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use std::borrow;
use std::error;
use std::fmt;
use std::os::raw;
/// Error types returned by Nitrokey device or by the library.
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum CommandError {
/// A packet with a wrong checksum has been sent or received.
WrongCrc,
/// A command tried to access an OTP slot that does not exist.
WrongSlot,
/// A command tried to generate an OTP on a slot that is not configured.
SlotNotProgrammed,
/// The provided password is wrong.
WrongPassword,
/// You are not authorized for this command or provided a wrong temporary
/// password.
NotAuthorized,
/// An error occurred when getting or setting the time.
Timestamp,
/// You did not provide a name for the OTP slot.
NoName,
/// This command is not supported by this device.
NotSupported,
/// This command is unknown.
UnknownCommand,
/// AES decryption failed.
AesDecryptionFailed,
/// An unknown error occurred.
Unknown(i64),
/// An unspecified error occurred.
Undefined,
/// You passed a string containing a null byte.
InvalidString,
/// A supplied string exceeded a length limit.
StringTooLong,
/// You passed an invalid slot.
InvalidSlot,
/// The supplied string was not in hexadecimal format.
InvalidHexString,
/// The target buffer was smaller than the source.
TargetBufferTooSmall,
/// An error occurred during random number generation.
RngError,
}
impl CommandError {
fn as_str(&self) -> borrow::Cow<'static, str> {
match *self {
CommandError::WrongCrc => {
"A packet with a wrong checksum has been sent or received".into()
}
CommandError::WrongSlot => "The given OTP slot does not exist".into(),
CommandError::SlotNotProgrammed => "The given OTP slot is not programmed".into(),
CommandError::WrongPassword => "The given password is wrong".into(),
CommandError::NotAuthorized => {
"You are not authorized for this command or provided a wrong temporary \
password"
.into()
}
CommandError::Timestamp => "An error occurred when getting or setting the time".into(),
CommandError::NoName => "You did not provide a name for the OTP slot".into(),
CommandError::NotSupported => "This command is not supported by this device".into(),
CommandError::UnknownCommand => "This command is unknown".into(),
CommandError::AesDecryptionFailed => "AES decryption failed".into(),
CommandError::Unknown(x) => {
borrow::Cow::from(format!("An unknown error occurred ({})", x))
}
CommandError::Undefined => "An unspecified error occurred".into(),
CommandError::InvalidString => "You passed a string containing a null byte".into(),
CommandError::StringTooLong => "The supplied string is too long".into(),
CommandError::InvalidSlot => "The given slot is invalid".into(),
CommandError::InvalidHexString => {
"The supplied string is not in hexadecimal format".into()
}
CommandError::TargetBufferTooSmall => "The target buffer is too small".into(),
CommandError::RngError => "An error occurred during random number generation".into(),
}
}
}
impl error::Error for CommandError {}
impl fmt::Display for CommandError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.as_str())
}
}
impl From<raw::c_int> for CommandError {
fn from(value: raw::c_int) -> Self {
match value {
1 => CommandError::WrongCrc,
2 => CommandError::WrongSlot,
3 => CommandError::SlotNotProgrammed,
4 => CommandError::WrongPassword,
5 => CommandError::NotAuthorized,
6 => CommandError::Timestamp,
7 => CommandError::NoName,
8 => CommandError::NotSupported,
9 => CommandError::UnknownCommand,
10 => CommandError::AesDecryptionFailed,
200 => CommandError::StringTooLong,
201 => CommandError::InvalidSlot,
202 => CommandError::InvalidHexString,
203 => CommandError::TargetBufferTooSmall,
x => CommandError::Unknown(x.into()),
}
}
}
impl From<rand_core::Error> for CommandError {
fn from(_error: rand_core::Error) -> Self {
CommandError::RngError
}
}
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