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PROGRAM:

NAME


jacksum - computes checksums, CRCs and message digests

SYNOPSIS


jacksum [OPTIONS]... [FILE]...
java -jar /usr/share/java/jacksum.jar [OPTIONS]... [FILE]...
java -cp /usr/share/java/jacksum.jar Jacksum [OPTIONS]... [FILE]...

DESCRIPTION


Jacksum is a free and platform independent utility for computing and verifying checksums,
CRCs and hashes (message digests) as well as timestamps of files. Jacksum is written
entirely in Java. A Java Runtime Environment (JRE), at least version 1.3.1 or any
equivalent JRE is required. At least JRE 1.4.2 is recommended.

The following parameters are supported:

file a path name of a file to be checked. Wildcards are supported. They depend on the
shell you are running. With no file, or when the file is character "-", standard
input is read.

The following options are supported:

-a algo
the algorithm, default is sha-1 since Jacksum 1.0.0, see also -A. Algorithms can
be combinded by the plus character, e. g. "sha1+crc32", "bsd+crc24+xor8". If you
specify "-a all" all supported algorithms are used, see also -F. As soon as "all"
or a plus character is used, the output is normalized with a hex checksum and a
decimal filesize. Examples: "sha+", "md5+". Feature available since Jacksum 1.7.0,
see also -A, -F.

-A Alternate. By default Jacksum uses algorithms provided by the Java API if
available, because those are optimized by the JVM vendor, they usually provide very
good performance. If -A is set, Jacksum uses an alternate, pure Java
implementation of an algorithm (if available). Actually, Jacksum supports alternate
implementations for the following algorithms: adler32, crc32, md5, sha-1, sha-256,
sha-384, sha-512 since Jacksum 1.5.0, see also -a.

-c list
checks the integrity against a given list. The list is usually a former output of
Jacksum, ideally created with option -m. You can also check against a list which
was created by a different application. In this case, you need to specify all
parameters which are necessary to produce the same output. The parameter -F will be
ignored. To exclude files, just remove lines from the list. Feature available
since Jacksum 1.3.0, see also -l -I and -m.

-d directories (regular) only. Don't follow symbolic links on Linux/Unix. A symbolic
link from a subfolder to a parent folder could cause endless loops under Unix/Linux
while recursively traversing the tree. If this option is set, symbolic links to
directories will be ignored. This option will be ignored under Windows. Feature
available since Jacksum 1.5.0, See also -r.

-e seq expectation. A sequence for the calculation is expected. Works with a file,
standard input or option -q. Returns OK (exit code 0) or MISMATCH (exit code 1).
Available since Jacksum 1.4.0. Works also with multiple files or directories to
find duplicates, in which case all findings are printed out. The sequence can be
specified either case sensitive or case insensitive, except if Base 64 encoding (by
-E) has been specified. Available since Jacksum 1.6.0, see also -a, -q, -E, -x and
-X.

-E encoding
encoding. The checksum can be encoded:

bin Binary
dec Decimal
oct Octal
hex Hexadecimal in lowercase (same as -x)
hexup Hexadecimal in uppercase (same as -X)
base16 Base 16 (as defined by RFC 3548)
base32 Base 32 (as defined by RFC 3548)
base64 Base 64 (as defined by RFC 3548)
bb BubbleBabble (used by OpenSSH and SSH2)

available since Jacksum 1.6.0, see also -x and -X.

-f process files only, this option suppresses the messages "... Is a
directory" and " ... Is not a regular file". Available since
Jacksum 1.0.0, see also -V.

-F format
Set a customizable output format to overwrite the default.
Available since Jacksum 1.5.0, if not other specified, see also
-a, -E, -g, -G, -p, -P, -s, -t, -x, -X.

#ALGONAME will be replaced by the name of the algorithm
#ALGONAME{i} see also #CHECKSUM{i}
#CHECKSUM will be replaced by the hash, CRC or sum value
(depends on -a, -b, -g, -G, -x, -X)
#CHECKSUM{i} If the character called + has been used to
separate multiple algorithms at option -a, the
token will be replaced with the checksum. The
token is indexed by a number. If you use the
character called i rather than a number, it
works like an automatic index. (1.6)
#FILENAME will be replaced by the filename and path (depends
on -p and -P)
#FILENAME{NAME} will be replaced by the filename (1.5)
#FILENAME{PATH} will be replaced by the filepath (1.5)
#FILESIZE will be replaced by the filesize
#FINGERPRINT is an alias for #CHECKSUM
#SEPARATOR will be replaced by the separator which you can
specify with -s
#TIMESTAMP will be replaced by the timestamp (depends on -t)
#QUOTE will be replaced by one quote char (")

-g count
group the hex output for the checksum in "count" bytes for better readability. Only
valid if encoding is hex or hexup. Groups are separated by a blank or by the
character specified by -G. The value for count must be greater than 0. Available
since Jacksum 1.6.0, see also -E, -G, -x and -X -G char group character. Only valid
if encoding is hexadecimal and -g has been set.

-h [lang] [section]
print help, valid codes for "lang" are "en" or "de", default is "en"; valid values
for "section" are strings like headers or options. See section EXAMPLES for more
information. Available since Jacksum 1.0.0, parameter section since Jacksum 1.6.0,
see also -v.

-I string
ignore. While creating a list by -m or reading a list by -c, lines are ignored if
they start with the specified string. Available since Jacksum 1.6.0, see also -c
and -m.

-l list. Just list files which were modified or deleted. In combination with -c only.
Available since Jacksum 1.4.0, see also -c.

-m print metainfo. Additional lines will be printed. With the metainfo available you
can check files against a given list without the need to specify a lot of
commandline parameters. Any customized format you can normally specify with -F are
ignored. Available since Jacksum 1.3.0, see also -c.

-o file
output. The output of the program goes to a file rather than the standard output.
The program exits with a warning if the file exists. The file which is specified by
-o is excluded from the calculation process. Available since Jacksum 1.6.0, see
also -O, -u and -U.

-O file
output. Same as -o, however an existing file will be overwritten without any
warning. See also -U. Available since Jacksum 1.6.0, see also -o, -u and -U.

-p path. Put the path info on each line, instead of printing a header for each
directory while processing folders recursively (-r). With this option the output
will increase, but on the flip side it will be much easier to sort or grep the
lines with corresponding programs. Available since Jacksum 1.4.0, see also -F, -P,
-r and -w.

-P char
path separator. By default, the system-dependent default file name separator
character is used. On Unix systems the character is the slash (/), on Microsoft
Windows systems it is the back slash (\). You can change the default if a special
output format for filenames (such as HTML links) is required. Available since
Jacksum 1.5.0, see also -F and -p.

-q [type:]seq
process a sequence quickly and quit the program. The type can be used to specify
the type of the sequence (text, hexadecimal or decimal):

txt:Example1
hex:4578616D706C6531
dec:69,120,97,109,112,108,101,49
4578616D706C6531

If type is not set, the seq is expected to be in hex form. If type is set to
"txt", the platform's default charset will be used to interpret the sequence called
seq. Available since Jacksum 1.3.0 (hex only), type since 1.5.0.

-r process subdirectory recursively (without a file parameter the current directory is
used). Available since Jacksum 1.0.0, see also -p and -w.

-s sep a custom separator string (\t, \n, \r, \", \' and \\ will be translated). The
default value depends on the checksum algorithm. Available since Jacksum 1.0.0, see
also -F.

-S summary. This calculates just one checksum value. All files, the directory
structures, the filenames and timestamps (if requested) are part of that checksum.
See also -w. Available since Jacksum 1.5.0, see also -r and -w.

-t form
a timestamp format. Java's formatter class SimpleDateFormat will be used. Valid
characters are

G Era designator
y Year
M Month in year
w Week in year
W Week in month
D Day in year
d Day in month
F Day of week in month
E Day in week
a AM/PM marker
H Hour in day (0-23)
k Hour in day (1-24)
K Hour in am/pm (0-11)
h Hour in am/pm (1-12)
m Minute in hour
s Second in minute
S Millisecond
z Time zone, general
Z Time zone, RFC 822

If form is set to the word "default", timestamps will be formatted with
"yyyyMMddHHmmss". since Jacksum 1.3.0

#SEPARATOR will be replaced by the separator which you
can specify with -s
#QUOTE will be replaced by one quote char (")

Available since Jacksum 1.6.0, see also -F.

-u file
ugly, undesirable, unforeseen, uninvited. Any error messages of the program is
redirected to a file rather than the standard error. The program exits if the file
exists. The file which is specified by -u is excluded from the calculation
process. Available since Jacksum 1.6.0, see also -U, -o and -O.

-U file
ugly, undesirable, unforeseen, uninvited. Same as -u, however an existing file will
be overwritten without any warning. See also -O. Available since Jacksum 1.6.0,
see also -u, -o and -O.

-v version. Prints the product version and exits. Available since Jacksum 1.2.0, see
also -h.

-V control
verbose. Prints additional information. If -V is the only parameter it behaves like
-v. "control" can be one of the following keywords which must be separated by a
comma:

details | nodetails Errors with or without details
warnings | nowarnings Warnings or no warnings
summary | nosummary Summary at the end or not

If control is set to "default", control is set to "details,warnings,nosummary".
Available since Jacksum 1.6.0, see also -f and -v.

-w The file parameter (the last parameter) is intended to be the working directory.
This allows to create relative path names rather than absolute ones. Only valid if
the file parameter is a directory. Available since Jacksum 1.6.0, see also -r and
-S.

-x lowercase hex output for the checksum, it is an alias for -E hex. Available since
Jacksum 1.1.0, see also -E.

-X uppercase hex output for the checksum, it is an alias for -E hexup. Available
since Jacksum 1.1.0, see also -E.

The following algorithms are supported:

adler32, adler-32
algorithm:
Adler32 [java.util.zip.Adler32]
length:
32 bits
type:
checksum, 1995
since:
Jacksum 1.0.0 (alias "adler-32" since 1.2.0)
comment:
Adler32 was invented by Mark Adler in 1995.
The specification for Adler32 may be found
in RFC 1950. Adler32 is a 32-bit extension
and improvement of the Fletcher algorithm,
used in the ITU-T X.224 / ISO 8073 standard.
[jonelo.jacksum.algorithm.Adler32alt] is the
alternate implementation and it is used if
option -A is specified.

bsd, bsdsum, sumbsd
algorithm:
BSD checksum algorithm
length:
16 bits
type:
checksum
since:
Jacksum 1.0.0 (alias "bsdsum" since 1.2.0, alias
"sumbsd" since 1.6.0)
comment:
output format is exactly like the native
program sum (size in 1024 byte blocks)
see also sysv
- under BeOS it is /bin/sum [-r]
- under FreeBSD it is /usr/bin/sum
and /usr/bin/cksum -o 1
- under HP-UX it is /usr/bin/sum -r
- under IBM AIX it is /usr/bin/sum [-r]
- under Linux it is /usr/bin/sum [-r]
- under MacOS X it is /usr/bin/sum
and /usr/bin/cksum -o 1
- under Solaris it is /usr/ucb/sum
- under Windows there is no sum

cksum
algorithm:
POSIX 1003.2 CRC algorithm
length:
32 bits
type:
crc
since:
Jacksum 1.0.0
comment:
- under BeOS it is /bin/cksum
- under FreeBSD it is /usr/bin/cksum
- under HP-UX it is /usr/bin/cksum and
/usr/bin/sum -p
- under IBM AIX it is /usr/bin/cksum
- under Linux it is /usr/bin/cksum
- under MacOS X it is /usr/bin/cksum
- under Solaris it is /usr/bin/cksum
- under Tru64 ist es /bin/cksum (CMD_ENV=xpg4)
- under Windows there is no cksum
The POSIX CRC cannot be described completely
by the Rocksoft-Model, because the algorithm
appends the message with its length. Without
this special, the code would be:
crc:32,04C11DB7,0,false,false,FFFFFFFF

crc64, crc-64
algorithm:
CRC-64
length:
64 bits
type:
crc:64,1B,0,true,true,0
since:
Jacksum 1.5.0
comment:
this algorithm is described in the
ISO 3309 standard.
(generator poly is x^64 + x^4 + x^3 + x + 1)

elf, elf32, elf-32
algorithm:
ELF
length:
32 bits
type:
hash
since:
Jacksum 1.5.0
comment:
hash function used in the Unix ELF (Executable
and Linkable Format) for object files.

ed2k, emule, edonkey
algorithm:
eMule/eDonkey
length:
128 bits
type:
hash
since:
Jacksum 1.5.0
comment:
this algorithm is used in eDonkey resp. eMule,
it is based on MD4, but returns different
fingerprints for files >= 9500 KB.

gost
algorithm:
GOST R 34.11-94
[org.bouncycastle.crypto.digests.GOST3411Digest]
length:
256 bits
type:
hash, 1994
since:
Jacksum 1.6.0
comment:
"GOsudarstvennyi STandard", Russian for
"Government Standard". Published in 1994 as
the Soviet Standard GOST-R-34.11-94.

has160, has-160, has160
algoritm:
HAS-160 [gnu.crypto.hash.Has160 (jonelo)]
length:
160 bits
type:
hash, 2000
since:
Jacksum 1.7.0
comment:
HAS-160 is both a cryptographic hash function and
a Korean TTA-Standard (Telecommunications and
and Technology Association).

haval, haval_<b>_<r>
algorithm:
Haval [gnu.crypto.hash.Haval]
length:
128, 160, 192, 224 or 256 bits
type:
hash, 1992
since:
Jacksum 1.4.0
comment:
Haval was invented by Yuliang Zheng, Josef
Pieprzyk, and Jennifer Seberry in 1992.
The Haval message-digest algorithm has a
variable output length, with variable number of
rounds. The output length <b> can vary from 128
to 256 bits in increments of 32 bits. The
number of rounds <r> can vary from 3 to 5. The
default values (just "haval") are 128 and 3.

md2, md2sum
algorithm:
MD2 [gnu.crypto.hash.MD2]
length:
128 bits
type:
hash, 1989
since:
Jacksum 1.2.0
comment:
the MD2 message digest algorithm as defined in
RFC 1319;
RSA Laboratories, in their Bulletin #4, dated
November 12, 1996, recommends to update
applications away from MD2 whenever it is
practical.
Jacksum supports MD2 for compatibility and educational
purposes.

md4, md4sum
algorithm:
MD4 [gnu.crypto.hash.MD4]
length:
128 bits
type:
hash, 1990
since:
Jacksum 1.2.0
comment:
the MD4 message digest algorithm as defined in
RFC 1320;
RSA Laboratories, in their Bulletin #4, dated
November 12, 1996, recommends that MD4 should
not be used.
Jacksum supports MD4 for compatibility and educational
purposes.

md5, md5sum
algorithm:
MD5 [java.security.MessageDigest]
length:
128 bits
type:
hash, 1991
since:
Jacksum 1.0.0
comment:
The MD5 message digest algorithm was designed by
Ronald Rivest in 1991, and it is defined in
RFC 1321. [gnu.crypto.hash.MD5] is the alternate
implementation and it will be used if you have
set the option -A.
- under BeOS it is /bin/md5sum
- under FreeBSD it is /sbin/md5
- under HP-UX there is no md5 or md5sum
- under Linux it is /usr/bin/md5sum
- under MacOS X it is /usr/bin/md5
- under Solaris it is /usr/sbin/md5 (SUNWkeymg)
- under Windows there is no md5 or md5sum

none
algorithm:
none
length:
0 bits
type:
n/a
since:
Jacksum 1.6.0
comment:
Calculates no checksum, it does not read the
content of files, it just determines the
filesize (and timestamp if required)

crc:<params>
algorithm:
CRC
length:
8..64 bits
type:
crc
since:
Jacksum 1.7.0
comment:
With this generic CRC you can specify all CRC-
algorithms which can be described by the famous
"Rocksoft (tm) Model CRC Algorithm".
<params> must have 6 values, which must be
separated by a comma. Those are:
width,poly,init,refIn,refOut,xorOut

width - width of the crc, expressed in bits.
This is one less than the width of
the poly.

poly - the polynomial, specify as hex
The top bit of the poly should be
omitted. For example, if the poly is
10110, you should specify 06. An
important aspect of this parameter
is that it represents the unreflected
poly; the bottom bit of this parameter
is always the LSB of the divisor
during the division regardless of
whether the algorithm being modelled
is reflected.

init - this parameter specifies the initial
value of the register when the
algorithm starts. Specify as hex.

refIn - this is a boolean parameter. If it
is false, input bytes are processed
with bit 7 being treated as the most
significant bit (MSB) and bit 0 being
treated as the least significant bit.
If this parameter is false, each byte
is reflected before being processed.
true or false

refOut - this is a boolean parameter. If it is
set to false, the final value in the
register is fed into the xorOut stage
directly, otherwise, if this parameter
is true, the final register value is
reflected first.

xorOut - this value is XORed to the final
register value (after the refOut)
stage before the value is returned as
the official checksum, specify as hex

read
algorithm:
read
length:
0 bits
type:
n/a
since:
Jacksum 1.6.0
comment:
Calculates no checksum, but it does read the
content of files, it also determines the
filesize (and timestamp if required)

rmd128, rmd-128, ripemd128, ripemd-128, ripe-md128
algorithm:
RIPEMD-128 [gnu.crypto.hash.RipeMD128]
length:
128 bits
type:
hash
since:
Jacksum 1.2.0 (alias rmd128/rmd-128 since 1.4.0)
comment:
a message digest, see also RIPEMD-160

rmd160, rmd-160, ripemd160, ripemd-160, ripe-md160
algorithm:
RIPEMD-160 [gnu.crypto.hash.RipeMD160]
length:
160 bits
type:
hash, 1996
since:
Jacksum 1.2.0 (alias rmd160/rmd-160 since 1.4.0)
comment:
RIPEMD was developed in the framework of the
EU project RIPE (RACE Integrity Primitives
Evaluation), used by GnuPG

rmd256, rmd-256, ripemd256, ripemd-256, ripe-md256
algorithm:
RIPEMD-256 [org.bouncycastle.crypto.digests]
length:
256 bits
type:
hash
since:
Jacksum 1.6.0
comment:
a message digest, see also RIPEMD-160
RIPEMD-256 is as secure as RIPEMD-128

rmd320, rmd-320, ripemd320, ripemd-320, ripe-md320
algorithm:
RIPEMD-320 [org.bouncycastle.crypto.digests]
length:
128 bits
type:
hash
since:
Jacksum 1.6.0
comment:
a message digest, see also RIPEMD-160
RIPEMD-320 is as secure as RIPEMD-160

sha0, sha-0
algorithm:
SHA-0 [gnu.crypto.hash.Sha0 (jonelo)]
length:
160 bits
type:
hash, 1993
since:
Jacksum 1.6.0
comment:
the Secure Hash Algorithm, as defined 1993 in
the National Institute for Standards and
Technology's Federal Information Processing
Standard (FIPS PUB 180).
It was withdrawn by NSA shortly after
publication and was superseded by the revised
version, published in 1995 in FIPS PUB 180-1
and commonly referred to as "SHA-1".

sha, sha1, sha-1, sha160, sha-160
algorithm:
SHA-1 [java.security.MessageDigest]
length:
160 bits
type:
hash, 1995
since:
Jacksum 1.0.0 (alias sha-1 since 1.2.0, alias
sha-160. sha160 and sha-160 since 1.5.0, default
algorithm since 1.5.0.
comment:
the Secure Hash Algorithm, as defined 1995 in
the National Institute for Standards and
Technology's Federal Information Processing
Standard (NIST FIPS 180-1).
[gnu.crypto.hash.Sha160] is the alternate
implementation and it will be used if you have
specified option -A.
- under BeOS there is no sha1
- under FreeBSD it is /sbin/sha1
- under HP-UX there is no sha1
- under Linux it is /usr/bin/sha1sum
- under MacOS X there is no sha1
- under Solaris there is no sha1
- under Windows there is no sha1

sha224, sha-224
algorithm:
SHA-224 [gnu.crypto.hash.Sha224 (jonelo)]
length:
224 bits
type:
hash, 2004
since:
Jacksum 1.6.0
comment:
the Secure Hash Algorithm, as defined 2004 in
the National Institute for Standards and
Technology's Federal Information Processing
Standard (NIST FIPS 180-2) and in RFC 3874.
SHA-224 is based on SHA-256, but it uses a
different initial value and the final hash
is truncated to 224 bits.

sha256, sha-256
algorithm:
SHA-256 [java.security.MessageDigest]
length:
256 bits
type:
hash, 2001
since:
Jacksum 1.3.0
comment:
the Secure Hash Algorithm, as defined 2001 in
the National Institute for Standards and
Technology's Federal Information Processing
Standard (NIST FIPS 180-2).
[gnu.crypto.hash.Sha256] is an alternate
implementation and it is used if you have a
JRE < 1.4.2 or if you have specified option -A.

sha384, sha-384
algorithm:
SHA-384 [java.security.MessageDigest]
length:
384 bits
type:
hash, 2001
since:
Jacksum 1.3.0
comment:
the Secure Hash Algorithm, as defined 2001 in
the National Institute for Standards and
Technology's Federal Information Processing
Standard (NIST FIPS 180-2).
[gnu.crypto.hash.Sha384] is an alternate
implementation and it is used if you have a
JRE < 1.4.2 or if you have specified option -A.

crc8, crc-8
algorithm:
CRC-8
length:
8 bits
type:
crc:8,7,0,false,false,0
since:
Jacksum 1.6.0
comment:
this implementation of the CRC-8 (cyclic
redundancy check) is used in the
System Management Bus (SMBus) and the
Free Lossless Audio Codec (FLAC) for example
(generator poly x^8 + x^2 + x^1 + 1)

sha512, sha-512
algorithm:
SHA-512 [java.security.MessageDigest]
length:
512 bits
type:
hash, 2001
since:
Jacksum 1.3.0
comment:
the Secure Hash Algorithm, as defined 2001 in
the National Institute for Standards and
Technology's Federal Information Processing
Standard (NIST FIPS 180-2).
[gnu.crypto.hash.Sha512] is an alternate
implementation and it is used if you have a
JRE < 1.4.2 or if you have specified option -A.

sum8, sum-8
algorithm:
Sum 8
length:
8 bits
type:
checksum
since:
Jacksum 1.3.0
comment:
value computed by adding together all values
in the input data stream modulo 2^8.
This algorithm doesn't care about the
arrangement of bytes.

sum16, sum-16
algorithm:
Sum 16
length:
16 bits
type:
checksum
since:
Jacksum 1.3.0
comment:
value computed by adding together all values
in the input data stream modulo 2^16.
This algorithm doesn't care about the
arrangement of bytes.

sum24, sum-24
algorithm:
Sum 24
length:
24 bits
type:
checksum
since:
Jacksum 1.3.0
comment:
value computed by adding together all values
in the input data stream modulo 2^24.
This algorithm doesn't care about the
arrangement of bytes.

sum32, sum-32
algorithm:
Sum 32
length:
32 bits
type:
checksum
since:
Jacksum 1.3.0
comment:
value computed by adding together all values
in the input data stream modulo 2^32.
This algorithm doesn't care about the
arrangement of bytes.

sysv, sysvsum, sumsysv
algorithm:
UNIX System V checksum algorithm
length:
16 bits
type:
checksum, 1985
since:
Jacksum 1.2.0, alias "sumsysv" since 1.6.0
comment:
output format is exactly like the properitary
program sum (size in 512 bytes blocks),
see also bsd
- under BeOS it is /bin/sum -s
- under FreeBSD it is /usr/bin/cksum -o 2
- under HP-UX it is /usr/bin/sum
- under Linux it is /usr/bin/sum -s
- under MacOS X it is /usr/bin/cksum -o 2
- under Solaris it is /usr/bin/sum
- under Windows there is no sum

tiger128, tiger-128
algorithm:
Tiger 128 [gnu.crypto.hash.Tiger160 (by jonelo)]
length:
128 bits
type:
hash, 1995
since:
Jacksum 1.6.0
comment:
the hash value is the first 128 bits of the
result of Tiger-192

tiger160, tiger-160
algorithm:
Tiger 160 [gnu.crypto.hash.Tiger160 (by jonelo)]
length:
160 bits
type:
hash, 1995
since:
Jacksum 1.6.0
comment:
the hash value is the first 160 bits of the
result of Tiger-192

tiger, tiger192, tiger-192
algorithm:
Tiger [gnu.crypto.hash.Tiger]
length:
192 bits
type:
hash, 1995
since:
Jacksum 1.4.0
comment:
developed by Ross Anderson and Eli Biham, 1995

tiger2
algorithm:
Tiger2 [gnu.crypto.hash.Tiger2 (jonelo)]
length:
192 bits
type:
hash, 2005
since:
Jacksum 1.6.0
comment:
developed by Ross Anderson and Eli Biham, 2005

crc16, crc-16
algorithm:
CRC-16 (ARC)
length:
16 bits
type:
crc:16,8005,0,true,true,0
since:
Jacksum 1.2.0
comment:
this implementation of the CRC-16 (cyclic
redundancy check) is the most popular form
of CRC-16 algorithms
(generator poly x^16 + x^15 + x^2 + 1)
It is used by LHA, and ARC for example.

tree:<algo>
algorithm:
Hash Tree
length:
dependent on the underlying algorithm
type:
hash tree, 1979
since:
Jacksum 1.7.0
comment:
invented by Ralph Merkle, 1979. A hash tree is a
tree of hashes in which the leaves are hashes of
data blocks. By default the tree hash is encoded
base32. Jacksum allows to calculate the root
hash of the hash tree, the following agorithms
are supported with hash trees: tiger, tiger2
Tiger tree hashes are used in P2P file sharing
protocols and applications.

whirlpool0, whirlpool-0
algorithm:
Whirlpool-0 [gnu.crypto.hash.Whirlpool (jonelo)]
length:
512 bits
type:
hash, 2000
since:
Jacksum 1.6.0
comment:
The Whirlpool Hashing Function by Paulo S.L.M.
Barreto and Vincent Rijmen, 2000.
This is the original specification of Whirlpool
from 2000.

whirlpool1, whirlpool-1
algorithm:
Whirlpool-1 [gnu.crypto.hash.Whirlpool]
length:
512 bits
type:
hash, 2001
since:
Jacksum 1.2.0
comment:
The Whirlpool Hashing Function by Paulo S.L.M.
Barreto and Vincent Rijmen, 2001.
This is the first revision of the specification
of Whirlpool from 2001 with improved S-box
design:
"We propose renaming the original algorithm
Whirlpool-0 and using the term Whirlpool for
the final, modified version that uses the
improved S-box design."

whirlpool, whirlpool2, whirlpool-2
algorithm:
Whirlpool [gnu.crypto.hash.Whirlpool (jonelo)]
length:
512 bits
type:
hash, 2003
since:
Jacksum 1.6.0
comment:
The Whirlpool Hashing Function by Paulo S.L.M.
Barreto and Vincent Rijmen.
This is the second revision of the specification
of Whirlpool from 2003 with improved diffusion
matrix:
"Recently [March 11, 2003], Shirai and Shibutani
discovered a flaw in the Whirlpool diffusion
matrix that made its branch number suboptimal.
Although this flaw per se does not seem to
introduce an effective vulnerability, the
present document replaces that matrix
[May 24, 2003]"

xor8, xor-8
algorithm:
Exclusive-Or
length:
8 bits
type:
checksum
since:
Jacksum 1.3.0
comment:
value computed by xoring all values in the
input data stream.
This algorithm doesn't care about the
arrangement of bytes in a file.

crc16_x25, crc-16_x-25, fcs16, fcs-16
algorithm:
CRC-16 (Frame Checking Sequence)
length:
16 bits
type:
crc:16,1021,FFFF,true,true,FFFF
since:
Jacksum 1.5.0 (alias _x25, _x-25 seit 1.7.0)
comment:
The Frame Checking Sequence as defined in
RFC1331.

crc24, crc-24
algorithm:
CRC-24
length:
24 bits
type:
crc:24,864CFB,B704CE,false,false,0
since:
Jacksum 1.6.0
comment:
this implementation of the CRC-24 (cyclic
redundancy check) is used by Open PGP for
example (RFC 2440).

crc32, crc-32, fcs32, fcs-32
algorithm:
CRC-32 [java.util.zip.CRC32]
length:
32 bits
type:
crc:32,04C11DB7,FFFFFFFF,true,true,FFFFFFFF
since:
Jacksum 1.0.0 (alias crc-32 since 1.2.0,
alias fcs32 and fcs-32 since 1.5.0)
comment:
the standard algorithm CRC-32 (cyclic
redundancy check) is specified in ISO 3309,
ISO/IEC 13239:2002 and ITU-T V.42, and it
is used by PKZip, gzip, png, Ethernet, FDDI,
and WEP. That algorithm is also known as FCS
(frame checking sequence)
An alternate implementation is available (-A).
- under BeOS there is no crc32
- under FreeBSD it is /usr/bin/cksum -o 3
- under HP-UX there is no crc32
- under Linux there is no crc32
- under MacOS X it is /usr/bin/cksum -o 3
- under Solaris there is no crc32
- under Windows there is no crc32

crc32_bzip2, crc-32_bzip-2
algorithm:
CRC-32 (Bzip2)
length:
32 bits
type:
crc:32,04C11DB7,FFFFFFFF,false,false,FFFFFFFF
since:
Jacksum 1.7.0
comment:
This CRC is used by bzip2

crc32_mpeg2, crc-32_mpeg-2
algorithm:
CRC-32 (MPEG-2)
length:
32 bits
type:
crc:32,04C11DB7,FFFFFFFF,false,false,0
since:
Jacksum 1.4.0
comment:
this algorithm implements the MPEG
specification of the CRC-32 calculation

The output format of Jacksum:

If you don't specify a customized format with option -F, the following format is
used:

<checksum><sep><filesize><sep>[<timestamp><sep>]<filename>

checksum
is a checksum, CRC or a fingerprint; output depends on options -a and -x, resp. -X

sep is a separator; it can be modified by -s, otherwise it depends on -a and -m

filesize
is the size (bytes or blocks) of a file, it depends on -a, the filesize won't be
written by any MessageDigest-algorithm

timestamp
is an optional timestamp of a file; timestamps can be requested with -t

filename
is a filename, paths can be part of the output, output depends on -p and -P.

EXIT STATUS


0 - everthing is OK
1 - there was at least one mismatch during the verification process
>1 - in case of a parameter-, .jacksum- or I/O-error

EXAMPLES


jacksum -a crc32 -q "txt:Hello World!"

calculates a 32-bit CRC of the text "Hello World!"

jacksum -a crc32 -q 48656C6C6F20576F726C6421

calculates a 32-bit CRC of the hex sequence 48656C6C6F20576F726C6421 which represents
"Hello World!"

jacksum -a crc32 -x *.txt

calculates a 32 bit CRC of all textfiles within the current folder. The checksum
will be printed in a hexadecimal format (-x).

jacksum -a crc32 -f -t default .

not only CRCs will be printed, but also timestamps (-t) of all files within the
current folder (.). The message "is a directory" will be suppressed (-f).

jacksum -f -a crc:16,1021,FFFF,false,false,0 .

a CRC with customized parameters has been used: 16 Bit, Polynomial 1021 (hex, without
the leading bit), initvalue FFFF (hex), mirror neither the input nor the output, no xor.

jacksum -a haval_256_5 .

calculates a 256 bit hash with 5 rounds by using the haval algorithm (haval_256_5) of
all files within the current folder (.).

jacksum -a sha1 -s "\t" -t "EEE, MMM d, yyyy 'at' h:mm a" .

calculates a 160 bit SHA-1 Message-Digest of all files within the current folder. The
separator string (-s) is set to the tabulator char ("\t"). Timestamps of files will be
printed out in a customized format (-t).

jacksum -a cksum -r /mnt/share

calculates a 32 bit CRC with the standard Unix-algorithm cksum of all files
/mnt/share and it's subfolders (-r)

jacksum -a md5 -f -r -m -o list.jacksum /data

calculates the Message-Digest MD5 of all files in /data and it's subfolders (-r),
furthermore it prints metainfo (-m) and stores output to list.jacksum, path information is
stored ABSOLUTELY

jacksum -a md5 -f -r -m -o list.jacksum -w /data

calculates the Message-Digest MD5 of all files in /data and it's subfolders (-r),
furthermore it prints metainfo (-m) and stores output to list.jacksum, path information is
stored RELATIVELY

jacksum -c list.jacksum

verifies all checksums resp. timestamps stored in a file called list.jacksum.
list.jacksum must be generated first with option -m

jacksum -a md5 -f -F "#FINGERPRINT #FILESIZE #FILENAME" *

calculates the Message-Digest MD5 of all files in the current directory. The output
format is customized, it prints also the filesize.

jacksum -a md5 -A -V summary bigfile.iso

Among others it also returns the elapsed time (-V summary) which was necessary to
calculate the MD5 Hash of the file called bigfile.iso by using the alternate MD5
implementation (-A).

jacksum -a crc32 -X -f -p -r -F "#FILENAME #CHECKSUM" -o list.sfv *

prints CRC-32 values in the Simple File Verificator (SFV) format

jacksum -a ed2k -f -F "ed2k://|file|#FILENAME|#FILESIZE|#FINGERPRINT|" *

calculates the edonkey hash of all files in the current directory with a customized
output format

jacksum -a ed2k -f -P / -F "<a href=#QUOTEed2k://|file
|#FILENAME|#FILESIZE|#FINGERPRINT|#QUOTE>#FILENAME</a>" -r .

calculates the edonkey hash of all files in the current directory and it's subfolders
with a customized output format (HTML)

jacksum -a tree:tiger -F "urn:#ALGONAME:#FINGERPRINT" -q hex:

calculates the root hash of the Tree Hash (aka Merkle Hash) with the underlying Tiger
algorithm of an empty input.

jacksum -a sha1+crc32 .

calculates the sha1 hash and the crc32 as a combined checksum

jacksum -a sha1+crc32 -F "#CHECKSUM{0} #CHECKSUM{1} #FILENAME" .

calculates the sha1 hash and the crc32 as separate values

jacksum -a all -F "#ALGONAME{i} (#FILENAME) = #CHECKSUM{i}" .

calculates all supported algorithms on all files in a customized format

jacksum -a all -F "#ALGONAME{i}" -q txt:

prints names of all supported algorithms

jacksum -h synopsis

prints the SYNOPSIS section

jacksum -h haval

prints all sections containing information about haval

jacksum -h -t

prints all information about the timestamp option

jacksum -h en | more

prints the english help (use "de" for german help)

Use jacksum online using onworks.net services


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