ripemd160

A pure Haskell implementation of RIPEMD-160 and HMAC-RIPEMD160 on strict and lazy ByteStrings.

Usage

A sample GHCi session:

  > :set -XOverloadedStrings
  >
  > -- import qualified
  > import qualified Crypto.Hash.RIPEMD160 as RIPEMD160
  >
  > -- 'hash' and 'hmac' operate on strict bytestrings
  >
  > let hash_s = RIPEMD160.hash "strict bytestring input"
  > let hmac_s = RIPEMD160.hmac "strict secret" "strict bytestring input"
  >
  > -- 'hash_lazy' and 'hmac_lazy' operate on lazy bytestrings
  > -- but note that the key for HMAC is always strict
  >
  > let hash_l = RIPEMD160.hash_lazy "lazy bytestring input"
  > let hmac_l = RIPEMD160.hmac_lazy "strict secret" "lazy bytestring input"
  >
  > -- results are always unformatted 160-bit (20-byte) strict bytestrings
  >
  > import qualified Data.ByteString as BS
  >
  > BS.take 10 hash_s
  "=\211\211\197]\NULJ\223n\223"
  > BS.take 10 hmac_l
  "\154\248\145[\196\ETX\f\ESC\NULs"
  >
  > -- you can use third-party libraries for rendering if needed
  > -- e.g., using ppad-base16:
  >
  > import qualified Data.ByteString.Base16 as B16
  >
  > B16.encode hash_s
  "3dd3d3c55d004adf6edf9e11cb01f9ac9c56441f"
  > B16.encode hmac_l
  "9af8915bc4030c1b007323c8531b3129d82f50bd"

Documentation

Haddocks (API documentation, etc.) are hosted at docs.ppad.tech/ripemd160.

Performance

The aim is best-in-class performance for pure, highly-auditable Haskell code.

Current benchmark figures on my M4 Silicon MacBook Air look like (use cabal bench to run the benchmark suite):

  benchmarking ppad-ripemd160/RIPEMD160 (32B input)/hash
  time                 179.1 ns   (178.9 ns .. 179.3 ns)
                       1.000 R²   (1.000 R² .. 1.000 R²)
  mean                 179.7 ns   (179.5 ns .. 179.9 ns)
  std dev              715.4 ps   (538.9 ps .. 988.3 ps)

  benchmarking ppad-ripemd160/HMAC-RIPEMD160 (32B input)/hmac
  time                 661.4 ns   (660.0 ns .. 663.3 ns)
                       1.000 R²   (1.000 R² .. 1.000 R²)
  mean                 667.3 ns   (664.7 ns .. 669.9 ns)
  std dev              8.607 ns   (7.495 ns .. 9.627 ns)
  variance introduced by outliers: 12% (moderately inflated)

Compile with the 'llvm' flag for maximum performance.

Security

This library aims at the maximum security achievable in a garbage-collected language under an optimizing compiler such as GHC, in which strict constant-timeness can be challenging to achieve.

The RIPEMD-160 functions pass the vectors present in the official spec, and the HMAC-RIPEMD160 functions pass all vectors found contained in RFC2286.

If you discover any vulnerabilities, please disclose them via security@ppad.tech.

Development

You'll require Nix with flake support enabled. Enter a development shell with:

$ nix develop

Then do e.g.:

$ cabal repl ppad-ripemd160

to get a REPL for the main library.