INNER CODE UNIT · Go

NewCBCRMAC

emmansun/gmsm · cbcmac/cbcmac.go:500

func NewCBCRMAC(b cipher.Block, size int) BlockCipherMAC {
	if size <= 0 || size > b.BlockSize() {
		panic("cbcmac: invalid size")
	}
	return &cbcrMAC{b: b, size: size}
}

// Size returns the MAC value's number of bytes.
// See [github.com/emmansun/gmsm/cbcmac.BlockCipherMAC.Size].
func (c *cbcrMAC) Size() int {
	return c.size
}

// MAC calculates the MAC of the given data.
// See [github.com/emmansun/gmsm/cbcmac.BlockCipherMAC.MAC].
func (c *cbcrMAC) MAC(src []byte) []byte {
	blockSize := c.b.BlockSize()
	tag := make([]byte, blockSize)

View source record →