Wellington M. Espindula WellingtonEspindula

M2 Cybersecurity at ENSIMAG

WellingtonEspindula / find_next_word.sh

Last active April 24, 2024 22:36

Grep to select the word right after the searched word

grep --color -P '(?<=$SEARCHED_WORD\=)(\s+)?\K([^ ]*)

WellingtonEspindula / .bashrc

Last active April 25, 2024 11:14

Comma-based CSV file reader for .bashrc

	# Bash utility aliases/functions to read huge CSV files
	# The both functions read the first n lines from a file

	# Normal version (open the columnized file in less)
	readcsv() {
	local lines=$1 \
	filename=$2
	head -n "$lines" "$filename" \| column -tns ',' \| less -S
	}

WellingtonEspindula / rotate.py

Created November 9, 2023 21:08

Rotate x times chars (using unsigned char) in a byte string (useful to desobfuscate secrets in C code)

	def rotate(byte_string, x_times):
	return "".join( [ chr( (byte + x_times) % 256) for byte in memoryview(byte_string).tolist()])

	# exemple
	rotate(b'\x74\x66\x75\x66\x64\x62\x74\x75\x73\x70\x6f\x70\x6e\x7a\x00', 0xff)