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Introduction and installation of crunch, and making password dictionary with crunch
2022-07-01 19:34:00 【51CTO】
One 、Crunch brief introduction
Crunch It's one that runs in linux Dictionary generation tool in , You can customize your own password dictionary file flexibly .
Can a password dictionary do it ？ Know everything. ！
Two 、Crunch install
kali系统 in 默认 install 有Crunch Tools .
Download address ： https://sourceforge.net/projects/crunch-wordlist/
1） Decompress the source package
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# tar zxvf crunch-3.6.tgz
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# cd crunch-3.6/
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# ls
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Get into crunch Under the installation directory of, you can see that there is a charset.lst file , In it, some nouns are defined to abbreviate the characters used to make dictionaries, such as ：
- numeric Express 0123456789
- lalpha Express 26 A lowercase letter
- ualpha Express 26 For capital letters
2） install
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# gcc -Wall -lm -pthread -std=c99 -m64 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 crunch.c -o crunch -lm
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# make install
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3、 ... and 、Crunch Use syntax and parameters
After installation , Start learning how to use Crunch The tool .
grammar
crunch min-len max-len [opention]
Parameters
min-len： The starting minimum length string （ This option is required ）
max-len： The maximum length string that ends （ This option is required ）
charset string To generate the character set contained in the password （ Lowercase characters 、 Uppercase characters 、 Numbers 、 Symbol ）, This option is optional , If you don't write this option , The default character set will be used （ The default is lowercase characters ）. If the password you want to generate contains space characters , You can use instead of , You can put the character set with spaces in double quotation marks “” in , Such as “123abc ”
Options
- -o Output the generated password to the specified file ;
- -z Generated compressed dictionary file , The valid parameters are gzip, bzip2, lzma, and 7z, among gzip The fastest compression ,bzip2 Compression speed ratio gzip Slow single compression efficiency ratio gzip good ,7z The slowest compression , But the compression efficiency is the highest .
- -f Call the password library file , for example ：/usr/share/crunch/charset.lst;
- -t Define password output format （@ For inserting lowercase letters 、, For inserting capital letters 、% For inserting numbers 、^ Represents the caret ）
- -b： Divide the dictionary file into several dictionaries of specified size according to the specified size unit , Avoid a dictionary file that is too large ,
Example ： Press each file 20mib Split dictionary file
explain ：
The unit has kb, mb, gb, kib, mib, gib , The first three units are based on 1000 Calculated in units , The last three are 1024 Calculated .
Note that there is no space between numbers and units , for example ：500mb That's right. , 500 mb The format is wrong （ There's a space in the middle ）,-b The parameters must be the same as -o START Use a combination of
- -c Specify the number of lines to write to the dictionary file , Only in -o START Parameter , If a single dictionary exceeds the specified number of lines, it will be divided into two or more dictionary files . for example ： -c 5000
- -d Limit the number of consecutive occurrences of the same character , -d 2 It means that one character is limited to appear continuously at most 2 It's like aabd,ccda.aaab It means more than 2 Consecutive characters limit .
- -e Define that string and stop generating passwords , for example ： -e 999999 It means that the password is generated to 99999 Stop generating passwords when
- -i Change the output format , for example ： The original input is aaa,aab,aac,aad Use it again -i after , Will become aaa,baa,caa,daa The format of
- -p Define password elements
- -q Read password elements
- -r The definition starts over somewhere
- -s The first password , From the password defined by yourself xxx Start
- -u： Ban printpercentage Threads . This should be the last choice
Four 、 Use cases
- Generate a 8 Bits contain upper and lower case letters 、 Numbers 、 A dictionary of common characters , And export to a file
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# crunch 8 8 -f /root/crunch-3.6/charset.lst mixalpha-numeric-all-space -o mima-8wei.txt
transport
Out
junction
fruit
：
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Data volume 54303TB, The file is too large .
2、 Generate 10 Bit code , The format is “ Three lowercase letters + A symbol + Four Numbers + Two symbols ”, Limit the maximum number of consecutive occurrences of each lowercase letter 2 Time , Numbers appear continuously at most 3 Time
3、 Generate 8 Bit code , Each lowercase letter can appear up to two consecutive
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