INNER CODE UNIT · Go

NewMACDES

emmansun/gmsm · cbcmac/cbcmac.go:177

func NewMACDES(creator func(key []byte) (cipher.Block, error), key1, key2 []byte, size int) BlockCipherMAC {
	return NewMACDESWithPadding(creator, key1, key2, size, padding.NewISO9797M2Padding)
}

// NewMACDESWithPadding creates a new BlockCipherMAC using DES encryption with padding.
func NewMACDESWithPadding(creator func(key []byte) (cipher.Block, error), key1, key2 []byte, size int, newPaddingFunc padding.NewPaddingFunc) BlockCipherMAC {
	var b1, b2, b3 cipher.Block
	var err error
	if b1, err = creator(key1); err != nil {
		panic(err)
	}
	if size <= 0 || size > b1.BlockSize() {
		panic("cbcmac: invalid size")
	}
	if b2, err = creator(key2); err != nil {
		panic(err)
	}
	key3 := make([]byte, len(key2))

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