INNER CODE UNIT · Go

NewLMACWithPadding

emmansun/gmsm · cbcmac/cbcmac.go:399

func NewLMACWithPadding(creator func(key []byte) (cipher.Block, error), key []byte, size int, newPaddingFunc padding.NewPaddingFunc) BlockCipherMAC {
	var b, b1, b2 cipher.Block
	var err error
	if b, err = creator(key); err != nil {
		panic(err)
	}
	if size <= 0 || size > b.BlockSize() {
		panic("cbcmac: invalid size")
	}
	blockSize := b.BlockSize()
	key1 := make([]byte, blockSize)
	key1[blockSize-1] = 0x01
	key2 := make([]byte, blockSize)
	key2[blockSize-1] = 0x02
	b.Encrypt(key1, key1)
	b.Encrypt(key2, key2)
	if b1, err = creator(key1); err != nil {
		panic(err)

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