commit 50b84ae88c6bc7ebe7b2363f81c9251abbddd5c4
Author: Mason <1281814306@qq.com>
Date:   Tue Nov 30 12:47:53 2021 +0800

    Initial commit

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8eb7471
--- /dev/null
+++ b/README.md
@@ -0,0 +1,63 @@
+# typora Cracker
+
+A patch and keygen tools for typora.
+
+中文说明请戳[这里](README_CN.md)
+
+## WARNING
+```
+FOR STUDY AND DISCUSSION ONLY, PLEASE DO NOT ENGAGE IN ANY ILLEGAL ACTS.
+ANY PROBLEMS ARISING FROM THIS WILL BE BORNE BY THE USER (YOU).
+```
+
+## Features
+
+- Supports ALL OS supported by typora
+
+## Usage
+
+1. `pip install -r requirements.txt`
+2. `python typroa.py --help`
+3. read and use.
+4. patch License.js.
+5. replace app.asar.
+6. run keygen.
+7. enjoy it.
+
+
+## Example
+
+```shell
+> python typroa.py --help
+usage: typora.py [-h] [-u] [-f] asarPath dirPath
+
+extract and decryption app.asar file from [Typora].
+
+positional arguments:
+  asarPath    app.asar file path [input/ouput]
+  dirPath     as tmp and out directory.
+
+optional arguments:
+  -h, --help  show this help message and exit
+  -u          pack & encryption (default: extract & decryption)
+  -f          enabled prettify/compress (default: disabled
+
+If you have any questions, please contact [ MasonShi@88.com ]
+
+> python typora.py {installRoot}/Typora/resources/app.asar workstation/outfile/
+⋯
+> python typora.py -u workstation/outfile/ workstation/outappasar
+⋯
+> cp {installRoot}/Typora/resources/app.asar {installRoot}/Typora/resources/app.asar.bak
+> mv workstation/outappasar/app.asar {installRoot}/Typora/resources/app.asar
+# (patch code)
+> node keygen.js
+XXXXXX-XXXXXX-XXXXXX-XXXXXX
+> typora
+# (input info)
+email: crack@example.com
+serial: XXXXXX-XXXXXX-XXXXXX-XXXXXX
+```
+
+## LICENSE
+ MIT LICENSE
\ No newline at end of file
diff --git a/README_CN.md b/README_CN.md
new file mode 100644
index 0000000..3bd23fa
--- /dev/null
+++ b/README_CN.md
@@ -0,0 +1,61 @@
+# typora Cracker
+
+一个typora的Patch和KeyGen工具
+
+## 敬告
+```
+仅供学习和讨论，请不要从事任何非法行为。
+由此产生的任何问题都将由用户（您）承担。
+```
+
+## Features
+
+- 理论上支持Typora支持的所有操作系统
+
+## 食用方式
+
+1. `pip install -r requirements.txt`
+2. `python typroa.py --help`
+3. 阅读帮助文档及使用。
+4. 修改导出的 License.js。
+5. 替换原目录下的 app.asar。
+6. 运行KeyGen程序。
+7. 正常激活。
+
+
+## 示例
+
+```shell
+> python typroa.py --help
+usage: typora.py [-h] [-u] [-f] asarPath dirPath
+
+extract and decryption app.asar file from [Typora].
+
+positional arguments:
+  asarPath    app.asar file path [input/ouput]
+  dirPath     as tmp and out directory.
+
+optional arguments:
+  -h, --help  show this help message and exit
+  -u          pack & encryption (default: extract & decryption)
+  -f          enabled prettify/compress (default: disabled
+
+If you have any questions, please contact [ MasonShi@88.com ]
+
+> python typora.py {installRoot}/Typora/resources/app.asar workstation/outfile/
+⋯
+> python typora.py -u workstation/outfile/ workstation/outappasar
+⋯
+> cp {installRoot}/Typora/resources/app.asar {installRoot}/Typora/resources/app.asar.bak
+> mv workstation/outappasar/app.asar {installRoot}/Typora/resources/app.asar
+# (patch code)
+> node keygen.js
+XXXXXX-XXXXXX-XXXXXX-XXXXXX
+> typora
+# (input info)
+email: crack@example.com
+serial: XXXXXX-XXXXXX-XXXXXX-XXXXXX
+```
+
+## LICENSE
+ MIT LICENSE
\ No newline at end of file
diff --git a/keygen.js b/keygen.js
new file mode 100644
index 0000000..5bc9850
--- /dev/null
+++ b/keygen.js
@@ -0,0 +1,17 @@
+function randomSerial() {
+    var $chars = 'L23456789ABCDEFGHJKMNPQRSTUVWXYZ';
+    var maxPos = $chars.length;
+    var serial = '';
+    for (i = 0; i < 22; i++) {
+        serial += $chars.charAt(Math.floor(Math.random() * maxPos));
+    }
+    serial += (e => {
+        for (var t = "", i = 0; i < 2; i++) {
+            for (var a = 0, s = 0; s < 16; s += 2) a += $chars.indexOf(e[i + s]);
+            t += $chars[a %= $chars.length]
+        }
+        return t
+    })(serial)
+    return serial.slice(0, 6) + "-" + serial.slice(6, 12) + "-" + serial.slice(12, 18) + "-" + serial.slice(18, 24);
+}
+console.log(randomSerial());
diff --git a/masar.py b/masar.py
new file mode 100644
index 0000000..65f81d5
--- /dev/null
+++ b/masar.py
@@ -0,0 +1,176 @@
+# -*- coding:utf-8 -*-
+"""
+@Author: Mas0n
+@File: masar.py
+@Time: 2021-11-29 22:34
+@Desc: It's all about getting better.
+"""
+import os
+import errno
+import io
+import struct
+import shutil
+import fileinput
+import json
+
+
+def round_up(i, m):
+    return (i + m - 1) & ~(m - 1)
+
+
+class Asar:
+    def __init__(self, path, fp, header, base_offset):
+        self.path = path
+        self.fp = fp
+        self.header = header
+        self.base_offset = base_offset
+
+    @classmethod
+    def open(cls, path):
+        fp = open(path, 'rb')
+        data_size, header_size, header_object_size, header_string_size = struct.unpack('<4I', fp.read(16))
+        header_json = fp.read(header_string_size).decode('utf-8')
+        return cls(
+            path=path,
+            fp=fp,
+            header=json.loads(header_json),
+            base_offset=round_up(16 + header_string_size, 4)
+        )
+
+    @classmethod
+    def compress(cls, path):
+        offset = 0
+        paths = []
+
+        def _path_to_dict(path):
+            nonlocal offset, paths
+            result = {'files': {}}
+            for f in os.scandir(path):
+                if os.path.isdir(f.path):
+                    result['files'][f.name] = _path_to_dict(f.path)
+                elif f.is_symlink():
+                    result['files'][f.name] = {
+                        'link': os.path.realpath(f.name)
+                    }
+                # modify
+                elif f.name == "main.node":
+                    size = f.stat().st_size
+                    result['files'][f.name] = {
+                        'size': size,
+                        "unpacked": True
+                    }
+                else:
+                    paths.append(f.path)
+                    size = f.stat().st_size
+                    result['files'][f.name] = {
+                        'size': size,
+                        'offset': str(offset)
+                    }
+                    offset += size
+            return result
+
+        def _paths_to_bytes(paths):
+            _bytes = io.BytesIO()
+            with fileinput.FileInput(files=paths, mode="rb") as f:
+                for i in f:
+                    _bytes.write(i)
+            return _bytes.getvalue()
+
+        header = _path_to_dict(path)
+        header_json = json.dumps(header, sort_keys=True, separators=(',', ':')).encode('utf-8')
+        header_string_size = len(header_json)
+        data_size = 4
+        aligned_size = round_up(header_string_size, data_size)
+        header_size = aligned_size + 8
+        header_object_size = aligned_size + data_size
+        diff = aligned_size - header_string_size
+        header_json = header_json + b'\0' * diff if diff else header_json
+        fp = io.BytesIO()
+        fp.write(struct.pack('<4I', data_size, header_size, header_object_size, header_string_size))
+        fp.write(header_json)
+        fp.write(_paths_to_bytes(paths))
+
+        return cls(
+            path=path,
+            fp=fp,
+            header=header,
+            base_offset=round_up(16 + header_string_size, 4))
+
+    def _copy_unpacked_file(self, source, destination):
+        unpacked_dir = self.path + '.unpacked'
+        if not os.path.isdir(unpacked_dir):
+            print("Couldn't copy file {}, no extracted directory".format(source))
+            return
+
+        src = os.path.join(unpacked_dir, source)
+        if not os.path.exists(src):
+            print("Couldn't copy file {}, doesn't exist".format(src))
+            return
+
+        dest = os.path.join(destination, source)
+        shutil.copyfile(src, dest)
+
+    def _extract_file(self, source, info, destination):
+        if 'offset' not in info:
+            self._copy_unpacked_file(source, destination)
+            return
+
+        self.fp.seek(self.base_offset + int(info['offset']))
+        r = self.fp.read(int(info['size']))
+
+        dest = os.path.join(destination, source)
+        with open(dest, 'wb') as f:
+            f.write(r)
+
+    def _extract_link(self, source, link, destination):
+        dest_filename = os.path.normpath(os.path.join(destination, source))
+        link_src_path = os.path.dirname(os.path.join(destination, link))
+        link_to = os.path.join(link_src_path, os.path.basename(link))
+
+        try:
+            os.symlink(link_to, dest_filename)
+        except OSError as e:
+            if e.errno == errno.EXIST:
+                os.unlink(dest_filename)
+                os.symlink(link_to, dest_filename)
+            else:
+                raise e
+
+    def _extract_directory(self, source, files, destination):
+        dest = os.path.normpath(os.path.join(destination, source))
+
+        if not os.path.exists(dest):
+            os.makedirs(dest)
+
+        for name, info in files.items():
+            item_path = os.path.join(source, name)
+
+            if 'files' in info:
+                self._extract_directory(item_path, info['files'], destination)
+            elif 'link' in info:
+                self._extract_link(item_path, info['link'], destination)
+            else:
+                self._extract_file(item_path, info, destination)
+
+    def extract(self, path):
+        if not os.path.isdir(path):
+            raise NotADirectoryError()
+        self._extract_directory('.', self.header['files'], path)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.fp.close()
+
+
+def pack_asar(source, dest):
+    with Asar.compress(source) as a:
+        with open(dest, 'wb') as fp:
+            a.fp.seek(0)
+            fp.write(a.fp.read())
+
+
+def extract_asar(source, dest):
+    with Asar.open(source) as a:
+        a.extract(dest)
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..68ad2b6
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,4 @@
+jsbeautifier==1.14.0
+jsmin==3.0.0
+loguru==0.5.3
+pycryptodome==3.11.0
diff --git a/typora.py b/typora.py
new file mode 100644
index 0000000..22ed78d
--- /dev/null
+++ b/typora.py
@@ -0,0 +1,151 @@
+# -*- coding:utf-8 -*-
+"""
+@Author: Mas0n
+@File: typora.py
+@Time: 2021-11-29 21:24
+@Desc: It's all about getting better.
+"""
+from Crypto.Cipher import AES
+from Crypto.Util.Padding import pad
+from Crypto.Util.Padding import unpad
+from base64 import b64decode, b64encode
+from jsbeautifier import beautify
+from jsmin import jsmin
+from os import listdir, urandom, makedirs
+from os.path import isfile, isdir, join as pjoin, split as psplit
+from loguru import logger as log
+from masar import extract_asar, pack_asar
+import argparse
+
+key = [0x4B029A9482B3E14E, 0xF157FEB4B4522F80, 0xE25692105308F4BE, 0x6DD58DDDA3EC0DC2]
+aesKey = b""
+for akey in key:
+    aesKey += int.to_bytes(akey, byteorder="little", length=8)
+
+
+def _mkdir(_path):
+    try:
+        makedirs(_path)
+    except FileExistsError:
+        log.warning(f"May FolderExists: {_path}")
+
+
+def decScript(b64: bytes, prettify: bool):
+    lCode = b64decode(b64)
+    # iv: the first 16 bytes of the file
+    aesIv = lCode[0:16]
+    # cipher text
+    cipherText = lCode[16:]
+    # AES 256 CBC
+    ins = AES.new(key=aesKey, iv=aesIv, mode=AES.MODE_CBC)
+    code = unpad(ins.decrypt(cipherText), 16, 'pkcs7')
+    if prettify:
+        code = beautify(code.decode()).encode()
+    return code
+
+
+def extractWdec(asarPath, path, prettify):
+    """
+    :param asarPath: asar out dir
+    :param path: out dir
+    :return: None
+    """
+    # try to create empty dir to save extract files
+    path = pjoin(path, "tmp_app")
+    _mkdir(path)
+    log.info(f"extract asar file: {asarPath}")
+    # extract app.asar to {path}/*
+    extract_asar(asarPath, path)
+    log.success(f"extract ended.")
+
+    log.info(f"read Directory: {path}")
+    # construct the save directory {pathRoot}/dec_app
+    outPath = pjoin(psplit(path)[0], "dec_app")
+    # try to create empty dir to save decryption files
+    _mkdir(outPath)
+    log.info(f"set Directory: {outPath}")
+    # enumerate extract files
+    fileArr = listdir(path)
+    for name in fileArr:
+        # read files content
+        fpath = pjoin(path, name)
+        scode = open(fpath, "rb").read()
+        log.info(f"open file: {name}")
+        # if file suffix is *.js then decryption file
+        if isfile(fpath) and name.endswith(".js"):
+            scode = decScript(scode, prettify)
+        else:
+            log.debug(f"skip file: {name}")
+        # save content {outPath}/{name}
+        open(pjoin(outPath, name), "wb").write(scode)
+        log.success(f"decrypt and save file: {name}")
+
+
+def encScript(_code: bytes, compress):
+    if compress:
+        _code = jsmin(_code.decode(), quote_chars="'\"`").encode()
+    aesIv = urandom(16)
+    cipherText = aesIv + _code
+    ins = AES.new(key=aesKey, iv=aesIv, mode=AES.MODE_CBC)
+    enc = ins.encrypt(pad(cipherText, 16, 'pkcs7'))
+    lCode = b64encode(enc)
+    return lCode
+
+
+def packWenc(path, outPath, compress):
+    """
+    :param path: out dir
+    :param outPath: pack path app.asar
+    :param compress: Bool
+    :return: None
+    """
+    if not isdir(outPath):
+        log.error("plz input Directory for app.asar")
+        raise NotADirectoryError
+    encFilePath = pjoin(psplit(outPath)[0], "enc_app")
+    _mkdir(encFilePath)
+
+    outFilePath = pjoin(outPath, "app.asar")
+    log.info(f"set outFilePath: {outFilePath}")
+    fileArr = listdir(path)
+
+    for name in fileArr:
+        fpath = pjoin(path, name)
+        if isdir(fpath):
+            log.error("TODO: found folder")
+            raise IsADirectoryError
+
+        scode = open(fpath, "rb").read()
+        log.info(f"open file: {name}")
+        if isfile(fpath) and name.endswith(".js"):
+            scode = encScript(scode, compress)
+
+        open(pjoin(encFilePath, name), "wb").write(scode)
+        log.success(f"encrypt and save file: {name}")
+
+    log.info("ready to pack")
+    pack_asar(encFilePath, outFilePath)
+    log.success("pack done")
+
+
+def main():
+    argParser = argparse.ArgumentParser(
+        description="[extract and decryption / pack and encryption] app.asar file from [Typora].",
+        epilog="If you have any questions, please contact [ MasonShi@88.com ]")
+    argParser.add_argument("asarPath", type=str, help="app.asar file path/dir [input/ouput]")
+    argParser.add_argument("dirPath", type=str, help="as tmp and out directory.")
+
+    argParser.add_argument('-u', dest='mode', action='store_const',
+                           const=packWenc, default=extractWdec,
+                           help='pack & encryption (default: extract & decryption)')
+    argParser.add_argument('-f', dest='format', action='store_const',
+                           const=True, default=False,
+                           help='enabled prettify/compress (default: disabled)')
+    args = argParser.parse_args()
+
+    args.mode(args.asarPath, args.dirPath, args.format)
+    log.success("Done!")
+
+
+if __name__ == '__main__':
+    main()