hash-length-extension

The length-extension-tool is a Python library that implements hash length extension attacks and supports multiple hashing algorithms, including MD5, SHA1, and SHA256. Its primary use case is to exploit vulnerabilities in hashing algorithms that utilize the Merkle-Damgård construction, allowing an attacker to append data to a hashed message without knowing the original input. Notable features include a straightforward API for computing hashes and performing extension attacks, as well as built-in tests to validate the implementation against standard Python hashing libraries.