Safe Haskell	Safe-Inferred
Language	Haskell98

Data.Digest.Pure.SHA

Contents

Digest and related functions
Calculating hashes
Calculating message authentication codes (MACs)
Internal routines included for testing

Description

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.

Synopsis

`Digest` and related functions

data Digest t Source

An abstract datatype for digests.

Instances

Eq (Digest t)
Ord (Digest t)
Show (Digest t)
Binary (Digest SHA512State)
Binary (Digest SHA256State)
Binary (Digest SHA1State)

data SHA1State Source

Instances

Binary SHA1State
Binary (Digest SHA1State)

data SHA256State Source

Instances

Binary SHA256State
Binary (Digest SHA256State)

data SHA512State Source

Instances

Binary SHA512State
Binary (Digest SHA512State)

showDigest :: Digest t -> String Source

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

integerDigest :: Digest t -> Integer Source

Convert a digest to an Integer.

bytestringDigest :: Digest t -> ByteString Source

Convert a digest to a ByteString.

Calculating hashes

sha1 :: ByteString -> Digest SHA1State Source

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 SHA256State Source

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 SHA256State Source

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 SHA512State Source

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 SHA512State Source

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.

sha1Incremental :: Decoder SHA1State Source

Similar to sha1 but use an incremental interface. When the decoder has been completely fed, completeSha1Incremental must be used so it can finish successfully.

completeSha1Incremental :: Decoder SHA1State -> Int -> Digest SHA1State Source

sha224Incremental :: Decoder SHA256State Source

Similar to sha224 but use an incremental interface. When the decoder has been completely fed, completeSha224Incremental must be used so it can finish successfully.

completeSha224Incremental :: Decoder SHA256State -> Int -> Digest SHA256State Source

sha256Incremental :: Decoder SHA256State Source

Similar to sha256 but use an incremental interface. When the decoder has been completely fed, completeSha256Incremental must be used so it can finish successfully.

completeSha256Incremental :: Decoder SHA256State -> Int -> Digest SHA256State Source

sha384Incremental :: Decoder SHA512State Source

Similar to sha384 but use an incremental interface. When the decoder has been completely fed, completeSha384Incremental must be used so it can finish successfully.

completeSha384Incremental :: Decoder SHA512State -> Int -> Digest SHA512State Source

sha512Incremental :: Decoder SHA512State Source

Similar to sha512 but use an incremental interface. When the decoder has been completely fed, completeSha512Incremental must be used so it can finish successfully.

completeSha512Incremental :: Decoder SHA512State -> Int -> Digest SHA512State Source