if !x.decrypt {
			copy(x.next[x.outUsed:], dst)
		}
		dst = dst[n:]
		src = src[n:]
		x.outUsed += n
	}
}

// NewCFBEncrypter returns a [Stream] which encrypts with cipher feedback mode,
// using the given [Block]. The iv must be the same length as the [Block]'s block
// size.
func NewCFBEncrypter(block Block, iv []byte) Stream {
	return newCFB(block, iv, false)
}

		{"AEAD", Type, 2},
		{"Block", Type, 0},
		{"BlockMode", Type, 0},
		{"NewCBCDecrypter", Func, 0},
		{"NewCBCEncrypter", Func, 0},
		{"NewCFBDecrypter", Func, 0},
		{"NewCFBEncrypter", Func, 0},
		{"NewCTR", Func, 0},
		{"NewGCM", Func, 2},
		{"NewGCMWithNonceSize", Func, 5},
		{"NewGCMWithTagSize", Func, 11},
		{"NewOFB", Func, 0},
		{"Stream", Type, 0},
		{"StreamReader", Type, 0},