ewfacquirestream LOCAL ewfacquirestreamNAMEewfacquirestream — acquires data in the EWF format from stdin
SYNOPSISewfacquirestream [-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]
[-l log_filename] [-m media_type] [-M media_flags]
[-N notes] [-o offset] [-p process_buffer_size]
[-S segment_file_size] [-t target] [-2 secondary_target]
[-hqsvVw]
DESCRIPTIONewfacquirestream is a utility to acquire media data from stdin and store
it in EWF format (Expert Witness Format). ewfacquirestream acquires
media data in a format equivalent to EnCase and FTK imager, including
meta data. Under Linux, FreeBSD, NetBSD, OpenBSD, MacOS-X/Darwin
ewfacquirestream 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 for‐
mat.
The options are as follows:
-A codepage
the codepage of header section, options: ascii (default), win‐
dows-874, windows-1250, windows-1251, windows-1252, windows-1253,
windows-1254, windows-1255, windows-1256, windows-1257, win‐
dows-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: ftk, encase2, encase3,
encase4, encase5, encase6 (default), linen5, linen6, ewfx.
libewf does not support streamed writes for other EWF formats.
-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)
-q quiet shows no status information
-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)
-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
ewfacquirestream will read from stding until it encounters a read error.
On read error it will stop no error information is stored in the EWF
file(s).
Empty block compression detects blocks of sectors with entirely the same
byte data and compresses them using the default compression level.
ENVIRONMENT
None
FILES
None
EXAMPLES
# ewfacquirestream-C 1 -D Floppy -E 1.1 -e 'John D.' -N 'Just a floppy in my system' -m removable -M physical -t floppy </dev/fd0
ewfacquirestream 20090229 (libewf 20090229, libuna 20090124, zlib 1.2.3, libcrypto 0.9.8g, libuuid)
Using the following acquiry parameters:
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
Volume type: physical
Compression used: none
EWF file format: EnCase 5
Acquiry start offet: 0
Amount of bytes to acquire: 0 (until end of input)
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
Acquiry started at: Sat Feb 28 11:32:41 2009
This could take a while.
Status: acquired 1.4 MiB (1474560 bytes)
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 out‐
put -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 Joachim Metz.
COPYRIGHT
Copyright 2006-2009 Joachim Metz, Hoffmann Investigations <foren‐
sics@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 PUR‐
POSE.
SEE ALSOewfacquire(1), ewfexport(1), ewfinfo(1), ewfverify(1)libewf October 17, 2009 libewf
