Crypto.Curve25519.Pure

An implementation of the core methods of the elliptic curve Curve25519 suite. These functions are largely wrappers over the curve25519-donna library from Google. While this version is theoretically pure, in that it doesn't generate any exceptions, you should be warned that it uses unsafePerformIO under the hood.

Documentation

data PrivateKey

The type of a Curve25519 private key.

Instances

Show PrivateKey

Methods

showsPrec :: Int -> PrivateKey -> ShowS

show :: PrivateKey -> String

showList :: [PrivateKey] -> ShowS

data PublicKey

The type of a Curve25519 public key.

Instances

Show PublicKey

Methods

showsPrec :: Int -> PublicKey -> ShowS

show :: PublicKey -> String

showList :: [PublicKey] -> ShowS

importPublic :: ByteString -> Maybe PublicKey

Import a public key from a ByteString. The ByteString must be exactly 32 bytes long for this to work.

exportPublic :: PublicKey -> ByteString

Export a public key to a ByteString.

importPrivate :: ByteString -> Maybe PrivateKey

Imports a ByteString to use as private key. The ByteString must be exactly 32 bytes long for this to work.

Though minor changes may be made to create a valid key this property is guaranteed: prop> (x -> importPrivate x >>= (importPrivate . exportPrivate)) = importPrivate

exportPrivate :: PrivateKey -> ByteString

Export a private key to a ByteString

generatePrivate :: CryptoRandomGen g => g -> Either GenError (PrivateKey, g)

Randomly generate a Curve25519 private key.

generatePublic :: PrivateKey -> PublicKey

Randomly generate a Curve25519 public key.

generateKeyPair :: CryptoRandomGen g => g -> Either GenError (PrivateKey, PublicKey, g)

Randomly generate a key pair.

makeShared :: PrivateKey -> PublicKey -> ByteString

Generate a shared secret from a private key and a public key.