cryptohash-md5

Fast, pure and practical MD5 implementation

https://github.com/hvr/cryptohash-md5

Version on this page:0.11.100.1@rev:5
LTS Haskell 24.20:0.11.101.0@rev:6
Stackage Nightly 2025-11-16:0.11.101.0@rev:6
Latest on Hackage:0.11.101.0@rev:6

See all snapshots cryptohash-md5 appears in

BSD-3-Clause licensed
Maintained by Herbert Valerio Riedel
This version can be pinned in stack with:cryptohash-md5-0.11.100.1@sha256:a4a528bf378bf747eed3748459acf02ed35b9200ec0403d34dbba55b7c9eaab7,3964

Module documentation for 0.11.100.1

Depends on 2 packages(full list with versions):
base, bytestring
Used by 2 packages in lts-16.11(full list with versions):
bson, uuid

A practical incremental and one-pass, pure API to the MD5 hash algorithm (including HMAC support) with performance close to the fastest implementations available in other languages.

The implementation is made in C with a haskell FFI wrapper that hides the C implementation.

If, instead, you require a pure Haskell implementation and performance is secondary, please refer to the pureMD5 package.

Packages in the cryptohash-* family

Relationship to the cryptohash package and its API

This package has been originally a fork of cryptohash-0.11.7 because the cryptohash package had been deprecated and so this package continues to satisfy the need for a lightweight package providing the MD5 hash algorithm without any dependencies on packages other than base and bytestring. The API exposed by cryptohash-md5-0.11.*'s Crypto.Hash.MD5 module is guaranteed to remain a compatible superset of the API provided by the cryptohash-0.11.7's module of the same name.

Consequently, this package is designed to be used as a drop-in replacement for cryptohash-0.11.7's Crypto.Hash.MD5 module, though with a clearly smaller footprint by almost 3 orders of magnitude.

Changes

0.11.100.1

  • Use __builtin_bswap{32,64} only with GCC >= 4.3

0.11.100.0

  • new hmac and hmaclazy functions providing HMAC-MD5 computation conforming to RFC2104 and RFC2202

0.11.7.2

  • switch to ‘safe’ FFI for calls where overhead becomes neglible
  • removed inline assembly in favour of portable C constructs
  • fix 32bit length overflow bug in hash function
  • fix inaccurate context-size
  • add context-size verification to incremental API operations
  • fix unaligned memory-accesses

0.11.7.1

  • first version forked off cryptohash-0.11.7 release