NAME¶
ewfacquire —
acquires data in the EWF
format
SYNOPSIS¶
| ewfacquire |
[-A
codepage]
[-b
amount_of_sectors]
[-B
amount_of_bytes]
[-c
compression_type]
[-C
case_number]
[-d
digest_type]
[-D
description]
[-e
examiner_name]
[-E
evidence_number]
[-f
format]
[-g
amount_of_sectors]
[-l
log_filename]
[-m
media_type]
[-M
media_flags]
[-N notes]
[-o
offset]
[-p
process_buffer_size]
[-P
bytes_per_sector]
[-r
read_error_retries]
[-S
segment_file_size]
[-t
target]
[-2
secondary_target]
[-hqRsuvVw]
source |
DESCRIPTION¶
ewfacquire is a utility to acquire media data from a
source and store it in EWF format (Expert Witness
Compression Format).
ewfacquire acquires media data in a
format equivalent to EnCase and FTK imager, including meta data. Under Linux,
FreeBSD, NetBSD, OpenBSD, MacOS-X/Darwin
ewfacquire supports
reading directly from device files. On other platforms
ewfacquire can convert a raw (dd) image into the EWF format.
ewfacquire is part of the
libewf package.
libewf is a library to support the Expert Witness
Compression Format (EWF).
libewf supports both the SMART
format (EWF-S01) and the EnCase format (EWF-E01).
libewf
currently does not support the Logical Volume format (EWF-L01). EWF-X is an
expirimental format intended for testing purposes to enhance the EWF format.
libewf allows you to read and write media data in the EWF
format.
source the source file or device
The options are as follows:
- -A
codepage
- the codepage of header section, options: ascii (default),
windows-874, windows-1250, windows-1251, windows-1252, windows-1253,
windows-1254, windows-1255, windows-1256, windows-1257, windows-1258
- -b
amount_of_sectors
- the amount of sectors to read at once (per chunk), options:
64 (default), 128, 256, 512, 1024, 2048, 4096, 8192, 16384 or 32768
- -B
amount_of_bytes
- the amount of bytes to acquire
- -c
compression_type
- the compression type, options: none (default), empty-block,
fast, best
- -C
case_number
- the case number (default is case_number)
- -d
digest_type
- calculate additional digest (hash) types besides md5,
options: sha1
- -D
description
- the description (default is description)
- -e
examiner_name
- the examiner name (default is examiner_name)
- -E
evidence_number
- the evidence number (default is evidence_number)
- -f
format
- the EWF file format to write to, options: ewf, smart, ftk,
encase1, encase2, encase3, encase4, encase5, encase6 (default), linen5,
linen6, ewfx.
- -g
amount_of_sectors
- the amount of sectors to be used as error granularity,
options: 64 (default), 128, 256, 512, 1024, 2048, 4096, 8192, 16384 or
32768
- -h
- shows this help
- -l
log_filename
- logs acquiry errors and the digest (hash) to the log
filename
- -m
media_type
- the media type, options: fixed (default), removable,
optical, memory
- -M
media_flags
- the media flags, options: logical, physical (default)
- -N
notes
- the notes (default is notes)
- -o
offset
- the offset to start to acquire (default is 0)
- -p
process_buffer_size
- the process buffer size (default is the chunk size)
- -P
bytes_per_sector
- the amount of bytes per sector (default is 512) (use this
to override the automatic bytes per sector detection)
- -q
- quiet shows no status information
- -r
read_error_retries
- the amount of retries when a read error occurs (default is
2)
- -R
- resume acquiry at a safe point
- -s
- swap byte pairs of the media data (from AB to BA) (use this
for big to little endian conversion and vice versa)
- -S
segment_file_size
- the segment file size in bytes (default is 1.4 GiB)
(minimum is 1.0 MiB, maximum is 7.9 EiB for encase6 format and 1.9 GiB for
other formats)
- -t
target
- the target file (without extension) to write to (default is
image)
- -u
- unattended mode (disables user interaction)
- -v
- verbose output to stderr
- -V
- print version
- -w
- wipe sectors on read error (mimic EnCase like
behavior)
- -2
secondary_target
- the secondary target file (without extension) to write
to
ewfacquire will read from a file or device until it encounters
a read error. On read error it will retry the amount of retries specified. If
ewfacquire still is unable to read and, if specified, it
will zero (wipe) the the remainder of the amount of sectors specified as error
granularity. If
ewfacquire should mimic EnCase it will wipe
all of sectors specified as error granularity.
Empty block compression detects blocks of sectors with entirely the same byte
data and compresses them using the default compression level.
The encase6 format allows for segment files greater than 2 GiB (2147483648
bytes).
ENVIRONMENT¶
None
FILES¶
None
EXAMPLES¶
ewfacquire will ask for the information it requires.
# ewfacquire /dev/fd0
ewfacquire 20090503 (libewf 20090503, libuna 20090124, zlib 1.2.3, libcrypto 0.9.8g, libuuid)
Information about acquiry required, please provide the necessary input
Image path and filename without extension: floppy
Case number: 1
Description: Floppy
Evidence number: 1.1
Examiner name: John D.
Notes: Just a floppy in my system
Media type (fixed, removable, optical, memory) [fixed]: removable
Media characteristics (logical, physical) [logical]:
Use compression (none, empty-block, fast, best) [none]:
Use EWF file format (smart, ftk, encase1, encase2, encase3, encase4, encase5, encase6, linen5, linen6, ewfx) [encase6]:
Start to acquire at offset (0 >= value >= 1474560) [0]:
The amount of bytes to acquire (0 >= value >= 1474560) [1474560]:
Evidence segment file size in bytes (1.0 MiB >= value >= 1.9 GiB) [1.4 GiB]:
The amount of bytes per sector (0 >= value >= 4294967295) [512]:
The amount of sectors to read at once (64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768) [64]:
The amount of sectors to be used as error granularity (1 >= value >= 64) [64]:
The amount of retries when a read error occurs (0 >= value >= 255) [2]:
Wipe sectors on read error (mimic EnCase like behavior) (yes, no) [no]:
The following information was provided:
Image path and filename: floppy.E01
Case number: 1
Description: Floppy
Evidence number: 1.1
Examiner name: John D.
Notes: Just a floppy in my system
Media type: removable
Is physical: no
Compression used: none
EWF file format: Encase 5
Acquiry start offset: 0
Amount of bytes to acquire: 1.4 MiB (1474560 bytes)
Evidence segment file size: 1.4 GiB (1572864000 bytes)
Block size: 64 sectors
Error granularity: 64 sectors
Retries on read error: 2
Wipe sectors on read error: no
Continue acquiry with these values (yes, no) [yes]:
Acquiry started at: Sat Feb 28 11:32:41 2009
This could take a while.
Status: at 2%.
acquired 32 kB (32768 bytes) of total 1.4 MiB (1474560 bytes).
...
Status: at 100%.
acquired 1.4 MiB (1474560 bytes) of total 1.4 MiB (1474560 bytes).
completion in 1 second(s) with 1 MiB/s (1474560 bytes/second).
Acquiry completed at: Sat Feb 28 11:32:42 2009
Written: 1.4 MiB (1474560 bytes) in 1 second(s) with 1 MiB/s (1474560 bytes/second).
MD5 hash calculated over data: ae1ce8f5ac079d3ee93f97fe3792bda3
DIAGNOSTICS¶
Errors, verbose and debug output are printed to stderr when verbose output -v is
enabled. Verbose and debug output are only printed when enabled at
compilation.
BUGS¶
Please report bugs of any kind to <forensics@hoffmannbv.nl> or on the
project website:
http://libewf.sourceforge.net/
AUTHOR¶
These man pages were written by Kees Mastwijk.
Alterations for distribution have been made by Joachim Metz.
COPYRIGHT¶
Copyright 2006-2009 Kees Mastwijk, Hoffmann Investigations
<forensics@hoffmannbv.nl> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
SEE ALSO¶
ewfacquirestream(1),
ewfexport(1),
ewfinfo(1),
ewfverify(1)
