Crypto.Box.Internal

Internals of crypto_box.

Documentation

type SecretKey = SizedByteArray CRYPTO_BOX_SECRETKEYBYTES ScrubbedBytes

Secret key that can be used for Box.

toSecretKey :: ScrubbedBytes -> Maybe SecretKey

Convert bytes to a secret key.

type PublicKey = SizedByteArray CRYPTO_BOX_PUBLICKEYBYTES ByteString

Public key that can be used for Box.

toPublicKey :: ByteString -> Maybe PublicKey

Convert bytes to a public key.

keypair :: IO (PublicKey, SecretKey)

Generate a new SecretKey together with its PublicKey.

Note: this function is not thread-safe (since the underlying C function is not thread-safe both in Sodium and in NaCl)! Either make sure there are no concurrent calls or see Crypto.Init in crypto-sodium to learn how to make this function thread-safe.

type Nonce a = SizedByteArray CRYPTO_BOX_NONCEBYTES a

Nonce that can be used for Box.

This type is parametrised by the actual data type that contains bytes. This can be, for example, a ByteString.

toNonce :: ByteArrayAccess ba => ba -> Maybe (Nonce ba)

Make a Nonce from an arbitrary byte array.

This function returns Just if and only if the byte array has the right length to be used as a nonce with a Box.

create

Arguments

:: (ByteArrayAccess nonce, ByteArrayAccess pt, ByteArray ct)

=> PublicKey

Receiver’s public key

-> SecretKey

Sender’s secret key

-> Nonce nonce

Nonce

-> pt

Plaintext message

-> IO ct

Encrypt a message.

open

Arguments

:: (ByteArrayAccess nonce, ByteArray pt, ByteArrayAccess ct)

=> SecretKey

Receiver’s secret key

-> PublicKey

Sender’s public key

-> Nonce nonce

Nonce

-> ct

Cyphertext

-> IO (Maybe pt)

Decrypt a message.