BFShift

A super simple encode/decode/bruteforce script for shift ciphers by @AleDiBen & @Omnicrist.

Description

This Python 3 script to encode/decode/bruteforce arbitrary strings using a shift cipher (i.e. Caesar Cipher, ROT-13, etc.).

Features / TO-DO

The following features are supported

• Encode/Decode a message
• Perform a Bruteforce attack using different alphabets and/or shift amounts
• Specify your own custom alphabet
• Specify a flag format in order to filter results
• Run the script in Debug Mode
• Multi-threading? May be useless

Supported Alphabets

Code	Alphabet
0	[SPACE]!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
1	0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
2	ABCDEFGHIJKLMNOPQRSTUVWXYZ
3	abcdefghijklmnopqrstuvwxyz
4	abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
5	ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
6	0123456789abcdefABCDEF

Supported Shifts

From 1 to chosen alphabet lenght minus one.

Examples

Linux Version: encoding and decoding a message

user@kali:~$ python3 bfshift.py -m this_is_a_message
"uv!lv!lnlzr!!ntr

user@kali:~$ python3 bfshift.py -d -m '"uv!lv!lnlzr!!ntr'
this is a message

user@kali:~$ python3 bfshift.py -a 3 --bf-shift -m 'ozhshi{Aopz_pz_h_tlzzhnl}'
nygrgh{znoy_oy_g_skyygmk}
mxfqfg{ymnx_nx_f_rjxxflj}
lwepef{xlmw_mw_e_qiwweki}
...
rCkvkl{DrsC_sC_k_woCCkqo}
qBjujk{CqrB_rB_j_vnBBjpn}
pAitij{BpqA_qA_i_umAAiom}

user@kali:~$ python3 bfshift.py --bf-alphabets -s 7 --flag-format 'hsalab{' -m 'ozhshi{Aopz_pz_h_tlzzhnl}'
hsalab{this_is_a_message}
hsalab{this_is_a_message}
hsalab{this_is_a_message}

Windows Version (cmd.exe): encoding and decoding a message

C:\> python.exe bfshift.py -m this_is_a_message
"uv!lv!lnlzr!!ntr

C:\> python.exe bfshift.py -a 3 --bf-shift -m "ozhshi{Aopz_pz_h_tlzzhnl}"
nygrgh{znoy_oy_g_skyygmk}
mxfqfg{ymnx_nx_f_rjxxflj}
lwepef{xlmw_mw_e_qiwweki}
...
rCkvkl{DrsC_sC_k_woCCkqo}
qBjujk{CqrB_rB_j_vnBBjpn}
pAitij{BpqA_qA_i_umAAiom}

C:\> python.exe bfshift.py --bf-alphabets -s 7 --flag-format "hsalab{" -m "ozhshi{Aopz_pz_h_tlzzhnl}"
hsalab{this_is_a_message}
hsalab{this_is_a_message}
hsalab{this_is_a_message}

...may the security be with you...