Data.Digest.Pure.SHA

Pure implementations of the SHA suite of hash functions. The implementation is basically an unoptimized translation of FIPS 180-2 into Haskell. If you're looking for performance, you probably won't find it here.

Documentation

data Digest

An abstract datatype for digests.

Instances

Eq Digest

Ord Digest

Show Digest

sha1 :: ByteString -> Digest

Compute the SHA-1 hash of the given ByteString. The output is guaranteed to be exactly 160 bits, or 20 bytes, long. This is a good default for programs that need a good, but not necessarily hyper-secure, hash function.

sha224 :: ByteString -> Digest

Compute the SHA-224 hash of the given ByteString. Note that SHA-224 and SHA-384 differ only slightly from SHA-256 and SHA-512, and use truncated versions of the resulting hashes. So using 224/384 may not, in fact, save you very much ...

sha256 :: ByteString -> Digest

Compute the SHA-256 hash of the given ByteString. The output is guaranteed to be exactly 256 bits, or 32 bytes, long. If your security requirements are pretty serious, this is a good choice. For truly significant security concerns, however, you might try one of the bigger options.

sha384 :: ByteString -> Digest

Compute the SHA-384 hash of the given ByteString. Yup, you guessed it, the output will be exactly 384 bits, or 48 bytes, long.

sha512 :: ByteString -> Digest

For those for whom only the biggest hashes will do, this computes the SHA-512 hash of the given ByteString. The output will be 64 bytes, or 512 bits, long.

showDigest :: Digest -> String

Convert a digest to a string. The digest is rendered as fixed with hexadecimal number.

integerDigest :: Digest -> Integer

Convert a digest to an Integer.

bytestringDigest :: Digest -> ByteString

Convert a digest to a ByteString.