HWKeyError::Unavailable => write!(f, "HWKey Unavailable"),
56            HWKeyError::Unsupported(pid) => write!(f, "HWKey Unsupported device with PID: 0x{:04x}", pid),
57            HWKeyError::EmptyResponse => write!(f, "HWKey no answer"),
58            HWKeyError::CryptoError(ref str) => write!(f, "HWKey error: {}", str),
59            HWKeyError::CommError(ref str) => write!(f, "Communication protocol error: {}", str),
60            HWKeyError::EncodingError(ref str) => write!(f, "Encoding error: {}", str),
61            HWKeyError::OtherError(ref str) => write!(f, "HWKey other error: {}", str),
62            HWKeyError::InputError(ref str) => write!(f, "HWKey invalid input: {}", str),
63            HWKeyError::InvalidResponse(e) => write!(f, "HWKey invalid resp: {:?}", e),
64            HWKeyError::DeviceLocked => write!(f, "HWKey Locked"),
65        }
66    }
67}
68
69impl error::Error for HWKeyError {
70    fn description(&self) -> &str {
71        "HWKey error"
72    }
73
74    fn cause(&self) -> Option<&dyn error::Error> {
75        match *self {
76            HWKeyError::InvalidResponse(ref e) => Some(e),
77            _ => None,
78        }
79    }
80}
81
82impl fmt::Display for ResponseError {
83    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
84        match *self {
85            ResponseError::ShortLedgerVersion => write!(f, "Short Ledger version response"),
86        }
87    }
88}
89
90impl error::Error for ResponseError {
91    fn description(&self) -> &str {
92        "Response error"
93    }
94
95    fn cause(&self) -> Option<&dyn error::Error> {
96        None
97    }
98}
emerald_hwkey/errors.rs

emerald_hwkey/
errors.rs
