// new returns a fresh instance of the given cipher.
func (cipher CipherFunction) new(key []byte) (block cipher.Block) {
switch cipher {
case Cipher3DES:
block, _ = des.NewTripleDESCipher(key)
case CipherCAST5:
block, _ = cast5.NewCipher(key)
case CipherAES128, CipherAES192, CipherAES256:
block, _ = aes.NewCipher(key)
}
return
}
func newCast5Stream(key, iv []byte, doe DecOrEnc) (cipher.Stream, error) {
block, err := cast5.NewCipher(key)
return newStream(block, err, key, iv, doe)
}