def _test_wipe(contents, deny_access=False, is_sparse=False):
shortname = _write_file(longname, contents)
if deny_access or is_sparse:
fh = open_file(extended_path(longname),
mode=GENERIC_WRITE | WRITE_DAC)
if is_sparse:
file_make_sparse(fh)
if deny_access:
_deny_access(fh)
close_file(fh)
logger.debug(
'test_file_wipe(): filename length={}, shortname length ={}, contents length={}, is_sparse={}'
.format(len(longname), len(shortname), len(contents),
is_sparse))
if shell.IsUserAnAdmin():
# wiping requires admin privileges
file_wipe(shortname)
file_wipe(longname)
else:
with self.assertRaises(pywintypes.error):
file_wipe(shortname)
file_wipe(longname)
self.assertExists(shortname)
os.remove(extended_path(shortname))
self.assertNotExists(shortname)
def _test_wipe(contents):
shortname = _write_file(longname, contents)
logger.debug('test_file_wipe(): filename length={}, shortname length ={}, contents length={}'.format(
len(longname), len(shortname), len(contents)))
if shell.IsUserAnAdmin():
# wiping requires admin privileges
file_wipe(shortname)
file_wipe(longname)
else:
with self.assertRaises(pywintypes.error):
file_wipe(shortname)
file_wipe(longname)
self.assertExists(shortname)
os.remove(extended_path(shortname))
self.assertNotExists(shortname)
def _test_wipe(contents):
shortname = _write_file(longname, contents)
logger.debug('test_file_wipe(): filename length={}, shortname length ={}, contents length={}'.format(
len(longname), len(shortname), len(contents)))
if shell.IsUserAnAdmin():
# wiping requires admin privileges
file_wipe(shortname)
file_wipe(longname)
else:
with self.assertRaises(pywintypes.error):
file_wipe(shortname)
file_wipe(longname)
self.assertExists(shortname)
os.remove(extended_path(shortname))
self.assertNotExists(shortname)
def wipe_contents(path, truncate=True):
"""Wipe files contents
http://en.wikipedia.org/wiki/Data_remanence
2006 NIST Special Publication 800-88 (p. 7): "Studies have
shown that most of today's media can be effectively cleared
by one overwrite"
"""
def wipe_write():
size = getsize(path)
try:
f = open(path, 'wb')
except IOError as e:
if e.errno == errno.EACCES: # permission denied
os.chmod(path, 0o200) # user write only
f = open(path, 'wb')
else:
raise
blanks = chr(0) * 4096
while size > 0:
f.write(blanks)
size -= 4096
f.flush() # flush to OS buffer
os.fsync(f.fileno()) # force write to disk
return f
if 'nt' == os.name:
from win32com.shell.shell import IsUserAnAdmin
if 'nt' == os.name and IsUserAnAdmin():
from bleachbit.WindowsWipe import file_wipe, UnsupportedFileSystemError
import warnings
from bleachbit import _
try:
file_wipe(path)
except pywinerror as e:
# 32=The process cannot access the file because it is being used by another process.
# 33=The process cannot access the file because another process has
# locked a portion of the file.
if not e.winerror in (32, 33):
# handle only locking errors
raise
# Try to truncate the file. This makes the behavior consistent
# with Linux and with Windows when IsUserAdmin=False.
try:
with open(path, 'wb') as f:
truncate_f(f)
except IOError as e2:
if errno.EACCES == e2.errno:
# Common when the file is locked
# Errno 13 Permission Denied
pass
# translate exception to mark file to deletion in Command.py
raise WindowsError(e.winerror, e.strerror)
except UnsupportedFileSystemError as e:
warnings.warn(
_('There was at least one file on a file system that does not support advanced overwriting.'), UserWarning)
f = wipe_write()
else:
# The wipe succeed, so prepare to truncate.
f = open(path, 'wb')
else:
f = wipe_write()
if truncate:
truncate_f(f)
f.close()
def wipe_contents(path, truncate=True):
"""Wipe files contents
http://en.wikipedia.org/wiki/Data_remanence
2006 NIST Special Publication 800-88 (p. 7): "Studies have
shown that most of today's media can be effectively cleared
by one overwrite"
"""
def wipe_write():
size = getsize(path)
try:
f = open(path, 'wb')
except IOError as e:
if e.errno == errno.EACCES: # permission denied
os.chmod(path, 0o200) # user write only
f = open(path, 'wb')
else:
raise
blanks = b'\0' * 4096
while size > 0:
f.write(blanks)
size -= 4096
f.flush() # flush to OS buffer
os.fsync(f.fileno()) # force write to disk
return f
if 'nt' == os.name:
from win32com.shell.shell import IsUserAnAdmin
if 'nt' == os.name and IsUserAnAdmin():
from bleachbit.WindowsWipe import file_wipe, UnsupportedFileSystemError
import warnings
from bleachbit import _
try:
file_wipe(path)
except pywinerror as e:
# 32=The process cannot access the file because it is being used by another process.
# 33=The process cannot access the file because another process has
# locked a portion of the file.
if not e.winerror in (32, 33):
# handle only locking errors
raise
# Try to truncate the file. This makes the behavior consistent
# with Linux and with Windows when IsUserAdmin=False.
try:
with open(path, 'w') as f:
truncate_f(f)
except IOError as e2:
if errno.EACCES == e2.errno:
# Common when the file is locked
# Errno 13 Permission Denied
pass
# translate exception to mark file to deletion in Command.py
raise WindowsError(e.winerror, e.strerror)
except UnsupportedFileSystemError as e:
warnings.warn(
_('There was at least one file on a file system that does not support advanced overwriting.'
), UserWarning)
f = wipe_write()
else:
# The wipe succeed, so prepare to truncate.
f = open(path, 'w')
else:
f = wipe_write()
if truncate:
truncate_f(f)
f.close()
