def lzma_cable_extractor(self, fname):
# Try extracting the LZMA file without modification first
result = self.module.extractor.execute(self.original_cmd, fname)
# If the external extractor was successul (True) or didn't exist (None), don't do anything.
if result not in [True, None]:
out_name = os.path.splitext(fname)[0] + '-patched' + os.path.splitext(fname)[1]
fp_out = BlockFile(out_name, 'w')
# Use self.module.config.open_file here to ensure that other config settings (such as byte-swapping) are honored
fp_in = self.module.config.open_file(fname, offset=0, length=0)
fp_in.set_block_size(peek=0)
i = 0
while i < fp_in.length:
(data, dlen) = fp_in.read_block()
if i == 0:
out_data = data[0:5] + self.FAKE_LZMA_SIZE + data[5:]
else:
out_data = data
fp_out.write(out_data)
i += dlen
fp_in.close()
fp_out.close()
# Overwrite the original file so that it can be cleaned up if -r was specified
shutil.move(out_name, fname)
result = self.module.extractor.execute(self.original_cmd, fname)
return result
def lzma_cable_extractor(self, fname):
# Try extracting the LZMA file without modification first
result = self.module.extractor.execute(self.original_cmd, fname)
# If the external extractor was successul (True) or didn't exist (None), don't do anything.
if result not in [True, None]:
out_name = os.path.splitext(
fname)[0] + '-patched' + os.path.splitext(fname)[1]
fp_out = BlockFile(out_name, 'w')
# Use self.module.config.open_file here to ensure that other config settings (such as byte-swapping) are honored
fp_in = self.module.config.open_file(fname, offset=0, length=0)
fp_in.set_block_size(peek=0)
i = 0
while i < fp_in.length:
(data, dlen) = fp_in.read_block()
if i == 0:
out_data = data[0:5] + self.FAKE_LZMA_SIZE + data[5:]
else:
out_data = data
fp_out.write(out_data)
i += dlen
fp_in.close()
fp_out.close()
# Overwrite the original file so that it can be cleaned up if -r was specified
shutil.move(out_name, fname)
self.module.extractor.execute(self.original_cmd, fname)
def lzma_cable_extractor(self, fname):
result = False
out_name = os.path.splitext(fname)[0] + '-patched' + os.path.splitext(fname)[1]
fp_out = BlockFile(out_name, 'w')
# Use self.module.config.open_file here to ensure that other config
# settings (such as byte-swapping) are honored
fp_in = self.module.config.open_file(fname, offset=0, length=0)
fp_in.set_block_size(peek=0)
i = 0
while i < fp_in.length:
(data, dlen) = fp_in.read_block()
if i == 0:
out_data = data[0:5] + self.FAKE_LZMA_SIZE + data[5:]
else:
out_data = data
fp_out.write(out_data)
i += dlen
fp_in.close()
fp_out.close()
for rule in self.module.extractor.get_rules(self.SIGNATURE):
if rule['cmd'] != self.lzma_cable_extractor:
result = self.module.extractor.execute(rule['cmd'], out_name)
if result == True:
break
os.remove(out_name)
return result
def _dd(self, file_name, offset, size, extension, output_file_name=None):
'''
Extracts a file embedded inside the target file.
@file_name - Path to the target file.
@offset - Offset inside the target file where the embedded file begins.
@size - Number of bytes to extract.
@extension - The file exension to assign to the extracted file on disk.
@output_file_name - The requested name of the output file.
Returns the extracted file name.
'''
total_size = 0
# Default extracted file name is <hex offset>.<extension>
default_bname = "%X" % offset
if self.max_size and size > self.max_size:
size = self.max_size
if not output_file_name or output_file_name is None:
bname = default_bname
else:
# Strip the output file name of invalid/dangerous characters (like file paths)
bname = os.path.basename(output_file_name)
fname = unique_file_name(bname, extension)
try:
# Open the target file and seek to the offset
fdin = self.config.open_file(file_name, length=size, offset=offset)
# Open the output file
try:
fdout = BlockFile(fname, 'w')
except KeyboardInterrupt as e:
raise e
except Exception as e:
# Fall back to the default name if the requested name fails
fname = unique_file_name(default_bname, extension)
fdout = BlockFile(fname, 'w')
while total_size < size:
(data, dlen) = fdin.read_block()
if not data:
break
else:
fdout.write(str2bytes(data[:dlen]))
total_size += dlen
# Cleanup
fdout.close()
fdin.close()
except KeyboardInterrupt as e:
raise e
except Exception as e:
raise Exception(
"Extractor.dd failed to extract data from '%s' to '%s': %s" %
(file_name, fname, str(e)))
return fname
def _dd(self, file_name, offset, size, extension, output_file_name=None):
'''
Extracts a file embedded inside the target file.
@file_name - Path to the target file.
@offset - Offset inside the target file where the embedded file begins.
@size - Number of bytes to extract.
@extension - The file exension to assign to the extracted file on disk.
@output_file_name - The requested name of the output file.
Returns the extracted file name.
'''
total_size = 0
# Default extracted file name is <hex offset>.<extension>
default_bname = "%X" % offset
if self.max_size and size > self.max_size:
size = self.max_size
if not output_file_name or output_file_name is None:
bname = default_bname
else:
# Strip the output file name of invalid/dangerous characters (like file paths)
bname = os.path.basename(output_file_name)
fname = unique_file_name(bname, extension)
try:
# Open the target file and seek to the offset
fdin = self.config.open_file(file_name, length=size, offset=offset)
# Open the output file
try:
fdout = BlockFile(fname, 'w')
except KeyboardInterrupt as e:
raise e
except Exception as e:
# Fall back to the default name if the requested name fails
fname = unique_file_name(default_bname, extension)
fdout = BlockFile(fname, 'w')
while total_size < size:
(data, dlen) = fdin.read_block()
if not data:
break
else:
fdout.write(str2bytes(data[:dlen]))
total_size += dlen
# Cleanup
fdout.close()
fdin.close()
except KeyboardInterrupt as e:
raise e
except Exception as e:
raise Exception("Extractor.dd failed to extract data from '%s' to '%s': %s" % (file_name, fname, str(e)))
binwalk.core.common.debug("Carved data block 0x%X - 0x%X from '%s' to '%s'" % (offset, offset+size, file_name, fname))
return fname
def _dd(self, file_name, offset, size, extension, output_file_name=None):
'''
Extracts a file embedded inside the target file.
@file_name - Path to the target file.
@offset - Offset inside the target file where the embedded file begins.
@size - Number of bytes to extract.
@extension - The file exension to assign to the extracted file on disk.
@output_file_name - The requested name of the output file.
Returns the extracted file name.
'''
total_size = 0
# Default extracted file name is <displayed hex offset>.<extension>
default_bname = "%X" % (offset + self.config.base)
if self.max_size and size > self.max_size:
size = self.max_size
if not output_file_name or output_file_name is None:
bname = default_bname
else:
# Strip the output file name of invalid/dangerous characters (like file paths)
bname = os.path.basename(output_file_name)
fname = unique_file_name(bname, extension)
try:
# If byte swapping is enabled, we need to start reading at a swap-size
# aligned offset, then index in to the read data appropriately.
if self.config.swap_size:
adjust = offset % self.config.swap_size
else:
adjust = 0
offset -= adjust
# Open the target file and seek to the offset
fdin = self.config.open_file(file_name)
fdin.seek(offset)
# Open the output file
try:
fdout = BlockFile(fname, 'w')
except KeyboardInterrupt as e:
raise e
except Exception as e:
# Fall back to the default name if the requested name fails
fname = unique_file_name(default_bname, extension)
fdout = BlockFile(fname, 'w')
while total_size < size:
(data, dlen) = fdin.read_block()
if not data:
break
else:
total_size += (dlen-adjust)
if total_size > size:
dlen -= (total_size - size)
fdout.write(str2bytes(data[adjust:dlen]))
adjust = 0
# Cleanup
fdout.close()
fdin.close()
except KeyboardInterrupt as e:
raise e
except Exception as e:
raise Exception("Extractor.dd failed to extract data from '%s' to '%s': %s" % (file_name, fname, str(e)))
binwalk.core.common.debug("Carved data block 0x%X - 0x%X from '%s' to '%s'" % (offset, offset+size, file_name, fname))
return fname
def _dd(self, file_name, offset, size, extension, output_file_name=None):
'''
Extracts a file embedded inside the target file.
@file_name - Path to the target file.
@offset - Offset inside the target file where the embedded file begins.
@size - Number of bytes to extract.
@extension - The file exension to assign to the extracted file on disk.
@output_file_name - The requested name of the output file.
Returns the extracted file name.
'''
total_size = 0
# Default extracted file name is <displayed hex offset>.<extension>
default_bname = "%X" % (offset + self.config.base)
if self.max_size and size > self.max_size:
size = self.max_size
if not output_file_name or output_file_name is None:
bname = default_bname
else:
# Strip the output file name of invalid/dangerous characters (like
# file paths)
bname = os.path.basename(output_file_name)
fname = unique_file_name(bname, extension)
try:
# If byte swapping is enabled, we need to start reading at a swap-size
# aligned offset, then index in to the read data appropriately.
if self.config.swap_size:
adjust = offset % self.config.swap_size
else:
adjust = 0
offset -= adjust
# Open the target file and seek to the offset
fdin = self.config.open_file(file_name)
fdin.seek(offset)
# Open the output file
try:
fdout = BlockFile(fname, 'w')
except KeyboardInterrupt as e:
raise e
except Exception as e:
# Fall back to the default name if the requested name fails
fname = unique_file_name(default_bname, extension)
fdout = BlockFile(fname, 'w')
while total_size < size:
(data, dlen) = fdin.read_block()
if dlen < 1:
break
else:
total_size += (dlen - adjust)
if total_size > size:
dlen -= (total_size - size)
fdout.write(str2bytes(data[adjust:dlen]))
adjust = 0
# Cleanup
fdout.close()
fdin.close()
except KeyboardInterrupt as e:
raise e
except Exception as e:
raise Exception("Extractor.dd failed to extract data from '%s' to '%s': %s" %
(file_name, fname, str(e)))
binwalk.core.common.debug("Carved data block 0x%X - 0x%X from '%s' to '%s'" %
(offset, offset + size, file_name, fname))
return fname