Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
CRUNCH(1)		    General Commands Manual		     CRUNCH(1)

NAME
       crunch -	generate wordlists from	a character set

SYNOPSIS
       crunch <min-len>	<max-len> [<charset string>] [options]

DESCRIPTION
       Crunch can create a wordlist based on criteria you specify.  The	outout
       from crunch can be sent to the screen, file,  or	 to  another  program.
       The required parameters are:

       min-len
	      The minimum length string	you want crunch	to start at.  This op-
	      tion is required even for	parameters that	won't use the value.

       max-len
	      The maximum length string	you want crunch	to end at.   This  op-
	      tion is required even for	parameters that	won't use the value.

       charset string
	      You  may specify character sets for crunch to use	on the command
	      line or if you leave it blank crunch will	use the	default	 char-
	      acter sets.  The order MUST BE lower case	characters, upper case
	      characters, numbers, and then symbols.  If you don't follow this
	      order  you  will not get the results you want.  You MUST specify
	      either values for	the character type or a	plus sign.   NOTE:  If
	      you  want	 to  include the space character in your character set
	      you must escape it using the \ character or enclose your charac-
	      ter  set in quotes i.e. "abc ".  See the examples	3, 11, 12, and
	      13 for examples.

OPTIONS
       -b number[type]
	      Specifies	the size of the	output file, only works	if -o START is
	      used,  i.e.:  60MB   The	output	files will be in the format of
	      starting letter-ending letter for	example: ./crunch 4 5 -b 20mib
	      -o START will generate 4 files: aaaa-gvfed.txt, gvfee-ombqy.txt,
	      ombqz-wcydt.txt, wcydu-zzzzz.txt valid values for	type  are  kb,
	      mb,  gb,	kib, mib, and gib.  The	first three types are based on
	      1000 while the last three	types are based	on 1024.   NOTE	 There
	      is  no  space between the	number and type.  For example 500mb is
	      correct 500 mb is	NOT correct.

       -c number
	      Specifies	the number of lines to	write  to  output  file,  only
	      works if -o START	is used, i.e.: 60  The output files will be in
	      the  format  of  starting	 letter-ending	letter	for   example:
	      ./crunch	1  1 -f	/pentest/password/crunch/charset.lst mixalpha-
	      numeric-all-space	-o START -c 60 will result in 2	files: a-7.txt
	      and  8-\	.txt  The reason for the slash in  the second filename
	      is the ending character is space and ls  has  to	escape	it  to
	      print it.	 Yes you will need to put in the \ when	specifying the
	      filename because the last	character is a space.

       -d numbersymbol
	      Limits the number	of duplicate characters.   -d  2@  limits  the
	      lower  case  alphabet to output like aab and aac.	 aaa would not
	      be generated as that is 3	consecutive letters of a.  The	format
	      is number	then symbol where number is the	maximum	number of con-
	      secutive characters and symbol is	the symbol of the the  charac-
	      ter set you want to limit	i.e. @,%^   See	examples 17-19.

       -e string
	      Specifies	when crunch should stop	early

       -f /path/to/charset.lst charset-name
	      Specifies	a character set	from the charset.lst

       -i  Inverts  the	 output	 so  instead  of  aaa,aab,aac,aad, etc you get
	      aaa,baa,caa,daa,aba,bba, etc

       -l When you use the -t option this option tells	crunch	which  symbols
	      should  be  treated as literals.	This will allow	you to use the
	      placeholders as letters in the pattern.  The -l option should be
	      the same length as the -t	option.	 See example 15.

       -m Merged with -p.  Please use -p instead.

       -o wordlist.txt
	      Specifies	the file to write the output to, eg: wordlist.txt

       -p charset OR -p	word1 word2 ...
	      Tells crunch to generate words that don't	have repeating charac-
	      ters.  By	default	 crunch	 will  generate	 a  wordlist  size  of
	      #of_chars_in_charset  ^  max_length.   This  option will instead
	      generate #of_chars_in_charset!.  The  !  stands  for  factorial.
	      For example say the charset is abc and max length	is 4..	Crunch
	      will by default generate 3^4 = 81	words.	This option  will  in-
	      stead  generate  3!  = 3x2x1 = 6 words (abc, acb,	bac, bca, cab,
	      cba).  THIS MUST BE THE LAST OPTION!  This option	CANNOT be used
	      with -s and it ignores min and max length	however	you must still
	      specify two numbers.

       -q filename.txt
	      Tells crunch to read filename.txt	 and  permute  what  is	 read.
	      This  is	like the -p option except it gets the input from file-
	      name.txt.

       -r Tells	crunch to resume generate words	from where it  left  off.   -r
	      only  works if you use -o.  You must use the same	command	as the
	      original command used to generate	the words.  The	only exception
	      to  this is the -s option.  If your original command used	the -s
	      option you MUST remove it	before you resume the  session.	  Just
	      add -r to	the end	of the original	command.

       -s startblock
	      Specifies	a starting string, eg: 03god22fs

       -t @,%^
	      Specifies	 a pattern, eg:	@@god@@@@ where	the only the @'s, ,'s,
	      %'s, and ^'s will	change.
	      @	will insert lower case characters
	      ,	will insert upper case characters
	      %	will insert numbers
	      ^	will insert symbols

       -u
	      The -u option disables the printpercentage thread.  This	should
	      be the last option.

       -z gzip,	bzip2, lzma, and 7z
	      Compresses  the output from the -o option.  Valid	parameters are
	      gzip, bzip2, lzma, and 7z.
	      gzip is the fastest but the compression is minimal.  bzip2 is  a
	      little slower than gzip but has better compression.  7z is slow-
	      est but has the best compression.

EXAMPLES
       Example 1
       crunch 1	8
       crunch will display a wordlist that starts at a and ends	at zzzzzzzz

       Example 2
       crunch 1	6 abcdefg
       crunch will display a wordlist using the	 character  set	 abcdefg  that
       starts at a and ends at gggggg

       Example 3
       crunch 1	6 abcdefg\
       there  is  a  space  at	the end	of the character string.  In order for
       crunch to use the space you will	need to	escape it using	the \  charac-
       ter.   In this example you could	also put quotes	around the letters and
       not need	the \, i.e. "abcdefg ".	 Crunch	will display a wordlist	 using
       the character set abcdefg  that starts at a and ends at (6 spaces)

       Example 4
       crunch 1	8 -f charset.lst mixalpha-numeric-all-space -o wordlist.txt
       crunch  will  use  the  mixalpha-numeric-all-space  character  set from
       charset.lst and will write the wordlist to a file  named	 wordlist.txt.
       The file	will start with	a and end with "	"

       Example 5
       crunch 8	8 -f charset.lst mixalpha-numeric-all-space -o wordlist.txt -t
       @@dog@@@	-s cbdogaaa
       crunch should generate a	8 character wordlist using  the	 mixalpha-num-
       ber-all-space  character	 set  from  charset.lst	 and  will  write  the
       wordlist	to a file named	wordlist.txt.  The file	will start at cbdogaaa
       and end at "  dog   "

       Example 6
       crunch 2	3 -f charset.lst ualpha	-s BB
       crunch  with  start generating a	wordlist at BB and end with ZZZ.  This
       is useful if you	have to	stop generating	 a  wordlist  in  the  middle.
       Just  do	 a tail	wordlist.txt and set the -s parameter to the next word
       in the sequence.	 Be sure to rename the original	 wordlist  BEFORE  you
       begin as	crunch will overwrite the existing wordlist.

       Example 7
       crunch 4	5 -p abc
       The numbers aren't processed but	are needed.
       crunch will generate abc, acb, bac, bca,	cab, cba.

       Example 8
       crunch 4	5 -p dog cat bird
       The numbers aren't processed but	are needed.
       crunch  will  generate  birdcatdog, birddogcat, catbirddog, catdogbird,
       dogbirdcat, dogcatbird.

       Example 9
       crunch 1	5 -o START -c 6000 -z bzip2
       crunch will generate bzip2 compressed files with	each  file  containing
       6000  words.  The filenames of the compressed files will	be first_word-
       last_word.txt.bz2

       # time ./crunch 1 4 -o START -c 6000 -z gzip
       real    0m2.729s
       user    0m2.216s
       sys     0m0.360s

       # time ./crunch 1 4 -o START -c 6000 -z bzip2
       real    0m3.414s
       user    0m2.620s
       sys     0m0.580s

       # time ./crunch 1 4 -o START -c 6000 -z lzma
       real    0m43.060s
       user    0m9.965s
       sys     0m32.634s

       size  filename
       30K   aaaa-aiwt.txt
       12K   aaaa-aiwt.txt.gz
       3.8K  aaaa-aiwt.txt.bz2
       1.1K  aaaa-aiwt.txt.lzma

       Example 10
       crunch 4	5 -b 20mib -o START
       will  generate  4  files:   aaaa-gvfed.txt,   gvfee-ombqy.txt,	ombqz-
       wcydt.txt, wcydu-zzzzz.txt
       the  first  three  files	 are 20MBs (real power of 2 MegaBytes) and the
       last file is 11MB.

       Example 11
       crunch 3	3 abc +	123 !@#	-t @%^
       will generate a 3 character long	word with a  character	as  the	 first
       character,  and	number	as  the	second character, and a	symbol for the
       third character.	 The order in which you	 specify  the  characters  you
       want is important.  You must specify the	order as lower case character,
       upper case character, number, and symbol.  If you aren't	going to use a
       particular  character set you use a plus	sign as	a placeholder.	As you
       can see I am not	using the upper	case character set so I	am  using  the
       plus sign placeholder.  The above will start at a1! and end at c3#

       Example 12
       crunch 3	3 abc +	123 !@#	-t ^%@
       will generate 3 character words starting	with !1a and ending with #3c

       Example 13
       crunch 4	4  + + 123 + -t	%%@^
       the  plus sign (+) is a place holder so you can specify a character set
       for the character type.	crunch will use	the default character set  for
       the  character  type when crunch	encounters a + (plus sign) on the com-
       mand line.  You must either specify values for each character  type  or
       use  the	plus sign.  I.E. if you	have two characters types you MUST ei-
       ther specify values for each type or use	a plus sign.  So in this exam-
       ple the character sets will be:
       abcdefghijklmnopqrstuvwxyz
       ABCDEFGHIJKLMNOPQRSTUVWXYZ
       123
       !@#$%^&*()-_+=~`[]{}|\:;"'<>,.?/
       there is	a space	at the end of the above	string
       the  output  will start at 11a! and end at "33z ".  The quotes show the
       space at	the end	of the string.

       Example 14
       crunch 5	5 -t ddd@@ -o j	-p dog cat bird
       any character other than	one of the following: @,%^
       is the placeholder for the words	to permute.  The @,%^ symbols have the
       same function as	-t.
       If  you	want  to  use @,%^ in your output you can use the -l option to
       specify which character you want	crunch to treat	as a literal.
       So the results are
       birdcatdogaa
       birdcatdogab
       birdcatdogac
       <skipped>
       dogcatbirdzy
       dogcatbirdzz

       Example 15
       crunch 7	7 -t p@ss,%^ -l	a@aaaaa
       crunch will now treat the @ symbol as a literal character and  not  re-
       place the character with	a uppercase letter.
       this will generate
       p@ssA0!
       p@ssA0@
       p@ssA0#
       p@ssA0$
       <skipped>
       p@ssZ9

       Example 16
       crunch 5	5 -s @4#S2 -t @%^,2 -e @8 Q2 -l	@dddd -b 10KB -o START
       crunch will generate 5 character	strings	starting with @4#S2 and	ending
       at @8 Q2.  The output will be broken into 10KB sized  files  named  for
       the files starting and ending strings.

       Example 17
       crunch 5	5 -d 2@	-t @@@%%
       crunch  will generate 5 character strings staring with aab00 and	ending
       at zzy99.  Notice that aaa and zzz are not present.

       Example 18
       crunch 10 10 -t @@@^%%%%^^ -d 2@	-d 3% -b 20mb -o START
       crunch will generate 10 character strings starting with aab!0001!!  and
       ending at zzy 9998    The output	will be	written	to 20mb	files.

       Example 19
       crunch 8	8 -d 2@
       crunch  will gernerate 8	characters that	limit the same number of lower
       case characters to 2.   Crunch  will  start  at	aabaabaa  and  end  at
       zzyzzyzz.

       Example 20
       crunch 4	4 -f unicode_test.lst japanese -t @@%% -l @xdd
       crunch will load	some japanese characters from the unicode_test charac-
       ter set file.  The output will start at @aeY00 and end at @ea99.

REDIRECTION
       You can use crunch's output and pipe it into other programs.   The  two
       most popular programs to	pipe crunch into are: aircrack-ng and airolib-
       ng.  The	syntax is as follows:
       crunch 2	4 abcdefghijklmnopqrstuvwxyz | aircrack-ng /root/Mycapfile.cap
       -e MyESSID -w-
       crunch 10 10 12345 --stdout | airolib-ng	testdb -import passwd -

NOTES
       1.  Starting  in	version	2.6 crunch will	display	how much data is about
       to be generated.	 In 2.7	it will	also display how many  lines  will  be
       generated.   Crunch will	now wait 3 seconds BEFORE it begins generating
       data to give you	time to	press Ctrl-C to	abort crunch if	you  find  the
       values are too large for	your application.

       2.   I	have   added   hex-lower   (0123456789abcdef)	and  hex-upper
       (0123456789ABCDEF) to charset.lst.

       3. Several people have requested	that I add support for the space char-
       acter  to  crunch.   crunch has always supported	the space character on
       the command line	and in the charset.lst.	 To add	a space	on the command
       line  you  must escape it using the / character.	 See example 3 for the
       syntax.	You may	need to	escape other characters	like ! or #  depending
       on your operating system.

       4.  Starting  in	2.7 if you are generating a file then every 10 seconds
       you will	receive	the % done.

       5. Starting in 3.0 I had	to change the -t * character to	a , as	the  *
       is  a  reserved	character.   You  could	still use it if	you put	a \ in
       front of	the *.	Yes it breaks crunch's syntax and  I  do  my  best  to
       avoid  doing that, but in this instance it is easier to make the	change
       for long	term support.

       6. Some output is missing.  A file didn't get generated.
       The mostly explaination is you ran out of disk space.  If you have ver-
       ified you have plenty of	disk space then	the problem is most likely the
       filename	begins with a period.  In Linux	filenames that	begin  with  a
       period are hidden.  To view them	do a ls	-l .*

       7.  Crunch  says	The maximum and	minimum	length should be the same size
       as the pattern you specified, however the length	is set correctly.
       This usually means your pattern contains	a character that needs	to  be
       escaped.	 In bash you need to escape the	followings: &, *, space, \, (,
       ), |, ',	", ;, <, >.
       The escape character in bash is a \.  So	a pattern that has a & and a *
       in it would look	like this:
       crunch 4	4 -t \&\*d@
       An  alternative	to  escaping  characters  is  to wrap your string with
       quotes.	For example:
       crunch 4	4 -t "&*d@"
       If you want to use the "	in your	pattern	you will  need	to  escape  it
       like this: crunch 4 4 -t	"&*\"@"
       Please  note  that different terminals have different escape characters
       and probably have different characters that will	need escaping.	Please
       check  the manpage of your terminal for the escape characters and char-
       acters that need	escaping.

       8. When using the -z 7z option, 7z does not delete the  original	 file.
       You will	have to	delete those files by hand.

AUTHOR
       This manual page	was written by bofh28@gmail.com

       Crunch version 1.0 was written by mimayin@aciiid.ath.cx
       all later versions of crunch have been updated by bofh28@gmail.com

FILES
       None.

BUGS
       If  you	find  any  please  email  bofh28 <bofh28@gmail.com> or post to
       http://www.backtrack-linux.org

COPYRIGHT
       Copyright (c) 2009-2013 bofh28 <bofh28@gmail.com>

       This file is a part of Crunch.

       Crunch is free software:	you can	redistribute it	and/or modify it under
       the  terms  of  the GNU General Public License as published by the Free
       Software	Foundation, version 2 only of the License.

       Crunch is distributed in	the hope that it will be useful,  but  WITHOUT
       ANY  WARRANTY;  without even the	implied	warranty of MERCHANTABILITY or
       FITNESS FOR A PARTICULAR	PURPOSE.  See the GNU General  Public  License
       for more	details.

       You should have received	a copy of the GNU General Public License along
       with Crunch.  If	not, see <http://www.gnu.org/licenses/>.

Version	3.6			   May 2014			     CRUNCH(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | REDIRECTION | NOTES | AUTHOR | FILES | BUGS | COPYRIGHT

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=crunch&sektion=1&manpath=FreeBSD+12.2-RELEASE+and+Ports>

home | help