Sha1collisiondetection

Jul 20, 2023

Library and command line tool to detect SHA-1 collisions

This library and command line tool were designed as near drop-in replacements for common SHA-1 libraries and sha1sum. They will compute the SHA-1 hash of any given file and additionally will detect cryptanalytic collision attacks against SHA-1 present in each file. It is very fast and takes less than twice the amount of time as regular SHA-1.

There are two programs sha1dcsum and sha1dcsum_partialcoll. The first program, sha1dcsum, will detect and warn for files that were generated with a cryptanalytic SHA-1 collision attack like the one documented at https//shattered.io/. The second program, sha1dcsum_partialcoll, will detect and warn for files that were generated with a cryptanalytic collision attack against reduced- round SHA-1 of which there are a few examples so far.



Checkout these related ports:
  • Zzuf - Transparent application input fuzzer
  • Zlint - X.509 certificate linter
  • Zeronet - Decentralized websites using Bitcoin crypto and BitTorrent network
  • Zenmap - GUI frontend for the Nmap scanning utility
  • Zeek - System for detecting network intruders in real-time
  • Zaproxy - The OWASP zed attack proxy
  • Yubioath-desktop - GUI for displaying OATH codes with a Yubikey
  • Yubikey-personalization-gui - Graphical YubiKey personalization tool
  • Yubikey-manager-qt - Cross-platform application for configuring any YubiKey
  • Yubikey-agent - Seamless ssh-agent for YubiKeys
  • Yubico-piv-tool - Yubico PIV tool
  • Ylva - Command line password manager and file encryption program
  • Ykpers - Library and tool for personalization of Yubico's YubiKey
  • Ykclient - Yubico C client library
  • Yersinia - Layer 2 vulnerability scanner (switches, spanning tree, 802.1q ...)