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// Copyright 2023, The Android Open Source Project
//
// 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.
//! Errors and relating functions thrown in this library.
use open_dice_cbor_bindgen::DiceResult;
use std::{fmt, result};
#[cfg(feature = "std")]
use std::error::Error;
/// Error type used by DICE.
#[derive(Debug)]
pub enum DiceError {
/// Provided input was invalid.
InvalidInput,
/// Provided buffer was too small.
BufferTooSmall,
/// Platform error.
PlatformError,
}
/// This makes `DiceError` accepted by anyhow.
#[cfg(feature = "std")]
impl Error for DiceError {}
impl fmt::Display for DiceError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Self::InvalidInput => write!(f, "invalid input"),
Self::BufferTooSmall => write!(f, "buffer too small"),
Self::PlatformError => write!(f, "platform error"),
}
}
}
/// DICE result type.
pub type Result<T> = result::Result<T, DiceError>;
/// Checks the given `DiceResult`. Returns an error if it's not OK.
pub fn check_result(result: DiceResult) -> Result<()> {
match result {
DiceResult::kDiceResultOk => Ok(()),
DiceResult::kDiceResultInvalidInput => Err(DiceError::InvalidInput),
DiceResult::kDiceResultBufferTooSmall => Err(DiceError::BufferTooSmall),
DiceResult::kDiceResultPlatformError => Err(DiceError::PlatformError),
}
}
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