Data.DTA.Crypt

The encryption scheme used for DTB files found on game discs.

Documentation

oldCrypt :: Crypt

The lazy infinite list of crypt bytes for old-style encryption.

newCrypt :: Crypt

The lazy infinite list of crypt bytes for new-style encryption.

decrypt :: Crypt -> ByteString -> ByteString

Take the first four bytes of the string as the key, and decrypt the rest of the file.

encrypt :: Crypt -> Key -> ByteString -> ByteString

Encrypt a string with a key, and append the key to the encrypted string.

decryptFile :: Crypt -> FilePath -> FilePath -> IO ()

Decrypt an encrypted DTB file using the given crypt method.

encryptFile :: Crypt -> Key -> FilePath -> FilePath -> IO ()

Encrypt an unencrypted DTB file using the given crypt method and key.

decryptHandle :: Crypt -> Handle -> Handle -> IO ()

Decrypt an encrypted DTB file across two handles.

encryptHandle :: Crypt -> Key -> Handle -> Handle -> IO ()

Encrypt an unencrypted DTB files across two handles.

type Key = Word32

An encryption/decryption key.

type Crypt = Key -> [Word8]

Using a key to generate an infinite stream of crypt bytes.