0xTowel

## bsgs.py
#!/usr/bin/env python3
# -*- coding:utf-8 -*-
# Towel 2017

from math import ceil, sqrt


def bsgs(g, h, p):
    '''
    Solve for x in h = g^x mod p given a prime p.

## SeeSP.c
/* SeeSP: Print the value of the stack pointer.
 * Build: gcc SeeSP.c -o SeeSP
 *
 * Towel - 2017
 */
#include <stdio.h>
#include <inttypes.h>

int main(void)
{

## naslr.c
/* Naslr: Starts a bash shell with no ASLR
 * Build: gcc naslr.c -o naslr
 *
 * Towel - 2017
 */
#include <sys/personality.h>
#include <syscall.h>
#include <unistd.h>
#include <stdlib.h>
#include <err.h>

## Mateware License
/*
 * ------------------------------------------------------------
 * "THE MATEWARE LICENSE" (Revision 1):
 * <author> wrote this code. As long as you retain this notice,
 * you can do whatever you want with this code. If you meet
 * <author> someday, and you think this code is worth it,
 * you can buy <author> a mate in return.
 * ------------------------------------------------------------
*/

## .vimrc
" My bare-minimum, portable vimrc
inoremap <special> jk <ESC>
inoremap <special> kj <ESC>

set clipboard^=unnamedplus
set relativenumber
set number
set backspace=eol,start,indent
set whichwrap+=<,>,h,l
set ignorecase

## shell_32.asm
BITS 32
global _start
section .text

SYS_EXECVE equ 0x0b

_start:
    xor ecx, ecx       ; argv to zero
    mul ecx            ; envp to zero, eax to zero
    add al, SYS_EXECVE ; syscall 11 for execve

## whitespace_bytes.md

      
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                0xTowel
                / whitespace_bytes.md
            
            
              Last active
              February 22, 2019 03:25
            
              
                A list of bytes which are considered whitespace in C and POSIX locales and terminate calls such as scanf("%s")
              
          
    The following bytes are considered whitespace in C and POSIX locales:

0c0a0d090b20
They will end input to functions such as scanf("%s").


Byte
Escape Sequence
Name


0c
\f
form-feed


0a
\n
newline


## biggars_fireshell2019.sage
#!/usr/bin/env sage
# -*- coding: utf-8 -*-
# Towel 2019

"""
Solution to 'Biggars' challenge from FireShell CTF 2019.
A multi-prime RSA computation with large N requiring CRT
to compute d rather than normal fast-power algorithm.
"""

## .gef.rc
[context]
clear_screen = True
layout = regs code stack memory args extra
show_registers_raw = False
nb_lines_stack = 6

## rsrcdump.py
#!/usr/bin/env python3
"""A small example utility to demonstrate r2pipe scripting
by extracting resources from a file.

Written as an example for someone on IRC.

--Towel, 2019
"""

import r2pipe
	#!/usr/bin/env python3
	# -- coding:utf-8 --
	# Towel 2017

	from math import ceil, sqrt


	def bsgs(g, h, p):
	'''
	Solve for x in h = g^x mod p given a prime p.
	/* SeeSP: Print the value of the stack pointer.
	* Build: gcc SeeSP.c -o SeeSP
	*
	* Towel - 2017
	*/
	#include <stdio.h>
	#include <inttypes.h>

	int main(void)
	{
	/* Naslr: Starts a bash shell with no ASLR
	* Build: gcc naslr.c -o naslr
	*
	* Towel - 2017
	*/
	#include <sys/personality.h>
	#include <syscall.h>
	#include <unistd.h>
	#include <stdlib.h>
	#include <err.h>
	/*
	* ------------------------------------------------------------
	* "THE MATEWARE LICENSE" (Revision 1):
	* <author> wrote this code. As long as you retain this notice,
	* you can do whatever you want with this code. If you meet
	* <author> someday, and you think this code is worth it,
	* you can buy <author> a mate in return.
	* ------------------------------------------------------------
	*/
	" My bare-minimum, portable vimrc
	inoremap <special> jk <ESC>
	inoremap <special> kj <ESC>

	set clipboard^=unnamedplus
	set relativenumber
	set number
	set backspace=eol,start,indent
	set whichwrap+=<,>,h,l
	set ignorecase
	BITS 32
	global _start
	section .text

	SYS_EXECVE equ 0x0b

	_start:
	xor ecx, ecx ; argv to zero
	mul ecx ; envp to zero, eax to zero
	add al, SYS_EXECVE ; syscall 11 for execve
	#!/usr/bin/env sage
	# -- coding: utf-8 --
	# Towel 2019

	"""
	Solution to 'Biggars' challenge from FireShell CTF 2019.
	A multi-prime RSA computation with large N requiring CRT
	to compute d rather than normal fast-power algorithm.
	"""
	[context]
	clear_screen = True
	layout = regs code stack memory args extra
	show_registers_raw = False
	nb_lines_stack = 6
	#!/usr/bin/env python3
	"""A small example utility to demonstrate r2pipe scripting
	by extracting resources from a file.

	Written as an example for someone on IRC.

	--Towel, 2019
	"""

	import r2pipe