[kwm] refactor: improve error display
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@ -1,6 +1,7 @@
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use crate::kwm_v1::CipherV1;
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use anyhow::Result;
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use byteorder::{ReadBytesExt, LE};
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use std::fmt;
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use std::io::{Cursor, Read};
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use thiserror::Error;
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use umc_qmc::QMCv2Cipher;
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@ -13,13 +14,16 @@ pub use umc_qmc::QMCv2Cipher as CipherV2;
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/// Commonly used secret key for Kuwo services.
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pub const SECRET_KEY: [u8; 8] = *b"ylzsxkwm";
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#[derive(Debug)]
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pub struct HeaderMagicBytes(pub [u8; 16]);
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#[derive(Error, Debug)]
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pub enum KuwoCryptoError {
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#[error("Invalid DES data size (expected: {0} mod 8 == 0)")]
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InvalidDesDataSize(usize),
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#[error("Invalid KWM header magic bytes: {0:?}")]
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InvalidHeaderMagic([u8; 16]),
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#[error("Invalid KWM header magic bytes: {0}")]
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InvalidHeaderMagic(HeaderMagicBytes),
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#[error("KWMv2: EKey required")]
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V2EKeyRequired,
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@ -28,6 +32,15 @@ pub enum KuwoCryptoError {
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UnsupportedVersion(usize),
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}
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impl fmt::Display for HeaderMagicBytes {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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for byte in self.0.iter() {
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write!(f, "{:02x} ", byte)?;
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}
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Ok(())
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}
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}
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pub const DATA_START_OFFSET: usize = 0x400;
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pub enum Cipher {
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