frank_jwt 3.1.4

/**
* Copyright (c) 2015-2025 Alex Maslakov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* For questions and comments about this product, please see the project page at:
*
* https://github.com/GildedHonour/frank_jwt
*
*/
use base64::DecodeError as B64Error;
use openssl::error::ErrorStack;
use serde_json::Error as SJError;
use std::error;
use std::fmt;
use std::io::Error as IoError;

macro_rules! impl_error {
    ($from:ty, $to:path) => {
        impl From<$from> for Error {
            fn from(e: $from) -> Self {
                $to(format!("{:?}", e))
            }
        }
    };
}

#[derive(Clone, Debug, PartialEq, Eq)]
pub enum Error {
    SignatureExpired,
    SignatureInvalid,
    JWTInvalid,
    IssuerInvalid,
    ExpirationInvalid,
    AudienceInvalid,
    FormatInvalid(String),
    IoError(String),
    OpenSslError(String),
    ProtocolError(String),
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Error::SignatureExpired => write!(f, "Signature expired."),
            Error::SignatureInvalid => write!(f, "Signature invalid."),
            Error::JWTInvalid => write!(f, "JWT invalid."),
            Error::IssuerInvalid => write!(f, "Issuer invalid."),
            Error::ExpirationInvalid => write!(f, "Expiration invalid."),
            Error::AudienceInvalid => write!(f, "Audience invalid."),
            Error::FormatInvalid(msg) => write!(f, "Format invalid: {}.", msg),
            Error::IoError(msg) => write!(f, "IO error: {}.", msg),
            Error::OpenSslError(msg) => write!(f, "Open SSL error: {}.", msg),
            Error::ProtocolError(msg) => write!(f, "Protocol error: {}.", msg),
        }
    }
}

impl error::Error for Error {}

impl_error! {IoError, Error::IoError}
impl_error! {SJError, Error::FormatInvalid}
impl_error! {ErrorStack, Error::OpenSslError}
impl_error! {B64Error, Error::ProtocolError}