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use thiserror::Error;

/// An error happened while reading a PEM file.
#[derive(Error, Debug)]
pub enum PemError {
    /// An error occurred with disk I/O.
    #[error(transparent)]
    Io(#[from] std::io::Error),

    /// An unsupported curve was detected
    #[error("Only {0} curve is supported: {1:?}")]
    UnsupportedKeyCurve(String, Vec<u8>),

    /// An error occurred while reading the file in PEM format.
    #[cfg(feature = "pem")]
    #[error("An error occurred while reading the file: {0}")]
    PemError(#[from] pem::PemError),

    /// The key was rejected by Ring.
    #[error("A key was rejected by Ring: {0}")]
    KeyRejected(#[from] ring::error::KeyRejected),

    /// The key was rejected by k256.
    #[error("A key was rejected by k256: {0}")]
    ErrorStack(#[from] k256::pkcs8::Error),
}