georgelviv

# Based on https://github.com/pimoroni/st7735-python/blob/main/st7735/__init__.py
import numbers
import time

from gpiozero import OutputDevice
import numpy as np
import spidev

ST7735_NOP = 0x00
ST7735_SWRESET = 0x01

DavidBuchanan314

MD5 Collision with CRC32 Preimage

Here's the scenario: We want to craft two different messages with the same MD5 hash, and a specific CRC32 checksum, simultaneously.

In other words, we want an MD5 collision attack and a CRC32 preimage attack.

This might seem like a contrived scenario, but it's exactly the one I faced while producing my PNG hashquine (Yes OK maybe that's also a contrived scenario, cut me some slack).

On its own, a CRC32 preimage attack is trivial. You can craft a 4-byte suffix that gives any message a specific checksum, calculated using a closed-form expression (which I am too lazy to derive, not even with assistance from Z3). It's not an attack per-se, since CRC32 was never meant to be cryptograpically secure in the first place.

sekcompsci

Comparison chips (SoCs) table for ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6

A minimal table to compare the Espressif's MCU families.

	ESP8266	ESP32	ESP32-S2	ESP32-S3	ESP32-C3	ESP32-C6
Announcement Date	2014, August	2016, September	2019, September	2020, December

mvaisakh

A small Device Tree Bringup Guide

Introduction

So, you guys might be wondering, how do these "Developers" get your favourite Custom roms, such as LineageOS, Paranoid Android etc., to their own devices. Well I'm here to Guide you on how to do it, specifically on how to bringup or make your own device tree from scratch or adapting.

Gist of this Guide: This is for people with genuine interest in Android OS porting/development. After going through this guide, you should be able to do a total device tree bringup on your own.

Prerequisite: Certain requirements are to be met before you start with this amazing journey.

shaposhnikoff

Data type,Name,Channel Type,Rx Frequency,Tx Frequency,Color Code,Timeslot,Contact,Contact Type, Contact Id,Rx Group,Scanlist,Zone,RX CTCSS,TX CTCSS,Power,Bandwidth,Rx Only,Squelch,Tx Admit,TOT,TOT Rekey,Tx Signaling,Rx Signaling,Privacy Group,Emergency System,Flags1,Flags2,Flags3,Flags4,RssiThreshold,VoiceEmphasis,TxSignaling,UnmuteRule,RxSignaling
CH_DATA,PMR01,Analog,446.00625,446.00625,1,2,N/A,0,N/A,GroupList1,SCAN V,None,None,None,1W,12.5,No,Master,0,0,3,0,0,1,1,0,64,0,129,-80,0,0,0,0,22
CH_DATA,PMR02,Analog,446.01875,446.01875,1,2,N/A,0,N/A,GroupList1,SCAN V,None,None,None,1W,12.5,No,Master,0,0,3,0,0,1,1,0,64,0,129,-80,0,0,0,0,22
CH_DATA,PMR03,Analog,446.03125,446.03125,1,2,N/A,0,N/A,GroupList1,SCAN V,None,None,None,1W,12.5,No,Master,0,0,3,0,0,1,1,0,64,0,129,-80,0,0,0,0,22
CH_DATA,PMR04,Analog,446.04375,446.04375,1,2,N/A,0,N/A,GroupList1,SCAN V,None,None,None,1W,12.5,No,Master,0,0,3,0,0,1,1,0,64,0,129,-80,0,0,0,0,22
CH_DATA,PMR05,Analog,446.05625,446.05625,1,2,N/A,0,N/A,GroupList1,SCAN V,None,None,None,1

MrHallows

Command:

$ fastboot help

Output:

usage: fastboot [OPTION...] COMMAND...

flashing:

vyach-vasiliev

This instruction is about how to get a 3D model out of a PDF file.

We need:

• Python version not lower than 2.7
• Any version OS (Windows, Linux, Mac)

Extract

Download the Pythong PDF Parser: https://blog.didierstevens.com/programs/pdf-tools/

1. Search for the 3D object:

johnfedoruk

ClamAV Setup Notes

Context

ClamAV can be used in a few different ways. Most importantly, it provides the ability to scan files in realtime (on-access) or to scan the file system periodically.

I tried configuring ClamAV to both perform on-access virus scanning and to perform nightly full filesystem scanning. Using the on-access option did not prove to be very useful, however a scheduled full system scan seems to be of value.

Here is my story.

GautamBose

Enable modules in Kernel

In raspi-config

Enable SPI under "Interfacing options"

Add modules

$ sudo nano /etc/modules

nstarke

#!/bin/sh

#
# A Small Shell script to check a binary for different microcontroller cpu architectures.
#
# This works by importing the binary into a project in Ghidra
# And then iteratively attempting to analyze chunks of the binary firmare
# all while timing the analysis.
#
# The theory is Ghidra should take noticeably longer to analyze a valid