mirror of
https://github.com/volatilityfoundation/volatility
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iMHLv2
85 lines
3.3 KiB
Python
85 lines
3.3 KiB
Python
# Volatility
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#
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# Authors:
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# Mike Auty <mike.auty@gmail.com>
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Volatility is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import volatility.debug as debug
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import volatility.utils as utils
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import volatility.commands as commands
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class ImageCopy(commands.Command):
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"""Copies a physical address space out as a raw DD image"""
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def __init__(self, *args, **kwargs):
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commands.Command.__init__(self, *args, **kwargs)
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self._config.add_option("BLOCKSIZE", short_option = "b", default = 1024 * 1024 * 5,
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help = "Size (in bytes) of blocks to copy",
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action = 'store', type = 'int')
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self._config.add_option("OUTPUT-IMAGE", short_option = "O", default = None,
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help = "Writes a raw DD image out to OUTPUT-IMAGE",
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action = 'store', type = 'str')
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def calculate(self):
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blocksize = self._config.BLOCKSIZE
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addr_space = utils.load_as(self._config, astype = 'physical')
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available_addresses = list(addr_space.get_available_addresses())
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if not available_addresses:
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debug.error("Cannot find any memory ranges to convert. Make sure to specify --profile")
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for s, l in available_addresses:
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for i in range(s, s + l, blocksize):
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yield i, addr_space.zread(i, min(blocksize, s + l - i))
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def human_readable(self, value):
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for i in ['B', 'KB', 'MB', 'GB']:
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if value < 800:
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return "{0:0.2f} {1:s}".format(value, i)
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value = value / 1024.0
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return "{0:0.2f} TB".format(value)
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def render_text(self, outfd, data):
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"""Renders the file to disk"""
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if self._config.OUTPUT_IMAGE is None:
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debug.error("Please provide -O/--output-image=FILENAME")
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if os.path.exists(self._config.OUTPUT_IMAGE) and (os.path.getsize(self._config.OUTPUT_IMAGE) > 1):
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debug.error("Refusing to overwrite an existing file, please remove it before continuing")
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outfd.write("Writing data (" + self.human_readable(self._config.BLOCKSIZE) + " chunks): |")
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f = file(self._config.OUTPUT_IMAGE, "wb+")
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progress = 0
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try:
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for o, block in data:
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f.seek(o)
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f.write(block)
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f.flush()
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outfd.write(".")
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outfd.flush()
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progress = o
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except TypeError, why:
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debug.error("Error when reading from address space: {0}".format(why))
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except BaseException, e:
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debug.error("Unexpected error ({1}) during copy, recorded data up to offset {0:0x}".format(progress, str(e)))
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finally:
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f.close()
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outfd.write("|\n")
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