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use std::{error::Error as StdError, fmt, result};
#[derive(Debug)]
pub enum Error {
Scrypt(ScryptError),
Symm(SymmError),
}
#[derive(Debug)]
pub enum ScryptError {
InvalidN,
InvalidP,
ScryptParam(scrypt::errors::InvalidParams),
ScryptLength(scrypt::errors::InvalidOutputLen),
}
#[derive(Debug)]
pub struct SymmError(PrivSymmErr);
#[derive(Debug)]
enum PrivSymmErr {
BlockMode(block_modes::BlockModeError),
KeyStream(aes_ctr::cipher::stream::LoopError),
InvalidKeyLength(block_modes::InvalidKeyIvLength),
}
impl StdError for Error {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
match self {
Error::Scrypt(scrypt_err) => Some(scrypt_err),
Error::Symm(symm_err) => Some(symm_err),
}
}
}
impl StdError for ScryptError {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
match self {
ScryptError::ScryptParam(err) => Some(err),
ScryptError::ScryptLength(err) => Some(err),
_ => None,
}
}
}
impl StdError for SymmError {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
match &self.0 {
PrivSymmErr::BlockMode(err) => Some(err),
PrivSymmErr::InvalidKeyLength(err) => Some(err),
_ => None,
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> result::Result<(), fmt::Error> {
match self {
Error::Scrypt(err) => write!(f, "scrypt error: {}", err),
Error::Symm(err) => write!(f, "symm error: {}", err),
}
}
}
impl fmt::Display for ScryptError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> result::Result<(), fmt::Error> {
match self {
ScryptError::InvalidN => write!(f, "invalid n argument"),
ScryptError::InvalidP => write!(f, "invalid p argument"),
ScryptError::ScryptParam(err) => write!(f, "invalid params: {}", err),
ScryptError::ScryptLength(err) => write!(f, "invalid output length: {}", err),
}
}
}
impl fmt::Display for SymmError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> result::Result<(), fmt::Error> {
match self {
SymmError(PrivSymmErr::BlockMode(err)) => write!(f, "block cipher error: {}", err),
SymmError(PrivSymmErr::KeyStream(err)) => write!(f, "ctr key stream ended: {}", err),
SymmError(PrivSymmErr::InvalidKeyLength(err)) => write!(f, "block cipher key length: {}", err),
}
}
}
impl Into<std::io::Error> for Error {
fn into(self) -> std::io::Error {
std::io::Error::new(std::io::ErrorKind::Other, format!("Crypto error: {}", self))
}
}
impl From<block_modes::BlockModeError> for SymmError {
fn from(e: block_modes::BlockModeError) -> SymmError {
SymmError(PrivSymmErr::BlockMode(e))
}
}
impl From<block_modes::InvalidKeyIvLength> for SymmError {
fn from(e: block_modes::InvalidKeyIvLength) -> SymmError {
SymmError(PrivSymmErr::InvalidKeyLength(e))
}
}
impl From<aes_ctr::cipher::stream::LoopError> for SymmError {
fn from(e: aes_ctr::cipher::stream::LoopError) -> SymmError {
SymmError(PrivSymmErr::KeyStream(e))
}
}
impl From<scrypt::errors::InvalidParams> for ScryptError {
fn from(e: scrypt::errors::InvalidParams) -> ScryptError {
ScryptError::ScryptParam(e)
}
}
impl From<scrypt::errors::InvalidOutputLen> for ScryptError {
fn from(e: scrypt::errors::InvalidOutputLen) -> ScryptError {
ScryptError::ScryptLength(e)
}
}
impl From<ScryptError> for Error {
fn from(e: ScryptError) -> Error {
Error::Scrypt(e)
}
}
impl From<SymmError> for Error {
fn from(e: SymmError) -> Error {
Error::Symm(e)
}
}