mirror of
https://github.com/sqlmapproject/sqlmap.git
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97 lines
3.3 KiB
Python
97 lines
3.3 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2026 sqlmap developers (https://sqlmap.org)
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See the file 'LICENSE' for copying permission
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"""
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import functools
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import os
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import random
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import shutil
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import stat
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import string
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from lib.core.common import getSafeExString
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from lib.core.convert import getUnicode
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from lib.core.data import logger
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from lib.core.settings import PURGE_BLOCK_SIZE
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def purge(directory):
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"""
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Safely removes content from a given directory
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"""
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if not os.path.isdir(directory):
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warnMsg = "skipping purging of directory '%s' as it does not exist" % directory
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logger.warning(warnMsg)
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return
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infoMsg = "purging content of directory '%s'..." % directory
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logger.info(infoMsg)
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filepaths = []
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dirpaths = []
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for rootpath, directories, filenames in os.walk(directory):
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dirpaths.extend(os.path.abspath(os.path.join(rootpath, _)) for _ in directories)
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filepaths.extend(os.path.abspath(os.path.join(rootpath, _)) for _ in filenames)
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logger.debug("changing file attributes")
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for filepath in filepaths:
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try:
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os.chmod(filepath, stat.S_IREAD | stat.S_IWRITE)
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except:
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pass
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logger.debug("overwriting file contents")
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for filepath in filepaths:
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try:
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filesize = os.path.getsize(filepath)
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if filesize:
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# Note: NIST SP 800-88 ("Clear") / DoD 5220.22-M style multi-pass in-place overwrite
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# (zeros, ones, random) forcing each pass to disk; performed BEFORE the truncation below
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# so the original bytes are actually overwritten and not just released to free blocks.
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# Written in bounded blocks so peak memory stays O(PURGE_BLOCK_SIZE), not O(filesize)
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with open(filepath, "r+b") as f:
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for getBlock in (lambda n: b"\x00" * n, lambda n: b"\xff" * n, lambda n: os.urandom(n)):
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f.seek(0)
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remaining = filesize
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while remaining > 0:
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count = min(PURGE_BLOCK_SIZE, remaining)
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f.write(getBlock(count))
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remaining -= count
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f.flush()
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os.fsync(f.fileno())
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except:
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pass
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logger.debug("truncating files")
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for filepath in filepaths:
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try:
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with open(filepath, 'w') as f:
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pass
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except:
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pass
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logger.debug("renaming filenames to random values")
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for filepath in filepaths:
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try:
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os.rename(filepath, os.path.join(os.path.dirname(filepath), "".join(random.sample(string.ascii_letters, random.randint(4, 8)))))
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except:
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pass
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dirpaths.sort(key=functools.cmp_to_key(lambda x, y: y.count(os.path.sep) - x.count(os.path.sep)))
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logger.debug("renaming directory names to random values")
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for dirpath in dirpaths:
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try:
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os.rename(dirpath, os.path.join(os.path.dirname(dirpath), "".join(random.sample(string.ascii_letters, random.randint(4, 8)))))
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except:
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pass
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logger.debug("deleting the whole directory tree")
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try:
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shutil.rmtree(directory)
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except OSError as ex:
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logger.error("problem occurred while removing directory '%s' ('%s')" % (getUnicode(directory), getSafeExString(ex)))
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