需要改入参地址和出参地址
import os
import binascii
import datetime
"""将目录下的文件按照最后修改时间顺序升序排列"""
def getFileList(path):
dirLists = os.listdir(path)
if not dirLists:
return
else:
dirLists = sorted(
dirLists, key=lambda f: os.path.getmtime(os.path.join(path, f)))
print('文件数量：{}个\n最新文件名为<{}>'.format(len(dirLists), dirLists[-1]))
return dirLists
"""获取文件的16进制前多少位，如4位、6位"""
def getFileHex(path, step):
fileName = getFileList(path)[-1]
fileData = open(path+'\\'+fileName, 'rb')
hexstr = binascii.b2a_hex(fileData.read())
hex = str(hexstr)[2:step+2] # 获取16进制前多少位，4或6位
print('dat十六进制文件头前{}位为:{}'.format(step, hex))
return hex
"""
16进制异或运算
"""
def Xor(dir):
hex2 = int(getFileHex(dir, 2), 16)
"""先取前四位，再取前两位，运算结果一致才算获得解密偏移量"""
jpg = int('ff', 16) # jpeg文件头16进制为ffd8ff
png = int('89504E47', 16) # png文件头16进制为89504E47
gif = int('47494638', 16) # gif文件头16进制为47494638
return hex(hex2 ^ jpg)
def convertImg(file, fileName, step):
dat = open(file, "rb")
out = '游艇\\其他\\'+fileName+'.jpg'
newFile = open(out, "wb")
for cur in dat:
for hex in cur:
originHex = hex ^ step
newFile.write(bytes([originHex]))
dat.close()
newFile.close()
print('转换完成文件：{}'.format(out))
def main(dir, date1, date2):
files = os.listdir(dir)
format_ = '%Y-%m-%d %H:%M:%S'
step = int(Xor(dir), 16)
print('十进制偏移量为{}'.format(step))
i = 0
for fn in files:
_path = os.path.join(dir, fn)
_time = os.path.getmtime(_path)
dt_time = datetime.datetime.fromtimestamp(_time).strftime(format_)
if dt_time < date1 or dt_time > date2:
continue
if not os.path.isdir(_path):
print('当前文件: {}' .format(_path))
convertImg(_path, fn, step)
i += 1
print('总计转换图片文件{}个'.format(i))
"""
自动判断微信PC客户端加密文件dat后缀格式图片16进制文件头
自动计算图片文件解密偏移量并转换为可用的图片文件（jpg|png|gif）
可指定具体微信图片缓存本地的日期时间范围进行转换图片提取
JPG文件头16进制为FFD8FF
PNG文件头16进制为89504E47
GIF文件头16进制为47494638
ROCEYS.CN
2019-12-26 01:16:00
"""
if __name__ == "__main__":
dir = r'\Image\2021-10'
d1 = '2021-10-02 00:12:00'
d2 = '2021-10-07 20:20:59'
main(dir, d1, d2)