Hello Gophers,
I have wrote some encryption and decryption code recently and find out
in cbcDecrypter , and cbcEncrypter provided by runtime, it panic instead
of return error, thus I need to used defer to recover from the panic , if
it ever happens
The question is why it is implement in this way?
For example h
ttps://github.com/golang/go/blob/master/src/crypto/cipher/cbc.go#L114
my guess is because interface is designed that way.
https://github.com/golang/go/blob/master/src/crypto/cipher/cipher.go#L45
type BlockMode interface {
// BlockSize returns the mode's block size.
BlockSize() int
// CryptBlocks encrypts or decrypts a number of blocks. The length of
// src must be a multiple of the block size. Dst and src may point to
// the same memory.
CryptBlocks(dst, src []byte)
}
Is there a reason why the interface is not design in a way that returns
error? what I means is like
type BlockMode interface {
// BlockSize returns the mode's block size.
BlockSize() (int,error)
// CryptBlocks encrypts or decrypts a number of blocks. The length of
// src must be a multiple of the block size. Dst and src may point to
// the same memory.
CryptBlocks(dst, src []byte) error
}
Thanks
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