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use core::fmt::{Display, Formatter, Result as FmtResult};
pub type Result<T, E = Error> = core::result::Result<T, E>;
#[derive(Debug, PartialEq, Eq)]
pub enum Error {
BufferSize {
name: &'static str,
needs: usize,
has: usize,
},
CipherError {
alg: &'static str,
},
ConvertError {
from: &'static str,
to: &'static str,
},
PrivateKeyError,
InvalidArgumentError {
alg: &'static str,
expected: &'static str,
},
SystemError {
call: &'static str,
raw_os_error: Option<i32>,
},
InvalidLength,
}
#[cfg(feature = "digest")]
impl From<digest::InvalidLength> for Error {
fn from(_: digest::InvalidLength) -> Self {
Error::InvalidLength
}
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
match self {
Error::BufferSize { name, needs, has } => {
write!(f, "{} buffer needs {} bytes, but it only has {}", name, needs, has)
}
Error::CipherError { alg } => write!(f, "error in algorithm {}", alg),
Error::ConvertError { from, to } => write!(f, "failed to convert {} to {}", from, to),
Error::PrivateKeyError => write!(f, "Failed to generate private key."),
Error::InvalidArgumentError { alg, expected } => write!(f, "{} expects {}", alg, expected),
Error::SystemError {
call,
raw_os_error: None,
} => write!(f, "system error when calling {}", call),
Error::SystemError {
call,
raw_os_error: Some(errno),
} => write!(f, "system error when calling {}: {}", call, errno),
Error::InvalidLength => write!(f, "invalid length"),
}
}
}
#[cfg(feature = "std")]
impl std::error::Error for Error {}