May 26, 2018


A practical incremental and one-pass, pure API to the SHA-256 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.

NOTE This package has been forked off cryptohash-0.11.7 because the cryptohash package has been deprecated and so this package continues to satisfy the need for a lightweight package providing the SHA256 hash algorithm without any dependencies on packages other than base and bytestring.

Consequently, this package can be used as a drop-in replacement for cryptohash’s Crypto.Hash.SHA256 module, though with a clearly smaller footprint.

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