mirror of
https://github.com/LC044/WeChatMsg
synced 2024-11-16 15:11:41 +08:00
92 lines
2.6 KiB
Python
92 lines
2.6 KiB
Python
import os
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# 图片字节头信息，
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# [0][1]为jpg头信息，
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# [2][3]为png头信息，
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# [4][5]为gif头信息
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pic_head = [0xff, 0xd8, 0x89, 0x50, 0x47, 0x49]
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# 解密码
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decode_code = 0
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def get_code(file_path):
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"""
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自动判断文件类型，并获取dat文件解密码
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:param file_path: dat文件路径
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:return: 如果文件为jpg/png/gif格式，则返回解密码，否则返回-1
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"""
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if os.path.isdir(file_path):
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return -1, -1
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# if file_path[-4:] != ".dat":
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# return -1, -1
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dat_file = open(file_path, "rb")
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dat_read = dat_file.read(2)
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# print(dat_read)
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head_index = 0
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while head_index < len(pic_head):
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# 使用第一个头信息字节来计算加密码
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# 第二个字节来验证解密码是否正确
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code = dat_read[0] ^ pic_head[head_index]
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idf_code = dat_read[1] ^ code
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head_index = head_index + 1
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if idf_code == pic_head[head_index]:
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dat_file.close()
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return head_index, code
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head_index = head_index + 1
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dat_file.close()
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print("not jpg, png, gif")
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return -1, -1
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def decode_dat(file_path, out_path):
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"""
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解密文件，并生成图片
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:param file_path: dat文件路径
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:return: 无
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"""
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if not os.path.exists(file_path):
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return None
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file_type, decode_code = get_code(file_path)
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if decode_code == -1:
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return
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filename = os.path.basename(file_path)
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if file_type == 1:
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pic_name = os.path.basename(file_path)[:-4] + ".jpg"
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elif file_type == 3:
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pic_name = filename[:-4] + ".png"
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elif file_type == 5:
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pic_name = filename[:-4] + ".gif"
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else:
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pic_name = filename[:-4] + ".jpg"
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file_outpath = os.path.join(out_path, pic_name)
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if os.path.exists(file_outpath):
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return file_outpath
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with open(file_path, 'rb') as file_in:
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data = file_in.read()
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# 对数据进行异或加密/解密
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with open(file_outpath, 'wb') as file_out:
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file_out.write(bytes([byte ^ decode_code for byte in data]))
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print(file_path, '->', file_outpath)
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return file_outpath
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def find_datfile(dir_path, out_path):
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"""
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获取dat文件目录下所有的文件
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:param dir_path: dat文件目录
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:return: 无
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"""
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files_list = os.listdir(dir_path)
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for file_name in files_list:
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file_path = dir_path + "\\" + file_name
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decode_dat(file_path, out_path)
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if __name__ == "__main__":
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path = "E:\86390\Documents\WeChat Files\wxid_27hqbq7vx5hf22\FileStorage\CustomEmotion\\71\\"
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outpath = "D:\\test"
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if not os.path.exists(outpath):
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os.mkdir(outpath)
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find_datfile(path, outpath)
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