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Think twice before abandoning Xorg. Wayland breaks everything!

Hence, if you are interested in existing applications to "just work" without the need for adjustments, then you may be better off avoiding Wayland.

Wayland solves no issues I have but breaks almost everything I need. Even the most basic, most simple things (like xkill) - in this case with no obvious replacement. And usually it stays broken, because the Wayland folks mostly seem to care about Automotive, Gnome, maybe KDE - and alienating everyone else (e.g., people using just an X11 window manager or something like GNUstep) in the process.

Update 06/2025: X11 is alive and well, despite what Red Hat wants you to believe. https://github.com/X11Libre/xserver revitalizes the Xorg X11 server as a community project under new leadership.

PicoCTF 2017: ECC2

A 1064CBread Writeup

Problem

In the file handout.txt, we are given the following parameters for an elliptic curve:

y^2 = x^3 + A*x + B mod M -- the curve equation
M -- the modulus of the curve

Extracting Existing Kernel + Ramfs

Enter the machine using adb shell

Run cat /proc/partitions

  #  Path                     Purpose        Size
  0 /dev/block/mmcblk0                       7761920
  1 /dev/block/mmcblk0p1      data           6085631

Last Updated: March 2023

IMPORTANT: Ignore the out-of-date steps below for getting Chromium keys.

Instead, read this up-to-date guide (Jan 2023) written by @LearningToPi.

P.S. Thank you to every contributor below who provided tips over the years on what should be a straightforward process: setting up Chromium for local development.

Long live the web!

	assert(b,s)=if(!(b), error(Str(s)));

	m=eval(getenv("m"));
	b=m.mod;
	c=lift(m);

	if(ispseudoprime(c),s=sqrt(Mod(-b,c)),issquare(Mod(b,-c),&s));
	V=r=lift(s);;
	print("V=",r);

	pragma solidity ^0.5.8;

	contract MiMC {
	uint constant FIELD_SIZE = 21888242871839275222246405745257275088548364400416034343698204186575808495617;

	function MiMCSponge(uint256 xL, uint256 xR) public pure returns (uint256, uint256) {
	uint exp;
	uint t;
	uint xR_tmp;
	t = xL;

	user@ubuntu:/dev/shm$ ~/fio/fio --loops=5 --size=1g --runtime=10 --stonewall --direct=0 --group_reporting \
	--name=SeqQ32T1read --bs=128k --iodepth=32 --rw=read \
	--name=SeqQ32T1write --bs=128k --iodepth=32 --rw=write \
	--name=4kQ8T8read --bs=4k --iodepth=8 --numjobs=8 --rw=randread \
	--name=4kQ8T8write --bs=4k --iodepth=8 --numjobs=8 --rw=randwrite \
	--name=4kQ32T1read --bs=4k --iodepth=32 --rw=randread \
	--name=4kQ32T1write --bs=4k --iodepth=32 --rw=randwrite \
	--name=4kQ1T1read --bs=4k --iodepth=1 --rw=randread \
	--name=4kQ1T1write --bs=4k --iodepth=1 --rw=randwrite
	SeqQ32T1read: (g=0): rw=read, bs=(R) 128KiB-128KiB, (W) 128KiB-128KiB, (T) 128KiB-128KiB, ioengine=psync, iodepth=32

	>>> from pybtc import *
	>>>
	>>> # first step we need create 2 of 3 multisig output and add same btc
	>>>
	>>> a1 = Address("cPBuqn4ZsddXunx6EEev6khbfUzFnh3xxdEUPCrm5uy9qGcmbBEt",
	address_type="P2PKH", testnet=True)
	>>> a2 = Address("cVgShyj2q4YKFX8VzCffuQcrJVYhp522NFozNi7ih2KgNVbnysKX",
	address_type="P2PKH", testnet=True)
	>>> a3 = Address("cQWBhFENcN8bKEBsUHvpCyCfWVHDLfn1M65Gd6nenQkpEqL4DNUH",
	address_type="P2PKH", testnet=True)