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- 修正了trace级别日志输出时显示debug级别的问题

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- 🔨 优雅处理所有的错误
- 🔨 将代码分离为单个文件
This commit is contained in:
lkhsss
2025-08-12 17:49:34 +08:00
parent f1ee83bf79
commit 3ad5be3a01
14 changed files with 331 additions and 319 deletions
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331
src/ncmdump.rs
View File

@ -1,3 +1,4 @@
use crate::apperror::AppError;
use crate::messager;
use aes::cipher::generic_array::typenum::U16;
use aes::cipher::{generic_array::GenericArray, BlockDecrypt, KeyInit};
@ -5,8 +6,6 @@ use aes::Aes128;
use audiotags::{MimeType, Picture, Tag};
use base64::{self, Engine};
use colored::*;
use hex::decode;
use lazy_static::lazy_static;
#[allow(unused_imports)]
use log::{debug, error, info, trace, warn};
use messager::Signals;
@ -20,14 +19,16 @@ use std::str::from_utf8;
use std::sync::mpsc;
use std::vec;
use std::time::{SystemTime, UNIX_EPOCH};
lazy_static! {
// 解密需要的密钥
static ref KEY_CORE: Vec<u8> = decode("687A4852416D736F356B496E62617857").unwrap();
static ref KEY_META: Vec<u8> = decode("2331346C6A6B5F215C5D2630553C2728").unwrap();
}
// lazy_static! {
// // 解密需要的密钥
// static ref KEY_CORE: Vec<u8> = decode("687A4852416D736F356B496E62617857").unwrap();//绝对正确
// static ref KEY_META: Vec<u8> = decode("2331346C6A6B5F215C5D2630553C2728").unwrap();
// }
// 原KEY_CORE数据：687A4852416D736F356B496E62617857
const NEW_KEY_CORE:[u8;16] = [0x68, 0x7A, 0x48, 0x52, 0x41, 0x6D, 0x73, 0x6F, 0x35, 0x6B, 0x49, 0x6E, 0x62, 0x61, 0x78, 0x57];
// 原KEY_META数据：2331346C6A6B5F215C5D2630553C2728
const NEW_KEY_META:[u8;16]=[0x23, 0x31, 0x34, 0x6C, 0x6A, 0x6B, 0x5F, 0x21, 0x5C, 0x5D, 0x26, 0x30, 0x55, 0x3C, 0x27, 0x28];
#[derive(Debug)]
#[allow(unused_variables)]
pub struct Ncmfile {
@ -42,18 +43,28 @@ pub struct Ncmfile {
/// 游标
pub position: u64,
}
impl Ncmfile {
pub fn new(filepath: &str) -> Result<Ncmfile, NcmError> {
/// 各种工具方法
pub fn new(filepath: &str) -> Result<Ncmfile, AppError> {
let file = match File::open(filepath) {
Ok(f) => f,
Err(_) => return Err(NcmError::FileReadError),
Err(_) => return Err(AppError::FileReadError),
};
let path = Path::new(filepath);
let fullfilename = path.file_name().unwrap().to_str().unwrap().to_string();
let size = file.metadata().unwrap().len();
let fullfilename = path
.file_name()
.ok_or(AppError::FileReadError)?
.to_str()
.ok_or(AppError::FileReadError)?
.to_string();
let size = file
.metadata()
.map_err(|_| AppError::CannotReadMetaInfo)?
.len();
let filename = match Path::new(&filepath).file_stem() {
Some(f) => f.to_str().unwrap().to_string(),
None => return Err(NcmError::CannotReadFileName),
Some(f) => f.to_str().ok_or(AppError::FileReadError)?.to_string(),
None => return Err(AppError::CannotReadFileName),
};
Ok(Ncmfile {
file,
@ -67,9 +78,9 @@ impl Ncmfile {
///
/// 该函数可以记录上次读取的位置，下次读取时从上次读取的位置开始
/// - length 想要读取的长度
pub fn seekread(&mut self, length: u64) -> Result<Vec<u8>, NcmError> {
pub fn seekread(&mut self, length: u64) -> Result<Vec<u8>, AppError> {
if self.position + length > self.size {
return Err(NcmError::FileReadError);
return Err(AppError::FileReadError);
} else {
let mut reader = BufReader::new(&self.file);
let _ = reader.seek(SeekFrom::Start(self.position));
@ -79,6 +90,7 @@ impl Ncmfile {
Ok(buf[..].to_vec())
}
}
/// 从指定位置开始读取。
///
/// ！！！该函数仍然会更新游标
@ -86,9 +98,9 @@ impl Ncmfile {
/// - offset 开始位置
/// - length 想要读取的长度
#[allow(dead_code)]
pub fn seekread_from(&mut self, offset: u64, length: u64) -> Result<Vec<u8>, NcmError> {
pub fn seekread_from(&mut self, offset: u64, length: u64) -> Result<Vec<u8>, AppError> {
if self.position + length > self.size {
return Err(NcmError::FileReadError);
return Err(AppError::FileReadError);
} else {
let mut reader = BufReader::new(&self.file);
let _ = reader.seek(SeekFrom::Start(offset));
@ -130,9 +142,9 @@ impl Ncmfile {
}
}
/// 跳过某些数据
pub fn skip(&mut self, length: u64) -> Result<(), NcmError> {
pub fn skip(&mut self, length: u64) -> Result<(), AppError> {
if self.position + length > self.size {
return Err(NcmError::FileReadError);
return Err(AppError::FileReadError);
} else {
self.position += length;
Ok(())
@ -146,6 +158,35 @@ impl Ncmfile {
key
}
fn save(&mut self, path: &PathBuf, data: Vec<u8>) -> Result<(), AppError> {
let music_file = match File::create(path) {
Ok(o) => o,
Err(_) => return Err(AppError::FileWriteError),
};
let mut writer = BufWriter::new(music_file);
let _ = writer.write_all(&data);
// 关闭文件
match writer.flush() {
Ok(o) => o,
Err(_) => return Err(AppError::FileWriteError),
};
Ok(())
}
fn is_ncm(data: Vec<u8>) -> Result<(), AppError> {
let header = from_utf8(&data).map_err(|_| AppError::NotNcmFile)?;
if header != "CTENFDAM" {
return Err(AppError::NotNcmFile);
} else {
Ok(())
}
}
/// 使用PKCS5Padding标准，去掉填充信息
fn unpad(data: &[u8]) -> Vec<u8> {
data[..data.len() - data[data.len() - 1] as usize].to_vec()
}
}
impl Ncmfile {
/// 解密函数
#[allow(unused_assignments)]
pub fn dump(
@ -153,30 +194,18 @@ impl Ncmfile {
outputdir: &Path,
tx: mpsc::Sender<messager::Message>,
force_save: bool,
) -> Result<(), NcmError> {
) -> Result<(), AppError> {
let messager = messager::Messager::new(self.fullfilename.clone(), tx);
let _ = messager.send(Signals::Start);
//TODO 通讯合法化
// info!("开始解密[{}]文件", self.fullfilename.yellow());
// 获取magic header 。应为CTENFDAM
let magic_header = match self.seekread(8) {
Ok(header) => header,
Err(_e) => {
return Err(NcmError::FileReadError); //TODO去除向上传播
}
};
// 获取magic header 应为CTENFDAM
trace!("读取magic header");
let magic_header = self.seekread(8)?;
// 判断是否为ncm格式的文件
match from_utf8(&magic_header) {
Ok(header) => {
if header != "CTENFDAM" {
// 传播错误至dump
return Err(NcmError::NotNcmFile);
}
}
// 传播错误至dump
Err(_e) => return Err(NcmError::NotNcmFile),
}
trace!("判断是否为ncm格式的文件");
Self::is_ncm(magic_header)?;
// 跳过2字节
trace!("跳过2字节");
@ -184,20 +213,28 @@ impl Ncmfile {
trace!("获取RC4密钥长度");
//小端模式读取RC4密钥长度 正常情况下应为128
let key_length = u32::from_le_bytes(self.seekread(4).unwrap().try_into().unwrap()) as u64;
let key_length = u32::from_le_bytes(
self.seekread(4)?
.try_into()
.map_err(|_| AppError::FileReadError)?,
) as u64;//数据长度不够只能使用u32 然后转化为u64
// debug!("RC4密钥长度为：{}", key_length);
//读取密钥 开头应为 neteasecloudmusic
trace!("读取RC4密钥");
let mut key_data = self.seekread(key_length).unwrap();
let mut key_data = self.seekread(key_length)?;
//aes128解密
let key_data = &aes128_to_slice(&KEY_CORE, Self::parse_key(&mut key_data[..])); //先把密钥按照字节进行0x64异或
// RC4密钥
let key_data = unpad(&key_data[..])[17..].to_vec(); //去掉neteasecloudmusic
let key_data = &aes128_to_slice(&NEW_KEY_CORE, Self::parse_key(&mut key_data[..]).to_vec())?; //先把密钥按照字节进行0x64异或
// RC4密钥
let key_data = Self::unpad(&key_data[..])[17..].to_vec(); //去掉neteasecloudmusic
//读取meta信息的数据大小
trace!("获取meta信息数据大小");
let meta_length = u32::from_le_bytes(self.seekread(4)?.try_into().unwrap()) as u64;
let meta_length = u32::from_le_bytes(
self.seekread(4)?
.try_into()
.map_err(|_| AppError::FileDataError)?,
) as u64;
let _ = messager.send(Signals::GetMetaInfo);
// 读取meta信息
@ -213,20 +250,20 @@ impl Ncmfile {
let _ = match &base64::engine::general_purpose::STANDARD
.decode_vec(&mut meta_data[22..], &mut decode_data)
{
Err(_) => return Err(NcmError::CannotReadMetaInfo),
Err(_) => return Err(AppError::CannotReadMetaInfo),
_ => (),
};
// aes128解密
let aes_data = aes128_to_slice(&KEY_META, &decode_data);
let aes_data = aes128_to_slice(&NEW_KEY_META, decode_data)?;
// unpadding
let json_data = match String::from_utf8(unpad(&aes_data)[6..].to_vec()) {
let json_data = match String::from_utf8(Self::unpad(&aes_data)[6..].to_vec()) {
Ok(o) => o,
Err(_) => return Err(NcmError::CannotReadMetaInfo),
Err(_) => return Err(AppError::CannotReadMetaInfo),
};
debug!("json_data: {}", json_data);
let data: Value = match serde_json::from_str(&json_data[..]) {
Ok(o) => o,
Err(_) => return Err(NcmError::CannotReadMetaInfo),
Err(_) => return Err(AppError::CannotReadMetaInfo),
}; //解析json数据
data
};
@ -237,14 +274,18 @@ impl Ncmfile {
let filename = format!(
"{}.{}",
self.filename,
meta_data.get("format").unwrap().as_str().unwrap()
meta_data
.get("format")
.ok_or(AppError::CannotReadMetaInfo)?
.as_str()
.ok_or(AppError::CannotReadMetaInfo)?
);
// let filename = standardize_filename(filename);
debug!("文件名：{}", filename.yellow());
//链级创建输出目录
match fs::create_dir_all(outputdir) {
Err(_) => return Err(NcmError::FileWriteError),
Err(_) => return Err(AppError::FileWriteError),
_ => (),
};
outputdir.join(filename)
@ -254,12 +295,13 @@ impl Ncmfile {
// 先检查是否存在
if !force_save && Path::new(&path).exists() {
return Err(NcmError::ProtectFile);
return Err(AppError::ProtectFile);
}
// 跳过4个字节的校验码
trace!("读取校验码");
// let _crc32 = u32::from_le_bytes(self.seekread(4).unwrap().try_into().unwrap()) as u64;
// trace!("读取校验码");
// let _crc32 = u32::from_le_bytes(self.seekread(4)?.try_into().map_err(AppError::FileDataError)?) as u64;
self.skip(4)?;
// 跳过5个字节
@ -269,7 +311,11 @@ impl Ncmfile {
let _ = messager.send(Signals::GetCover);
// 获取图片数据的大小
trace!("获取图片数据的大小");
let image_data_length = u32::from_le_bytes(self.seekread(4)?.try_into().unwrap()) as u64;
let image_data_length = u32::from_le_bytes(
self.seekread(4)?
.try_into()
.map_err(|_| AppError::FileDataError)?,
) as u64;
// 读取图片，并写入文件当中
let image_data = self.seekread(image_data_length)?; //读取图片数据
@ -298,26 +344,6 @@ impl Ncmfile {
key_box
};
/* let mut s_box = {
let key_length = key_data.len();
let key_box = Vec::from(key_data);
let mut s = (0..=255).collect::<Vec<u8>>();
let mut j = 0;
for i in 0..=255 {
j = (j as usize + s[i] as usize + key_box[i % key_length] as usize) & 0xFF;
//记录 s[j]的值
let temp = &s.get(j as usize).unwrap().to_owned();
s[j as usize] = s[i];
s[i] = temp.to_owned();
}
s
}; */
// let key_box = key_box[0..(key_box.len()-key_box[key_box.len() as usize-1] as usize)].to_vec();
//解密音乐数据
trace!("解密音乐数据");
let _ = messager.send(Signals::Decrypt);
@ -342,28 +368,6 @@ impl Ncmfile {
}
}
//组成流密钥
/* let mut stream = Vec::new();
for i in 0..256 {
stream.push(
s_box[(s_box[i] as usize + s_box[(i + s_box[i] as usize) & 0xFF] as usize) & 0xFF],
)
} */
// 解密音乐数据
/* loop {
let chunk = self.seekread_no_error(256); //每次读取256个字节
if chunk.len() != 0 {
for (count, &i) in chunk[..].iter().enumerate() {
music_data.push(i ^ stream[count])
}
} else {
break;
}
} */
// debug!("music_data：{:?}", music_data);
// debug!("长度：{}", stream.len());
//退出循环，写入文件
let _ = messager.send(Signals::Save);
@ -373,20 +377,22 @@ impl Ncmfile {
// 保存封面
let mut tag = match Tag::new().read_from_path(&path) {
Ok(o) => o,
Err(_) => return Err(NcmError::CoverCannotSave),
Err(_) => return Err(AppError::CoverCannotSave),
};
let cover = Picture {
mime_type: MimeType::Jpeg,
data: &image_data,
};
tag.set_album_cover(cover); //添加封面
let _ = tag.write_to_path(&path.to_str().unwrap()); //保存
let _ = tag
.write_to_path(&path.to_str().ok_or(AppError::SaveError)?)
.map_err(|_| AppError::SaveError); //保存
}
info!(
"[{}] 文件已保存到: {}",
self.filename.yellow(),
path.to_str().unwrap().bright_cyan()
path.to_str().ok_or(AppError::SaveError)?.bright_cyan()
);
info!(
"[{}]{}",
@ -396,20 +402,6 @@ impl Ncmfile {
let _ = messager.send(Signals::End);
Ok(())
}
fn save(&mut self, path: &PathBuf, data: Vec<u8>) -> Result<(), NcmError> {
let music_file = match File::create(path) {
Ok(o) => o,
Err(_) => return Err(NcmError::FileWriteError),
};
let mut writer = BufWriter::new(music_file);
let _ = writer.write_all(&data);
// 关闭文件
match writer.flush() {
Ok(o) => o,
Err(_) => return Err(NcmError::FileWriteError),
};
Ok(())
}
}
/// 存储元数据的结构体
@ -470,54 +462,26 @@ pub struct Key {
// fn read_meta(file: &mut File, meta_length: u32) -> Result<Vec<u8>, Error> {}
fn convert_to_generic_arrays(input: &[u8]) -> Vec<GenericArray<u8, U16>> {
fn convert_to_generic_arrays(input: &[u8]) -> Result<Vec<GenericArray<u8, U16>>, AppError> {
// 确保输入的长度是16的倍数
assert!(
input.len() % 16 == 0,
"Input length must be a multiple of 16"
);
if input.len() % 16 == 0 {}
input
Ok(input
.chunks(16)
.map(|chunk| {
// 将每个块转换为GenericArray
GenericArray::clone_from_slice(chunk)
})
.collect()
}
/// aes128解密
/// ！！！未对齐数据！！！
/// TODO
/// 解密NCM文件的rc4密钥前记得按字节对0x64进行异或
#[allow(dead_code)]
fn aes128(key: &[u8], blocks: &[u8]) -> String {
trace!("进行AES128解密");
let key = GenericArray::from_slice(key);
let mut blocks = convert_to_generic_arrays(blocks);
// 初始化密钥
let cipher = Aes128::new(&key);
// 开始解密
cipher.decrypt_blocks(&mut blocks);
let mut x = String::new();
for block in blocks.iter() {
x.push_str(std::str::from_utf8(&block).unwrap())
}
// 去除所有空格及控制字符
let x = x[..].trim();
x.to_string()
.collect())
}
/// ## AES128解密
fn aes128_to_slice(key: &[u8], blocks: &[u8]) -> Vec<u8> {
/// 解密NCM文件的rc4密钥前记得按字节对0x64进行异或
fn aes128_to_slice<T: AsRef<[u8]>>(key: &T, blocks: Vec<u8>) -> Result<Vec<u8>, AppError> {
trace!("进行AES128解密");
let key = GenericArray::from_slice(key);
let key = GenericArray::from_slice(key.as_ref());
let mut blocks = convert_to_generic_arrays(blocks);
let mut blocks = convert_to_generic_arrays(&blocks)?;
// 初始化密钥
let cipher = Aes128::new(&key);
@ -532,7 +496,7 @@ fn aes128_to_slice(key: &[u8], blocks: &[u8]) -> Vec<u8> {
x.push(i.to_owned());
}
}
x
Ok(x.into())
}
/// ## 规范文件名称
@ -553,66 +517,3 @@ fn standardize_filename(old_fullfilename: String) -> String {
}
new_fullfilename
}
/// 使用PKCS5Padding标准，去掉填充信息
fn unpad(data: &[u8]) -> Vec<u8> {
data[..data.len() - data[data.len() - 1] as usize].to_vec()
}
#[derive(Debug,PartialEq)]
#[allow(dead_code)]
pub enum NcmError {
NotNcmFile,
CannotReadFileName,
CannotReadMetaInfo,
CoverCannotSave,
FileReadError,
FileSkipError,
FileWriteError,
FullFilenameError,
FileNotFound,
ProtectFile,
}
impl std::error::Error for NcmError {}
impl std::fmt::Display for NcmError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
Self::NotNcmFile => write!(f, "该文件不为NCM格式"),
Self::CannotReadFileName => write!(f, "无法读取文件名称"),
Self::CannotReadMetaInfo => write!(f, "无法读取歌曲元信息"),
Self::CoverCannotSave => write!(f, "封面无法保存"),
Self::FileReadError => write!(f, "读取文件时发生错误"),
Self::FileWriteError => write!(f, "写入文件时错误"),
Self::FullFilenameError => write!(f, "文件名不符合规范"),
Self::ProtectFile => write!(
f,
"已关闭文件强制覆盖且文件已存在。使用-f或-forcesave开启强制覆盖。"
),
_ => write!(f, "未知错误"),
}
}
}
#[allow(dead_code)]
pub struct TimeCompare(u128);
impl TimeCompare {
pub fn new() -> Self {
Self(
SystemTime::now()
.duration_since(UNIX_EPOCH)
.unwrap()
.as_millis(),
)
}
pub fn compare(&self) -> u128 {
let time = SystemTime::now()
.duration_since(UNIX_EPOCH)
.unwrap()
.as_millis();
time - self.0
}
}